JPH0774974B2 - Bathtub water level detection control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically detecting a bath depth by changing a water level detection value of a sensor that detects the water level of a bath.

2. Description of the Related Art Conventionally, as shown in FIG. 5, a control device of this type has a bathtub 1, a hot water supply port 2 for supplying hot water to the bathtub 1, and a hot water supply port 2.
A circulation pipe 3 for supplying hot water to the water, and a water level sensor 4 for detecting the water level of the bathtub 1 in the path of the circulation pipe 3.
A pump 5 that delivers hot water to the bathtub 1, a three-way valve 6 that switches between hot water supply to the bathtub 1 and circulation reheating, a reheating burner 7 that reheats circulating water, and hot water that is supplied via the three-way valve 6. A hopper 8 for temporarily storing hot water, a hot water supply valve 9 for supplying hot water to the hopper 8, a water level detection signal from the water level sensor 4, and a hot water supply valve 9, a three-way valve 6, and a pump 5,
The hot water supply control means 10 sends a control signal to the reburning burner 7, and the hot water supply control means 10 further includes a water level setting signal from the bathtub water level setting means 12 of the remote controller 11 installed in the bathroom, and a hot water supply facility installation time. It is connected to input the bathtub full level signal from the bathtub water level setting switch 13 to be used. Further, the hot and cold water heated by the hot water supply burner 14 is connected to the hopper 8 via the hot water supply valve 9 so as to be supplied to a cullan (not shown) connected to a pipe.

SUMMARY OF THE INVENTION However, in the above-described configuration, when the hot water supply equipment is installed, water is supplied to the bathtub by a trader, and after the water level is near the full level, the switch for setting the water level of the bathtub is pressed. Was stored in the storage unit (not shown) of the hot water supply control means as the highest water level in the installation range. Therefore, there is a problem that the switch operation is required to wait until the bathtub is almost filled with water every time the installation work is performed.

The present invention is to solve such conventional problems, at the time of hot water installation, the full level of the bathtub automatically, without bothering the trader,
That is, by grasping the bathtub depth and matching the control range of the set water level of the remote control with the actual bathtub depth, the maximum setting of the set water level control range of the remote control is always matched with the full water level of the bathtub for ease of use. The purpose is to realize bath hot water supply equipment.

Means for Solving the Problems In order to solve the above problems, the bathtub water level detection control device of the present invention is a water level sensor for detecting the water head pressure of the bathtub water surface, and a water level detection signal from the water level sensor is input, and differentiated. Differentiating means for calculating a value, a water level detection signal from the water level sensor, a differential value from the differentiating means, and a bathtub water level setting value from a bathtub water level setting means of the remote controller are inputted, and the differential value is from positive to zero. The water level detection signal value at the time of change is updated as the bathtub water level set value upper limit, and thereafter hot water supply control means for performing hot water supply or reheating to the bathtub water level set value corrected based on the updated value is provided. .

Effect The present invention, by the above-described configuration, automatically detects the full water level by constantly monitoring the water level change rate during the hot water supply operation to the bathtub by the differentiating means, and sets the absolute value of the water level detection signal from the water level sensor at this time. By learning and storing as the maximum water level in the range, it is possible to accurately match the established water level and the actual water level in the bathtub thereafter.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. The same members as those in FIG. 5 of the conventional example are designated by the same reference numerals.

In FIG. 1, a water level absolute value signal 15 for inputting the absolute value of the detected value to the hot water supply control means 10 from a water level sensor 4 for detecting the water head pressure corresponding to the water level of the bathtub 1, and the time change rate of the detected value are calculated. It is connected so as to send two kinds of signals of the water level differential value signal 17 via the differentiating means 16 for converting. Further, the remote controller 11 installed in the bathroom includes a bathtub water level setting means 12 such as a volume for setting the water level of the bathtub, and an automatic boiling switch 18.
have. In the above-mentioned configuration, when the user performs automatic bath boiling after the hot water supply equipment is installed, the bath water level setting means 12 of the remote controller 11 sets an arbitrary boiling water level. Next, the control operation of the hot water supply control means 10 will be described with reference to FIG. The hot water supply control means 10 is configured to operate according to a control program stored in a memory such as a microcomputer.

In Fig. 2, (1) Input judgment of the automatic bath heating switch 18 by the remote controller 11 (A) (2) Check whether the bathtub depth has been detected (that is, after the hot water supply equipment is installed and the first use).

(3) The hot water supply valve 9 is opened, the three-way valve 6 is set to the hot water supply side to the bathtub 1, the pump 5 is turned on, and the rate of change of the water level is changed from positive to almost 0 (that is, where the water level is full) is differentiated. It is judged by the means 16. (C to E) (4) The absolute value of the water level when the rate of change of the water level becomes almost 0 is input from the water level absolute value signal 15 and stored in the memory (not shown) of the hot water supply control means 10 in the bathtub installed. It is stored as the upper limit value of the set water level range, and the fact that the set upper limit value is detected is registered. (F to H) (5) In (3) to (4), the following processing is performed after the actual water level detected by the water level sensor 4 at the bathtub depth, that is, the upper limit value of the set water level range.

The water level sensor 4 is used to input the absolute water level, and the remote control 11
Setting level in the bathtub water level setting means 12 (already (3) ~
(Absolute corrected water level at the set water level in (4))
Compared with, hot water valve 9 is opened until it reaches the set level,
The three-way valve 6 is set to the hot water supply side to the bathtub 1, and the pump 5 is turned on.

(6) When the water level reaches the set level in (5), the three-way valve 6 is set to the hot water circulation reheating side of the bathtub 1, the pump 5 is turned on, and the reheating burner 7 is ignited to perform the additional heating. Detects the circulating bath water temperature from a hot water sensor (not shown),
It is determined whether or not the set temperature of the hot water temperature setting means (not shown) of the remote controller 11 has been reached, and when the set hot water temperature is reached, boiling occurs.

FIGS. 3 and 4 show the relationship between changes in absolute water level and changes in differential water level in (2) to (3). The time when the bath starts from zero water level and reaches the water level at the hot water supply port 2 is t = t ₁ , after which the absolute water level x is monotonic until it reaches the full water level of x ₂ from x ₁ (t = t ₂ ). To increase. In this case the water level differential value y becomes y = 0 and again reaches full level y = ₁ and a constant value.

Therefore, after the hot water supply equipment is installed, the operation of (2) to (4) in FIG. 2 is performed in the first use mode of the user, and thereafter, the order of (1) → (2) → (5) → (6). Since the operation is performed by, the full-water level surface of the bathtub is detected regardless of the form of the bathtub, and thereafter hot water supply control in which the bathtub water level level and the set water level level are matched can be performed. Even when the bathtub water level setting level (equal-divided absolute value water level data) is stored in the memory in advance as initial data, this data is stored after the operation of FIG. 2 (2) → (3) → (4). By making the correction, the water level setting and the actual boiling water level can be matched with each other. Although not shown in FIG. 2, if an operation sequence that constantly monitors the water level differential value after the second use is added, even if the water level detection characteristic changes due to aging of the water level sensor, the maximum water level will change. At the time of setting, if the water level differential signal detects positive → zero before reaching the maximum water level, the same correction as (4) can be performed at this time.

Effects of the Invention According to the bathtub water level detection control device of the present invention as described above,
A water level sensor for detecting the water head pressure of the bathtub water surface, a water level detection signal from the water level sensor is input, a differentiating means for calculating a differential value, a water level detection signal from the water level sensor, and a water level differential signal from the differentiating means, Input the bathtub water level setting value from the remote control, update the water level detection signal value when the differential value changes from positive to zero as the upper limit value of the bathtub water level setting value, and then correct the bathtub based on the updated value. (1) The full water level of the bathtub installed by automatically performing the full water level operation for the bathtubs having different depths, that is, the bathtub depth By setting the adjustment range of the set water level of the remote controller to the actual bath depth, the set water level adjusting means of the remote controller (for example, digital range setting by key operation is always performed). , Or the one that sets the range in an analog manner by the adjusting volume) can be matched with the full water level of the bathtub, and the bath filling matches the actual operation regardless of the depth of the bathtub. Can be made.

(2) Once the learning operation to grasp the bathtub depth is performed,
After that, since the water will not overflow from the full water level, the bath can be boiled even if the user is away from the bathroom, relying only on the setting display and setting means of the remote controller, which is economical and easy to use.

(3) If you explain the learning operation to grasp the bathtub depth to the user beforehand, even if it is impossible to meet at the completion of the equipment construction, the range of adjustment of the set water level of the remote control will actually be adjusted automatically. Since it can be adjusted to the bath depth of, it will be a facility-saving type equipment that requires less trouble for the contractor.

[Brief description of drawings]

FIG. 1 is a control block diagram of a bathtub water level detection control device according to an embodiment of the present invention, FIG. 2 is a control flowchart diagram of the bathtub water level detection control device, and FIG. 3 is a transitional characteristic diagram of the water level absolute value change during hot water supply. FIG. 4 is a transient characteristic diagram of water level differential level change during hot water supply, and FIG. 5 is a control block diagram of a conventional bathtub water level detection control device. 1 ... Bathtub, 3 ... Circulation pipe, 4 ... Water level sensor, 10
...... Hot water supply control means, 11 ...... Remote control, 12 ...... Bath water level setting means, 16 ...... Differentiation means

Front page continuation (72) Inventor Eiichi Tanaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-62-262110 (JP, A)

Claims (1)

[Claims] 1. A bathtub, a circulation pipe for supplying hot water to the bathtub and circulating it to reheat it, a water level sensor for detecting a water head pressure on the water surface of the bathtub in a path of the circulation pipe, and a water level detection from the water level sensor. Differentiation means for inputting a signal and calculating a differential value of the water level detection signal, bathtub water level setting means for setting the bath water level provided on the remote controller, water level detection signal from the water level sensor and differentiation from the differentiating means Input the value and register the water level detection signal when the differential value changes from positive to zero by automatically operating the full level when hot water supply equipment is installed, and the full level detection value. Based on the above, the water level setting resolution of the bathtub water level setting means of the remote control is corrected and learned so that the water level setting range matches the water level change range of the bathtub, and thereafter, the water filling operation of the bathtub is performed based on the water level setting resolution after learning. Na Tub water level detection control apparatus and a hot water supply control means for Chi hot water or additional heating.