JPH0994415A - Filter device for bathtub water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute the device in such a manner that back washing is executed right after a filtration operation or jet operation of switch operation. SOLUTION: The backward washing is executed for the prescribed time by the control signal from a controller 60 right after the stop of the jet operation or filtration operation or after lapse of the prescribed time (for example, 30 minutes). The water in a bathtub 10 arrives through a forward port 12 and a piping 16 at a suction port 20 and further arrives at a discharge port 24 through a piping 18b, a pump body 18a and a piping 18c. The prescribed ratio of the water arrived to the discharge port 24 returns to the bathtub 10 from a piping 22. The remaining part of the water arriving at the discharge port 24 from the piping 18c is introduced through pipings 30, 32 from a filtered water discharge port 36 into a filter device 34. The water is thereafter discharged through an accepting port 44 and pipings 42, 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device for filtering bath water, and more particularly to a filtering device for bath water with improved backwash timing of the filter.

[0002]

2. Description of the Related Art In a bath water filtering apparatus in which bath water is filtered by a filter and returned to the bath, the filter is backwashed for a predetermined time immediately after the filtration operation switch of the filter is operated, and then It is known to shift to a filtration operation (Japanese Utility Model Publication No. 4-888). According to this filtration device,
Since the backwashing is automatically performed prior to the filtration operation, the backwashing is not forgotten, and it is possible to prevent dusts, stains, etc. from being left on the filter medium for a long time and sticking to the filter medium.

[0003]

The above-described conventional bath water filtering device has the following disadvantages.

When the bather notices the dirt in the bath water and presses the filtration switch, the back water level is lowered because the back washing is always performed first automatically.

After the filtration operation is completed, there may be a time delay (for example, one day elapses) before the next filtration operation.
During this period, the deposits on the surface of the filter medium may be fixed to the filter medium and may not be removed even by backwashing.

In the case of a filter attached to a bubble ejecting device, in a device in which the filtering operation is performed concurrently when the bubble ejecting operation (jet operation) is performed, the jet operation switch is provided. When pressed, the filter will be backwashed first, and after this backwashing, the jet will be operated, so it will take more time from when the jet operating switch is pressed until the jet is actually operated. Or, it may be mistaken for a failure.

[0007]

The bath water filtering apparatus of the present invention is designed so that backwashing is automatically performed after the filtration operation is completed, and dusts and the like adhering during the filtration operation are immediately removed. It Further, when the filtration operation switch is operated, the filtration operation is immediately performed, and at this time, the bath water level does not decrease.

This backwashing may be carried out immediately after the completion of the filtration operation, or after a lapse of a predetermined time.

When the filtration operation switch is operated during the backwash operation, the filtration operation may be started immediately, or the filtration operation may be started after the backwash operation is completed.

In the present invention, the backwashing may be automatically performed when a predetermined time has passed since the last backwashing.

In the present invention, the backwash operation may not be performed until a predetermined time has elapsed since the last backwash. This prevents the backwash frequency from becoming excessively high.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of a bathtub filtering device according to an embodiment of the present invention. The side wall of the bathtub 10 is provided with an outflow port 12 and a return port 14 for water in the bathtub. Gateway 12
Is connected to a suction port 20 of a pump device 18 via a pipe 16. The return port 14 is connected to the pump device 1 via the pipe 22.
8 discharge ports 24. A pump main body 18a is installed in the pump device 18, and is configured to suck water from the suction port 20 through the pipe 18b and pump the water toward the discharge port 24 through the 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 the first electric three-way valve 26 by a pipe 28. The three-way valve 26 is connected to the discharge port 24 via a pipe 30. Further, the three-way valve 26 is connected to the filter 3 through the pipe 32.
4 to the filtered water discharge port 36. 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 outer side of the filter cylinder 34a is filled with a granular filter material 34b made of ceramic such as alumina, activated carbon, or a heavy metal-supporting granular material.

The discharge port 24 is connected to a second electric three-way valve 40 via a pipe 38. The three-way valve 40 is connected to a filtered water inlet 44 of the filter 34 via a short pipe 42. A pipe 46 for draining backwash drainage is further connected to the three-way valve 40.

This bathtub filtering device also serves as a bubble jetting device for jetting bubble-containing water into the bathtub 10, and a nozzle device for aeration is provided at the connection portion of the return port 14 of the pipe 22. 48 is provided and an air introducing pipe 52 is connected to the nozzle device 48.
The pipe 52 is provided with an electric two-way valve 52a for controlling air inflow.

A jet operation switch 58 for ejecting bubbles and a filtration operation switch 56 are provided on the handrail portion of the bathtub 10. The control device 60 is installed so that signals can be transmitted to the switches 56 and 58, the pump device 18, and the valves 26, 40 and 52a.

The operation of the thus constructed bathtub filtering device will be described.

FIG. 2 shows the flow path selection when the jet operation or the filtration operation is performed.

When the jet operation switch 58 is pressed, the three-way valve 26 connects the pipe 32 and the pipe 28, and the three-way valve 40
Selects the flow path that connects the pipe 38 and the pipe 42. Also, the two-way valve 52a opens. After performing the flow path selection, the pump main body 18a operates.

Then, the water in the bathtub 10 reaches from the outlet 12 to the pipe 16 and the suction port 20, and further to the discharge port 24 via the pipe 18b, the pump body 18a and the pipe 18c.
A portion of the required ratio of water that has reached the discharge port 24 returns from the pipe 22 to the inside of the bath 10 through the return port 14. The rest of the water that has reached the discharge port 24 flows into the filter 34 through the pipes 38 and 42. Then, after being filtered by the granular filter material 34b in the filter 34, it passes through the filter cylinder 34a, reaches the filtered water discharge port 36, and reaches the suction port 20 from the pipes 32 and 28. Then, from the suction port 20 to the pipe 1 as described above.
8b, pump main body 18a, pipe 18c through discharge port 2
Up to 4.

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

When water flows in the nozzle device 48 with the two-way valve 52a opened, the nozzle device 4 is discharged from the pipe 52.
Air is introduced into 8, and bubbles are mixed in the water ejected from the return port 14. Therefore, the bubble jetting (jet) operation is performed in parallel with the filtering process. Even when the filtering operation switch 56 is operated, the same operation as the jet operation is performed except that the two-way valve 52a is closed, and the filtering operation is executed. In this case, since the two-way valve 52a is closed, no bubbles are ejected.

The jet operation or the filtration operation may be automatically stopped after a predetermined time, or may be stopped by operating the stop switch.

FIG. 3 shows the flow path selection when the backwash operation is performed.

The above jet operation or filtration operation is stopped (automatic stop or stop by operation of a stop switch)
In this case, immediately or when a predetermined time T ₁ (for example, 30 minutes) has elapsed, backwashing is performed for a predetermined time in the following manner by a control signal from the control device 60. First, the three-way valve 26 connects the pipes 30 and 32, and the three-way valve 40 connects the pipe 4
Connect 2 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, the pipe 16, and further reaches the outlet 24 via the pipe 18b, the pump body 18a, and the pipe 18c. Of the water reaching the discharge port 24, a required proportion of the water returns from the pipe 22 to the bath 10. The two-way valve 52a is closed during the backwash operation. Piping 1
The remaining water from 8c to the discharge port 24 is pipe 3
It is introduced into the filter 34 from the filtered water discharge port 36 through 0 and 32. After this water further passes through the filter cylinder 34a,
The granular filter material 34b enters into the packed bed, and the granular filter material 34b
Fluidize the packed bed of b. Then, the water is discharged through the receiving port 44 and the pipes 42 and 46.

In this way, since backwashing is carried out immediately or within a short time after the end of the jet or filtration operation, the substances adhering during filtration can be sufficiently removed. Further, when the jet operation switch 58 is operated, the jet operation starts immediately, which is comfortable. Further, even if the jet operation switch 58 or the filtration operation switch 56 is operated, the water level in the bathtub 10 does not immediately drop.

In the embodiment of the present invention, the control device 60 is provided with a timer, and after the backwash operation is completed, this timer is activated to automatically perform the backwash after a predetermined time T ₂ (for example, 6 hours) has elapsed. You may do it. If the switch 56 or 58 is operated during the lapse of the timer, the timer is reset.

In the above embodiment, 30 is set as T _1.
Although 6 minutes are illustrated as minutes and T ₂ , this is an example and other times may be used. Preferred T ₁ is 5
Is 60 minutes, T ₂ is a 2 to 8 hours.

In the embodiment of the present invention, the control device 60 is provided with another timer, and after the backwash operation is finished, this timer is operated to perform backwash until a predetermined time T ₃ (for example, 6 hours) elapses. It may not be performed. This prevents the filter 34 from being backwashed too frequently. That is, in the case of a filtration device configured to automatically backwash each time the jet operation or the filtration operation is completed, for example, four people take a bath per day and each person performs the jet operation or the filtration operation, respectively. In that case, it will be backwashed four times that day. However, backwashing does not have to be performed so frequently, and once a day is often sufficient.

In a normal household, the bath is completed before PM7 to AM1. Therefore, it is preferable not to carry out the backwash within 6 hours after the end of the last backwash. The predetermined time T ₃ of 6 hours is an example, and may be appropriately selected according to the family structure, lifestyle, and the like. In general, T ₃ is preferably selected from between 4-8 hours.

[0032]

As described above, the bath water filtering apparatus of the present invention is such that the filter is backwashed after the filtering operation is completed, and the filtering operation and the jet operation are performed immediately after the switch operation. In addition, the water level of the bathtub is not lowered, and it is comfortable for the user, and does not cause misidentification such as failure. In addition, since the dust and the like adhering to the filter medium during the filtration operation is removed by backwashing before being fixed, the filter medium can be kept clean for a long period of time.

[Brief description of drawings]

FIG. 1 is a system diagram of a bath water filtering device according to an embodiment.

FIG. 2 is a system diagram during jet operation of the bath water filtering device according to the embodiment.

FIG. 3 is a system diagram during a backwash operation of the bath water filtering apparatus according to the embodiment.

[Explanation of symbols]

 10 Bathtub 12 Outlet port 14 Return port 18 Pump device 18a Pump body 26,40 Three-way valve 34 Filter 34a Filter tube 34b Granular filter material 48 Nozzle device 52a Two-way valve 56 Filtration operation switch 58 Jet operation switch

Claims (6)

[Claims] 1. A filtering operation is performed in which bath water is received by a filter and filtered, and then returned to the bath, and bath water is passed through the filter in a direction opposite to that at the time of filtration to backwash the water. 1. A bath water filtering apparatus for performing backwashing operation, which discharges wash water to the outside of a bathtub, wherein the backwashing operation is performed immediately after the filtration operation is stopped. 2. The bath water is received in a filter, filtered, and then returned to the bath, and the bath water is passed through the filter in a direction opposite to that at the time of filtration to backwash the water. A bath water filtering device for performing backwash operation for discharging wash drainage to the outside of a bathtub, wherein the backwashing operation is performed after a predetermined time has elapsed after stopping the filtration operation. . 3. The apparatus for filtering bath water according to claim 1, wherein when a signal for performing a filtration operation is given during the backwash operation, the filtration operation is immediately performed. 4. The apparatus for filtering bath water according to claim 1 or 2, wherein when a signal to perform a filtration operation is given during the backwash operation, the filtration operation is performed as soon as the backwash operation is completed. 5. The bath water filtering device according to claim 1, wherein the backwash operation is performed when a predetermined time has elapsed since the last backwashing. 6. The apparatus for filtering bath water according to claim 1, wherein the backwash operation is not performed until a predetermined time has elapsed since the last backwashing.