JP2020186886A - Hot water supply device - Google Patents

Abstract

To provide a hot water supply device capable of enhancing convenience at the time of resuming hot water supply operation of heating hot water supply water to be supplied to a hot water supply target part after using hot water left in a hot water supply path.SOLUTION: When a predetermined operation is executed on an operation terminal 40 or 50, a control device 30 of a hot water supply device 1 prohibits a heat source machine 2 from heating hot water supply water to be supplied to a hot water supply target part 20, and then when predetermined release conditions (conditions that the number of hot water supplies and an elapsed time reach a predetermined value, etc.) that do not depend on the operation of the operation terminal 40 or 50 are satisfied, cancels the prohibition on heating of hot water supply water by the heat source machine 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hot water supply device.

In a water heater, for example, as seen in Patent Document 1, after executing a hot water supply operation in which hot water for hot water supply to a hot water supply target part such as a faucet is heated by a heat source machine, the hot water supply path from the heat source machine to the hot water supply target part It is known that the remaining hot water can be used effectively.

In the hot water supply device seen in Patent Document 1, after the hot water supply operation is completed, water is passed to the hot water supply target portion in a state where the operation switch of the remote control of the hot water supply device is turned off, so that the water for hot water supply in the heat source machine is used. The hot water remaining in the hot water supply channel is supplied to the hot water supply target portion without heating. Then, in this case, the amount of hot water remaining in the hot water supply channel is displayed by the remote controller.

Japanese Unexamined Patent Publication No. 2002-188861

In the technique seen in Patent Document 1, the operation switch of the remote controller is turned off in order to supply the hot water remaining in the hot water supply path to the hot water supply target portion without heating the hot water supply water by the heat source machine. There is. In this case, in order to restart the hot water supply operation for heating the hot water supply water in the heat source machine, it is necessary to turn on the operation switch of the remote controller.

However, the user forgets to turn on the operation switch of the remote controller after using the hot water remaining in the hot water supply passage, and the user or another user restarts the hot water supply operation while the operation switch remains OFF. It is easy for water to start flowing to the hot water supply target area. Then, in this case, the user notices that the operation switch is turned off, and until the operation switch is turned on, unheated hot water supply water is supplied to the hot water supply target portion, which is not suitable for the user. It is easy to give a pleasant feeling.

The present invention has been made in view of this background, and it is possible to enhance the convenience when restarting the hot water supply operation for heating the hot water supply water supplied to the hot water supply target portion after using the hot water remaining in the hot water supply channel. The purpose is to provide a water heater.

In order to achieve the above object, the hot water supply device of the present invention includes a heat source machine that heats the supplied hot water supply water to discharge hot water, a hot water supply channel that supplies hot water supply water discharged from the heat source machine to a hot water supply target portion, and the like. A hot water supply device including an operation terminal configured to be able to perform operations related to the operation of the heat source machine and a control device having a function of controlling the operation of the heat source machine.
The control device prohibits the heat source machine from heating the hot water supply water supplied to the hot water supply target unit when a predetermined operation is executed by the operation terminal, and thereafter, the control device does not depend on the operation of the operation terminal. When the release condition of the above is satisfied, the heat source machine is configured to release the prohibition of heating of the hot water supply water (first invention).

According to the first invention, when the user executes a predetermined operation on the operation terminal, it is prohibited to heat the hot water supply water supplied to the hot water supply target portion by the heat source machine. Therefore, the hot water supply water to the hot water supply target portion is prohibited. When the water is passed through, the hot water remaining in the hot water supply channel (heated hot water supply water) can be supplied to the hot water supply target portion and used without heating the hot water supply water by the heat source machine. Therefore, the energy saving effect of the hot water supply device can be enhanced.

After that, when a predetermined release condition that does not depend on the operation of the operation terminal is satisfied, the prohibition of heating of the hot water for hot water supply by the heat source machine is released, so that the user cancels the prohibition of the heating on the operation terminal. It is possible to operate the heat source machine so as to heat the hot water supply water supplied to the hot water supply target portion without performing the above operation.

Therefore, according to the present invention, it is possible to enhance the convenience when restarting the hot water supply operation for heating the hot water supply water supplied to the hot water supply target portion after using the hot water remaining in the hot water supply channel.

In the first invention, the control device determines whether or not residual hot water warmed by heating by the heat source machine remains in the hot water supply path when the predetermined operation is executed by the operation terminal. However, on the condition that the result of the determination is positive, it may be configured to prohibit heating of the hot water supply water supplied to the hot water supply target portion by the heat source machine (second invention).
According to this, in a situation where it is determined that the remaining hot water does not remain in the hot water supply passage even if the predetermined operation is performed on the operation terminal, the hot water supply water supplied to the hot water supply target portion is heated by the heat source machine. Is not prohibited, so that warm water for hot water supply heated by the heat source machine can be supplied to the hot water supply target portion even after the execution of the predetermined operation.

In the first invention or the second invention, the control device has a function of counting the number of times the hot water supply water is supplied to the hot water supply target portion after prohibiting the heating of the hot water supply water by the heat source machine. The predetermined release condition may employ an aspect including a condition that the number of times of supply reaches a predetermined number of times (third invention).

According to this, after the heating of the hot water supply water by the heating source is prohibited, the heating of the hot water supply water by the heat source machine is prohibited until the number of times of supply of the hot water supply water to the hot water supply target portion reaches a predetermined number. The hot water remaining in the hot water supply channel can be supplied to the hot water supply target portion for use. Then, after the number of times the hot water supply water is supplied to the hot water supply target portion reaches a predetermined number of times, the prohibition of heating the hot water supply water is automatically lifted without the need to operate the operation terminal, so that the hot water supply water is heated. It is possible to smoothly restart the operation of the heat source machine as if it were done.

Further, in the first invention or the second invention, the control device has a function of measuring the elapsed time after prohibiting the heating of the hot water supply water by the heat source machine, and the predetermined release condition is: It is also possible to adopt an embodiment including the condition that the elapsed time reaches a predetermined time (4th invention).

According to this, until the elapsed time after the heating of the hot water supply water by the heat source is prohibited reaches a predetermined time, the hot water remaining in the hot water supply channel is supplied with the heating of the hot water supply water by the heat source machine prohibited. It can be supplied to the target part and used. Then, after the elapsed time reaches a predetermined time, the prohibition of heating the hot water supply water is automatically lifted without the need to operate the operation terminal, so that the heat source machine is operated so as to heat the hot water supply water. Can be smoothly resumed.

Further, in the first invention or the second invention, the control device has a function of integrating the amount of hot water supply to the hot water supply target portion after prohibiting the hot water supply water from being heated by the heat source machine. However, the predetermined release condition may include a condition that the integrated value of the supply amount reaches a predetermined value and the supply of hot water for hot water supply to the hot water supply target portion is stopped (the first aspect). 5 inventions).

According to this, after the heating of the hot water supply water by the heating source is prohibited, the integrated value of the supply amount of the hot water supply water to the hot water supply target part reaches a predetermined value, and the supply of the hot water supply water to the hot water supply target part is stopped. Until the condition is satisfied, the hot water remaining in the hot water supply channel can be supplied to the hot water supply target portion and used in a state where heating of the hot water supply water by the heat source machine is prohibited. Then, after the above conditions are satisfied, the prohibition on heating the hot water supply water is automatically lifted without the need to operate the operation terminal, so that the heat source machine is operated so as to heat the hot water supply water. Can be restarted smoothly.

Further, in the first to fifth inventions, the operation terminal may be a remote controller. In this case, the operation terminal has a display unit capable of displaying the set value of the target temperature of the hot water supply water supplied from the heat source machine to the hot water supply target unit, and displays the set value of the target temperature on the display unit. When it has a normal mode and a save mode in which the set value of the target temperature is not displayed on the display unit, it is configured to shift from the normal mode to the save mode when the predetermined release condition is satisfied. (6th invention).

Here, when the hot water remaining in the hot water supply channel is supplied to the hot water supply target portion in a state where the heating of the hot water supply water by the heat source machine is prohibited, the hot water supply water is usually supplied for a while after that. It is not required to operate the heat source machine to heat it. Therefore, in the fifth invention, the remote controller is configured to shift from the normal mode to the save mode when the predetermined release condition is satisfied. Therefore, it is possible to reduce the power consumption of the remote controller by the save mode at an appropriate timing.

The figure which shows the whole structure of the hot water supply apparatus of embodiment of this invention. The flowchart which shows the control process concerning the operation control of the heat source machine of the hot water supply device of embodiment. The flowchart which shows ON / OFF setting processing of the residual hot water utilization mode in 1st Embodiment. A timing chart for explaining the operation of the hot water supply device of the first embodiment. The flowchart which shows ON / OFF setting processing of the residual hot water utilization mode in 2nd Embodiment. A timing chart for explaining the operation of the hot water supply device of the second embodiment. The flowchart which shows ON / OFF setting processing of the residual hot water utilization mode in 3rd Embodiment. A timing chart for explaining the operation of the hot water supply device of the third embodiment. The flowchart which shows the setting process of ON / OFF of the residual hot water utilization mode in 4th Embodiment.

[First Embodiment]
The first embodiment of the present invention will be described below with reference to FIGS. 1 to 4B. With reference to FIG. 1, the hot water supply device 1 of the present embodiment includes a heat source machine 2 capable of performing an operation of heating hot water for hot water supply to discharge hot water (hereinafter referred to as a hot water supply heating operation). In the heat source machine 2, a water supply channel 10 for supplying hot water such as tap water to the heat source machine 2 and hot water for hot water (hot water) heated in the heat source machine 2 are supplied to a hot water supply target portion 20 such as a kitchen or a bathroom. It is connected to the hot water supply channel 11.

A heating device 12 for heating the hot water supply water supplied by the water supply channel 10 is mounted in the heat source machine 2. The heating device 12 is a combustion type heating device, and has a burner 13 as a heating unit, a heat exchanger 14 heated by the combustion heat of the burner 13, and the inside (combustion) of these burners 13 and the heat exchanger 14. It is provided with a combustion casing 15 housed in a chamber). An electric combustion fan 16 that supplies combustion air to the burner 13 is attached to the combustion casing 15. Further, an exhaust passage 15a for leading out the combustion exhaust gas generated by the combustion operation of the burner 13 to the outside is connected to the combustion casing 15.

The burner 13 is, for example, a gas burner. Two solenoid valves 17a and 17b that can open and close the fuel supply passage 17 that supplies fuel gas to the burner 13 and a fuel adjustment valve 17c that adjusts the amount of fuel gas supplied to the burner 13 are attached. ing. The fuel regulating valve 17c may be composed of, for example, a proportional valve, an electric control valve, or the like.

In the heating device 12 having the above configuration, the burner 13 is ignited by operating the ignition device (not shown) while operating the combustion fan 16 and controlling the opening of the solenoid valves 17a and 17b. Then, during the combustion operation of the burner 13, by controlling the fuel adjusting valve 17c and the rotation speed of the combustion fan 16, the supply amount of fuel and combustion air to the burner 13 is adjusted, and by extension, the burner 13 is used. The amount of combustion (heat power) is adjusted. Further, by controlling the closing of at least one of the solenoid valves 17a and 17b, the fuel supply to the burner 13 is cut off, and the burner 13 is extinguished.

The upstream side of the water supply channel 10 is connected to a pipe of a water supply source (not shown), and the downstream end of the water supply channel 10 is connected to the inflow port of the heat exchanger 14. Further, the upstream end of the hot water supply channel 11 is connected to the outlet of the heat exchanger 14, and the downstream side of the hot water supply channel 11 is branched into a plurality of locations such as a bathroom, a kitchen, and a washroom, and is arranged at each location. It is connected to each hot water supply target portion 20 (faucet in the illustrated example). The hot water supply target portion 20 is not limited to the faucet, and may be a device such as a dishwasher.

Further, a bypass passage 21 for passing hot water for hot water from the water supply passage 10 to the hot water supply passage 11 without passing through the heat exchanger 14 is branched from the water supply passage 10 and joins the hot water supply passage 11. Then, a bypass ratio adjusting valve 22 for adjusting the bypass ratio, which is the ratio of the water flow rate of the heat exchanger 14 to the water flow rate of the bypass path 21, is assembled at the connection portion between the water supply path 10 and the bypass path 21. It is attached. The bypass ratio adjusting valve 22 is composed of, for example, an electric three-way valve. The bypass path 21 and the bypass ratio adjusting valve 22 may be omitted. Further, the bypass ratio adjusting valve may be assembled, for example, at the connection portion between the hot water supply passage 11 and the bypass passage 21.

Further, a flow rate sensor 23 for detecting the flow rate of water flowing through the water supply channel 10 is assembled at a portion of the water supply channel 10 on the upstream side of the connection portion with the bypass path 21. Further, in the hot water supply passage 11, a temperature sensor 24 for detecting the temperature of the hot water supply water flowing out from the heat exchanger 14 is installed at a portion upstream of the connection portion with the bypass passage 21 to form a bypass passage 21. A temperature sensor 25 for detecting the hot water supply temperature, which is the temperature of the hot water supply water supplied to the hot water supply target unit 20, is installed at a location downstream of the connection portion.

The hot water supply device 1 further includes a control device 30 having a function of controlling the operation of the heat source machine 2, and a remote controller 40 installed in a kitchen, a bathroom, or the like as an operation terminal for a user to perform an operation related to the operation of the heat source machine 2. And. Further, in the hot water supply device 1 of the present embodiment, by installing a predetermined application on the communication terminal 50 such as a smartphone, a mobile phone, or a tablet terminal, the communication terminal 50 is used as an operation terminal for the hot water supply device 1. It is also possible.

The remote controller 40 controls a display unit 41 that displays various information related to the operation of the heat source machine 2, such as a set value of the target hot water supply temperature, an operation unit 42 composed of a plurality of operation switches, and display control of the display unit 41. It includes a remote control unit 43 having a function to perform the operation.

The display unit 41 is composed of, for example, a liquid crystal display, an organic EL display, an LED display, or the like. Further, the operation unit 42 does not operate the heating device 12 in order to use up the operation switch 42a for instructing the control device 30 to turn on / off the heat source machine 2 and the hot water remaining in the hot water supply path 11, for example. An operation mode that enables water to be passed through the water supply passage 10 and the hot water supply passage 11 (in other words, supply of hot water supply water to the hot water supply target portion 20) (without heating the hot water supply water by the heating device 12). A single-use switch 42b for instructing the control device 30 to turn on / off the remaining hot water utilization mode, a setting switch 42c for setting a target hot water supply temperature, and the like are included.

The ON state of the heat source machine 2 means a state in which the hot water supply heating operation of the heat source machine 2 is performed according to the water flow of the water supply passage 10 and the hot water supply passage 11 except for the ON state of the residual hot water utilization mode. The OFF state of the machine 2 means a state in which the heating device 12 is constantly maintained in the stopped operation state.

Further, the ON state and the OFF state of the remaining hot water utilization mode mean the valid state and the invalid state of the residual hot water utilization mode, respectively. In other words, the ON state of the residual hot water utilization mode is a state in which it is prohibited to heat the hot water supply water supplied to the hot water supply target unit 20 by the heating device 12, and the OFF state of the residual hot water utilization mode is in other words. , The hot water supply water supplied to the hot water supply target unit 20 is permitted to be heated by the heating device 12.

The remote control unit 43 is composed of an electronic circuit unit including, for example, a microcomputer, a memory, an interface circuit, a communication circuit, etc., and an operation signal of the operation unit 42 is input and communicates with the control device 30 (wired communication or wireless communication). It is possible to do. Further, the remote control unit 43 can also perform wireless communication with the communication terminal 50 that has activated the predetermined application (hereinafter, referred to as a hot water supply operation application).

Then, the remote control control unit 43 has, as a function realized by one or both of the mounted hardware configuration and the program (software configuration), the operating state of the heat source machine 2 given by the control device 30, the operation of the operation unit 42, and the like. It has a function of performing display control of the display unit 41 according to the above, a function of transmitting operation information given from the operation unit 42 or the communication terminal 50 to the control device 30, and the like.

Further, in the present embodiment, as the mode related to the display of the display unit 41, the remote controller 40 has a normal mode in which the set value of the target hot water supply temperature is displayed in the ON state of the heat source machine 2 and a water supply mode in the ON state of the heat source machine 2. In the situation where the water flow of the road 10 and the hot water supply passage 11 is stopped, in order to reduce the power consumption of the remote controller 40, a save mode in which the set value of the target hot water supply temperature is not displayed on the display unit 41 is set. Have. Then, the remote controller control unit 30 switches the display on the display unit 41 of the remote controller 40 from the normal mode to the save mode in response to an operation of an operation switch (not shown) of the operation unit 42, a command from the control device 30, or the like. Is possible.

Although only one remote controller 40 is shown in FIG. 1, the hot water supply device 1 may include a plurality of remote controllers. Further, the remote controller 40 may include a touch panel having both functions as a display unit 41 and an operation unit 42.

The communication terminal 50 can perform wireless communication with the remote control unit 43 by activating a pre-installed hot water supply operation application, and can also operate the touch panel 51 provided on the communication terminal 50 or the communication terminal 50. By inputting voice to the communication terminal 50 or the like, it is possible to perform the same operation as the operation with the remote controller 40 (operation operation of the heat source machine 2).

The control device 30 is composed of one or more electronic circuit units including, for example, a microcomputer, a memory, an interface circuit, a communication circuit, and the like, and is mounted on the heat source machine 2. The control device 30 receives detection signals of each sensor (flow sensor 23, temperature sensors 24, 25, etc.) provided in the heat source device 2 and communicates with the remote controller 40 (wired communication or wireless communication). It is possible.

The control device 30 has a function of controlling the operation of the heating device 12 of the heat source machine 2 (control of the combustion operation of the burner 13) as a function realized by the implemented hardware configuration and program (software configuration), bypass. It has a function of controlling the operation of the ratio adjusting valve 22 and the like. In this case, the operation control of the heating device 12 is performed through the operation control of the combustion fan 16, the solenoid valves 17a and 17b, the fuel adjusting valve 17c, and the ignition device (not shown). The control device 30 may be configured to perform wireless communication with the communication terminal 50 that has activated the hot water supply operation application without going through the remote controller 40.

Next, the operation of the hot water supply device 1 of the present embodiment will be described. In the present embodiment, the control device 30 executes the process shown in the flowchart of FIG. 2 in a state where the ON state of the heat source machine 2 is commanded by the operation of the operation switch 42a of the remote controller 40 or the operation of the communication terminal 50. To do.

In STEP 1, the control device 30 executes a process of determining whether or not there is water flow through the water supply channel 10 and the hot water supply channel 11 based on the water flow rate detected by the flow rate sensor 23. In this case, the control device 50 determines that there is water flow when the detected value of the water flow rate by the flow rate sensor 23 is the predetermined value W1 or more, and the detected value of the water flow rate is less than the predetermined value W1. Judges that there is no water flow. Then, when the determination result of STEP1 is negative (when it is determined that there is no water flow), the control device 30 sequentially repeats the determination process of STEP1.

When water flow through the water supply channel 10 and the hot water supply channel 11 (water flow at a flow rate of a predetermined value W1 or more) is started by opening the faucet as the hot water supply target portion 20, the judgment result of STEP 1 is positive. become. At this time, the control device 30 then determines in STEP 2 whether or not the residual hot water utilization mode is in the ON state. The residual hot water utilization mode is an operation mode set to an ON state (valid state) or an OFF state (invalid state) by a process described later executed by the control device 30 in parallel with the process of the flowchart of FIG.

Then, when the determination result of STEP2 is negative (when the residual hot water utilization mode is OFF), the control device 30 controls the operation of the heating device 12 so as to execute the hot water supply heating operation in STEP3. Do. In this STEP 3, the control device 30 ignites the burner 13 of the heating device 12, and then the hot water supply temperature detected by the temperature sensor 25 matches or substantially matches the target hot water supply temperature set by the remote controller 40 or the communication terminal 50. The combustion amount of the burner 13 and the bypass ratio are controlled so as to cause the combustion.

More specifically, the control device 30 is detected by the temperature sensor 25 based on the detection value of the water flow rate by the flow rate sensor 23, the temperature detection value by each of the temperature sensors 24 and 25, and the target hot water supply temperature. The target combustion amount and target bypass ratio of the burner 13 required to match or substantially match the actual hot water supply temperature with or substantially match the target hot water supply temperature are sequentially determined. Then, the fuel adjusting valve 17c and the rotation speed of the combustion fan 16 are controlled according to the determined target combustion amount, and the bypass ratio adjusting valve 22 is controlled according to the determined target bypass ratio.

Further, the control device 30 executes a process of determining in STEP 6 whether or not the water flow through the water supply channel 10 and the hot water supply channel 11 is stopped based on the water flow rate detected by the flow rate sensor 23. In this case, the control device 50 determines that the water flow has been stopped when the detected value of the water flow rate by the flow rate sensor 23 drops to the predetermined value W2 or less, and the detected value of the water flow rate exceeds the predetermined value W2. If so, it is judged that the water flow has not been stopped. Then, when the determination result of STEP 6 is negative (when it is determined that the water flow is not stopped), the control Prime Minister 30 repeats the process from STEP 2.

If the determination result of STEP2 is affirmative (when the residual hot water utilization mode is ON), the control device 30 then determines whether or not the hot water supply heating operation is being executed in STEP4 (burner). Whether or not the combustion operation of 13 is in progress) is determined. Then, when the determination result of STEP 4 is affirmative (when the hot water supply heating operation is being executed), the control device 30 stops the hot water supply heating operation in STEP 5 and then performs the determination process of STEP 6. Run. In this case, in STEP 5, the control device 30 shuts off the fuel supply to the burner 13 by controlling one or both of the solenoid valves 17b and 17c to be closed, thereby extinguishing the burner 13.

If the determination result of STEP 4 is negative (when the hot water supply heating operation is not being executed), the determination process of STEP 6 is executed while keeping the burner 13 in the fire extinguishing state.

When the water flow in the water supply channel 10 and the hot water supply channel 11 is stopped due to the closing of the faucet constituting the hot water supply target portion 20 or the like (the detected value of the water flow rate becomes a minute water flow rate of a predetermined value W2 or less). (Including the case), the judgment result of STEP6 becomes affirmative. At this time, the control device 30 then determines in STEP 7 whether or not the hot water supply heating operation is being executed (whether or not the burning operation of the burner 13 is being performed).

Then, when the determination result of STEP 7 is positive (when the hot water supply heating operation is being executed), the control device 30 then extinguishes the burner 13 in STEP 8 in the same manner as in STEP 5, thereby supplying hot water. After stopping the heating operation, the process from STEP 1 is restarted. If the determination result of STEP 7 is negative (when the hot water supply heating operation is not being executed), the control device 30 restarts the process from STEP 1 while keeping the burner 13 in the fire extinguishing state.

By the above processing, in the OFF state (invalid state) of the residual hot water utilization mode, the heating of the hot water supply water by the heating device 12 is permitted, so that the water flow through the water supply passage 10 and the hot water supply passage 11 (predetermined value W1). When water is passed at the above flow rate), the heating device 12 operates according to the water flow (combustion operation of the burner 3 is performed).

For example, in the period before time t2 or after time t3 in FIG. 4A, or in the period before time t7 or after time t9 in FIG. When water is applied, the heating device 12 is activated (combustion operation of the burner 13 is performed). Then, by the combustion operation of the burner 13, the hot water supply water flowing from the water supply channel 10 to the hot water supply channel 11 is heated to a temperature that matches or substantially matches the target hot water supply temperature, and the heated hot water supply water is used in any of the hot water supply target portions 20. Is supplied to.

The graphs in the first row (top row) of FIGS. 4A and 4B exemplify the change patterns of the presence or absence of water flow in the water supply channel 10 and the hot water supply channel 11, respectively, and the graphs in the second row are respectively. , The change pattern of ON / OFF of the residual hot water utilization mode is illustrated, and the graph of the third stage exemplifies the change pattern of the presence or absence of the operation of the heating device 12, respectively.

Further, in the ON state (effective state) of the residual hot water utilization mode, the heating of the hot water supply water by the heating device 12 is prohibited, so that the water flow through the water supply passage 10 and the hot water supply passage 11 (flow rate of the predetermined value W1 or more). The heating device 12 is maintained in the stopped state (the combustion operation of the burner 13 is not executed) even if the water is passed through the water heater.

For example, during the period of time t2 to t3 of FIG. 4A or the period of time t7 to t9 of FIG. 4B, the residual hot water utilization mode is in the ON state, so that even if water is passed through the water supply channel 10 and the hot water supply channel 11. The operation of the heating device 12 (combustion operation of the burner 13) is stopped or maintained in the stopped state.

In this case, if the hot water supply water (hot water) heated during the previous hot water supply heating operation remains in the hot water supply passage 11, the combustion operation of the burner 13 is performed immediately after the start of water flow to the hot water supply pair target portion 20. Is not executed, the remaining hot water remaining in the hot water supply passage 11 is supplied to the hot water supply target unit 20. As a result, the remaining hot water is effectively used.

The control device 30 sets ON / OFF of the residual hot water utilization mode by executing the process shown in the flowchart of FIG. 3 in parallel with executing the process shown in the flowchart of FIG. 2 as described above.

Specifically, in STEP 11, the control device 30 uses one of the remote controllers 40 or the communication terminal 50 (the communication terminal 50 in the state where the hot water supply operation application is activated) to turn on the residual hot water utilization mode (remaining hot water utilization mode). It is determined whether or not the operation (operation to turn on) has been performed. Then, when the determination result of STEP 11 is negative, the control device 30 sequentially repeats the determination process of STEP 11.

When the user wishes to use up the hot water remaining in the hot water supply passage 11, the user performs an ON operation of the remaining hot water utilization mode with either the remote controller 40 or the communication terminal 50. The execution timing of the ON operation may be any timing of water flow in the water supply channel 10 and the hot water supply channel 11 and a timing during which water flow is stopped.

Then, when the residual hot water utilization mode is turned on, the determination result of STEP 11 becomes positive. At this time, the control device 30 sets the remaining hot water utilization mode to the ON state (valid state) in STEP 12, and starts counting the number of times of hot water supply, which is the number of times of supply of hot water for hot water supply to any of the hot water supply target units 20.

Here, in the present embodiment, after the determination result of STEP1 becomes affirmative (after determining that there is water flow), until the determination result of STEP6 becomes affirmative (water flow has stopped). The number of times of hot water supply is counted by regarding the passage of water through the water supply channel 10 and the hot water supply channel 11 as one hot water supply. That is, each time the determination result of STEP 6 becomes affirmative, the number of times of hot water supply is counted so as to increase the number of times of hot water supply by one.

Therefore, for example, as shown in the timing chart of FIG. 4A, when the residual hot water utilization mode is turned on at the timing (time t2) of the water flow of the water supply channel 10 and the hot water supply channel 11, when the water flow is stopped ( At time t3), the number of hot water supplies is counted as the first time. Further, for example, as shown in the timing chart of FIG. 4B, when the residual hot water utilization mode is turned on at the timing (time t7) when the water flow of the water supply passage 10 and the hot water supply passage 11 is stopped, the water supply passage is then passed. After the water is started (after time t8), when the water flow is stopped (time t9), the number of times of hot water supply is counted as the first time.

Next, in STEP 13, the control device 30 determines whether or not the number of times of hot water supply has reached the predetermined number of times N1. In this case, the predetermined number of times N1 can be set to a desired value within a predetermined range by the user performing a predetermined operation of the remote controller 40 or the communication terminal 50 in advance. In the present embodiment, the fact that the determination result of STEP 13 becomes positive corresponds to the predetermined cancellation condition in the present invention.

When the determination result of STEP 13 is negative (when the number of times of hot water supply <N1), the control device 30 further performs the OFF operation (remaining) of the remaining hot water utilization mode by any remote controller 40 or the communication terminal 50 in STEP 14. It is determined whether or not the operation of turning off the hot water use mode) has been performed.

If the determination result of STEP 14 is negative (when the residual hot water utilization mode is not turned off), the control device 30 repeats the process from STEP 13.

Then, when the determination result of STEP 13 becomes affirmative (when the number of times of hot water supply ≥ N1), the control device 30 then sets the save mode of the remote controller 40 to the ON state (valid state) in STEP 15. (The display of the display unit 41 of the remote controller 40 is switched from the normal mode to the save mode), and each remote controller control unit 43 is instructed to do so.

At this time, the remote control unit 43 of the remote controller 40 executes the display control of the display unit 41 on the remote controller 40 in the save mode. As a result, when the water flow of the water supply passage 10 and the hot water supply passage 11 is stopped, the set value of the target hot water supply temperature is not displayed on the display unit 41 of each remote controller 40.

Following the process of STEP 15, the control device 30 switches the residual hot water utilization mode to the OFF state in STEP 16, and resets the count value of the number of times of hot water supply to zero. After that, the control device 30 restarts the process from STEP 11. Further, the control device 30 also processes the STEP 16 even when the determination result of the STEP 14 becomes affirmative before the determination result of the STEP 13 becomes affirmative (when the operation of turning off the residual hot water utilization mode is performed). Is executed, and further, the processing from STEP 11 is restarted.

By the above processing, when the user turns on the residual hot water utilization mode with the remote controller 40 or the communication terminal 50 in order to use up the hot water remaining in the hot water supply passage 11, the residual hot water utilization mode is set as the operation mode of the heat source machine 2. It turns on. Then, in the ON state of this residual hot water utilization mode, the heating device 12 does not operate (combustion operation of the burner 13 is not performed) even if water is passed through the water supply passage 10 and the hot water supply passage 11, so that the user can use the heat source. The hot water remaining in the hot water supply passage 11 can be effectively used without operating the heating device 12 while keeping the machine 2 in the ON state.

After that, even if the user leaves the mode for using the remaining hot water without turning it off, the control device 30 automatically switches the mode for using the remaining hot water when the count value of the number of times of hot water supply reaches N1. Return to the OFF state.

For example, when the predetermined number of times N1 is set to "1", as illustrated in FIG. 4A or FIG. 4B, after the user performs the ON operation of the residual hot water utilization mode, the OFF operation of the residual hot water utilization mode is not performed. In both cases, when the first hot water supply (water flow) is completed (time t3 in FIG. 4A, time t9 in FIG. 4B), the remaining hot water use mode automatically switches from the ON state to the OFF state. Therefore, after that, when water flow through the water supply channel 10 and the hot water supply channel 11 is started (time t4 in FIG. 4A, time t10 in FIG. 4B), the heating device 12 is activated to heat the hot water supply water. As a result, the hot water supply target portion 20 is supplied with hot water supply water heated to a temperature that matches or substantially matches the target hot water supply temperature by the heating device 12.

In this way, after the user uses the remaining hot water in the hot water supply passage 11, the remaining hot water utilization mode can be automatically returned to the OFF state without performing the OFF operation of the residual hot water utilization mode. Therefore, when the user restarts the water flow of the water supply passage 10 and the hot water supply passage 11 in order to execute the hot water supply heating operation of the heat source machine 2, the residual hot water utilization mode remains ON. By extension, it is possible to prevent the unheated hot water supply water from being supplied to the hot water supply target portion 20. Therefore, the convenience of the hot water supply device 1 can be enhanced.

If the determination result of STEP 13 becomes affirmative, there is a high possibility that the execution of the hot water supply heating operation of the heat source machine 2 by passing water through the water supply channel 10 and the hot water supply channel 11 is not required for a while thereafter. Therefore, in the present embodiment, the save mode of the remote controller 40 is turned on by the process of STEP15. As a result, the save mode of the remote controller 40 can be automatically turned on at an appropriate timing.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. Since this embodiment differs from the first embodiment only in a part of the control processing, the same matters as those in the first embodiment will not be described.

In the present embodiment, the control device 30 executes the setting of ON / OFF of the residual hot water utilization mode as shown in the flowchart of FIG. Specifically, in STEP 21, the control device 30 sequentially repeats the process of determining whether or not the residual hot water utilization mode has been turned on, as in STEP 11, until the determination result becomes affirmative.

Then, when the determination result of STEP 21 becomes affirmative (when the residual hot water utilization mode is turned ON), the control device 30 sets the residual hot water utilization mode to the ON state (valid state) in STEP 22 and sets the residual hot water utilization mode to the ON state (valid state). Starts counting the elapsed time since the usage mode is turned on.

Next, in STEP 23, the control device 30 determines whether or not the elapsed time has reached the predetermined time t1. In this case, the predetermined time t1 can be set to a desired time within a predetermined range by the user performing a predetermined operation of the remote controller 40 or the communication terminal 50 in advance. In the present embodiment, the fact that the determination result of STEP 23 becomes positive corresponds to the predetermined cancellation condition in the present invention.

If the determination result of STEP 23 is negative (when the elapsed time <t1), the control device device 30 further performs the OFF operation of the residual hot water utilization mode with any remote controller 40 or the communication terminal 50 in STEP 24. Determine if it was done.

If the determination result of STEP 24 is negative (when the residual hot water utilization mode is not turned off), the control device 30 repeats the process from STEP 23.

Then, when the determination result of STEP 23 becomes affirmative (when the elapsed time ≥ t1), the control device 30 then sets the save mode of the remote controller 50 to the ON state (valid state) in STEP 25. Instruct each remote controller control unit 43 to do so. As a result, when the water flow of the water supply passage 10 and the hot water supply passage 11 is stopped, the set value of the target hot water supply temperature is not displayed on the display unit 41 of each remote controller 40.

Following the process of STEP 25, the control device 30 switches the residual hot water utilization mode to the OFF state in STEP 26, and resets the timed value of the elapsed time to zero. After that, the control device 30 restarts the process from STEP 21. Further, the control device 30 also processes the STEP 26 even when the determination result of the STEP 24 becomes affirmative before the determination result of the STEP 23 becomes affirmative (when the residual hot water utilization mode is turned off). Is executed, and further, the processing from STEP 21 is restarted. The present embodiment is the same as the first embodiment except for the matters described above.

By the above processing, the user turns on the remaining hot water utilization mode as in the first embodiment, so that the heat source machine 2 is kept in the ON state and the hot water is supplied without operating the heating device 12. The hot water remaining on the road 11 can be effectively used.

After that, even if the user leaves the remaining hot water use mode ON without performing the OFF operation, the control device 30 automatically performs when the elapsed time in the ON state of the residual hot water use mode reaches a predetermined time t1. The remaining hot water use mode is returned to the OFF state.

For example, as illustrated in FIG. 6, when the elapsed time reaches a predetermined time t1 (time t15) even if the user has turned on the remaining hot water use mode and then turned off the remaining hot water use mode, the remaining hot water remains. The hot water use mode automatically switches from the ON state to the OFF state.

Therefore, after that, when water flow through the water supply channel 10 and the hot water supply channel 11 is started (time t16 in FIG. 6), the heating device 12 is activated to heat the hot water supply water. As a result, the hot water supply target portion 20 is supplied with hot water supply water heated to a temperature that matches or substantially matches the target hot water supply temperature by the heating device 12.

In addition, the graph of the first stage (top stage) of FIG. 6, the graph of the second stage, and the graph of the third stage are the change patterns of the presence or absence of water flow in the water supply channel 10 and the hot water supply channel 11, respectively. The ON / OFF change pattern of the residual hot water utilization mode and the change pattern of the presence / absence of operation of the heating device 12 are illustrated. Further, FIG. 6 illustrates a case where the residual hot water utilization mode is turned on while the water supply channel 10 and the hot water supply channel 11 are flowing, but the residual hot water utilization mode is turned on while the water flow is stopped. Even when the above is performed, when the elapsed time reaches t1 for a predetermined time, the residual hot water utilization mode is automatically switched from the ON state to the OFF state in the same manner as described above.

As described above, also in the present embodiment, after the user uses the remaining hot water in the hot water supply passage 11, the remaining hot water utilization mode can be automatically returned to the OFF state without performing the OFF operation of the residual hot water utilization mode. .. Therefore, as in the first embodiment, when the user restarts the water flow of the water supply passage 10 and the hot water supply passage 11 in order to execute the hot water supply heating operation of the heat source machine 2, the residual hot water utilization mode is turned on. It is possible to prevent the water from being left unheated, and thus to prevent the unheated hot water supply water from being supplied to the hot water supply target portion 20. Therefore, the convenience of the hot water supply device 1 can be enhanced.

Further, in the present embodiment, after the residual hot water utilization mode is turned on, the residual hot water utilization mode is automatically set when a predetermined time t1 elapses regardless of whether or not water is flowing through the water supply channel 10 and the hot water supply channel 11. Returns to the OFF state. Therefore, for example, when the water flow stop state is maintained due to the user canceling or forgetting to use the remaining hot water after the remaining hot water use mode is turned on while the water flow is stopped. However, when the predetermined time t1 elapses, the residual hot water utilization mode can be automatically returned to the OFF state. This also enhances the convenience of the hot water supply device 1.

Further, when the determination result of STEP 23 becomes affirmative, the save mode of the remote controller 40 is turned on by the process of STEP 25, so that the save mode of the remote controller 40 is set to an appropriate timing as in the first embodiment. Can be turned on automatically with.

In the present embodiment, when the elapsed time reaches t1 during the passage of water through the water supply passage 10 and the hot water supply passage 11 in the ON state of the residual hot water utilization mode, the residual hot water utilization mode is turned OFF, so that heating is performed. The operation of the device 12 starts. However, for example, when the elapsed time reaches t1 during the passage of water through the water supply passage 10 and the hot water supply passage 11 in the ON state of the residual hot water utilization mode, the residual hot water utilization mode is performed until the water passage is stopped. May be maintained in the ON state. That is, in STEP23, it is determined whether or not both the condition that the elapsed time ≥ t1 and the condition that the water flow through the water supply channel 10 and the hot water supply channel 11 is stopped are satisfied, and the determination result becomes affirmative. In that case, the processes of STEP 25 and 26 may be executed.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. 7 and 8. Since this embodiment differs from the first embodiment only in a part of the control processing, the same matters as those in the first embodiment will not be described.

In the present embodiment, the control device 30 executes the setting of ON / OFF of the residual hot water utilization mode as shown in the flowchart of FIG. Specifically, in STEP 31, the control device 30 sequentially repeats the process of determining whether or not the residual hot water utilization mode has been turned on, as in STEP 11, until the determination result becomes affirmative.

Then, when the determination result of STEP 31 becomes affirmative (when the residual hot water utilization mode is turned ON), the control device 30 sets the residual hot water utilization mode to the ON state (valid state) in STEP 32 and the residual hot water utilization mode. After the usage mode is turned on, the integration of the water flow rates of the water supply passage 10 and the hot water supply passage 11 (integration of the supply amount of hot water supply to the hot water supply target unit 20) is started. In this case, the product of the water flow rate detection value (detected value in a predetermined sampling cycle) by the flow rate sensor 23 and the sampling cycle, that is, the supply of hot water for hot water supply to the hot water supply target unit 20 within the time of the sampling cycle. By accumulating the amounts, the integrated value of the water flow rate (the integrated value of the supply amount of hot water for hot water supply to the hot water supply target unit 20) is calculated.

Next, in STEP 33, the integrated value of the water flow rate of the control device 30 reaches a predetermined value Iw1, and the water flow of the water supply channel 10 and the hot water supply channel 11 (supply of hot water supply water of the hot water supply target unit 20) is stopped. Judge whether the condition of being present is satisfied. In this case, the predetermined value Iw1 can be set to a desired value within a predetermined range by the user performing a predetermined operation of the remote controller 40 or the communication terminal 50 in advance.

Alternatively, the amount of hot water supplied by the hot water supply channel 11 (specifically, the amount of hot water supplied by the hot water supply channel 11 from the heat source machine 2 to any of the hot water supply target portions 20 or each hot water supply from the heat source machine 2). The average value of the amount of hot water for hot water supply held by the hot water supply passage 11 up to the target unit 20) is estimated at the time of installation of the hot water supply device 1, and the estimated value of the amount of water (volume) is set as a predetermined value Iw1. You may. In the present embodiment, the fact that the determination result of STEP 33 becomes positive corresponds to the predetermined cancellation condition in the present invention.

If the determination result of STEP 33 is negative (in the case where the integrated value of the water flow rate <Iw1 or the water flow of the water supply channel 10 and the hot water supply channel 11), the control device 30 further increases the STEP 34. In, it is determined whether or not the remaining hot water utilization mode is turned off by any of the remote controllers 40 or the communication terminal 50.

If the determination result of STEP 34 is negative (when the residual hot water utilization mode is not turned off), the control device 30 repeats the process from STEP 33.

Then, when the determination result of STEP 33 becomes affirmative (when the integrated value of the water flow rate ≥ Iw1 and the water flow in the water supply channel 10 and the hot water supply channel 11 is stopped), the control device 30 Next, in STEP 35, commands each remote controller control unit 43 to set the save mode of the remote controller 50 to the ON state (valid state). As a result, when the water flow of the water supply passage 10 and the hot water supply passage 11 is stopped, the set value of the target hot water supply temperature is not displayed on the display unit 41 of each remote controller 40.

Following the process of STEP 35, the control device 30 switches the residual hot water utilization mode to the OFF state in STEP 36, and resets the integrated value of the water flow rate to zero. After that, the control device 30 resumes the processing from STEP 31. Further, the control device 30 also processes the STEP 36 even when the determination result of the STEP 34 becomes affirmative before the determination result of the STEP 33 becomes affirmative (when the operation of turning off the residual hot water utilization mode is performed). Is executed, and further, the processing from STEP 31 is restarted. The present embodiment is the same as the first embodiment except for the matters described above.

By the above processing, the user turns on the remaining hot water utilization mode as in the first embodiment, so that the heat source machine 2 is kept in the ON state and the hot water is supplied without operating the heating device 12. The hot water remaining on the road 11 can be effectively used.

After that, even if the user leaves the remaining hot water utilization mode without turning it off, the integrated value of the water flow rate in the ON state of the residual hot water utilization mode reaches the predetermined value Iw1 and the water supply channel. When the water flow through the hot water supply passage 11 and the hot water supply passage 11 is stopped, the control device 30 automatically returns the residual hot water utilization mode to the OFF state.

For example, as illustrated in FIG. 8, the integrated value of the water flow rate reaches the predetermined value Iw1 (time t25) even if the user does not turn off the remaining hot water use mode after turning on the remaining hot water use mode. ) Further, when the water flow through the water supply channel 10 and the hot water supply channel 11 is stopped (time t26), the residual hot water utilization mode is automatically switched from the ON state to the OFF state.

Therefore, after that, when water flow through the water supply channel 10 and the hot water supply channel 11 is started (time t27 in FIG. 8), the heating device 12 is activated to heat the hot water supply water. As a result, the hot water supply target portion 20 is supplied with hot water supply water heated to a temperature that matches or substantially matches the target hot water supply temperature by the heating device 12.

In addition, the graph of the first stage (top stage) of FIG. 8, the graph of the second stage is the graph of the third stage, and the graph of the fourth stage is the passage of the water supply channel 10 and the hot water supply channel 11, respectively. The change pattern of the presence / absence of water, the change pattern of the integrated value of the flow rate of water flow, the change pattern of ON / OFF of the residual hot water utilization mode, and the change pattern of the presence / absence of operation of the heating device 12 are illustrated. Further, FIG. 8 illustrates a case where the residual hot water utilization mode is turned on while the water supply channel 10 and the hot water supply channel 11 are flowing, but the residual hot water utilization mode is turned on while the water flow is stopped. After that, when the integrated value of the water flow rate reaches the predetermined value Iw1 and the water flow in the water supply channel 10 and the hot water supply channel 11 is stopped, the residual hot water utilization mode is automatically set as described above. It switches from the ON state to the OFF state.

As described above, also in the present embodiment, after the user uses the remaining hot water in the hot water supply passage 11, the remaining hot water utilization mode can be automatically returned to the OFF state without performing the OFF operation of the residual hot water utilization mode. .. Therefore, as in the first embodiment, when the user restarts the water flow of the water supply passage 10 and the hot water supply passage 11 in order to execute the hot water supply heating operation of the heat source machine 2, the residual hot water utilization mode is turned on. It is possible to prevent the water from being left unheated, and thus to prevent the unheated hot water supply water from being supplied to the hot water supply target portion 20. Therefore, the convenience of the hot water supply device 1 can be enhanced.

Further, when the determination result of STEP 33 becomes affirmative, the save mode of the remote controller 40 is turned on by the process of STEP 35, so that the save mode of the remote controller 40 is set to an appropriate timing as in the first embodiment. Can be turned on automatically with.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, only a part of the ON / OFF setting processing of the residual hot water utilization mode is different from the first embodiment, the second embodiment, or the third embodiment. The same matters as those of the first embodiment, the second embodiment, and the third embodiment will be omitted.

In the present embodiment, the control device 30 executes the setting of ON / OFF of the residual hot water utilization mode as shown in the flowchart of FIG. Specifically, in STEP 41, the control device 30 sequentially repeats the process of determining whether or not the residual hot water utilization mode has been turned on, as in STEP 11, until the determination result becomes affirmative.

Then, when the determination result of STEP 41 becomes affirmative (when the ON operation of the residual hot water utilization mode is performed), the control device 30 sends the residual hot water (remaining hot water) heated by the heating device 12 to the hot water supply passage 11 in STEP 42. Judgment processing for estimating whether or not (hot water for hot water supply) having a relatively small temperature difference from the target hot water supply temperature remains is executed. In this STEP 42, for example, whether or not the control device 30 is executing the hot water supply heating operation of the heat source machine 2, or whether or not the elapsed time after the execution of the hot water supply and heating operation is stopped is not more than a predetermined time, or The temperature detection value by the hot water supply temperature detected by the temperature sensor 25 and the temperature detection value by the temperature sensor provided so as to detect the temperature of the hot water supply water in the hot water supply passage 11 in or near the hot water supply target portion 20 are equal to or higher than the predetermined temperature. It is estimated whether or not the remaining hot water remains in the hot water supply channel 11 depending on whether or not the hot water supply channel 11 is left.

Then, when the determination result of STEP 42 is affirmative (when it is estimated that residual hot water remains in the hot water supply passage 11), the control device 30 turns on the residual hot water utilization mode in STEP 12 or STEP 22 or STEP 32. Put it in a state. Further, when the determination result of STEP 42 is negative (when it is estimated that there is no residual hot water remaining in the hot water supply passage 11), the control device 30 does not turn on the residual hot water utilization mode, and STEP 41 Repeat the process from. In this case, the remote controller 40 or the communication terminal 50 may be used to notify that there is no remaining hot water.

The present embodiment is the same as any of the first to third embodiments except for the matters described above. According to this embodiment, it is presumed that no residual hot water remains in the hot water supply passage 11 even if the user executes the ON operation of the residual hot water utilization mode (in other words, the hot water supply in the hot water supply passage 11). In the situation where it is estimated that the irrigation water is already cold), the residual hot water utilization mode is not set to the ON state. Therefore, when water is flowing through the water supply passage 10 and the hot water supply passage 11 after the residual hot water utilization mode is turned on, the hot water supply heating operation of the heat source machine 2 is immediately started, and the heated hot water supply target portion 20 is supplied. can do.

In each of the above-described embodiments, the heating device 12 of the heat source machine 2 is a combustion type heating device, but the heating device of the heat source machine is an electric heating device (a heating device that converts electric energy into heat energy). ) May be.

Further, in each of the above-described embodiments, when the determination result of STEP 13 or 23 or 33 becomes affirmative, the save mode of the remote controller 30 is automatically turned on, but such a process (STEP 15, The processing of 25 and 35) may be omitted.

Further, in the first to third embodiments, the ON / OFF setting of the residual hot water utilization mode is performed by each separate process, but the residual hot water utilization mode is turned ON by a process in which each process is combined. You may set / OFF. For example, when the determination result of any one of STEP 13 or 23 or 33 becomes affirmative, the residual hot water utilization mode may be switched from the ON state to the OFF state. This also applies to the fourth embodiment.

Further, in each of the above-described embodiments, the processing shown in the flowchart of FIG. 2 and the processing shown in the flowchart of FIG. 3 or FIG. 5 or FIG. 7 or FIG. 9 are executed by the control device 30. It is also possible to execute a part by, for example, the remote control unit 43 of any remote control 40. For example, the process shown in the flowchart of FIG. 3 or FIG. 5 or FIG. 7 or FIG. 9 may be executed by the remote control unit 43 of any remote controller 40.

Further, the operation terminal in the present invention is not limited to the remote controller 40 or the communication terminal 50, and includes some operation switches of the operation unit 42 of the remote controller 40, such as an operation switch for setting ON / OFF of the residual hot water utilization mode. It may be a portable remote controller or the like provided with an operation switch having the same function.

1 ... hot water supply device, 2 ... heat source machine, 11 ... hot water supply path, 20 ... hot water supply target unit, 30 ... control device, 40 ... remote control (operation terminal), 50 ... communication terminal (operation terminal).

Claims (6)

A heat source machine that heats the supplied hot water supply water to discharge hot water, a hot water supply path that supplies hot water supply water discharged from the heat source machine to the hot water supply target portion, and an operation configured to be able to perform operations related to the operation of the heat source machine. A hot water supply device including a terminal and a control device having a function of controlling the operation of the heat source machine.
The control device prohibits the heat source machine from heating the hot water supply water supplied to the hot water supply target portion when a predetermined operation is executed by the operation terminal, and thereafter, the control device does not depend on the operation of the operation terminal. The hot water supply device is configured to release the prohibition of heating of the hot water supply water by the heat source machine when the release condition of the above is satisfied. In the hot water supply device according to claim 1,
The control device determines whether or not residual hot water warmed by heating by the heat source machine remains in the hot water supply path when the predetermined operation is executed by the operation terminal, and the result of the determination. A hot water supply device, characterized in that it is prohibited from heating the hot water supply water supplied to the hot water supply target portion by the heat source machine, provided that is affirmative. In the hot water supply device according to claim 1 or 2.
The control device has a function of counting the number of times the hot water supply water is supplied to the hot water supply target portion after prohibiting the heating of the hot water supply water by the heat source machine, and the predetermined release condition is the supply number of times. A hot water supply device comprising the condition that the number of times reaches a predetermined number of times. In the hot water supply device according to claim 1 or 2.
The control device has a function of measuring the elapsed time after prohibiting the heating of the hot water supply water by the heat source machine, and the predetermined release condition includes a condition that the elapsed time reaches a predetermined time. A hot water supply device characterized by this. In the hot water supply device according to claim 1 or 2.
The control device has a function of accumulating the supply amount of the hot water supply water to the hot water supply target portion after prohibiting the heating of the hot water supply water by the heat source machine, and the predetermined release condition is the supply amount. A hot water supply device comprising a condition that the supply of hot water for hot water supply to the hot water supply target portion is stopped when the integrated value of the above reaches a predetermined value. In the hot water supply device according to any one of claims 1 to 5.
The operation terminal is a remote controller, has a display unit capable of displaying a set value of a target temperature of hot water supplied from the heat source machine to the hot water supply target unit, and displays the set value of the target temperature on the display unit. It has a normal mode and a save mode in which the set value of the target temperature is not displayed on the display unit, and is configured to shift from the normal mode to the save mode when the predetermined release condition is satisfied. A hot water supply device characterized by this.