JP2019132472A - Water heater - Google Patents

Abstract

To provide a water heater capable of starting hot water filling operation without waste use of hot water, even when a trouble occurs in communication with an automatic bathtub plug.SOLUTION: A water heater includes a bathtub plug state detection portion for detecting an opening/closing state of a bathtub plug disposed at a drain port of a bathtub, a water flow detection portion for detecting circulation of hot water/water in a circulation circuit connected to the bathtub, and a control portion instructing filling of the bathtub with hot water with a first reference hot water amount less than a set hot water filling amount in a case when the closing state of the bathtub plug is not detected by the bathtub plug state detection portion, then instructing circulation of hot water/water in the circulation circuit, and instructing filling of the bathtub with hot water by the set hot water filling amount when the circulation of hot water/water is detected by the water flow detection portion, and instructing stop of the filling of the bathtub with hot water when the circulation of the hot water/water is not detected by the water flow detection portion, when a closing operation of the bathtub plug is instructed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water heater.

  Patent document 1 discloses a water heater. In the water heater, the hot water operation and the operation of opening and closing the bathtub plug are linked. For example, after instructing the closing operation of the bathtub plug, the water heater starts the hot water operation after detecting the closed state of the bathtub plug.

JP 20022574741A

  However, the water heater described in Patent Document 1 cannot detect the closed state of the bathtub plug when there is a failure in communication with the bathtub plug due to disconnection of the wiring or the like. In this case, the hot water operation is not started. In addition, if the hot water supply operation is instructed to the water heater without detecting the closed state of the bathtub plug, hot water may be supplied when the bathtub plug is not closed. In this case, hot water is wasted.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide a water heater capable of starting a hot water operation without wasting hot water even when there is a failure in communication with a bathtub tap.

  The water heater according to the present invention includes a bathtub plug state detector that detects an open / closed state of a bathtub stopper provided at a drain outlet of the bathtub, a water flow detector that detects circulation of hot water in a circulation circuit connected to the bathtub, If the bathtub plug state detection unit does not detect the closed state of the bathtub plug when instructing the closing operation of the bathtub plug, it instructs the hot water of the bathtub with the first reference hot water amount smaller than the set hot water amount. Then, instruct the circulation of hot water in the circulation circuit, and if the water flow detector detects the circulation of hot water after that, the hot water in the bathtub is instructed to the set amount of hot water. And a control unit for instructing to stop the hot water in the bathtub.

  According to the present invention, even when there is a failure in communication with the bathtub stopper, the hot water operation can be started without wasting hot water.

It is a block diagram of the hot water supply system with which the hot water supply apparatus in Embodiment 1 is applied. 3 is a configuration diagram of a remote controller for a water heater in Embodiment 1. FIG. It is a flowchart for demonstrating the process after detecting the state of a bathtub stopper in the water heater in Embodiment 1 until it starts hot water operation. FIG. 5 is a flowchart for explaining a process at the time of the first hot watering operation when the closed state of the bathtub tap is not detected in the water heater in the first embodiment. It is a flowchart for demonstrating the process after the hot water supply start in the case of the non-detection of the closed state of a bathtub stopper in the water heater in Embodiment 1. FIG.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping explanation of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a hot water supply system to which a hot water supply apparatus according to Embodiment 1 is applied.

  In FIG. 1, a bathtub 1 is provided in a household bathroom or the like. The bathtub plug 2 is provided at a drain outlet of the bathtub 1. The bathtub adapter 3 is provided on the inner surface of the bathtub 1. The bathtub stopper driving unit 4 is electrically connected to the bathtub stopper 2. The bathtub stopper drive unit 4 is provided so that the bathtub stopper 2 can be opened and closed. The open / close switch 5 is provided so as to be interlocked with the bathtub stopper driving unit 4. The open / close switch 5 is provided so that the bathtub plug 2 can be manually opened and closed.

  The automatic bathtub stopper controller 6 is electrically connected to the bathtub stopper driver 4. The automatic bathtub stopper controller 6 is provided so as to detect the state of the bathtub stopper driver 4. The automatic bathtub stopper control unit 6 is provided so as to perform an operation instruction of the bathtub stopper driving unit 4.

  The communication adapter 7 is provided in a home or the like where the bathtub 1 is provided.

  The external device 8 is provided so that the user can carry it. For example, the external device 8 is a smartphone. For example, the external device 8 is a tablet. The external device 8 is provided so as to be able to communicate with the communication adapter 7.

  The water heater 9 includes a heat pump unit 10, a hot water tank unit 11, and a remote controller 12.

  The heat pump unit 10 includes an air heat exchanger 13, a compressor 14, a boiling heat exchanger 15, an expansion valve 16, a refrigerant circulation pipe 17, and an HP outlet side thermistor 18.

  The heat pump unit 10 uses a heat pump cycle. Specifically, in the heat pump unit 10, the air heat exchanger 13, the compressor 14, the primary side of the boiling heat exchanger 15, and the expansion valve 16 are annularly connected by a refrigerant circulation pipe 17.

  The inlet side of the secondary side of the heating heat exchanger 15 is connected to the outlet side of the heat pump inlet pipe 19. The outlet side of the secondary side of the boiling heat exchanger 15 is connected to the inlet side of the heat pump outlet pipe 20.

  The HP outlet side thermistor 18 is provided in the heat pump outlet pipe 20 in the vicinity of the outlet side on the secondary side of the heating heat exchanger 15.

  The air heat exchanger 13 is provided so that heat can be exchanged between the refrigerant in the refrigerant circulation pipe 17 and the atmosphere. The compressor 14 is provided so as to increase the temperature of the refrigerant by compressing the refrigerant. The boiling heat exchanger 15 is provided so that heat can be exchanged between the refrigerant flowing on the primary side and the low-temperature water flowing on the secondary side. The expansion valve 16 is provided so that the temperature of the refrigerant can be lowered by expanding the refrigerant. The HP outlet side thermistor 18 is provided so as to detect the temperature of the hot water heated by the boiling heat exchanger 15.

  In order to obtain high-temperature water on the secondary side of the boiling heat exchanger 15, carbon dioxide is preferably used as the refrigerant. At this time, it is preferable to operate the heat pump unit 10 at a pressure exceeding the critical pressure of the refrigerant.

  The hot water storage tank unit 11 includes a hot water storage tank 21, a water supply pipe 22, a hot water supply pipe 23, and a plurality of remaining hot water thermistors 24.

  The lower part of the hot water storage tank 21 is provided so that low temperature water can flow in. The upper part of the hot water storage tank 21 is provided so that high temperature water can flow in. The upper and lower portions of the hot water storage tank 21 are provided so as to store hot water having a temperature difference. The outlet side of the water supply pipe 22 is connected to the lower part of the hot water storage tank 21. The water supply pipe 22 is provided so that city water can flow into the lower part of the hot water storage tank 21. The inlet side of the hot water supply pipe 23 is connected to the upper part of the hot water storage tank 21. The hot water supply pipe 23 is provided so that hot water stored in the hot water storage tank 21 can be supplied to the outside. The plurality of remaining hot water thermistors 24 are provided on the outer surface of the hot water storage tank 21 at different heights. The plurality of remaining hot water thermistors 24 are provided so as to detect the temperature distribution of hot water in the hot water storage tank 21.

  The hot water storage tank unit 11 includes a tank lower pipe 25, a first tank upper pipe 26, a second tank upper pipe 27, and a tank return pipe 28.

  The inlet side of the tank lower pipe 25 is connected to the first lower part of the hot water storage tank 21. The inlet side of the first tank upper pipe 26 is connected to a second upper portion provided between the center portion and the upper portion of the hot water storage tank 21. The entry side of the second tank upper pipe 27 is connected to the first upper part of the hot water storage tank 21. The outlet side of the tank return pipe 28 is connected to a second lower part provided between the central part and the lower part of the hot water storage tank 21.

  The hot water storage tank unit 11 includes a first three-way valve 29, a second three-way valve 30, a four-way valve 31, and a hot water supply electromagnetic valve 32.

  The first three-way valve 29 includes an a port, a b port, and a c port. The first three-way valve 29 is provided so that the flow path connecting the a port and the c port and the flow path connecting the b port and the c port can be switched. The a port is connected to the outlet side of the first tank upper pipe 26. The a port is provided so that hot water can flow from the first tank upper pipe 26. The b port is connected to the outlet side of the second tank upper pipe 27. The b port is provided so that hot water can flow from the second tank upper pipe 27. The c port is provided so that hot water can flow out.

  The second three-way valve 30 includes an a port, a b port, and a c port. The second three-way valve 30 is provided so that the flow path connecting the a port and the c port and the flow path connecting the b port and the c port can be switched. The a port is connected to the outlet side of the tank lower pipe 25. The a port is provided so that hot water can flow from the tank lower pipe 25. The b port is provided so that hot water can flow in. The c port is connected to the inlet side of the heat pump inlet pipe 19. The c port is provided so that hot water can flow out to the heat pump inlet pipe 19.

  The four-way valve 31 includes an a port, a b port, a c port, and a d port. The four-way valve 31 is provided so that the flow path connecting the a port and the b port, the flow path connecting the b port and the d port, and the flow path connecting the c port and the d port can be switched. The a port is connected to the inlet side of the tank return pipe 28. The a port is provided so that hot water can flow out to the tank return pipe 28. The b port is provided so that hot water can flow in. The c port is connected to the outlet side of the heat pump outlet pipe 20. The c port is provided so that hot water can flow from the heat pump outlet pipe 20. The d port is provided so that hot water can flow out.

  The inlet side of the hot water supply solenoid valve 32 is connected to the outlet side of the pipe connected to the first upper portion of the hot water storage tank 21.

  The hot water storage tank unit 11 includes a use side heat exchanger primary side inlet pipe 33, a use side heat exchanger primary side outlet pipe 34, a bypass pipe 35, and an upper return pipe 36.

  The inlet side of the use side heat exchanger primary side inlet pipe 33 is connected to the c port of the first three-way valve 29. The outlet side of the use side heat exchanger primary side outlet pipe 34 is connected to the b port of the second three-way valve 30. The inlet side of the bypass pipe 35 is connected between the second three-way valve 30 and the heat pump unit 10 in the heat pump inlet pipe 19. The outlet side of the bypass pipe 35 is connected to the b port of the four-way valve 31. The inlet side of the upper return pipe 36 is connected to the d port of the four-way valve 31. The outlet side of the upper return pipe 36 is connected between the first upper part of the hot water storage tank 21 in the second tank upper pipe 27 and the b port of the first three-way valve 29.

  The hot water storage tank unit 11 includes a heat source pump 37 and a use side heat exchanger 38.

  The heat source pump 37 is provided in the heat pump inlet pipe 19 on the second three-way valve 30 side than the inlet side of the bypass pipe 35. The heat source pump 37 is provided so that hot water can be circulated through various pipes inside the hot water storage tank unit 11. The inlet side on the primary side of the use side heat exchanger 38 is connected to the outlet side of the use side heat exchanger primary side inlet pipe 33. The outlet side on the primary side of the use side heat exchanger 38 is connected to the entry side of the use side heat exchanger primary side outlet pipe 34. The use side heat exchanger 38 is provided so as to heat the water to be heated on the secondary side using the high temperature water supplied from the hot water storage tank 21 or the heat pump unit 10. For example, the use-side heat exchanger 38 is provided so as to heat the circulating water for heating using high-temperature water supplied from the hot water storage tank 21 or the heat pump unit 10.

  The hot water storage tank unit 11 includes a bath circulation circuit 39.

  The inlet side of the bath circulation circuit 39 is connected to the outlet side of the bath return pipe 40. The outlet side of the bath circulation circuit 39 is connected to the inlet side of the bath piping 41. The bath circulation circuit 39 is connected to the secondary side of the use side heat exchanger 38 on the way.

  The hot water storage tank unit 11 includes a circulation pump 42, a bath outlet side thermistor 43, a flow switch 44, a water level sensor 45, a circulation fine bubble generator 46, and a water injection fine bubble generator 47.

  The circulation pump 42 is provided on the side of the bottom return pipe 40 in the bottom circulation circuit 39. The circulation pump 42 is provided so that the bathtub water can be circulated. The bathtub outlet side thermistor 43 is provided on the side of the return pipe 40 from the circulation pump 42 in the bath circulation circuit 39. The bathtub outlet side thermistor 43 is provided so as to detect the temperature of the bathtub water that has come out of the bathtub 1. The flow switch 44 is provided as a water flow detection unit closer to the use side heat exchanger 38 than the circulation pump 42 in the bath circulation circuit 39. The flow switch 44 is provided so that the presence or absence of the circulating water flow of the bathtub water can be detected by turning the switch ON when the circulating flow rate of the bathtub water becomes equal to or greater than a predetermined value. The water level sensor 45 is provided between the circulation pump 42 and the flow switch 44 in the bath circulation circuit 39. The water level sensor 45 is provided so as to detect the internal pressure of the bath circulation circuit 39 and measure the water surface height of the bathtub. The circulating fine bubble generating device 46 is provided on the use side heat exchanger 38 side with respect to the flow switch 44 in the bath circulation circuit 39. The circulating fine bubble generating device 46 is provided so as to generate fine bubbles inside the bath circulation circuit 39. The water injection fine bubble generating device 47 is provided in the middle of the pipe connecting the outlet side of the bath hot water solenoid valve 32 and the bath circulating circuit 39. The fine water bubble generating device 47 for water injection is provided so that fine air bubbles can be generated inside the pipe during water injection.

  The hot water storage tank unit 11 includes a control unit 48.

  The controller 48 is electrically connected to various devices of the heat pump unit 10. The controller 48 is electrically connected to various devices of the hot water storage tank unit 11. The control part 48 is provided so that operation | movement of these apparatuses can be controlled.

  For example, the control unit 48 grasps the amount of remaining hot water inside the hot water storage tank 21 based on the temperature distribution detected by the plurality of remaining hot water thermistors 24. The controller 48 controls the start and stop of the hot water boiling operation inside the hot water storage tank 21 by the heat pump unit 10 based on the remaining hot water amount inside the hot water storage tank 21.

  For example, the controller 48 opens the hot water supply electromagnetic valve 32 when supplying hot water to the bathtub 1.

  The control unit 48 includes a bathtub plug state detection unit 49 and a bathtub plug operation instruction unit 50.

  The bathtub plug state detection unit 49 and the bathtub plug operation instruction unit 50 are electrically connected to the automatic bathtub plug control unit 6.

  The bathtub plug state detecting unit 49 is provided so as to detect the open / closed state of the bathtub plug 2 via the automatic bathtub plug control unit 6. The bathtub plug operation instruction unit 50 is provided so that an operation instruction can be given to the bathtub plug driving unit 4 via the automatic bathtub plug control unit 6.

  For example, the bathtub stopper operation instruction section 50 instructs the bathtub stopper driving section 4 to close when hot water starts.

  The remote controller 12 is connected to the control unit 48 by wire or wirelessly. The remote controller 12 is provided so as to function as an input / output device of the control unit 48.

  FIG. 2 is a configuration diagram of a remote controller of the water heater in the first embodiment.

  As shown in FIG. 2, the remote controller 12 includes a plurality of operation units 51, an audio output unit 52, and a display unit 53.

  For example, each of the plurality of operation units 51 is provided on the lower right side of the remote controller 12. Each of the plurality of operation units 51 is provided so as to accept input of information or instructions. For example, the audio output unit 52 is provided on the left side of the lower portion of the remote control 12 as a notification unit. The audio output unit 52 is provided so that information can be output by audio. For example, the display unit 53 is provided in the upper part of the remote controller 12 as a notification unit. The display unit 53 is provided so that information can be output by display.

  FIG. 3 is a flowchart for explaining processing from the detection of the state of the bathtub tap in the hot water supply apparatus according to Embodiment 1 to the start of the hot water operation.

  In step S <b> 1, the control unit 48 instructs the automatic bathtub plug control unit 6 to close the bathtub plug 2 using the bathtub plug operation instruction unit 50. Then, the control part 48 performs operation | movement of step S2. In step S <b> 2, the control unit 48 determines whether or not the bathtub plug state detection unit 49 detects the closed state of the bathtub plug 2.

  When the bathtub tap state detection part 49 has detected the closed state of the bathtub stopper 2 at step S2, the control part 48 performs operation | movement of step S3. In step S3, the control part 48 memorize | stores the information which shows the detection of the closed state of the bathtub stopper 2 as a bathtub stopper closing operation | movement history. Then, the control part 48 performs operation | movement of step S4. In step S4, the control unit 48 starts the hot water operation. Thereafter, the control unit 48 ends the operation.

  When the bathtub plug state detection unit 49 does not detect the closed state of the bathtub plug 2 in step S <b> 2, the control unit 48 considers the possibility that the bathtub plug 2 is being closed. Specifically, the control unit 48 performs the operation of step S5.

  In step S5, the control unit 48 determines whether or not the elapsed time since the hot water operation has exceeded the first time. For example, the control unit 48 sets the maximum time 20 seconds required from the open state to the closed state including the retry operation after the bathtub plug driving unit 4 receives the signal from the bathtub operation instruction unit 50 as the first time. It is determined whether or not the elapsed time since the operation has passed for the first time or more.

  When the elapsed time from the hot water operation at step S5 has not elapsed for the first time or more, the control unit 48 determines that the instruction for the closing operation to the bathtub plug 2 has not arrived. In this case, the control unit 48 performs the operation of step S6. In step S <b> 6, the control unit 48 determines whether or not the elapsed time from the hot water operation has passed for a second time shorter than the first time. For example, the control unit 48 assumes that the communication transmission failure from the bathtub tap operation instruction unit 50 is assumed to be a second time as 5 seconds, which is the time until the closing signal is retransmitted, and the elapsed time from the hot water operation is short. It is determined whether two hours or more have elapsed.

  When the elapsed time from the hot water operation at step S6 has not elapsed for the second time or longer, the control unit 48 performs the operation of step S2 to confirm the state of the bathtub stopper 2 again. When the elapsed time from the hot water operation at step S6 has passed the second time or more, the control unit 48 performs the operation of step S1 to instruct the closing operation to the bathtub stopper 2 again.

  When the elapsed time from the hot water operation at step S5 has passed for the first time or more, the control unit 48 determines that a communication failure has occurred between the bathtub plug 2 and the bathtub plug state detection unit 49. To do. In this case, the control unit 48 performs the operation of step S7 regardless of the detection state of the bathtub plug state detection unit 49.

  In step S7, the control part 48 memorize | stores the information which shows that the closed state of the bathtub stopper 2 is not detected. Then, the control part 48 performs operation | movement of step S4.

  FIG. 4 is a flowchart for explaining a process during the initial hot water operation when the bathtub tap is not detected in the water heater in the first embodiment.

  In step S8, the control part 48 determines whether the information which shows that the closed state of the bathtub tap 2 is undetected by step S7 of FIG. 3 is memorize | stored.

  When the undetected state of the closed state of the bathtub tap 2 is not stored in step S8, the control unit 48 ends the operation.

  When the non-detection of the closed state of the bathtub tap 2 is stored in step S8, the control unit 48 performs the operation of step S9.

  In step S9, the control unit 48 determines whether or not there is a history that hot water cooperation with the bathtub tap 2 has been completed before the current hot water operation.

  If there is a history of completion of hot water cooperation with the bathtub stopper 2 before the current hot water operation in step S9, the control unit 48 ends the operation. For example, when the hot water operation at this time is not the first hot water operation as usual, the control unit 48 ends the operation.

  If there is no history of completion of hot water cooperation with the bathtub stopper 2 before the current hot water operation in step S9, the control unit 48 performs the operation of step S10. For example, in the case where the current hot water operation is a first hot water operation such as a trial operation performed when the water heater 9 is installed, the control unit 48 performs the operation of step S10.

  In step S10, the control unit 48 stops the hot water operation. Then, the control part 48 performs operation | movement of step S11. In step S <b> 11, the control unit 48 causes the remote controller 12 to notify the remote controller 12 of guidance for urging the hot water operation and confirming the connection with the bathtub stopper 2. For example, the control unit 48 causes the voice output unit 52 of the remote controller 12 to output the guidance by voice. For example, the control unit 48 causes the display 53 of the remote controller 12 to output the guidance by displaying characters.

  FIG. 5 is a flowchart for explaining the processing after the start of hot water supply when the closed state of the bathtub plug is not detected in the water heater in the first embodiment.

  In step S12, the control part 48 determines whether the undetected state of the closed state of the bathtub tap 2 was memorize | stored by step S7 of FIG.

  When the undetected state of the closed state of the bathtub tap 2 is not stored in step S12, the control unit 48 performs the operation of step S13. In step S <b> 13, the controller 48 continues the hot water operation to the set amount of hot water without confirming that the bathtub stopper 2 is closed. Thereafter, the control unit 48 ends the operation.

  When the non-detection of the bathtub stopper 2 is stored in step S12, the control unit 48 performs the operation of step S14.

  In step S14, the control unit 48 supplies the first reference hot water amount to the bathtub 1 that is smaller than the final hot water amount. For example, in the controller 48, the water heater 9 learns in advance and supplies hot water. For example, the control unit 48 supplies hot water 30L to the extent that the bathtub adapter 3 is hidden. Then, the control part 48 performs operation | movement of step S15.

  In step S <b> 15, the control unit 48 operates the circulation pump 42. At this time, the control unit 48 detects the presence or absence of hot water circulation based on the detection result of the flow switch 44. Then, the control part 48 performs operation | movement of step S16.

  In step S16, the control part 48 determines whether there is bathtub water based on the presence or absence of the circulation of hot water.

  When there is bathtub water in step S16, the controller 48 performs the operation of step S13.

  When there is no bathtub water in step S16, the control part 48 performs operation | movement of step S17. In step S <b> 17, the control unit 48 determines that there is a concern about the open state of the bathtub plug 2. In this case, the control unit 48 stops the hot water operation. Then, the control part 48 performs operation | movement of step S18.

  In step S <b> 18, the control unit 48 causes the remote controller 12 to notify the remote controller 12 of guidance indicating that the hot water filling operation has been stopped because there is a concern about the open state of the bathtub stopper 2. For example, the control unit 48 causes the voice output unit 52 of the remote controller 12 to output the guidance by voice. For example, the control unit 48 causes the display 53 of the remote controller 12 to output the guidance by displaying characters. For example, the control unit 48 may notify the external device 8 of the same guidance via the communication adapter 7.

  According to Embodiment 1 demonstrated above, when the bathtub tap state detection part 49 does not detect the closed state of the bathtub tap 2, the hot water of the bathtub 1 in the 1st reference | standard hot water amount is instruct | indicated. Thereafter, when the flow switch 44 detects the circulation of the hot water, the hot water in the bathtub 1 is instructed to the set hot water amount. On the other hand, when the flow switch 44 does not detect the circulation of hot water, an instruction to stop hot water in the bathtub 1 is given. For this reason, even when there is a failure in communication with the bathtub plug 2, the hot water operation can be started without wasting hot water.

  Further, when the flow switch 44 does not detect the circulation of hot water, the remote controller 12 notifies information prompting confirmation of the open / close state of the bathtub stopper 2. For this reason, it is possible to prompt the user to manually close the bathtub stopper 2.

  Further, when the flow switch 44 does not detect the circulation of the hot water, the control unit 48 instructs the closing operation of the bathtub plug 2 again before the remote controller 12 notifies the information prompting the confirmation of the open / close state of the bathtub plug 2. For this reason, when a failure is temporary in communication with the bathtub plug 2, it is possible to avoid the user closing the bathtub plug 2 manually.

  Moreover, in the state where the bathtub plug 2 has not been closed, when the operation of closing the bathtub plug 2 is instructed and the bathtub plug state detection unit 49 does not detect the closed state of the bathtub plug 2, the bathtub 1 with the first reference hot water amount is used. No hot water is given. At this time, the remote controller 12 notifies information prompting confirmation of the connection between the bathtub stopper 2 and the water heater 9. For this reason, at the time of construction failure, before starting the hot water supply to the bathtub 1, it is possible to prompt the builder to confirm the construction failure location.

  In addition, when the hot water of the bathtub 1 is instructed without detecting the closed state of the bathtub tap 2, information indicating that the hot water of the bathtub 1 has been implemented without detecting the closed state of the bathtub plug 2 is externally provided. You may make the apparatus 8 alert | report. For example, the external device 8 may be notified of the information via a HEMS (Home Energy Management System). In this case, it is possible to appropriately indicate to the user the status of cooperation between the water heater 9, the bathtub plug 2, and the water heater 9.

  In addition, by using the operation unit 51 of the remote controller, one mode is selected from the first mode in which the hot water operation of the water heater 9 and the closing operation of the bathtub tap 2 are linked and the second mode that is not linked. Also good. In this case, the setting of the water heater 9 can be changed according to the user's habits.

  For example, when the connection with the bathtub plug 2 is not detected when the first mode is set, the hot water of the bathtub 1 may be instructed regardless of the detection of the open / closed state of the bathtub plug 2. For example, when the hot water instruction in the undetected state where the bathtub tap 2 is closed is performed five times, it may be determined that the bathtub stopper 2 and the water heater 9 are not connected. In this case, even if the mode is set by mistake, the time required for detecting the closed state of the bathtub stopper 2 can be shortened and the hot water operation can be started.

  When the hot mode of the bathtub 1 is instructed when the second mode is set, the remote controller 12 may be notified of information that prompts confirmation of the closed state of the bathtub plug 2. In this case, waste of hot water can be suppressed.

  On the other hand, when the hot water of the bathtub 1 is instructed when the first mode is set, it is not necessary to notify the remote controller 12 of information prompting confirmation of the closed state of the bathtub tap 2. Even in this case, hot water is not wasted.

  Moreover, even if the bathtub stopper state detection part 49 detects the open state of the bathtub stopper 2 after the hot water supply of the bathtub 1 is started, you may continue hot water operation. For example, even if the user opens the bathtub tap 2 with the open / close switch 5, the hot water operation may be continued. At this time, information indicating that the bathtub stopper 2 is opened during hot water in the bathtub 1 may be displayed on the display unit 53 of the remote controller 12. Moreover, you may display the information which shows that the bathtub stopper 2 opened during the hot water of the bathtub 1 on the external device 8. Furthermore, when the bathtub water is low when the hot water of the bathtub 1 is completed, information indicating that the bathtub water is low due to the opening of the bathtub plug 2 is displayed on at least one of the display unit 53 of the remote controller 12 and the external device 8. May be.

  Further, as information indicating the open / closed state of the bathtub plug 2, at least one of a character and a character may be displayed on at least one of the display unit 53 of the remote controller 12 and the external device 8. In this case, the opening / closing state of the bathtub plug 2 can be notified to the user of the opening / closing state of the bathtub plug 2 only by at least one of the display unit 53 and the external device 8.

  DESCRIPTION OF SYMBOLS 1 Bathtub, 2 Bathtub stopper, 3 Bathtub adapter, 4 Bathtub stopper drive part, 5 Open / close switch, 6 Automatic bathtub stopper control part, 7 Communication adapter, 8 External apparatus, 9 Water heater, 10 Heat pump unit, 11 Hot water storage tank unit, 12 Remote control, 13 air heat exchanger, 14 compressor, 15 heating heat exchanger, 16 expansion valve, 17 refrigerant circulation piping, 18 HP outlet side thermistor, 19 heat pump inlet piping, 20 heat pump outlet piping, 21 hot water storage tank, 22 Water supply piping, 23 Hot water supply piping, 24 Remaining hot water thermistor, 25 Tank lower piping, 26 First tank upper piping, 27 Second tank upper piping, 28 Tank return piping, 29 First three-way valve, 30 Second three-way Valve, 31 four-way valve, 32 bath water solenoid valve, 33 Side heat exchanger primary side inlet piping, 34 Usage side heat exchanger primary side outlet piping, 35 Bypass piping, 36 Upper return piping, 37 Heat source pump, 38 Usage side heat exchanger, 39 Bath circulation circuit, 40 Bath Return piping, 41 Outlet piping, 42 Circulation pump, 43 Bath outlet thermistor, 44 Flow switch, 45 Water level sensor, 46 Circulating fine bubble generator, 47 Injection fine bubble generator, 48 Control unit, 49 Bathtub state Detection unit, 50 Bathtub operation instruction unit, 51 Operation unit, 52 Audio output unit, 53 Display unit

Claims (11)

A bathtub plug state detector that detects the open / closed state of the bathtub plug provided at the drain of the bathtub;
A water flow detection unit for detecting circulation of hot water in a circulation circuit connected to the bathtub;
If the bathtub plug state detection unit does not detect the closed state of the bathtub plug when the closing operation of the bathtub plug is instructed, the hot water of the bathtub with the first reference hot water amount smaller than the set amount of hot water is set. Instruct the beam, and then instruct the circulation of hot water in the circulation circuit, and then, if the water flow detector detects the circulation of the hot water, instruct the hot water in the bathtub to the set amount of hot water And when the water flow detection unit does not detect the circulation of hot water, a control unit for instructing to stop the hot water in the bathtub,
Hot water heater equipped with.   2. The water heater according to claim 1, wherein, when the water flow detection unit does not detect circulation of hot water, the control unit causes the notification unit to notify information for confirming an open / closed state of the bathtub tap.   When the water flow detection unit does not detect the circulation of hot water, the control unit instructs the closing operation of the bathtub plug before notifying the notification unit of information prompting confirmation of the open / close state of the bathtub plug. Item 3. A water heater according to item 2.   The control unit instructs the closing operation of the bathtub plug in a state where there is no track record of closing the bathtub plug, and when the bathtub plug state detection unit does not detect the closed state of the bathtub plug, the first reference The hot water supply device according to claim 2 or 3, wherein the notification unit is notified of information prompting confirmation of connection with the bathtub stopper without instructing the hot water of the bathtub with the amount of hot water.   The water heater according to any one of claims 2 to 4, further comprising selection means for selecting whether or not to cooperate with the bathtub stopper.   When the control unit instructs the hot water of the bathtub without detecting the closed state of the bathtub tap, information indicating that the hot water of the bathtub is implemented without detecting the closed state of the bathtub tap The water heater according to any one of claims 2 to 5, wherein the external device is notified.   When the connection with the bathtub plug is not detected when the setting to cooperate with the bathtub plug is made, the control unit instructs the hot water of the bathtub regardless of the detection of the open / closed state of the bathtub plug. The water heater according to any one of claims 2 to 6.   The control unit, when instructing the hot water of the bathtub when the setting to cooperate with the bathtub tap is not made, to inform the notification unit information that prompts confirmation of the closed state of the bathtub tap, The informing unit is not notified of information prompting confirmation of the closed state of the bathtub tap when the hot water of the bathtub is instructed when the setting for cooperation with the bathtub tap is made. The hot water heater according to any one of 7.   The hot water supply apparatus according to any one of claims 2 to 8, wherein the control unit continues the hot water heating even when the open state of the bathtub tap is detected after starting the hot water heating of the bathtub.   After starting the hot water for the bathtub, the control unit provides information indicating that the bathtub tap is opened during the hot water for the bathtub when the open state of the bathtub tap is detected. The hot water supply device according to claim 9 to be notified.   The hot water heater according to any one of claims 2 to 10, wherein the control unit causes the notification unit to display information indicating an open / closed state of the bathtub tap.

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