JPH05126409A - Device for filling bathtub with hot water - Google Patents

Abstract

PURPOSE:To reduce a time required for filling a bathtub with hot water by calculating the product of a preset water level and the unit quantity of water p which is necessary for raising a hot water level in the bathtub by a unit water level, to find a hot water quantity necessary for filling the bathtub, comparing the hot water quantity thus found with the feed rate of hot water to the bathtub, and controlling the filling of the bathtub to be stopped when the feed rate of hot water exceeds the necessary quantity of hot water. CONSTITUTION:A bathtub 2 and a heat exchanger 21 for additional heating are connected to each other with a circulating path 22 of hot water for additional heating, and a water level sensor 11, a circulating pump P and a water flow switch F are interposed on the way of the said circulating path 22. Further, a hot water feeding path led from a heat exchanger 14 for feeding hot water is connected to the circulating path 22 at a place between the water level sensor 11 and the circulating pump P, and a bathtub filling valve 10 and a reverse flow preventing device 15 are provided on the way of said hot water feeding path. The unit quantity of water, which is necessary for raising a hot water level in the bathtub 2 by a unit water level, is set in a controller 3 and, after the product of the water level thus set and a water level set by a water level setter 12 is calculate to find a hot water quantity necessary for filling the bathtub, the controller 3 compares the feed rate of hot water to the bathtub 2, which is counted by a flow rate counter Q, with the hot water quantity necessary for filling the bathtub, and closes the bathtub filling valve 10 when the feed rate of hot water exceeds the necessary 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 water filling device, and more particularly to a water filling device which performs a water filling operation based on a required amount of water filling calculated from a set water level.

[0002]

2. Description of the Related Art As a water filling device for automatically stopping the water filling operation when the water level in a bathtub reaches a set water level, for example, the water filling having the structure shown in FIG. 8 disclosed in the specification of Japanese Utility Model Laid-Open No. 2-91924. There is a device. A flow rate counter (Q), a water filling valve (10), and a water level sensor (11) are inserted in this order from the upstream side of the hot water supply circuit (1) connected to the bathtub (2). still,
The water level sensor (11) is composed of a water pressure gauge that detects the water pressure in the bathtub via the hot water supply circuit (1).

Each of these parts is connected to the control device (3) by wiring, and the control device (3) further includes an operation switch (13) and a water level setting device (12) arranged on the wall surface of the bathroom. Output is being applied. In this case, when the operation switch (13) is turned on, the hot water filling valve (10) is opened and the hot water supply operation to the bathtub (2) is performed intermittently. Hot water (eg 10 liters) in a bath
The water filling valve (10) is closed each time it is supplied to (2). That is, the bathtub
Hot water supply to (2) and stopping are repeated intermittently to advance the filling operation.

The water level in the bathtub detected by the water level sensor (11) when the water filling valve (10) is closed is the water level setting device (1).
When it becomes equal to the set water level in 2), the filling operation is completed at this point. However, in the above-mentioned conventional one, the bathtub
Since it is necessary to proceed with the hot water filling operation while performing intermittent hot water filling by alternately repeating hot water supply to (2) and stopping hot water supply,
There was a problem that it took a long time to perform the water filling operation.

The present invention has been made in view of the above-mentioned points, and "a hot water supply circuit (1) connected to a bathtub (2) and the hot water supply circuit (1)"
Flow counter (Q) and water filling valve (10) inserted in
In addition, a water level setting device (1
2), and a hot water filling device configured to supply hot water in the bathtub (2) up to the hot water filling level set by the water level setting device (12) '', the problem is to shorten the time required for hot water filling. And [Invention of Claim 1]

[0006]

[Technical Means] The technical means of the present invention for solving the above problems will be described with reference to the conceptual diagram of FIG. 1. The technical means of the invention of claim 1 is that "the water level in the bathtub (2) is Calculate the product of the unit water volume setter (4) that sets the unit water volume necessary to raise only the unit water level and the set water volume of the unit water volume setter (4) and the water level setter (12). The latter is supplied by comparing the multiplication circuit (41) for determining the amount of water required for filling water with the amount of water required for filling water output by the multiplication circuit (41) and the amount of hot water supplied to the bathtub (2) measured by the flow rate counter (Q). Flow rate comparator that issues a water filling stop signal when the amount exceeds the former required water filling amount
(42) is provided so that the water filling valve (10) is kept closed by the water filling stop signal of the flow rate comparator (42).

[0007]

The above technical means operates as follows. When the filling water level is set in the water level setting device (12), the filling water level and the unit water amount stored in the unit water amount setting device (4) are multiplied by the multiplication circuit (41).
Is multiplied by. Then, in the unit water volume setting device (4),
Since the amount of water required to raise the water inside the bathtub (2) by the unit water level is stored, this and the above water level setting device (12)
The output of the multiplication circuit (41) for calculating the product of the set water level of
It indicates the amount of water required to raise the inside of the bathtub (2) to the set water level of the water level setting device (12).

In this state, when the filling operation is performed in the same manner as the conventional one, the filling valve (10) is opened and the filling operation is started. Then, the flow rate counter (Q) starts to measure the amount of hot water supplied to the bathtub (2), and the measured amount of hot water supplied and the output of the multiplication circuit (41) (the inside of the bathtub (2) is raised to the filling water level). The amount of water required for) is continuously compared by the flow rate comparator (42). And the bathtub (2) measured by the flow counter (Q)
When the amount of hot water supplied to the multiplier circuit (41) is greater than or equal to the required amount of water calculated by the multiplier circuit (41), a signal for stopping the filling of water is issued from the multiplication circuit (41), and the signal causes the filling valve (10) to close and the filling operation is completed. To stop.

[0009]

The invention of claim 1 has the following unique effect. It is not necessary to interrupt the hot water supply to the bathtub (2) unlike the conventional one, in which the hot water supply operation to the bathtub (2) is performed intermittently. The time required to fill the water can be shortened as much as there is not.

When the filling water level is changed during filling, the output of the changed water level setting device (12) and the unit water amount setting device
The unit amount of water stored in (4) is multiplied by the multiplication circuit (41) to recalculate the required amount of water to be filled, and when the flow counter (Q) counts the recalculated necessary amount of water. The water filling operation will be stopped. Therefore, according to the above technical means, it is possible to change the set water level during the water filling even in the type in which the required amount of water is calculated based on the set water level. [Invention of Claim 2] The invention of Claim 2 is Claim 1
The technical means of the invention of claim 2 which achieves the same purpose as the invention of claim 2 and is adopted for that purpose will be described with reference to the conceptual diagram of FIG. Insufficient water level calculator that calculates the difference between the water level inside the bathtub (2) detected by the water level sensor (11) when the water level sensor (11) is turned on and the water level set in the water level setter (12) ( 44),
The insufficient water level and the bathtub output by the insufficient water level calculator (44)
(2) A multiplication circuit (41) that calculates the product of the outputs of the unit water volume setting unit (4) that stores the unit water volume required to raise the unit water level inside, and obtains the required filling water volume, and the multiplication circuit (41) 41) The required amount of filling water output by the bath and the bathtub measured by the flow counter (Q)
A flow rate comparator (42) is provided, which compares the amount of hot water supplied to (2) and when the amount of hot water supplied by the latter exceeds the amount of water required for filling the former, a flow rate comparator (42) is provided, and the flow rate comparator (42) is provided. The water filling stop signal was used to keep the water filling valve (10) closed.
That is.

[0011]

The above technical means operates as follows. After setting the filling water level in the water level setting device (12), the operation switch (13)
When the water is poured in and the filling operation is performed, the water level sensor is
A difference between the water level in the bathtub (2) detected by (11) and the water level setting water level set in the water level setting device (12) is calculated by the insufficient water level calculator (44). That is, the insufficient water level calculator (44) calculates the insufficient water level necessary to raise the water level to the set water level of the water level setting device (12).

Next, the multiplying circuit (41) multiplies the insufficient water level output from the insufficient water level calculator (44) by the unit water amount stored in the unit water amount setting device (4). That is, the unit water amount necessary to raise the unit water level in the bathtub (2) and the insufficient water level output by the insufficient water level calculator (44) are multiplied by the multiplication circuit (41), whereby the water level setter ( Bathtub up to the set water level in 12)
(2) The required amount (volume) of water that needs to be supplied to the bathtub in order to raise the internal water level is required.

The output of the multiplication circuit (41) (tub
(2) The amount of water required to raise the inside to the set water level) and the output of the flow rate counter (Q) that measures the amount of hot water supplied to the bathtub (2) are continuously compared by the flow rate comparator (42). When the amount of hot water supplied to the bathtub (2) measured by the flow rate counter (Q) exceeds the required amount of hot water output from the multiplication circuit (41), the hot water filling stop signal from the flow rate comparator (42) causes the hot water filling. The valve (10) is closed and the filling operation is completed.

[0014]

The invention of claim 2 has the following unique effect. Similar to the invention of claim 1, the filling time can be shortened, and even if there is residual water in the bathtub (2), it is possible to fill the water accurately up to the set water level of the water level setting device (12). [Invention of Claim 3] The invention of Claim 3 is a bathtub.
A hot water supply circuit (1) connected to (2), a flow rate counter (Q) and a water filling valve (10) inserted in the hot water supply circuit (1), a water level sensor (11) for detecting the water level in the bathtub, and further A water level setting device (12) for setting the water level filled with water in the bathtub (2) is provided.
The water filling device for supplying hot water into the bathtub (2) up to the water filling level set in (12).
Similar to the invention described in (1), the time for filling water is shortened.

[0015]

The technical means of the invention of claim 3 for solving the above problems will be described with reference to FIG. 3. The technical means of the invention of claim 3 is that "a water level sensor ( 1
Based on the change in the water level in the bathtub detected by 1) and the amount of water measured by the flow counter (Q) corresponding to the change in the water level, the water level setter (1
An arithmetic circuit (49) that calculates the amount of water required to fill the water up to the set water level in 2), and the required amount of water to be filled by the arithmetic circuit (49) and the bathtub (Q) that the flow rate counter (Q) measures. 2)
The hot water supply amount of the latter is compared, and when the latter hot water supply amount is equal to or more than the former required water filling amount, a flow rate comparator (42) for issuing a water filling stop signal is provided, and the hot water of the flow rate comparator (42) is provided. The tension stop signal keeps the hot water filling valve (10) closed. "

[0016]

[Operation / Effect] The above technical means operates as follows.
When the water level setting device (12) sets the water level and starts the water filling operation (opens the water filling valve (10)), the water level in the bathtub (2) rises due to the start of the water filling operation. .. Then,
The output of the water level sensor (11) that detects the water level in the bathtub (2) and the output of the flow rate counter (Q) that indicates the amount of hot water supply corresponding to the change in the detected water level of the water level sensor (11) are judged, and the bathtub (2) From the relationship between the amount of hot water supplied to the water and the change in the water level (for example, the relationship between the amount of water required to raise the water level in the bathtub (2) to the unit water level)
The calculation circuit (49) calculates the required amount of water filling that needs to be supplied to the bathtub to fill the water level to the set water level.

Next, the required amount of hot water output from the arithmetic circuit (49) and the output of the flow rate counter (Q) for measuring the amount of hot water supplied to the bathtub (2) are continuously compared by the flow rate comparator (42). It When the amount of hot water supplied to the bathtub (2), which is measured by the flow rate counter (Q), is greater than or equal to the amount of water required to fill the water output by the arithmetic circuit (49),
A water filling stop signal is output from the flow rate comparator (42), and the water filling valve (10) is closed by the signal to complete the water filling operation.

Therefore, according to the technical means of claim 3,
The calculation circuit (49) calculates the required amount of water for filling. After the initial stage of the filling operation, only the output of the flow rate counter (Q) can be monitored and filling can be performed. After that, the detected water level of the water level sensor (11) is determined. No need. Therefore, in order to judge the water level detected by the water level sensor (11), it is necessary to repeat the water filling operation and the water filling stop operation until the water filling is completed. ..

[0019]

Embodiments of the present invention described above will now be described with reference to the drawings. As shown in FIG. 4, the bathtub (2) used in this embodiment has a rectangular bottom shape and a longitudinal sectional shape of a trapezoidal section that expands upward. The bathtub (2) and the heat exchanger for reheating (21) are connected by a reheating circuit (22) circulating between the two, and the water level sensor (11) (water pressure) is connected to the reheating circuit (22). It consists of a meter), a circulation pump (P) and a water flow switch (F). Then, the water in the bathtub (2) when the circulation pump (P) is driven flows in the reheating circuit (22) in the counterclockwise direction as shown by the arrow in the figure.

In the reheating circuit (22), the water level sensor (1
A hot water supply circuit (1) drawn from the hot water supply heat exchanger (14) is connected between the hot water supply heat exchanger (14) and the circulation pump (P), and the hot water supply circuit (1) has a hot water filling valve (10). And its backflow prevention device
(15) is inserted. A flow rate counter (Q) is inserted upstream of the hot water supply heat exchanger (14) in the hot water supply circuit (1).

Each component such as the flow rate counter (Q) and the water filling valve (10) is a control device (3) incorporating a microcomputer.
The control device (3) is applied with signals from a water level setting device (12) and an operation switch (13) arranged on the wall surface of the bathroom or the like. This one is designed to perform different operations depending on whether it is the first water filling operation after installing the equipment (hereinafter referred to as the first water filling) or the second or subsequent water filling operation (hereinafter referred to as the normal water filling). At the time of the water filling operation, the size and shape of the bathtub are judged to obtain the basic data necessary for the subsequent water filling operation, and the initial setting operation for storing the basic data is executed. Further, during the second and subsequent normal filling operations, the filling operation is advanced using the basic data obtained in the initial filling operation.

The actual filling operation will be described below with reference to FIG. 5, separately for the initial filling operation and the normal filling operation. A. About the first filling (A). When the power supply is connected after the equipment is installed, the flag (f) used for determining whether it is the first hot-water filling operation is set to "0" (see step (70) in the drawing). (B). Next, watch that the operation switch (13) is turned on,
When this is turned on, the content of the flag (f) is checked, and it is judged whether or not the water filling operation to be executed is the first water filling operation (see the step of the drawing code (71)). When it is determined that the water filling to be performed from now on is the first water filling operation with "0", the hot water supply operation of 10 liters is executed to the bathtub (2) (see step of reference numeral (72)). That is, the hot water supply burner (16) is burned to open the water filling valve (10) to supply hot water to the bathtub (2), and the flow rate counter (Q).
When the output of 1 reaches 10 liters, the hot water supply burner (16) is extinguished and the water filling valve (10) is kept closed. (C). After the operation of supplying 10 liters of hot water to the bathtub (2),
Drive the circulation pump (P) inserted in the reheating circuit (22),
An operation of circulating the water in the bathtub (2) in the reheating circuit (22) is executed (see the step of the reference numeral (73)). (D). Next, check the signal of the water flow switch (F), and if the water flow switch (F) does not output the ON signal, up to the bathtub fitting (24) that connects the side wall of the bathtub (2) and the reheating circuit (22). Circulation pump because it is known that the water level in the bathtub is not rising
(P) is stopped and the operation of supplying 10 liters of hot water to the bathtub (2) is executed again (see steps 74, 75, and 72). Then, when the circulation pump (P) is driven, intermittent hot water is supplied to the bathtub (2) until the water flow switch (F) outputs an ON signal, in which a predetermined amount of hot water of 10 liters per time is supplied.

When the water level in the bathtub (2) rises and the bathtub fitting (24) on the side wall of the bathtub (2) is submerged, the water flow switch (F) outputs an ON signal when the circulation pump (P) is driven. As a result, the air removal in the reheating circuit (22) is completed, and the water level sensor (11) can detect the water level in the bathtub. Therefore, when the step of drawing code (74) for checking the signal of the water flow switch (F) is executed, the control operation is moved to the step of drawing code (76). That is, the circulation pump (P) is stopped and the water level sensor (1
The water level detected by 1) (hereinafter referred to as the first reference water level H0) is stored in a specific first water level memory MH0 in the microcomputer.
In addition, the total amount of hot water supplied to the bathtub (2) measured by the flow counter (Q) from the start of the first filling of water until the first reference water level H0 can be detected (hereinafter referred to as the first reference water amount W0). First
It is stored in the water amount memory MW0. The first standard water amount W
0 is used when executing a normal filling operation to be described later. (E). Next, hot water of 20 liters (hereinafter referred to as the second reference water amount W2) is supplied to the bathtub (2), and the second reference water amount W2 is supplied.
Is stored in the second reference water amount memory MW2. In addition, the water level in the bathtub detected by the water level sensor (11) (hereinafter referred to as the second reference water level H
2) is stored in the second reference water level memory MH2 (see steps (77) and (78) in the drawing). (F). Next, the first amount of insufficient hot water V1 required for checking the shape and size of the bathtub (2) is calculated (see step of reference numeral (79)).

The first insufficient hot water amount V1 is added to the bathtub (2) from the present time to fill the water to the set water level of the water level setting device (12), assuming that the bathtub (2) has a simple rectangular parallelepiped shape. It indicates the amount of hot water that must be obtained, and is calculated as follows. If it is assumed that the bathtub (2) is a simple rectangular parallelepiped, the water level in the bathtub (2) required to raise the water level by a unit water level is WH1, and as is clear from FIG. 4, WH1 = second criterion Water volume W2 / (second standard water level H2-first
Standard water level H0) [1] (However, the second standard water amount W2: 20 liters, the first standard water level H0: The water level sensor (11) when the bathtub fitting (24) is submerged in the water in the bathtub. Detected water level, second reference water level H2: The water level sensor (11) is the next point when the bathtub fitting (24) is submerged and the filling of 20 liters is completed.

Therefore, the first insufficient hot water amount V1 that needs to be added to the bathtub (2) until the set water level of the water level setter (12) is reached.
(Volume of A + B portion in FIG. 4) is the first insufficient hot water amount V1 = A + B = WH1 × (set water level Hs-
The second standard water level H2) becomes [2]. (G). Next, while monitoring the output of the flow rate counter (Q), hot water is replenished and supplied to the bathtub (2) by the first insufficient hot water amount V1 calculated above, and the actual water level in the bathtub (2), that is, the water level sensor ( The detected water level of 11) (hereinafter referred to as the third reference water level H3) is stored in the third reference water level memory MH3 (reference numeral for drawing)
See step (80)). (H). Next, the amount of hot water that must be replenished in the bath in order to raise the water level in the bath (2) to the set water level of the water level setting device (12), that is, the second insufficient hot water amount V2 is calculated.

Since the water level in the bathtub (2) has risen to the third reference water level H3 as a result of the supplementary hot water supply of the above-mentioned first shortage hot water amount V1, the volume of the portion B and the portion of C in FIG. Will have the same volume. That is, assuming that the bathtub (2) is a rectangular parallelepiped, the amount of hot water required to fill the water to the set water level Hs (first insufficient hot water amount V1) is replenished, and as a result, the actual water level in the bathtub up to the third reference water level H3 is reached. Did not rise, so A + B = A + C (see FIG. 4), and as a result, B = C.

However, the horizontal line (dotted line in FIG. 4) indicating the intermediate height between the first reference water level H0 and the second reference water level H2 and the bathtub (2)
Assuming that a line perpendicular to the intersection of the inclined walls K of the above is the first perpendicular J, the above A is the second standard water level H2 and the third standard water level H.
3 is the horizontal line, the vertical wall L of the bathtub (2) on the side where the bathtub fitting (24) is disposed, and the volume of the portion surrounded by the first perpendicular line J. B is the third reference water level H3 and the set water level Hs.
Is the volume of the portion surrounded by the horizontal line and the vertical wall L and the first perpendicular line J, and C is surrounded by the horizontal line indicating the second reference water level H2 and the third reference water level H3 and the first perpendicular line J and the inclined wall K. The volume of the broken part.

Therefore, B = C = unit water amount WH1 × (set water level Hs−third reference water level H3) ... [3] Next, the horizontal line indicating the third reference water level H3 and the inclined wall K of the bathtub (2) Assuming that the horizontal distance between the second perpendicular line M and the first perpendicular line J, which is erected from the intersection point, is WH2, C = approximately (horizontal distance WH2 × h) / 2, and h = third reference water level H3−first reference Considering that the water level is H0, C = about (horizontal distance WH2 × (third reference water level H3−first
Reference water level H0)) / 2 ... [4] Therefore, when the above equation [4] is solved for the horizontal distance WH2, the horizontal distance WH2 = (2 × C) / (third reference water level H3−
The first reference water level H0) becomes [5], and by substituting the expression [3] into "C" in the above expression [5], the horizontal distance WH2 = (2 x unit water volume WH1 x (set water level Hs -Third reference water level H3)) / (Third reference water level H3-First reference water level H0) ... [6].

The horizontal distance WH2 is equal to the first vertical line J and the second vertical line.
It shows the horizontal distance of the vertical line M and the value (horizontal distance WH2 / horizontal water level h) obtained by dividing this by the rising water level h indicates the horizontal direction of the inclined wall K per unit height (for example, vertical distance 1 mm). The increasing distance, that is, the slope of the inclined wall K is shown. Therefore,
When the inside of the bathtub (2) is raised by the unit water level, the water surface in the bathtub is increased in the horizontal direction by (the horizontal distance WH2 / the rising water level h). If this value is taken as the bathtub wall gradient ΔWH, then the bathtub wall gradient ΔWH = (horizontal distance WH 2 / rise water level h)
= (Horizontal distance WH2 / (third reference water level H3-first reference water level H0)).

Next, the third reference water level H3, the set water level Hs,
The volume B of the portion surrounded by the vertical wall L and the first perpendicular line J is B = unit water amount WH1 × (set water level Hs−third reference water level H)
3) ... [7] The volume D of the portion surrounded by the third reference water level H3, the set water level Hs, the first perpendicular J and the second perpendicular M is D = horizontal distance WH2 × (set water level Hs-third 3 standard water level H3) [8] The volume E of the portion surrounded by the third standard water level H3, the set water level Hs, the second perpendicular M and the inclined wall K is E = (tub wall slope ΔWH x (set water level Hs-third reference water level H3) x (set water level Hs-third reference water level H3)) / 2
・ ・ ・ [9]

Therefore, the water level in the bathtub (2) is set to the water level setting device (12).
The second shortage water amount V2 that must be replenished in order to rise to the set water level is the sum of the above B, D and E. From the formulas [7], [8] and [9], the second shortage water amount V2 = B + D + E = (unit water amount WH1 + horizontal distance WH2) × (set water level Hs−third reference water level H3) + (tub wall gradient ΔWH × (set water level Hs−third reference water level H3) × (set water level Hs−) The third standard water level H3)) / 2.

Then, in the step indicated by reference numeral (81) in FIG. 5, the calculation for obtaining the second insufficient water amount V2 is performed.
In the first filling operation, the first shortage water amount V1
The functional unit in the microcomputer for calculating the second water shortage amount V2 based on the above equation corresponds to the arithmetic circuit (49). (I). Next, after supplying the above-mentioned second shortage water amount V2 of warm water to the bathtub (2), the value of the flag (f) is set to "1" to record the completion of the first filling operation, and the operation is performed again. The control operation is returned to the step of monitoring the operation of the switch (13) (see the steps (82) and (71)).

This completes the initial filling operation. B. Regarding normal filling of water When the operation switch (13) is operated after the above-mentioned initial filling of water after the installation of the equipment, a quick filling of water using the second insufficient water amount V2 or the like is executed. Next, the details of the normal filling operation will be described depending on the presence or absence of residual water in the bathtub (2). (I). When there is no residual water in the bath (2) (A). When the operation switch (13) is turned on, the content of the flag (f) is judged. Then, since the content of the flag (f) has already been set to "1" when the above-mentioned initial filling is executed, the control operation is moved to the process shown at the right end of the figure, and the circulation pump is first. Drive (P) (drawing number (71),
See step (85)). (B). Next, judge the output of the water flow switch (F) (drawing code
(Refer to step (86)), and when the water flow switch (F) outputs an OFF signal, stop the circulation pump (P) (see step of drawing code (87)), and then to the bathtub fitting (24). The amount of hot water (hereinafter referred to as the first hot water filling amount X1) that needs to be supplied to the bathtub (2) until the water level rises to a position 50 mm above (1) is calculated (see the step of the reference numeral (88)).

As shown in FIG. 6, the bottom wall of the bathtub (2) and the first wall
The volume between the reference water levels H0 is the first reference water amount W0 which is obtained by the above-described initial filling and stored in the first water amount memory MW0.
Is. Further, the first standard water level H0 and a horizontal line 50 mm above it (hereinafter referred to as the fourth standard water level H4), the vertical wall L of the bathtub (2) and the first perpendicular line J (the significance of the first perpendicular line J is for the first filling). The volume of the range X5 surrounded by (explained) is "X
5 = unit water amount WH1 × 50 mm ”.

Further, the first reference water level H0 and 50 mm above it
The volume of the portion X6 surrounded by the fourth reference water level H4, the first vertical line J, and the inclined wall K is "X6 = bathtub wall gradient ΔWH ×
(50 × 50) / 2 ”. Therefore, it can be seen that the first amount of water X1 required to fill up to the water level of 50 mm above the bathtub fitting (24) can be obtained by adding the above respective amounts of water.

Therefore, the first filling amount X1 = first reference water amount W0 + X5 + X6 = ((tub wall gradient ΔWH × 50/2) + unit water amount WH1
) × 50 + first reference water amount W0, and thus the first amount of water filling X1 required to fill up to 50 mm above the bathtub fitting (24) is obtained. (C) Next, burn the hot water supply burner (16) and open the hot water filling valve (10), and while judging the output of the flow rate counter (Q), the hot water of the first hot water filling amount X1 is determined. To the bathtub (2) (see step (89)). (D). Next, the current bathtub detected by the water level sensor (11)
(2) The internal water level (fourth reference water level H4) is stored in the fourth reference water level memory MH4, the flow rate counter (Q) is reset, and the set water level Hs of the water level setter (12) is changed to the water level setting memory MHs. (Refer to the step of drawing code (90)). (E). Burn the hot water supply burner (16) and fill the water filling valve (1
0) is opened and the filling operation is restarted (see step (91)). (F). Next, the second filling amount X2 that needs to be replenished in order to raise the water level in the bathtub (2) to the set water level Hs stored in the water level setting memory MHs is calculated (see step of reference numeral (92)).

A third perpendicular N established from the intersection of the water level (fourth reference water level H4) 50 mm above the first reference water level H0 and the inclined wall K, and the height difference h between the fourth reference water level H4 and the set water level Hs. 5th standard water level H5 showing the water level of "h / 2" which is half of
The first horizontal distance d is the horizontal distance from the point where the intersects the inclined wall K. When the horizontal distance between the first perpendicular J and the third perpendicular N is the second horizontal distance e, the first horizontal distance d = ((set water level Hs-fourth reference water level H4
) / 2) × tub wall gradient ΔWH Second horizontal distance e = about (4th reference water level H 4 −first reference water level H 0) × tub wall inclination ΔWH, and the auxiliary value G obtained by adding these two values is auxiliary value G = First horizontal distance d + second horizontal distance e = about (((set water level Hs−fourth reference water level H4) / 2) + (fourth reference water level H4−first reference water level H0)) × tub wall gradient Δ
WH ... [10]

Then, the auxiliary value G is equal to the set water level H.
s and the fifth standard water level H, which is an intermediate water level between the fourth standard water level H4 and
5 indicates the horizontal distance from the intersection r intersecting the inclined wall K to the first perpendicular J measured, and the auxiliary value G is about the upper side of the triangle surrounded by the inclined wall K, the set water level Hs and the first perpendicular J. It's halved. Therefore, the volume of the triangular portion is approximately "(set water level Hs-fourth reference water level H4) x auxiliary value G".

Further, the portion surrounded by the fourth reference water level H4, the set water level Hs, the vertical wall L, and the first perpendicular line J (a portion of the remaining necessary amount of water filling, excluding the triangular portion) is filled with water. The volume of water is "(set water level Hs-fourth reference water level H4) x unit water volume WH1". Therefore, after that bathtub
The second amount of water filling X2 required to fill the inside of (2) up to the set water level Hs of the water level setting device (12) is the amount of hot water to be filled in the triangular portion and other than the triangle. The amount is the amount of hot water that will be filled with water. That is, the second amount of water filling X2 = (set water level Hs-fourth reference water level H4
) × (unit water amount WH1 + auxiliary value G) ... [11] As a result, the second filling amount X2, which must be replenished in the bathtub (2) thereafter, is obtained.

In this embodiment, the memory unit in the microcomputer for storing the value of "unit water amount WH1 + auxiliary value G" is the unit water amount setting device (technical means of the first and second claims). Corresponding to 4), the "unit water volume WH1 + auxiliary value G" and the above "set water level H" as the required water level for filling water thereafter.
s-fourth reference water level H4 ", the functional unit in the microcomputer is a multiplication circuit according to the technical means of claims 1 and 2.
Corresponds to (41). Further, the functional unit in the microcomputer for calculating the "set water level Hs-fourth reference water level H4" corresponds to the insufficient water level calculator (44) described in the technical means of claim 2.

Further, in the normal filling operation, the functional unit in the microcomputer for calculating the second filling amount X2 based on the result of the filling operation of the first filling amount X1 is the technical means of claim 3. It corresponds to the arithmetic circuit (49) described in the section. (G). Next, during hot water replenishment currently being executed, it is determined whether or not the set water level is changed by comparing the output of the water level setter (12) with the value of the set water level Hs stored in the water level setting memory MHs. However, if the set water level is changed, the set water level of the water level setter (12) after the change is stored again in the water level setting memory MHs, and then the second hot water filling is performed again. Volume X2 (The water level in the bathtub (2) is set to the fourth standard water level H4
To the set water level Hs after the change from (to the amount of supplementary water required) is calculated (refer to steps (93), (94) and (92) in the drawing). As a result, it is possible to accept changes in the set water level during the filling process. (H). Next, the output of the flow rate counter (Q) which measures the hot water supply amount after the hot water of the second hot water filling amount X2 calculated above is started to be supplied to the bathtub (2) is compared with the second hot water filling amount X2. (Refer to the step of drawing code (95)) If the former becomes large, that is, if the filling operation is completed, the hot water supply burner
(16) is extinguished, and the water filling valve (10) is closed to complete the water filling operation (see step of reference numeral (96)). (B). When there is residual water in the bathtub (2) Normally, when water filling switch is started and the step of drawing code (86) for checking the signal of the water flow switch (F) is executed, the water flow switch (F) turns on. It is known that there is residual water in the bathtub (2) while the
Without stopping (refer to the step of drawing code (97)) and performing the operation of filling up to the fourth standard water level H4,
At that time, the step of drawing code (90) for storing the water level in the bathtub (2) detected by the water level sensor (11) in the fourth reference water level memory MH4 is executed. That is, the residual water is
When present in (2), the water level in the bathtub (2) is filled with water in the bathtub from the location of the water level sensor (11), and no air is accumulated in the flowpath. Sensor (11) is bathtub
(2) The internal water level is properly detected, and the filling of water up to the fourth reference water level H4, which is performed for the purpose of removing air from the flow path, is not performed.

Thereafter, in the same manner as when the residual water does not exist in the bathtub (2), the operation for calculating the second amount of water filling X2 is performed to reach the set water level of the water level setting device (12). 2) Add warm water to the inside. And, in this embodiment, reference numeral 92
The difference between the fourth reference water level H4 and the set water level Hs is
It has already been described that the functional unit in the microcomputer for calculating "reference water level H4 -set water level Hs" corresponds to the insufficient water level calculator (44) described in the technical means of claim 2.

Although the bathtub fitting (24) is provided on the side wall of the bathtub (2) in the above embodiment, the bathtub fitting (24) may be provided on the bottom wall of the bathtub (2). In this case, it is not necessary to temporarily raise the water level in the bathtub (2) to the fourth standard water level H4 at the beginning of normal water filling. This is because the flow path connecting the water level sensor (11) to the bottom wall of the bathtub (2) is usually filled with water. If there is a possibility that the flow path connecting the water level sensor (11) to the bottom wall of the bathtub (2) is not filled with water, the hot water is supplied to the bathtub (2) for a certain short period at the beginning of the filling operation. The circuit connecting the water level sensor (11) to the bottom wall of the bath (2) may be deflated. In such a case, after the hot water is supplied to the bathtub (2) for a certain short time, the detected water level of the water level sensor (11) is stored in the fourth reference water level memory MH4 and the operation following the step of the reference numeral (90) is executed. You can do it. This allows
It becomes unnecessary to execute the steps of drawing symbols (88) and (89) for obtaining the first amount of hot water filling X1 and supplying that amount of hot water into the bathtub (2).

Further, in the above embodiment, the case of filling the bathtub (2) having an upward spread shape with water is described, but when filling the bathtub (2) having a simple rectangular parallelepiped shape, the water level setting device (1
Multiply the set water level in 2) and the bottom area of the bathtub (2) or use the difference between the remaining water level and the water level setter (12)
The amount of water required for filling the water can be determined by multiplying the bottom area in (2). In such a case, the above bathtub (2)
The value obtained by multiplying the bottom area of the product by a unit water level (for example, 1 mm) becomes the unit amount of water described in the section of technical means, and the memory in the microcomputer that stores the amount of water is described in the section of technical means. Corresponds to the unit water volume setter (4). [Other methods for obtaining the relationship between the filling water level and the filling amount] Next, the filling water level for the trapezoidal bathtub (2) shown in FIG. Another example of how to obtain the relationship of the amount of water (volume) is shown.

As shown in FIG. 7, the bottom wall of the bathtub (2) is aligned with the horizontal axis (X axis) of the two-dimensional coordinate system, and
When the vertical wall L is aligned with the vertical axis (H axis), H represents the water level filled with water. When the linear expression X representing the inclined wall K is represented by a function of the water level H filled with water, X = a × H + b ... [12]

The first standard water amount W0 required to fill the water until the water level in the bathtub rises to the first standard water level H0 is

[Equation 1] ・ ・ ・ [13] In the above formula [13], "R" is a constant representing the bath width (the bath width in the direction perpendicular to the paper surface of FIG. 7). When R × a = A and R × b = B in the above equation [13], the above equation
[13] is

[Equation 2] [14] is obtained, and if the parameters “A” and “B” are obtained, the relationship between the water level and the amount of water filling can be clarified, and the above parameters are obtained below. The first reference water level H0 and the first reference water amount W0 are the water level sensor (11) and the flow rate counter (Q) when the water flow switch (F) is in the ON state by the intermittent water filling operation every 10 liters at the time of the first water filling. ) Output.

Therefore, when the above equation [14] is solved for "B", B = (first reference water amount W0 / first reference water level H0)-(A *
The first standard water level H0) / 2 ... [15]. After the water level in the bathtub (2) has reached the first reference water level H0 and 20 liters of hot water has been replenished, the bathtub
Total hot water supply to (2) (first standard water amount W0 + 20 liters)
When the relationship between the water level H20 and the water level H20 at that time is obtained in the same manner as the above equation [14], the following is obtained.

[0048]

[Equation 3] ... [16] Substituting equation [15] into [16],

[Equation 4] ・ ・ ・ [17] Therefore, if the parameter A is calculated from the equation [17],

[0049]

[Equation 5] ... [18] Substituting equation [18] into equation [15] and obtaining parameter B,

[Equation 6] ・ ・ ・ [19] By substituting the equations [19] and [18] into the equation “X = A × H + B” and integrating this from the arbitrary water level Hz to the set water level Hs, the water amount W required to fill the water in this range can be obtained. .. That is, the value of W is

[Equation 7] ... [20] In particular, when there is no residual water, the amount of hot water that needs to be supplied to the bathtub (2) to fill the water to the set water level Hs is

[Equation 8] ・ ・ ・ [21] Therefore, based on the equations [20] and [21], the water level and the required water volume corresponding to it are calculated by the microcomputer of the control device (3), and the water level set by the water level setting device (12) is calculated. The required hot water supply amount is calculated, and this enables the hot water filling operation in accordance with the output of the flow rate counter (Q).

Then, when the set water level of the water level setting device (12) is changed in the course of filling the water, the necessary water amount is recalculated based on the equations [20] and [21], and the necessary water amount after the change is calculated. It is sufficient to compare the amount of hot water supplied to the bathtub (2) by the output of the flow rate counter (Q) and stop the filling operation.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the invention of claim 1.

FIG. 2 is a conceptual diagram of the invention of claim 2;

FIG. 3 is a conceptual diagram of the invention of claim 3;

FIG. 4 is a configuration diagram of an embodiment of the present invention.

FIG. 5 is a flowchart showing the control operation of the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing the relationship between the water level set for normal filling and the required hot water supply amount during normal filling.

FIG. 7 is an explanatory diagram showing another example of calculation for calculating the water level filled with water and the necessary water amount corresponding to it.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 (1) ・ ・ ・ Hot water supply circuit (2) ・ ・ ・ Bathtub (4) ・ ・ ・ Unit water amount setting device (10) ・ ・ ・ Water filling valve (11) ・ ・ ・ Water level sensor (12) ・ ・ ・ Water level setting Unit (41) ・ ・ ・ Multiplication circuit (42) ・ ・ ・ Flow rate comparator (44) ・ ・ ・ Underwater level calculator (49) ・ ・ ・ Calculator circuit

Claims (3)

[Claims] 1. A hot water supply circuit (1) connected to a bath (2), a flow rate counter (Q) and a water filling valve inserted in the hot water supply circuit (1).
(10) and further comprises a water level setting device (12) for setting the water level for filling the bathtub (2), and hot water is supplied to the bathtub (2) up to the water level set by the water level setting device (12). In the water filling device so configured, a unit water volume setting device (4) for setting the unit water volume necessary to raise the water level in the bathtub (2) by the unit water level,
A multiplication circuit that calculates the product of the set water amount of the unit water amount setting device (4) and the set water amount of the water level setting device (12) to obtain the required water filling amount
(41) is compared with the amount of water required to fill the water output by the multiplication circuit (41) and the amount of hot water supplied to the bathtub (2) measured by the flow rate counter (Q), and the amount of hot water supplied to the latter is the amount of water required to fill the former. A flow rate comparator (42) that outputs a filling stop signal when the above is reached is provided, and the filling valve (10) is maintained in the closed state by the filling stop signal of the flow rate comparator (42). Hot water filling device. 2. A hot water supply circuit (1) connected to a bathtub (2), a flow rate counter (Q) and a water filling valve inserted in the hot water supply circuit (1).
(10) and further comprises a water level setting device (12) for setting the water level for filling the bathtub (2), and hot water is supplied to the bathtub (2) up to the water level set by the water level setting device (12). In the water filling device, the water level sensor is activated when the operation switch (13) is turned on.
A water shortage calculator (44) for calculating the water shortage by calculating the difference between the water level in the bathtub (2) detected by (11) and the water level set in the water level setter (12), and the water shortage calculator (44) 44) Multiply the product of the above-mentioned insufficient water level and the output of the unit water volume setting device (4) that stores the unit water volume required to raise the unit water level in the bathtub (2) to obtain the required water filling amount. Circuit (41), required amount of water filling and flow rate counter (Q) output from the multiplication circuit (41)
The amount of hot water supplied to the bathtub (2) measured by is compared, and when the amount of hot water supplied to the latter exceeds the amount required to fill the water in the former, a flow rate comparator (42) that issues a signal to stop filling the water is provided. A water filling device configured to maintain the water filling valve (10) in a closed state by the water filling stop signal of the container (42). 3. A hot water supply circuit (1) connected to a bath (2), a flow rate counter (Q) and a water filling valve inserted in the hot water supply circuit (1).
(10), a water level sensor (11) for detecting the water level in the bathtub, and a water level setting device (12) for further setting the water level of the bathtub (2), which is set by the water level setting device (12) Bathtub up to the water level
(2) In a water filling device that supplies hot water to the inside, changes in the water level in the bathtub detected by the water level sensor (11) at the initial stage of the water filling operation, and the amount of water measured by the flow counter (Q) corresponding to the change in the water level. Calculation circuit (49) that calculates the amount of water required to fill up to the set water level of the water level setting device (12) based on
And the amount of water needed to fill the water output from the arithmetic circuit (49) and the amount of hot water supplied to the bathtub (2) measured by the flow rate counter (Q) are compared, and the amount of hot water supplied to the latter exceeds the amount of water needed to fill the water in the former. A water flow comparator (42) that outputs a water filling stop signal when the water filling operation is performed, and the water filling valve (10) is kept closed by the water filling stop signal of the flow rate comparator (42). apparatus.