JPH0410893Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bathtub filtration device for filtering water (hot water or cold water) in the bathtub filtration device.

[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.
This backwash water is discharged outside the bathtub.

[Problems to be solved by the invention] Conventional filters use perforated plates, meshes, etc. as filter media, and there has been a problem in that even when backwashing is performed, clogging substances cannot be sufficiently removed.

[Means for Solving the Problems] 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 filtration system. 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 filter is characterized by having a filtration cylinder made of a hard porous body and a granular filtration material that flows during backwashing.

[Function] According to the bathtub filtration device of the present invention, the granular filter material flows during backwashing, and the granular filter materials or the granular filter material and the filter cylinder rub against each other, so that substances attached during filtration are reliably removed. Ru.

[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 side wall surface of the bathtub 10 is provided with an outlet 12 and a return outlet 14 for water in the bathtub. The outlet 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. A pump main body 18a is installed in the pump device 18, and is configured to suck water from an inlet 20 through a pipe 18b, and force-feed the water toward a discharge port 24 through a pipe 18c.

The suction port 20 and the discharge port 24 are formed into a three-way joint and a four-way joint, and the suction port 20 is connected to a first electric three-way valve 26 through a pipe 28. This three-way valve 26 is connected to the discharge port 2 via piping 30.
It is connected to 4. 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, heavy metal-supported granular material, 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
is connected to a filtrate water inlet 44 of the filter 34 via a short pipe 42. The three-way valve 40 is further connected to a pipe 46 for discharging backwash water.

Note that the bathtub filtration device according to this embodiment is the bathtub 1.
A nozzle device 48 for air mixing is provided at the connection portion of the return port 14 of the pipe 22, and this nozzle device 48 has a function for introducing air. Piping 52
is connected.

A switch 56 is provided on the handrail portion of the bathtub 10 to perform bubble ejection and filtration operations. A controller 58 is provided on the bathroom wall, and the controller 58 is provided with a backwash switch 60 and a backwash warning lamp 62.
This backwash warning lamp 62 is used to indicate that backwashing is to be performed when the filter 34 has filtered more than a predetermined amount of water. A flow meter 64 is provided in the middle of the pipe 38, and a detection signal from the flow meter 64 is input to a control device 66. Note that this flow meter 64 may be provided in the piping 28. The control device 66 is installed to be able to communicate signals with the controller 58, switch 56, pump device 18, and valves 26 and 40.

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

FIG. 2 shows channel 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,
The three-way valve 40 selects a flow path for communicating the pipe 38 and the pipe 42, respectively. After performing such flow path selection, the pump 18a is activated. Then,
The water in the bathtub 10 extends from the outlet 12 to the piping 16 and the inlet 20, and further to the piping 18b and the pump body 18.
a, reaches the discharge port 24 via the pipe 18c. A required proportion of the water that has reached the discharge port 24 returns from the pipe 22 to the bathtub 10 via the return port 14. The remainder of the water that has reached the outlet 24 flows into the filter 34 via the pipes 38 and 42. After being filtered by the granular filter material 34b inside the filter 34, the water passes through the filter tube 34a, reaches the filtrate outlet 36, and reaches the suction port 20 from the pipes 32, 28. Then, the suction port 20 reaches the discharge port 24 through the pipe 18b, pump 18a, and pipe 18c in the same manner as described above.

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

Note that when the switch 56 is operated, air is introduced from the pipe 52 into the nozzle device 48, and air bubbles are mixed into the water spouted from the return port 14. Therefore,
The bubble jetting operation will be performed in parallel with the filtration process.

FIG. 3 shows flow path selection when performing a backwash operation. That is, when the backwash switch 60 is pressed, the three-way valve 26 connects the pipes 30 and 32, and the three-way valve 40 connects the pipes 42 and 46. After performing such flow path selection, the pump 18a is activated. Then, the water in the bathtub 10 reaches the inlet 20 via the outlet 12 and the pipe 16, and further reaches the discharge port 24 via the pipe 18b, the pump 18a, and the pipe 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 pipes 30 and 32.
The filtered water is then introduced into the filter 34 from the filtrated water outlet 36. 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. Thereafter, the water is discharged through the inlet 44 and the pipes 42 and 46. In this way, during backwashing, the granular filter media 34b is fluidized, so that the granular filter media 34b rub against each other, or the granular filter media 34b and the filter media 34a rub against each other, and substances adhering during filtration are sufficiently removed. It becomes like this.

In addition, when introducing water into the bathtub 10 (filling with hot water), the three-way valves 26 and 40 are switched so as to select the flow path during backwashing as shown in FIG. 3 above. Then, as the water gradually accumulates in the bathtub 10, the water in the bathtub 10 flows through the pipe 1.
6, 18b, 18c, 30, 32 to filter 3
Instead, the air inside the filter 34 is discharged through the pipes 42 and 46, and the inside of the filter 34 is filled with water. Therefore, water is immediately circulated when the filtration operation is performed.

When discharging water from the bathtub 10, the flow path selection of the three-way valves 26 and 40 is as shown in FIG. 2 during the filtration operation. If you do this, bathtub 1
When the water level in the outlet 12 drops to the level in the outlet 12, air enters the filter 34 through the pipes 22, 38, and 42, and the water in the filter 34 flows into the pipe 3.
2, 28, and 16, and is discharged into the bathtub 10.
When drainage is completed, the two-way valves 26 and 40 are automatically switched to select the flow path shown in FIG. 3, and the bathtub 10 is in a standby state for the next filling of hot water.

As described above, when the cumulative amount of water flowing into the filter 34 exceeds a predetermined amount by continuing the filtration operation for a predetermined period of time, the warning lamp 62 lights up, indicating that backwashing should be performed.

The apparatus of the present invention is preferably configured so that the backwash operation is automatically stopped when a predetermined period of time has elapsed after the start of the backwash operation.

[Effects] As described above, according to the bathtub filtration device of the present invention, the granular filter material is fluidized during backwashing, and substances adhering to the filter material can be sufficiently removed. Therefore, sufficiently clean filtered water can be obtained during filtration operation. It also extends the life of the filter.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a device according to an embodiment of the present invention, and FIGS. 2 and 3 are diagrams illustrating its operation. 10... Bathtub, 12... Exit, 14... Return exit,
18... Pump device, 26... Three-way valve, 34...
Filter, 34a...filter cylinder, 34b...granular filter material, 40...three-way valve.

Claims (1)

[Scope of utility model registration request] 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 A bathtub filtration device having a flow path switching device for switching backwash flow path selection for passing water through the filter in the backwash direction and discharging backwash wastewater to the outside of the circulation system, wherein the filter is a hard porous filter. A filtration device for a bathtub, characterized in that it has a filtration cylinder made of a body and a granular filtration material that flows during backwashing.