JPH09324954A - Method and device for controlling filling of bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with secular change of a pressure sensor and promote speediness in filling of a bathtub by a method wherein every time the execution mode of filling of bathtub repeated a number of times is effected as precribed, pressure sensor-correcting mode is effected, the bathtub is filled to a level above a fiducial level, and by the pressure sensor output the fiducial output in a storage is rewritten. SOLUTION: By turning on an automatic bathtub-filling switch on a control panel, the repeated number of times of the execution mode is compared with a prescribed number of times. When the number of times of the execution mode effected is greater than the prescribed number of times, a correcting mode is commanded. Then in accordance with a correcting-mode program in a storage 34 a controller 34 commences the control, that is, a driving circuit 35 starts a circulating pump 15 working and hot water is supplied by a prescribed quantity at a time and in succession until a water flow sensor 17 detects the hot water. Upon detection, additional heating of the bathwater is started and the bathtub is filled until the hot water in the bathtub exceeds a fiducial water level. A pressure value read by a pressure sensor 23 is sent to the storage 34 and rewriting is done. Additionally further, hot water is supplied by a prescribed quantity and a pressure value read by the pressure sensor 23 is written; from both the pressure values the area of the opening of the bathtub and the quantity of hot water supplied is calculated and the control is ended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention circulates water in a bathtub in a circulating pipe line, detects the water level in the bathtub by the output value of a pressure sensor provided in the circulating pipe line, and controls the hot water beam. The present invention relates to a method of controlling hot water in a bathtub.

[0002]

2. Description of the Related Art As a conventional method for controlling hot water in a bathtub,
For example, a predetermined amount of water is poured into the bathtub, and hot water is poured to a level above the circulatory reference water level that corresponds to the entrance of the circulation conduit of the bathtub, and the water level is adjusted by the pressure sensor provided in the circulation conduit. There is a device which detects the water level and pours the hot water to the set water level of the bathtub based on the detected water level. On the other hand, in consideration of the secular change of the pressure sensor, in the execution mode of the hot water beam, the output value of the pressure sensor when the hot water beam is heated up to the reference water level of the bathtub or more is set to the output value of the pressure sensor in the previous execution mode. It is conceivable that the output value of the pressure sensor is corrected by rewriting.

[0003]

However, in such a conventional hot water beam control method for a bathtub, since the pressure sensor correction mode is performed in the hot water beam execution mode, the hot water finally reaches the set water level in the bathtub. There is a problem that a lot of time is spent before the beam is applied, and the speed of the hot beam is impaired. The present invention has been made in view of such a conventional problem, and distinguishes the hot water beam execution mode from the pressure sensor correction mode, and for example, every time the hot water beam execution mode is performed a predetermined number of times. , Perform the correction mode,
As a result, it is an object of the present invention to provide a hot water beam control method for a bathtub, which can improve the speed of hot water beam and can cope with aged deterioration of a pressure sensor or the like.

[0004]

The gist of the present invention for achieving the above object lies in the matters described in the following items. 1 The water in the bathtub (18) is circulated in the circulation pipe (12), and the water level in the bathtub is detected by the output value of the pressure sensor (23) provided in the circulation pipe (12), In a bathtub hot water control method for beam control, a correction mode of the pressure sensor (23) is performed every time the hot water beam execution mode is performed a predetermined number of times, a predetermined amount of water is poured into the bathtub, and a circulation pipe line of the bathtub is provided. An output value of the pressure sensor (23) when the hot water beam is discharged to a level equal to or higher than the circulatory reference water level corresponding to the inlet of (12) and the reference output value recorded in the storage unit (34) is used. A method for controlling hot water in a bathtub, which is characterized by being rewritten as follows.

2 The water in the bathtub (18) is supplied to the circulation pipe (1
In the hot water beam control method of the hot water bath, the water level of the bathtub (18) is detected by the output value of the pressure sensor (23) provided in the circulation pipe line (12), and the hot water is controlled. , The correction mode of the pressure sensor (23) is performed every time when the running time of the hot water beam execution mode reaches a predetermined time, and a predetermined amount of water is poured into the bathtub (18) to make the bathtub (1
8) The pressure sensor when the hot water is applied to the reference water level above the circulatory reference water level corresponding to the inlet of the circulation pipe (12) and the reference output value recorded in the storage unit (34) is applied to the hot water. A method for controlling hot water in a bathtub, wherein the output value of (23) is rewritten.

3 A water amount sensor (3) for detecting the amount of hot water after the hot water has been heated to above the reference water level in the bathtub (18).
Based on the output value of 7), a fixed amount of water is further poured, and the reference output value of the pressure sensor (23) when pouring hot water above the reference water level of the bathtub (18) and the further fixed amount of water are poured. The constant amount of water poured is calculated from the pressure value of the pressure sensor (23) at that time, and the output value of the water amount sensor (37) is
3. The hot water beam control method for a bathtub according to claim 1 or 2, wherein the calculated constant water amount is corrected.

4 comparing the actual water amount when the hot water beam is heated to the reference water level or higher with the reference water amount that is planned when the hot water beam is heated to the reference water level or higher, and the actual water amount and the reference water amount are compared. Bathtub (18) if the difference is above the acceptable range
4. The method for controlling hot water in a bathtub according to 1, 2, or 3, wherein the correction mode is not performed if there is residual water.

5 Water in the bathtub (18) is circulated through the circulation line (1
In a hot water beam controller for hot water, which is circulated in 2), the water level of the bathtub (18) is detected by the output value of a pressure sensor (23) provided in the circulation pipe (12), and the hot water is controlled. A storage unit (34) in which the reference output value of the pressure sensor (23) is recorded, and hot water after the reference output value is recorded every time the reference output value is recorded in the storage unit (34). Adder (33) for adding the number of beam execution modes
And a judging section (30) for judging whether or not the number of execution modes has reached a predetermined number, and when the judging section (30) judges that the predetermined number has been reached, a correction mode is performed and a bath ( 18) by pouring a predetermined amount of water into the output value of the pressure sensor (23) when the hot water is poured to a level equal to or higher than the circulatory reference water level corresponding to the inlet of the circulation conduit (12) of the bathtub (18),
The storage unit (34) for rewriting the reference output value.
And a controller (31) for outputting a rewrite control signal to the bathtub hot water beam controller.

6 The water in the bathtub (18) is supplied to the circulation pipe (1
In a hot water beam controller for hot water, which is circulated in 2), the water level of the bathtub (18) is detected by the output value of a pressure sensor (23) provided in the circulation pipe (12), and the hot water is controlled. A storage unit (34) in which the reference output value of the pressure sensor (23) is recorded, and hot water after the reference output value is recorded every time the reference output value is recorded in the storage unit (34). An addition unit (3 that adds the operating time of the beam execution mode)
3), a discriminating unit (30) for discriminating whether or not the operating time of the execution mode has reached a predetermined time, and the discriminating unit (30).
If it is determined that the bath time has reached the predetermined time, the correction mode is performed, and a predetermined amount of water is poured into the bathtub (18), and the bathtub (1
In order to rewrite the reference output value to the output value of the pressure sensor (23) when the hot water is melted up to the circulatory reference water level or higher corresponding to the inlet of the circulation conduit (12) of 8), the storage unit (34). ) Is provided with a control section (31) for outputting a rewrite control signal.

Next, the operation of the invention described in each of the above items will be described. In the bathtub hot water control method according to item 1, the correction mode of the pressure sensor (23) is performed every time the hot water beam execution mode is performed a predetermined number of times, and the bathtub (18)
A predetermined amount of water is poured into the circulation pipe (1) of the bathtub (18).
2) Hot water is applied to a level equal to or higher than the circulatory reference water level corresponding to the inlet, and the reference output value recorded in the storage unit (34) is used as the output value of the pressure sensor (23) when the hot water is applied. Since the rewriting is performed, it is not necessary to perform the correction mode each time the execution mode is performed, and the hot water can be quickly removed from the bathtub (18) and the pressure sensor (2
It is possible to deal with the secular change of 3).

In the hot water beam control method for the bathtub according to the item (2), each time the running time of the hot water beam execution mode reaches a predetermined time,
The correction mode of the pressure sensor (23) is performed, and a predetermined amount of water is poured into the bathtub (18) to reach a circulatory reference water level corresponding to the inlet of the circulation conduit (12) of the bathtub (18) or higher. Since the reference output value recorded in the storage unit (34) is rewritten to the output value of the pressure sensor (23) when the hot water beam is removed, the correction mode is changed in each execution mode. Since it is not necessary to perform the operation, the hot water can be quickly refilled in the bathtub (18), and the secular change of the pressure sensor (23) can be dealt with.

In the method for controlling hot water in the bathtub according to the item 3, after the hot water has been heated to a level higher than the reference water level in the bathtub (18), the output value of the water amount sensor (37) provided in the circulation pipe (12) is set. Based on this, while pouring a certain amount of water, the bathtub (1
The constant water amount poured from the reference output value of the pressure sensor (23) at the time of hot water boiling above the reference water level of 8) and the pressure value of the pressure sensor (23) at the time of further pouring the constant water amount. Since the calculation is performed and the output value of the water amount sensor (37) is corrected to the calculated constant water amount, the relationship between the water level and the output value is appropriate even when the above-described aging change occurs, and The output value of the water amount sensor (37) can be corrected with reference to the output value of the pressure sensor (23) which can be sufficiently dealt with, and thus, the secular change of the water amount sensor (37) can be dealt with. it can.

In the method for controlling hot water in a bathtub according to the item 4, the actual water amount when hot water is boiled above the standard water level is compared with the standard water amount which is planned when hot water is boiled up to the standard water level or higher. When the difference between the actual water amount and the reference water amount is equal to or more than the allowable range, the correction mode is not performed because there is residual water in the bathtub (18). Therefore, it is possible to prevent the pressure sensor (23) and the water amount sensor (37) from being corrected.

In the bathtub hot water control device according to the fifth aspect, the storage unit (34) is filled with a predetermined amount of water into the bathtub (18), and is introduced into the inlet of the circulation conduit (12) of the bathtub (18). The reference output value of the pressure sensor (23) at the time of hot water boiling above the corresponding circulatory reference water level is recorded. Adder (3
In 3), every time the reference output value is recorded in the storage section (34), the number of hot water beam execution modes after the reference output value is recorded is added.

The determination unit (30) determines whether the number of execution modes has reached a predetermined number, and when the determination unit (30) determines that the number has reached the predetermined number, the control unit (31) The correction mode is performed, a rewrite control signal is output to the storage unit (34), and the reference output value is controlled to be rewritten to the output value of the pressure sensor (23) when the hot water is melted above the reference water level. As a result, it is not necessary to perform the correction mode each time the execution mode is set, the hot water can be quickly removed from the bathtub (18), and the pressure sensor (23) can be used.
It is possible to deal with changes over time.

In the bathtub hot water control device according to the sixth aspect, a predetermined amount of water is poured into the bathtub (18) in the storage part (34) and the water is introduced into the inlet of the circulation conduit (12) of the bathtub (18). The reference output value of the pressure sensor (23) at the time of hot water boiling above the corresponding circulatory reference water level is recorded. Adder (3
In 3), every time the reference output value is recorded in the storage unit (34), the running time of the hot water beam execution mode after the reference output value is recorded is added.

The discriminating unit (30) determines whether or not the running time of the hot water beam execution mode has reached a predetermined time, and when the discriminating unit (30) determines that the predetermined time has been reached, the control unit ( 31) performs a correction mode, outputs a rewrite control signal to the storage unit (34), and rewrites the reference output value to the output value of the pressure sensor (23) when hot water is heated to above the reference water level. To control. Thereby, it is not necessary to perform the correction mode each time the execution mode is set, and the bathtub (1
It is possible to quickly perform the hot water welding of 8), and it is possible to cope with the secular change of the pressure sensor (23).

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. As shown in FIG. 2, the present invention is applied to a bath kettle 10, which is a bathtub 18 and a circulation conduit 1 for reheating that is a circulation conduit for circulating water in the bathtub 18.
2 and a heater, and the circulation line 12 includes a return pipe 1
2a is connected to the outflow pipe 12b via a circulation pump 15, and the heater comprises a burner 13 for additional heating and a heat exchanger 14 for additional heating.

A gas supply pipe is connected to the reburning burner 13 via a gas valve 13a, and a return pipe 12a is provided with a thermistor 16 and a water flow sensor 17 for detecting water flow and outputting a detection signal. Has been. A water heater capable of pouring hot water and a beam can be attached to the heater. The water supply pipe 21 is connected to the inlet side of the heat exchanger 25 for the water heater.
1 is connected to a water supply source such as tap water, and the water supply pipe 21 is
A flow sensor 20 is provided. A hot water supply pipe 22 is connected to the outlet side of the heat exchanger 25 for the hot water supply device, and the hot water supply pipe 22 is extended to a desired hot water supply place such as a kitchen.

A hot water pipe 26 is branched from the hot water supply pipe 22, a hot water pouring electromagnetic valve 24 as a hot water pouring control valve, and a flow sensor 29 for detecting the flow rate of the hot water beam.
A pressure sensor 23 as a water level detection sensor for detecting the bath water level is provided. The tip of the hot water pipe 26
The circulation line 12 is connected to the inlet side of the heat exchanger 14. This enables the additional heating operation and the pouring hot water beam operation. Further, a burner hot water beam pipe 25 a for hot water supply is arranged below the heat exchanger 25 for hot water supply, a water inlet temperature sensor 27 is provided for the water supply pipe 21, and a hot water supply pipe 22.
A hot water temperature sensor 28 is provided in the.

As shown in FIG. 1, the adder unit 33 determines the number of hot water beam execution modes from when the automatic switch is turned on to when the hot water is poured above the set water level in the bathtub 18 and the reheating is completed. The determination unit 30 that counts and serves as a comparator
Determines whether or not the number n of execution modes is N (for example, 100 times) or more, and outputs the correction mode signal “H” if it is the above and outputs the execution mode signal “L” if it is the following. Is. The execution mode program, the correction mode program, and the test operation mode program are stored in the storage unit 3.
4 is written.

In the correction mode, the output signal of the pressure sensor 23 is AD-converted and written in the storage unit 34 via the I / O port. To write to the storage unit 34, first pour a predetermined amount of water (a; 50 liters) into the bathtub 18,
If the running water sensor 17 does not turn on, then a predetermined amount of water (b; 20 liters) is poured in each time, and hot water is poured to a level equal to or higher than the circulatory reference water level corresponding to the inlet of the circulation conduit 12 of the bathtub 18, This is performed when the water flow sensor 17 is turned on. In addition, thereafter, when the constant amount of water (c; 40 liters) is poured into the bathtub 18 for the calculation of the opening area of the bathtub 18, the process is performed. Further, it is performed to determine whether or not the bath water has been poured into the bathtub 18 at a set water level or higher. A to c
The pouring of liters is performed on the basis of the detection result of the flow rate sensor 29, and when the pouring of a to c liters is completed, a closing signal for closing the pouring electromagnetic valve 24 from the storage unit 34 to the drive circuit 35. Is output.

When the arithmetic unit having the discriminating unit 30 and the adding unit 33 calculates the opening area, the number of execution modes n
= 0, and the reference output value of the pressure sensor 23 at the reference water level written in the storage unit 34 is rewritten.
The control unit 31 sends a reset signal for the number of execution modes to the addition unit 33 and a rewrite control signal to the storage unit 34. The reset signal may be transmitted to the adder 33 when the operating time of the execution mode has expired. The operating time of the execution mode is calculated by the adding unit 33 based on the clock signal sent to the arithmetic unit.

In the correction mode, when c liters are poured to calculate the opening area, the pouring amount c liters is calculated based on the output value of the flow rate sensor 29, and c liters are poured. The output value of the pressure sensor 23 is obtained. The actual pouring amount c liter is calculated based on the output value of the pressure sensor 23, and the calculated numerical value c1
Then, the output value of the flow sensor 29 is corrected. Thereafter, the pouring amount is calculated based on the corrected output value of the flow rate sensor 29.

Further, in the correction mode, a predetermined amount of water (b; 20 liters) is poured, and hot water is poured to a level equal to or higher than the circulatory reference water level corresponding to the inlet of the circulation conduit 12 of the bathtub 18, When the running water sensor 17 is turned on, the actual water amount required for the hot water beam above the reference water level is calculated, and the calculation unit calculates the actual water amount and the reference water amount scheduled for hot water beam above the reference water level. Compare. When the difference between the water amounts of the two is within the allowable range, the calculation unit sends an unsuitable state signal to the storage unit 34 as an unsuitable state for performing the correction mode, and the control unit The reference numeral 31 outputs an additional heating transition signal to the storage unit 34 in order to transition from the correction mode to additional heating.

Next, the operation will be described. The operation of this embodiment will be described based on the flowcharts shown in FIGS. 3 and 4.

When the automatic hot water switch on the control panel (not shown) is turned on, at step 101 in FIG.
The number n of execution modes and the predetermined number N are read by the discriminating unit 30, and the discriminating unit 30 executes the execution mode signal “L” if n <N, and the correction mode signal “H” if n ≧ N. Is output.

When the correction mode signal "H" is output, the correction mode program stored in the storage unit 34 is activated in step 102, and the instructions of each step read from the storage unit 34 are sent to the arithmetic unit. While being read, it is transferred to the control unit 31 and decrypted, and the control unit 31
A control signal for controlling the arithmetic unit is generated.

In step 103, the drive circuit 35 outputs a drive current for starting the circulation pump 15.
If the running water switch 17 does not detect the circulation of hot water in step 104, a liter of hot water is poured in step 105, the pump circulation is performed again in step 106, and the running water sensor 17 determines the circulation of hot water in step 107. The presence or absence of is detected. When the flowing water sensor 17 detects the circulation of hot water in step 104, the burner 13 for additional heating is ignited in step 137 to perform additional heating.

In step 107, the water flow sensor 17
When the hot water circulation is detected, in step 108,
b liters of molten metal have been poured, and in step 109,
Pump circulation is performed. After pump circulation, step 1
In 10, the presence / absence of circulation of hot water of the running water sensor 17 is detected. Steps 108 to 110 are repeated until hot water is poured to a level equal to or higher than the reference water level corresponding to the entrance of the circulation conduit 12 of the bathtub and hot water is circulated.

In step 110, if there is circulation of hot water, in step 111, the actual water amount QA 'when hot water is heated to above the standard water level and the standard that is scheduled when hot water is heated to above the standard water level. Difference from water amount QA (QA-
QA ') is within the allowable range ΔQA (QA-QA' ≤ ΔQ
If A), in step 112, the pressure sensor 2
The pressure detection by 3 is performed. If QA-QA '> ΔQA in step 111, it is determined that there is residual water in the bathtub 18, the correction mode program is stopped, and the process proceeds to step 137 to perform additional heating.

In step 112, when the pressure is detected, the output value Pa is written in the storage unit 34. In step 113, c liter is poured into the bathtub 18, and in step 114, the pressure sensor 23 detects the pressure again, and the output value Pb which is the pressure detection result is written in the storage unit 34. Step 1
In 15, the opening area S of the bath 18 is calculated from both the output values Pa and Pb and the pouring amount c liter.
Further, the pouring amount c1 is calculated from the opening area S thus calculated and the output values Pa and Pb. When the calculation of the pouring amount c1 of the opening area S and
In 16, the reset signal is output to the addition unit 33 in the calculation unit, and the number of executions n = 0.

In step 117, the reference water amount QA is corrected to the actual water amount QA 'in the storage unit 34, and the opening area S,
The output value of the flow rate sensor 29 is corrected to the pouring amount c1 and the correction data is written in the storage unit 34. Thereby, not only the pressure sensor 23 but also the aging change of the flow rate sensor 29 can be dealt with. Next, in step 118, pressure detection by the pressure sensor 23 is performed, and step 11
At 9, it is determined whether or not hot water above the set water level has been performed in the bathtub 18, and if hot water above the set water level has not been performed, pouring is performed at step 122. Steps 118 to 119 to 122 are repeated until hot water above the set water level is performed.

In step 119, when hot water above the set water level is performed, additional heating is performed in step 120, and in step 121, 1 is added to the number n of execution modes, and the program is boiled to a predetermined temperature. finish. On the other hand, if the number of execution modes n <N in step 101, in step 130,
The program of the execution mode in the storage unit 34 is started, the pump circulation is performed in step 131, the presence or absence of circulation by the water flow sensor 17 is detected in step 132, and if there is circulation, additional heating is performed in step 137. If there is no circulation, then in step 133, pouring of d liter is performed. After the pouring of d liter, in step 134, the pump circulation is performed again,
Furthermore, in step 135, the presence or absence of circulation is detected by the water flow sensor 17. If there is circulation, step 13
At 7, reheating is performed.

If there is no circulation, in step 136 pouring is performed, and in step 137, after the pump circulation is performed, the presence or absence of circulation is again detected by the water flow sensor 17. Step 136 to Step 138
Is repeated until there is a cycle. If there is circulation, after the pressure is detected by the pressure sensor 23 in Step 118, as described above, Steps 119 to 122 are performed.
Works.

Next, a trial operation mode when the apparatus is installed will be described. In FIG. 4, in the test operation mode, when the automatic switch is turned on, a liter of a liter is poured into the bathtub 18 in step 141, and pump circulation is performed in step 142. In step 143, the presence or absence of circulating hot water by the running water sensor 17 is detected, and if the running water sensor 17 is turned off and there is circulating hot water, in step 145, there is residual water in the bathtub 18 and it is suitable for the trial operation mode. Instead, it is a memory error and tries again after draining.

If there is no circulation of hot and cold water in step 143, b liters of molten metal are poured in in step 144, and after pump circulation in step 146,
In step 147, the presence or absence of circulation of hot water is again detected by the water flow sensor 17, and if there is no circulation of hot water,
Returning to step 144, steps 144 to 14
7 is repeated.

If there is circulation of hot and cold water in step 147, the pressure is detected by the pressure sensor 23 in step 148, and the output value Pa thereof is written in the storage section 34 as the reference output value. Then, step 149
At, the bath tub 18 is filled with c liter, and at step 150, the pressure is detected by the pressure sensor 23. The output value Pb is written in the storage unit 34.

In step 151, both output values Pa,
The opening area S of the bath 18 from Pb and the pouring amount c liter
Is calculated and the opening area S is recorded in the storage unit 34. In step 152, the pressure sensor 23 determines whether or not the bath 18 has been poured over the set water level, and if it is less than the set water level, in step 153, the hot water is poured, and in step 155, the pressure sensor 2
After the pressure is detected by 3, the process returns to step 152, and it is determined whether or not the hot water has been sprayed above the set water level.

In step 152, when the water is drained above the set water level, the pump is circulated in step 154 to determine whether or not the water has boiled above the set temperature in step 156. After being fired at 157, step 156
Return to In step 156, when the temperature rises above the set temperature, the program ends and the boiling buzzer sounds.

In the above embodiment, when the number n of execution modes reaches the predetermined number N, the correction mode is entered. However, each time the execution mode is performed for a predetermined time or more,
You may make it transfer to a correction mode. At that time, the operating time of the pressure sensor 23 may be used as the predetermined time of the execution mode. As the operating time of the pressure sensor 23, for example, the time from the first pressure detection by the pressure sensor 23 to the last pressure detection is used.

[0042]

According to the hot water beam control method and control device for a bathtub of the present invention, the hot water beam execution mode and the pressure sensor correction mode are distinguished from each other, and the hot water beam execution mode is performed a predetermined number of times, for example. The correction mode is performed every time, and as a result, the speed of the hot water beam can be increased.
It is possible to cope with the secular change of the pressure sensor and the like.

[Brief description of drawings]

FIG. 1 is a block diagram of a water heater having a hot water beam control function according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a bath tub showing an embodiment of the present invention.

FIG. 3 is a flowchart of a hot water beam control method according to an embodiment of the present invention.

FIG. 4 is a flowchart of a hot water beam control method according to an embodiment of the present invention.

[Explanation of symbols]

 10 ... Bath kettle 12 ... Circulation pipeline 13 ... Burner 14 ... Heat exchanger 15 ... Pump 16 ... Thermistor 17 ... Flow sensor 18 ... Bathtub 20 ... Flow sensor 21 ... Water pipe 22 ... Hot water pipe 23 ... Pressure sensor 24 ... Pouring Solenoid valve 30 ... Discrimination unit 31 ... Control unit 33 ... Addition unit 34 ... Storage unit 35 ... Drive circuit

Claims (6)

[Claims] 1. A hot water boil control for a hot water bath, which circulates water in a hot water bath in a circulating pipeline, detects the water level of the bath by the output value of a pressure sensor provided in the circulating pipeline, and controls the hot water. In the method, each time the hot water beam execution mode is performed a predetermined number of times, the pressure sensor correction mode is performed, and a predetermined amount of water is poured into the bathtub, and a circulatory reference water level equal to or higher than the circulating water level equivalent to the inlet of the circulation pipe line of the bathtub A hot water beam control method for a bathtub, wherein the hot water beam is discharged and the reference output value recorded in the storage unit is rewritten to the output value of the pressure sensor when the hot water beam is discharged. 2. A hot water boil control for a hot water bath, which circulates water in the hot water bath in a circulating pipeline, detects the water level of the bath by the output value of a pressure sensor provided in the circulating pipeline, and controls the hot water. In the method, every time the running time of the hot water beam execution mode reaches a predetermined time, the correction mode of the pressure sensor is performed, and a predetermined amount of water is poured into the bathtub, and circulation equivalent to the inlet of the circulation pipe line of the bathtub is possible. A hot water beam control method for a bathtub, characterized in that the hot water beam is heated to a level higher than the standard water level, and the reference output value recorded in the storage unit is rewritten to the output value of the pressure sensor when the hot water beam is applied. . 3. After the hot water has been heated to a level above the reference level of the bathtub, a constant amount of water is further poured based on the output value of a water amount sensor that detects the amount of hot water, and the hot beam is moved to above the reference level of the bath. When calculating the constant water amount poured from the reference output value of the pressure sensor and the pressure value of the pressure sensor when pouring the further constant water amount, the output value of the water amount sensor, the calculated constant water amount 3. The method for controlling hot water in a bathtub according to claim 1, wherein the value is corrected to the numerical value of. 4. The actual water amount when the hot water beam is heated above the reference water level and the reference water amount which is planned when the hot water beam is heated above the reference water level are compared to obtain the actual water amount and the reference water amount. 4. The method for controlling hot water in a bathtub according to claim 1, 2 or 3, wherein the correction mode is not performed when there is residual water in the bathtub when the difference between the above is greater than the allowable range. 5. A hot water boil control for a hot water bath, which circulates water in a hot bath in a circulating pipeline, detects the water level in the bath by the output value of a pressure sensor provided in the circulating pipeline, and controls the hot water. In the apparatus, a storage unit in which the reference output value of the pressure sensor is recorded, and, every time the reference output value is recorded in the storage unit, the number of execution modes of the hot water beam after the reference output value is recorded is indicated. An addition unit for adding, a determination unit for determining whether or not the number of execution modes has reached a predetermined number, and when the determination unit determines that the predetermined number has been reached, a correction mode is performed to set a predetermined amount of water in the bath. Refilling control in the storage unit so that the reference output value is rewritten to the output value of the pressure sensor when the hot water is poured to the circulating water level equal to or higher than the circulating water level corresponding to the inlet of the circulation pipe of the bathtub. It has a control unit that outputs a signal Control device for bathtub water. 6. A hot water boil control for a hot water bath, which circulates water in a hot bath in a circulating pipeline, detects the water level in the bath by the output value of a pressure sensor provided in the circulating pipeline, and controls the hot water. In the apparatus, a storage unit in which the reference output value of the pressure sensor is recorded, and every time the reference output value is recorded in the storage unit, the running time of the hot water beam execution mode after the reference output value is recorded. An addition unit for adding, a determination unit for determining whether or not the operating time of the execution mode has reached a predetermined time, and a determination mode for determining that the determination unit has reached the predetermined time, the correction mode is performed and In order to rewrite the reference output value to the output value of the pressure sensor when pouring a predetermined amount of water at a time and hot water above the circulatory reference water level corresponding to the inlet of the circulation conduit of the bathtub, the storage unit is rewritten. And a control unit that outputs a rewrite control signal A hot water beam control device for a bathtub.