JP2003181462A - Bathtub water cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathtub water cleaning apparatus capable of accurate measurement of the concentration of chlorine. <P>SOLUTION: Bathtub water is discharged into a measurement tank 1 if necessary and the amount of chlorine is measured with a chlorine sensor 2. Chlorine of high concentration is injected into the measurement tank 1, the concentration of chlorine is measured hereat, water nearly free from chlorine is poured into the measurement tank 1 and the concentration of chlorine is similarly measured hereat. A failure of the chlorine sensor 2 is detected on the basis of these measured values. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bath water purifying apparatus.

[0002]

2. Description of the Related Art A bath water purifying apparatus is widely used in which bath water in a bath tub is circulated, taken in, purified, optionally sterilized or heated, and then returned to the bath water. Purification of bath water is mainly performed by filtration, but in recent years, chlorine sterilization has also been considered. When performing chlorine sterilization, it is important to control the concentration of chlorine. When the chlorine concentration is low, the bactericidal effect is insufficient, and when the chlorine concentration is high, there is a problem that the human body is adversely affected. Therefore, when sterilizing the bath water with chlorine, conventionally, a chlorine concentration measuring device having a chlorine sensor is used, and the chlorine sensor is provided in the bath water.
The chlorine concentration was constantly monitored, and chlorine was injected so that the chlorine concentration would fall within a predetermined range.

[0003]

However, in the case of the above-mentioned conventional apparatus, it is necessary to always put the chlorine sensor in the bath water, and a structure for protecting the chlorine sensor from stains in the bath water is required. In addition, a device for controlling the flow rate of the bath water flowing to the sensor part is required, which causes a problem that the device is expensive and complicated. Further, there is no means for confirming whether or not the chlorine concentration measuring device is operating properly, and even if excessive chlorine is added while the measuring device is broken, there is a risk that this cannot be detected. The present invention aims to solve the above problems of the prior art.

[0004]

In order to achieve the above object, the present invention relates to a bath water purifying device which takes in bath water in a bathtub, purifies it, and then returns it to the bathtub. From the route, a device for appropriately collecting bath water as needed, a measurement tank for holding the collected bath water,
A measuring device provided in the measuring tank for measuring the chlorine concentration of the sampled bath water; a device for injecting chlorine into the measuring tank; and a device for injecting water containing substantially no chlorine into the measuring tank, Input the detection value of the measuring device when chlorine is injected into the measuring tank, and the detection value of the measuring device when water containing almost no chlorine is injected into the measuring tank,
A means for issuing a warning when these detected values are abnormal,
It is characterized by having. In the above configuration, since the bath water is sampled in the measurement tank to detect the chlorine concentration, the sensor and the like are not always exposed to the bath water, and the problem of contamination does not occur. Therefore, there is an effect that the device can be simplified and the cost can be reduced. In addition, chlorine is injected into the measurement tank for measurement,
In addition, since water containing zero chlorine is used for measurement, it is possible to detect a failure of the measuring device based on the detected values of both. Further, if water containing almost no chlorine is obtained by dechlorinating bath water, the apparatus can be simplified and the cost can be reduced.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the bath water in the bathtub 50 is
It is introduced from a water inlet pipe 55 of a bath water purifying apparatus A into a filtration tank 52 via a circulation pump 51, filtered there, and heated to a predetermined temperature by a heater 53, and then a water outlet pipe 56 to a bath 50.
Configured to be returned to.

The measurement tank 1 is connected to the upper portion of the filtration tank 52 via the introduction pipe 15. The introduction pipe 15 is provided with a solenoid valve 10, and by opening and closing the solenoid valve 10, the bath water in the filtration tank 52 can be collected and guided to the measurement tank 1 when necessary. Reference numeral 11 is a filter.

As shown in FIGS. 1 and 2, the measurement tank 1 is provided with a measurement injection pipe 31 for injecting chlorine from the chlorine injector 3, and a predetermined amount of chlorine is injected from the chlorine injector 3. Is to be done. Further, it is provided with a chlorine sensor 2, which detects free effective chlorine in the bath water collected in the measurement tank 1 and sends the detection signal to the control device 4. A discharge pipe 16 is connected to the lower portion of the measurement tank 1, and the discharge pipe 16 is connected between the filtration tank 52 and the heater 53 to return the bath water of the measurement tank 1 to the circulation path.

The chlorine injector 3 is equipped with a three-way valve 30, the above-mentioned measurement injection pipe 31 and bath water injection pipe 32, and the chlorine agent (sodium hypochlorite etc.) is measured by switching the three-way valve 30. It is configured to selectively supply to the injection pipe 31 or the bath water injection pipe 32. The measurement injection pipe 31 is connected to the measurement tank 1 as described above, and the bath water injection pipe 32 is connected to the water outlet pipe 56 so as to inject chlorine into the bath water.

The controller 4 controls the entire bath water purifier, and controls the solenoid valve 10, the three-way valve 30 and the chlorine injector 3. Further, the detection signal from the chlorine sensor 2 is configured to be input to the control device 4 as described above.

In the above construction, during normal operation, the bath water is circulated from the bath 50 through the circulation pump 51, the filtration tank 52 and the heater 53 to the bath 50 to purify the bath water. When necessary, the solenoid valve 10 is opened, and the bath water is introduced into the measurement tank 1 through the filter 11 through the introduction pipe 15.

The chlorine amount in the introduced bath water is measured by the chlorine sensor 2.
Is detected by and is sent to the control device 4. This makes it possible to detect the chlorine content of the bath water. Moreover, since the chlorine sensor 2 comes into contact with the bath water only when necessary, it does not need much protection from dirt and the like. When only detecting the amount of chlorine, the solenoid valve 10 is kept open and the bath water is drained.
It is possible to do so while flowing from 6 to the circulation path.

In order to estimate the total amount of chlorine to be injected into the bath water, chlorine is injected into the measuring tank 1 to estimate it. That is, while introducing the bath water into the measurement tank 1, switching the three-way valve 30 and injecting chlorine into the measurement tank 1 through the measurement injection pipe 31, the chlorine sensor 2 sequentially checks the chlorine concentration.
When the target concentration is reached after a predetermined time, the required chlorine amount per unit of bath water is calculated from the chlorine injection amount C at this time and the amount of bath water collected in the measurement tank 1, and the required chlorine amount per unit is calculated. By multiplying the amount by the total amount of bath water, the required total chlorine amount can be obtained.

The total amount of bath water can be calculated from the volume of the bath 50 and the volume of the bath water purifying apparatus A, or can be detected by providing a flow meter or the like in the bath water purifying apparatus A. It is also possible to calculate the total amount of bath water from the chlorine injection amount C. That is, chlorine is injected into the bath water from the bath water injection pipe 32, and the solenoid valve 10 is opened at the same time.
By circulating bath water also in the measuring tank 1, the chlorine concentration is sequentially detected, and when the target concentration is reached, the injection is stopped and the chlorine injection amount C ′ at that time is detected. From this chlorine injection amount C ′, the chlorine injection amount C in the measurement tank 1 and the amount of bath water collected in the measurement tank 1, the actual total amount of bath water can be calculated.

When checking the failure of the chlorine sensor 2, a high concentration of chlorine is injected from the chlorine injector 3. It is desirable to inject chlorine at the upper limit concentration for measurement. The chlorine concentration at this time is detected by the chlorine sensor 2. Further, water with almost zero chlorine is introduced into the measurement tank 1, and the chlorine concentration at this time is detected by the chlorine sensor 2 in the same manner. The failure of the chlorine sensor 2 can be detected by these two detection values. Here, if the measured data is incorrect in either one, it is determined that the chlorine sensor 2 is abnormal.

The control device 4 is provided with an abnormality warning device 5, and when it is judged that the chlorine sensor 2 is abnormal, the abnormality warning device 5 issues an abnormality warning. The warning can be displayed by a lamp or a display, a warning by a sound such as a buzzer, a vibration, or the like, and these may be appropriately combined.

As the water containing zero chlorine, fresh water may be introduced into the measurement tank 1 by using another device, but the device can be simplified by using dechlorination of bath water. The dechlorination treatment may be performed by circulating the fluid for a predetermined time and filtering with the filtration tank 52. Further, when the apparatus A is equipped with an ultraviolet lamp, it can be dechlorinated by sufficiently irradiating it with ultraviolet rays. Dechlorination is also possible by heating the heater 53 to about 50 ° C. and keeping it warm. The inlet pipe 15 is the bath water that has been dechlorinated by the above method.
It is possible to fill the measurement tank 1 with water containing almost no chlorine by collecting the water from the measurement tank 1 into the measurement tank 1.

The operation will be described with reference to FIG. The electromagnetic valve 10 is opened to collect the bath water in the measurement tank 1, and a high concentration of chlorine is injected from the chlorine injector 3 (step S1). The chlorine sensor 2 measures the chlorine concentration to determine whether the concentration is abnormal (step S2). If it is abnormal, a signal is sent to the abnormality warning device 5 to issue an abnormality warning (step S5). If it is normal, the water obtained by dechlorinating the bath water and having almost zero chlorine is collected in the measurement tank 1 (step S3), and the chlorine concentration is measured by the chlorine sensor 2 (step S4). If the detected value is abnormal, a signal is sent to the abnormality warning device 5 to issue an abnormal warning, and if normal, the operation is terminated.

[0018]

As described above, according to the bath water purifying apparatus of the present invention, the bath water is sampled in the measuring tank when necessary and the chlorine concentration is measured by the chlorine concentration measuring device. The sensor is not required to be protected against the conventional apparatus, and the flow rate of the bath water flowing to the sensor unit of the measuring apparatus is not required to be controlled. Therefore, the apparatus can be simplified and the cost can be reduced. Further, in this measuring tank, it is possible to detect a failure of the measuring device and the like, so that highly accurate chlorine concentration detection can be realized.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged view of the measurement tank 1 according to the embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

[Explanation of symbols]

1: Measurement tank, 2: Chlorine sensor, 3: Chlorine injector,
4: Control device, 5: Abnormality warning device, 10: Solenoid valve, 1
1: filter, 15: introduction pipe, 16: discharge pipe, 30: 3
Directional valve, 31: Measuring injection pipe, 32: Bath water injection pipe, 50:
Bathtub, 51: circulation pump, 52: filtration tank, 53: heater, 55: water inlet pipe, 56: water outlet pipe.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A47K 3/00 A47K 3/00 M C02F 1/76 C02F 1/76 A

Claims (2)

[Claims] 1. A bath water purifying apparatus that takes in bath water from a bath tub, purifies it, and then returns it to the bath tub, wherein the bath water is appropriately extracted from the bath water circulating path in the bath water purifying apparatus, A measuring tank for holding the collected bath water, a measuring device provided in the measuring tank for measuring the chlorine concentration of the collected bath water, a device for injecting chlorine into the measuring tank, and the measuring tank. A device for injecting water containing substantially no chlorine, a detection value of the measurement device when chlorine was injected into the measurement tank, and a detection device for the measurement device when water containing almost no chlorine was injected into the measurement tank And a means for issuing a warning when these detected values are abnormal, and a bath water purifying device comprising: 2. The bath water purifying apparatus according to claim 1, wherein the bath water is subjected to a dechlorination treatment and the bath water is used as water containing substantially no chlorine.