JPH11319818A - Recirculating purifying apparatus for bathing water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recycling purifying apparatus for bathing water which ensure a sufficient sterilizing function for a long time. SOLUTION: This recycling purification apparatus for bathing water is equipped with a bath water suction inlet 11 communicated with a circulation flow channel and a bath water discharge outlet 17, a sterilization bath 14 positioned in the circulation flow channel wherein sterilization is carried out by UV radiation to the bath water by an UV lamp. A control device 16 for arranging the UV radiation time of the UV lamp to be lengthened in accordance with the lowering illumination of the UV radiation from the UV lamp is provided. This controlling-device 16 controls a circulation pump 12, the UV lamp in the sterilization bath 14 and a temperature-keeping heater 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water circulating purification apparatus in which a sterilization tank is provided in a circulation channel for circulating bath water in a bath tub, and the bacteria are sterilized by ultraviolet irradiation.

[0002]

2. Description of the Related Art In a conventional bath water circulation / purification apparatus, in order to sterilize bath water, a sterilization tank is provided, and an ultraviolet lamp is arranged in the tank to remove bacteria while irradiating ultraviolet rays. The operation pattern of the ultraviolet irradiation is as follows: (a) a continuous sterilization operation of continuously irradiating ultraviolet light during bath water circulation, and (b) a certain period of time during bath water circulation. There was a case of intermittent germicidal operation in which irradiation with ultraviolet rays was repeated to remove bacteria.

FIG. 1 is a system diagram of a bath water circulation purifying apparatus.
The general system of the conventional apparatus is also configured as shown in FIG. 1 (except for the ultraviolet irradiation intensity sensor 20). In FIG. 1, 1 is a bathtub, 10 is a pre-filter,
Reference numeral 11 denotes a suction port for sucking bath water. The bath water enters through the suction port 11 and the hair, large scale,
Remove any visible trash such as trash. Reference numeral 12 denotes a circulation pump for circulating bath water, and starts operation when the bath water is sucked and circulated. Reference numeral 13 denotes a septic tank into which a purifying material such as activated carbon is inserted. The septic tank is provided so as to be connected to a location where the bath water sucked from the bathtub 1 is discharged from the circulating pump 12 by the operation of the circulating pump 12.

[0004] Reference numeral 14 denotes a disinfection tank for disinfecting bath water.
The bath water having passed through the septic tank No. 3 irradiates the ultraviolet rays of the ultraviolet lamp to obtain a disinfecting effect. Reference numeral 15 denotes a heat retaining heater having a heater section for maintaining bath water at a set hot water temperature. Reference numeral 16 denotes a control unit, which includes 12 circulation pumps and a sterilization tank 14.
Of the ultraviolet lamp and the heat retention heater 15 are controlled. 17
Is a discharge port for discharging bath water into the bathtub.

[0005]

As shown in FIG. 7A, the operation pattern of an ultraviolet lamp for disinfecting bath water in a conventional bath water circulation purifier includes (a) ultraviolet light during circulation of bath water. As shown in FIG. 7 (b), the continuous sterilization operation pattern in which the bacteria are continuously irradiated by the lamp and, as shown in FIG.
There was an intermittent sterilization operation pattern in which the ultraviolet lamp was sterilized for a certain period of time, and then the ultraviolet irradiation was stopped. In the former (a), because of the continuous operation, the life of the ultraviolet lamp is the end of the sterilization performance as it is, and in a short period of time (for example, when the lamp life is 16,000 hours, 16000 hours ÷ 365 days ÷ 24 hours = 1.8 years). Eradication performance cannot be obtained. In the latter case (b), even though the irradiation time of the ultraviolet lamp for sterilization is constant, the irradiation intensity of the ultraviolet lamp is reduced (life of the ultraviolet lamp), and the contamination of the bath water by dirt attached to the protective tube for protecting the ultraviolet lamp from the bath water is reduced. In the case of intermittent operation due to a decrease in the intensity of ultraviolet irradiation, the bacteria elimination performance may be weakened and sufficient bacteria elimination may not be performed.

SUMMARY OF THE INVENTION [0006] The present invention aims to obtain a bath water circulation purifying apparatus capable of securing a sufficient sterilization effect for a long period of time by extending the irradiation time in accordance with the decrease in the intensity of ultraviolet irradiation.

[0007]

According to a first aspect of the present invention, there is provided a bath water circulation purifying apparatus, wherein a bath water suction port and a bath water discharge port communicating with the circulation flow path are provided. A disinfection tank for irradiating ultraviolet rays with a lamp to remove bacteria, and a control means for setting a longer ultraviolet irradiation time by the ultraviolet lamp according to a decrease in intensity of ultraviolet irradiation of the ultraviolet lamp in the sterilization tank. It is.

In the bath water circulation purifying apparatus according to the second aspect of the present invention, when the operation of the bath water circulation purification is started, the irradiation of the ultraviolet rays by the ultraviolet lamp is intermittently performed, and each of the elapsed periods divided at predetermined intervals is performed. A control means is provided in which an ultraviolet irradiation time is lengthened in accordance with a decrease in the ultraviolet irradiation intensity of the ultraviolet lamp, and an operation pattern of continuous irradiation from a specific period is stored in advance.

The bath water circulation purifying apparatus according to a third aspect of the present invention includes a sensor for detecting the intensity of ultraviolet light irradiation of the ultraviolet lamp, and a control means for setting the ultraviolet light irradiation time of the ultraviolet lamp based on the ultraviolet light intensity detected by the sensor. Is provided.

In the bath water circulation purifying apparatus according to a fourth aspect of the present invention, when a bathing time zone is set, control means for setting an ultraviolet irradiation time by an ultraviolet lamp before and after the bathing time zone is provided.

In the bath water circulation purifying apparatus according to the fifth invention, a bath water suction port and a bath water discharge port communicating with the circulation flow path are provided.
A disinfection tank provided in the circulation flow path for irradiating the bath water with ultraviolet rays by an ultraviolet lamp to remove bacteria, a disinfection path in the main body and a bath water in the main body that can be switched with a bath water path during normal operation. After the bath water is disinfected by ultraviolet irradiation with an ultraviolet lamp, the sterilization operation in the main body is performed, the bath water in the main body is discharged, and the sterilization of the bath water by the ultraviolet irradiation is performed again. A control means is provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1 of the present invention will be described. FIG. 1 is a system diagram of the bath water circulation purification device. In FIG. 1, 1 is a bathtub, 10 is a pre-filter, and 11 is a suction port for sucking bath water. The bath water enters the bathtub 1 through the suction port 11, and the pre-filter 10 removes visible dirt such as hair, large dirt, and dirt.

Reference numeral 12 denotes a circulation pump for circulating bath water, and starts operation when the bath water is sucked and circulated. Reference numeral 13 denotes a septic tank into which a purifying material such as activated carbon is inserted. The septic tank is provided so as to be connected to a location where the bath water sucked from the bathtub 1 is discharged from the circulating pump 12 by the operation of the circulating pump 12.

Reference numeral 14 denotes a disinfection tank having an ultraviolet lamp for irradiating ultraviolet rays for disinfecting the bath water. The bath water passing through the purification tank 13 is removed by irradiating the sterilization tank 14 with ultraviolet rays from the ultraviolet lamp. Get fungus effect. Reference numeral 15 denotes a heat retaining heater having a heater section for maintaining bath water at a set hot water temperature. A control unit 16 controls the circulation pump 12, the ultraviolet lamp of the sterilization tank 14, and the heater 15. Reference numeral 17 denotes a discharge port for discharging bath water into a bathtub.

Reference numeral 20 denotes an ultraviolet irradiation intensity sensor provided in the sterilization tank 14. By installing an ultraviolet irradiation intensity sensor 20 in the sterilization tank 14 equipped with an ultraviolet lamp in this system, the irradiation time is calculated from the current actual ultraviolet intensity in the sterilization tank 14 to remove bacteria. It becomes possible.

FIG. 2 is a life curve of the ultraviolet lamp.
16,000 when the initial UV irradiation intensity is 100%
The initial irradiation intensity is 60% in time. From the life curve, the irradiation intensity after a certain use time is obtained, and the irradiation time is calculated.

FIG. 3 shows a decrease curve of the irradiation intensity due to the contamination of the ultraviolet lamp protection tube. Usually, quartz glass is used for the protective tube of the ultraviolet lamp. If the ultraviolet ray transmittance is set to 100% in the initial stage of use, the transmittance decreases by 15% after one year. This is the initial 100 years due to maintenance one year later.
%, The irradiation time can be calculated in advance by 15%.
% Transmittance reduction.

FIG. 4 shows a sterilization operation pattern by irradiation with an ultraviolet lamp. For example, as a condition, bath water is contained in a 250 L bath. When the circulation flow rate of the bath water is 15 L / min,
When it is assumed that harmful bacteria (for example, Legionella spp.) Pass through the eradication tank of an ultraviolet lamp five times (5 circulations), the harmful bacteria can be removed (the bacteria are not detected by the medium method). The irradiation intensity of the ultraviolet lamp required for sterilization is determined as follows. (250 L ÷ 15 L / min ÷ 60 min) × 5 circulation × 2 (safety factor) = from 2.8 hours or more to about 3 hours is required as a necessary ultraviolet light sterilization time. Here, the safety factor of 2 was estimated in consideration of a decrease in ultraviolet intensity due to contamination of the protective tube of the ultraviolet lamp after one year, a decrease in the ultraviolet transmittance of the protective tube (about 90%), and a decrease in the irradiation intensity of ultraviolet light due to other effects. The safety rate of the eradication effect is assumed.

When a bathing time is provided as an operation pattern, in order to take a bath in a bath water free of harmful bacteria, a sterilization time of 3 hours is set before and after the bathing time. After the most harmful bacteria after bathing are brought into the bath water, sterilization is performed for 3 hours. This makes it possible to remove bacteria with emphasis on bathing time.

The operation pattern (a) is a disinfection pattern of the first year of the initial period, and a disinfection time of 3 hours is provided before and after the bathing time. 3 hours x 2 times / day x 365 days = 2190 hours

The operation pattern (b) is a disinfection pattern of the second year, which is calculated from the life curve of the ultraviolet lamp as 0.9 times the irradiation intensity of the initial ultraviolet lamp, and 3 hours ÷ 0.9 × 2 times / day X 365 days = 2409 hours

The operation pattern (c) is a sterilization pattern for the third year, calculated from the life curve of the ultraviolet lamp as 0.8 times the irradiation intensity of the initial ultraviolet lamp. 3 hours ÷ 0.8 × 2 times / day X 365 days = 2738 hours

The operation pattern (d) is a sterilization pattern of the fourth year, which is calculated from the life curve of the ultraviolet lamp as 0.7 times the irradiation intensity of the initial ultraviolet lamp, and 3 hours ÷ 0.7 × 2 times / day X 365 days = 3129 hours

The operation pattern (e) is a sterilization pattern of the fifth year, which is calculated from the life curve of the ultraviolet lamp as 0.6 times the irradiation intensity of the initial ultraviolet lamp, and 3 hours ÷ 0.6 × 2 times / day X 365 days = 3650 hours

In the operation pattern (f), the sterilization after the sixth year is performed as continuous irradiation from the life of the ultraviolet lamp, and the replacement time is displayed, and the ultraviolet lamp is replaced.

However, in this operation pattern, only the life curve of the ultraviolet lamp is used as a parameter of the sterilization time. The dirt on the protective tube of the ultraviolet lamp is to be maintained in one year, and the condition is that it be cleaned and returned to the initial lamp surface (return to a clean state).

The bath water circulation purifying apparatus according to Embodiment 1
The irradiation time of the ultraviolet lamp for sterilization is set for a certain period (for example, 1).
Separate by year, set a time to sufficiently remove bacteria in the first year, set it as the shortest time to remove bacteria, and in anticipation of a decrease in the irradiation intensity of the UV lamp in the second and third years. When the eradication time is extended, the operation is set to be continuous operation when the service life is longer than the service life (replacement time of the ultraviolet lamp: for example, 5 years). The operation pattern is set and stored in the control unit in advance to control the ultraviolet irradiation time. Things.

According to the first embodiment, if the irradiation intensity of the ultraviolet lamp and the life curve are known, the maintenance time is clearly set by calculating and controlling the ultraviolet irradiation time for each certain period in advance. A great sanitizing effect can be obtained.
Further, the usage period of the ultraviolet lamp can be extended without lowering the sterilizing effect (the sterilizing effect can be maintained over a long period of time).

Embodiment 2 Embodiment 2 of the present invention will be described. FIG. 5 shows the positional relationship of the ultraviolet disinfection treatment tank in the overall configuration of the bath water circulation purification device. 51
Indicates the range of the entire main body. 52 is a bath water inlet, 53 is a circulation pump for circulating bath water, 54 is a three-way valve for switching the flow path, 55 is a purification tank, and 56 is an ultraviolet fluid treatment tank, which is a central part in this embodiment. , 57 are heaters for keeping the bath water warm, 58 is a 6-way valve for switching the flow path, 5
9 is a discharge port, 60 is a drain port, and 70 is a bathtub.

The path indicated by the solid arrow indicates a normal operation circulation path in which bath water is disinfected by ultraviolet rays. First, the bath water sucked from the suction port 52 goes to the circulation pump 53, passes through the three-way valve 54, and enters the purification tank 55, where it is purified, and then enters the ultraviolet fluid treatment tank 56, where it is kept warm. Heated by heater 57, 6-way valve (left) 58
Is discharged from the discharge port 59 to the bathtub 70 through the nozzle.

The path indicated by the dashed-dotted arrow indicates the operation path for disinfection in the main body. To remove bacteria in the bath water circulation purifying apparatus main body by the internal sanitizing operation path, the 6-way valve 58 switches the path between the normal operation path and the normal operation.
When the bath water is sucked into the tank and leaves the circulation pump 53, the bath water branches right and left at a branch point A: 81, and the bath water going rightward goes to the septic tank 55 through the three-way valve 54 and exits from the septic tank 55. Flows to the branch point B: 82 of the pipe, flows from there to the lower side of the figure, returns to the 6 (right) side valve 58, and repeats the same.

On the other hand, the bath water discharged from the circulation pump and flowing to the left at the branch point A: 81 flows to the 6-way valve (left) 58,
Then, it passes through the heat retention heater 57 and passes through the ultraviolet fluid treatment tank 5.
6 enters from the upper part, is discharged from the lower part, flows to the six-way valve (right) 58, is sucked into the circulation pump 53 through the part, and repeats the same.

The route indicated by the dotted arrow indicates the backwashing operation route. In the backwashing operation along the backwashing operation route, bath water is sucked from the suction port 52, sucked into the circulation pump 53 via the six-way valve (right) 58, and flows to the left at the branch point A: 81. At this time, the reason why the flow only flows to the left at the branch point A: 81 is because the three-way valve 54 is switched.

Then, it passes through the heat retention heater 57 through the 6-way valve (left) 58, enters from the upper part of the ultraviolet fluid treatment tank 56, is discharged from the lower part, and goes to the branch point B: 82, where Enter the right septic tank 55 (at this time, the 6-way valve 58
The reason for this is that the 6-way valve (right) has been switched).
The water is discharged to the outside of the main body and the outside of the bath through the bath 4. The structure switches to such three types of circulation paths.

FIG. 6 shows an operation pattern in a case where sterilization in the main body is performed. A before B1 bathing time
1. Perform the ultraviolet disinfection operation of the bath water by the normal operation,
After bathing in 1, bath ultraviolet ray disinfection is again performed by the normal circulation of A1. After that, the sterilization operation in the main body of C1 is performed, the sterilization in the septic tank and the main body piping is performed, and then the sterilization of D1 is performed. The backwash operation is performed, the bath water after the sterilization in the main body is completed is discharged, and further, the ultraviolet sterilization of the bath water by the normal operation of A2 is performed.

The control of the circulation pump 53, the three-way valve 54, the six-way valve 58, and the like for performing such operation control is performed by the main body 5
A control means (not shown) comprising a control unit provided in 1
Done by

According to the second embodiment, when a device for removing the bacteria in the bath water circulating / purifying apparatus main body and switching the circulation path of the bath water discharge in the main body is provided, the ultraviolet sterilization is carried out in the main body. After the internal bath water is drained, the sterilization of the bath water and the entire body can be performed by performing the ultraviolet sterilization operation again.

[0038]

According to the first aspect of the present invention, the irradiation time of the ultraviolet rays is lengthened in accordance with the decrease in the ultraviolet irradiation intensity of the ultraviolet lamp, so that a sufficient sterilization action can be secured for a long period of time. .

According to the second aspect of the present invention, when the operation of cleaning the bath water circulation is started, the irradiation of the ultraviolet rays is intermittently performed, and in accordance with the decrease in the ultraviolet irradiation intensity for each period of the elapsed period divided at predetermined intervals. Since the ultraviolet irradiation time is extended and the continuous irradiation is performed from the specific period, a sufficient sterilization action can be more appropriately secured over a long period of time.

According to the third aspect, the ultraviolet irradiation time is set based on the ultraviolet light intensity detected by the sensor, so that a sufficient sterilization action can be ensured for a long time in accordance with the actual condition of the ultraviolet light irradiation intensity. Can be.

According to the fourth aspect, when the bathing time period is set, the ultraviolet irradiation time is set before and after the bathing time period. Measures can be implemented.

According to the fifth aspect of the present invention, the disinfecting action including the inside of the main body can be sufficiently and appropriately secured.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a bath water circulation purifying apparatus in an embodiment according to the present invention and a conventional apparatus.

FIG. 2 is a diagram showing a life curve of an ultraviolet lamp.

FIG. 3 is a diagram showing a curve of a decrease in ultraviolet irradiation intensity due to contamination of an ultraviolet lamp protection tube.

FIG. 4 is a diagram showing a sterilization operation pattern by irradiation with an ultraviolet lamp.

FIG. 5 is a diagram showing a configuration of a bath water circulation purifying apparatus having a normal operation path, a main body sanitization operation path, and a backwash operation path according to a second embodiment of the present invention.

FIG. 6 is a diagram showing an operation pattern for a normal operation route, an in-body disinfection operation route, and a backwash operation route in Embodiment 2 of the present invention.

FIG. 7 is a diagram showing a conventional sterilization operation pattern by ultraviolet lamp irradiation.

[Explanation of symbols]

1 bathtub, 10 pre-filter, 11 bath water suction port, 12 circulation pump, 13 purification tank, 14 sanitizing tank (ultraviolet lamp), 15 heat retention heater, 16 control unit,
17 discharge port, 20 UV irradiation intensity sensor, 51 main body, 52 suction port, 53 circulation pump, 54 three-way valve,
55 septic tank, 56 ultraviolet fluid treatment tank, 57 heat retention heater, 58 6-way valve, 59 discharge port, 60 drain port, 7
0 Bathtub.

Claims (5)

[Claims] 1. A bath water suction port and a bath water discharge port communicating with a circulation flow path, and a disinfection tank provided in the circulation flow path for irradiating bath water with ultraviolet rays by an ultraviolet lamp to remove bacteria, A bath water circulation purifying apparatus, further comprising control means for setting a longer UV irradiation time by the UV lamp according to a decrease in UV irradiation intensity of the UV lamp in the sterilization tank. 2. At the start of bath water circulation purification operation, ultraviolet irradiation by an ultraviolet lamp is performed intermittently, and in accordance with a decrease in the ultraviolet irradiation intensity of the ultraviolet lamp for each period of an elapsed period divided at predetermined intervals. 2. The bath water circulation purifying apparatus according to claim 1, further comprising a control unit that extends the ultraviolet irradiation time and stores an operation pattern in which continuous irradiation is performed from a specific period in advance. 3. The apparatus according to claim 1, further comprising a sensor for detecting the intensity of the ultraviolet light emitted from the ultraviolet lamp, and control means for setting an ultraviolet light irradiation time of the ultraviolet lamp based on the intensity of the ultraviolet light detected by the sensor. A bath water circulation purifying apparatus according to item 1. 4. The bath water circulation purifying apparatus according to claim 1, further comprising control means for setting an ultraviolet irradiation time by an ultraviolet lamp before and after the bathing time zone is set. 5. A bath water suction port and a bath water discharge port communicating with a circulation flow path, and a disinfection tank provided in the circulation flow path for irradiating bath water with ultraviolet rays by an ultraviolet lamp to remove bacteria, In addition to providing a disinfection path in the main unit and a discharge path for the bath water in the main unit that can be switched with the path of the bath water during normal operation, after disinfecting the bath water by irradiating ultraviolet rays with an ultraviolet lamp, perform a disinfection operation in the main unit, A bath water circulation / purification device, further comprising control means for discharging bath water in the main body and removing bacteria from the bath water by ultraviolet irradiation again.