JP2553414B2 - Automatic hot water method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for hot-watering a bathtub to a set water level with an automatic hot-watering device.

[0002]

2. Description of the Related Art Heretofore, as this kind of automatic hot water boiling device, one disclosed in, for example, Japanese Patent Laid-Open No. 2-267459 is known.

This hot water beaming device is provided with a hot water supply device which is connected to a hot water supply port (bus adapter) provided at a side wall portion at a lower portion of the bathtub through a hot water supply passage, and the hot water in the bathtub is heat-exchanged in the hot water supply passage. A circulation path for additional cooking while being circulated through is formed, and a water level sensor for detecting the water level in the bathtub by water pressure is provided.

In this hot water beam device, the set water level of the hot water beam to the bathtub is stored in advance on the basis of the position of the hot water supply port, and the hot water beam to the set water level is performed as follows.

That is, first, when the hot water is first poured into the bathtub, hot water is supplied from the water heater to the bathtub in a fixed amount (for example, 10 liters), and the circulating passage is operated by a pump for each hot water supply. Whether or not the hot water in the bathtub has reached a water level above the hot water supply port is detected by detecting the presence or absence of circulation by a water flow switch provided in the passage.

When it is detected that the hot water in the bathtub has reached the water level above the hot water supply port, the water level detected by the water level sensor is stored as a reference water level for the set water level, and then a predetermined amount (for example, (40 liters) of hot water is supplied to the bathtub, and the amount of rise in water level at the time of hot water supply is detected by the water level sensor.

Then, the bathtub cross-sectional area after the water level rise is obtained from the water level rise amount and the predetermined amount, and after this is obtained, the difference between the current water level and the set water level is multiplied by the bathtub cross-sectional area. Supply the amount of hot water obtained to the bathtub.

In this case, if the cross-sectional area of the bathtub is constant regardless of the height, the water level in the bathtub should reach the set water level by this hot water supply, but generally, the cross-sectional area of the bathtub is The water level in the bathtub does not reach the set water level because the water level in the bathtub is higher toward the top.

For this reason, in this hot water beaming device, the bathtub cross-sectional area after the water level rise is obtained from the hot water amount obtained by the above multiplication and the water level rise amount at this time, and the bathtub cross-sectional area thus obtained is obtained. Is supplied to the bathtub by the amount of hot water obtained by multiplying the difference between the current water level and the set water level, or this hot water supply is repeated several times so that the final water level in the bathtub approaches the set water level. ing.

However, in such a hot water beaming device, it is possible to automatically perform hot water beaming up to the set water level with relatively high accuracy in a bathtub having a relatively small change in the cross-sectional area of the bathtub. In most recent bathtubs, the cross-sectional area of the bathtub tends to widen and change greatly.

Therefore, when hot water is applied to such a bathtub by the hot water beam device, if the number of times of hot water supply obtained by the above multiplication is small, the final water level and the set water level are set. There was an inconvenience that the error of became large.

On the contrary, if the number of times of hot water supply is increased,
Although it is possible to reduce the error between the final water level and the set water level, there is a disadvantage that it takes a long time to boil the water up to the set water level because the hot water supply frequency increases.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a method capable of accurately performing hot water burr up to a set water level in a bathtub in a short time.

[0014]

As a result of various investigations, the inventors of the present invention can consider that the change rate of the cross-sectional area with respect to the water level in a normal bathtub is substantially constant. By finding the rate of change of the cross-sectional area in the middle of hot water boiling, it is possible to find the amount of hot water required to perform hot water boiling up to the set water level based on the rate of change. Obtained.

Therefore, in order to achieve such an object, the present invention detects hot water supply means connected to a hot water supply port formed at a lower portion of a bathtub through a hot water supply passage and a water level in the bathtub through the hot water supply port. In order to do so, the water level detection means provided in the hot water supply passage, the residual hot water detection means for detecting whether the hot water in the bathtub is at a water level equal to or higher than the hot water supply port, and the preset water level of the hot water beam for the bathtub are set in advance. A method of performing hot water beaming to the set water level in the bathtub by using a hot water beam device equipped with a storage means that stores the hot water in the bathtub to a level above the hot water supply port by the residual hot water detecting means. A first hot water supply step of supplying hot water to the bathtub by the hot water supply means until it is detected, and a water level detected by the water level detection means after the hot water supply is stored in the storage means as a reference water level of the set water level. 1 memory process A second hot water supplying step of supplying a predetermined amount of hot water to the bathtub by the hot water supplying means after the storage, and a water level increase amount detected by the water level detecting means and the predetermined amount during the second hot water supplying step. A second storage step of obtaining a bathtub reference cross-sectional area at the water level and storing it in the storage means;
After the second hot water supplying step, a third hot water supplying step of supplying hot water to the bath by the hot water supplying means by multiplying the difference between the water level detected by the water level detecting means and the set water level by the bathtub reference cross-sectional area. After the hot water supply, the rate of increase of the bathtub cross-sectional area with respect to the unit water level rise amount of the bathtub is obtained from the hot water supply amount at this time, the water level rise amount detected by the water level detection means, and the bathtub reference cross-sectional area, and the storage is performed. A third storage step of storing in the means, and the water level in the bath from the actual water level to the set water level by the actual water level, the set water level, the bathtub reference cross-sectional area, and the rate of increase in the bathtub cross-sectional area after the storage. And a fourth hot water supply step of supplying the insufficient hot water amount to the bathtub by the hot water supplying means.

Further, after the above-mentioned hot water boiling, there is provided a hot water beaming step for newly hot watering the bathtub to the set water level,
The hot water beaming step comprises a step of supplying hot water to the bathtub by the hot water supply means until the hot water in the bathtub reaches a water level equal to or higher than the hot water supply port.
After the hot water is supplied, it is necessary to increase the water level in the bath from the water level to the set water level by the water level detected by the water level detection means, the set water level, the bathtub reference cross-sectional area, and the increase rate of the bathtub cross-sectional area. Determining the amount of insufficient hot water, and supplying the amount of insufficient hot water to the bathtub by the hot water supply means.

[0017]

According to the present invention, the amount of hot water supplied to the bathtub in the third hot water supply step is obtained by multiplying the difference between the water level detected immediately after the second hot water supply step and the set water level by the bathtub reference cross-sectional area. Therefore, if the bathtub cross-sectional area is constant regardless of the water level, the bathtub water level reaches the set water level after the third hot water supply step.

However, since the cross-sectional area of the bathtub generally increases toward the upper part, the water level of the basin does not reach the set water level. In this case, if the increase rate of the bathtub cross-sectional area with respect to the unit water level rise is considered to be constant, the increase rate of the bathtub cross-sectional area is calculated from the water level rise and hot water supply amount in the third hot water supply step and the bathtub reference cross-sectional area. Desired.

After the increase rate of the bathtub cross-sectional area is obtained, the actual water level at this time is calculated from the actual water level, the set water level, the bathtub reference cross-sectional area, and the increase rate of the bathtub cross-sectional area. The amount of insufficient hot water required to increase the water level in the bathtub to the set water level is obtained, and by supplying this amount of insufficient hot water to the bathtub, the bathtub is boiled to the set water level.

Further, after the hot water beam is applied,
Since the bathtub reference cross-sectional area and the rate of increase in the bathtub cross-sectional area are stored in the storage means, next, when hot water is poured into the bathtub, after hot water is supplied to the bathtub to a water level equal to or higher than the hot water supply port, The water level at that time, the set water level, the bathtub reference cross-sectional area, and the rate of increase in the bathtub cross-sectional area are used to determine the amount of insufficient hot water required to increase the water level in the bathtub from the current water level to the set water level. By supplying the amount of hot water at once to the bathtub, the bathtub is boiled to the set water level.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the hot water sprinkling method of the present invention will be described with reference to FIGS.

FIG. 1 is an explanatory view for explaining a schematic structure of an automatic hot water beaming device, and FIGS. 2 and 3 are explanatory views for explaining how the water level changes when hot water is poured into a bathtub. 4 to 7 are flowcharts for explaining the hot water welding method.

In FIG. 1, 1 is a hot water supply means, 2 is a bathtub, 3 is a hot water supply passage for a bathtub provided from the hot water supply means 1 to the bathtub 2,
Reference numeral 4 is a control means for controlling the operation of the hot water supply means 1 and the like.

The hot water supply means 1 is provided with a water passage pipe 6 penetrating the hot water supply heat exchanger 5, and water supplied from a water pipe or the like (not shown) to the water passage pipe 6 is heated by the heat exchanger 5 and discharged. I am trying. In this case, the downstream end of the water pipe 6 is
It is branched into a regular water pipe 7 connected to a hot-water tap (not shown) in a kitchen or a washroom and a bathtub water pipe 8 connected to the bathtub hot water supply passage 3, and the water pipe 6 can be selected by the user. While it is possible to supply hot water to the kitchen or the like via the regular water supply pipe 7, it is possible to supply hot water from the water supply pipe 6 to the bathtub 2 through the bathtub water supply pipe 8 and the bathtub hot water supply passage 3.

An inlet water temperature thermistor 9 and an inlet water amount detector 10 are provided in the upstream portion of the water pipe 6 and in the downstream portion.
A hot water amount servo 11 and a hot water outlet thermistor 12 for controlling the hot water supply amount are provided.

The bathtub hot water supply passage 3 is provided with a circulation passage 13 for circulating the hot water in the bathtub 2, and the bathtub water passage 8 has an electromagnetic valve 14, a hot water supply amount detector 15, and a hopper. 16, the check valve 17 and the three-way valve 18 are connected in this order to the circulation path 13. The hot water supply amount detector 15 outputs a signal according to the flow rate per unit time in the bathtub water pipe 8.

The circulation path 13 is an outward path 13a from the three-way valve 18 to the bathtub 2 via the circulation pump 19 and the bath heat exchanger 20, and a return path 1 from the three-way valve 18 directly to the bathtub 2.
3b, and the outward path 13a and the return path 13b are the bathtub 2
Circulating metal fittings 22 are attached to the hot water supply port 21 formed on the lower side wall of the
Connected through. A water flow switch 23 for detecting the presence / absence of water flow in the circulation path 13 and a bath water temperature thermistor 24 are provided in the middle of the outward path 13a, and the water level in the bathtub 2 is supplied to the hot water supply port in the middle of the return path 13b. Water level detection means 25 for detecting via 21 is provided. In this case, the water level detection means 25 is composed of, for example, a pressure sensor that detects the water level in the bathtub 2 as a hydrostatic pressure corresponding to the water level, and the hot water in the bathtub 2 is at a water level equal to or higher than the hot water supply port 21. At times, a signal is output according to the water level.

In the bathtub hot water supply passage 3, for example, when hot water is to be poured into the bathtub 2, the solenoid valve 14 is opened and the hot water supply means 1 through the water pipe 6 for bathtub.
And hot water is supplied to the bathtub 2 through the circulation path 13. In this case, the circulation path 1 is passed from the bath water passage 8 through the three-way valve 18.
The hot water flowing into the bath 3 flows from the three-way valve 18 to both the outward path 13a and the return path 13b to reach the bathtub 2, and the hot water is supplied to the bathtub 2 by so-called both transports.

Further, for example, when boiling the hot water in the bathtub 2, the circulation pump 19 with the solenoid valve 14 closed.
Is operated to circulate the hot water in the bathtub 2 through the circulation path 13, and at this time, the hot water in the bathtub 2 is operated to move the hot water in the bathtub 2 to the outward path 13 of the circulation path 13.
The heating is performed at a.

In the circulation path 13, the circulation pump 19 and the water flow switch 23 are combined, and the residual hot water detection for detecting whether or not the hot water in the bathtub 2 is at a water level above the hot water supply port 21 (presence or absence of residual hot water) The means 26 is configured to detect the presence or absence of residual hot water by detecting the presence or absence of a water flow by the water flow switch 23 when the circulation pump 19 is operated.

The control means 4 includes a CPU 27 and a RAM.
A control circuit unit 30 having (storage means) 28, a ROM 29, and the like, an operation unit 31 and a display unit 32 connected to the control circuit unit 30 are provided.

In the control circuit section 30 of the control means 4, the incoming water temperature thermistor 9, the incoming water amount detector 10, the hot water outlet temperature thermistor 12, the hot water supply amount detector 15, the water flow switch 23, the bath water hot water thermistor 24 and the water level. The output signal of the detection means 25, the setting data by the operation device 31, etc. are input,
The CPU 27, according to these input data, a program stored in advance in the ROM 29, and the like, the hot water supply heat exchanger 5 of the hot water supply means 1, the hot water amount servo 11, the solenoid valve 14, the circulation pump 19, the bath heat exchanger 20, and the display. The operations of 32 and the like are controlled, and various calculations to be described later are performed.

In this case, various operation menus such as "automatic hot water operation" and "automatic boiling operation" can be selected on the operation unit 31, and the bathtub 2 related to the "automatic hot water operation" can be selected. Set water level and "automatic boiling operation"
It is possible to input various setting data such as the setting hot water temperature related to.

Next, referring to FIG. 1, the operation of the automatic hot water beaming device when hot water is poured into the bathtub 2 will be described with reference to FIG.
It will be described with reference to FIGS.

In FIGS. 1 and 2, when hot water is to be poured into the bathtub 2, first, the "automatic hot water beam operation" is selected by the operating device 31. In this case, the user or the bathtub 2 in advance
The installation water level h _s
(See FIG. 6) is input, and the set water level h _s is stored in the RAM 28 of the control means 4.

The set water level h _s is as shown in FIG.
It is a water level based on the water level (reference water level H ₀ described later) at the hot water supply port 21 of the bathtub 2.

When the "automatic hot water beam operation" is selected, the hot water beam (hot water supply) having a predetermined amount v ₁ (for example, 5 liters) predetermined from the hot water supply means 1 to the bathtub 2 via the hot water supply passage 3 for the bathtub is supplied. Done.

That is, the control means 4 opens the solenoid valve 14.
By turning on the water and operating the hot water supply means 1,
Hot water supply to the hot water supply amount detector 2
The hot water supply amount per unit time detected by 5 is integrated,
The integrated value is a predetermined amount v₁Solenoid valve 14 is closed when reaching
To stop supplying hot water to the bathtub 2. Then, this predetermined amount v ₁
With the hot water beam, the water pipe 8 for the bathtub and the hot water supply passage 3 for the bathtub
Filled with hot water.

When a predetermined amount v ₁ of hot water is applied, next,
The control means 4 determines whether or not the automatic hot water beaming of the bathtub 2 has been performed for the first time, in other words, whether or not the "automatic hot water beaming operation" has been selected for the first time. That is, the RAM 2 of the control means 4
The memory 8 stores whether or not the "automatic hot water operation" has been selected up to the present time after the installation of the bathtub 2, and the control means 4 stores the "automatic hot water operation" in the RAM 28. Is selected for the first time.

If this is the first hot spring,
Further, the residual hot water detection means 26 determines whether or not there is residual hot water in the bathtub 2 (whether the hot water in the bathtub 2 is at a water level above the hot water supply port 21). Then, the "automatic hot water operation" is advanced according to the flowchart shown in FIG.

In this case, the solenoid valve 1 is used to determine the presence or absence of residual hot water.
4 is closed by operating the circulation pump 19, and at this time, if the hot water in the bathtub 2 is at a water level below the hot water supply port 21, the hot water does not circulate in the circulation path 13. The water flow switch 23 is not turned on, and it is determined that there is no remaining hot water. On the contrary, when the hot water in the bathtub 2 is at the water level equal to or higher than the hot water supply port 21, the hot water circulates in the circulation path 13 and the water flow switch 23 is turned on, whereby it is determined that "remaining hot water is present".

In addition, when it is judged that it is not the first time when it is judged whether hot water is applied for the first time, and when it is judged that "remaining hot water is present" in the judgment of presence or absence of residual hot water, respectively. 4 and the flowchart shown in FIG. 5, the "automatic hot water welding operation" is performed, which will be described later.

In the above judgment, when it is judged that "no hot water is left", next, a predetermined amount v ₂
(For example, 10 liters) each, add hot water to the bathtub 2,
The hot water burr of the predetermined amount v ₂ is repeatedly performed until the hot water in the bathtub 2 reaches the water level above the hot water supply port 21.

That is, the control means 4 controls the predetermined amount v ₁
By operating the hot water supply means 1 and the solenoid valve 14 in the same manner as in the case of the hot water beam, a predetermined amount v ₂ of hot water beam is performed, and the residual hot water detecting means 2 is set for each hot beam in the same manner as described above.
The presence or absence of the residual hot water is determined by 6. Then, in the determination for each hot water beam of the predetermined amount v ₂ , “remaining hot water is present” twice in a row.
When it is determined that the hot water beam operation for each predetermined amount v ₂ is completed, the process proceeds to the next step.

Also, this predetermined amount v₂Scented hot water smell
The control means 4 controls the predetermined amount v ₂How many times do you want to
A place where a count is made and the number of counts is predetermined
Even after a certain number of times N (eg 20 times) or more, "remaining hot water"
If not determined, drainage port of the bathtub 2 (not shown)
In this case, there is a possibility that the
After notifying the user by displaying an error with the device 32
Then, stop the "automatic hot water operation".

When the hot water beam operation for each predetermined amount v ₂ is completed as described above, the control means 4 then detects the current water level H ₀ by the water level detection means 25, as shown in FIG. At the same time, the current bath water amount V ₀ is calculated.

In this case, since the current water level H ₀ is the water level after it is determined that there is "remaining hot water", it reaches the water level above the hot water supply port 21 as shown in FIG. Since it is the water level after it is continuously determined that there is "remaining hot water", the water level has definitely reached the hot water supply port 21. Therefore, also in the circulation path 13 and the like (see FIG. 1), the air mixed when the hot water in the bathtub 2 is circulated to determine the remaining hot water is removed and the hot water is filled, and the water level detecting means 25 is used. The current water level H ₀ is reliably detected.

Further, the current bath water amount V ₀ is the predetermined amount v
It is calculated by the following equation using the final number n of the ₂ hot water beams.

V ₀ = n · v ₂ + v ₁ (1) In the equation (1), the predetermined amount v ₁ is basically the hot water supply to the bathtub hot water supply passage 3 or the like. The term of v ₁ may be omitted because it is for satisfying.

As described above, the detected current water level H ₀ and the calculated current bath water amount V ₀ are stored in the RAM 28 of the control means 4 as the reference water level H ₀ and the reference bath water amount V ₀ , respectively, as shown in FIG. Remembered.

Next, referring to FIGS. 3 and 6, the control means 4 controls the hot water supply means 1 to a predetermined amount V.
₁ (for example, 20 liters) hot water is applied to the bathtub 2, and after the hot water is applied, the current water level H ₂₀ is detected by the water level detecting means 25 and stored in the RAM 28.

The present water level H ₂₀ and the reference water level H
_{Using 0} , the average cross-sectional area of the bathtub 2 (bathtub reference cross-sectional area S ₀ ) between the water levels H ₀ and H ₂₀ is calculated by the following equation and stored in the RAM 28.

S ₀ = V ₁ / (H ₂₀ −H ₀ ) = V ₁ / h ₂₀ (2) where h ₂₀ is the water level rise H ₂₀ due to the predetermined amount V ₁ of the hot water beam.
-H ₀ . It should be noted that the predetermined amount V ₁ is such that the water level rise amount h ₂₀ from the water level H ₀ to the water level H ₂₀ by this hot water beam can be regarded as a substantially constant cross-sectional area of the bathtub 2 between these water levels H ₀ and H _20. Is set to be a relatively small value.

[0054] Then, the control unit 4 is equal to the water level H in ₂₀ above water level the cross-sectional area of the tub 2 is the tub reference cross-sectional area S _0, and assumed to be constant, the set water level from the current level H ₂₀ The amount of hot water required to fill the bathtub 2 up to h _s (temporary insufficient hot water amount V ₂ ) is determined. In this case, the set water level h
_{Since s} is the water level based on the reference water level H ₀ as described above (see FIG. 6), the temporary insufficient hot water amount V ₂ is obtained by the following equation.

V₂= (H_s-H₂₀) ・ S₀ (3) Then, the control means 4 causes the temporary shortage by the hot water supply means 1.
Hot water amount V₂Apply the hot water beam to bathtub 2 and after this hot beam
Water level H_xIs detected by the water level detecting means 25, and
This current water level H_x, The water level H₂₀, Insufficient hot water amount V₂And bath
Tank standard cross-sectional area S ₀, As described below.
Cross-sectional area of the bathtub 2 per amount of rising water level (for example, 1 cm)
The increase rate dS of is calculated.

That is, in FIG. 6, the bathtub 2 has an upwardly widening shape, and the cross-sectional area thereof gradually increases from the lower part to the upper part of the bathtub 2. Therefore, the water level h _x = H _x -H ₀ from the reference water level H ₀ after hot beam of temporary lack hot water V ₂ are not reach the set water level h _s, a smaller value than the set water level h _s.

Then, in this case, it is apparent from FIG. 6 that the temporary insufficient hot water amount V ₂ obtained by the above equation (3) is
This is the amount of hot water in the part surrounded by the broken line.
Equal to the actual quantity of water between ₂₀ and H _X.

In this case, in a normal bathtub,
The rate of increase of the cross-sectional area per unit water level rise can be considered to be approximately constant.

Therefore, if the increase rate dS of the cross-sectional area per unit water level rise in the bathtub 2 is an unknown number, the water level H
Sectional area S _X is the _X, by using the this unknowns dS and tub reference cross-sectional area S _0, is represented by the following _{formula, S x = S 0 + dS} · h X ...... (4) In addition, the water level H ₂₀ and H The actual amount of hot water between _X (= temporary insufficient hot water amount V ₂ ) is expressed by the following equation using the cross-sectional area S _X and the bathtub reference cross-sectional area S ₀ .

V ₂ = {(S _X + S ₀ ) / 2} · (H _X −H ₂₀ ) ... (5) Here, in the equation (5), (S _X + S ₀ ) / 2 is the water level H.
₂₀ shows the average cross-sectional area between ₂₀ and H _X , and the water level H ₂₀
The cross-sectional area at is equal to the bathtub reference cross-sectional area S ₀ .

Therefore, if the simultaneous equations consisting of the above equations (4) and (5) are solved for dS, the cross-sectional area increase rate dS becomes
It is calculated by the following formula.

DS = 2 {V ₂ −S ₀ · (H _X −H ₂₀ )} / {h _X · (H _X −H ₂₀ )} (6) Alternatively, in the equation (6), the above (3) It is calculated by the following equation obtained by substituting the equation.

DS = 2S ₀ · (h _s −h _x ) / {h _x · (H _x −H ₂₀ )} (6) ′ The control means 4 uses the equation (6) or the equation (6) ′. After calculating the cross-sectional area increase rate dS, the increase rate dS is then used to determine the final insufficient hot water amount V _X required to raise the water level from the current water level H _X to the set water level h _S. Calculate by formula.

V _X = (h _s −h _x ) · (Average cross-sectional area between water level h _X and set water level h _S ) = (h _s −h _x ) · [{(h _s + h _x ) / 2} ・dS + S ₀ ] (7) Then, as shown in FIG. 3, the control means 4 performs the hot water supply of the shortage hot water amount V _X calculated in this way by the hot water supply means 1, thereby setting the set water level in the bathtub 2. Hot water is applied until h _s . After that, the "automatic boiling operation" is performed. In this case, in Fig. 1, "Automatic boiling operation"
Is performed by circulating the hot water in the bathtub 2 in the circulation path 13 by the circulation pump 19 and appropriately heating it by the bath heat exchanger 20.
The hot water temperature is controlled by the control means 4 so as to reach a preset temperature.

As described above, in the "automatic hot water beam operation", when the operation is the first time, the cross-sectional area increase rate dS is calculated during the hot water beam up to the set water level h _s , and finally, By using the increase rate dS, the hot water beam with the insufficient hot water amount V _X obtained by the above equation (7) is carried out, whereby the hot water beam up to the set water level h _{s is} accurately performed.

On the other hand, when the "automatic hot water beam operation" is not the first time, after the hot water beam of the predetermined amount v ₁ (see FIG. 2),
"Automatic hot water operation" according to the flowchart shown in Fig. 4.
Is advanced.

That is, in this case, first, the control means 4 determines the presence or absence of the residual hot water by the residual hot water detecting means 26. When the result of this determination is "no residual hot water", the above-mentioned first time The hot water supply means 1 is the hot water supply amount 1 obtained by adding the hot water flow rate ΔV required to raise the water level from the reference water level H ₀ by a predetermined amount to the reference water level V ₀ obtained in the “automatic hot water operation”. The hot water is poured into the bathtub 2 at a time (see FIG. 7). In this case, the amount of hot water ΔV is calculated by the following equation using the cross-sectional area increase rate dS and the bathtub reference cross-sectional area S ₀ , where Δh is the predetermined amount (predetermined water level increase amount).

ΔV = {(Δh / 2) · dS + S ₀ } · Δh (8) Here, the terms in the braces of the equation (8) are the water levels H ₀ and H _0.
It is the average cross-sectional area between + Δh.

In this way, the reference bath water amount V ₀ is added to the hot water amount ΔV.
The amount of hot water added is to make sure that the water level in this hot water exceeds the hot water supply port 21 of the bathtub 2.
This is because it is possible to reliably detect the water level described later after this hot water refilling.

It should be noted that, obviously from the above, it is not always necessary to add the hot water amount ΔV to this hot water beam, and it is possible to hot water only the reference bath water amount V ₀ .

Next, the control means 4 again judges whether or not there is residual hot water after the V ₀ + Δv hot water has been poured. If the result of the judgment is "remaining hot water is present", the water level detecting means 25 indicates the present The water level H _x is detected.

In this case, when it is determined that "remaining hot water is present" before the hot water boiling of V ₀ + Δv, the control means 4 makes V ₀ + Δ
v omitted the hot water beams to detect the current water level H _X.

Further, the control means 4 may open the drainage port (not shown) of the bathtub 2 when it is judged that there is no remaining hot water after the hot water of V ₀ + Δv has been poured. After an error is displayed by the device 32 to inform the user, the "automatic hot water operation" is stopped.

As described above, the current water level H_XDetect
Then, the control means 4 determines the current water level H. _XFrom set water level h
_SFinal amount of hot water V required to raise the water level to
_XIs calculated from the above formula (7), and
V_XHot water is poured into the bathtub 2 by the hot water supply means 1 and
And set water level h_SHot water is applied to the bathtub 2.

Therefore, the "automatic hot water operation" after the second time
In FIG. 7, as shown in FIG. 7, the hot water amount V ₀ + Δv and the insufficient hot water amount V _X are two times to be performed in a short time.

Next, in the first "automatic hot water beam operation", the operation when the "remaining hot water" is determined by the residual hot water determination after the predetermined amount v ₁ of hot water beam (see FIG. 2) is simple. Explained. In this case, the "automatic hot water operation" is performed according to the flowchart shown in FIG.

That is, the control means 4 first detects and stores the current water level H _X after the above residual hot water determination, and then,
After performing hot water welding with a predetermined amount V ₄ (for example, 20 liters) set in advance, remaining hot water determination is performed. And
In this residual hot water determination, when it is determined that there is no residual hot water, there is a possibility that the drainage port (not shown) of the bathtub 2 is open. Therefore, after an error message is displayed to inform the user, “ Stop the automatic hot water operation.

On the other hand, when it is determined that "remaining hot water is present",
Current water level H_yTo detect this water level H _yBased on the above,
Water level H₀Temporary standard water level Ha corresponding to
Area S₀The temporary bathtub reference cross-sectional area Sa corresponding to
After calculating and memorizing so that the
"Transfer" ends.

That is, in this case, the control means 4 considers that the water level in the bathtub 2 has reached the set water level h _s by the predetermined amount V ₄ of hot water, and calculates the temporary reference water level Ha by the following equation. .

Ha = H_y-H_S (9) Actually, as is clear from FIG. 6, the current water level H_yBut
Assuming that the set water level has been reached, the above equation (9) is used.
The provisional standard water level Ha required is the standard water level H ₀Matches
I do.

The temporary bathtub reference cross-sectional area Sa is the average cross-sectional area of the bathtub 2 between the water levels H _X and H _y , as in the equation (2) for calculating the bathtub reference cross-sectional area S ₀ . It is calculated by the following formula.

Sa = V ₄ / (H _y −H _X ) ... (10) In this way, the temporary reference water level Ha and the temporary bathtub reference cross-sectional area Sa calculated and stored in this way are, for example, the user's bathtub 2 It is used when you add foot bath. That is, for example, when the user sets a desired water level rise amount using the operation device 31, the control means 4 determines the required hot water amount according to a predetermined arithmetic expression using the temporary reference water level Ha and the temporary bathtub reference cross-sectional area Sa. It is roughly determined, and the required amount of hot water is supplied to the bathtub 2.

When the normal "automatic hot water beam operation" is performed again after this "automatic hot water beam operation", the "automatic hot water beam operation" is performed according to the same procedure as the first "automatic hot water beam operation". Hot water operation ”is progressed.

[0084]

As is apparent from the above description, according to the present invention, when hot water is poured into the bathtub up to the set water level, a predetermined amount of hot water is poured after the hot water is poured to the water level above the hot water supply port of the bathtub. Perform a beam to calculate the bathtub reference cross-sectional area, and then perform a hot water beam with the amount of hot water obtained by multiplying the amount of rise in water level required from the current water level to the set water level by the bathtub reference cross-sectional area. It is necessary to calculate the rate of increase in the cross-sectional area of the bathtub per unit rise in the water level using the subsequent water level, and to use the calculated rate of increase in the cross-sectional area to raise the water level from the current water level to the set water level. By determining the amount of hot water and performing the amount of hot water to be obtained, it is possible to accurately perform the amount of hot water to the set water level, regardless of the shape of the upward spread of the bathtub or the like.

When the hot water beam is newly made after the hot water beam, it is necessary to raise the water level from the water level at this time to the set water level after the hot water beam has been heated to a water level above the hot water supply port of the bathtub. Obtain the amount of hot water using the cross-sectional area increase rate,
By performing the hot water beam with the obtained hot water amount at once, the hot water beam up to the set water level can be accurately performed, and the hot water beam can be efficiently performed in a short time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining a schematic configuration of an automatic hot water beaming apparatus to which an example of the automatic hot water beaming method of the present invention is applied.

FIG. 2 is a flowchart for explaining the hot water sprinkling method.

FIG. 3 is a flowchart for explaining the hot water sprinkling method.

FIG. 4 is a flowchart for explaining the hot water sprinkling method.

FIG. 5 is a flowchart for explaining the hot water sprinkling method.

FIG. 6 is an explanatory diagram for explaining how the water level changes when hot water is poured into the bathtub.

FIG. 7 is an explanatory diagram for explaining how the water level changes when hot water is poured into the bathtub.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hot water supply means 2 ... Bathtub 3 ... Bathtub hot water supply path 21 ... Hot water supply opening 25 ... Water level detection means 26 ...
Remaining hot water detection means 28 ... RAM (storage means)

Claims (2)

(57) [Claims] 1. A hot water supply means connected to a hot water supply port formed in a lower part of a bathtub through a hot water supply passage, and a water level detection provided in the hot water supply passage for detecting the water level in the bathtub through the hot water supply outlet. A hot water beam device comprising: means, a residual hot water detection means for detecting whether hot water in the bathtub is at a water level equal to or higher than the hot water supply port, and a storage means for storing a preset hot water level for the bathtub in advance. A method of hot-water boiling in the bathtub to the set water level by the hot water supply means until the residual hot water detection means detects that the hot water in the bathtub has reached a water level above the hot water supply port. A first hot water supply step for supplying hot water to the bathtub;
A first storage step of storing the water level detected by the water level detection means in the storage means as a reference water level of the set water level after the hot water supply, and a second step of supplying a predetermined amount of hot water to the bathtub by the hot water supply means after the storage In the hot water supply step and the second hot water supply step, a bathtub reference cross-sectional area at the water level is obtained from the water level rise amount detected by the water level detection means and the predetermined amount, and stored in the storage means. After the storing step and the second hot water supplying step, the hot water supplying means supplies the hot water amount to the bathtub by multiplying the difference between the water level detected by the water level detecting means and the set water level by the bathtub reference cross-sectional area. The third hot water supply step, and after the hot water supply, the bathtub cross-sectional area for the unit water level rise amount of the bathtub from the hot water supply amount at this time, the water level rise amount detected by the water level detection means, and the bathtub reference cross-sectional area. A third storage step of obtaining an increase rate and storing it in the storage means, and after the storage, from the actual water level by the actual water level, the set water level, the bathtub reference cross-sectional area, and the increase rate of the bathtub cross-sectional area. An automatic hot water refilling method, comprising: a fourth hot water supply step of determining the amount of insufficient hot water required to increase the water level in the bathtub to a set water level and supplying the insufficient hot water amount to the bathtub by the hot water supply means. 2. A hot water beaming step of newly hot watering the bathtub to the set water level after the hot water beaming according to claim 1,
The hot water beaming step comprises a step of supplying hot water to the bathtub by the hot water supply means until the hot water in the bathtub reaches a water level equal to or higher than the hot water supply port.
After the hot water is supplied, it is necessary to increase the water level in the bath from the water level to the set water level by the water level detected by the water level detection means, the set water level, the bathtub reference cross-sectional area, and the increase rate of the bathtub cross-sectional area. 2. The automatic hot water sprinkling method according to claim 1, further comprising the step of: determining a sufficient hot water amount and supplying the hot water amount to the bathtub by the hot water supply means.