JPH03292913A - Filter for bath tub - Google Patents

Abstract

PURPOSE:To remove residual water in pipes and fittings and prevent the inner surface from getting dirty and also prevent freezing by providing a controller by which after a filter flow or a backwash flow is selected on discharging water a flow change over switch is actuated to the other flow way. CONSTITUTION:When the water in a bath tub 10 is discharged, three way valves 26, 40 are selected to a flow way for the filter operation. That is, when the water level of the bath tub 10 lowers to the level of the vent 12, air flows into the filter 34 through pipes 22, 38, 42 and the water in the filter 34 is discharged into bath tub 10 through pipes 32, 28, 16. And the water in the pipes 22, 38, and the pump 18a besides these pipes 32, 28, 16 are discharged as well. After the water is discharged from the pump 18a, a signal is transmitted from a sensor equipped at the pump 18a to a controller 66 and the three way valves 26, 40 are automatically changed over to select the backwashing way by the control signal from the controller 66. And the residual water in the pipes 30, 46 is quickly discharged as well.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bathtub filtration device for filtering water (hot water or cold water) in a bathtub.

[Prior Art] This type of bathtub filtration device introduces water in the bathtub into a filter using a pump, and returns the filtered water to the bathtub. As this filtration operation continues, the filter medium becomes clogged, so backwashing is performed as necessary.

Water in the bathtub is used as this backwash water. In addition, backwash water is discharged outside the bathtub.

A conventional mechanism for performing backwashing is configured to integrate the filtration flow rate and automatically perform backwashing when the cumulative filtration flow rate exceeds a predetermined amount.

[Problems to be Solved by the Invention] In conventional bathtub filtration devices, there was a problem in that water remained in the backwash flow path and dirt easily adhered to the inner surface of the piping that constituted the flow path. Additionally, there is a risk that this residual water will freeze, and a heater to prevent freezing will be required.

[Means for Solving the Problem] The bathtub filtration device of the present invention includes a circulation system path equipped with a pump that extracts hot water in the bathtub and returns it to the bathtub again, a filter provided in this circulation system path, and the filter. A flow path that switches between a filtration flow path selection that allows water to flow through the filter in the filtration direction, and a backwash flow path selection that flows water through the filter in the backwash direction and discharges backwash wastewater to the outside of the circulation system path. In the bathtub filtration device having a switching device, the control device operates the flow path switching device so that when draining water from the bathtub, one of the filtration channel selection and the backwash channel selection is performed, and then the other is performed. It is characterized by the fact that it has been provided.

[Function] According to the bathtub filtration device of the present invention, when the water in the bathtub is drained, one of the filtration channel selection and the backwash channel selection is automatically performed, and then the other is performed. Therefore, the water remaining in the pipe constituting the backwash flow path is also discharged, and the adhesion of dirt components to the inner surface of the pipe is prevented.

[Example] Examples will be described below with reference to the drawings.

FIG. 1 is a system diagram of a bathtub filtration device according to an embodiment of the present invention. A water outlet 12 and a return port 14 for water in the bathtub are provided on the side of the bathtub 10. The inlet 12 is connected to an inlet 20 of a pump device 18 via a pipe 16. The return port 14 is connected to a discharge port 24 of the pump device 18 via a pipe 22. Inside the pump device 18 is a pump body 18.
a is installed, and is configured to suck in water from the suction port 20 through a pipe 18b, and force-feed water toward the discharge port 24 through a pipe 18c.

The suction port 20 and the discharge port 24 are a three-way joint and a four-way joint, and the suction port 20 is equipped with a $1 electric three-way valve 26.
It is connected to the pipe 28 by a pipe 28. This three-way valve 26 is communicated with the discharge port 24 via a pipe 30. Further, this three-way valve 26 is connected to a filtrate water outlet 36 of a filter 34 via a pipe 32. The inside of the filter 34 is divided into two chambers by a filter cylinder 34a made of a porous material, and the inside of the filter cylinder 34a communicates with the discharge port 36. The outside of the filter tube 34a is filled with a granular filter material 34b made of ceramic such as alumina, activated carbon, granular material carrying heavy metals, or the like.

The discharge port 24 is connected to a second electric three-way valve 40 via a pipe 38. This three-way valve 40 has a short pipe 42
It communicates with the filtrate water receiving port 44 of the filter 34 via the filter 34 . A pipe 46 is connected to the three-way valve 40 for roughly discharging backwash water.

Note that the bathtub filtration device according to this embodiment also serves as a bubble jetting device for blowing bubble-containing water into the bathtub 10.
A nozzle device 48 for mixing air is provided at the connection portion of the pipe 22 with the return port 14, and an air introducing pipe 52 is connected to this nozzle device 48.

A switch 56 is provided on the handrail portion of the bathtub 10 to perform bubble ejection and filtration operations. Water detection sensors 58 and 60 are provided at the bottom and side surfaces of the bathtub 10. Further, the pump 18a is provided with a water detection sensor 62 (not shown) to prevent dry running. Detection signals from these sensors 58, 60, and 62 are input manually to the control device 66. The control device 66 includes the switch 56 and the pump device 1.
8. It is installed to be able to communicate signals with the valve 26.40.

The operation of the bathtub filtration device configured as described above will be explained.

FIG. 2 shows flow path selection during filtration operation. That is, when the switch 56 is pressed, the three-way valve 26 connects the pipe 32 and the pipe 28, and the three-way valve 40 connects the pipe 38.
A flow path is selected to connect the pipe 42 and the pipe 42. After performing such flow path selection, the pump body IBa is activated. Then, the water in the bathtub 10 flows from the piping 1 to the zainichi 12.
6. It reaches the suction port 20, and further reaches the discharge port 24 via the piping 18b1, the pump body 18a1, and the piping 18c.

A required proportion of the water that has reached the discharge port 24 returns from the piping 22 through the return port 14 into the bathtub lo. The remainder of the water that has reached the outlet 24 flows into the filter 34 via the pipe 38,42. After being subjected to the filtration A treatment by the granular filter material 34b in the filter 34, the water passes through the filter tube 34a, reaches the filtrate outlet 36, and reaches the suction port 2o from the piping 32.28. Then, from this suction port 20, the pipe 1
8b1 The discharge port 2 passes through the pump body 18a and the piping 18c.
4.

In this way, the water in the bathtub 10 can be filtered.

Note that when water flows through the nozzle device 48, air is introduced into the nozzle device 48 from the piping 52, and air bubbles are mixed into the water spouted from the return port 14.

Therefore, the bubble jetting operation is performed in parallel with the filtration process.

FIG. 3 shows flow path selection when performing a backwash operation. That is, when the bathtub 10 starts to be filled with water, the sensor 58 first detects water, and then the sensor 60 detects water, thereby detecting that the bathtub 10 is filled with water.

In this embodiment, the reason why the two sensors 58 and 60 are provided is to detect that water (cold water or hot water may be used) is filled in the bathtub 10 when it is empty. . Therefore, even if there is a small amount of residual water in the bathtub 10 and water is added and the water level rises to the level of the sensor 60, the control device 10 does not treat it as water filling. In addition, 2
Instead of using individual water detection sensors, water filling may be detected by using an ice level sensor that detects the water level in the bathtub. Alternatively, one water detection sensor may be provided at the bottom of the bathtub to detect water filling.

When water filling is detected, backwashing is performed for a predetermined period of time in the following manner based on a control signal from the control device 66.

First, the three-way valve 26 communicates with the pipes 30 and 32, and the three-way valve 4
0 communicates with pipes 42 and 46. After performing such flow path selection, the pump body 18a is operated. Then,
The water in the bathtub 10 passes through the spout 12 and piping 16 to the suction port 20.
It then reaches the discharge port 24 via the piping 18b, the pump main body 18a1 and the piping 18c. A required proportion of the water that has reached the discharge port 24 returns to the bathtub 10 from the piping 22.

Note that air bubbles are also ejected during this backwashing operation. The remaining water that has reached the discharge port 24 from the pipe 18c is transferred to the pipe 3.
The filtered water is introduced into the filter 34 from the filtrated water outlet 36 through the 0.32 mm diameter.

After passing through the filter tube 34a, this water enters the packed bed of the granular filter material 34b and causes the packed bed of the granular filter material 34b to flow. After that, the water is transferred to the inlet 44 and the pipe 42.4.
6 and then discharged. In this way, since the granular filter material 34b is fluidized during this backwashing, the granular filter material 34b
The particles or the granular filter material 34b and the filter tube 34a rub against each other, and substances adhering during filtration are sufficiently removed.

Note that since this backwash water is clean water that has been newly filled in the bathtub 10, it does not contain any dirt components and can clean the filter 34 extremely well. In addition, there is no possibility that dirt components will flow out from the filter 34 into the bathtub 10 when filtration is started thereafter.

Furthermore, this backwashing is performed only immediately after (or during) filling with water, and is not performed during bathing.

Note that when filling the bathtub 10 with water, the three-way valve 26.
0 switching is performed. Then, when water gradually accumulates in the bathtub 10, the water in the bathtub 10 passes through the pipes 16.18b, 18c, and 30.32 to the filter 3.
4, and the air in the filter 34 instead flows into the pipe 4.
The water is discharged through 2.46, and the inside of the filter 34 is filled with water. Therefore, when the backwash operation is performed, the backwash starts immediately.

When discharging water from inside the bathtub 10, a three-way valve 26.
First, the selection of the flow path 40 is assumed to be that during the filtration operation shown in FIG. By doing this, the water level in the bathtub 10 will be lower than the spout 1.
When the air drops to the level of 22.3, the air
8.42 into the filter 34, and the water in the filter 34 is discharged into the bathtub 10 via the pipe 32.28.16. In addition to these pipes 32.28.16, water in the pipes 22.38.18b, 18c and the pump 18a is also discharged. When the drainage from inside the pump 18a is completed,
A signal is sent from a sensor 62 (not shown) provided on the pump 16a to a control device 66, and the control signal from the control device 66 automatically selects the backwash flow path shown in FIG. Valve 26.40 is switched. Then, the water remaining in the pipe 30.46 will also be quickly discharged.

In this way, when water is drained from the bathtub 10, the pump 1
Since water is drained from all the pipes in step 8a, it is possible to prevent dirt from adhering to the inner surfaces of the pump and pipes.

In the above explanation, the flow path for filtration operation is first selected, and then the flow path for backwash operation is selected. You may also select a route.

Furthermore, in the above explanation, when the sensor 62 of the pump 18a detects water removal, the flow path selection between filtration and backwashing is performed, but one of the filtration and backwashing is selected until the sensor 58 no longer detects water. The flow path may be selected in advance, and the other flow path may be selected when the sensor 58 no longer detects water.

[Effects] As described above, according to the bathtub filtration device of the present invention, when the water in the bathtub is drained, all the water remaining in the piping of the bathtub filtration device is discharged, thereby preventing dirt from forming on the inner surface of the piping, etc. Adhesion is prevented. Furthermore, no heater is required to prevent residual water from freezing.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of the device of the present invention, FIG.
The figure is an explanatory diagram of the operation. 10... Bathtub, 12... Living in Japan, 14...
・Return port, 18...pump device, 26...
Three-way valve, 34... Filter, 34a... Filter cylinder, 34b... Granular filter material, 40... Three-way valve.

Claims (1)

[Claims] A circulation system path equipped with a pump that extracts hot water from the bathtub and returns it to the bathtub, a filter provided in this circulation path, a filtration flow path selection for passing water in the filtration direction to the filter, and Water is drained from the bathtub in a bathtub filtration device having a flow path switching device that allows water to flow through the filter in the backwash direction and switches backwash flow path selection for discharging backwash wastewater to the outside of the circulation system path. A filtration device for a bathtub, characterized in that it is provided with a control device that operates a flow path switching device so as to select one of the filtration flow path and the backwash flow path and then select the other.