JPH09294683A - Apparatus for cleaning of hot water in bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To immediately stop supplying of power and to keep safety not only when such abnormal cases as falling down, overheating and leakage of electricity occur in an apparatus main body but also when excess electric voltage is applied on a power supplying line caused by lack of neutral lines and erroneous wiring in a single phase three line type wiring. SOLUTION: An excess electric voltage safety device 20 consisting of an excess electric voltage detecting means 21 for detecting loading of excess electric voltage, a power cut-off means 22 for cutting off immediately supplying of power when the excess electric voltage is detected, a power cut-off condition holding means 23 for keeping continuously power cut-off condition, and a power cut-off condition releasing means 24 for releasing power cut-off condition, are arranged on the way of an electric source supply line 17 and a means 25 for detecting abnormality of the apparatus provided with this safety device in the apparatus main body 4 is actuated even when such abnormal cases as falling down, overheating, leakage of electricity, etc., are detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub apparatus, and more particularly to a bathtub hot water purification apparatus for sucking hot water in a bathtub, performing cleaning treatment such as filtration, sterilization and heat retention, and then ejecting the hot water again into the bathtub. It is a thing.

[0002]

2. Description of the Related Art Recently, hot water in a bathtub is sucked up by a circulation pump, dirt is filtered by a filtration tank, heated by a heater and kept at a preset temperature, and further sterilized by ozone or ultraviolet rays.
A bath water purifying device, which is a so-called 24-hour bath device, has been developed and widely used, in which hot water is constantly kept clean and at an appropriate temperature so that it can be bathed for 24 hours.

An example of the hot water purifying device for the bathtub is as shown in FIG. 4, and 4 is a main body for accommodating the cleaning treatment equipment as a unit. A filtration tank 5 for filtering, a circulation pump 6 for forcedly circulating hot water, and a heater 7 for keeping the hot water at a set temperature are connected in series by a connecting pipe and housed, and as an ozone generator for sterilizing the hot water with ozone. The ozonizer 8 is stored.

The hot water inlet of the bathtub 1 is a prefilter 1 for removing large dirt in the hot water sucked into the apparatus body 4 in advance.
No. 0 is attached, a jet nozzle 11 for ejecting the purified hot water into the bathtub 1 as a jet flow is attached to the spout, and the apparatus main body 4 is mounted on the prefilter 10 in which the hot water pipe 3 is attached to the hot water spout. Then, the spout tube 9 is connected to the jet nozzle 11 attached to the spout opening and attached to the bath 1.

Further, an intake pipe 12 is connected to the negative pressure portion of the jet nozzle 11, and a solenoid valve 13 for opening and closing the pipe line is attached to the tip of the intake pipe 12, and the sucked air is ozoned in the middle. In order to do so, the ozonizer 8 is attached.

In the above apparatus, the hot water 2 in the bathtub 1 is sucked by the hot water suction pipe 3 into the apparatus main body 4 while the prefilter 10 removes large dirt by the operation of the circulation pump 6, and is first filtered by the filtration tank 5. Then, after being kept warm by the heater 7, it is jetted again from the jet nozzle 11 at the tip of the spout tube 9 into the bath 1.

At this time, when the solenoid valve 13 is open, the air sucked from the intake pipe 12 is mixed with the hot water, and a jet jet containing air is jetted from the jet nozzle 11 into the bath tub 1 to form a bubble bath and the ozonizer 8 Is activated, the ozonized air is jetted as a jet jet into the bath 1 to sterilize the hot water 2 with ozone.

Further, the device is provided with a device abnormality safety device for stopping the operation when the device is overturned or overheated is detected by a sensor, or when the microcomputer detects any other abnormality. .

FIG. 5 shows an example of a device abnormality safety device. In this device, the device body 4 has a device for detecting device failure, a fall detection switch 14 that operates when a fall is detected, and overheat detection. Temperature fuse that operates when
5, and a relay switch RY2 that operates when the microcomputer 16 detects an abnormality such as an electric leakage or other
Are deployed in series.

On the other hand, a power cutoff switch 19 is provided on a power supply line 17 for supplying a commercial power of 100 V AC to the circulation pump 6 of the apparatus body 4, the heater 7 and an insulating transformer for making a control power via a power plug 18. A relay switch ry3 is provided.

Further, the relay switch ry3 serving as the power cutoff switch 19 provided in the power supply line 17 is provided with the fall detection switch 14, the temperature fuse 15, and the relay switch ry2 as the device abnormality detecting means provided in the device body 4. The circuit configuration is such that it operates when any one of them operates.

Therefore, in the apparatus main body 4, when some abnormality occurs and any of the apparatus abnormality detecting means is activated, the relay switch ry3 as the power cutoff switch 19 of the power supply line 17 opens and the power supply is immediately cut off. It is designed to prevent dripping, fire and electric shock.

Recently, more and more households have a single-phase three-wire type power line laid, and the neutral wire connection becomes defective in front of the distribution board, resulting in a neutral wire phase failure or equipment installation. In the case of a dedicated outlet, if incorrect wiring occurs by mistakenly wiring 200 V, an overvoltage is applied to the device body 4, and an accident such as damage, fire, or electric shock occurs as in the case of the above-mentioned abnormality. There is a risk of

For this reason, in the conventional apparatus, a varistor is provided between the power supply lines 17 to limit the voltage applied to the apparatus main body 4 to a certain low voltage, and at the same time, the power supply side from the position where the varistor is provided. When the fuse is installed at the position and the overvoltage is applied, the fuse is melted and the power supply is cut off to stop the operation of the device.

In this way, it is possible to prevent an overvoltage from being applied to the apparatus main body 4 due to a neutral wire open phase or miswiring, and if the fuse is blown out, the fuse is checked by a service person. The safety was maintained by ensuring that the equipment could only be restarted after it was replaced.

[0016]

However, as a safety device for preventing the application of an overvoltage to the main body 4 of the device, a varistor and a fuse are provided in the power supply line as described above, so that the safety device is large and costly. There is a drawback that it becomes.

Because the bath water cleaning device has a large rated power because the heater having a rated power of 800 to 1000 W is provided, the fuse to be installed in the power supply line 17 must have a large rated current of about 15 A. The varistor becomes large, the varistor becomes large, the cost becomes high, and when the fuse is blown out, it takes time to replace it later.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide an overvoltage safety device which is small in size, low in cost, and operates accurately.

[0019]

That is, the present invention is an apparatus main body in which hot water in a bathtub 1 is sucked by a hot water pipe, and a cleaning pump such as a circulation pump, a filtration tank, a heater for keeping heat, and a sterilizer is integrally provided. In a bath water purifying device that circulates the inside of the bath and purifies hot water into the bathtub 1 again from the spout pipe, in order to prevent the overvoltage from being applied to the device body, an overvoltage is applied to the power supply line. An overvoltage safety device that detects and shuts off the power supply is provided, and the power supply is shut down immediately when an overvoltage is detected.

The overvoltage safety device includes an overvoltage detecting means for detecting the application of an overvoltage, a power shutoff means for shutting off the power supply when the overvoltage detecting means detects an overvoltage, and a power shutoff for maintaining a power shutoff state based on the overvoltage detection. The state holding means and the power cutoff state releasing means for releasing the power cutoff state due to overvoltage and supplying the power again.

As a result of such a configuration, if the overvoltage detecting means detects that the overvoltage is applied to the power supply line to the apparatus main body, the power cutoff means immediately operates to cut off the power supply, and once the power is cut off. When the power cutoff state holding means keeps the power cutoff state and the power cutoff state releasing means is operated, the power cutoff state is released and the supply of power is resumed again.

Therefore, when an abnormality occurs such that an overvoltage is applied to the power supply line, the power supply is immediately cut off, and the state where the power supply is cut off is surely maintained until the abnormality inspection is completed. It is possible to prevent the application of dripping overvoltage accurately and surely, and at the same time, if the inspection is over, you can restart the power supply immediately by operating the power-off state releasing means without the trouble of replacing the fuse. And you can save time.

Further, the overvoltage safety device is constructed so as to operate even when the device abnormality detecting means detects an abnormality such as a fall, overheat, or electric leakage of the device, and the entire device including the power supply line is constituted by this device. Be able to maintain the physical safety.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A block diagram showing an embodiment of the present invention is shown in FIG. 1. In order to make a circulation pump 6, a heat-retaining heater 7 and a control power source of an apparatus body 4 as in the conventional example. The AC 100V power is supplied from the power supply line 17 via the power plug 18 to each of the insulation transformers.

Reference numeral 20 denotes an overvoltage safety device provided in the middle of the power supply line 17, and this overvoltage safety device 20
Is an overvoltage detection unit 21 that detects that an overvoltage is applied to the power supply line 17, a power cutoff unit 22 that cuts off the supply of power when the overvoltage detection unit 21 detects that an overvoltage is applied, and a power cutoff. From the power-off state holding means 23 for holding the state when the means 22 is activated and the power-off state is released, and the power-off state releasing means 24 for releasing the power-off state of the power-off means 22 by the power-off state holding means 23. Made of

Reference numeral 25 is an apparatus abnormality detecting means provided in the apparatus body 4, and this apparatus abnormality detecting means 25 operates by detecting various abnormalities such as overturning, overheating, and electric leakage of the apparatus, similar to the conventional example. Fall detection switch 14, temperature fuse 1
5, a relay switch ry2 which operates based on an abnormal control signal from the microcomputer 16 and the like.

With such a configuration, the power supply line 1
As soon as the overvoltage detecting means 21 connected to 7 detects the overvoltage, the power cutoff means 22 provided in the middle of the power supply line 17 is activated to cut off the power supply to the apparatus body 4, and the power cutoff means 22 The power-supply cutoff state holding means 23 to be connected operates and the power supply is kept cutoff.

In this way, at the moment when the overvoltage is applied to the power supply line 17, the power supply to the apparatus main body 4 is cut off and the operation of the apparatus is completely stopped, so that the internal electric devices are applied with the overvoltage. There is no fear of being damaged or overheated due to damage, and therefore there is no fear of fire or electric shock due to the application of overvoltage.

In this state, a serviceman inspects and repairs the cause of the overvoltage being applied to the power supply line 17 at the request of the user, and after the repair is completed, the serviceman is connected to the power cutoff state holding means 23. When the power cutoff state releasing means 24 is operated, the operation of the power cutoff state holding means 23 to the power cutoff state of the power cutoff means 22 is stopped, and power is supplied from the power supply line 17 to the apparatus main body 4 again. Then, the operation of the device is restarted.

Also, when the device abnormality detection means 25 detects that the device body 4 has fallen, overheated, or leaked, some kind of abnormality has occurred, the power cutoff means 22 of the overvoltage safety device 20 is activated, and the power cutoff state holding means. Even if the abnormality is canceled by 23, the state in which the power supply is cut off is maintained until the power-off state releasing means 24 is operated.

The embodiment of the present invention shown by the block diagrams as described above will be described below as an electric circuit based on FIGS. 2 and 3.

The power supply line 17 to which the power plug 18 is connected at the tip is connected to the apparatus main body 4 through the connector CNCE, and a relay switch RY1 serving as a power cut-off means 22 is provided in the middle of the power plug 18 and the connector CNCE. On the other hand, if the relay switch RY1 serving as the power cut-off means 22 is closed, the power of AC100V is supplied to the apparatus body 4.

A varistor N for clamping an impulse voltage from the outside between the two electric wires of the power supply line 17.
Although R1 and the noise preventing capacitor C1 are connected to each other, this varistor NR1 may be small in size because it only needs to clamp the impulse voltage from other electric devices.

Further, the relay switch RY1 as the power cutoff means 22 has a varistor N for protecting the contact.
R2 is deployed.

The power supply line 17 has a power transformer TF.
1 is connected, and a DC voltage Va of + 12V is generated by the power transformer TF1, the rectifying bridge DB1 and the capacitor C2, and this DC voltage Va is the transistor TR.
1 through 1 is a release switch RY as a power cutoff means 22.
When added to 1, the contacts are closed and power is supplied to the apparatus body 4.

The DC voltage Va changes in proportion to the voltage applied to the power supply line 17.

There is provided a circuit provided with an IC1 which is a constant voltage IC for branching from the circuit for applying the Va power source to the transistor TR1 and for generating a DC voltage Vcc of + 8V. This constant voltage IC1 is provided. The DC voltage Vcc generated by is used as a power source for the comparator IC2 and the like.

A circuit provided with a diode D2 for protecting IC1 when the power is turned off and a circuit provided with a capacitor C3 for absorbing noise are connected to the Vcc power supply circuit.

The circuit for supplying the Va power source is the connector CNCT
Device abnormality detection means 25 provided in the device body 4 via the
It is connected to the fall detection switch 14 and the like, which is provided as, and the circuit is normally closed, but is opened when an abnormality occurs.

The Vcc power source supplies a voltage of 1/2 Vcc to the non-inverting input terminal and normally the Vcc voltage to the inverting input terminal V3 to the comparator IC2.2 via the resistors R8 and R9.

In this way, the voltage of 1/2 Vcc is applied to the non-inverting input terminal of the comparator IC 2.2, Vcc is applied to the inverting input terminal V3, and the transistor TR1 is turned on.
Since it is in the state, the Va power source is the transistor TR.
An emitter and a collector of 1, a coil of a relay switch RY1 as a power cut-off means 22, a fall detection switch 14 as a device abnormality detection means 25 of the device body 4 and the like are provided in this order to a ground after passing through a circuit.

A diode D1 is provided to protect the transistor TR1 in the circuit to which the Va power source is applied.

Comparator IC 2.1 has Va and Vcc
The voltage V2 at the non-inverting input terminal is
The voltage V3 of the inverting input terminal of the comparator IC2.2 is higher than the voltage V1 of the inverting input terminal in a normal state where it is at a high level, and is lower than the voltage V1 of the inverting input terminal when V3 is at a low level. A plurality of resistors are arranged by adjusting the values, and at the same time, capacitors C4 and C5 for absorbing noise are arranged.

Further, a Zener diode ZD1 is provided in the circuit for supplying the Va power source to the comparator IC2.1, whereby the voltage V2 of the non-inverting input terminal is always higher than the voltage V1 of the inverting input terminal when the power source is turned on. .

Further, R1 and R2 are provided in the circuit for supplying the Va power source.
Is provided, and by adjusting the value of this resistance, the non-inverting input of the comparator IC2.1 when the fall detection switch 14 or the like of the device abnormality detecting means 25 of the device main body 4 is activated to open the circuit. The voltage V2 at the terminal is kept lower than the voltage V1 at the inverting input terminal.

Overvoltage safety device 20 constructed as described above
The operation of the electric circuit will be described below.

First, the operation when the power is turned on will be described. When the power is turned on at time t0, the Va voltage becomes a predetermined voltage of 12 V at time t3.

The V1 voltage supplied from the Va power supply rises from time t1 when the voltage of the Va power supply reaches the zener voltage of the zener diode ZD1 and becomes a predetermined voltage at time t3.

The voltage of the Vcc power supply is almost the same as the Va voltage until time t2, and becomes a predetermined voltage of 8 V after time t2.

The V2 voltage supplied from the Vcc power supply rises from time t0 when the power is turned on, and becomes a predetermined voltage at time t2 when the voltage of the Vcc power supply becomes a predetermined voltage.

As described above, the V2 voltage rises after the power is turned on, the V1 voltage is delayed in the rise, and the V2 voltage is always higher than the V1 voltage when the power is turned on. Therefore, the power is turned off when the power is turned on. The coil of the relay switch RY1 as the means 22 is always energized to close the contact, and power is applied from the power supply circuit 17 to the apparatus body 4.

As described above, when the power is turned on, the voltage of the input terminal of the comparator IC2.1 always becomes higher than the voltage V1 of the voltage V2, and the contact of the relay switch RY1 serving as the power cut-off means 22 is previously opened to open the main body 4 of the apparatus. Even if the power supply to the
Since the circuit configuration in which the contacts of the relay switch RY1 are always closed and power is applied to the apparatus main body 4 corresponds to the power-off state releasing means 24, this portion is surrounded by a broken line and the corresponding reference numeral is attached to the electric circuit.

Next, the operation when the fall detection switch 14 as the device abnormality detecting means 25 is activated to open the circuit and the power supply to the device body 4 is cut off will be described.

From time t4 to time t5, for example, the fall detection switch 14 as the device abnormality detecting means 25 of the device main body 4
Is activated and the contacts are opened, the comparator IC2.
As for the voltage of the input terminal of 1, the V1 voltage rises at time t4 and becomes V
The voltage becomes higher than 2 and the contact of the relay switch RY1 as the power cutoff means 22 is opened, and the power supply to the apparatus main body 4 is cut off.

Further, the comparator IC2.1 has the following characteristics when the input terminal voltage V1 is higher than the voltage V2.
The output, that is, the voltage of the inverting input terminal voltage V3 of the comparator IC2.2 becomes a low level of about 0.2V.

When the voltage V3 becomes low level, the voltage V2 is lowered because the feedback back resistor R5 is provided in the circuit on the non-inverting input terminal V2 side, and the device body 4 which had fallen at time t5 is rebuilt. Even if the V1 voltage returns to a predetermined voltage because the contact of the fall detection switch 14 is closed, the V1 voltage remains higher than the V2 voltage.

As a result, the relay switch RY1 as the power cutoff means 22 opens the contact, and keeps the power cutoff until the apparatus is checked and the power is turned on again as described above.

In this way, the contact of the relay switch RY1 as the power cutoff means 22 once opens, and the circuit for keeping the power cutoff state until the power is turned on again after checking the device corresponds to the power cutoff state holding means 23. , The electric circuit is surrounded by a broken line and the corresponding reference numeral is attached.

As described above, the device abnormality detecting means 25
The fall detection switch 14 or the like forms a closed circuit with the relay switch RY1 as the power supply cutoff means 22 using Va as a power source, so the fall detection switch 14 or the like as the device abnormality detection means 25 detects an abnormality. When activated, the circuit opens and the relay switch R as the power cutoff means 22.
Y1 is no longer energized and the contact opens.

As a result, even if the comparator circuit of the electric circuit of the overvoltage safety device 20 does not operate normally due to defective soldering or the like, the overturn detection switch 14 as the device abnormality detection means 25 detects an abnormality. The power supply to the apparatus main body 4 is cut off during the operation.

Next, the operation when an overvoltage is applied to the power supply line 17 due to a neutral phase missing phase or the like will be described.

At time t6, if an overvoltage is applied to the power supply line 17 due to a missing phase of the neutral line, the Va voltage increases in proportion to the power supply voltage, and the V1 voltage supplied from the Va power supply also increases. , V2 at time t7
It will be the same as the voltage.

When the V1 voltage and the V2 voltage become the same, as described above, the output of the comparator IC2.1 becomes a low level, the V2 voltage drops, and the contact of the relay switch RY1 as the power cutoff means 22 opens to open the device. The state in which the power supply to the main body 4 is cut off is maintained until the power is turned on again.

Therefore, the circuit provided with the Zener diode ZD1 for supplying the Va power source which changes in proportion to the voltage of the input power source to the inverting input terminal V1 of the comparator IC2.1 corresponds to the overvoltage detecting means 21. The corresponding code is attached.

In the normal state, the ratio of the V2 voltage and the V1 voltage is such that the constant voltage IC provided in the device body 4 is applied even if an overvoltage such that the V2 voltage and the V1 voltage are equal is applied to the device body 4. And aluminum electrolytic capacitors are rated not to exceed the rated voltage, and the components such as NR1, C1, DB1, C2, IC1 that compose the electric circuit of the overvoltage safety device 20 have the rated values so as to withstand the application of AC200V. Establish.

Further, in the apparatus for cleaning bath water, although not shown in the figure, the power supply line 17 is provided with an earth leakage breaker which detects an earth leakage due to the imbalance of the electric current between the two electric wires and turns off the power. 20 may be configured integrally with an earth leakage breaker.

[0067]

The present invention is constructed as described above, and immediately when an overvoltage is applied to the power supply line as well as when an abnormality such as a fall, overheating, or electric leakage occurs in the main body of the device, the power supply to the main body of the device is immediately obtained. Power to prevent damage to the equipment, fire or electric shock, and keep it safe.

Furthermore, once an abnormality is detected and the power is shut off, the power is kept shut off until the inspection is completed and an operation for canceling the shutoff state is carried out. Therefore, the safety is further enhanced.

Moreover, the operation for releasing the power-off state is simply to turn on the power again, and no troublesome operation such as replacement of fuse is necessary.

[Brief description of drawings]

FIG. 1 is a basic block diagram,

FIG. 2 is an electric circuit diagram,

FIG. 3 is an electric circuit operation diagram,

[Fig. 4] Device piping diagram,

FIG. 5 is a layout view of a conventional safety device.

[Brief description of reference numerals]

 1 Bathtub 2 Hot water 3 Hot water pipe 4 Device body 5 Filtration tank 6 Circulation pump 7 Heat insulation heater 8 Ozonizer 9 Fountain pipe 14 Fall detection switch 15 Temperature fuse (Overheat sensor) 17 Power supply line 20 Overvoltage safety device 21 Overvoltage detection means 22 Power supply Shut-off means 23 Power-off state holding means 24 Power-off state releasing means 25 Device abnormality detecting means

Claims (3)

[Claims] 1. A hot water in a bathtub 1 is sucked by a hot water pipe and is circulated in an apparatus body integrally provided with a cleansing device such as a circulation pump, a filtration tank, a heater for keeping heat, a sterilizing device, etc. In the apparatus for purifying hot water into the bathtub 1, the purified hot water is jetted again from the hot water pipe, and in order to prevent the overvoltage from being applied to the apparatus body, the overvoltage is detected in the power supply line and the power is shut off. A bathtub hot water purification device, which is equipped with an overvoltage safety device. 2. An overvoltage safety device for detecting overvoltage application, overvoltage detection means, power cutoff means for cutting off power supply when the overvoltage detection means detects overvoltage, and power supply cutoff for maintaining a power cutoff state based on overvoltage detection. 2. The apparatus for cleaning bathtub hot water according to claim 1, further comprising state holding means and power-off state releasing means for releasing the power-off state due to overvoltage and supplying power again. 3. The cleaning of bath water according to claim 1, wherein the overvoltage safety device operates even when the device abnormality detecting means detects an abnormality such as a fall of the device, overheating, or electric leakage. apparatus.