JPH09276166A - Purification device for bathtub hot water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely eliminate the danger of an electric shock accident by quickly detecting even slight earth leakage undetectable by an earth leakage breaker and taking an appropriate measure. SOLUTION: In the middle of a purification pipeline 14 for hot water 2 inside a bathtub 1 for which equipment kinds for a purification processing such as a filtering tank 5, a circulation pump 6 and a heat insulating heater 7, etc., are serially connected by a connection pipe, an electric conductivity measuring device 24 for which two electrodes 26 and 27 connected to an electric conductivity measuring circuit 28 are inserted inside an insulation pipe 25 is equipped and the result of measuring the electric conductivity of the hot water flowing through the purification pipeline by utilizing a measurement power source insulated from a commercial power source 20 is sent to a controller 18. The controller 18 performs control so as to discontinue the supply of the commercial power source to the circulation pump 6 and the heat insulating heater 7 and simultaneously display the abnormality of the electric conductivity of the hot water to a display device 19 when the electric conductivity becomes larger than a stipulated value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub device, and more particularly to a safety device against electric leakage in a bathtub cleaning device for forcibly circulating bathtub hot water through a cleaning pipe to keep the bath water clean and at an appropriate temperature.

[0002]

2. Description of the Related Art Recently, hot water in a bathtub is forcibly circulated in a cleaning pipe provided with various cleaning devices by a circulation pump, and dirt such as dirt and hair suspended in the hot water is filtered by a filtration tank. A bath water purifying device that purifies hot water by filtering and sterilizing with a sterilizing device has been developed and has been widely used.

More recently, in addition to simply cleaning the hot water, the temperature of the hot water is constantly maintained at an appropriate temperature so that a so-called 24-hour bath can be comfortably bathed for 24 hours. Furthermore, a jet nozzle has been installed at the outlet of the purified hot water to the bathtub so that the jet flow can be ejected so that a so-called bubble bath can be enjoyed.

An example of a bath water purifying device, ie, a 24-hour bath device, which constantly keeps the hot water in the bathtub clean and at an appropriate temperature, can be comfortably bathed at any time for 24 hours, and also saves water This is as shown in FIG.

1 is a bathtub, 2 is hot water, 3 is a suction pipe for pumping up the hot water 2 in the bathtub, 4 is a set of equipment for cleaning the hot water pumped by the hot water suction pipe 3. The apparatus body 9 provided is a spout tube for jetting the hot water treated by the apparatus body 4 again into the bathtub 1.

In order to remove dirt in the bath water, the apparatus main body 4 is loaded with various granular filter media such as activated carbon, activated stone, porous ceramic balls, etc. and a fibrous filter, individually or in combination, and a filtration tank 5. A circulation pump 6 for forcibly circulating hot water, an electric heater 7 for keeping the hot water at an appropriate temperature, and a cleaning device such as an ozonizer 8 as an ozone generator for sterilizing the hot water with ozone are provided. .

Reference numeral 10 is a prefilter attached to the end of the hot water pipe 3 for removing large dirt before it is pumped up to the apparatus main body 4, and 11 is hot water after cleaning treatment in the bathtub 1 as a jet flow having a high flow rate. Intake pipe 1 ejected to the
Reference numeral 2 is a jet nozzle connected to the ejector section.

As described above, various processing equipments are connected in series with each other by connecting pipes to form the cleaning pipe line 14 extending from the hot water pipe 3 to the hot metal pipe 9, and the ejector of the jet nozzle 11 at the tip of the hot metal pipe 9 is formed. An intake pipe 12 is connected to the portion to mix air into the hot water, and an electromagnetic valve 13 for opening and closing the pipe line and an ozonizer 8 for ozone-izing the sucked air are provided in the intake pipe 12.

In addition, in the cleaning pipeline 14, a hot water temperature sensor 15 for detecting the temperature of the hot water flowing through the pipeline and a circulating pump 6 running idle due to the hot water flowing out of the pipeline are provided. Differential pressure sensor 1 for detecting the pressure difference between the suction side and the discharge side
6 and 6 are deployed.

In addition to the above-mentioned various types of cleaning equipment, the device body 4 includes a fall sensor 17 for detecting a fall, a control device 18 for overall control of the device, and a display device 19 for displaying the operating state of the device. It has been deployed.

Further, a power supply cable 21 for supplying power to the apparatus main body 4 from an outlet 20 outside the bathroom detects a leakage and an earth leakage breaker 22 for cutting off the supply of power, and a controller 18 of the controller 18 when an abnormality occurs in the apparatus. A power cutoff device 23 that cuts off power supply based on control is provided.

In the above structure, when the circulation pump 6 is operated for the cleaning process, the hot water 2 in the bathtub 1 is forcedly circulated in the cleaning pipe line 14 and the tip of the hot water pipe 3 is forced to circulate. Large dirt is removed by the prefilter 10, filtered by the filtration tank 5, kept warm by the warming heater 7 based on the hot water temperature detected by the hot water temperature sensor 15, and jetted again into the bathtub 1 from the jet nozzle 11 at the tip of the hot water pipe 9. It

At this time, when the solenoid valve 13 of the intake pipe 12 is opened, the sucked air is mixed with the hot water to form a bubble bath, and when the ozonizer 8 is further operated, the sucked air is turned into ozone and the bath 1 The hot water 2 is sterilized with ozone.

During the cleaning process as described above, the control device 18 controls the differential pressure sensor 16 so that the circulation pump 6 is operated.
When the idle operation is detected, the supply of power to the circulation pump 6 and the heat retention heater 7 is cut off to prevent a fire accident due to damage or overheating of the device, and the fall sensor 17 detects that the device body 4 has fallen. Upon detection, the power cutoff device 23 is activated to cut off the supply of power to the device body 4 to prevent an electric leakage or fire accident.

Further, as a matter of course, when an electric leakage occurs, the electric leakage breaker 22 detects the electric leakage and cuts off the power supply to the apparatus main body 4 to prevent the bather from receiving an electric shock or a fire.

Although various safety devices are provided in the bath water cleaning device to prevent accidents as described above, the hot water is directly heated by an electric heat-retaining heater 7 such as a sheath heater or a ceramic heater. Partly because of the presence of electric shock, it is especially worrisome that a bather may get an electric shock due to a short circuit.

For this reason, the device is made of an insulating material such as a silicone rubber pipe, or an insulating pipe is inserted in a part of the pipe to enhance the insulating property. We are trying to prevent an electric shock accident.

[0018]

However, unlike the clean tap water, the hot water to be treated is very dirty with scale, and in many cases salts as a bathing agent are added, so that the conductivity is high. Very high.

For this reason, if the insulation of the electric circuit is broken even a little, electric leakage occurs and a large current flows in the hot water, which makes it extremely easy to receive an electric shock. Therefore, the conventional safety device as described above cannot be relieved.

In addition to the above-mentioned safety device, the present invention provides a device that enables quick and easy detection of a slight electric leakage to prevent an electric shock accident, so that the user can enjoy a comfortable and comfortable bath. With the goal.

[0021]

That is, according to the present invention, the hot water in the bathtub is pumped by a hot water pipe using a circulation pump to filter dirt on a filtration tank, sterilized by a sterilizer, and kept warm by a heat-retaining heater. In order to detect leakage in the cleaning pipe in the cleaning device for bath water, which is sprayed again from the spout pipe to the bathtub after the cleaning process and the bath water is forcibly circulated in the cleaning pipe to keep it clean and at an appropriate temperature. A conductivity measuring device that measures the conductivity of the circulating hot water is installed, and the operation of the device is controlled so that the operation can be stopped and an abnormality can be quickly found based on the conductivity of the hot water measured by this conductivity measuring device. Make the configuration like this.

Further, the conductivity measuring device having the above-mentioned structure is constituted so that the conductivity of the hot water between the two electrodes arranged in the insulating pipe is detected by the conductivity detecting circuit. It is insulated from the commercial power source, and is configured to prevent leakage from the conductivity measuring device itself and to measure the conductivity of hot water in a safe state.

[0023]

Embodiments of the present invention will now be described with reference to the drawings.

First, the structure of the piping will be described based on the piping diagram of FIG. 1. Since the piping is basically the same as that of the conventional example, the same components are designated by the same reference numerals, and the description thereof will be omitted. Only the part of the new configuration will be described.

24 is a leak rate measuring device provided at a proper position in the cleaning pipe line 14 for measuring the conductivity of the flowing hot water. The conductivity measuring device 24 is an insulating pipe 25 inserted in the pipe line. The first and second electrodes 26 and 27 are arranged at a predetermined interval in the inside, both electrodes 26 and 27 are connected to the conductivity measuring circuit 28, and the measurement result of the conductivity is sent to the controller 18. Has been done.

Next, the overall control of the apparatus including the control based on the measurement result of the conductivity of the hot water by the conductivity measuring apparatus 24 will be described based on the control block diagram of FIG.

Reference numeral 29 is a key input device provided with a plurality of keys for inputting various operating conditions such as operation / stop of the device and hot water temperature, jet, sterilization, etc., and the control device 18 is a central processing unit. CPU30, RO as a storage device storing data and programs for various controls
A microcomputer including an M31 and a RAM 32 as a temporary storage device for data for arithmetic processing.

Therefore, in the device, the microcomputer as the control device 18 sets the operating condition based on the input from the key input device 29, and at the same time, the hot water temperature sensor 1
5, the operation of each of the circulation pump 6, the heat retention heater 7, the display device 19, the power shutoff device 23, etc. is driven based on the input from the differential pressure sensor 16, the overturn sensor 17, and the conductivity measuring device 24 and the control program. Circuits 33, 34, 35, 36
Control through.

Conductivity measuring device 2 by this control device 18
The control program based on the conductivity of the hot water measured by No. 4 is as shown in the flow chart of FIG. 3. First, in the first step and 1, the conductivity measuring device 24 is flowing through the cleaning pipe 14. The conductivity of hot water is measured, and it is determined in a second step S2 whether the conductivity is within a specified value.

If the conductivity is determined to be within the specified value in the second step S2, the device is in a safe state in which no electric leakage has occurred, so the circulation pump 6 is activated in the third step S3, 4 In step S4, the operation of the heat retention heater 7 is controlled based on the hot water temperature detected by the hot water temperature sensor 15, and temperature control is started to maintain the hot water temperature set by using the key input device to start normal cleaning. The chemical conversion operation is performed.

On the other hand, if the electric conductivity is determined to be equal to or higher than the specified value in the second step S2, there is a risk that the electric leakage occurs in the device although the electric leakage breaker 22 does not operate. The heat retention heater 7 is turned off in step S6, and then the operation of the circulation pump 6 is stopped in step S6.

Further, when the conductivity of the hot water is abnormal, the display device 19 indicates that the conductivity is abnormal, and a large accident such as an electric shock may occur due to the user's leakage. To be able to quickly take appropriate measures to prevent the above.

Next, an electric circuit related to the conductivity measuring device 24 will be described with reference to the electric wiring block diagram of FIG.

By inserting the plug 37 of the power cable 21 into the outlet 20 of the AC100V commercial power supply outside the bathroom, 100V AC power is supplied to the circulation pump 6, the heat insulation heater 7 and the insulation transformer 38, and the circulation pump 6
The operation of the heat retention heater 7 is controlled by a command from the control device 18.

A power source insulated from the commercial power source supplied from the insulating transformer 38 is supplied to the control device 18 and the conductivity measuring device 24. In the conductivity measuring device 24, the insulating transformer 38 supplies a commercial power source of AC100V. The electric conductivity of the hot water between the electrodes (1) 26 and (2) 27 is measured by a safe power source which is insulated from the risk of electric shock.

The value of the conductivity of the hot water between the electrode (1) and the electrode (2) measured by the conductivity measuring device 24 is sent to the control device 18, and the control device 18 measures the conductivity as described above. When the value of the conductivity of the hot water sent from the device 24 is larger than the specified value, the commercial power supply to the circulation pump 6 and the heater 7 is stopped, and at the same time, the conductivity of the hot water is abnormal on the display device 19. It is supposed to display a warning that it is.

Next, an electric circuit for measuring the conductivity by the conductivity measuring device 24 will be described with reference to FIG.

As a power supply for operating the conductivity measuring device 24, the AC100V commercial power supply insulated by the insulating transformer 38 is rectified by the rectifier diode 39, smoothed by the capacitor 40, and stabilized by the constant voltage IC 41, and the control device. 1
Made with a power supply to operate the Microcomputer as 8.

As a power source for operating the conductivity measuring device 24, a commercial power source of 100 VAC is not insulated, rectified, smoothed, or stabilized as described above, and is used as a dry battery.
Of course, a power source completely different from the C100V commercial power source may be used.

The conductivity measuring circuit 28 of the conductivity measuring device 24
A resistor 42 is inserted in a power supply circuit from the constant voltage IC 41 to both the electrode (1) 26 and the electrode (2), and the power source voltage of the constant voltage IC 41 is the resistor 42 and the electrodes 26 and 27. The voltage is divided by the electrical resistance of hot water between the electrodes, that is, the interelectrode resistance, and a voltage is input to the A / D input terminal 43 of the microcomputer 18 according to the interelectrode resistance.

Therefore, the microcomputer 18 is
Since the voltage obtained by dividing the power supply voltage according to the change in the resistance of the hot water between the electrodes 26 and 27, that is, the resistance between the electrodes, is input to the A / D input terminal 43, the conductivity of the hot water is determined based on the input voltage. The control is performed based on the program described in the flow chart of FIG. 3 in which the ratio is calculated, and the value of the calculation result is compared with a specified value to determine whether there is an abnormality.

By constantly measuring the conductivity of the hot water in this way, even if a slight leakage occurs before the leakage such as the operation of the leakage breaker occurs, it can be detected and appropriate measures can be taken promptly to remove dirt or bath water. Even if the device has high electrical conductivity due to the influence of the agent and the electric heater for heat insulation is installed in the pipe line, which easily causes an electric shock accident due to a short circuit, the electric shock accident never occurs.

Moreover, even if the power is continuously applied to the electrodes arranged in the hot water for measuring the leak rate of the hot water, the measuring power supply is insulated from the commercial power supply, so that the conductivity of the hot water becomes high. Never get an electric shock from the measuring power supply.

[0044]

EFFECT OF THE INVENTION The present invention has the above-described structure and operation, and provides a bath water purifying device which can be comfortably bathed in clean and properly heated water 24 hours a day, without worrying about an electric shock accident. To do.

[Brief description of drawings]

FIG. 1 is an example piping diagram,

[Fig. 2] Control block diagram,

FIG. 3 is a control flow chart,

[Fig. 4] Electric block diagram,

FIG. 5: Conductivity measurement circuit diagram,

FIG. 6 is a piping diagram of a conventional example.

[Explanation of symbols]

 1 Bathtub 2 Hot water 3 Hot water suction pipe 4 Device body 5 Filtration tank 6 Circulation pump 7 Heat retention heater 9 Fountain pipe 14 Purification pipeline 18 Control device 19 Display device 20 Commercial power supply 24 Conductivity measuring device 25 Insulation pipe 26 Electrode (1) 27 Electrode (2) 28 Conductivity Measuring Circuit 38 Insulation Transformer 42 Resistor

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location C02F 1/50 550 C02F 1/50 560Z 560 B01D 35/02 J

Claims (2)

[Claims] 1. The hot water in the bathtub is pumped up by a hot water pipe using a circulation pump to filter dirt in a filtration tank and sterilized by a sterilizer.
After performing a predetermined cleaning treatment such as heat retention with a warming heater, spray the bath water again into the bathtub to force the bath water to circulate through the cleaning pipe line to keep it clean and at an appropriate temperature. It is characterized by deploying a conductivity measuring device that measures the conductivity of circulating hot water to detect leakage in the pipeline and controlling the operation of the device based on the conductivity of the hot water measured by this conductivity measuring device. Control device for bath water. 2. A conductivity measuring device is configured to detect the conductivity of hot water between two electrodes arranged in an insulating pipe by a conductivity detecting circuit, and the power source of the conductivity detecting circuit is a commercial power source. The bathtub cleaning device according to claim 1, which is insulated.