JP3041937B2 - Circulation purification device for bathtub - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating purification device for a bath tub that performs circulating filtration and sterilization of bath water.

2. Description of the Related Art In recent years, in order to improve bath life, a sanitary circulating purification device for a bathtub that constantly keeps hot and cold water in the bathtub has been developed.

 Hereinafter, a conventional circulation purifying device for a bathtub will be described.

FIG. 4 is a schematic configuration diagram of a conventional circulating purification device for a bathtub provided with a bubble jet device.

1 is a bathtub, 2 is a pump, 3 is a three-way valve, 4 is a washing branch pipe through which hot water flows during backwashing, 5 is a filter, 6 is a second filter medium made of granular filter medium, and 7 is silver chloride having a sterilizing action. , A filter bed made of a resin filter or the like, 9 a control unit, 10 a water level detector for detecting the water level in the bathtub, and 11 a pump start switch also serving as a bubble switch. , 12 is a washing switch, 13 is a hot water inlet, 14 is a discharge port for ejecting a bubble water flow, 15 is a drain pipe for discharging hot water and dirt during backwashing, 16 is a fixture for the first filter medium 7, and 17 is a filter. Hot water flows in during operation, and the upper flowing water pipe discharges washing water and dirt to the drain pipe 15 during backwashing. Filtration water 18 flows during filtering operation, and hot water becomes washing water in the backwashing water and the filter 5 This is a U-shaped tubular lower flowing water pipe through which water flows.

The operation of a conventional circulating purification device for a bath tub equipped with the bubble jet device configured as described above will be described below.

When the pump start switch 11 is turned on, a pump operation signal is output from the control unit 9 and the pump 2 starts. When the pump 2 is started, the hot and cold water in the bathtub 1 is supplied to the suction port 13 as shown by the arrow A.
At the same time, the bubble water stream is blown out from the discharge port 14 and is supplied to the filter 5 from the upper flowing water pipe 17 through the three-way valve 3a. The first filter medium 7 captures large dust, and silver chloride is added to the hot and cold water. Is eluted and sterilized, hot water is evenly supplied to the second filter medium 6, and small dust is captured by the second filter medium 6,
After being purified, the water is discharged into the bathtub 1 via the lower flowing water pipe 18 and the pump 2, and a part of the water is flowed to the filtration pipe to perform a circulation filtration operation.

Since the filter media 6 and 7 gradually become dirty as the filtration is performed, they need to be periodically cleaned. When the washing switch 12 is turned ON, a pump operation signal and a three-way valve switching signal are output from the control unit 9 and the three-way valve is simultaneously activated when the pump 2 is started.
3a and 3b are switched, and the hot and cold water in the bathtub 1 is supplied to the suction port 13, the pump 2, the washing branch pipe 4, and the lower flowing pipe as shown by the arrow B.
After passing through 18, the filter bed 5 is washed, the filter bed 8 is washed, and the granular second filter medium 6 is made to be in a fluidized state to remove scale and small dust, and the upper surface of the first filter medium 7 made of a porous ceramic plate The hair and large debris accumulated in the water are released, drained from the drain pipe 15 through the upper flush pipe 17 and the three-way valve 3a, and the washing is continued for a predetermined time. When the water in the bathtub 1 is drained by water dropping or washing, when the water level falls below a predetermined water level, the water level detector 10 detects the water level, and the power supply of the pump 2 is turned off to prevent idling.
The drainage of hot water usually has a mechanism for preventing the filter 5 from being damaged due to freezing and storing washing water to the extent that the second filter medium is immersed in order to sterilize the granular second filter medium.

Problems to be Solved by the Invention However, in the above-described conventional configuration, when water is dropped or drained from the bathtub, silver chloride is not eluted to a degree that can be sufficiently sterilized in hot and cold water when the filtration operation time is short, and has a sterilizing effect. First
Since the filter medium is exposed to the air without being immersed in hot water, there has been a problem that various bacteria grow in the lower drainage pipe from the second filter medium section or the lower part of the filter, causing slime, etc., and becoming unsanitary.

Means for Solving the Problems The present invention relates to a filter device, wherein the height of a second three-way valve communicating with a lower water pipe connected to a lower portion of a filter is increased by a first filter medium and a second filter medium of the filter. And the height at which the first three-way valve communicating with the upper flush pipe communicating with the upper part of the filter is disposed below the height of the second three-way valve, When the water is dropped or drained below a predetermined water level, the hot water is filled up to at least the first filter medium in the filter, and at the same time, when the water level detector detects the reduction of the bathtub water, the timing means of the control unit is operated. After the elapse of a predetermined time from the start of the operation, the three-way valve is switched to the backwashing side to reduce the water level on the second filter medium in the filter.

Operation According to the above-described configuration, the first filter medium supporting silver chloride is immersed for a predetermined time at the time of dropping water or the like, and the water in the filter dissolves silver ions to an extent that can be sterilized. No germs do not occur even without the use of slime, and slime and the like do not occur. Further, after a predetermined time, the water level is reduced to the upper portion of the second filter medium, so that the filter is not damaged by freezing.

Embodiment FIG. 1 is a schematic configuration diagram of a bathtub circulation device of the present invention provided with a bubble jet device, and FIG. 2 is a cross-sectional view of a main part in a filter after a lapse of a predetermined time after falling water. The figure is an operation flowchart of the three-way valve.

1 is a bathtub, 2 is a pump, 3 is a three-way valve, 4 is a branch pipe for washing, 5 is a filter, 6 is a second filter medium, 7 is a first filter medium, 8 is a filter bed, 10 is a water level detector, and 11 is a water level detector. A bubble switch and pump start switch, 12 is a cleaning switch, 13 is a suction port, 14 is a discharge port, 15 is a discharge pipe, 16 is a fixture, 18 is a lower flowing water pipe,
Since these are the same as those in the conventional example, the same numbers are given and the description is omitted. Reference numeral 19 denotes a U-shaped tube, a three-way valve having one end communicating with the first filter medium 7 of the filter 5 and the other end communicating with the drain pipe 15.
Reference numeral 20 denotes an upper flowing water pipe having a trap mechanism connected to 3a, which is a control section having a time measuring means and having a function of activating a three-way valve by a signal of the water level detector 10.

The operation of the circulating purification device for a bath tub according to the present embodiment configured as described above will be described below.

When the washing switch 12 is turned on, the three-way valves 3a and 3b are switched from the filtering operation side to the washing operation side, the hot water in the bathtub 1 enters the filter 5, wash the filter media 6 and 7, and drain the washing water from the drain pipe 15. Wash while washing.

When the water in the bathtub falls below a predetermined water level due to washing,
Alternatively, when the plug in the bathtub 1 is removed and the inside of the bathtub is dropped, the water level detector 10 is activated, and the three-way valve 3b is switched from the washing operation side to the filtration operation side by a signal from the control unit 9, and the inside of the filter 5 and ,
Hot water is stored in the upper flowing water pipe 19 of the U-shaped pipe, and the timing means of the control unit 9 operates. After a predetermined time after the silver chloride of the first filter medium elutes into the storage water and becomes saturated, the three-way valves 3a and 3b are switched to the washing operation side by the signal of the control unit 9, and the hot and cold water in the filter 5 is changed to the second water. The water is reduced to a level on the filter medium 6. The hot water remaining in the filter 5 is saturated with silver ions,
The generation of various bacteria on the second filter medium 6, the filter bed 8, and the lower inner wall of the filter 5 is prevented, so that the inside of the filter 5 is kept hygienic without causing slime and the like. In addition, since the residual water is reduced to a level above the second filter element 6, it does not freeze in winter.

Next, residual water in the filter 5 of the bath circulation device of the present invention,
The silver ion concentration of conventional residual water was compared. Table 1 shows the results.

I in the table indicates the silver ion concentration in the filter 5 after 10 minutes of the filtration operation. II shows the silver ion concentration in the filter 5 when the water was dropped after storing hot water for 2 hours after 10 minutes of the filtration operation. In each case, 200 baths of hot water at a temperature of 25 ° C. were injected into the bathtub 1.

As can be seen from II in Table 1, the residual water of the present example was found to dissolve a large amount of silver ions of 330% or more in comparison with the conventional example, indicating that the sterilizing effect was high.

Effect of the Invention The present invention sterilizes the inside of the filter with silver ions even after the bath tub is dropped, so that various bacteria do not adhere to the filter medium and the filter bed,
Further, it is possible to provide an extremely sanitary circulating purification device for a bathtub without causing slime and the like.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a circulating purification device for a bathtub in one embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part in a filter after a predetermined time after water is dropped, and FIG. 3 is an operation flowchart of a three-way valve. FIG. 4 is a schematic diagram of a conventional circulating purification device for a bathtub. DESCRIPTION OF SYMBOLS 1 ... Bathtub 2 ... Pump 3 ... Three-way valve 4 ... Branch pipe 5 for washing 5 ... Filter, 6 ... 2nd filter medium 7 ... 1st filter medium made of a porous ceramic plate 8 ... Filter Floor, 9 Control unit 10 Water level detector 11 Pump switch that also functions as a bubble switch 12 Wash switch 13 Suction port 14 Discharge port 15, Drain pipe 16 Fixture, 17 …… Upper water pipe 18 …… Lower water pipe, 19 …… Upper water pipe 20 …… Control unit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 35/027

Claims (1)

(57) [Claims] 1. A pump for performing a circulating filtration operation and a backwashing movement of a filter medium of a filter, a first filter medium disposed at an upper part for purifying hot water and a second filter medium disposed at a lower part. A filter, an upper water pipe connected to an upper part of the filter, a first three-way valve connected to the upper water pipe, a lower water pipe connected to a lower part of the filter, and the lower water pipe A second three-way valve communicating with the water bath, a water level detector for detecting the water level of the bathtub, and a control unit for controlling the operation of the first and second three-way valves by a signal from the water level detector. A circulation purifying apparatus, wherein a height at which the second three-way valve is disposed is between the first filter medium and the second filter medium, and the first three-way valve is disposed. The height is below the height of the second three-way valve, and the circulation purifying device for a bathtub is provided.