JPH0429848Y2 - - 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 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 from the bathtub is used as this backwash water.
In addition, backwash water is discharged outside the bathtub.

Conventional mechanisms for performing backwashing are 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 the case of a device that performs backwashing when the cumulative amount of filtration flow reaches a predetermined amount, backwashing may suddenly start during bathing, surprising the bather, or causing the bathtub to collapse. There was a problem where the amount of hot water inside the tank suddenly started to decrease.
(As mentioned above, the hot water in the bathtub is used as the water for backwashing.) Also, since the water for backwashing is the hot water in the bathtub, if the hot water in the bathtub is dirty, There is a possibility that the filter medium cannot be backwashed sufficiently. Furthermore, there is a risk that dirt components in the bathtub may be captured by the filter medium during backwashing, and the dirt components may flow back into the bathtub during the next filtration.

[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. A filtration device for a bathtub having a switching device, characterized in that it is equipped with a water filling detector in the bathtub and a control device that operates the pump and flow path switching device to perform backwashing when water filling is detected. It is.

[Function] According to the bathtub filtration device of the present invention, as soon as the bathtub is filled with water, backwashing is performed using fresh and clean water in the bathtub. Therefore, backwashing is performed to ensure that the filter media is sufficiently clean. Further, dirt components do not adhere to the filter medium during backwashing, and dirt components do not flow back into the bathtub during the next filtration.

In addition, with the device of this invention, backwashing is performed only when water is filled, and backwashing does not suddenly start during bathing, which may surprise the bather or cause the water level in the bathtub to drop during bathing. There's nothing to do.

[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 a three-way joint and a four-way joint, and the suction port 20 is connected to a first electric three-way valve 26 with 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 into the water. Piping 52
is connected.

A switch 56 is provided on the handrail portion of the bathtub 10 to perform bubble ejection and filtration operations. Detection sensors 5 are installed at the bottom and sides of the bathtub 10.
8, 60 are provided, and these sensors 58, 60
The detection signal is input to the control device 66. The control device 66 is installed to be able to communicate signals with the switch 56, the pump device 18, and the valves 26, 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 body 18a is activated. Then, the water in the bathtub 10 reaches the outlet 12, the pipe 16, the suction port 20, and further reaches the discharge port 24 via the pipe 18b, the pump body 18a, and the pipe 18c. A required proportion of the water that has reached the discharge port 24 is transferred to the pipe 22.
From there, it returns to the inside of the bathtub 10 via the return port 14. Discharge port 2
The remainder of the water that has reached the filter 4 flows into the filter 34 via the pipes 38 and 42. After being subjected to filtration treatment by the granular filter material 34b in the filter 34,
The water passes through the filter cylinder 34a and reaches the filtrate outlet 36, and then reaches the suction port 20 through the pipes 32 and 28. Then, from this suction port 20, the pipe 18 is connected in the same manner as described above.
b, reaches the discharge port 24 through the pump body 18a and the piping 18c.

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.

(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. Instead of using a detection sensor, water filling may be detected by using a water level sensor that detects the water level in the bathtub.Furthermore, 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 the required time in the following manner according to a control signal from the control device 66. First, the three-way valve 26 is connected to the pipes 30, 3
The three-way valve 40 connects the pipes 42 and 46. After performing such flow path selection, the pump body 18a is operated. 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 body 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 remainder of the water that has reached the discharge port 24 from the pipe 18c is introduced into the filter 34 from the filtered water outlet 36 via the pipes 30 and 32. After this water further passes through the filter cylinder 34a, it enters the packed bed of the granular filter material 34b, and the granular filter material 34
The packed bed of b is fluidized. After that, the water is inlet 4
4. It is discharged through pipes 42 and 46. In this way, since the granular filter material 34b is fluidized during this backwashing, the granular filter materials 34b rub against each other, or the granular filter material 34b and the filter cylinder 34a rub against each other, and the substances attached during filtration are sufficiently removed. It becomes like this.

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.

In addition, when filling the bathtub 10 with 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 pipes 16, 18b, 18.
c, 30, 32 and flows into the filter 34,
Instead, the air inside the filter 34 is exhausted through the pipes 42 and 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 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 the drainage is completed, the valves 26 and 40 are automatically switched to select the flow path shown in FIG.
A standby state is established for filling the bathtub 10 with water next time.

[Effects] As described above, according to the bathtub filtration device of the present invention, backwashing is performed using clean water, so that substances adhering to the filtering material can be sufficiently removed. Therefore, no dirt components flow into the bathtub at the start of filtration operation, and sufficiently clean filtered water can always be obtained. In addition, this backwashing is performed when water is filled (during or immediately after filling the bathtub), and backwashing may suddenly start while taking a bath, or the water level in the bathtub may drop due to backwashing while taking a bath. There's nothing to do.

[Brief explanation of the drawing]

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 switcher 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, the bathtub water filling detector and A filtration device for a bathtub, comprising a control device that operates a pump and a flow path switch to perform backwashing when water filling is detected.