JP2001124407A - Bath boiler device with hot water supply function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably detect a case that remaining water is considered to be absent when a remaining water amount in a bath tube is computed through quantity of heat balance computing operation even when it is erroneously decided through circulation decision that remaining water is present despite of remaining water in a bathtub being absent due to the execution of a defective work, and proper filling with hot water is effected by correctly deciding an amount of remaining water in a bathtub. SOLUTION: A circulation heating type bath boiler 20 is situated adjacently to a bathtub 70, a remaining water amount in the bathtub 70 is detected through circulation heating of bathtub water and quantity of heat balance computing operation through which a quantity of heat balance in this case is computed. In a so formed bath boiler device with a hot water supply function, when a remaining water quantity of a bathtub obtained through the quantity of heat balance computing operation is below a reference amount in case of circulation of bathtub water being executed, quantity of heat balance computing operation is executed again by filling with a specified quantity of hot water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub with a hot water supply function, and more particularly, a bathtub of a circulation heating type is installed adjacent to a bathtub, and the amount of remaining water in the bathtub is detected by circulating and heating the bathtub water. The present invention relates to a bath kettle device with a hot water supply function, which is performed by a calorie balance calculation operation of calculating a calorie balance at that time.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show examples of a conventional apparatus. 1
Is a bathtub, 2 is a bathtub, and the bathtub 2 is installed adjacent to the bathtub 1. The bathtub 1 and the bathtub 2 are connected by a connection pipe section 3 including a connection return path 3a, a connection outward path 3b, and a water chamber 3c, and the bathtub water is exchanged for bath heat by the circulation pump 4 on the bathtub 2 side. It is circulated through the vessel 5 for heating. Then, when the bath is automatically operated, first, it is determined whether or not there is residual water in the bathtub 1. This determination is made based on whether or not bathtub water circulates through bath kettle 2 by driving circulation pump 4. In this circulation determination, when the water level in the bathtub 1 is up to the level L above the connection pipe part 3, circulation to the bath kettle 2 is performed, so that it is determined that there is residual water. And when it is determined that there is no residual water by the circulation determination,
After filling with hot water assuming that the bathtub 1 is empty, the heating operation starts. On the other hand, when it is determined that there is residual water, the amount of residual water in the bathtub 1 is detected as the next step. The detection of the remaining amount of water in the bathtub is performed by a calorie balance calculation operation of circulating and heating the bathtub water and calculating a calorie balance at that time. That is, in order to detect the amount of remaining water in the bathtub 1, the bathtub water is circulated and heated to an appropriate temperature, so that the bathtub water amount is calculated from the amount of heat required during that time and the rising temperature. When the amount of remaining water in the bathtub 1 is detected, the difference amount up to the set hot water amount in the bathtub 1 is poured, and the heating operation starts.

[0003]

However, in the above-described bath kettle apparatus with a hot-water supply function in which the bath kettle 2 is installed adjacent to the bathtub 1, the remaining water that can be circulated to the bath kettle 2 is actually in the bathtub 1. Although it is determined that there is no residual water, that is, it should be determined that there is no residual water, it is erroneously determined that there is residual water. A problem such as a malfunction or termination without the filling of the hot water has occurred due to, for example, a poor construction in which the connection return path is connected on the reverse slope. FIG.
An example of the case of the erroneous determination is shown in FIG. When water is accumulated in the connection return path 3a due to poor construction or the like, the connection return path 3a is actually used even though there is no residual water in the bathtub 1.
The remaining water circulates through the bath kettle 2 and returns to the connection return path 3a again through the water chamber 3c, so that it may be erroneously determined that there is residual water in the circulation determination. In this case, the operation enters a calorie balance calculation operation that is not originally planned, and is heated to a high temperature state in a very short time. As a result, even though there is no remaining water, it ends up without filling with water after all. Also, as shown in FIG.
Even if there is only residual water that satisfies only “a”, the circulation is somehow performed by being combined with the water remaining in the connection return path 3a, and it is determined that there is residual water in the circulation determination. Sometimes. As a result, the heat balance calculation operation which is not originally planned is started. In this case,
Since there is not enough water level to fill the connection outward path 3b, the warm water circulated to the bath kettle 2 and heated drops from the connection outward path 3b to the vicinity of the connection return path 3a immediately below, and short-circuits again to the connection return path 3a. And circulates, and only a part of the residual water circulates and is heated to a high temperature in a short time. As a result, the accurate remaining water amount is not calculated by the calorie balance calculation, and the process ends without filling with water even though there is no remaining water.

Therefore, the present invention solves the above-mentioned disadvantages of the conventional apparatus, and when there is no residual water in the bathtub due to poor construction or the like, it is erroneously determined that there is residual water in the circulation determination. Even when calculating the remaining water amount of the bathtub by the calorie balance calculation operation, it is possible to reliably detect the case where there is no remaining water, and to correctly determine the remaining water amount in the bathtub,
An object of the present invention is to provide a bath kettle device with a hot water supply function that can ensure that an appropriate hot water is filled.

[0005]

Means for Solving the Problems To solve the above-mentioned problems, a bath kettle apparatus with a hot-water supply function of the present invention is provided with a circulating heating type bath kettle adjacent to a bathtub, and detecting the residual water amount in the bathtub is as follows.
A bath heater device with a hot water supply function, which is operated by a calorie balance calculation operation of circulating and heating the bathtub water and calculating a calorie balance at that time, even when the bathtub water can be circulated, the calorie balance calculation operation When the remaining amount of bathtub water obtained by the above is less than the reference amount, a certain amount of hot water is supplied and the calorie balance calculation operation is performed again.
The feature is. Further, in the bath kettle device with a hot water supply function of the present invention, a circulating heating type bath kettle is installed adjacent to the bathtub, and the amount of residual water in the bathtub is detected by circulating and heating the bathtub water and calculating the heat balance at that time. A bath kettle device with a hot water supply function which is performed by a calorie balance calculation operation, wherein even when bath water can be circulated, the bath tub water is kept constant for a short time less than a certain reference time in the calorie balance calculation operation. The second feature is that when the temperature rises above the reference temperature, a certain amount of molten metal is poured and the calorie balance calculation operation is performed again. In addition, in addition to the first or second feature, the bath kettle device with a hot water supply function of the present invention is characterized in that when a certain amount of hot water is poured when the calorie balance calculation operation is to be performed again, the pouring of the hot water is calculated. The third feature is that when the amount exceeds the set water amount in the bathtub, only the amount of water that reaches the set water amount is poured, and then the operation shifts to the heating operation.
In addition, the bath kettle apparatus with a hot water supply function of the present invention, in addition to the features described in any one of the first to third aspects, is characterized in that a certain amount of pouring for performing the calorie balance operation again is higher than the set bathtub temperature. The fourth feature is that the process is performed with hot water at a temperature lower than a certain temperature.

[0006] In the first feature, when the bathtub water circulates superficially even though the bathtub residual water does not actually have the amount that can be circulated to the bathtub, the residual water is present. Is mistakenly determined, and the next calorie balance calculation operation starts, and the bathtub remaining water amount is calculated. However, when there is no residual water amount that can actually circulate in the bathtub, the value of the bathtub residual water amount calculated by the calorie balance calculation is not an accurate value, but with a certain correlation, it is a rather small value. Is calculated. Therefore, when a value of the remaining water amount which is considerably smaller than the predetermined reference amount is calculated, the calorie balance calculation operation is performed after further pouring a certain amount of molten metal. If the actual remaining water amount is such that the actual remaining water amount can be circulated to the bath kettle by the above-mentioned fixed amount of pouring, the value of the remaining water amount by the calorie balance calculation also becomes a large value equal to or larger than the reference amount.
When the remaining water amount equal to or more than the reference amount is calculated, the value of the calculated remaining water amount can be estimated to be a correct value. Therefore, a water amount difference up to the set water amount of the bathtub is calculated based on the value to supply hot water. It becomes possible. Therefore, from the above, even if an erroneous determination is made at the time of the circulation determination, an appropriate filling can be finally achieved. In the above description, the reference amount can be set in advance as an amount corresponding to a minimum water level at which hot water in the bathtub can circulate to the bath kettle. In addition, the certain amount in the case of a certain amount of pouring can be a hot water amount such that the amount of remaining water in the bathtub becomes equal to or more than the reference amount by the pouring. According to the first feature, even if it is determined that there is residual water in the circulation determination even though there is no residual water in the bathtub, the amount of residual water in the bathtub is calculated by the calorie balance calculation operation. In this case, it is possible to reliably detect a case where there is no residual water, and by repeating the calorie balance calculation operation, finally, an accurate residual water amount is detected and appropriate filling is performed. be able to.

[0007] According to the second feature, even if the bathtub water circulation is superficially performed even though the bathtub residual water does not actually have an amount that can be circulated to the bath kettle, the residual water remains. It is erroneously determined that there is water, and the operation enters the next calorie balance calculation operation, so that the bathtub remaining water amount is calculated. However, when there is no residual water amount that can be actually circulated in the bathtub, a very small amount of water is actually circulated and heated when the calorie balance calculation operation is performed. The result is that the water temperature rises significantly over time. Therefore, when the temperature rises above the reference rise temperature in a short time that is less than the predetermined reference time, the heat balance calculation operation is performed after pouring a certain amount of molten metal. If the actual amount of residual water becomes a residual water amount that can be circulated to the bath kettle with the certain amount of pouring,
In the calorie balance calculation operation, since a large temperature rise in a short time as described above is not performed, the water amount difference up to the set water amount of the bathtub is calculated based on the calculation residual water amount obtained by the calorie balance calculation operation at that time. It becomes possible to supply hot water. Therefore, from the above, even if an erroneous determination is made at the time of the circulation determination, an appropriate filling can be finally achieved. In the above description, the appropriate time and temperature are determined in advance by experiments for the reference time and the reference temperature increase. Further, with respect to a certain amount of pouring, the amount of hot water can be adjusted so that the amount of remaining water in the bathtub becomes equal to or more than the reference amount by the pouring. According to the second feature, even if it is determined that there is residual water in the circulation determination even though there is no residual water in the bathtub,
By monitoring the temperature rise time and the degree of temperature rise in the calorie balance calculation operation, it is possible to reliably detect the case where there is no remaining water in the bathtub, and by repeating the calorie balance calculation operation, eventually, An accurate remaining water amount can be detected, and appropriate hot water filling can be performed.

According to the third aspect of the present invention, in addition to the operation of the first or second aspect, when a calorie balance calculation operation is to be performed again, a certain amount of molten metal is poured. When the integrated amount of the hot water exceeds the set water amount of the bathtub, only the amount of water that reaches the set water amount is poured, and then the operation shifts to the heating operation, so by repeating the calorie balance calculation operation, It is possible to prevent a situation in which the amount of water in the bathtub exceeds the set amount of water in the bathtub.

According to the fourth aspect of the present invention, in addition to the operation according to any one of the first to third aspects, a certain amount of pouring for performing the calorie balance calculation operation again is set. By performing the operation with hot water at a certain temperature lower than the bathtub temperature, it is possible to raise the temperature of the bathtub water at least to some extent at the time of the calorie balance calculation operation, and to improve the credit in the calorie balance calculation. It is possible to calculate the value of the remaining amount of the bathtub more accurately.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a bath kettle device with a hot water supply function showing one embodiment of the present invention, FIG. 2 is a flowchart showing a control example of automatic bath operation by a controller, and FIG. 3 is a control example of another bath automatic operation by a controller. It is a flowchart which shows.

In FIG. 1, a bath kettle device having a hot water supply function comprises:
A burner unit 10 having a hot water supply burner 11 having a hot water supply burner 11 and a bath kettle 20 having a bath burner 21 are provided. Each of the burners 11, 21 is provided with a fuel gas supply path 30 necessary for the burner. The hot water supply combustion can body 10 is provided with an instantaneous heating type hot water supply heat exchanger 12 and a blower 13, and a water inlet pipe 40 is connected to the hot water supply heat exchanger 12 from the outside,
Further, a tapping pipe 50 is further extended from the hot water supply heat exchanger 12 so as to be used for hot water supply. The bath kettle 20 has an instantaneously heating type bath heat exchanger 22 and a blower 23.
And a circulation path 80 from the bathtub 70 is connected to the bath heat exchanger 22. Reference numeral 90 denotes a controller of the apparatus, and reference numeral 100 denotes a remote controller.

The combustion can body 10 for hot water supply is provided with an igniter 14 and the like in addition to a burner 11 for hot water supply, a heat exchanger 12 for hot water supply, a blower 13, and the like. By the combustion, the water from the water inlet pipe 40 is heat-exchanged and heated in the hot water supply heat exchanger 12, and is discharged to the hot water pipe 50. The hot water supply burner 11 of the hot water supply combustion can 10 has 1
Or a plurality of performance switching solenoid valves 11a, 11b, 11c
The combustion capacity can be switched by combining the open / close states of the valves 11a, 11b, and 11c as needed. The combustion capacity of the hot water supply burner 11 as a whole is considerably larger than the combustion capacity of the bath burner 21 so that it can meet the demands from large capacity to small capacity.

Similarly, a bath burner 21, a bath heat exchanger 22, a blower 23 and an igniter 2
In the circulation heating operation, bath water circulated from the bath 70 through the circulation path 80 by the combustion of the bath burner 21 is heat-exchanged and heated by the bath heat exchanger 22, and the bath tub 70 is heated. It is made to be returned to. The bath burner 21 is provided with an opening / closing solenoid valve 21a, which is opened during the circulation heating operation of the bathtub water.

The fuel gas supply path 30 is provided with a source gas solenoid valve 31 and a gas proportional valve 32 in the middle thereof. The gas proportional valve 32 is connected to the hot water supply burner 11 from the downstream side.
And fuel gas supply path 30 leading to bath burner 21
This is an adjustment valve for adjusting the secondary pressure of.

The water inlet pipe 40 is provided with a water amount sensor 41, a water inlet temperature sensor 42 and the like. In addition, the inlet pipe 4
From 0, the bypass pipe 43 is connected to the tapping pipe 50. The tapping pipe 50 is provided with a tapping temperature sensor 51, an overflow prevention flow control valve 52, and the like. The tapping pipe 50
The bath automatic hot water supply pipe 60 branches off and is connected to the circulation path 80 from the middle of the process. The bath automatic hot water supply pipe 60 is provided with a flow rate sensor 61, a pouring solenoid valve 62, and a check valve 63. When the pouring solenoid valve 62 is opened, the tapping pipe 5
Hot water from 0 passes through the bath automatic hot water supply pipe 60 and the circulation path 80
After passing through a bath return path 81 and a bath outward path 82, which will be described later, it is introduced into the bathtub 70 by both transports. The amount of hot water automatically supplied to the bathtub 70 is detected by the flow sensor 61.

The bathtub 70 is provided with a connection pipe 71 comprising a connection outward path 71b, a connection return path 71a and a water chamber 71c. The connection pipe portion 71 connects to the circulation path 80 on the side of the bath kettle 20 arranged adjacent to the bathtub 70.
The circulation path 80 includes a bath return path 81 and a bath outward path 82, and the circulation pump 83 circulates the bath kettle 20 to the bath heat exchanger 22. When the circulation is started, the combustion by the bath burner 21 is started when the water flow switch 84 detects the minimum operating water amount or more. The temperature of the bathtub water is detected by a bathtub temperature sensor 85.

The controller 90 controls the entire apparatus, receives a command from a remote controller 100, and obtains information from sensors of various parts of the apparatus to obtain the hot water supply burner 11, the bath burner 21, the gas proportional Valve 32, blower 1
The necessary operation is instructed to each unit of the apparatus such as 3, 23 and the circulation pump 83.

Referring to FIG. 2, a control example of the automatic bath operation by the controller 90 will be described. Now remote control 1
When the automatic bath operation switch is turned on at 00, the controller 90 sets the pouring solenoid valve 6 of the automatic bath water supply pipe 60.
2 is opened to drop 10 liters of hot water at a temperature lower than a set bath temperature by a fixed temperature or more, for example, 7 ° C. lower temperature (step S1). Next, the controller 90
Drives the circulation pump 83 for a fixed time (step S
2) A circulation determination is made as to whether or not the water flow switch 84 of the circulation path 80 is turned on (step S3). In step S1, when hot water having a temperature lower by 7 ° C. is dropped, the tapping temperature (detected by tapping temperature sensor 51) from hot water supply heat exchanger 12 to tapping pipe 50 is set at 5 ° C. with respect to the set bathtub temperature. If it cannot be lowered, switch to water injection.

In the circulation determination (step S3),
If no, that is, if there is no bathtub water circulation, the controller 90 determines that there is not enough water remaining in the bathtub 70 to circulate, and once turns off the circulation pump 83 (step S4) to further set the bathtub. 1 of the step S1 than the amount of water
A small amount of hot water of only 0 liter is dropped at a predetermined constant pouring temperature such as 38 ° C. or a pouring temperature set by the user (step S5). In this case, the pouring solenoid valve 62 is closed when the flow rate sensor 61 detects the predetermined flow rate. When the predetermined amount of hot water has been dropped in step S5, the operation shifts to the automatic heating operation (step S6). In operation, the circulation pump 83 is driven, and when the water flow switch 84 is turned on, the bath burner 21 is turned on.
Is performed by heating the bathtub water circulating in the bath heat exchanger 22, and when the bathtub temperature sensor 85 reaches the set bathtub temperature, the automatic heating operation is terminated.
The completion of the automatic heating operation is notified (step S7).
Then, an automatic warming operation is started (step S8). When the bathtub temperature decreases while checking the bathtub temperature at regular time intervals, an operation such as circulating heating is performed, and after a certain warming time has elapsed (step S9), The warming operation ends (step S10).

In the circulation judgment (step S3),
In the case of Yes, that is, when the bathtub water is circulating, the controller 90 temporarily determines that there is a sufficient amount of residual water in the bathtub 70 and turns off the circulation pump 83 once (step S11). In the calorie balance calculation operation for detecting the water amount, first, a circulation heating operation of the bathtub residual water is performed (step S12). In this circulation heating operation, when the water flow switch 84 is turned on by driving the circulation pump 83, the bath burner 21 is burned and the bathtub temperature sensor 8 is turned on.
5 is, for example, the set bathtub temperature minus 0.5.
When the temperature reaches ℃ or more, the circulation heating operation is stopped (step S13), and the calorie balance calculation at that time is performed to calculate the remaining amount of water in the bathtub (step S14). In the calculation of the bathtub remaining water amount by the calorie balance calculation, the bathtub remaining water amount can be calculated from the required heat amount due to the combustion of the bath burner 21 and the rising temperature of the bathtub remaining water.

When the bathtub remaining water amount is calculated, the controller 90 determines whether or not the calculated bathtub calculated remaining water amount is equal to or greater than a predetermined reference amount (step S1).
5). The reference amount is determined in advance by an appropriate value through an experiment. For example, an amount corresponding to the lowest water level at which the hot water in the bathtub 70 can circulate to the bath kettle 20 can be determined as the reference amount.

If yes in step S15,
The controller 90 causes the bathtub 70 to pour an amount obtained by subtracting the remaining water amount from the set bathtub water amount (step S18), and then proceeds to the automatic heating operation in step S6. in this case,
When the remaining water amount is subtracted from the set bath water amount, if the calculated remaining amount of bath water is smaller than the integrated amount of pouring water already poured into the bathtub (step S
16), pouring is performed using the remaining amount of water in the arithmetic bathtub as the above-described integrated amount of pouring (step S17).

On the other hand, if no in step S15,
In the above-mentioned circulation determination, although it is temporarily assumed that the bathtub residual water amount is large enough to circulate through the bath kettle 20, the value of the bathtub residual water amount obtained by the calorie balance calculation is a value that reverses the above estimation. Since the estimation is doubtful, after pouring a fixed amount of water (Step S20), the process returns to Step S12 again to perform the calorie balance calculation operation from the circulation heating operation, and the calculated bathtub residual water amount is equal to or more than the reference amount. , The pouring (step S20) and the calorie balance calculation operation are repeated. In this case, the fixed amount of pouring water is such that the fixed amount is added to the 10 liters in step S1 so that bath water can be circulated to the bath kettle 20 side,
For example, it can be predetermined as 70 liters (step S20). Of course, it is also possible to determine a smaller constant water volume. In addition, this fixed amount of hot water drops 70 liters of hot water having a temperature lower than the set bathtub temperature by a certain temperature or more, for example, 7 ° C. lower than in the case of step S1. Then, in this case, if the tapping temperature from the hot-water supply heat exchanger 12 to the tapping tube 50 cannot be lowered by 5 ° C. or more with respect to the set bathtub temperature, it is switched to water injection. In addition, when performing the above-mentioned fixed amount of pouring, if the sum of the integrated amount already poured into bath 70 and the current amount of pouring exceeds the set bath water amount (No in step S19), the fixed amount The process proceeds to step S21 without pouring, and hot water having a water amount obtained by subtracting the accumulated amount of the past pouring water from the set bath water amount is poured, and the process proceeds to step S6. In this case, the pouring (step S21) is performed in steps S5 and S18.
In the same manner as in the above case, the dropping is performed at a predetermined constant pouring temperature such as 38 ° C. or a pouring temperature set by the user.

Referring to FIG. 3, another control example of the automatic bath operation by the controller 90 will be described. Now remote control 1
When the automatic bath operation switch is turned on at 00, the controller 90 sets the pouring solenoid valve 6 of the automatic bath water supply pipe 60.
2 is opened to drop 10 liters of hot water at a temperature lower than a set bath temperature by a fixed temperature or more, for example, 7 ° C. lower temperature (step S1). Thereafter, steps S2 to S
Up to 10 is the same as the control described in FIG. If the determination of circulation in step S3 is YES, that is, if the water flow switch 84 is turned on, the controller 90 temporarily determines that there is enough water in the bathtub 70 to circulate and turns off the circulation pump 83 once (step S3). After S41), the operation enters a calorie balance operation for detecting the amount of remaining water in the bathtub, and first, a circulation heating operation of the remaining water in the bathtub is performed (step S42). Then, the circulating heating operation is stopped when the bathtub temperature detected by the bathtub temperature sensor 85 becomes, for example, not less than the set bathtub temperature -0.5 ° C (step S4).
3) At that time, the calorie balance calculation is performed to calculate the bathtub residual water amount (step S44). Steps S42 to S44 have the same contents as steps S12 to S14 in FIG. 2 described above.

After calculating the residual water amount, the controller 90 performs the circulation heating operation in step S42 in step S4.
It is determined whether the temperature rise required to heat the bathtub water to a temperature that meets the condition of 3 is equal to or higher than the reference temperature, for example, 5 ° C. (step S45).
Proceed to 6 to start the automatic heating operation. On the other hand, step S
In the case of Yes at 45, it is further determined whether or not the circulation heating time required for raising the temperature to meet the condition of step S43 in the circulation heating operation is equal to or longer than a reference time, for example, 3 minutes or more (step S46). ). In the case of YES in step S46, the process proceeds to steps S47 to S49, in which the difference between the set bath water amount and the remaining water amount is poured, and then proceeds to step S6. Steps S47 to S49 are the same as those in FIG.
Has the same contents as steps S16 to S18.

In performing automatic operation, if it is determined in the circulation determination that there is residual water in the bathtub 70 that can be circulated to the bath kettle 20, the residual water is usually residual water from the previous use of the bathtub. It is considered that the temperature of the remaining hot water is considerably lower than the set bathtub temperature, and the remaining water amount is also considerably lower than the set bathtub water amount. Therefore, in order to heat such bathtub residual water to the set bathtub temperature -0.5 ° C, a temperature rise above a certain reference rise temperature and a heating time above the reference time are required. Therefore, the temperature and time required for circulating and heating the normal bathtub residual water to near the set bath temperature by experiments beforehand, and the case where hot water close to the set bath temperature has already been poured or the remaining water in the bathtub The reference temperature and the required heating time for distinguishing the ordinary bathtub residual water from the other cases are determined by comparing the temperature rise and the time required by the circulating heating in the case where there is no circulating heating. In this case, it is possible to distinguish between normal remaining water and other cases. In the present embodiment, the reference temperature rise is 5 ° C., and the reference heating time is 3 minutes. When circulating heating to a temperature close to the set bathtub temperature and the temperature rise at that time is less than 5 ° C. (No in step S43), if the hot water has already been poured with hot water at the set bathtub temperature, or Is considered to have been burned up for some reason, and it is not a normal residual water condition.
In this case, the process proceeds to step S6.

Even if the answer is yes in step S45,
In the following step S46, if no, that is, step S4
In Step S43, the circulation heating operation is performed, and the temperature rise when heating to the set bath temperature-0.5 ° C. in Step S43 is equal to or higher than the reference temperature (5 ° C.) and the time required for heating is equal to the reference time (3
If it is less than (minutes), it can be estimated that a small amount of water is circulated and heated and the temperature rises greatly, so that the above-mentioned circulation determination is in doubt. Therefore, in this case, the controller 90 performs pouring of a fixed amount (70 liters) (step S51), and then returns to step S42 again.
The calorie balance calculation operation from the circulation heating operation is performed, and the molten metal is poured until the calculated bath residual water amount becomes equal to or more than the reference (Step S).
51) and the calorie balance calculation operation are repeated. In addition, when performing the above-mentioned fixed amount (70 liters) of pouring, if the sum of the integrated amount already poured into the bathtub and the current pouring amount exceeds the set bathtub water amount (No in step S50), Proceeding to step S52 without pouring the fixed amount,
Hot water having a water amount obtained by subtracting the accumulated amount of hot water from the set bath water amount is poured, and the process proceeds to step S6. Steps S50 to S52 correspond to step S1 in FIG.
The contents are the same as those described in 9 to S21.

[0028]

According to the present invention having the above-described structure and operation, according to the first aspect of the present invention, a circulating heating type bath is provided adjacent to the bath tub, and the remaining bath tub is provided. The detection of the water amount is a bath kettle device with a hot-water supply function which is performed by a calorie balance calculation operation of circulating and heating the bathtub water and calculating a calorie balance at that time, even when the bathtub water can be circulated, When the remaining amount of water in the bathtub obtained by the calorie balance operation is less than the reference amount, a certain amount of hot water is supplied and the calorie balance operation is performed again, so that there is no remaining water in the bathtub. Regardless, even if it is determined that there is residual water in the circulation determination, when calculating the residual water amount of the bathtub by the calorie balance operation, it is necessary to reliably detect the case where there is no residual water. Which allows for heat By repeating the balance computation operation,
Eventually, an accurate remaining water amount can be detected and appropriate hot water filling can be performed. According to the bath kettle apparatus with a hot water supply function according to claim 2, a circulating heating type bath kettle is installed adjacent to the bathtub, and the amount of residual water in the bathtub is detected by circulating and heating the bathtub water. A bath water heater device with a hot water supply function that is performed by a calorie balance calculation operation of calculating a calorie balance, and even when bath water can be circulated, the bath tub water is less than a predetermined reference time in the calorie balance calculation operation. If the temperature rises above a certain reference temperature rise in a short time, a certain amount of hot water is poured and the calorie balance calculation operation is performed again, so even though there is no residual water in the bathtub,
Even if it is determined that there is residual water in the circulation determination, by monitoring the temperature rise time and the degree of the rise in the calorie balance calculation operation, it is possible to reliably detect a case where there is no residual water in the bathtub. Thus, by repeating the calorie balance calculation operation, an accurate remaining water amount can be finally detected, and appropriate filling can be performed. According to the third aspect of the present invention, in addition to the effect of the first or second aspect, when the calorie balance operation is to be performed again, a certain amount of hot water is poured. If the accumulated amount of pouring exceeds the set water amount in the bathtub, only the amount of water that reaches the set water amount is poured, and then the operation shifts to the heating operation. Thus, it is possible to reliably prevent a situation where the bathtub water amount exceeds the set water amount of the bathtub. According to the bath kettle device with hot water supply function described in claim 4, claim 1 to claim 1
In addition to the effects of the configuration according to any one of the above, the pouring of a certain amount to perform the calorie balance calculation operation again is performed with hot water at a temperature lower than the set bath temperature by a certain temperature or more. In addition, the temperature of the bathtub water can be raised at least to a certain degree or more at the time of the calorie balance calculation operation, whereby the reliability of the calorie balance calculation can be increased, and a more accurate value of the bathtub residual water amount can be calculated.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a bath kettle device with a hot water supply function showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a control example of automatic bath operation by a controller.

FIG. 3 is a flowchart illustrating another example of control of automatic bath operation by a controller.

FIG. 4 is an example for explaining a problem at the time of circulation determination of the conventional device.

FIG. 5 is another example for explaining a problem at the time of circulation determination of the conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Combustion can body part for hot water supply 11 Burner for hot water supply 12 Heat exchanger for hot water supply 20 Bath kettle 21 Bath burner 22 Heat exchanger for bath 30 Fuel gas supply path 40 Water inlet pipe 50 Hot water pipe 60 Automatic bath water pipe 61 Flow rate sensor 62 Pouring solenoid valve 70 Bath tub 71 Connection pipe section 71a Connection return path 71b Connection outward path 80 Circulation path 81 Bath return path 82 Bath outward path 83 Circulation pump 84 Water flow switch 85 Bath tub temperature sensor 90 Controller 100 Remote control

Claims (4)

[Claims] 1. A circulating-heating bath kettle is installed adjacent to a bathtub, and the amount of residual water in the bathtub is detected by a calorie balance calculation operation of circulating heating the bathtub water and calculating a calorie balance at that time. In the bath kettle apparatus with the hot water supply function as described above, even when the bath water can be circulated, if the remaining amount of the bath tub obtained by the calorie balance operation is less than the reference amount, a fixed amount of hot water is poured. And performing the calorie balance calculation operation again. 2. A circulating heating type bathtub is installed adjacent to the bathtub, and the amount of residual water in the bathtub is detected by a calorie balance calculation operation of circulating heating the bathtub water and calculating a calorie balance at that time. In the bath water heater device with the hot water supply function described above, even when the bath water can be circulated, the bath water rises by a predetermined reference temperature or more in a short time shorter than the predetermined reference time in the calorie balance calculation operation. in case of,
A bath kettle device with a hot water supply function, characterized in that a fixed amount of hot water is supplied and the calorie balance operation is performed again. 3. When the calorie balance calculation operation is performed again and a certain amount of pouring is performed, if the integrated amount of pouring exceeds the set water amount of the bathtub, only the amount of water that reaches the set water amount is used. The bath kettle device with a hot water supply function according to claim 1 or 2, wherein the operation shifts to a heating operation after pouring the hot water. 4. The method according to claim 1, wherein a certain amount of pouring for performing the calorie balance operation again is performed with hot water having a temperature lower than a set bath temperature by a certain temperature or more. Bath kettle device with hot water supply function as described.