JP6684580B2 - Hot water supply system - Google Patents

Description

  The present invention relates to a hot water supply system.

  2. Description of the Related Art As a hot water supply device provided conventionally, there is a device that notifies a user when an abnormality occurs. For example, in the hot water supply system disclosed in Patent Document 1, when an abnormality occurs in the hot water supply device, an error code is displayed on the display unit of the remote controller, and a voice notification unit of the remote controller notifies by voice. ing.

JP-A-2000-283555

  The above-mentioned conventional technique is a technique for performing a highly urgent voice notification when the user should take immediate action, such as when the gas solenoid valve or sensors are out of order. Although such a voice notification is effective when the user is required to take a compulsory response such as an immediate discontinuation of use, when the user does not need to take an immediate response or the user should make a decision. If the same notification is applied even in some cases, there is a problem that the user's annoyance increases.

  The present invention has been made to solve the above-mentioned problems, and it is possible for a user to be aware of the state of the system at a predetermined time while suppressing the annoyance caused by the increase in the number of voice notifications. It is an object of the present invention to provide a hot water supply system that can improve the water supply.

The hot water supply system of the present invention is
A water heater with a gas burner,
A remote controller having at least a display notifying unit for notifying by displaying error information and a voice notifying unit for notifying by voice,
A control unit that controls the display notification unit and the voice notification unit;
Equipped with
The control unit executes a preliminary notification control of performing only a notification by the display notification unit among the notification by the display notification unit and the notification by the voice notification unit when a predetermined preliminary notification condition is satisfied, and the preliminary notification control After execution of the above, after a lapse of time until a predetermined main notification condition is satisfied, main notification control for performing both the notification by the display notification unit and the notification by the voice notification unit is executed.

  In the present invention, when the predetermined preliminary notification condition is satisfied, the control unit executes the preliminary notification control in which the display notification unit notifies. In this way, if the preliminary notification control is performed before the main notification control, it is easier to give the user a chance to be aware of the system state at a time when it is more desirable to be aware of the state of the hot water supply system. Become. Moreover, since the preliminary notification control is a control for performing only the display notification among the display notification and the sound notification, the user can control the system while suppressing the annoyance caused by the increase in the number of sound notifications. The possibility of being aware of the state can be increased.

  In the present invention, the hot water supply device recovers sensible heat and latent heat from the combustion exhaust gas generated by the combustion in the gas burner, and neutralizes the drain generated with the recovery of the latent heat by the neutralizer containing the neutralizing agent. It may be a water heater of the type. The control unit executes the preliminary notification control when the neutralizer is in the first remaining amount reduced state, and is in a state where the remaining amount of the neutralizing agent is lower than in the first remaining amount reduced state. The present notification control may be executed when the remaining amount is reduced.

  According to this configuration, the notification (preliminary notification control) by the display can be performed in a state where the residual amount of the neutralizing agent has decreased to some extent (first residual amount lowering state), and the user can be promptly responded. . This makes it easier for the user to know that the time to deal with the neutralizing agent (for example, the time to replenish or replace) is near, and at the same time, the annoyance due to the voice notification being forced is annoying. Can be prevented. On the other hand, in the second state of low remaining amount, which has become more urgent, in addition to notification by display, notification by voice is also used, so that the user can be more strongly aware of the state of low remaining amount and prompt action is taken. Can be encouraged.

  In the present invention, the control unit determines, based on the amount of gas supplied to the gas burner and the combustion time in the gas burner, whether the neutralizer is in the first remaining amount reduction state and the second remaining amount reduction. The configuration may be such that it is determined whether or not it is in a state.

  Since the amount of gas supplied to the gas burner and the combustion time in the gas burner have a high correlation with the amount of drain generated by the operation of the hot water supply system, based on these, the first remaining amount reduction state and the By determining the second remaining amount lowering state, it is possible to notify each at a more appropriate time.

FIG. 1 is a schematic circuit diagram illustrating a hot water supply system according to the first embodiment. FIG. 2 is a block diagram schematically illustrating the controller and the remote controller included in the hot water supply system according to the first embodiment. FIG. 3 is a flowchart illustrating the notification control executed in the 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)
The 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 the bathtub 60 and a function of heating water in the bathtub 60, and is mainly configured by a hot water supply device 1A and a remote controller 80, The hot water supply device 1A 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 is a part that burns combustion gas to generate combustion exhaust gas. The heat exchanger 6 transfers the heat generated in the gas burner 4 to the water passing 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). It is a part for boiling the hot water, is provided in the middle of the hot water supply side water passage, and functions to transfer the heat generated by the combustion in the gas burner 4 to the water passing through the hot water supply side water passage. 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.

  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.

  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 is configured as a path in which one end side and the other end side communicate with the inside of the bathtub 60 and the water discharged from the bathtub 60 passes through and returns 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 includes a bath primary heat exchanger 57 and a bath secondary heat exchanger 58, and transfers heat generated in the gas burner 54 (bath side burner) to water passing through the pipe 66 (circulation path). Function.

  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 functions to detect the water temperature of the water discharged from the bathtub 60 (that is, the water temperature in the bathtub 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 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.

  In the secondary heat exchangers 8 and 58, heat is taken from the exhaust gas having a correspondingly high relative humidity, so that the water vapor in the exhaust gas is condensed to generate drain (condensed water). Therefore, a drain drain pipe 76 is provided to discharge this drain, and a neutralizer 78 is provided at the downstream end of the drain drain pipe 76. The neutralizer 78 is provided to neutralize an acidic drain containing nitrogen oxides and sulfur oxides. The neutralizer 78 has a neutralizing agent (for example, a neutralizing agent) for neutralizing the drain inside the neutralizer 78. , Calcium carbonate). As described above, the hot water supply device 1A recovers the sensible heat and the latent heat from the combustion exhaust gas generated by the combustion in the gas burners 4 and 54, and the drain generated by the recovery of the latent heat is neutralized by the neutralizer 78 containing the neutralizer. It is a latent heat recovery type water heater that neutralizes.

  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 circuit 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 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, and can control various actuators provided in the hot water supply side circuit 2 and the bath side circuit 3. . For example, the controller 22 has a function of controlling the water flow rate control valve 33, the hot water supply gas proportional control valve 44, the hot water supply switching solenoid valve 46, the switching solenoid valve 53, and the like.

  As shown in FIG. 2, the plurality of remote controllers 80 are arranged in a configuration capable of communicating with the controller 22. 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 circuit 81A configured as a known microcomputer or the like, a display section 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 provided with a plurality of operation units used for, for example, an input operation for instructing a set temperature (hot water supply temperature), an input operation for instructing a predetermined energy saving mode, an input operation for instructing automatic filling of the bathtub 60, and the like. It is configured.

  The same applies to the second remote controller 82, which includes a control circuit 82A configured as a known microcomputer or the like, a display unit 82B configured as a liquid crystal display device, etc., 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. 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. Information set by both remote controllers 80 (set temperature, bath temperature, bath water amount, etc.) is stored in the memory 22B of the controller 22.

  In this configuration, the display units 81B and 82B correspond to an example of a display notification unit that performs notification by displaying at least error information. Then, the voice output units 81E and 82E correspond to an example of a voice notification unit that performs notification by voice.

(Notification control)
Next, the notification control will be described with reference to FIG.
The notification control of FIG. 3 is, for example, control executed by the control circuit 22A when a predetermined start condition is satisfied (for example, when the controller 22 is powered on), and when the notification control is started, First, it is determined whether or not the preliminary notification condition is satisfied (S1).

  In this configuration, the time when the neutralizer 78 is in the first remaining amount reduction state is defined as "when the preliminary notification condition is satisfied". Specifically, the integrated value (cumulative value) of the amount of gas sent to the gas burners 4, 54 is calculated based on the amount of gas supplied to the gas burners 4, 54 and the combustion time in the gas burners 4, 54. When the gas source solenoid valve 42 is opened, the gas flow rate per unit time is determined by the opening degree of the hot water supply gas proportional control valve 44 and the total opening area of the hot water supply switching solenoid valve 46 and the switching solenoid valve 53. For example, when the combination of the opening degree of the hot water supply gas proportional control valve 44 and the total opening area of the hot water supply switching solenoid valve 46 and the switching solenoid valve 53 is kept in a state, the combination determines the gas flow rate per unit time. . Then, when a certain period of time has passed with the combination, the gas consumption amount is determined by multiplying the gas flow rate per unit time of the combination by the elapsed time (elapsed time). Such calculation is performed each time the gas flow rate per unit time is changed, and the cumulative gas consumption amount in the hot water supply system 1 is obtained by accumulating the gas consumption amount (integrated value) obtained by each calculation. You can

  As described above, in the hot water supply system 1, the controller 22 continuously calculates the cumulative gas consumption amount in the hot water supply system 1, and the calculation result of the cumulative gas consumption amount is stored in the nonvolatile memory configuring the memory 22B. And is updated according to gas consumption. The cumulative gas consumption and the amount of drain generated have a high positive correlation, and the cumulative gas consumption and the residual amount of the neutralizing agent have a high negative correlation. That is, as the cumulative gas consumption increases, the remaining amount of the neutralizing agent decreases. Utilizing such a relationship, in S1 of FIG. 3, as the determination of "whether or not the preliminary notification condition is satisfied", specifically, "the cumulative gas consumption amount stored in the memory 22B is the first value" is determined. Has been reached? " The first value is a cumulative gas consumption amount in which it is assumed that the neutralizer contained in the neutralizer 78 has a predetermined residual amount larger than 0. As described above, the control circuit 22A determines in S1 whether the neutralizer 78 is in the first remaining amount reduced state (the remaining amount reduced state corresponding to the cumulative gas consumption amount of the first value). To do.

  If the cumulative gas consumption amount stored in the memory 22B has not reached the first value, the process proceeds to No in S1 and the determination in S1 is repeated. That is, in hot water supply system 1, the determination process of S1 is periodically repeated until the cumulative gas consumption amount stored in memory 22B reaches the first value.

  When the cumulative gas consumption amount stored in the memory 22B reaches the first value, the process proceeds to Yes in S1 and preliminary notification is performed in S2. The process of S2 is a process of performing only the notification by the display notification unit out of the notification by the display notification unit and the notification by the voice notification unit. Specifically, the control circuit 22A of the controller 22 transmits a preliminary notification command to the first remote controller 81 and the second remote controller 82. When the first remote controller 81 and the second remote controller 82 receive the preliminary notification command transmitted from the control circuit 22A, the control circuit 81A causes the display unit 81B to display predetermined preliminary notification information, and the control circuit 82A , The predetermined preliminary notification information is displayed on the display section 82B. This preliminary notification information may be, for example, an error code (such as an error code indicating that the amount of the neutralizing agent has run low). It may be a message display indicating that the remaining amount is decreasing, or that the time to replace or replenish the neutralizing agent is approaching.

  After performing the preliminary notification in S2, it is determined whether or not the main notification condition is satisfied (S3). Specifically, "whether or not the cumulative gas consumption amount stored in the memory 22B has reached the second value" is determined. The second value is a cumulative gas consumption amount in which the neutralizer contained in the neutralizer 78 is assumed to be 0 or the remaining amount close to 0, and is a value larger than the first value. In this way, the control circuit 22A determines in S3 whether the neutralizer 78 is in the second remaining amount reduced state (remaining amount reduced state corresponding to the accumulated gas consumption amount of the second value). To do.

  If the cumulative gas consumption amount stored in the memory 22B has not reached the second value, the process proceeds to No in S3 and the determination in S3 is repeated. That is, in hot water supply system 1, after performing the preliminary notification in S2, the determination process of S3 is periodically repeated until the cumulative gas consumption amount stored in memory 22B reaches the second value.

  When the cumulative gas consumption amount stored in the memory 22B reaches the second value, the process proceeds to Yes in S3 and the main notification is given in S4. The process of S4 is a process of performing both the notification by the display notification unit and the notification by the voice notification unit. Specifically, the control circuit 22A of the controller 22 instructs the first remote controller 81 and the second remote controller 82. And sends a command for this notification. When the first remote controller 81 and the second remote controller 82 receive the main notification command transmitted from the control circuit 22A, the control circuit 81A causes the display unit 81B to display the predetermined main notification information, and the audio output unit. A predetermined main notification voice is generated at 81E. Similarly, the control circuit 82A causes the display unit 82B to display predetermined main notification information, and causes the audio output unit 82E to generate a predetermined main notification voice.

  The main notification information displayed in S4 may be the same information as the preliminary notification information or may be different. For example, this notification information may be an error code different from the preliminary notification information (such as an error code indicating that the neutralizing agent has been exhausted), and the neutralizing agent has been exhausted such as "neutralizing agent has been exhausted". Alternatively, a message indicating that it is time to replace or replenish the neutralizing agent may be displayed. In addition, the notification voice issued in S4 is a message voice such as "the neutralizer has run out" indicating that the neutralizer has run out, or that it is time to replace or replenish the neutralizer. Alternatively, a predetermined buzzer sound, an alarm sound or the like indicating that the neutralizer has run out may be used. Such a main notification sound may be continuously emitted for a certain period of time after the execution of S4, and may be performed periodically or when a predetermined condition is satisfied (for example, hot water supply operation) until a predetermined cancellation condition is satisfied. May be issued at the beginning of). The predetermined start condition may be, for example, a predetermined reset operation on the operation unit of the controller 80, a predetermined operation on the controller 22, or the like.

  As described above, in this configuration, the control circuits 22A, 81A, and 82A correspond to an example of the control unit, and function to control the display notification unit and the voice notification unit. Specifically, the control unit is a predetermined unit. When the preliminary notification condition of is satisfied, the preliminary notification control of performing only the notification by the display notification unit of the notification by the display notification unit and the notification by the voice notification unit is executed, and after the execution of the preliminary notification control, the predetermined main notification condition is It functions to execute the main notification control in which both the notification by the display notification unit and the notification by the voice notification unit are performed after a certain period of time elapses until the condition is satisfied. Specifically, these control circuits 22A, 81A, and 82A execute the preliminary notification control when the neutralizer 78 is in the first remaining amount lowering state, and are more neutralized than in the first remaining amount lowering state. The present notification control is executed when the second remaining amount lowering state, which is the state where the remaining amount of the agent is lowering, is brought about.

  As described above, in hot water supply system 1 of the present configuration, the control unit executes the preliminary notification control in which the display units 81B and 82B (display notification unit) perform the notification when a predetermined preliminary notification condition is satisfied. In this way, if the preliminary notification control is performed before the main notification control, it is easier to give the user a chance to be aware of the system state at a time when it is more desirable to be aware of the state of the hot water supply system. Become. Moreover, since the preliminary notification control is a control for performing only the display notification among the display notification and the sound notification, the user can control the system while suppressing the annoyance caused by the increase in the number of sound notifications. The possibility of being aware of the state can be increased.

  In this configuration, the hot water supply device 1A recovers sensible heat and latent heat from the combustion exhaust gas generated by the combustion in the gas burners 4 and 54, and drains generated by the recovery of the latent heat are neutralized by the neutralizer 78 containing the neutralizer. It is a latent heat recovery type water heater that neutralizes. Then, the control circuits 22A, 81A, 82A (control unit) execute the preliminary notification control when the neutralizer 78 is in the first remaining amount lowering state, and are more neutralized than in the first remaining amount lowering state. The present notification control is executed when the second remaining amount reduction state, which is the state where the remaining amount of the agent has decreased, is reached. According to this configuration, the notification (preliminary notification control) by the display can be performed in a state where the remaining amount of the neutralizing agent has decreased to some extent (first remaining amount reduced state), and the user can be prompted to take action. . This makes it easier for the user to know that the time to deal with the neutralizing agent (for example, the time to replenish or replace) is near, and at the same time, the annoyance due to the voice notification being forced is annoying. Can be prevented. On the other hand, in the second state of low remaining amount, which has become more urgent, in addition to notification by display, notification by voice is also used, so that the user can be more strongly aware of the state of low remaining amount and prompt action is taken. Can be encouraged.

  In the present configuration, the control circuits 22A, 81A, 82A (control unit) causes the neutralizer 78 to set the first residual amount based on the amount of gas supplied to the gas burners 4, 54 and the combustion time in the gas burners 4, 54. The configuration is such that it is determined whether the quantity is in a reduced state and the second remaining quantity is in a reduced state. The amount of gas supplied to the gas burners 4 and 54 and the combustion time in the gas burners 4 and 54 have a high correlation with the amount of drain that accompanies the operation of the hot water supply system 1. By determining the first remaining amount lowering state and the second remaining amount lowering state, it is possible to notify each at a more appropriate time.

<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.

  Although the hot water supply system 1 including the bath side circuit 3 is illustrated in the above-described embodiment, the hot water supply system may be applied to a hot water supply system in which the bath side circuit is not provided.

  Although the hot water supply system 1 including two remote controllers is illustrated in the above-described embodiment, the number of remote controllers may be one, or may be three or more.

  In the embodiment described above, in the hot water supply system 1 including a plurality of remote controllers, an example in which the preliminary notification control and the main notification control are performed by both remote controllers has been shown, but the preliminary notification control and the main notification are performed by any one remote controller. You may make it control. Alternatively, the preliminary notification control may be performed by only one of the remote controllers, and the main notification control may be performed by all the remote controllers.

In the above-described embodiment, the preliminary notification control and the main notification control are selectively used depending on the remaining amount of the neutralizing agent, but other examples may be used.
For example, the preliminary notification control and the main notification control may be performed according to the years of use of the hot water supply system itself. Specifically, when the first time has elapsed from the start of using the hot water supply system (when the preliminary notification condition is satisfied), the preliminary notification control is performed, and the second time which is longer than the first time ( For example, the main notification control may be performed when the useful life) has elapsed (when the main notification condition is satisfied).
Alternatively, when the first abnormal state occurs in the hot water supply system (when the preliminary notification condition is satisfied), the preliminary notification control is performed, and the first abnormal state progresses further into the second abnormal state ( The main notification control may be performed when the main notification condition is satisfied. For example, when the time from the start of the automatic filling to the completion of the automatic filling of the set temperature exceeds the first reference time, which is longer than the expected time (when the preliminary notification condition is satisfied). ), The preliminary notification control may be performed, and the main notification control may be performed when the second reference time, which is longer than the first reference time, is exceeded (when the main notification condition is satisfied). As another example, the preliminary notification control is performed when a first abnormal state occurs in which the number of errors per predetermined period (for example, per day) exceeds the first predetermined number of times (when the preliminary notification condition is satisfied), This notification is given when a second abnormal state occurs where the number of errors per predetermined period (for example, per day) exceeds a second predetermined number that is larger than the first predetermined number (when the main notification condition is met). You may make it control.

  The method of detecting the remaining amount of the neutralizing agent is not limited to the above example. For example, a sensor that detects the weight of a predetermined area where the neutralizing agent is terminated is provided in the neutralizer, and preliminary notification is given when the weight detected by this sensor falls below the first weight, and the first weight The main notification may be performed when the weight is reduced to the second weight which is smaller than the second weight.

DESCRIPTION OF SYMBOLS 1 ... Bath hot water supply system 1A ... Hot water supply device 4, 54 ... Gas burner 22A, 81A, 82A ... Control circuit (control part)
78 ... Neutralizer 80 ... Remote controller 81B, 82B ... Display unit (display notification unit)
81E, 82E ... Voice output unit (voice notification unit)

Claims (2)

A water heater with a gas burner,
A remote controller having at least a display notifying unit for notifying by displaying error information and a voice notifying unit for notifying by voice,
A control unit that controls the display notification unit and the voice notification unit;
Equipped with
The control unit executes a preliminary notification control of performing only a notification by the display notification unit among the notification by the display notification unit and the notification by the voice notification unit when a predetermined preliminary notification condition is satisfied, and the preliminary notification control After the execution of, after waiting for a predetermined main notification condition is satisfied, to execute the main notification control for both the notification by the display notification unit and the notification by the voice notification unit,
The hot water supply device is of a latent heat recovery type in which sensible heat and latent heat are recovered from combustion exhaust gas generated by combustion in the gas burner, and drain generated with recovery of the latent heat is neutralized by a neutralizer containing a neutralizing agent. Is a water heater,
The control unit executes the preliminary notification control when the neutralizer is in the first remaining amount reduced state, and the remaining amount of the neutralizing agent is lower than in the first remaining amount reduced state. In the case where the second remaining amount lowering state, which is a state, is executed, the main notification control is executed, and until the predetermined cancellation condition is satisfied, the voice notification unit issues a notification periodically or when the predetermined condition is satisfied. Hot water supply system. The controller determines, based on the amount of gas supplied to the gas burner and the combustion time in the gas burner, whether the neutralizer is in the first remaining amount lowering state and the second remaining amount. The hot water supply system according to claim 1 , wherein the hot water supply system determines whether or not the quantity is in a reduced state.

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