JP2550456Y2 - Automatic toilet flushing system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic toilet flushing system provided with a urine concentration detection sensor.

[0002]

2. Description of the Related Art Conventionally, as an embodiment of an automatic toilet flushing system D, there is a flush toilet U mounted as shown in FIG.

First, the structure of the flush urinal C will be briefly described. A vertical guide wall 74 is erected on the rear upper surface of a bowl-shaped bowl portion 72 supported on a floor 71 by a lower peripheral wall 70. A toilet body 77 is formed by projecting a pair of upper side walls 75 extending forward on both sides of the guide wall 74. A drain trap 79 is provided in the lower peripheral wall 70 and communicates with a washing water outlet 78 provided at the back of the bowl 72. Further, a water supply chamber 80 for receiving water from the automatic cleaning system D is formed in an upper part of the toilet body 77.

On the other hand, the automatic cleaning system D includes an automatic on-off valve 82 connected to a water supply chamber 80 via a water supply pipe 81a in a casing 81 thereof, and a detection output from a urine concentration detection sensor 83 described later. Control device that drives automatic on-off valve 82
84 and housed.

The urine concentration detection sensor 83 substantially comprises a pair of metal electrodes 85 and 86 immersed in the sealed water in a drain trap 79, and detects a current value flowing between the two metal electrodes 85 and 86 to detect the sensor. With or without output, automatic open / close valve based on the sensor output
The toilet 82 can be driven to clean the interior of the toilet body 77.

[0006]

However, in the urine concentration detection sensor 83 described above, since the metal electrodes 85 and 86 are in contact with water or urine, scale or the like adheres to the electrodes, and the electrode resistance changes, resulting in malfunction. Become. Therefore, it was necessary to frequently clean the metal electrodes 85 and 86. Further, when foreign matter is put into the drain trap 79, the metal electrodes 85 and 86 may be short-circuited. Furthermore, since the metal electrodes 85 and 86 must be attached by making holes in the drain trap 79 made of ceramics, the attaching operation is complicated and costly.

An object of the present invention is to provide an automatic toilet flushing system capable of solving the above-mentioned problems.

[0008]

According to the present invention, a urine concentration detection sensor is provided in a drain trap of a toilet, and the urine concentration detection sensor is insulated from an excitation electrode connected to a high-frequency oscillator and the excitation electrode. And a receiving coil for receiving an electromagnetic wave oscillated from the excitation electrode, and receives the change in the urine concentration in the sealed water in the drain trap surrounding the detecting coil as a change in the conductivity and the dielectric constant. The present invention relates to an automatic toilet flushing system characterized in that it is configured to be detected by a change in a resonance voltage or a resonance frequency induced in a detection coil for use in toilets.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on an embodiment shown in the accompanying drawings.

FIG. 1 shows a flush toilet B provided with an automatic flushing system A according to the present invention.

The flush toilet B in this embodiment has basically the same configuration as the flush toilet C in the above-mentioned prior art.

That is, a vertical guide wall 14 is erected on a rear upper surface of a bowl-shaped bowl portion 13 supported on a floor 12 by a lower peripheral wall 10, and extends forward on both sides of the guide wall 14. The toilet body 17 is formed by projecting the pair of upper side walls 15. Further, in the lower peripheral wall 10, a drain trap 19 communicating with and connected to a washing water outlet 18 provided at the back of the bowl portion 13 is provided.
Is arranged. Further, a water supply chamber 20 for receiving water from the automatic cleaning system B is formed in an upper part of the toilet body 17.

On the other hand, the automatic cleaning system A has an automatic opening / closing valve 22 connected to a water supply chamber 20 through a water supply pipe 21a in a casing 21 thereof, and a detection output from a urine concentration detection sensor S described later. Control device that drives automatic on-off valve 22
24 are stored.

In this embodiment, the urine concentration detection sensor S is mounted on the outer surface of the lower peripheral wall 10 around the drain trap 19.

The present invention is substantially equivalent to the urine concentration detection sensor S
Is characterized by having the configuration shown in FIG. 2 and FIG.

As shown in the figure, the sensor head of the urine concentration detection sensor S has a flat plate shape, and an excitation electrode is placed in a hollow disk-shaped shield container 31 mounted on the outer surface of the lower peripheral wall 10.
32, an insulating plate 33, and a receiving detection coil 34 are housed in a superposed state, and the excitation electrode 32 is connected to a high-frequency oscillator 36 housed in the casing 21 of the automatic cleaning system A by a lead wire 35. And the detection coil 34 for reception and the electrode for excitation
Reference numeral 32 is connected to a high-sensitivity AC ammeter 39 similarly housed in the casing 21 of the automatic cleaning system A by lead wires 37 and 38.

The excitation electrode 32 is a disk having a thickness of about 0.5 mm, and the receiving detection coil 34 has a planar spiral shape as shown in FIG.

Next, the operation of the automatic washing system A provided with the urine concentration detection sensor S having the above configuration will be described.

Now, when the user adds a task, the drain trap 19
The urine concentration in the sealed water increases.

On the other hand, by operating the urine concentration detection sensor S, a high-frequency electromagnetic field is applied to the excitation electrode 32 by the high-frequency oscillator 36, and the reception detection coil 34 receives the electromagnetic wave oscillated from the excitation electrode 32, A resonance peak can be observed at a certain frequency. FIG. 4 shows the measurement results.

[0021] In FIG. 4, frequencies F ₁ is rather related to conductivity, peak accordance conductivity increases increases. Resonance peak at the frequency F ₂ than those related to the dielectric constant, the peak becomes larger as the dielectric constant increases.

[0022] Therefore, when the sealing water in the drain trap 19 is conductive it may be set in the vicinity of the frequency F _1, when sealing water of the dielectric is previously set in the vicinity of the frequency F ₂ Thereby, the urine concentration in the sealed water can be detected.

Further, based on the detection output, the control unit 24
Then, the automatic opening / closing valve 22 is driven to supply flush water to the water supply chamber 20 to clean the inside of the toilet body 17.

As described above, in this embodiment, the urine concentration can be detected without bringing the excitation electrode 32 or the like into direct contact with the sealed water, so that the excitation electrode 32 is prevented from being deteriorated by scale or the like. The urine concentration can be accurately detected over a long period of time to perform the washing operation.

Further, since the urine concentration detection sensor S can be shielded over the whole, it has high durability even in a high humidity condition such as a toilet, and there is no fear of electric leakage.

Further, since it is only necessary to attach the outer peripheral surface of the drain trap 19, the attaching operation is greatly simplified.

[0027]

As described above, in the present invention, the urine concentration detection sensor is provided in the toilet drain trap, and the urine concentration detection sensor is connected to the excitation electrode connected to the high frequency oscillator and the excitation electrode It consists of a receiving coil that is insulated and receives an electromagnetic wave oscillated from the excitation electrode, and changes the urine concentration in the sealed water in the drain trap around the receiving detection coil as a change in electrical conductivity and dielectric constant. It is configured to be detected by a change in resonance voltage or resonance frequency induced in the detection coil for reception.

With this configuration, it is possible to detect the urine concentration without directly contacting the excitation electrode with the sealing water, to prevent the excitation electrode from being deteriorated by a scale or the like, and to accurately measure the urine concentration over a long period of time. And the cleaning operation can be performed. In addition, since the entire sensor can be shielded, it has high durability even in a high humidity condition such as a toilet, and there is no fear of electric leakage. Further, since it is only necessary to attach the drain trap to the outer peripheral surface, the attaching operation is greatly simplified.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a urinal including an automatic cleaning system including a urine concentration detection sensor according to the present invention.

FIG. 2 is an overall configuration diagram of a urine concentration detection sensor.

FIG. 3 is a view taken along line II of FIG. 2;

FIG. 4 is a graph showing a relationship between a resonance voltage and a resonance frequency when water is sealed in a drain trap.

FIG. 5 is an overall configuration diagram of a urinal including a conventional automatic cleaning system.

[Explanation of symbols]

 A Automatic cleaning system B Faucets 10 Lower peripheral wall 19 Drain trap 32 Electrode for excitation 34 Detection coil for reception 36 High frequency oscillator

Claims (1)

(57) [Scope of request for utility model registration] A urine concentration detection sensor is provided in a drain trap of a toilet, and the urine concentration detection sensor is insulated from an excitation electrode connected to a high-frequency oscillator and is excited by the excitation electrode. A reception coil for receiving electromagnetic waves, and a resonance induced in the reception coil as a change in the urine concentration in the sealed water in the drain trap around the reception coil as a change in conductivity and dielectric constant. An automatic flushing system for a toilet, wherein the system is configured to be detected by a change in voltage or resonance frequency.