JP2021148342A - Bath device - Google Patents

Abstract

To enhance the accuracy for determining whether hot water in a bathtub is deficient or not while suppressing lowering of durability of a bath pump in circulation of hot water in the bathtub.SOLUTION: A bath device circulates hot water in a bathtub by a bath circuit by operating a bath pump provided in the bath circuit, and stops the bath pump upon determination of deficiency of hot water in the bathtub when flow of hot water is not detected by circulation detection means (water flow switch) of the bath circuit even after the bath pump is operated and a prescribed standby time passes. The standby time is set on the basis of a determination result of whether hot water in the bath pump is less than a prescribed amount or not, and the standby time is set to be longer when it is determined that hot water in the bath pump is equal to or more than a prescribed amount than when it is determined that hot water in the bath pump is less than a prescribed amount.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bath device capable of circulating hot water in a bathtub by a bath circuit.

As an example of a bath device capable of circulating hot water in a bathtub by a bath circuit, there is one having a reheating function for reheating the hot water in the bathtub (for example, Patent Document 1). In reheating, the hot water in the bathtub is circulated and heated in the heating section by operating the bath pump provided in the bath circuit connecting the bathtub and the heating section. Such a bath circuit is provided with a water flow switch that detects the flow of hot water, and if the flow of hot water is not detected by the water flow switch even if the bath pump operates, there is not enough hot water in the bathtub (insufficient). The bath pump is stopped and reheating (circulation of hot water) is stopped without heating in the heating part.

Further, even if there is sufficient hot water in the bathtub, air may exist in a part of the bath circuit and the hot water is not filled, and the flow of hot water may not be detected by the water flow switch due to the influence of the air. A self-priming pump is generally used for the bath pump, and if there is enough hot water in the bathtub, the air in the bath circuit is discharged and the hot water is discharged by continuing the operation of the bath pump. Can be circulated. Therefore, if the operation of the bath pump can be continued for a predetermined time and the flow of hot water is detected by the water flow switch within the predetermined time, it is assumed that there is sufficient hot water in the bathtub and heated by the heating unit. To execute. Then, by setting such a predetermined time for a long time, it is possible to improve the accuracy of determining whether or not the hot water in the bathtub is insufficient.

Japanese Unexamined Patent Publication No. 2006-284026

However, for example, due to long-term non-use, there may be no hot water (dry) not only in the bath circuit but also in the bath pump, and the bath pump continues to operate for a long time in such a state. Then, there is a problem that the durability is lowered due to the wear of the shaft portion of the bath pump.

The present invention has been made in response to the above-mentioned problems in the prior art, and whether or not the hot water in the bathtub is insufficient while suppressing the deterioration of the durability of the bath pump when circulating the hot water in the bathtub. The purpose is to provide a bathtub device that can improve the accuracy of judgment.

In order to solve the above-mentioned problems, the bath device of the present invention adopts the following configuration. That is,
In a bath device that can circulate hot water in the bathtub with a bath circuit
A bath pump provided in the bath circuit to transfer hot water and
A circulation detecting means for detecting the flow of hot water in the bath circuit and
When the flow of hot water is not detected by the circulation detecting means even after the bath pump is operated and a predetermined waiting time elapses, the bathtub state determining means for determining that the hot water in the bathtub is insufficient, and the bathtub state determining means.
A pump state determination means for determining whether or not the amount of hot water in the bath pump is less than a predetermined amount, and
It is provided with a standby time setting means for setting the standby time based on the determination result by the pump state determination means.
The standby time setting means determines that the amount of hot water in the bath pump is equal to or greater than the predetermined amount, as compared with the case where the pump state determining means determines that the amount of hot water in the bath pump is less than the predetermined amount. It is characterized in that the waiting time in the case of the above is set long.

Here, the "predetermined amount of hot water in the bath pump" in the present invention means that the inside of the bath pump is moistened to the extent that wear of the shaft portion of the bath pump due to the operation of the bath pump can be suppressed. The amount of hot water.

In such a bath device of the present invention, when it is determined that the amount of hot water in the bath pump is less than a predetermined amount (not moistened), the shaft portion of the bath pump is easily worn, so that the time is short. By determining that there is insufficient hot water in the bathtub early based on the undetected circulation detection means in the standby time, it is possible to limit the operation of the bath pump and suppress the deterioration of durability. On the other hand, when it is determined that the amount of hot water in the bath pump is more than the specified amount (moist), the shaft part of the bath pump is not easily worn, so the bath pump operates over a long standby time. This makes it possible to exhaust the air in the bath circuit and improve the accuracy of determining that there is sufficient hot water in the bathtub.

In the bath device of the present invention described above, when a predetermined period has elapsed since the circulation detecting means previously detected a flow of hot water that continues for a specified time or longer, the amount of hot water in the bath pump is less than a predetermined amount. On the other hand, if the predetermined period has not passed, it may be determined that the amount of hot water in the bath pump is equal to or more than the predetermined amount.

Here, the "predetermined period" in the present invention is the shortest period during which it is possible to guarantee that a predetermined amount or more of hot water remains in the bath pump after the bath pump is once filled with hot water. Is. For example, even if the anti-freezing heater continues to operate after the bath circuit is drained by draining the hot water in the bathtub, a predetermined amount or more of the hot water remains in the bath pump without fail. The period of time can be set to a predetermined period.

In such a bath device of the present invention, if a predetermined period has not elapsed since the circulation detecting means previously detected the flow of hot water that continues for a specified time or longer, the circulation of hot water is normal in the bath circuit within the predetermined period. Since the hot water has passed through the bath pump, the amount of hot water in the bath pump is more than the specified amount (moisturized) even if the hot water in the bath pump is not directly detected. ) Can be easily determined. In addition, it is possible to suppress erroneous judgments caused by the momentary flow of hot water in the bath circuit that does not affect the hot water in the bath pump, provided that the flow of hot water continues for a specified time or longer, not just the flow of hot water. It becomes.

Further, in the bath device of the present invention described above, when a predetermined operation unit is operated by the user, hot water is supplied to the bathtub via the bath pump, and a predetermined period of time has passed since the operation unit was last operated. When it has passed, it is judged that the amount of hot water in the bath pump is less than the predetermined amount, whereas when the predetermined period has not passed, it is judged that the amount of hot water in the bath pump is more than the predetermined amount. May be good.

In such a bath device of the present invention, if a predetermined period has not elapsed since the operation unit was last operated, it means that the hot water has flowed into the bath pump as the hot water is supplied to the bathtub within the predetermined period. Therefore, even if the hot water in the bath pump is not directly detected, it can be easily determined that the hot water in the bath pump is equal to or more than a predetermined amount (moist).

Further, the bath device of the present invention described above is provided with an on-off valve that opens and closes the upstream side of the bath pump in the path of supplying hot water to the bathtub via the bath pump, for a predetermined period from the previous opening of the on-off valve. Is determined that the amount of hot water in the bath pump is less than the specified amount, whereas when the specified period has not passed, it is determined that the amount of hot water in the bath pump is more than the specified amount. You may.

In such a bath device of the present invention, if a predetermined period has not passed since the previous opening of the on-off valve, the hot water has flowed into the bath pump as the hot water is supplied to the bathtub within the predetermined period. Therefore, even if the hot water in the bath pump is not directly detected, it can be easily determined that the hot water in the bath pump is equal to or more than a predetermined amount (moist).

Further, the bath device of the present invention described above is provided with a supply detecting means for detecting the flow of hot water in a path for supplying hot water to the bathtub via a bath pump, and the hot water continues for a certain period of time or more last time by the supply detecting means. When a predetermined period has passed since the flow of water was detected, it is determined that the amount of hot water in the bath pump is less than the predetermined amount, whereas when the predetermined period has not passed, the hot water in the bath pump is determined to be less than the predetermined amount. May be determined to be greater than or equal to a predetermined amount.

In such a bath device of the present invention, if a predetermined period has not elapsed since the previous detection of the flow of hot water that continues for a certain period of time or more by the supply detecting means, the hot water is supplied to the bathtub within the predetermined period. Since the hot water has flowed into the bath pump, it is easy to determine that the hot water in the bath pump is more than the specified amount (moist) without directly detecting the hot water in the bath pump. be able to. In addition, it is possible to suppress erroneous judgments caused by the instantaneous flow of hot water in the path that does not affect the hot water in the bath pump by setting the condition that it continues for a certain period of time or longer, not just the flow of hot water. Become.

It is explanatory drawing which shows the whole structure of the bath apparatus 1 of this Example. It is a flowchart of the reheating control process executed by the controller 60 of this embodiment. It is a flowchart of the pump state determination process of this Example executed in the reheating control process. It is a flowchart of the pump state determination process of the 1st modification. It is a flowchart of the pump state determination process of the 2nd modification. It is a flowchart of the pump state determination process of the 3rd modification.

FIG. 1 is an explanatory diagram showing an overall configuration of the bath device 1 of the present embodiment. The bath device 1 has not only a hot water filling function for storing hot water in the bath tub 2 but also a reheating function for circulating and reheating the hot water in the bath tub 2. The bath device 1 of this embodiment is provided with a hot water supply unit 10 that heats the supplied clean water to generate hot water, and a bath heating unit 11 that heats the hot water in the circulating bathtub 2. The hot water supply unit 10 is provided with a hot water supply burner 12 for burning fuel gas, and a hot water supply heat exchanger 13 is provided above the hot water supply burner 12. Further, a combustion fan 14 is provided below the hot water supply burner 12, and combustion air is sent to the hot water supply burner 12.

Similar to the hot water supply unit 10, the bath heating unit 11 is provided with a bath burner 15 for burning fuel gas, and a bath heat exchanger 16 is provided above the bath burner 15. Further, combustion air is sent to the bath burner 15 by the combustion fan 14.

The gas pipe 20 for supplying the fuel gas is provided with a main valve 21 for opening and closing the gas pipe 20 and a proportional valve 22 for adjusting the flow rate of the fuel gas passing through the gas pipe 20. Further, the gas pipe 20 is branched into two on the downstream side of the proportional valve 22 and is connected to the hot water supply burner 12 and the bath burner 15, and the hot water supply solenoid valve 23 and the bath that open and close each of the branched pipes are opened and closed. A solenoid valve 24 is provided.

Clean water is supplied to the hot water supply heat exchanger 13 of the hot water supply unit 10 through the water supply pipe 30, and the supplied clean water is heat from the combustion exhaust from the hot water supply burner 12 in the hot water supply heat exchanger 13. After being heated by exchange, it becomes hot water and flows out to the hot water pipe 35. The water supply pipe 30 connected to the upstream side of the hot water supply heat exchanger 13 is provided with a water supply main plug 31 for opening and closing the water supply pipe 30, and a water drain plug for draining water downstream from the water supply main plug 31. 32 is provided. Further, the water supply pipe 30 is provided with a water amount sensor 33 for detecting the flow rate of clean water flowing through the water supply pipe 30, and combustion in the hot water supply burner 12 is controlled according to the flow rate detected by the water amount sensor 33. NS.

The hot water outlet pipe 35 connected to the downstream side of the hot water supply heat exchanger 13 is connected to the curan 36, and is provided with a drain plug 37 on the way to the curan 36. Further, a hot water filling pipe 40 for supplying hot water to the bathtub 2 is branched from the hot water discharge pipe 35. The hot water filling pipe 40 includes a hot water filling solenoid valve 41 that opens and closes the hot water filling pipe 40, a check valve 42 that prevents backflow from the bathtub 2 side, and an amount of hot water that detects the flow rate of hot water flowing through the hot water filling pipe 40. A sensor 43 is provided.

A bath circuit 50 that circulates hot water in the bathtub 2 is connected to the bath heat exchanger 16 of the bath heating unit 11 with a circulation metal fitting 3 that opens at the lower side surface of the bathtub 2. The bath circuit 50 includes a bath return pipe 51 and a bath going pipe 52, and the bath return pipe 51 includes a bath pump 53 and a bath pump 53 that suck hot water from the bathtub 2 and send it to the bath heat exchanger 16. A water flow switch 54 for detecting the flow of hot water above a certain level in the bath return pipe 51 to and from the bath heat exchanger 16 and a bath temperature sensor 55 for detecting the temperature of the hot water sucked out from the bathtub 2 are provided. ing. At the time of reheating, the bath pump 53 operates, and the hot water sucked out from the bathtub 2 is sent to the bath heat exchanger 16 through the bath return pipe 51, and the bath burner is sent by the bath heat exchanger 16. After being heated by heat exchange with the combustion exhaust from 15, it returns to the bathtub 2 again through the bath going pipe 52. The water flow switch 54 of this embodiment corresponds to the "circulation detecting means" of the present invention.

Further, the hot water filling pipe 40 described above is connected to the upstream side (bathtub 2 side) of the bath pump 53 in the bath return pipe 51 of the bath circuit 50. At the time of hot water filling, the hot water filling solenoid valve 41 is opened, and the hot water generated by the hot water supply unit 10 is supplied from the hot water filling pipe 40 to the bathtub 2 through the bath circuit 50. At this time, the bath pump 53 does not operate, and the hot water flowing from the hot water filling pipe 40 into the bath return pipe 51 passes through the route flowing toward the upstream of the bath pump 53 (passing through the bath return pipe 51 without passing through the bath pump 53). It is supplied to the bathtub 2 by both the route) and the route flowing toward the downstream of the bath pump 53 (the route passing through the bath going pipe 52 via the bath pump 53 and the bath heat exchanger 16). The hot water in the bathtub 2 is discharged by pulling out the drain plug 5 that closes the drain port 4 at the bottom of the bathtub 2.

Further, the bath device 1 is equipped with a controller 60 that controls the entire device, and includes the above-mentioned combustion fan 14, main valve 21, proportional valve 22, hot water supply solenoid valve 23, bath solenoid valve 24, and water amount sensor 33. , The hot water filling solenoid valve 41, the hot water amount sensor 43, the bath pump 53, the water flow switch 54, the bath temperature sensor 55, and the like are electrically connected to the controller 60. The controller 60 has a built-in storage unit 61, and can store a history related to control as described later.

Further, a remote controller 62 that can be operated by the user is electrically connected to the controller 60. The remote controller 62 of this embodiment includes a setting button 63 for setting the amount and temperature of hot water in the bathtub 2, a hot water filling button 64 for instructing hot water filling, a reheating button 65 for instructing reheating, and a bathtub 2. It is equipped with various operation buttons such as a hot water button 66 that instructs the hot water to be added to the bathtub 2 and a water button 67 that instructs the hot water to be added to the bathtub 2 without heating the water, and the setting status of the bath device 1. It is provided with a display unit 68 capable of displaying the operating status and the like.

When the hot water filling button 64 is operated, the controller 60 opens the hot water filling solenoid valve 41 and, according to the flow rate of clean water detected by the water amount sensor 33, the combustion fan 14, the main valve 21, and the proportional valve 22. , The hot water supply solenoid valve 23, the spark plug (not shown), and the like are controlled to start combustion in the hot water supply burner 12. As a result, the hot water generated by the hot water supply unit 10 is supplied to the bathtub 2 through the hot water outlet pipe 35, the hot water filling pipe 40, and the bath circuit 50. The amount of hot water supplied to the bathtub 2 can be grasped (calculated) based on the flow rate detected by the hot water amount sensor 43, and when the set amount of hot water is reached, the hot water filling solenoid valve 41 is closed to end the hot water filling. do.

Further, when the hot water button 66 is operated, the controller 60 opens the hot water filling solenoid valve 41 and starts combustion in the hot water supply burner 12 in the same manner as in the case of hot water filling, thereby causing the hot water supply unit 10 to start combustion. The generated hot water is supplied to the bathtub 2 through the hot water outlet pipe 35, the hot water filling pipe 40, and the bath circuit 50. Then, when a specified amount (for example, 20 L) of hot water is supplied to the bathtub 2, the hot water filling solenoid valve 41 is closed to end the additional hot water. On the other hand, the controller 60 opens the hot water filling solenoid valve 41 when the additional water button 67 is operated, but does not start combustion in the hot water supply burner 12, so that unheated water is discharged from the hot water filling pipe 35 and the hot water filling. It is supplied to the bathtub 2 through the pipe 40 and the bath circuit 50. Then, when a specified amount (for example, 10 L) of water is supplied to the bathtub 2, the hot water filling solenoid valve 41 is closed and the water is added to end the water.

Further, when the reheating button 65 is operated, the controller 60 first operates the bath pump 53, and when the state in which the flow of hot water is detected by the water flow switch 54 continues for a predetermined time, the combustion fan 14 or the original Combustion in the bath burner 15 is started by controlling the valve 21, the proportional valve 22, the bath solenoid valve 24, the spark plug (not shown), and the like. As a result, the hot water sucked out from the bathtub 2 is heated by the combustion exhaust while passing through the bath heat exchanger 16 and is supplied to the bathtub 2 again. The temperature of the hot water in the bathtub 2 can be detected by the bath temperature sensor 55, and when the set hot water temperature is reached, the bath pump 53 is stopped to end the reheating.

In such a bath device 1, even if the bath pump 53 operates during reheating, if the flow of hot water is not detected by the water flow switch 54, there is not enough hot water in the bathtub 2 (the water level of the bathtub 2 circulates). Since there is a possibility that it has not reached the metal fitting 3), in order to prevent empty heating, the bath pump 53 is stopped and the reheating (circulation of hot water) is stopped without starting the combustion in the bath burner 15. .. On the other hand, even if there is sufficient hot water in the bathtub 2, air is present in a part of the bath circuit 50 and the hot water is not filled, and the flow of hot water is not detected by the water flow switch 54 due to the influence of the air. There is. In such a case, since a self-priming pump is used for the bath pump 53, the air in the bath circuit 50 can be discharged by continuing the operation of the bath pump 53, and the flow of hot water with the water flow switch 54. When is detected, combustion in the bath burner 15 is started. However, there may be no hot water (dry) not only in the bath circuit 50 but also in the bath pump 53 due to non-use for a long period of time, and if the operation of the bath pump 53 is continued for too long in that state, Durability is reduced due to wear of the shaft portion of the bath pump 53. Therefore, in the bath device 1 of the present embodiment, the accuracy of determining whether or not the hot water in the bathtub 2 is insufficient (whether or not the bath pump 53 is stopped) while suppressing the deterioration of the durability of the bath pump 53. The controller 60 is adapted to execute the following reheating control process in order to make it possible to increase the value.

FIG. 2 is a flowchart of the reheating control process executed by the controller 60 of this embodiment. This reheating control process is executed when the reheating button 65 is operated by the user. In the reheating control process, first, the bath pump 53 is operated (STEP 1), and the following pump state determination process is executed in order to determine the state in the bath pump 53 (STEP 2).

FIG. 3 is a flowchart of the pump state determination process of the present embodiment executed in the reheating control process. In the pump state determination process of this embodiment, first, the previous operation history of the last operated operation button (hereinafter referred to as the latest operation button) among the hot water filling button 64, the adding hot water button 66, and the adding water button 67 is displayed. Read from the storage unit 61 (STEP 20). As described above, the controller 60 has a built-in storage unit 61, and it is possible to store the history of operations of the hot water filling button 64, the adding hot water button 66, and the adding water button 67 by the user. be.

Next, based on the read operation history, it is determined whether or not a predetermined period has elapsed since the latest operation button was last operated (STEP 21). Then, when the predetermined period has not elapsed since the previous operation of the latest operation button (STEP21: no), it is determined that the amount of hot water in the bath pump 53 is equal to or more than the predetermined amount (STEP22). The predetermined amount here is the amount of hot water in which the inside of the bath pump 53 is moistened to the extent that wear of the shaft portion of the bath pump 53 can be suppressed. The predetermined period is the shortest period during which it is possible to guarantee that a predetermined amount or more of hot water remains in the bath pump 53 after the bath pump 53 is once filled with hot water. For example, even if the heater for preventing freezing (not shown) continues to operate after the bath circuit 50 is drained by draining the hot water in the bathtub 2, a predetermined amount or more of the hot water is still in the bath pump 53. The period that remains within the room can be set to a predetermined period. In the bath device 1 of this embodiment, 24 hours is set as a predetermined period.

As described above, hot water or water is discharged in any of the hot water filling performed by operating the hot water filling button 64, the adding hot water performed by operating the adding hot water button 66, and the adding water performed by operating the adding water button 67. It is supplied to the bathtub 2 through the pipe 35, the hot water filling pipe 40, and the bath circuit 50. At this time, a part of the hot water or water flowing from the hot water filling pipe 40 into the bath return pipe 51 is supplied to the bathtub 2 via the bath pump 53 through the bath going pipe 52. Therefore, if a predetermined period has not passed since the previous operation of the latest operation button, the hot water has flowed into the bath pump 53 along with the supply of the hot water to the bathtub 2 within the predetermined period, so that the hot water has flowed into the bath pump 53. Can be judged to be sufficiently moisturized.

On the other hand, when a predetermined period has passed since the previous operation of the latest operation button (STEP21: yes), the bath pump 53 of the bath circuit 50 is installed in the bathtub 2 for a long period of at least the predetermined period (24 hours) or more. Since hot water is not supplied through the bath pump 53 and the inside of the bath pump 53 may be dry, it is determined that the amount of hot water in the bath pump 53 is less than a predetermined amount (STEP 23). When the state of the hot water in the bath pump 53 is determined based on the operation history of the hot water filling button 64, the additional hot water button 66, and the additional water button 67, the pump state determination process of FIG. 3 is terminated and the reheating control of FIG. 2 is performed. Return to processing. The controller 60 of this embodiment corresponds to the "pump state determination means" of the present invention. Further, the hot water filling button 64, the adding hot water button 66, and the adding water button 67 of this embodiment correspond to the "operation unit" of the present invention.

Here, as described above, in the pump state determination process of the present embodiment, the amount of hot water in the bath pump 53 is less than a predetermined amount or a predetermined amount, depending on whether or not a predetermined period has elapsed from the previous operation of the latest operation button. Although it is judged whether it is the above, the control for judging is not limited to this. For example, the operation history of the hot water filling button 64, the adding hot water button 66, and the adding water button 67 in a predetermined period (24 hours) before operating the bath pump 53 is read from the storage unit 61, and the hot water filling button 64 is read within the predetermined period. When any of the addition hot water button 66 and the addition water button 67 is operated, it is determined that the amount of hot water in the bath pump 53 is equal to or more than the predetermined amount, whereas the hot water filling button 64 and the addition water button 64 are added within the predetermined period. If neither the hot water button 66 nor the additional water button 67 is operated, it may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount. Further, when any of the hot water filling button 64, the adding hot water button 66, and the adding water button 67 is operated, the operation flag stored in the storage unit 61 is set to ON, and a predetermined period (24 hours) has elapsed since then. Then, by setting the operation flag to OFF, when operating the bath pump 53, if the operation flag is ON, it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount, whereas the operation flag is set. If it is OFF, it may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount.

In the reheating control process of FIG. 2, it is subsequently determined whether or not the amount of hot water in the bath pump 53 is less than a predetermined amount according to the determination result in the pump state determination process (STEP 2) (STEP 3). Then, when it is determined that the amount of hot water in the bath pump 53 is less than a predetermined amount (STEP3: yes), the standby time is set to the first hour (for example, 30 seconds) (STEP4). Here, the standby time is an upper limit time during which the bath pump 53 can be kept on standby while continuing to operate.

On the other hand, when it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount (STEP3: no), the standby time is set to the second time (for example, 10 minutes) longer than the first time (for example, 10 minutes). STEP5). The controller 60 of this embodiment corresponds to the "standby time setting means" of the present invention. After setting the standby time in this way, it is determined whether or not the water flow switch 54 is in the ON state (STEP 6). In the bath device 1 of the present embodiment, the bath pump 53 has a transfer capacity (discharge amount) of 6 L / min, and the water flow switch 54 has a flow of hot water of 3 L / min or more in the bath circuit 50. Turns on. Therefore, there is sufficient hot water in the bathtub 2 having a water level higher than that of the circulation metal fitting 3, and the hot water sucked out from the bathtub 2 circulates in the bath circuit 50 by the operation of the bath pump 53, so that the water flow switch 54 is turned on. Become.

Then, when the water flow switch 54 is in the ON state (STEP6: yes), it is then determined whether or not the ON state of the water flow switch 54 has continued for a predetermined time (for example, 5 seconds) (STEP7). Even if the hot water is not circulated normally due to the presence of air in a part of the bath circuit 50, the water flow switch 54 may be turned on momentarily, so the condition is to continue for a predetermined time. Therefore, false detection can be suppressed. When the ON state of the water flow switch 54 continues for a predetermined time (STEP7: yes), it is determined that there is sufficient hot water in the bathtub 2 and the hot water can be circulated, and the reheating combustion is started (STEP8). ). That is, the combustion fan 14 is operated, the main valve 21, the proportional valve 22, and the bath solenoid valve 24 are opened, and sparks are blown by a spark plug (not shown) to start combustion in the bath burner 15. .. Then, the hot water circulating in the bath circuit 50 is reheated by the heat exchange with the combustion exhaust from the bath burner 15 in the bath heat exchanger 16, so that the temperature of the hot water in the bathtub 2 rises.

Subsequently, it is determined whether or not the temperature of the hot water in the bathtub 2 detected by the bath temperature sensor 55 has reached the set temperature (STEP9), and if it has not yet reached the set temperature (STEP9: no), the setting is made. Continue reheating combustion until the temperature is reached. After that, when the detection temperature of the bath temperature sensor 55 reaches the set temperature (STEP 9: yes), the reheating combustion is stopped (STEP 10). That is, after extinguishing the bath burner 15, the combustion fan 14 is stopped. Then, when the bath pump 53 is stopped (STEP 11), the reheating control process of FIG. 2 is completed.

On the other hand, if the water flow switch 54 is not in the ON state in the determination of STEP 6 (STEP 6: no), or if the ON state of the water flow switch 54 does not continue for a predetermined time in the determination of STEP 7 (STEP 7: no), STEP 4 or STEP 5 It is determined whether or not the waiting time set in step 1 has elapsed (STEP 12). If the water flow switch 54 does not turn on, or if it does not continue for a predetermined time even if it turns on, the hot water in the bathtub 2 is insufficient (the water level of the bathtub 2 does not reach the circulation fitting 3), or It is presumed that the hot water does not circulate in the bath circuit 50 because air is present in a part of the bath circuit 50 and is not filled with the hot water. Further, as described above, a self-priming pump is used for the bath pump 53, and if there is sufficient hot water in the bathtub 2, the air in the bath circuit 50 can be removed by continuing the operation of the bath pump 53. It is discharged and hot water can be circulated. Therefore, if the standby time has not yet elapsed from the operation of the bath pump 53 (STEP 12: no), the process returns to STEP 6 and it is determined again whether or not the water flow switch 54 is in the ON state. Then, when the water flow switch 54 is turned on (STEP6: yes) and the ON state continues for a predetermined time (STEP7: yes), the above-described steps 8 to 11 are performed, and then the reheating control process of FIG. 2 is performed. To finish.

On the other hand, if the water flow switch 54 is not turned on, or if the standby time elapses from the operation of the bath pump 53 without continuing for a predetermined time even if the water flow switch 54 is turned on (STEP12: yes), the inside of the bathtub 2 It is determined that the hot water is insufficient, the bath pump 53 is stopped in order to stop the reheating (STEP 13), and then the user is notified that the hot water in the bathtub 2 is insufficient. (STEP14). In the bath device 1 of the present embodiment, when the display unit 68 of the remote controller 62 displays an error indicating that there is insufficient hot water in the bathtub 2 and notifies the user, the reheating control process of FIG. 2 ends. The notification of STEP 14 is not limited to the display on the display unit 68, and may be performed by voice. The controller 60 of this embodiment corresponds to the "bathtub state determining means" of the present invention.

Further, the controller 60 of the present embodiment shifts to the hot water filling control process when the reheating is stopped and the reheating control process of FIG. 2 is completed based on the lack of hot water in the bathtub 2. In this hot water filling control process, the following processes are roughly performed. First, the hot water filling solenoid valve 41 is opened, and when the inflow of clean water is detected by the water volume sensor 33, the combustion fan 14 is operated, and the main valve 21, the proportional valve 22, and the hot water supply solenoid valve 23 are opened. Combustion is started by the hot water supply burner 12 by blowing sparks with a spark plug (not shown). As a result, the hot water generated by the hot water supply unit 10 is supplied to the bathtub 2, and when the amount of hot water supplied to the bathtub 2 calculated based on the detected flow rate of the hot water amount sensor 43 reaches the set hot water amount, the hot water filling solenoid valve 41 is closed. .. Then, since the inflow of clean water is not detected by the water amount sensor 33, the combustion fan 14 is stopped after extinguishing the hot water supply burner 12.

As described above, in the bath device 1 of the present embodiment, the state of the hot water in the bath pump 53 is determined at the time of reheating (circulation of the hot water in the bathtub 2), and the hot water in the bath pump 53 is determined. If it is determined that the amount is less than the predetermined amount (not moisturized), the shaft portion of the bath pump 53 is easily worn, so that the waiting time set to the short first hour (30 seconds) is used. Based on the fact that the ON state of the water flow switch 54 does not continue for a predetermined time, it is determined early that the hot water in the bathtub 2 is insufficient, and the operation of the bath pump 53 is restricted to suppress the decrease in durability. On the other hand, when it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount (moist), the shaft portion of the bath pump 53 is not easily worn, so that the second hour (10 minutes) for a long time The operation of the bath pump 53 over the standby time set in) enables the air in the bath circuit 50 to be discharged, and improves the accuracy of determining that there is sufficient hot water in the bathtub 2 (the bath pump 53 is not stopped). be able to. Further, it is possible to eliminate the need for a process of separately supplying hot water to the bath pump 53 (so-called priming water).

In particular, in the bath device 1 of the present embodiment, the state of hot water in the bath pump 53 is determined based on the operation history of the hot water filling button 64, the adding hot water button 66, and the adding water button 67. Of the hot water filling button 64, the adding hot water button 66, and the adding water button 67, the operation button (most recent operation button) that was last operated has not passed a predetermined period (24 hours) from the previous operation. Since the hot water has flowed into the bath pump 53 as the hot water is supplied to the bathtub 2, the amount of hot water in the bath pump 53 is a predetermined amount even if the hot water in the bath pump 53 is not directly detected. It can be easily determined that the above is (moisturized).

The bath device 1 of the present embodiment described above also has the following modifications. Hereinafter, a modified example will be described focusing on points different from the above-described embodiment. In the description of the modified example, the same reference numerals are given to the same configurations as those in the above-described embodiment, and the description thereof will be omitted.

FIG. 4 is a flowchart of the pump state determination process of the first modification. In the pump state determination process of the first modification, first, the previous valve opening history of the hot water filling solenoid valve 41 provided in the hot water filling pipe 40 is read from the storage unit 61 (STEP 30). The storage unit 61 built into the controller 60 of the first modification can store the history of opening the hot water filling solenoid valve 41 that opens and closes the hot water filling pipe 40.

Next, based on the read valve opening history, it is determined whether or not a predetermined period (24 hours) has elapsed from the previous valve opening of the hot water filling solenoid valve 41 (STEP 31). Then, when the predetermined period has not passed since the previous opening of the hot water filling solenoid valve 41 (STEP 31: no), it is determined that the amount of hot water in the bath pump 53 is equal to or more than the predetermined amount (STEP 32). As described above, in any of the hot water filling, the additional hot water, and the additional water, by opening the hot water filling solenoid valve 41, hot water and water are supplied from the hot water filling pipe 40 to the bathtub 2 through the bath circuit 50. .. At this time, a part of hot water or water is supplied to the bathtub 2 via the bath pump 53 via the route passing through the bath going pipe 52. Therefore, if a predetermined period has not passed since the previous opening of the hot water filling solenoid valve 41, the hot water has flowed into the bath pump 53 along with the supply of the hot water to the bathtub 2 within the predetermined period. It can be determined that the inside of the pump 53 is sufficiently moisturized. The hot water filling pipe 40 and the bath circuit 50 of the first modification correspond to the "path" of the present invention. Further, the hot water filling solenoid valve 41 of the first modification corresponds to the "opening / closing valve" of the present invention.

On the other hand, when a predetermined period has passed since the previous opening of the hot water filling solenoid valve 41 (STEP31: yes), the bath of the bath circuit 50 is placed in the bathtub 2 for a long period of at least a predetermined period (24 hours) or more. Since hot water is not supplied via the pump 53 and the inside of the bath pump 53 may be dry, it is determined that the amount of hot water in the bath pump 53 is less than a predetermined amount (STEP 33). When the state of the hot water in the bath pump 53 is determined based on the valve opening history of the hot water filling solenoid valve 41 in this way, the pump state determination process of FIG. 4 is terminated, and the process returns to the reheating control process of FIG.

Here, as described above, in the pump state determination process of the first modification, the amount of hot water in the bath pump 53 is a predetermined amount depending on whether or not a predetermined period has elapsed since the previous opening of the hot water filling solenoid valve 41. It is determined whether it is less than or more than a predetermined amount, but the control for determining is not limited to this. For example, when the valve opening history of the hot water filling solenoid valve 41 in a predetermined period (24 hours) before operating the bath pump 53 is read from the storage unit 61 and the hot water filling solenoid valve 41 is opened within the predetermined period. Determines that the amount of hot water in the bath pump 53 is equal to or greater than the predetermined amount, whereas if the hot water filling solenoid valve 41 is not opened within the predetermined period, the amount of hot water in the bath pump 53 is less than the predetermined amount. You may judge that there is. Further, with the opening of the hot water filling electromagnetic valve 41, the valve opening flag stored in the storage unit 61 is set to ON, and the valve opening flag is set to OFF after a predetermined period (24 hours) has elapsed. When the valve opening flag is ON when operating the bath pump 53, it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount, whereas when the valve opening flag is OFF, the bath pump 53 is determined. It may be determined that the amount of hot water in the water is less than a predetermined amount.

As described above, in the bath device 1 of the first modification, the state of hot water in the bath pump 53 is determined based on the valve opening history of the hot water filling solenoid valve 41. If a predetermined period (24 hours) has not passed since the previous opening of the hot water filling solenoid valve 41, the hot water is supplied to the bathtub 2 by any of the hot water filling, the additional hot water, and the additional water within the predetermined period. Since the hot water has flowed into the bath pump 53, it is easy to make sure that the hot water in the bath pump 53 is equal to or more than a predetermined amount (moist) without directly detecting the hot water in the bath pump 53. You can judge. Then, as in the above-described embodiment, the durability of the bath pump 53 is improved by setting the standby time according to the determination result of whether the amount of hot water in the bath pump 53 is less than the predetermined amount or more than the predetermined amount. It is possible to improve the accuracy of determining that there is sufficient hot water in the bathtub 2 (the bath pump 53 is not stopped) while suppressing the decrease.

FIG. 5 is a flowchart of the pump state determination process of the second modification. In the pump state determination process of the second modification, first, the previous detection history of the hot water amount sensor 43 provided in the hot water filling pipe 40 is read from the storage unit 61 (STEP 40). In the storage unit 61 built in the controller 60 of the second modification, the flow of hot water of a constant flow rate (for example, 2 L / min) or more is flown for a certain period of time (for example, 2 L / min) by the hot water amount sensor 43 that detects the flow rate of the hot water flowing through the hot water filling pipe 40. It is possible to store the detected history continuously for 10 seconds or more.

Next, based on the read detection history, it is determined whether or not a predetermined period (24 hours) has elapsed since the flow of hot water having a certain flow rate or more was continuously detected for a certain period of time or more by the hot water amount sensor 43 last time. (STEP41). Then, when the predetermined period has not passed (STEP 41: no), it is determined that the amount of hot water in the bath pump 53 is equal to or more than the predetermined amount (STEP 42). As described above, in any of the hot water filling, the additional hot water, and the additional water, the hot water and water are supplied to the bathtub 2 through the hot water outlet pipe 35, the hot water filling pipe 40, and the bath circuit 50. At this time, a part of the hot water or water flowing from the hot water filling pipe 40 into the bath return pipe 51 is supplied to the bathtub 2 via the bath pump 53 through the bath going pipe 52. Therefore, if a predetermined period has not passed since the flow of hot water of a certain flow rate or more was continuously detected for a certain period of time or more by the hot water amount sensor 43, the bathtub 2 is supplied with the hot water within the predetermined period. Since hot water has flowed into the pump 53, it can be determined that the inside of the bath pump 53 is sufficiently moisturized. In addition, an error caused by a momentary flow of hot water in the hot water filling pipe 40 that does not affect the hot water in the bath pump 53 is provided on the condition that the flow of hot water exceeds a certain flow rate but continues for a certain period of time or longer. It is possible to suppress the judgment. The hot water filling pipe 40 and the bath circuit 50 of the second modification correspond to the "path" of the present invention, and the hot water amount sensor 43 of the second modification corresponds to the "supply detecting means" of the present invention. ing.

On the other hand, if a predetermined period has elapsed since the hot water amount sensor 43 detected the flow of hot water having a certain flow rate or more for a certain period of time or more (STEP41: yes), at least the predetermined period (24 hours) or more. Since hot water has not been supplied to the bathtub 2 via the bath pump 53 of the bath circuit 50 for a long period of time and the inside of the bath pump 53 may be dry, the amount of hot water in the bath pump 53 is less than a predetermined amount. (STEP43). When the state of the hot water in the bath pump 53 is determined based on the detection history of the hot water amount sensor 43 in this way, the pump state determination process of FIG. 5 is terminated, and the process returns to the reheating control process of FIG.

Here, as described above, in the pump state determination process of the second modification, whether or not a predetermined period has elapsed since the hot water amount sensor 43 previously detected the flow of hot water of a certain flow rate or more for a certain period of time or longer. It is determined whether the amount of hot water in the bath pump 53 is less than a predetermined amount or a predetermined amount or more according to the above, but the control for determining is not limited to this. For example, the detection history of the hot water amount sensor 43 in a predetermined period (24 hours) before the bath pump 53 is operated is read from the storage unit 61, and the flow of hot water of a certain flow rate or more is read by the hot water amount sensor 43 within a predetermined period for a certain period of time or more. When there is a continuous detection, it is determined that the amount of hot water in the bath pump 53 is more than a predetermined amount, whereas the hot water sensor 43 detects that the flow of hot water of a certain flow rate or more continues for a certain period of time or more within a predetermined period. If there is no such water, it may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount. Further, when the hot water amount sensor 43 continuously detects the flow of hot water of a certain flow rate or more for a certain period of time or longer, the supply flag stored in the storage unit 61 is set to ON, and a predetermined period (24 hours) has elapsed since then. Then, by setting the supply flag to OFF, when the bath pump 53 is operated, if the supply flag is ON, it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount, whereas the supply flag is set. If it is OFF, it may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount.

As described above, in the bath device 1 of the second modification, the state of hot water in the bath pump 53 is determined based on the detection history of the hot water amount sensor 43. If a predetermined period (24 hours) has not passed since the flow of hot water of a certain flow rate or more was continuously detected for a certain period of time or more by the hot water amount sensor 43, the hot water filling, the additional hot water, and the additional water are added within the predetermined period. Since the hot water has flowed into the bath pump 53 due to the supply of hot water to the bathtub 2 by either of them, the hot water in the bath pump 53 can be found even if the hot water in the bath pump 53 is not directly detected. It can be easily determined that the amount is more than the fixed amount (moisturized). Then, as in the above-described embodiment, the durability of the bath pump 53 is improved by setting the standby time according to the determination result of whether the amount of hot water in the bath pump 53 is less than the predetermined amount or more than the predetermined amount. It is possible to improve the accuracy of determining that there is sufficient hot water in the bathtub 2 (the bath pump 53 is not stopped) while suppressing the decrease.

In the bath device 1 of the second modification described above, the flow of hot water supplied to the bathtub 2 by any of hot water filling, adding hot water, and adding water is detected by the hot water amount sensor 43 of the hot water filling pipe 40. However, the supply detecting means is not limited to the hot water amount sensor 43, and it is sufficient that the flow of hot water can be detected on the path of supplying hot water to the bathtub 2 via the bath pump 53. For example, of the hot water flowing from the hot water filling pipe 40 into the bath return pipe 51, even if the water flow switch 54 detects the flow of hot water supplied to the bathtub 2 by the route passing through the bath going pipe 52 via the bath pump 53. good. In this case, the ON state of the water flow switch 54 is stored in the storage unit 61 for a certain period of time (for example, 10 seconds) or more without operating the bath pump 53. If a predetermined period (24 hours) has not passed since the continuation for a certain period of time or more, the bath pump 53 is supplied with hot water to the bathtub 2 by any of the hot water filling, the additional hot water, and the additional water within the predetermined period. Since the hot water has flowed in, it may be determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount. The water flow switch 54 in this case corresponds to the "supply detecting means" of the present invention.

FIG. 6 is a flowchart of the pump state determination process of the third modification. In the pump state determination process of the third modification, first, the previous detection history of the water flow switch 54 for detecting the flow of hot water in the bath circuit 50 in the reheating is read from the storage unit 61 (STEP 50). The storage unit 61 built in the controller 60 of the third modification can store a history in which the ON state of the water flow switch 54 continues for a specified time (for example, 5 seconds) or more while the bath pump 53 is in operation.

Next, based on the read detection history, it is determined whether or not a predetermined period (24 hours) has elapsed since the ON state of the water flow switch 54 lasted for a predetermined time or longer (STEP51). Then, when the predetermined period has not passed (STEP51: no), the hot water passes through the bath pump 53 as the reheating (circulation of the hot water in the bath circuit 50) is normally performed within the predetermined period. Since the inside of the bath pump 53 is sufficiently moistened, it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount (STEP 52). It should be noted that the water flow switch 54 is not only turned on, but is caused by the momentary flow of hot water in the bath circuit 50 that does not affect the hot water in the bath pump 53, provided that the water flow switch 54 is continued for a specified time or longer. It is possible to suppress erroneous judgment.

On the other hand, if a predetermined period has elapsed since the ON state of the water flow switch 54 lasted for a specified time or longer (STEP51: yes), reheating is performed for a long period of at least a predetermined period (24 hours) (24 hours). (Circulation of hot water in the bath circuit 50) is not performed normally, and the inside of the bath pump 53 may be dry. Therefore, it is determined that the amount of hot water in the bath pump 53 is less than a predetermined amount (STEP 53). .. When the state of the hot water in the bath pump 53 is determined based on the detection history of the water flow switch 54 in the reheating (operating state of the bath pump 53), the pump state determination process of FIG. 6 is completed and the reheating of FIG. 2 is completed. Return to control processing.

Here, as described above, in the pump state determination process of the third modification, the inside of the bath pump 53 depends on whether or not a predetermined period has elapsed since the ON state of the water flow switch 54 last continued for a predetermined time or longer. It is determined whether the amount of hot water is less than a predetermined amount or more than a predetermined amount, but the control for determining is not limited to this. For example, the detection history of the water flow switch 54 during reheating in a predetermined period (24 hours) before the bath pump 53 is operated is read from the storage unit 61, and the ON state of the water flow switch 54 continues for a specified time or longer within the predetermined period. If this has happened, it is determined that the amount of hot water in the bath pump 53 is greater than or equal to the specified amount, whereas if the water flow switch 54 has not been turned on for more than the specified time within the specified period, It may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount. Further, when the ON state of the water flow switch 54 continues for a specified time or longer during reheating (operating state of the bath pump 53), the circulation flag stored in the storage unit 61 is set to ON, and then a predetermined period (24 hours) is set. When the circulation flag is set to OFF after the lapse, if the circulation flag is ON when the bath pump 53 is operated, it is determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount, whereas the circulation flag is set. If is OFF, it may be determined that the amount of hot water in the bath pump 53 is less than a predetermined amount.

As described above, in the bath device 1 of the third modification, the state of the hot water in the bath pump 53 is determined based on the detection history of the water flow switch 54 in the reheating. If a predetermined period (24 hours) has not passed since the ON state of the water flow switch 54 lasted for a specified time or longer, reheating (circulation of hot water in the bath circuit 50) is normally performed within the predetermined period. As a result, the hot water has passed through the bath pump 53, so that the hot water in the bath pump 53 is more than a predetermined amount (moisturized) even if the hot water in the bath pump 53 is not directly detected. ) Can be easily determined. Then, as in the above-described embodiment, the durability of the bath pump 53 is improved by setting the standby time according to the determination result of whether the amount of hot water in the bath pump 53 is less than the predetermined amount or more than the predetermined amount. It is possible to improve the accuracy of determining that there is sufficient hot water in the bathtub 2 (the bath pump 53 is not stopped) while suppressing the decrease.

Although the bath device 1 of the present embodiment and the modified example has been described above, the present invention is not limited to the above-mentioned embodiment and the modified example, and can be implemented in various embodiments without departing from the gist thereof. Is.

For example, in the bath device 1 of the above-described embodiment and the modified example, the operation history of the hot water filling button 64, the hot water button 66, and the hot water button 67, the valve opening history of the hot water filling solenoid valve 41, and the detection of the hot water amount sensor 43 The state of the hot water in the bath pump 53 was indirectly determined based on the history and the detection history of the water flow switch 54 in the reheating. However, by installing a dedicated sensor for detecting the hot water in the bath pump 53, the state of the hot water in the bath pump 53 may be directly determined based on the detection result of this sensor. However, as in the above-described embodiment and modification, the operation history of the hot water filling button 64, the hot water button 66, and the hot water button 67, the valve opening history of the hot water filling solenoid valve 41, the detection history of the hot water amount sensor 43, and the like. By indirectly determining the state of hot water in the bath pump 53 based on the detection history of the water flow switch 54 during reheating, it is not necessary to add a dedicated sensor to the bath pump 53, and the determination is simple. be able to.

Further, in the bath device 1 of the above-described embodiment and the modified example, the hot water in the bathtub 2 is circulated by the bath circuit 50 to perform reheating (reheating). However. The purpose of circulating the hot water in the bathtub 2 is not limited to reheating, and for example, it is possible to add fine bubbles to the hot water. In this case, the fine bubble generator for generating fine bubbles may be installed in the bath circuit 50, and the fine bubble generator may be operated in conjunction with the operation of the bath pump 53. As a result, the hot water sucked out from the bathtub 2 is supplied to the bathtub 2 again with the addition of fine bubbles when passing through the fine bubble generator. Further, if the ON state of the water flow switch 54 does not continue for a predetermined time even after the bath pump 53 operates and a predetermined standby time elapses, it is determined that the hot water in the bathtub 2 is insufficient, and the bath pump 53 is used. The fine bubble generator may be stopped in conjunction with the stop to stop the addition of fine bubbles. Then, as in the above-described embodiment, the durability of the bath pump 53 is improved by setting the standby time according to the determination result of whether the amount of hot water in the bath pump 53 is less than the predetermined amount or more than the predetermined amount. It is possible to improve the accuracy of determining that there is sufficient hot water in the bathtub 2 (the bath pump 53 is not stopped) while suppressing the decrease.

Further, in the bath device 1 of the above-described embodiment, if the water flow switch 54 does not turn on even after the standby time elapses, the bath pump 53 is stopped to notify the shortage of hot water in the bathtub 2. (See STEP 11 to 13 in FIG. 2). However, before notifying the shortage of hot water in the bathtub 2, the hot water filling solenoid valve 41 is once opened to supply a specified amount (for example, 6 L) of hot water to the bathtub 2 so that the bath pump 53 is primed. You may. In this case, after priming, the operation of the bath pump 53 is restarted by returning to STEP 1 in FIG. 2, and in the pump state determination process of STEP 2, hot water has flowed into the bath pump 53 by the priming. It may be determined that the amount of hot water in the bath pump 53 is equal to or more than a predetermined amount, and the standby time may be set to the second hour (10 minutes). Then, when the water flow switch 54 does not turn on even after the standby time elapses after priming, the shortage of hot water in the bathtub 2 may be notified. In this way, it is possible to more accurately determine whether or not there is sufficient hot water in the bathtub 2 while suppressing a decrease in the durability of the bath pump 53.

Further, in the bath device 1 of the above-described embodiment, the bath circuit 50 circulates hot water between the bathtub 2 and the bath heat exchanger 16. However, in the bath device 1 having a heating function, the bath circuit 50 is provided between the bath 2 and the liquid / liquid heat exchanger by providing a liquid / liquid heat exchanger in the circulation circuit that circulates the heat medium for heating. You may make the hot water circulate in. In this case, the hot water sucked out from the bathtub 2 by the operation of the bath pump 53 is heated by heat exchange with the heat medium in the liquid / liquid heat exchanger, and then supplied to the bathtub 2 again. The present invention can be suitably applied to such a bath device 1.

1 ... bath equipment, 2 ... bathtub, 3 ... circulation metal fittings,
4 ... Drainage port, 5 ... Drainage plug, 10 ... Hot water supply section,
11 ... Bath heating section, 12 ... Hot water supply burner, 13 ... Hot water supply heat exchanger,
14 ... Combustion fan, 15 ... Bath burner, 16 ... Bath heat exchanger,
20 ... gas piping, 21 ... main valve, 22 ... proportional valve,
23 ... Solenoid valve for hot water supply, 24 ... Solenoid valve for bath, 30 ... Water supply piping,
31 ... Water supply tap, 32 ... Drain tap, 33 ... Water volume sensor,
35 ... Hot water pipe, 36 ... Karan, 37 ... Drain plug,
40 ... Hot water filling piping, 41 ... Hot water filling solenoid valve, 42 ... Check valve,
43 ... Hot water amount sensor, 50 ... Bath circuit, 51 ... Bath return piping,
52 ... Bath going pipe, 53 ... Bath pump, 54 ... Water flow switch,
55 ... bath temperature sensor, 60 ... controller, 61 ... storage unit,
62 ... remote control, 63 ... setting button, 64 ... hot water filling button,
65 ... Reheating button, 66 ... Addition hot water button, 67 ... Addition water button,
68 ... Display unit.

Claims (5)

In a bath device that can circulate hot water in the bathtub with a bath circuit
A bath pump provided in the bath circuit to transfer hot water and
A circulation detecting means for detecting the flow of hot water in the bath circuit and
When the flow of hot water is not detected by the circulation detecting means even after the bath pump is operated and a predetermined waiting time elapses, the bathtub state determining means for determining that the hot water in the bathtub is insufficient, and the bathtub state determining means.
A pump state determination means for determining whether or not the amount of hot water in the bath pump is less than a predetermined amount, and
It is provided with a standby time setting means for setting the standby time based on the determination result by the pump state determination means.
The standby time setting means determines that the amount of hot water in the bath pump is equal to or greater than the predetermined amount, as compared with the case where the pump state determining means determines that the amount of hot water in the bath pump is less than the predetermined amount. A bath device characterized by setting a long waiting time in the case of a pump. In the bath device according to claim 1,
The pump state determining means has less than the predetermined amount of hot water in the bath pump when a predetermined period has elapsed since the circulation detecting means previously detected the flow of hot water continuing for a predetermined time or longer. The bath device is characterized in that, when the predetermined period has not passed, it is determined that the amount of hot water in the bath pump is equal to or more than the predetermined amount. In the bath device according to claim 1,
When a predetermined operation unit is operated by the user, hot water is supplied to the bathtub via the bath pump to supply hot water.
The pump state determining means determines that the amount of hot water in the bath pump is less than the predetermined amount when a predetermined period has elapsed since the operation unit was last operated, and the predetermined period has elapsed. A bath device characterized in that it is determined that the amount of hot water in the bath pump is equal to or more than the predetermined amount when there is no such water. In the bath device according to claim 1,
An on-off valve for opening and closing the upstream side of the path for supplying hot water to the bathtub via the bath pump is provided.
When a predetermined period has elapsed from the previous opening of the on-off valve, the pump state determining means determines that the amount of hot water in the bath pump is less than the predetermined amount, and the predetermined period has elapsed. A bath device characterized in that it is determined that the amount of hot water in the bath pump is equal to or more than the predetermined amount when there is no such water. In the bath device according to claim 1,
A supply detecting means for detecting the flow of hot water in a path for supplying hot water to the bathtub via the bath pump is provided.
The pump state determining means has less than the predetermined amount of hot water in the bath pump when a predetermined period has elapsed since the supply detecting means detected the flow of hot water continuing for a certain period of time or more last time. The bath device is characterized in that, when the predetermined period has not passed, it is determined that the amount of hot water in the bath pump is equal to or more than the predetermined amount.

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