JPH0713772Y2 - Bathtub filtering device - Google Patents

Description

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

[Prior Art] In this type of bathtub filtering device, the water in the bathtub is introduced into the filter by a pump to return the filtered water to the bathtub. Since the filter material is clogged with the continuation of the filtration operation, backwashing is performed as necessary. This backwash drainage is discharged outside the bathtub.

[Problems to be Solved by the Invention] A conventional filter uses a perforated plate or a mesh as a filter medium, and there is a problem that the clogging substance cannot be sufficiently removed even by backwashing.

[Means for Solving the Problem] A bathtub filtering device of the present invention is for a bathtub having a circulation passage with a pump in the bath and extracting the hot water from the bathtub again, and a filter provided in the circulation passage. In the filtering device, the filter is provided with a filter cylinder made of a hard porous body coaxially inside a cylindrical filter body whose cylinder axis direction is a vertical direction, and between the filter body and the filter cylinder. It is loaded with granular filter material that flows during backwashing, and the filtered water is introduced into the filter body from the upper part of the filter body, passes through the filter tube from the granular filter material, and is then discharged from the lower part of the filter tube. The backwash water is introduced into the filter cylinder downward from the upper part of the filter cylinder,
After passing through the filter cylinder and the granular filter material, it is discharged from the upper part of the filter body.

[Operation] According to the bathtub filtering device of the present invention, the granular filter medium flows during the backwash and the granular filter medium or the granular filter medium and the filter cylinder rub against each other, so that the substances adhering during the filtration are well removed. . In the present invention, since the backwash water is introduced into the filter cylinder from the upper part of the filter cylinder downward, most of the backwash water permeates the lower part of the filter cylinder.
For this reason, the layer of the granular filter medium is allowed to flow strongly as a whole, so that the adhered substances can be removed reliably and sufficiently.

Embodiments Embodiments 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 has a water outlet 12 and a water outlet in the bathtub.
14 are provided. The outflow port 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 discharge port 24 of the pump device 18 via a pipe 22. A pump body 18a is installed in the pump device 18, and the suction port 2
The pipe 18b is configured to suck water from 0, and the pipe 18c is configured to pump the water toward the discharge port 24.

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 filtered water discharge port 36 of a filter 34 via a pipe 28 with an electric two-way valve 26. There is.

The filter 34 includes a filter cylinder 34a made of a hard porous material coaxially inside a filter body (casing) 34A with the cylinder axis direction up and down.
Is installed. The ceiling of the filter cylinder 34a is closed by a lid 34G. The inside of the filter 34 is the filter cylinder 34a.
And the lid 34G divides the chamber into two chambers, and the inside of the filter cylinder 34a communicates with the discharge port 36. Between the filter tube 34a and the filter body 34A, a ceramic such as alumina, activated carbon,
The granular filter material 34b is filled with a heavy metal-supporting granular material or the like.

The discharge port 24 is connected to an electric three-way valve 40 via pipes 38 and 39. The three-way valve 40 is connected to a filtered water receiving port 44 of the filter 34 via a short pipe 42. The three-way valve 40 is further connected with a pipe 46 for discharging backwash drainage.

The pipe 38 is branched into a pipe 50 and the pipe 39, and an electric two-way valve 51 is provided in the middle of the pipe 50. Plumbing 50
The tip of is penetrated through the canopy portion of the filter body 34A and inserted into the filter 34, and is connected to the opening 34H of the lid 34G.

Incidentally, the bathtub filtering device according to the present embodiment also serves as a bubble jetting device for blowing bubble-containing water into the bathtub 10, and a nozzle device for mixing air in the return port 14 connection portion of the pipe 22.
48 is provided, and an air introducing pipe 52 is connected to the nozzle device 48.

A switch 56 for ejecting bubbles and performing a filtering operation is provided on the handrail portion of the bathtub 10. A controller 58 is provided on the wall surface of the bathroom, and the controller 58 is provided with a backwash switch 60 and a backwash warning lamp 62. The backwash warning lamp 62 is for displaying that the backwash should be backwashed when the filter 34 has filtered a predetermined amount of water or more. A flow meter 64 is provided in the middle of the pipe 39, and a detection signal of the flow meter 64 is input to the control device 66. In addition,
The flow meter 64 may be provided in the pipe 28. Controller 66
Is a controller 58, a switch 56, a pump device 18, a valve 26,
It is installed so that signals can be transmitted between 40 and 51.

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

FIG. 2 shows the flow path selection when the filtration operation is performed. That is, when the switch 56 is pressed, the two-way valve 26 is opened, and the three-way valve 40 selects the flow path that connects the pipe 39 and the sad feeling 42. Further, the two-way valve 51 is closed. After performing the flow path selection, the pump body 18a operates. Then, the water in the bathtub 10 will pass from the outlet 12 through the pipe 16 to the inlet.
20 and further reaches the discharge port 24 through the pipe 18b, the pump main body 18a, and the pipe 18c. The 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. Outlet
The rest of the water reaching 24 is filtered through pipes 38, 39 and 42.
Pour into 34. Then, the granular filter material 34b in the filter 34
After having been subjected to a filtration process by, it passes through the filtration cylinder 34a, reaches the filtered water discharge port 36, and reaches from the pipe 28 to the suction port 20. Then, from the suction port 20 to the discharge port 24 through the pipe 18b, the pump body 18a, and the pipe 18c in the same manner as described above.

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

When water flows in the nozzle device 48, air is introduced from the pipe 52 into the nozzle device 48, and bubbles are mixed in the water ejected from the return port 14. Therefore, the bubble jetting operation is performed in parallel with the filtering process.

FIG. 3 shows the flow path selection when performing the backwash operation. That is, when the backwash switch 60 is pressed, the two-way valve 26 is closed,
The three-way valve 40 connects the pipes 42 and 46. Also, the two-way valve 51 opens. After performing such flow path selection, the pump body 18a
Is activated. Then, the water in the bathtub 10 reaches the suction port 20 through the outflow port 12 and the pipe 16, and further reaches the discharge port 24 through the pipe 18b, the pump body 18a, and the pipe 18c. Of the water reaching the discharge port 24, a required proportion returns to the bathtub 10 from the pipe 22. Bubbles are also ejected during this backwashing operation.
The remaining water from pipe 18c to outlet 24 is pipe 3
It is introduced downward from the opening 34H into the filter tube 34a through 8,50. The water further passes through the filter cylinder 34a, and then enters the packed bed of the granular filter material 34b to cause the packed bed of the granular filter material 34b to flow. Then, the water is discharged through the receiving port 44 and the pipes 42 and 46. In this way, since the particulate filter medium 34b is flowed during this backwash, the granular filter medium 34b or the granular filter medium 34b and the filter tube 34a rub against each other, and the substances attached during filtration are sufficiently removed. Like

Particularly, in this embodiment, the backwash water is introduced into the filter cylinder 34a downward from the opening 34H. Then, the backwash water flow flows downward in the filter cylinder 34a and hits the bottom surface portion of the filter main body 34A to change the flow laterally. Therefore, most of the backwash water introduced into the filter cylinder 34a through the opening 34H will pass through the lower portion of the filter cylinder 34a. As a result, a large amount of backwash water is introduced into the lower part of the packed bed of the granular filter material 34b, so that the bed of the granular filter material 34b as a whole flows strongly and the backwash efficiency is increased. Is extremely high.

As described above, when the cumulative amount of water flowing through the filter 34 becomes equal to or larger than the predetermined amount by continuing the filtration operation for the predetermined time, the warning lamp 62 is turned on and it is displayed that backwashing should be performed.

In the device of the present invention, it is preferable that the backwashing operation is automatically stopped when a predetermined time has elapsed after the backwashing operation was started.

[Effects] As described above, according to the bathtub filtering apparatus of the present invention, the granular filter medium is strongly fluidized during backwashing, and the substances adhering to the filter medium are sufficiently removed. Therefore, it is possible to obtain sufficiently clean filtered water during the filtering operation. In addition, the life of the filter medium is extended.

[Brief description of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 and FIG.
The figure is a diagram for explaining the operation. 10 ... Bathtub, 12 ... Outgoing port, 14 ... Return port, 18 ... Pump device, 26 ...
Two-way valve, 34 ... filter, 34a ... filter cylinder, 34b ... granular filter material,
40 ... Three-way valve.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location B01D 29/66 35/147 35/16 7305-4D F24H 9/00 W 7112-4D B01D 29/38 510 B 7305 -4D 35/14 101

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A bathtub filtering apparatus comprising a circulation system passage with a pump for extracting hot water from the bathtub and returning it to the bathtub, and a filter provided in the circulation system passage, wherein the filtration device is in the cylinder axis direction. A filter cylinder made of a hard porous material is coaxially provided inside a cylindrical filter body having a vertical direction, and a granular filter material that flows during backwash is loaded between the filter body and the filter cylinder. The water to be filtered is introduced from the upper part of the filter body into the filter body, passes through the filter cylinder from the granular filter material, and is then discharged from the lower part of the filter cylinder, and the backwash water is discharged from the upper part of the filter cylinder. A filter device for a bathtub, which is introduced downward into the filter cylinder, passes through the filter cylinder and the granular filter material, and is then discharged from the upper part of the filter body.