JP2000337698A - Automatic hot water filling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic hot water filling device which can fill a bathtub with hot water to such a water level as to suit a user's will regardless of the difference in the depth of the bathtub. SOLUTION: An overflow water level grasping means 30 supplies hot water to a bathtub 8 while detecting the water level of the bathtub 8 by a water level sensor 25, and grasps the detected water level at the time when the rise of the detected water level of the water level sensor 25 stops as an overflow water level which is the water level at which hot water overflows the bathtub 8. An upper limit water level determining means 31 determines the upper limit in the set range of the target filled hot water revel in the bathtub 8 by a hot water level setting switch 45 on be basis of the afore-said overflow water level. A filled hot water level pointer 56 indicates the lower limit in the water level set range by the hot water level setting switch 45 as a minimum level and the upper limit as a maximum level about the target hot water level which is set by the hot water level setting switch 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic filling system for filling a bathtub to a predetermined target water level.

[0002]

2. Description of the Related Art Conventionally, a filling water level setting switch for setting a filling water level of a bathtub by a user and a filling water level set by the filling water level setting switch (hereinafter referred to as a target filling water level). 2. Description of the Related Art There is known an automatic filling apparatus which includes a level indicator for displaying a level and supplies hot water to a bathtub until the target filling water level is reached to fill the bath.

[0003] In the conventional automatic filling system, the range of the filling water level which can be set by the filling water level setting switch (hereinafter referred to as a water level setting range) is assumed to be a standard bathtub depth. The upper limit is set to a water level that is higher than a predetermined reference water level (for example, near an upper part of a hot water supply port provided at a lower part of the side surface of the bathtub) by a certain amount.

The level indicator displays a maximum level when the target filling level is set at an upper limit of the water level setting range, and the target filling level is set at a lower limit of the water level setting range. Was configured to show the minimum level when Then, when the user sets the target filling level by operating the filling level setting switch while referring to the level indicator configured in this way, the user is required to actually set the bathtub. It is considered that the water level is grasped in correspondence with the level of the level indicator.

[0005] That is, if the level indicator displays the maximum level, the user knows that the target filling water level is set near a water level at which the bathtub becomes full (hereinafter referred to as an overflow water level). However, it is considered that as the display level of the level indicator decreases, the target filling level gradually decreases from the overflow level.

On the other hand, as described above, in the conventional automatic hot water filling apparatus, the upper limit of the water level setting range is determined assuming a standard bathtub depth. And
Since the actual depth of the bathtub varies, the relationship between the upper limit of the water level setting range and the overflow water level differs depending on the depth of the bathtub. For this reason, the filling water level intended by the user does not match the actual filling water level by the automatic filling, and the filling may be performed at a water level contrary to the user's will.

[0007] For example, when the overflow water level is lower than the upper limit of the water level setting range, the user attempts to fill the bathtub with water, and sets the target hot water level to the upper limit of the water level setting range. Is set, the target filling water level becomes higher than the overflow water level. Therefore, when the hot water is filled, even if the water level in the bathtub reaches the overflow water level, hot water supply to the bathtub is continued, and there is a disadvantage that the hot water overflowing from the bathtub is wasted.

On the other hand, when the overflow water level is higher than the upper limit of the water level setting range, the user attempts to fill the bathtub with water, and sets the target hot water level to the upper limit of the water level setting range. When set, the target filling water level becomes lower than the overflow water level. Therefore, when the filling is performed, the filling is terminated before the filling water level reaches the overflow water level, and the filling is not performed to the water level intended by the user (the filling water level is insufficient). There was an inconvenience.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages and to provide an automatic hot water filling apparatus capable of performing water filling at a water level according to a user's wishes regardless of a difference in bathtub depth. The purpose is to provide.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and includes a hot water supply means for supplying hot water to a bathtub, a water level sensor for detecting a water level in the bathtub, and a user operation. In response to the above, a filling level setting means for setting a target filling level, which is a target value of the filling level of the bathtub, within a predetermined setting level, and a target filling level set by the filling level setting means. A filling level display means for displaying a level as a lower limit of the water level setting range as a minimum level and an upper limit of the water level setting range as a maximum level; and controlling the amount of hot water supplied to the bathtub by the hot water supply means to control the target filling level. The present invention relates to an improvement of an automatic filling system provided with filling control means for performing filling.

The hot water supply means supplies hot water to the bath tub while detecting the water level in the bath tub with the water level sensor, and detects the detected water level as the overflow water level when the rise in the water level detected by the water level sensor stops. Means, and an upper limit water level determining means for determining an upper limit of the water level setting range based on the overflow water level.

According to the present invention, the actual depth of the bathtub is grasped as the overflow water level by the overflow water level grasping means. Then, the upper limit water level determining means determines an upper limit of the water level setting range based on the overflow water level. Thus, by setting the upper limit of the water level setting range based on the overflow water level, the upper limit of the water level setting range can be set according to the depth of the bathtub. Therefore, it is possible to make the display of the hot water level display means and the water level setting range correspond to the user's intention. Also, by setting the upper limit of the water level setting range to a height lower than the overflow water level, it is possible to prevent hot water from overflowing from the bathtub during filling.

A flow rate sensor for detecting a flow rate of hot water supplied from the hot water supply means to the bathtub; a hot water supply amount accumulating means for calculating a cumulative hot water supply amount to the bathtub from a detection value of the flow rate sensor; From the start, the upper limit hot water supply amount, which is the cumulative hot water supply amount until the water level detected by the water level sensor reaches the upper limit of the water level setting range, is calculated by the hot water supply amount accumulating means. And a hot water supply amount calculating means for calculating a target hot water supply amount which is a required hot water amount for performing the hot water filling of the target hot water level based on the hot water supply means. The hot water supply to the bathtub is started and the calculation of the cumulative hot water supply amount by the hot water supply amount accumulating means is started, and the hot water is supplied to the bathtub until the cumulative hot water supply amount reaches the target hot water supply amount. We run hot water It is characterized in.

As the water level sensor, a static pressure type pressure sensor or a float type sensor provided in a hot water supply path from the hot water supply means to the bathtub is generally used. The water level cannot be accurately detected unless the flow of hot water stops and is not in a stable state.

[0015] Therefore, when filling with hot water while checking the water level in the bathtub with a water level sensor, the hot water supply to the bathtub must be interrupted many times during filling, and the water level must be detected. The time gets longer. The accuracy and durability of the water level sensor are inferior to those of the flow sensor. Therefore, in the present invention, the hot water supply amount calculating means calculates the target hot water supply amount, which is the hot water supply amount necessary to fill the target hot water level based on the upper limit hot water supply amount. calculate. The hot water supply control means performs hot water supply by supplying hot water to the bathtub by the hot water supply means until the cumulative hot water supply amount by the hot water supply amount accumulating means reaches the target hot water supply hot water supply amount.

This eliminates the need to interrupt the filling and to detect the water level in the bathtub with the water level sensor.
The time required for hot water filling can be reduced. And
By performing filling using a flow rate sensor having higher accuracy than the water level sensor, the accuracy of the filling level can be improved.

In the case where the filling level is controlled by the flow rate sensor as described above, the water level sensor is required only when grasping the overflow water level when installing the automatic filling apparatus. is there. Therefore, when the use time of the water level sensor is limited as described above, the water level sensor is made detachable, and the water level sensor is attached and used only when necessary, thereby reducing the cost of the automatic hot water filling device. Can be.

[0018]

FIG. 1 shows an example of an embodiment of the present invention.
This will be described with reference to FIGS. 1 is an overall configuration diagram of the automatic hot water filling device of the present invention, FIG. 2 is a configuration diagram of the remote controller shown in FIG. 1, and FIGS. 3 to 5 are flowcharts showing processing for determining a setting range of the hot water level. 6 is an explanatory diagram of the hot water level of the bathtub.

Referring to FIG. 1, the automatic hot water filling apparatus of the present embodiment includes hot water supply means 1 and additional heating means 2, and controls operation of hot water supply means 1 and additional heating means 2 by controller 3. It has a configuration.

The hot water supply means 1 is provided with a water supply pipe 5 penetrating through a hot water supply heat exchanger 4 (heated by a gas burner not shown), and supplies water supplied from a water supply pipe (not shown) to the water supply pipe 5. The water is heated by the exchanger 4 and discharged. The downstream end of the water pipe 5 is used for a common water pipe 6 connected to a hot water tap (not shown) in a kitchen or a lavatory, and a bathtub connected to a circulation path 14 for circulating hot water in the bathtub 8. It branches to the water pipe 7. This allows hot water to be supplied to the kitchen or the like from the water pipe 5 via the regular water pipe 6 and also allows hot water to be supplied from the water pipe 5 to the bathtub 8 via the bathtub water pipe 7.

An inlet water temperature thermistor 10 and an inlet water flow sensor 11 are provided at an upstream portion of the water pipe 5, and a water amount servo 12 and a tap water temperature thermistor 13 for controlling a hot water supply flow are provided at a downstream portion. Is provided.

The bathtub water pipe 7 is provided with an electromagnetic valve 1 from the upstream side.
5. A filling water flow sensor 16 (corresponding to the flow sensor of the present invention), a hopper 17, a check valve 18, and a three-way valve 19 are provided in this order, and are connected to the circulation path 14. The hot water filling flow sensor 16 outputs a signal corresponding to the flow rate of hot water flowing through the bathtub water pipe 7.

The supplementary heating means 2 comprises a circulation path 14, a bath pump 20, and a supplementary heat exchanger 21. The circulation path 14 connects the three-way valve 19 to the bath pump 20 and the supplementary heat exchanger 21. An outgoing path 14a that leads to the bathtub 8 via an outlet and a return path 14b that directly leads from the three-way valve 19 to the bathtub 8 are provided. ing.

A water flow switch 23 for detecting the presence or absence of a water flow in the circulation path 14 and a bath tub temperature thermistor 24 are provided in the middle of the forward path 14a, and a water level in the bath tub 8 is provided in a middle of the return path 14b. Is provided with a water level sensor 25 for detecting via the. The water level sensor 25 is configured by a pressure sensor that detects a water level of hot water applied to the bathtub 8 as a hydrostatic pressure corresponding to the water level, and the water level of the hot water applied to the bathtub 8 detects the hot water supply port 22. When it exceeds, a detection signal corresponding to the water level is output.

In the automatic hot water filling apparatus constituted by the hot water supply means 1 and the additional water heating means 2 as described above, the hot water in the bathtub 8 is opened by opening the solenoid valve 15 and flowing from the water pipe 5 of the hot water supply means 1 to the bathtub. This is performed by supplying hot water to the bathtub 8 through the water pipe 7 and the circulation path 14. In this case, the bathtub water pipe 7
From the three-way valve 19, the hot water flows into the circulation path 14 through the three-way valve 19 and reaches the bath 8 through both the outward path 14 a and the return path 14 b of the circulation path 14 (so-called double conveyance).

When performing additional heating for heating the hot and cold water stored in the bathtub 8, the bath pump 20 is operated with the solenoid valve 15 closed and the hot water in the bathtub 8 is removed from the circulation path 14. Circulate through. At this time, the hot water in the bathtub 8 is heated by burning the additional heat exchanger 21 (heated by a gas burner not shown).

Next, the controller 3 includes a CPU, RA
An electronic unit including an M, a ROM, and the like, and includes an incoming water temperature thermistor 10, an incoming water flow rate sensor 11, an outgoing water temperature thermistor 13, a hot water filling flow sensor 16, and a water flow switch 2.
3. Connected to the bath temperature thermistor 24 and the water level sensor 25, and input various detection signals output from these. The controller 3 is connected to a remote controller 40,
Operation instruction data, hot water supply temperature instruction data, and the like from the remote controller 40 are input to the controller 3.

Referring to FIG. 2, remote controller 40 includes a switch section 41 for instructing the operation of hot water supply means 1 and additional heating means 2 by a user's operation, an operating state of hot water supply means 1 and additional heating means 2, and the like. Is displayed on the display unit 42. The switch section 41 includes an operation switch 43 for switching the hot water supply means 1 and the additional heating means 2 between an operation standby state and a stop state, and a hot water temperature setting switch 44 for setting a hot water supply temperature to the service water pipe 6 (see FIG. 1). A filling level setting switch 45 (corresponding to the filling level setting means of the present invention) for setting the filling level for the bath 8 (see FIG. 1), and setting the filling temperature for setting the filling level for the bath 8 Switch 46, refire switch 4 for instructing execution of reheat of hot water stored in bathtub 8
7, and an automatic filling switch for instructing execution of filling up to the filling level (target filling level) set by the filling level setting switch 45 at the temperature set by the filling level setting switch 46. 48.

The display section 42 of the remote controller 40 has a hot water supply combustion display section 50 which is turned on while a burner (not shown) of the hot water supply means 1 is burning, and a burner (not shown) of the additional heating means 2.
During the operation of the additional heating combustion display section 51 which is turned on during the combustion of the hot water, the hot water supply temperature display section 52 for displaying the set value of the hot water supply temperature changed by operating the hot water supply temperature setting switch 44, and the hot water level setting switch 45, the target hot water is displayed. The hot water supply amount, which is the hot water supply amount according to the filling water level (the amount of hot water required to fill up to the target filling water level), is displayed in three digits (the least significant digit display section 54 is lit to "0"). During the operation of the filling temperature setting switch 46, the filling temperature is displayed in two digits (the least significant digit display portion 54 is turned off), and the filling temperature display section 53 and the filling level setting means 45 are used. A level pointer 56 indicating the level of the set target filling level in a water level scale 55.
(The water level scale 55 and the level pointer 56 constitute the filling level display means of the present invention).

In this embodiment, the filling level setting switch 45 sets the target filling level in 12 steps. Therefore, the water level scale 55 is divided into 12 stages (h ₁ , h ₂ ,..., H ₁₂ ), and the level pointer 56 moves to a scale position corresponding to the setting of the target filling level.

Next, the operation of the overflow water level grasping means 30, the upper limit water level determining means 31, the hot water supply water supply amount calculating means 32, and the hot water supply accumulating means 34 provided in the controller 3 will be described.
This will be described with reference to the flowcharts shown in FIGS.
3 to 5 are flowcharts showing a test run process performed when the automatic filling device shown in FIG. 1 is installed, and the target filling set by the fill level setting switch 45 by the test run. The water level range (water level setting range) is determined.

Referring to FIG. 3, in step 1, when the user (installer of the apparatus) turns on the operation switch 43 while turning on the automatic switch 48 of the remote controller 40 (for instructing execution of the test run). (Special operation), the remote controller 40 instructs the controller 3 to execute a test run in STEP 2 and below.

The test operation is mainly performed by the overflow water level grasping means 30.
And the overflow water level grasping means 30
At 2, the solenoid valve 15 is opened to fill the bathtub with the water pipe 7 (see FIG. 1) and the bath pump 20 with water, and from the water pipe 5 (see FIG. 1) to the bathtub 8 via the circulation path 14. Supply 5 liters of hot water.

Since the test operation is performed to determine the range of the target hot water level, water may be supplied from the hot water supply means 1 to the bathtub 8 instead of hot water. That is, the test operation may be performed in a state where the combustion of the burner for heating the hot water supply heat exchanger 4 is stopped. In this case, the test operation can be performed even before the supply of the fuel gas to the hot water supply unit 1 becomes possible.

The hot water supply flow rate to the bathtub 8 is detected by the hot water flow sensor 16, and the hot water supply amount accumulating means 34 provided in the controller 3 supplies the hot water supply amount to the bathtub 8 based on the detected flow rate of the hot water flow sensor 16 and the hot water supply time. Calculate the cumulative hot water supply. The overflow water level grasping means 30 supplies hot water to the bathtub 8 by executing hot water supply while checking the accumulated hot water supply amount to the bathtub calculated by the hot water supply accumulating means 34.

Next, the overflow water level grasping means 30 is operated in STEP.
In step 3, the bath pump 20 is operated. At this time, referring to FIG. 1, when hot water is spread to the upper portion of hot water supply port 22 of bathtub 8, hot water circulates in circulation path 14, so that circulation path 1
The water flow switch 23 provided in 4 is turned on. on the other hand,
When the hot water is not filled up to the upper part of the hot water supply port 22 of the bathtub 8, the hot water does not circulate in the circulation path 14 even when the bath pump 20 is operated, and the water flow switch 23 is turned off.

For this reason, when the bath pump 20 is operated, the overflow water level grasping means 30 turns off the water flow switch 23.
By detecting whether or not to perform hot water, the hot water supply port 2 of the bathtub 8 is detected.
It can be recognized whether or not the hot water is covered up to the upper part of 2.

When the water flow switch 23 is ON in STEP 4, that is, when it is recognized that the hot water is supplied to the upper part of the hot water supply port 22 even though only 5 liters of hot water is supplied to the bathtub 8. Can be determined to have already been supplied to the bathtub to some extent at the start of the test run.
In this case, since the accumulated hot water supply amount V ₀ required until reaching the reference water level H ₀ detected in STEP 12 to be described later cannot be detected, the overflow water level grasping means 30 determines in STEP 4
Then, the operation branches to STEP40 to stop the operation of the bath pump 20, and the execution of the test operation is stopped in STEP41 (NG stop).

On the other hand, in step 4, the water flow switch 23
If it is FF, it can be determined that there is no hot water in the bathtub 8 at the start of the test run, so the overflow water level grasping means 30 continues the test run, proceeds to STEP 5 and stops the operation of the bath pump 20. In the following STEP6, hot water supply amount accumulating means 35
Starts accumulating the amount of hot water supplied to the bathtub 8, and the overflow water level grasping means 30 supplies 50 liters of hot water in STEP7.

Then, thereafter, the overflow water level grasping means 30 repeats STEP8, STEP9, STEP4 until it is detected that the water flow switch 23 is turned ON in STEP9.
5. The loop consisting of STEP 46 is repeatedly executed.
That is, 10 liters of water are supplied to the bathtub 8 in STEP 46, and it is detected in STEP 9 whether or not the water flow switch 23 is turned ON.

When the water flow switch 23 is turned ON in STEP 9, the overflow water level grasping means 30
Proceed to 10 to stop the operation of bath pump 20, and then to ST
In order to ensure that the water level in the bathtub 8 exceeds the hot water supply port 22 in EP11, an additional 20 liters of hot water is supplied to the bathtub 8,
In STEP 12, the water level detected by the water level sensor 25 after the hot water supply is held as the reference water level H ₀ (see FIG. 6). The next STEP 13 is processing by the hot water supply amount calculating means 32, and the hot water supply amount calculating means 32 holds the accumulated hot water supply amount by the hot water supply amount accumulating means 34 as V ₀ (see FIG. 6).

Subsequently, the overflow water level grasping means 30 is provided with the STE
And 50 liters hot water in the bathtub 8 P14, for holding the detected water level of the water level sensor 25 after the hot water supply as S ₅ at STEP 15. Then, when the S ₅ is equal to the reference water level H ₀ in STEP 16, that is, prior to 50 liters hot water in STEP 14, when already can be determined that the water had overflowed from the bath 8, with reference to FIG. 6, the hot water supply port 22 Is high, the reference water level H ₀ and the overflow water level H _F, which is the water level at which the hot water overflows from the bathtub 8.
(= S ₅ ) can be assumed to be small.

In this case, the reference water level H ₀ and the overflow water level H
_It is impossible to determine the setting range of the target filling water level by the filling water level setting switch 45 with _F. Further, in a normal bath size and installation conditions of difficult thus considered a difference between the reference water level H ₀ and overflow water level H _F is in the small state, possibly the water level sensor 25 is faulty high. For this reason, the overflow water level grasping means 30 is provided in STEP
The process branches to step 50 to stop the test run (NG stop).

[0044] On the other hand, the reference water level H ₀ is S ₅ in STEP16
If (S ₅ > H ₀ ), the flow proceeds to STEP 17, and the overflow water level grasping means 30 further adds the 50 liter bathtub 8.
And hot water in, to hold the detection level of the level sensor 25 after the hot water as S ₁₀ in STEP 18. And S in STEP19
When the ₁₀ and S ₅ were equal, i.e., at STEP 17 50
If it can be determined that hot water has already overflowed from the bathtub 8 before the liter hot water is supplied, the process branches to STEP 55 and proceeds to STEP 55.
The test run is stopped in the same manner as in Step 16 (NG stop).

[0045] In STEP 19, when the S ₁₀ and S ₅ not equal (S _10> S _5), the water level detection means 30 overflows,
In STEP20, supply another 30 liters of hot water, and in STEP2
1 holds the detection level of the level sensor 25 after the hot water supply as S _13. Then, when the S ₁₃ and S ₁₀ were equal in STEP 22, prior to 30 liters hot water at STEP 20,
It can be determined that hot water has already overflowed from bathtub 8. That is, it can be determined that hot water overflowed from bathtub 8 when 50 liters of hot water were supplied in STEP 17.

Therefore, the STE branched from STEP 22
In P60, the upper limit water level determining means 31 determines that the overflow water level H _F (=
Based on the S _10), the hot water that reaches the該溢Re level H _F (ST
The equation (1) below from S ₅ is a water level before EP17) is carried out, calculating the water level unit U _H is a setting unit for determining the setting range of the target hot water filling the water level due to hot water filling level setting switch 45 I do.

U _H = (S ₅ −H ₀ ) / 12 (1) The following STEP 61 is processing by the hot water supply / water supply amount calculating means 32. The hot water supply amount calculation means 32 calculates the reference water level H
From 50 l is a hot water supply amount that has been accumulated by the hot water supply amount accumulation means 34 to reach the S ₅ from _0, in the hot water supply amount required in order to perform a hot water filling of the water level unit U _H by the following equation (2) A certain hot water supply unit U _V is calculated by the following equation (2).
It is calculated by:

U _V = 50 liters / 12 (2) STEP 32 to STEP 36 advanced from STEP 61
Is an upper limit water level determining means 31 and a hot water supply water amount calculating means 32
This is the processing by In STEP32, the counter variable n
Is set to 1 (initial value), and the counter variable n is set to STE
In P35, one is added. Then, in step 36, n
Steps 33 and 34 are executed until ≧ 13, that is, for n = 1, 2,..., 12.

STEP 33 is processing by the upper limit water level determining means 31. The upper limit water level setting means 31 calculates the target filling water level set in 12 steps by the filling water level setting switch 45 (see FIG. 2) using the water level unit U _H calculated by the above equation (1) using the following equation. Determined by (3).

H _n = H ₀ + U _H × n (3) (n = 1, 2,..., 12) As a result, in accordance with the operation of the target filling level setting switch 45, the target The filling water level is H ₀ as the lower limit and H ₁₂ as the upper limit.
(Corresponding to the water level setting range of the present invention).

[0051] When it is determined in this way the setting range of the target water filling level, with reference to FIG. 6, H _12, which is the upper limit of the target water filling the water level, regardless of the differences in the depth of the tub 8,
It is set to a lower level than the overflow level H _F. for that reason,
Hot water is not supplied until the capacity of the bathtub is exceeded when the bath is filled.

Referring to FIG. 2, when the filling level setting switch 45 is operated, the position of the level pointer 56 is changed according to the target filling level (12 levels) set according to the operation. Moving. When the level pointer 56 is positioned h ₁₂ is the upper limit level, it target hot water filling level corresponds to is set to H ₁₂ close to the water level H _F overflow. The level pointer 56 when located at the h ₁ is the lower limit level, a target hot water filling level is set to H ₁ close to the reference water level H _0.

Therefore, the water level scale 55 and the level pointer 56 can be used to make the water level in the bathtub 8 assumed by the user coincide with the actually set target water level. Thereby, the target filling water level is set according to the user's intention.
6 Despite being located at the upper limit level h _12, becomes extremely low water level than the water level H _F overflow the target water filling level to be set, hot water filling the lower user unintentionally water level line It can be prevented from being damaged.

The following STEP 34 is a process by the hot water supply amount calculating means 32. Hot water supply amount calculation means 32
Is the target hot water level (H ₁ ,
H _2, ..., H ₁₂ ), the target hot water supply amount, which is the amount of hot water required to fill the hot water, is calculated using the capacity unit U _V calculated by the above equation (2). Determined by equation (4).

V _n = V ₀ + U _V × n (4) (n = 1, 2,..., 12) Then, when n = 13, the processing proceeds from STEP 36 to S
Proceeding to TEP37, the trial run ends.

Incidentally, the accumulated amount from the start of hot water supply to the bathtub 8 until reaching the reference water level H ₀ , which is maintained at V ₀ in STEP 13, and H ₁₂ which is the upper limit of the target hot water level from the reference water level H _0.
Of the cumulative hot water supply up to 50 liters (V ₀ +5
0 liter) corresponds to the upper limit hot water supply amount of the present invention. Therefore, based on the upper limit hot water supply amount, the target hot water supply amount is calculated from Expressions (2) and (4).

Next, in STEP 22, when S ₁₃ and S ₁₀ are not equal (S _13> S _10), the overflow water level detection means 3
0 is for additional 30 liters hot water in STEP23, ST
Holding the detection level of the level sensor 25 after the hot water supply as S ₁₆ in EP 24. Then, when the S ₁₆ and S ₁₃ were equal in STEP 25, it can be determined that before 30 l hot water at STEP 23, was already hot water overflow from the bath 8. That is, it is possible to determine that hot water overflowed from bathtub 8 when 30 liters of hot water were supplied in STEP 20.

Therefore, the STE branched from STEP 25
In P65, the upper limit water level determining means 31 determines the above-mentioned STEP.
Similarly to 60, the overflow water level H in this case_F(= S₁₃Based on
The overflow water level H_FHot water reaching (STEP20)
S, which is the water level before the _TenFrom the following equation (5)
The water level unit U_HIs calculated.

U _H = (S ₁₀ −H ₀ ) / 12 (5) The following STEP 66 is processing by the hot water supply / water supply amount calculation means 32. The hot water supply amount calculation means 32 determines whether or not the S
Similar to TEP61, from 100 liters a hot water supply amount that has been accumulated by the hot water supply amount accumulation means 34 to reach the S ₁₀ from the reference water level H _0, is calculated by the equation (6) below the hot water supply unit U _V STEP 32 Proceed to.

[0060] U _V = 100 l / 12 ..... (6) Next, when S ₁₆ and S ₁₃ are not equal in STEP25 (S _16> S ₁₃₎ is set to 1 ,, counter variable i And
The overflow water level grasping means 30 is described in STEP27 to STEP29.
And a loop composed of STEP70 and STEP71.

In the loop, in STEP 27, 30
Liter of hot water, and the detected water level of the water level sensor 25 after hot water supply is held as S16 _{+ 3i} in STEP28, and in STEP29
It is checked whether the water level of the bathtub 8 has changed before and after hot water supply. Then, when it is recognized in STEP 29 that the water level in the bathtub 8 has not changed, it can be determined that the hot water has already overflowed from the bathtub 8 before supplying 30 liters of hot water in STEP 27. That is, it can be determined that hot water overflowed from bathtub 8 when 30 liters of hot water were supplied in STEP23 or STEP27.

Therefore, the STEP which has proceeded from STEP 29
In step 30, the upper limit water level determining means 31 executes the processing in step 6 described above.
0, the overflow water level H _F (= S
_{13 + 3i)} on the basis of,該溢Re hot water reaching the water level H _F (S
The water level unit U is calculated from S _{10 + 3i} , which is the water level before the execution of STEP 23 or STEP 27), by the following equation (7).
Calculate _H.

U _H = (S _{10 + 3i} −H ₀ ) / 12 (7) The following STEP 31 is processing by the hot water supply / water supply amount calculating means 32. The hot water supply amount calculation means 32 determines whether or not the S
Similar to the processing of TEP61, the reference water level H ₀ to S _{10 + 3i}
From a hot water supply amount that has been accumulated (100 + 30i) l by the hot water supply amount accumulation means 34 to reach, the process proceeds to the capacitive unit calculates the U _V by the following equation (8) STEP 32.

U _V = (100 + 30i) / 12 (8) On the other hand, if the detected water level of the water level sensor 25 has not changed in STEP 29, the flow branches to STEP 70 to add 1 to the counter variable i. If the counter variable i is less than 13 in STEP 71, the flow branches to STEP 27 to further supply 30 liters of hot water. When the counter variable i becomes 13 in STEP 71, that is, when the hot water does not overflow from the bathtub 8 in spite of the fact that the cumulative hot water supply amount from STEP 7 has exceeded 500 liters, the water in the bathtub 8 is in the middle of the test operation. It is assumed that the stopper (not shown) has come off (usually the bathtub capacity will not exceed 500 liters). Therefore, the overflow water level grasping means 30 is provided in STEP7.
Proceed to 2 and stop the trial run (NG stop).

By executing the test operation described above, the bathtub 8
Setting range of the target hot water filling level in accordance with the depth (H ₁ ~
H ₁₂ ) is determined. Also, the target hot water level H _n (n =
The target hot water supply amount V _n (n = 1, 2,..., 12) required to perform the hot water filling of 1, 2,..., N) is calculated. Accordingly, the hot water supply control means 33 determines that the cumulative hot water supply amount by the hot water supply amount accumulating means 34 is equal to the target hot water supply water amount V
to reach _n, by hot water to bath 8, to perform the hot water filling the target hot water filling level H _n.

[0066] in this manner, by performing water filling to convert the target hot water filling level H _n to the target hot water filling hot water quantity V _n, tub 8 at the water level sensor 25 by interrupting the water filling during water filling running It is not necessary to check the water level. Therefore, the time required for filling with hot water can be reduced. Further, since the filling level sensor 16 generally has higher detection accuracy than the water level sensor 23, more accurate filling can be performed.

[0067] Further, when performing hot water filling by the target hot water filling hot water quantity V _n, when the water filling is performed in a state where water faucet tub 8 are out, the hot water until the target hot water filling hot water quantity V _n Since the hot water filling is completed, the hot water filling is not continued indefinitely. Also, even if the water level sensor 25 breaks down, hot water can be filled.

In the present embodiment, the water level sensor 25 is used only in the above-described trial operation, and the water level sensor 25 is not required in subsequent filling. For this reason, the water level sensor 25 may be made detachable, whereby the cost of the automatic filling device can be reduced.

[0069] Further, in the present embodiment, the hot water filling hot water supply amount calculating means 32, were subjected to hot water filling to the tub 8 by replacing the target water filling level H _n to the target hot water filling hot water quantity V _n, the water level sensor while detecting the water level of the tub 8 by 25, also by hot water to the target hot water filling level H _n, it is possible to obtain the effect of the present invention.

Further, in this embodiment, the target filling water level is set in 12 steps, but may be set in 11 steps or less, or 13 steps or more. Further, referring to FIG. 6, in the present embodiment has been set a target hot water filling level H ₁ to H ₁₂ at regular intervals, wider spacing of low water side, to set narrow interval high water side It may be.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an example of an automatic hot water filling device of the present invention.

FIG. 2 is a configuration diagram of a remote controller shown in FIG. 1;

FIG. 3 is a flowchart showing a process for determining a setting range of a filling water level.

FIG. 4 is a flowchart showing a process for determining a setting range of a filling water level.

FIG. 5 is a flowchart showing a process for determining a setting range of a filling water level.

FIG. 6 is an explanatory diagram of a hot water level in a bathtub.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hot-water supply means, 2 ... Additional heating means, 3 ... Controller, 4
... Heat exchanger for hot water supply, 5 ... water pipe, 6 ... normal water pipe, 7 ...
Water pipe for bathtub, 8 ... bathtub, 10 ... incoming water temperature thermistor, 1
DESCRIPTION OF SYMBOLS 1 ... Inflow water flow sensor, 12 ... Hot water amount servo, 13 ... Hot water temperature thermistor, 14 ... Circulation path, 15 ... Solenoid valve, 16 ... Hot water filling flow sensor, 17 ... Hopper, 18 ... Check valve, 19 ...
Three-way valve, 20: bath pump, 21: heat exchanger for additional heating,
Reference numeral 22: hot water supply port, 23: water flow switch, 24: bath tub temperature thermistor, 25: water level sensor, 30: overflow water level grasping means,
31: upper limit water level determining means, 32: hot water supply water amount calculation means, 33: hot water supply control means, 34: hot water supply amount accumulating means, 4
0 ... remote control, 45 ... hot water level setting switch, 55 ...
Water level scale, 56 ... Level pointer

Claims (3)

[Claims] 1. A hot water supply means for supplying hot water to a bath tub, a water level sensor for detecting a water level in the bath tub, and
Filling water level setting means for setting a target filling water level, which is a target value of the filling water level of the bathtub, within a predetermined water level setting range, and the level of the target filling water level set by the filling water level setting means, Filling level display means for displaying the lower limit of the water level setting range as the minimum level and the upper limit of the water level setting range as the maximum level, and controlling the amount of hot water supplied to the bathtub by the hot water supply means to fill the target filling level water. Automatic water filling apparatus comprising a water filling control means for performing hot water supply to the bath tub by the hot water supply means while detecting the water level of the bath tub by the water level sensor, and detecting when the water level detected by the water level sensor stops rising. An overflow water level grasping means for grasping a water level as an overflow water level; and an upper limit water level determining means for determining an upper limit of the water level setting range based on the overflow water level. Doyu clad equipment. 2. A flow rate sensor for detecting a flow rate of hot water supplied from the hot water supply means to the bathtub, a hot water supply amount accumulating means for calculating a cumulative hot water supply amount to the bathtub using a detection value of the flow rate sensor, From the start of hot water supply until the water level detected by the water level sensor reaches the upper limit of the water level setting range, the upper limit hot water supply amount is calculated by the hot water supply amount accumulating means, and the upper limit hot water supply is calculated. A hot water supply amount calculating means for calculating a target hot water supply amount, which is a required hot water supply amount for performing the hot water filling of the target hot water level, based on an amount of the hot water supply. Means for starting hot water supply to the bath tub by means and means for calculating the cumulative hot water supply amount by the hot water supply amount accumulating means, and supplying the hot water to the bath tub until the cumulative hot water supply amount reaches the target hot water supply hot water supply amount. Line the water level Automatic hot water filling apparatus according to claim 1, wherein a. 3. The automatic filling system according to claim 1, wherein said water level sensor is detachable.