JPS6024422A - Bathtub with water level detection device - Google Patents

Abstract

PURPOSE:To detect the water level in a bath tub by a simple constitution, without cumbersome operation, by providing a detecting device, which detects impedance that is varied with the water level in the bath tub, in a water-level detecting part. CONSTITUTION:A draining hole 5 is provided at the bottom part of a bath tub 6, and the draining hole 5 is closed by a water stop 7 and the water is stopped. Detecting lines 9a and 9b are fixed by holding tools 8a and 8b, which are connected to the upper and lower ends of the detecting lines 9a and 9b, so that a constant interval is provided. A connecting wire 10 connects the water stop 7 and the holding tool 8b so that they are freely removed. A water-level detecting part 9 is fixed by a fixing metal 11a, which is provided at the upper part of the bath tub 6, and a fixing metal 11b, which is provided at the holding tool 8a, so that the part 9 can be freely attached and detached. The change in resistance value R1, which is yielded by the change in water level in the bath tub 6 between the detecting lines 9a and 9b, is measured as follows: CMOS inverter elements 14 and 17, a resistor 15, and capacitor 16 are connected to the other end of a signal line 12, to one end of which the detecting lines 9a and 9b are connected; an oscillating circuit is formed in this way; and the oscillating frequency measured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bathtub having a water level detection device for detecting the water level in the bathtub.

BACKGROUND ART Conventional Structures and Problems With the progress of home automation, bathtubs equipped with a water level detection device for automatically boiling water and detecting the water level in the bathtub have become increasingly important.

FIG. 1 is an external perspective view of a bathtub equipped with such a conventional water level detection device.

In FIG. 1, reference numeral 1 denotes a stopper for suspending the water level sensor section 3 from the upper end of the bathtub 2. When the water level sensor section 3 is filled with water up to the set water level, the alarm unit 4
The notification unit 4 is connected to send a signal indicating the completion of water supply to the user, and upon receiving the signal, notify the user with a buzzer or the like.

However, the water level sensor section 3 requires the user to assume the desired water supply completion water level in advance and position it by moving the stopper 1, making the operation complicated and only being able to detect the water level at a fixed value. It was not possible to check the water level during water supply or when it was needed in remote areas.

In addition, the device for detecting the water level had drawbacks such as detracting from the aesthetic appearance.

Purpose of the Invention The present invention was made in view of the above-mentioned drawbacks of the conventional technology, and an object of the present invention is to provide a bathtub with a water level detection device that can detect the water level in the bathtub with a simple configuration without requiring complicated operations. shall be.

Structure of the Invention In order to achieve the above object, the bathtub with a water level detection device of the present invention comprises a bathtub body, a drain hole provided at the bottom of the bathtub, a water stop valve provided in the drain hole to stop water, and the water stopper. The water level detection unit connects the faucet and the upper part of the bathtub and detects the water level in the bathtub, and the water level detection unit is provided with a detection device that detects impedance that changes depending on the water level of the bathtub. ing.

With this configuration, the water level in the bathtub is detected by impedance detection of the water level detection section.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a partial sectional view of a bathtub with a water level detection device according to an embodiment of the present invention.

In FIG. 2, 5 is a drainage hole provided at the bottom of the bathtub 6;
7 is a water stop valve that shuts off water by closing the drain hole 6;
a and ab are holders connected to the upper and lower ends of the detection wires 9a and 9b, respectively, in order to fix the detection wires 9a and 9b made of conducting wires at a constant interval, and 1° is a connection between the water stop valve 7 and the holder 8b. A movable connection line that connects the detection wires 9a, 9b and the holder 8.
A, 8b and the connection line 1o constitute a water level detection section 9. 1
1a is a fixture provided on the top of the bathtub 6;
The water level detection part 9 can be detachably attached and fixed with the fixing metal fitting 11b provided at the part a. 12 is a detection line 9a;
9b are signal lines connected to each other to send the detected amount to the main body of the water level detection device 13.

FIGS. 3(5) and 3(B) are detection circuit diagrams of the same detection device.

In FIGS. 3A) and 3B, the same members as in FIG. 2 are designated by the same numbers and their explanations will be omitted. FIG. 3(5) shows a detection line 9a that changes depending on the water level in the bathtub 6.

In the circuit diagram when detecting the resistance value R1 occurring between 9b,
If the other ends of the signal line 12 whose one end is connected to the detection lines 9a and 9b are respectively 0 point and D point, there is a 0 point - C between C1D points.
MOS inverter element 14-resistor 16-connect point D,
Connect capacitor 16-E point from D point and CMO from E point
It is connected to the 0 point via the S inverter element 17 to form an oscillation circuit.

FIG. 3(B) shows the detection line 9 which changes depending on the water level in the bathtub 6.
In the circuit diagram for detecting the capacitance C2 that occurs between a and 9b, if the other ends of the signal line 12 whose one end is connected to the detection lines sa and 9b are point F and point G, then between points F and G. At point F - CMOS inverter element 18 - point E - resistor 19 -
A CMOS inverter element 2o and a resistor 21 are connected in parallel with a resistor 19 between points H and G to form an oscillation circuit.

The operation of this embodiment configured as above will be described below.

In FIG. 3 (5), the oscillation frequency oscillated from the oscillation circuit is 11. The capacitance of the capacitor 16 is set to 01. detection line sa,
If the resistance value occurring between 9b is R1, the oscillation frequency f1
The relationship between the capacitance C1 and the resistance value R1 is '1'' R1-01 The resistance value R1 decreases as the water level of the bathtub 6 rises. Therefore, by fixing the capacitance C1 of the capacitor 6 and measuring the oscillation frequency 11, A resistance value R1 that is inversely proportional to the water level in the bathtub 6 can be set, and the water level in the bathtub 6 can be detected by the resistance value R4.

Next, in FIG.
, 9b is 02, the relationship between the oscillation frequency f2, the capacitance C2, and the resistance value R2 is shown in Figure 3 (
As mentioned in c), f2″R@C 2 . The capacitance C2 increases as the water level in the bathtub 6 rises. Therefore, the resistance value R2 of the resistor 19 is fixed and the oscillation frequency f2 is measured. A capacitance C2 proportional to the water level in the bathtub 6 can be installed in the bathtub 6, and the water level in the bathtub 6 can be detected by the capacitance C2.

As described above, in this embodiment, focusing on the fact that the impedance of the resistance value R and capacitance C generated between the detection lines 9a and sb changes depending on the water level of the bathtub 6, an oscillation circuit is constructed, and the oscillation frequency is Since either the capacitor or the resistor that determines f is applied to the impedance generated between the detection lines 9a and 9b, by detecting the oscillation frequency f, the resistance value R or the capacitance C can be determined. The water level in the bathtub 6 can be easily raised.

Furthermore, since the water level detection unit 9 can be connected to the water stop valve 7 and also have the function of performing normal drainage, there is no need to add any new equipment to the bathtub 6, and there is no need for a complicated mechanism. Since the bathtub does not contain any water, it can be installed easily and inexpensively in existing bathtubs, and at the same time does not spoil the aesthetic appearance.

In this embodiment, the detection lines 9a and 9b are made of conductive wires, but they may be coated with resin or the like. Moreover, the water level detection part 9 includes holders 8a and sb and detection lines 9a and 9b.

Although the connecting wire 10 is used, it may be connected to the water stop valve 7 using a chain, and a detection wire made of a conductor coated with resin or the like may be attached to the chain, and various other water level detection parts 9 can be considered. Needless to say.

Effects of the Invention As described above, the bathtub with a water level detection device of the present invention can have the following effects.

(a) Since an oscillation circuit whose oscillation frequency changes according to the impedance of the water level detection section is used, the water level in the bathtub can be easily checked by detecting the oscillation frequency.

(b) Since it uses a water level detection unit that connects the water stop valve and the top of the bathtub, it also serves as a normal drainage function and at the same time detects the water level in the bathtub with a simple configuration and inexpensively without the need for new equipment. can do.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a bathtub equipped with a conventional water level detection device, Fig. 2 is a partial sectional view of a bathtub with a water level detection device according to an embodiment of the present invention, and Fig. 3 (6) and Φ) are the same. FIG. 3 is a detection circuit diagram of the detection device. . 5... Drain hole, 6... Bathtub, 7...
... Water stop valve, 9 ... Water level detection part, 9a, '9
b...River/detection line, 13...Detection device. Name of agent: Patent attorney Toshio Nakao and 1 other person
IV! J 2F4 Figure 3

Claims (3)

[Claims] (1) A bathtub body, a drain hole provided in the lower part of the bathtub, a water stopcock provided in the drain hole that shuts off water, and the water stopper and the upper part of the bathtub are connected, and the water level in the bathtub is controlled. A bathtub with a water level detecting device, the water level detecting section being provided with a detecting device for detecting an impedance that changes depending on the water level of the bathtub. (2) The bathtub with a water level detection device according to claim 1, wherein the water level detection section has two conductive wires, and is equipped with a detection device that detects impedance between the conductive wires. (3) The bathtub with a water level detection device according to claim 1, wherein the detection device includes an oscillation circuit that changes the oscillation frequency by changing impedance.