JP6684581B2 - Bath hot water system - Google Patents

Description

  The present invention relates to a bath hot water supply system.

  Conventionally, when the hot water filling button provided on the remote controller is pressed, a function to supply a predetermined amount of hot water from the hot water supply device to the bathtub to fill the bathtub with hot water at the set temperature and to enable bathing ( A bath hot water system equipped with a so-called hot water filling function has been put to practical use. As a bath hot water supply system having such a water filling function, a system for giving advance notice is also proposed. For example, the system of Patent Document 1 calculates the time required to complete the filling of water this time on the basis of the actual time required for filling the water, and when the remaining time of filling the water reaches a predetermined time (5 minutes left), You can take a bath in 5 minutes. "

JP, 2000-146290, A

  The technique disclosed in Patent Document 1 predicts the completion time of the filling of the present time based on the time required from the start to the completion of the previous filling of the water and determines the timing of the advance notice based on this. However, if the timing of the advance notice is determined by this method, if the assumed basic conditions change (for example, hot water is used in the kitchen etc. while the hot water is being filled and the water pressure of the hot water for the hot water filling is changed). , Or when hot water was left in the bathtub before the start of filling, etc.), the actual time interval from the advance notification to the completion of the filling will be different from the time interval notified by the advance notification. There is a problem that the user feels uncomfortable. In particular, in the case of the water filling method in which the amount of hot water boiled in the hot water supply circuit is dropped into the bathtub by the amount necessary for hot water filling, and the circulation circuit heats the hot water in the bathtub to the preset temperature to raise the set temperature, The degree to which water affects the temperature rise during circulation heating when there is water in the bathtub at the stage and when there is no water depends largely on the amount of water present and the size of the bathtub. obtain. In other words, if the technique of Patent Document 1 is applied to such a filling method, there will be a large variation in the time required from the start of filling to the completion of filling. There is a problem that it is difficult to give an accurate notice because the time interval is likely to deviate from the expected time interval.

  The present invention has been made to solve the above-mentioned problems, and the time interval from the previous notification to the subsequent notification is less likely to vary, and it is possible to more accurately convey the progress of the filling process. The object is to provide a bath hot water supply system that can be used.

The hot water supply system of the present invention is
A hot water supply side water passage for passing water introduced from the outside, a hot water supply side burner, and a hot water supply side heat exchanger for boiling water by transferring heat generated in the hot water supply side burner to water passing through the hot water supply side water passage. A hot water supply side circuit that has,
A circulation path configured such that one end side and the other end side are in communication with each other in the bathtub and water that has flowed out of the bathtub is returned to the bathtub, a burner on the bath side, and water passing through the circulation path to the bath. A bath side circuit having a bath side heat exchanger that transfers heat generated in the side burner;
A communication passage serving as a passage for passing hot water from the hot water supply side water passage of the hot water supply side circuit to the circulation path of the bath side circuit;
A bath water temperature detection unit for detecting the water temperature in the bath,
A remote controller having at least one operation section used for inputting a hot water filling instruction and a set temperature for filling a predetermined amount of hot water in the bathtub; and a voice output section for emitting a voice,
Communication with the remote controller and control for the hot water supply side circuit and the bath side circuit are performed at least, and in the bathtub when the filling instruction is input by the operation unit of the remote controller. The hot water supply side circuit is operated so as to store the predetermined amount of hot water, and the hot water in the bathtub is circulated in the circulation path at least after the predetermined amount of hot water is stored in the bathtub while the bath side heat exchanger is being circulated. a hot water filling control unit to operate the bath side circuit to heat, Ru stops the operation of the bath side circuit when a said set temperature by,
The said sound output unit of the remote controller before the water temperature in said bath by operation of Oite the bath side circuit when hot water is less than the set temperature has accumulated the predetermined amount in the bath is the set temperature A notification control unit that causes the sound output unit to perform the second notification when the water temperature in the bathtub reaches the set temperature.
Equipped with.

  In the present invention, the notification control unit causes the voice output unit of the remote controller to perform the first notification when the predetermined amount of hot water below the set temperature is stored in the bathtub, and the water temperature in the bathtub reaches the set temperature. The audio output unit to perform the second notification. According to this configuration, the first notification allows the user to accurately recognize that a predetermined amount of hot water below the set temperature has been stored in the bathtub, and the first notification notifies the user that the hot water It is possible to accurately grasp that the tension is in the final stage (the stage in which a predetermined amount of hot water is stored and heated to the set temperature). After that, when the water temperature in the bathtub reaches the set temperature, the second notification is given, so that the user can accurately grasp the completion of the filling of the water. In particular, since the time interval between the first notification and the second notification is the time interval until a predetermined amount of hot water reaches the set temperature by circulation heating, it is performed after the previous notification. The bath hot water supply system is capable of more accurately reporting the progress of filling with water, because the time interval until notification is not greatly varied.

  In the present invention, the first notification may be an audio notification notifying the arrival of the time of completion of the filling, and the second notification may be an audio notification notifying that the filling is completed.

  In this way, if the first notification is given by the voice notification notifying that the completion time of the filling of water is reached, the completion time of the filling of water is reached even if the user is away from the remote controller. It becomes easier to more accurately and more surely recognize (the water filling is in the final stage) by voice. Then, even when the filling of water is completed, the sound can be surely recognized. In particular, the user is less likely to erroneously recognize a state where a predetermined amount has been stored in the bathtub (a state nearing the completion time of the filling) and a state where the temperature has reached the set temperature (a completion state of the filling). It is possible to more accurately convey the progress of filling.

  The present invention may include a residual water amount detection unit that detects the residual water amount in the bathtub. Then, when the water filling instruction is input by the operation unit of the remote controller, the water filling control unit detects the remaining water in the bathtub by the remaining water amount detection unit, and detects the remaining water amount in the bathtub detected by the remaining water amount detection unit. The hot water supply amount is calculated based on the remaining water amount and the predetermined amount, and the hot water supply side circuit is operated so that the hot water supply amount of the hot water supply amount is supplied from the hot water supply side circuit to the bathtub. After that, the bath side circuit may be operated so that the hot water in the bathtub is circulated in the circulation path and heated by the bath side heat exchanger. Then, the notification control unit may be configured to perform the first notification when a shortage of hot water is replenished in the bathtub.

  In this way, the remaining water amount in the bathtub is detected by the remaining water amount detection unit, and the insufficient hot water amount is calculated based on the detected "remaining water amount" in the bathtub and the target "predetermined amount". If the hot water supply side circuit is operated so as to supply the hot water from the hot water supply side circuit to the bathtub, even if there is residual water in the bathtub, it is possible to more accurately understand that a predetermined amount of hot water has been stored in the bathtub. Easier to do. That is, even when there is residual water in the bathtub, the first notification can be accurately made without significantly deviating from the time when a predetermined amount of hot water is stored in the bathtub. The time interval from the notification of the above to the second notification of the later is largely prevented from varying.

FIG. 1 is a schematic circuit diagram illustrating a bath hot water supply system according to a first embodiment. FIG. 2 is a block diagram schematically illustrating a controller and a remote controller included in the bath hot water supply system according to the first embodiment. FIG. 3 is a front view schematically showing a state where the cover is opened in the first remote controller of the bath hot water supply system according to the first embodiment. FIG. 4 is a flowchart illustrating a flow of automatic hot water filling control performed in the bath hot water supply system according to the first embodiment.

<Example 1>
Embodiment 1 showing an example of the invention will be described below with reference to the drawings.
(Basic configuration)
A hot water supply system 1 shown in FIG. 1 is configured as a bath / hot water supply system having a function of supplying hot water to a bathtub and a function of heating water in the bathtub, and mainly includes a hot water supply side circuit 2 and a bath side circuit 3. The hot water supply side circuit 2 includes a water inlet pipe 12, a hot water discharge pipe 10, a gas burner 4 (hot water supply side burner), a heat exchanger 6 (hot water supply side heat exchanger), etc., and is a route for heating tap water supplied from the outside and discharging it. Function as. The bath-side circuit 3 is equipped with a gas burner 54 (bath-side burner), a heat exchanger 56 (bath-side heat exchanger), a pipe 66, a circulation pump 62, thermistors 64, 65, and the like, and circulatory heating during automatic water filling, It is used for additional cooking in the bath.

  In the hot water supply side circuit 2, a pipe line constituted by the water inlet pipe 12, the heat transfer pipe 8a, the pipe 20, the heat transfer pipe 7a, and the hot water discharge pipe 10 functions as a hot water supply side water passage. The water inlet pipe 12 is configured as a path through which water from the water inlet 16 flows, and the hot water outlet pipe 10 is configured as a path for sending hot water to the hot water outlet 18. The gas burner 4 corresponds to an example of a hot water supply side burner, and is a portion that burns combustion gas to generate combustion exhaust gas. The heat exchanger 6 corresponds to an example of a hot-water supply side heat exchanger, and water that passes through the hot-water supply side water passage (the water passage pipe 12, the heat transfer pipe 8a, the pipe 20, the heat transfer pipe 7a, and the hot water discharge pipe 10). Is a part for transferring the heat generated in the gas burner 4 to boil the hot water, which is provided in the middle of the hot water supply side water passage and is generated by the combustion in the gas burner 4 with respect to the water passing through the hot water supply side water passage. It functions to transfer heat. The heat exchanger 6 includes a primary heat exchanger 7 and a secondary heat exchanger 8. The primary heat exchanger 7 is arranged in the hot water supply combustion chamber 90 on the upstream side of the combustion exhaust path of the gas burner 4, and the secondary heat exchanger is provided. The exchanger 8 is arranged in the hot water supply combustion chamber 90 on the downstream side of the combustion exhaust path.

  In the hot water supply side circuit 2, a water inlet pipe 12 is connected to the inlet of the secondary heat exchanger 8 so as to supply tap water. The water inlet pipe 12 includes a thermistor 25 as a water temperature detection unit that detects the temperature of water passing through the water inlet pipe 12 (that is, the water temperature at a position upstream of the heat exchanger in the water passage pipe), and the water passage inside the water inlet pipe 12. A water amount sensor 34 is provided as a water amount detection unit that detects the amount of water (that is, the amount of water flowing through the water pipe). The heat transfer tube 8a of the secondary heat exchanger 8 is connected to the downstream side of the water inlet tube 12, and the heat transfer tube 8a of the secondary heat exchanger 8 and the heat transfer tube 7a of the primary heat exchanger 7 are further downstream thereof. A pipe 20 for connecting and is connected. The heat transfer pipe 7a of the primary heat exchanger 7 is connected with the structure connected to the pipe 20, and the hot water heated by the primary heat exchanger 7 is discharged at the outlet of the primary heat exchanger 7 from the hot water discharge pipe 10 Are connected. The tap pipe 10 is provided with a thermistor 26 that detects the temperature of the water in the tap pipe 10. In this configuration, the water inlet pipe 12, the heat transfer pipe 8a, the pipe 20, the heat transfer pipe 7a, and the hot water discharge pipe 10 correspond to an example of the water flow pipe, and the water introduced from a water supply (not shown) provided outside the hot water supply system 1 is passed through. Functions as a flow path.

  The heat exchanger 6 functions to recover the sensible heat of the combustion exhaust gas by the primary heat exchanger 7 and then recover the latent heat by the secondary heat exchanger 8. Specifically, the primary heat exchanger 7 is equipped with a heat transfer tube 7a that serves as a water passage in the primary heat exchanger 7, and the combustion exhaust gas generated by the gas burner 4 with respect to the water passing through the heat transfer tube 7a is removed. The contained heat of combustion is transferred, and the heat energy of sensible heat is transferred to the water for heat exchange. Further, the secondary heat exchanger 8 is provided with a heat transfer tube 8a which serves as a water passage in the secondary heat exchanger 8, and the combustion exhaust gas generated in the gas burner 4 is primary with respect to the water passing through the heat transfer tube 8a. Combustion heat after passing through the heat exchanger 7 is transferred, and heat is exchanged so that latent heat energy is transferred to water.

  A bypass passage 14 configured as a water passage different from the heat exchanger 6 is provided as a water passage that bypasses between the water inlet pipe 12 and the hot water outlet pipe 10. The bypass passage 14 is provided with a bypass valve 32 capable of shifting between a closed state in which water passage through the bypass passage 14 is blocked and an open state in which the opening degree is larger than the closed state. In the water inlet pipe 12, a water flow rate control valve 33 is provided on the upstream side of the branch position where the bypass passage 14 is connected. The water flow rate control valve 33 includes a motor in which the rotation angle of the drive shaft is controlled in response to an instruction from the controller 22, and the water inlet pipe 12 is continuously changed to various opening degrees between a closed state and a fully opened state. It can be configured. In this configuration, the water flow rate control valve 33 functions to adjust the amount of water flowing through the water flow pipe.

  The gas pipe 40 that supplies gas to the gas burner 4 includes a gas source solenoid valve 42, a hot water supply gas proportional control valve 44, and hot water supply switching solenoid valves 46, 46 for each branch pipe to each gas burner 4 from the upstream side. They are provided respectively. Further, below the hot water supply combustion chamber 90, there is provided a fan 48 for supplying combustion air to each gas burner 4 (hot water supply burner) and gas burner 54 (bath burner). A switching solenoid valve 53 is provided in a branch pipe from a gas pipe connected to the gas burner 54 (bath burner). The hot-water supply gas proportional control valve 44 and the hot-water supply switching solenoid valve 46 function to adjust the amount of gas to the gas burner 4.

  In the bath-side circuit 3, a pipe 66 is a forward pipe 67 for guiding water from the bath 60 side to the heat exchanger 56 side, and a return pipe 67 for guiding water from the heat exchanger 56 side to the bath 60 side. A pipe 68 and an intermediate pipe 69 connected to the outflow pipe 67 and the return pipe 68 and passing through the inside of the heat exchanger 56 are provided. The pipe 66 corresponds to an example of a circulation path, and has one end side and the other end side that communicate with the inside of the bathtub 60, and are configured as a path that allows water that has flowed out of the bathtub 60 to return to the inside of the bathtub 60. The pipe 66 guides the water drawn from the bathtub 60 to the heat exchanger 56 through the outgoing pipe 67 during the additional cooking operation or the boiling operation, and the water passing through the heat exchanger 56 is returned to the bathtub 60 through the return pipe 68. It is a route to circulate so as to lead. The heat exchanger 56 corresponds to an example of a bath side heat exchanger, includes a bath primary heat exchanger 57 and a bath secondary heat exchanger 58, and uses a gas burner 54 (bath side) in water passing through a pipe 66 (circulation path). It functions to transfer the heat generated by the burner).

  The outgoing pipe 67 is arranged between the bathtub 60 and the bath secondary heat exchanger 58. The outgoing pipe 67 includes a circulation pump 62 and a thermistor 64 (bath which detects the temperature of water passing through the outgoing pipe 67). A thermistor) is provided. The thermistor 64 corresponds to an example of a bath water temperature detection unit, and functions to detect the water temperature of the water discharged from the bath 60 (that is, the water temperature in the bath 60). The circulation pump 62 is a device that causes the water in the pipe 66 to flow, and functions to draw water from the bath 60 side and discharge the drawn water toward the heat exchanger 56 side.

  The return pipe 68 is arranged between the bath primary heat exchanger 57 and the bath 60. The return pipe 68 is connected to a drop pipe 70 branched from the hot water supply pipe 10, and the drop pipe 70 is provided with a hot water supply solenoid valve 72 and a drop water amount sensor 74. Then, by opening the hot water supply solenoid valve 72 provided in the drop pipe 70, the hot water heated in the hot water supply side circuit 2 can be supplied to the bathtub 60. The water amount sensor 74 has a function of detecting the amount of water supplied to the bathtub 60 via the drop pipe 70.

  The drop pipe 70 corresponds to an example of a communication passage, and serves as a path for passing hot water from the hot water supply side water passage of the hot water supply side circuit 2 to the pipe 66 (circulation path) of the bath side circuit 3. Specifically, the drop pipe 70 branches from the hot water outlet pipe 10 and communicates with the outgoing pipe 67, and functions to guide the water heated by the heat exchanger 6 to the bathtub 60 through the hot water supply side water passage.

  The hot water supply system 1 is provided with the controller 22 shown in FIGS. 1 and 2. The controller 22 shown in FIG. 2 is configured as, for example, a control unit 22A configured as a known microcomputer or the like, a memory 22B configured as a known semiconductor memory or the like, and an interface for performing communication with the outside. And a communication unit 22C. The controller 22 is a device that functions as a control unit that controls the water amount adjusting unit and the gas amount adjusting unit described above, and is configured to be able to acquire signals from various sensors provided in the hot water supply side circuit 2 and the bath side circuit 3. Accordingly, various actuators provided in the hot water supply side circuit 2 and the bath side circuit 3 can be controlled.

  As shown in FIG. 2, the plurality of remote controllers 80 are arranged in a configuration capable of communicating with the controller 22 (control unit). In the example of FIGS. 1 and 2, as the plurality of remote controllers 80, a first remote controller 81 provided in the bathroom and a second remote controller 82 provided in a place different from the bathroom (for example, a kitchen) are provided. .

  As shown in FIG. 2, the first remote controller 81 is provided with a control unit 81A configured as a known microcomputer or the like, a display unit 81B configured as a liquid crystal display device, and a plurality of known switches such as push buttons. The operation unit 81C thus configured, a communication unit 81D that communicates with the controller 22 and the second remote controller 82, and an audio output unit 81E that includes a speaker that outputs audio. The operation unit 81C is a plurality of operation units used for at least an input operation for instructing a set temperature (hot water supply temperature), an input operation for instructing a predetermined energy-saving mode, and an input operation for instructing automatic filling of the bath 60. It is composed by. The appearance of the first remote controller 81 is as shown in FIG. 3, for example. The operation unit 81C includes operation buttons 91R, 91S, 91T, 91X, 91Y, a menu button 91U, an enter button 91W, an eco button 91Z, a power button 91A, and the like.

  The same applies to the second remote controller 82, which includes a control unit 82A configured as a known microcomputer and the like, a display unit 82B configured as a liquid crystal display device, and a plurality of known switches such as push buttons. An operation unit 82C, a communication unit 82D for transmitting a signal or the like generated by the remote controller 82 to the controller 22, and an audio output unit 82E including a speaker for outputting audio are provided.

  In the first remote controller 81, the operation mode and the setting mode are switched by operating the operation unit 81C. When the menu button 91U is pressed in the operation mode, the mode is switched to the setting mode, and the first predetermined operation (for example, the operation of pressing the menu button 91U a predetermined first number of times) is performed in the setting mode. Then, the mode is switched to a predetermined detailed mode (hot water supply temperature switching setting mode) in the setting mode. In the hot water supply temperature switching setting mode, when an input operation for instructing a set temperature (hot water supply temperature) is performed by the operation buttons 91X and 91Y, the temperature corresponding to the input operation is displayed in the hot water supply temperature display area 120, and the state thereof is displayed. When the confirm button 91W is pressed in, the hot water supply temperature is set to the displayed temperature. Then, the memory 22B (FIG. 2) stores information on the set temperature (hot water supply temperature) thus set.

  When the second predetermined operation (for example, the operation of pressing the menu button 91U a predetermined second number of times) is performed in the setting mode, the mode is switched to a predetermined detailed mode (a bath temperature switching setting mode) in the setting mode. In the bath temperature switching setting mode, when an input operation for instructing the bath temperature is performed by the operation buttons 91S and 91T, the temperature corresponding to the input operation is displayed in the bath temperature display area 122, and in that state, the enter button 91W When is pressed, the bath temperature Tb is set to the displayed temperature. Then, the memory 22B (FIG. 2) stores information on the set bath temperature Tb.

  The second remote controller 82 has the same configuration as the first remote controller 81 or has a simplified configuration, and the same settings as the first remote controller 81 can be made. The contents set on the one hand in both remote controllers 80 are mutually reflected.

(Automatic filling control)
The controller 22 performs automatic filling control in the flow shown in FIG. 4, for example. The controller 22 executes the automatic filling control shown in FIG. 4 after the power is turned on, and determines whether there is a filling instruction. For example, if an input operation for instructing automatic filling is performed on the operation unit of the first remote controller 81 (for example, pressing the automatic filling button 91R shown in FIG. 3), the process proceeds to Yes in S1. A standby state is entered until an input operation for instructing automatic filling is performed, and the determination of No is repeated in S1.

  When the process proceeds to Yes in S1, the controller 22 detects the residual water amount in the bathtub 60 (S2). In this configuration, as shown in FIG. 1, a water amount sensor 61 for detecting the amount of water in the bathtub 60 is provided, and in S2, the detection value output from the water amount sensor 61 is acquired to grasp the residual water amount Vx in the bathtub 60. To do. The water amount sensor 61 corresponds to an example of the remaining water amount detection unit.

  After detecting the residual water amount Vx in S2, the supply water amount Va supplied from the hot water supply side circuit 2 to the bathtub 60 is calculated (S3). In S3, the value (Vb-Vx) obtained by subtracting the residual water amount Vx detected in S2 from the preset set water amount Vb (final target water amount in the bathtub 60) is set as the supply water amount Va. When the residual water amount Vx detected in S2 is 0, the supply water amount Va becomes the set water amount Vb. The “set amount of water”, which is the target amount of water to be stored in the bathtub 60, corresponds to an example of the “predetermined amount”, and is, for example, the amount of hot water preset by the setting operation on the operation unit 81C and stored in the memory 22B of the controller 22. Has been done.

  After S3, a hot water supply operation of dropping hot water having the set hot water supply temperature Ta into the bathtub 60 through the drop pipe 70 (communication pipe) by the supplied water amount Va is performed. The hot water supply temperature Ta is a temperature preset by a setting operation on the operation unit 81C, for example, and is stored in the memory 22B of the controller 22. Specifically, after S3, a hot water supply operation of supplying hot water having the hot water supply temperature Ta from the hot water supply side circuit 2 to the pipe 66 via the drop pipe 70 is performed (S4). If the amount of hot water in the bathtub 60 has not reached the set amount of water (predetermined amount) (that is, if the amount of hot water from the hot water supply side circuit 2 has not reached the amount of supplied water Va), the determination of No is repeated in S5. Then, the hot water supply operation of S4 is continued. After S3, when the amount of hot water in the bathtub 60 reaches the set amount of water (predetermined amount) (that is, when the amount of hot water from the hot water supply side circuit 2 reaches the amount of supplied water Va), the process proceeds to Yes in S5.

  Specifically, after the input operation for instructing the automatic water filling (for example, the operation of pressing the automatic water filling button 91R shown in FIG. 3) is performed, the controller 22 causes the hot water supply solenoid valve 72 provided in the drop pipe 70. After the valve is opened, the automatic supply of hot water at the set hot water supply temperature Ta to the bathtub 60 through the drop pipe 70 (communication pipe) is performed until the amount of water detected by the drop water amount sensor 74 reaches the “supply water amount Va”. Execute drop control. When the amount of water detected by the drop water amount sensor 74 reaches the “supply water amount Va”, the process proceeds to Yes in S5, and in the process of S6, the hot water supply solenoid valve 72 is closed and the hot water supply side circuit 2 To stop the hot water supply operation from the bath side circuit 3. Then, the controller 22 outputs a first notification instruction for instructing the first notification to the remote controllers 81 and 82. When receiving the first notification instruction from the controller 22, the remote controller 81 causes the voice output unit 81E to perform the first notification. The first notification is, for example, a voice notification that issues a voice message to notify the arrival of the time of completion of the filling, such as "The filling will be completed soon." Similarly, when the remote controller 82 receives the first notification instruction from the controller 22, the remote controller 82 causes the audio output unit 82E to perform the first notification. This first notification is also a voice notification that issues a voice message, for example, "The filling of water will be completed soon." It should be noted that the first notification may be, for example, a notification for displaying a message notifying the arrival of the time when the filling of water is completed on the display unit of the remote controller 80, or may be a buzzer sound or a specific lamp display. Good.

  As described above, in the present configuration, the controller 22 corresponds to an example of the hot water filling control unit, and has a configuration in which at least communication with the remote controller 80 and control of the hot water supply side circuit 2 and the bath side circuit 3 are performed. When a hot water filling instruction is input from the operation unit 80 (operation unit 81C or operation unit 82C), the hot water supply side circuit 2 is operated so that a predetermined amount of hot water is stored in the bathtub 60. Specifically, when the water amount sensor 61 (remaining water amount detecting unit) detects the remaining water amount Vx in the bathtub 60 when the filling instruction is input, the remaining water amount in the bathtub 60 detected by the water amount sensor 61. The hot water supply amount (supply water amount Va) is calculated based on Vx and the predetermined amount (set water amount Vb), and the hot water supply side circuit 2 is operated so as to supply the insufficient hot water amount from the hot water supply side circuit 2 to the bathtub 60. .

  After the process of S6, a circulation heating operation is performed (S7). Specifically, the circulation pump 62 is operated, the hot water drawn from the bathtub 60 is guided to the heat exchanger 56 by the outflow pipe 67, and the water passing through the heat exchanger 56 is guided to the bathtub 60 by the return pipe 68. Circulate. While circulating the hot water by operating the circulation pump 62 in this manner, the combustion gas is burned by the gas burner 54 (bath side burner) to generate combustion exhaust, and the heat exchanger 56 (bath side heat exchange). It heats the water passing through the inside of the pipe 66 so as to transfer the heat generated by the combustion in the gas burner 54. After such circulation heating is started, it is determined whether or not the temperature detected by the thermistor 64 (bath water temperature detection unit) (the temperature of the bath 60) has reached the set temperature (the preset bath temperature Tb). If not reached, the determination of No in S8 is repeated, and the circulation heating operation started in S7 is continued. The set temperature (float temperature Tb) may be the same as or different from hot water supply temperature Ta of hot water supply side circuit 2.

After the circulation heating operation is started in S7, if the temperature detected by the thermistor 64 (bath water temperature detection unit) (the temperature of the bath 60) reaches the set temperature (bath temperature Tb), Yes is obtained in S8.
Then, the circulation heating operation is stopped and the second notification is given. In the process of S9, the controller 22 stops the operation of the circulation pump 62, stops the combustion of the gas burner 54, and closes the switching electromagnetic valve 53. Then, the controller 22 outputs a second notification instruction for instructing the second notification to the remote controllers 81 and 82. When receiving the second notification instruction from the controller 22, the remote controller 81 causes the voice output unit 81E to perform the second notification. The second notification is, for example, a voice notification that issues a voice message to notify the completion of the filling such as "filling is completed". Similarly, when the remote controller 82 receives the second notification instruction from the controller 22, the remote controller 82 causes the audio output unit 82E to perform the second notification. This second notification is also a voice notification that issues a voice message such as "filling is completed". It should be noted that the second notification may be, for example, a notification for displaying a message indicating that the filling of water is completed on the display unit of the remote controller 80, a buzzer sound, a specific lamp display, or the like. When the process of S9 ends, the automatic filling control of FIG. 4 ends.

  In this configuration, the control units 22A, 81A, and 82A correspond to the notification control unit, and when the hot water below the set temperature (the bath temperature Tb) is stored in the bathtub 60 by a predetermined amount (set water amount Vb), the sound of the remote controller 80 is output. It functions to cause the output unit to perform the first notification and to cause the audio output unit to perform the second notification when the water temperature in the bathtub 60 reaches the set temperature (bath temperature Tb).

The effects of this configuration will be illustrated below.
In the present configuration, the notification control unit causes the audio output unit of the remote controller 80 to perform the first notification when hot water having a temperature lower than the set temperature (bath temperature Tb) is stored in the bathtub 60 by a predetermined amount. When the water temperature reaches the set temperature (bath temperature Tb), the audio output unit is caused to perform the second notification. According to this configuration, the first notification allows the user to accurately recognize that a predetermined amount of hot water below the set temperature (the bath temperature Tb) has been stored in the bathtub 60, and the user can make the first notification. By the notification of No. 1, it is possible to accurately grasp that the filling is in the final stage (the stage in which a predetermined amount of hot water is stored and is boiled up to the set temperature (bath temperature Tb)). After that, when the water temperature in the bathtub 60 reaches the set temperature (float temperature Tb), the second notification is given, so that the user can accurately grasp the completion of the filling of water. In particular, since the time interval between the first notification and the second notification is the time interval until a predetermined amount (set amount of hot water) of hot water reaches the set temperature by circulation heating, The bath hot water supply system is capable of more accurately reporting the progress of hot water filling, since the time interval until later notification is less likely to vary.

  In the present configuration, the first notification is an audio notification notifying the arrival of the time of completion of the filling, and the second notification is an audio notification notifying that the filling is completed. In this way, if the first notification is given by the voice notification notifying the arrival of the completion time of the filling of water, the completion time of the filling of water is reached even when the user is away from the remote controller 80. It becomes easier to more accurately and more surely recognize the fact that the water filling is in the final stage by voice. Then, even when the filling of water is completed, the sound can be surely recognized. In particular, the user is less likely to erroneously recognize a state where a predetermined amount has been stored in the bathtub (a state nearing the completion time of the filling) and a state where the temperature has reached the set temperature (a completion state of the filling). It is possible to more accurately convey the progress of filling.

  The bath hot water supply system 1 of this configuration includes a water amount sensor 61 (remaining water amount detection unit) that detects the amount of remaining water in the bathtub 60, and the controller 22 corresponding to the hot water filling control unit is operated by the operation unit of the remote controller 80. When the amount of water remaining in the bathtub 60 is detected by the water amount sensor 61 (remaining water amount detecting unit) when the filling instruction is input, the amount of remaining water in the bathtub 60 detected by the water amount sensor 61 (remaining water amount detecting unit). The hot water supply amount (supply water amount Va) is calculated based on Vx and the predetermined amount (set water amount Vb), and the hot water supply side circuit 2 is operated so as to supply the insufficient hot water amount from the hot water supply side circuit 2 to the bathtub 60. . Then, after the hot water of the insufficient hot water amount (supply water amount Va) is replenished in the bathtub 60, the bath side circuit 3 is operated so that the hot water in the bathtub 60 is circulated in the circulation path and heated by the bath side heat exchanger. The control units 22A, 81A, 82A corresponding to the notification control unit are configured to perform the first notification when the bath water is replenished with the insufficient hot water amount (supply water amount Va).

  In this way, the remaining water amount in the bathtub 60 is detected by the water amount sensor 61 (remaining water amount detection unit), and the insufficient hot water amount is calculated based on the detected "remaining water amount" in the bathtub and the target "predetermined amount". Then, if the hot water supply side circuit 2 is operated so as to supply an insufficient amount of hot water from the hot water supply side circuit to the bathtub, a predetermined amount of hot water is stored in the bathtub even when there is residual water in the bathtub. It will be easier to understand what is happening. That is, even when there is residual water in the bathtub, the first notification can be accurately made without significantly deviating from the time when a predetermined amount of hot water is stored in the bathtub. The time interval from the notification of the above to the second notification of the later is largely prevented from varying.

<Other Examples>
Various modifications may be added to the above-described embodiment, and various configurations may be added. Another embodiment will be briefly described below.

  In the above-described embodiment, an example of performing an input operation for instructing the automatic operation of filling the operation portion 81C of the first remote controller 81 is shown. However, the operation portion 82C of the second remote controller 82 is instructed to perform the automatic filling operation. The input operation may be performed.

  In the above-described embodiment, the example in which the circulation heating operation is performed after the predetermined amount of hot water is stored in the bathtub 60 is shown. However, the circulation heating operation is performed slightly before the predetermined amount of hot water is stored in the bathtub 60. Good. In this case, the first notification is given after the circulation heating operation is started.

1 ... Bath hot water supply system 2 ... Hot water supply side circuit 3 ... Bath side circuit 4 ... Gas burner (hot water supply side burner)
6 ... Heat exchanger (hot water supply side heat exchanger)
7a, 8a ... Heat transfer tubes (hot water supply side water passage)
10: Hot water outlet pipe (hot water supply side water passage)
12 ... Inlet pipe (hot water supply side water passage)
20 ... Piping (Hot water side water passage)
22 ... Controller (filling control unit, notification control unit)
54 ... Gas burner 54 (bath burner)
56 ... Heat exchanger (bath side heat exchanger)
60 ... Bathtub 61 ... Water amount sensor (remaining water amount detection unit)
64 ... Thermistor (bath water temperature detector)
66 ... Piping (circulation path)
70 ... Drop pipe (communicating passage)
80 ... Remote controller 81A, 82A ... Control unit (notification control unit)
81C, 82D ... Operation section 81E, 82E ... Audio output section

Claims (3)

A hot water supply side water passage for passing water introduced from the outside, a hot water supply side burner, and a hot water supply side heat exchanger for boiling water by transferring heat generated in the hot water supply side burner to water passing through the hot water supply side water passage. A hot water supply side circuit that has,
A circulation path configured such that one end side and the other end side are in communication with each other in the bathtub and water that has flowed out of the bathtub is returned to the bathtub, a burner on the bath side, and water passing through the circulation path to the bath. A bath side circuit having a bath side heat exchanger that transfers heat generated in the side burner;
A communication passage serving as a passage for passing hot water from the hot water supply side water passage of the hot water supply side circuit to the circulation path of the bath side circuit;
A bath water temperature detection unit for detecting the water temperature in the bath,
A remote controller having at least one operation section used for inputting a hot water filling instruction and a set temperature for filling a predetermined amount of hot water in the bathtub; and a voice output section for emitting a voice,
Communication with the remote controller and control for the hot water supply side circuit and the bath side circuit are performed at least, and in the bathtub when the filling instruction is input by the operation unit of the remote controller. The hot water supply side circuit is operated so as to store the predetermined amount of hot water, and the hot water in the bathtub is circulated in the circulation path at least after the predetermined amount of hot water is stored in the bathtub while the bath side heat exchanger is being circulated. a hot water filling control unit to operate the bath side circuit to heat, Ru stops the operation of the bath side circuit when a said set temperature by,
The said sound output unit of the remote controller before the water temperature in said bath by operation of Oite the bath side circuit when hot water is less than the set temperature has accumulated the predetermined amount in the bath is the set temperature A notification control unit that causes the sound output unit to perform the second notification when the water temperature in the bathtub reaches the set temperature.
Bath hot water supply system equipped with.   The bath hot water supply system according to claim 1, wherein the first notification is a voice notification for notifying that the time of completion of filling is completed, and the second notification is a voice notification for notifying that filling is completed. A residual water amount detection unit for detecting the residual water amount in the bath,
The water filling controller detects the remaining water amount detecting unit when the remaining water amount detecting unit detects the remaining water in the bathtub when the water filling instruction is input by the operation unit of the remote controller. Calculate the shortage hot water amount based on the remaining amount of water in the bathtub and the predetermined amount, and operate the hot water supply side circuit to supply hot water of the shortage hot water amount from the hot water supply side circuit to the bathtub, At least the bath-side circuit is operated so as to be heated by the bath-side heat exchanger while circulating the hot-water in the bathtub in the circulation path after at least the hot-water amount in the bathtub is replenished,
The bath hot water supply system according to claim 1 or 2, wherein the notification control unit performs the first notification when the insufficient hot water is replenished in the bathtub.