JP3550752B2 - Automatic bath equipment - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an automatic bath apparatus that performs a reheating operation in which bath water in a bathtub is forcibly taken out to a circulation path connected to the bathtub, heated, and then returned to the bathtub.
[0002]
Further, the present invention provides a reheating operation in which bath water in a bathtub is forcibly taken out to a circulation path connected to the bathtub, heated and then returned to the bathtub, and a hot water supply operation in which hot water is dropped into the bathtub through the circulation path. And an automatic bath apparatus for performing the same.
[0003]
[Prior art]
Generally, at the beginning of bathing in a bathtub, even if the desired hot water temperature is left as it is, the hot water temperature gradually decreases due to natural heat dissipation, and in addition, even when a person takes a bath Hot water temperature drops. Therefore, in order to always maintain a desired hot water temperature and enjoy comfortable bathing, it is necessary to reheat the hot water in the bathtub.
[0004]
For this reason, an automatic bath apparatus capable of reheating to a certain hot water temperature in response to a bather's request and an automatic reheating apparatus capable of automatically reheating near a certain hot water temperature have been considered.
[0005]
In the conventional automatic bath apparatus, when the reheating operation is instructed in order to avoid the empty heating in the bathtub, first, the circulation pump is driven to determine whether or not the bathtub water is circulating in the circulation path. When it is determined that the fuel is circulating, the reheating combustion is started, but when it is determined that the fuel is not circulating, the reheating combustion is not started. Note that a water flow switch having a movable contact that is turned on and off in accordance with the flow rate on the suction side of the circulation path is used for the above-described circulation presence / absence determination.
[0006]
After a predetermined time (for example, 30 seconds) has elapsed from the start of the reheating combustion, the process proceeds to the reheating temperature control. The reason why the combustion control is prioritized over the reheating temperature control is that the feeling of reheating can be immediately enjoyed.
[0007]
In the additional heating temperature control, the current hot water temperature in the bathtub is compared with the target temperature, but in order to accurately detect the current hot water temperature, the bath water in the bathtub is circulated and stirred for a required time by a circulation pump. Then, the hot and cold water in the circulation path in contact with the temperature sensor is replaced by bathtub water in the bathtub, and measurement is performed by the temperature sensor.
[0008]
[Problems to be solved by the invention]
By the way, in the reheating operation of the conventional automatic bath apparatus, a problem occurs when the water level of the bathtub is near the upper end of the suction port of the circulation path or is slightly lower than the upper end of the suction port. This half-submerged state is mainly caused by a bather scooping out hot water from the bathtub, and sucks not only bathtub water but also air from the suction port during operation of the circulation pump.
[0009]
In other words, in the half-submerged state, the water flow switch for determining the presence or absence of circulation is in an unstable state in which it is repeatedly turned on and off, so that the ignition and extinguishing of the burner are repeated almost forever.
[0010]
In such a situation, since the burner is always ignited, the temperature of the hot water gradually increases with time, and eventually exceeds the target temperature for reheating, resulting in a very high temperature of the hot water. There is a risk that it will.
[0011]
It is also pointed out that in such a situation, wasteful gas combustion increases.
[0012]
Therefore, an object of the present invention is to prevent an abnormal rise in hot water temperature caused by a partially submerged state, and to secure safety.
[0013]
[Means for Solving the Problems]
A first automatic bath apparatus of the present invention executes a reheating operation in which bath water in a bathtub is forcibly taken out to a circulation path connected to the bathtub, heated, and then returned to the bathtub. A water flow switch that is turned on / off in accordance with the presence or absence of operation, a temperature detection unit that detects the temperature of bathtub water introduced into the circulation path, and responds to an on output of the water flow switch when a reheating command is input. A controller for starting combustion in the reheating operation, and stopping the combustion in response to the OFF output, and the controller integrates an elapsed time from a combustion start time to a combustion stop time in the reheating operation. When the integrated value exceeds a required reference value, the apparatus has an abnormality countermeasure for shifting to reheating temperature control.
[0014]
In addition, the abnormality handling unit of the above-described controller includes an integrating unit that integrates an elapsed time from a combustion start time to a combustion stop time, and a first determination unit that determines whether an integrated output from the integrating unit has exceeded a required reference value. Determination means; second determination means for taking in a detection output from the temperature detection means when the first determination means determines that the temperature has exceeded the temperature, and determining whether the output is equal to or higher than a required target hot water temperature; Executing means for forcibly terminating the reheating operation when the means determines that the temperature is equal to or higher than the target hot water temperature.
[0015]
The second automatic bath apparatus of the present invention includes a reheating operation in which bath water in a bathtub is forcibly taken out to a circulation path connected to the bathtub, heated, and then returned to the bathtub, and a reheating operation to the bathtub through the circulation path. A hot water supply operation for dropping hot water is performed, a water flow switch that turns on and off according to the presence or absence of bath water circulation operation, a temperature detection unit that detects the temperature of bath water introduced into the circulation path, and a reheating When a command is input, a controller that starts combustion of the reheating operation in response to the ON output of the water flow switch, and stops the combustion in response to the OFF output, and the controller includes a reheating command Accumulates the elapsed time when the water flow switch is turned off after the input of, and when the integrated value exceeds the required reference value, it is in a semi-submerged state (the bathtub water level is near the upper end of the suction port of the circulation path or slightly lower than it. Condition) caused an abnormal situation Having abnormality handling unit for executing the hot-water supply operation so as to obtain complete deaths state from semi deaths state (certainly higher than the upper end of the suction port of the water level of the bath circulation path).
[0016]
In addition, the abnormality countermeasure unit of the controller described above determines whether or not the integrating means for integrating the elapsed time of turning off the water flow switch after the input of the reheating command and whether the integrated output from the integrating means has exceeded a required reference value. And a half-submerged state (when the water level in the bathtub is near the upper end of the suction port of the circulation path or slightly lower than that) when the judging means determines that the water level has exceeded the half-submerged state. Executing means for executing a hot water supply operation so as to be in a submerged state (a state in which the water level of the bathtub is higher than the upper end of the suction port of the circulation path).
[0017]
The third automatic bath apparatus of the present invention is a reheating operation in which bath water in a bathtub is forcibly taken out to a circulation path connected to the bathtub, heated, and then returned to the bathtub, and a reheating operation to the bathtub through the circulation path. A hot water supply operation for dropping hot water is performed, a water flow switch that turns on and off according to the presence or absence of bath water circulation operation, a temperature detection unit that detects the temperature of bath water introduced into the circulation path, and a reheating When a command is input, a controller that starts combustion of the reheating operation in response to the ON output of the water flow switch, and stops the combustion in response to the OFF output, and the controller includes a reheating command Accumulates the elapsed time when the water flow switch is turned off after the input of, and when the integrated value exceeds the required reference value, it is in a semi-submerged state (the bathtub water level is near the upper end of the suction port of the circulation path or slightly lower than it. Condition) caused an abnormal situation A first abnormality countermeasure unit for executing a hot water supply operation to change from a half-submerged state to a completely submerged state (a state where the water level of the bathtub is reliably higher than the upper end of the suction port of the circulation path), and from the start of combustion in the reheating operation A second abnormality counter that integrates the elapsed time until the combustion stop time and shifts to additional heating temperature control when the integrated value exceeds a required reference value.
[0018]
[Action]
In the first automatic bath device, the start / stop of combustion is repeated when the water flow switch is repeatedly turned on / off due to, for example, a half-submerged state. Therefore, the elapsed time from the start to the stop is integrated. By doing so, the occurrence of this abnormal situation is detected, and the control is shifted to temperature control in accordance with this detection. Thus, the hot water temperature that gradually increases due to the abnormal situation does not exceed the target temperature.
[0019]
In the second automatic bath apparatus, in short, when the water flow switch is repeatedly turned on and off due to, for example, a half-submerged state, the occurrence of this abnormal situation is detected by integrating the off time. By adding hot water to the bathtub in accordance with this detection, the half-submerged state is properly recovered from the completely submerged state. Thereby, a normal reheating operation can be performed.
[0020]
The third automatic bath device includes both functions of the first and second automatic bath devices described above. When the water flow switch is repeatedly turned on and off, the accumulated time of on (combustion) and off ( One of the functions of the first and second automatic bath apparatuses is selected according to the magnitude of the accumulated time of (non-combustion), so that the abnormal situation can be quickly resolved.
[0021]
As described above, in the present invention, even if the bathtub water level is in a half-submerged state, when the reheating command is issued, the purpose of the reheating can be achieved while ensuring safety.
[0022]
【Example】
Hereinafter, details of the present invention will be described based on the embodiment shown in FIGS. FIG. 1 is a configuration diagram of an automatic bath apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart for explaining an operation in a reheating operation mode.
[0023]
The automatic bath apparatus of this embodiment mainly includes a hot water supply circuit A, a reheating circuit B, a bath drop circuit C, a controller D, and a remote controller F.
[0024]
The hot water supply circuit A is for heating incoming water from a water supply and supplying hot water to a bathtub E and a not-shown curan. The hot water supply circuit A is provided with a heat exchanger 2, and is provided with an inlet 4 connected before and after the heat exchanger 2. The hot water path 6 is connected to the hot water path 6 by a bypass path 8, and an electromagnetic open / close type bypass valve 10 is provided in the bypass path 8.
[0025]
Further, the hot water supply circuit A is provided with a temperature sensor 12 for detecting the incoming water temperature Tc and a water amount sensor 14 for detecting the amount of incoming water Qc to the heat exchanger 2 on the side of the incoming water passage 4. On the side, a temperature sensor 16 for detecting the temperature of the hot water after the hot water from the heat exchanger 2 and the water from the bypass passage 8 are mixed, and a water amount servo valve 18 are provided. Further, a gas-fired burner 20 for heating the heat exchanger 2 is arranged.
[0026]
The reheating circuit B is for reheating while circulating hot and cold water in the bathtub E. Both ends are connected to the bathtub E, and a heat exchanger 24 for reheating and a circulation pump 26 for forced circulation are provided in the middle of the circulation path 22. A water level sensor 28 for detecting the water level of the bathtub is provided upstream of the circulation pump 26 at a position halfway to the heat exchanger 24 downstream of the circulation pump 26 in accordance with the presence or absence of the circulation water flow. A water flow switch 29 to be turned off and a temperature sensor 30 as hot water temperature detecting means for detecting the hot water temperature _TF of the bathtub E are arranged. Further, a gas combustion type burner 32 for heating the additional heat exchanger 24 is provided. Although the suction port 22a and the recirculation port 22b of the circulation path 22 have a double pipe structure at the connection portion with the bathtub E, they may be separately connected to the bathtub E.
[0027]
The bath drop circuit C is for connecting the hot water supply circuit A and the additional heating circuit B to drop hot water into the bathtub E, and one end thereof is provided with a water amount servo valve 18 of the tapping path 6 of the hot water supply circuit 1. The other end is connected to the downstream side, and the other end is connected to the upstream side of the circulation pump 26. A vacuum breaker 34, an electromagnetic opening / closing type drop valve 36, and a check valve 38 are sequentially provided at an intermediate position of the bath drop circuit C.
[0028]
The controller D is constituted by, for example, a microcomputer, and receives input data from a remote controller F described below and temperature sensors 12, 16, 30, provided in the hot water supply circuit A, the additional heating circuit B, and the bath drop-in circuit C. Based on detection signals from the water amount sensor 14, the water level sensor 28, and the water flow switch 29, the operation of each valve 10, 18, 36 and each movable part of the circulation pump 26 is controlled, and the combustion control of each burner 20, 32 is controlled. Is what you do.
[0029]
Remote control device F, as the controller D, hot water filling operation to bath E, and various modes, such as add-fired operation, the desired time or when bathing water heater set hot water temperature T _s etc. for setting input In addition, on the operation panel, a reheating switch 50 that is operated when it is desired to immediately raise the current hot water temperature, and an automatic operation switch 51 that is operated when it is desired to automatically lower the temperature or reheat the heated water, are provided. Including various switches.
[0030]
In particular, as will be described later, the controller D of the present example responds to a command from the reheating switch 50 of the remote control device F and shifts to reheating temperature control after a lapse of a predetermined time from the start of reheating combustion. It is programmed to execute a sequence, and has a first abnormality coping unit 40 and a second abnormality coping unit 42.
[0031]
The first abnormality coping unit 40 accumulates the elapsed time of turning off the water flow switch 29 after the input of the reheating command, and when the accumulated value exceeds a required reference value, the semi-submerged state (the water level of the bathtub E is circulated). An abnormal situation caused by the vicinity of the upper end of the suction port 22a of the passage 22 or a state slightly lower than the lower end thereof causes the water level of the bathtub to be surely higher than the upper end of the suction port 22a of the circulation path 22 from the half-submerged state to the completely submerged state. State) to execute the hot water supply operation.
[0032]
The second abnormality coping unit 42 integrates the elapsed time from the combustion start time to the combustion stop time in the reheating operation, and shifts to the reheating temperature control when the integrated value exceeds a required reference value. .
[0033]
Next, the operation of the reheating operation when the reheating switch 50 of the automatic bath apparatus having the above configuration is operated will be described with reference to the flowchart shown in FIG.
[0034]
Now, if the add-fired switch 50 of the remote control device F has been operated (Step 1), first, first to third integrating timer _{T 1,} T 2, and _{T 3} is reset (Step 2), a bath E The circulation pump 26 arranged in the middle of the connected circulation path 22 is activated to start circulation of hot and cold water in the bathtub E (see a solid arrow in FIG. 1) (step 3).
[0035]
Then, before igniting the reburning burner 32 and starting reburning combustion, it is determined whether or not the water flow switch 29 is ON (step 4). The water flow switch 29 may be repeatedly turned on and off when the bathtub water level is in a half-submerged state. When the water flow switch 29 is repeatedly turned on and off, an abnormal situation occurs in which the reburning burner 32 is repeatedly ignited and extinguished.
[0036]
If the water flow switch 29 is off at step 4, the flow proceeds to steps 5 to 11, while if the water flow switch 29 is on, the flow proceeds to steps 12 to 14.
[0037]
Steps 5 to 11 of the former are based on whether an abnormal situation has occurred due to the water level of the bathtub being half-submerged, or an extreme bathtub due to an abnormal circulation pump or the drain plug of the bathtub E being pulled out. It is for checking whether or not abnormal situations have occurred due to water shortage, and when these abnormal situations have occurred, processing is performed so as to avoid them. That is, in step 5, the first and second integration timers T ₁ and T ₂ for integrating the elapsed time of turning off the water flow switch 29 are started. The first integrating timer _{T 1,} for example to 1 minute, second integrating timer _{T 2} are, respectively set, for example 5 _minutes, is a relationship of T 1 _{<T 2.} First integration timer T ₁ is determined whether or not the time is up (Step 6). The first integration timer T ₁ is only once when the timer expires (step 7) stops the circulating pump 26 (step 8), adding hot water only to eliminate half deaths state (for example, 10 liters) after performing (step 9), but returns to the step 3, when (step 7) in which the first integration timer T ₁ is carried out once the hot water treatment plus be in or the time up when not in time is up second integrating timer T ₂ determines whether or not the time is up (step 10). Force the second when the accumulated timer T ₂ has timed up, add-fired operation is determined to be dangerous as abnormal or adding bath water level of the bath E even if the hot water treatment of the circulation pump 29 is insufficient The process ends (step 11), but if the time is not up, the process returns to step 4. The hot water treatment in step 9 described above is regarded as an occurrence of an abnormal situation due to the water level of the bathtub water being in a partially submerged state, and the abnormal situation is eliminated from the half-submerged state to the completely submerged state. It is for doing. In the case of this hot water treatment, it becomes a broken line arrow in FIG. 1, and the suction side of the circulation path 22 at the time of the additional heating operation is a dropping path into the bathtub E.
[0038]
The latter steps 12 to 14 are for starting combustion assuming that the bathtub water level is sufficient. That is, in step 12, the integration by the first and second integration timers T ₁ and T ₂ is stopped, the reburning burner 32 is ignited (step 13), and the elapsed time from the start of combustion to the stop of combustion is integrated. to start the third integrating timer _{T 3} (step 14). The third integrating timer _{T 3} is set to, for example, 30 seconds.
[0039]
After the combustion is started in this way, it is determined again whether or not the water flow switch 29 is on, as in step 4 (step 15). Here, if the water flow switch 29 is off, the flow proceeds to steps 16 to 18, while if the water flow switch 29 is on, the flow proceeds to steps 19 to 22.
[0040]
In the former steps 16 to 18, even when an abnormal situation occurs due to the bathtub water being in a half-submerged state, the combustion control is started once because the water flow switch 29 is turned on in step 4. Therefore, this combustion is to be stopped. That is, in step 16, the first and second accumulation timers T ₁ and T ₂ are started, the reburning burner 32 is extinguished (step 17), and the accumulation by the third accumulation timer T ₃ is stopped (step 18). , And return to step 4.
[0041]
The latter steps 19 to 22 are processes relating to additional heating temperature control for heating to the target temperature. That is, it is determined third accumulation timer T ₃ is whether the time is up at step 19. When the third integration timer T ₃ has not timed up, but wait to time-up returns to the step 15, when the time is up, the detection output the output captures (current water temperature) from the temperature sensor 30 is It is determined whether the temperature is equal to or higher than the required target hot water temperature (step 20). When the temperature is lower than the target hot water temperature, the process returns to step 15, while when the temperature reaches the target temperature, the reheating burner 32 is extinguished (step 21), the circulation pump 29 is stopped (step 22), and the reheating operation is performed. finish.
[0042]
As described above, when the reheating operation is requested and the water level of the bathtub E is unstable such as a semi-submerged state, the semi-submerged state is eliminated and the reheating operation is performed again, or the combustion is stopped. It is possible to selectively perform whether to prevent abnormal rise in hot water temperature and ensure safety while allowing repetition of ON / OFF. That is, in any case, when the reheating command is issued, the purpose of the reheating can be achieved while ensuring safety.
[0043]
Note that the present invention is not limited to the above-described embodiment, and various modifications and applications as described below can be considered.
[0044]
(1) The controller D may not be configured to have both the first abnormality coping unit 40 and the second abnormality coping unit 42, but may be configured to have only one of them. However, when the controller D has a configuration including only the second abnormality coping unit 42, the automatic bath apparatus may be configured to omit the hot water supply circuit A and the bathtub dropping circuit C.
[0045]
(2) The above-described embodiment is an example of a case in which additional heating is performed to a certain hot water temperature in response to a bather's request. However, as another automatic bath device, the heat retention after the automatic dropping of hot water into the bathtub E is performed. When the automatic reheating is performed at predetermined time intervals in the operation, for example, when the automatic operation switch 51 of the remote control device F is operated, the first abnormality handling unit 40 described above is used in the automatic reheating sequence in the warming operation. And / or the second abnormality handling unit 42.
[0046]
(3) In an automatic bath apparatus having a configuration in which the shortage amount can be reduced in order to keep the amount of bathtub water stored in the bathtub E constant, the amount of hot water in the hot water treatment in step 9 is set to a certain amount (for example, 10 liters). ), But may be a shortage. Then, if an abnormality of the circulation pump 26 or forgetting of the drain plug of the bathtub E is separately detected, and if there is a configuration that operates safely, the second integration timer is omitted, steps 10 and 11 are omitted, and steps 6 to 4 are omitted. May be returned.
[0047]
(4) as the target temperature in the add-fired operation, and the set temperature T _s, the value and was higher by 1 ℃ or 2 ℃ from the set temperature T _s, and as high as 1 ℃ or 2 ℃ from the current water temperature T _F Any of the values may be selectively set.
[0048]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0049]
In the first automatic bath apparatus, even in the half-submerged state, it is possible to comfortably take a bath within the target temperature range. The required reheating operation can be achieved after ensuring the safety of the plant.
[0050]
In the second automatic bath apparatus, even in the half-submerged state, it can be properly restored to the completely submerged state, and the proper reheating operation can be performed. The desired refire operation can be achieved relatively quickly and safely without burning.
[0051]
In the third automatic bath apparatus, the functions and effects of both the first and second automatic bath apparatuses can be achieved. When the water flow switch is repeatedly turned on and off, the on (combustion) is integrated. Since one of the functions of the first and second automatic bath apparatuses is selected according to the magnitude of the time and the integrated time of off (non-combustion), the abnormal situation can be quickly resolved.
[0052]
As described above, in the present invention, even if the bathtub water level is in a half-submerged state, when the reheating command is issued, the purpose of the reheating can be achieved while ensuring safety.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an automatic bath apparatus according to one embodiment of the present invention.
FIG. 2 is a flowchart for explaining an operation of a reheating operation of the apparatus.
[Explanation of symbols]
A hot water supply circuit B additional heating circuit 22 additional heating circuit circulation path 22a additional circulation circuit suction port 26 additional heating circuit circulation pump 29 additional heating circuit water switch 30 additional heating circuit temperature sensor 32 additional heating circuit burner C Circuit D Controller 40 First abnormality handling unit 42 of controller Second abnormality handling unit E of controller Bathtub F Remote control device 50 Reheating switch of remote control device

Claims (5)

An automatic bath apparatus that performs a reheating operation in which bath water in a bath tub is forcibly taken out to a circulation path connected to the bath tub, heated, and then returned to the bath tub,
A water flow switch that is turned on and off in accordance with the presence or absence of a bathtub water circulation operation, a temperature detection unit that detects the temperature of the bathtub water introduced into the circulation path, and when a reheating command is input, the water flow switch is turned on. A controller that starts the combustion of the reheating operation in response to the output, and stops the combustion in response to the off output,
Further, the controller has an abnormality handling unit that integrates the elapsed time from the start of combustion to the stop of combustion in the reheating operation, and shifts to the reheating temperature control when the integrated value exceeds a required reference value. , An automatic bath device. An abnormality countermeasure unit of the controller, an integrating means for integrating an elapsed time from a combustion start time to a combustion stop time, and a first determining means for determining whether an integrated output from the integrating means has exceeded a required reference value. A second determining means for taking in a detection output from the temperature detecting means when the first determining means determines that the temperature has exceeded the temperature, and determining whether the output is equal to or higher than a required target hot water temperature; 2. The automatic bath apparatus according to claim 1, further comprising: execution means for forcibly terminating the reheating operation when it is determined that the temperature is equal to or higher than the hot water temperature. An automatic bath that performs a reheating operation in which bath water in a bathtub is forcibly taken out into a circulation path connected to the bathtub, heated and then returned to the bathtub, and a hot water supply operation in which hot water is dropped into the bathtub through the circulation path. A device,
A water flow switch that is turned on and off in accordance with the presence or absence of a bathtub water circulation operation, a temperature detection unit that detects the temperature of the bathtub water introduced into the circulation path, and when a reheating command is input, the water flow switch is turned on. A controller that starts the combustion of the reheating operation in response to the output, and stops the combustion in response to the off output,
In addition, the controller integrates the elapsed time of turning off the water flow switch after input of the reheating command, and when the integrated value exceeds a required reference value, the controller is in a semi-submerged state (when the water level in the bathtub is equal to the inlet of the circulation path). The hot water supply operation is performed in order to change from a half-submerged state to a completely submerged state (a state in which the water level of the bathtub is higher than the upper end of the suction port of the circulation path) as an abnormal situation caused by the occurrence of an abnormal situation caused by the vicinity of the upper end of the bathtub or slightly lower than the upper end. An automatic bath apparatus having an abnormality coping unit to be executed. An abnormality coping unit of the controller is an integrating means for integrating the elapsed time of turning off the water flow switch after the input of the reheating command, and a determining means for determining whether or not the integrated output from the integrating means has exceeded a required reference value. When the determination means determines that the water level has exceeded the half-submerged state (the state in which the water level in the bathtub is near the upper end of the suction port of the circulation path or slightly lower than that), the half-submerged state to the complete submerged state ( 4. The automatic bath apparatus according to claim 3, further comprising: an execution unit configured to execute a hot water supply operation so that a water level of the bathtub is reliably higher than an upper end of a suction port of the circulation path. An automatic bath that performs a reheating operation in which bath water in a bathtub is forcibly taken out into a circulation path connected to the bathtub, heated and then returned to the bathtub, and a hot water supply operation in which hot water is dropped into the bathtub through the circulation path. A device,
A water flow switch that is turned on and off in accordance with the presence or absence of a bathtub water circulation operation, a temperature detection unit that detects the temperature of the bathtub water introduced into the circulation path, and when a reheating command is input, the water flow switch is turned on. A controller that starts the combustion of the reheating operation in response to the output, and stops the combustion in response to the off output,
In addition, the controller integrates the elapsed time of turning off the water flow switch after input of the reheating command, and when the integrated value exceeds a required reference value, the controller is in a semi-submerged state (when the water level in the bathtub is equal to the inlet of the circulation path). The hot water supply operation is performed in order to change from a half-submerged state to a completely submerged state (a state in which the water level of the bathtub is higher than the upper end of the suction port of the circulation path) as an abnormal situation caused by the occurrence of an abnormal situation caused by the vicinity of the upper end of the bathtub or slightly lower than the upper end. A first abnormality handling unit to be executed;
A second abnormality handling unit that integrates the elapsed time from the combustion start time to the combustion stop time in the reheating operation and shifts to the reheating temperature control when the integrated value exceeds a required reference value. A featured automatic bath device.

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