JPH05317617A - Bathtub filter - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a filtration device capable of satisfactorily exhausting air in a filter or the like to the outside when water is filled in a bathtub. A bathtub 1 having a filtering device in which a pump 6 and a filter 10 are connected to each other by a pipe line is provided with a water level detector 16 for detecting the start of water filling and a water level detector 17 for detecting the end of water filling. A control device 18 is provided to open the upper three-way valve 9 of the filter 10 to the discharge pipe 13 side and to close the upper three-way valve 9 when water filling is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub filtration device.

[0002]

2. Description of the Related Art Conventionally, a filtering device for a bathtub has a structure as shown in FIG. 4 and FIG. 5, and a side wall of the bathtub 1 has a suction port 2 and an upper part thereof. A jet port 3 is formed in the suction port 2, a first pipe 5 is connected to the suction port 2, the first pipe 5 is connected to a pump 6, and the pump 6 has a second pipe communicating with the jet port 3. A pipe 7 is connected, and a third pipe 8 is branched from the second pipe 7 and a filter 10 is connected to the third pipe 8 via an upper three-way valve 9. A discharge pipe 13 extending to the outside is connected to the upper three-way valve 9. Further, a fourth pipe 11 is connected to the third pipe 8 in a branched manner, a lower three-way valve 12 is provided on the fourth pipe 11, and the lower three-way valve 12 is used for the filter 1.
It is connected to the bottom of 0. The end of the fourth pipe 11 is connected to the first pipe 5. Also, the filter 10
A cylindrical filter cylinder 14 is erected therein, and a granular filter medium 15 is enclosed in the filter 10.

In such a structure, during normal filtration operation, as shown in FIG. 4, the hot water sucked from the suction port 2 to the first pipe 5 passes through the second pipe 7 by the pump 6 and the jet port 3
Is jetted into the bathtub 1 from this, and at this time, air is mixed from the air suction portion 4 and bubbles are emitted from the jet outlet 3.
Further, a part of the hot water flows through the third pipe 8 into the filter 10 from the upper three-way valve 9, is filtered in the filter 10 and returns to the first pipe 5 through the fourth pipe 11 to be pumped. It is pressure-fed by 6 and ejected from the ejection port 3. When the filtration operation as shown in FIG. 4 is continued as described above, the filter 10 is clogged, and therefore the backwash operation as shown in FIG. 5 is periodically performed by the timer or the operation of the backwash operation switch. That is, at the time of backwashing in FIG. 5, a part of the hot water flows from the third pipe 8 to the fourth pipe 11 into the filter 10 from the lower three-way valve 12, and the hot water flows from the bottom to the top of the filter 10. The filter cylinder 14 and the filter material 15 in the filter 10 are washed upward and are discharged from the upper three-way valve 9 through the discharge pipe 13 to the outside.

In such a bathtub filtering apparatus, when the bathtub 1 is not filled with water, the bathtub is normally held in a filtration channel selection position where the filtration operation is possible as shown in FIG. When the start is started, water gradually starts to enter the pump 6 and the like from the suction port 2 and the air in the pipeline exits from the jet port 3, but the water level in the bathtub 1 gradually rises, and the portion of the jet port 3 If it is blocked with water, there will be no air outlet, and no more water will enter the filter 10 and the pipeline. When the water filling is finished and the filtration operation is started in such a state, the pump 6 sucks a large amount of air remaining in the filter 10 and the pipe line, and the pump 6 can circulate the water. There is a problem that the pump 6 is adversely affected such as disappearance, and the pump 6 emits a large noise.

Further, due to the air remaining in the filter 10, the water sent from the pump 6 to the filter 10 directly hits the filter medium 15 with a strong pressure, and the filter medium 15 is unevenly distributed in the filter 10 due to the water pressure. There are problems that the particles are scattered and the filtration efficiency is reduced. In order to satisfactorily extract the air in the filter 10, a method of attaching an air bleeding valve to the filter 10 may be considered, but if such an air bleeding valve is attached, the cost rises and, at the time of backwashing, Filter material 15
Is lifted up and bites into the air bleeding valve, and the air bleeding valve is broken.

[0006]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems of the prior art, and does not provide a filtering device capable of satisfactorily discharging air in a filter or the like when water is filled. The first gist of the invention is to provide a circulation path with a pump for extracting hot water from the bathtub and returning it to the bathtub again, a filter provided in the circulation path, and water passing through the filtration direction in the filtration direction. In the filtration device for a bathtub, which is provided with a switching valve for selecting a filtration flow path for performing the above-mentioned operation and selecting the back-wash flow path for passing backwash water to the outside of the circulation path by passing water in the backwash direction to the filter, Start detection means for detecting the start of water filling to the bathtub, and end detection means for detecting the end of water filling in the bathtub, and in the state where the switching valve is held at the filtration flow path selection position, the start detection means is Switching when the start of water filling is detected Together with switching to the reverse flow path selection position, the end detection means is further comprising: a controller for controlling to switch the switching valve to the filtered flow path selected position upon detection of water filling terminates. Also, the second
The gist of is that the circulation path with a pump that draws hot water from the bathtub and returns it to the bathtub again, the filter provided in this circulation path, and the selection of the filtration channel that allows water to flow through the filtration direction in the filtration direction. In the bathtub filtering device equipped with a switching valve that switches backwash flow passage selection for passing backwash water to this filter and discharging backwash drainage to the outside of the circulation path, the hot water in the bathtub has been discharged. A discharge detecting means for detecting that the bathtub is filled with water, and an end detecting means for detecting that the water filling in the bathtub is completed. When the discharge detecting means detects that hot water in the bathtub has been discharged, the switching valve is turned on. It is provided with a control device for switching to the backwash flow passage selection position and for controlling the switching valve to switch to the filtration flow passage selection position when the end detection means detects the end of water filling.

[0007]

In the first aspect, when the start detection means detects the start of water filling while the switching valve is held at the filtration flow path selection position, the switching valve moves to the backwash flow path selection position via the control device. By switching, the filter is in communication with the outside air, and the air in the filter is satisfactorily discharged to the outside when water is filled. Further, when the end detection means detects the end of water filling, the control device switches the switching valve to the filtration flow path selection position, so that the filter is shut off from the outside air, and in the subsequent filtering operation, water is not stored in the filter. Since it is full, good filtration operation is performed. In the second aspect, when the discharge detecting means detects that the hot water in the bathtub has been discharged, the control device switches the switching valve to the backwash flow passage selecting position, so that the hot water in the bathtub is discharged. In this state, the filter is kept in communication with the outside air, and when the water filling in the bathtub is started after that, the air in the filter can escape to the outside satisfactorily, and the water in the filter remains. Filled well. Further, when the end detection means detects the end of water filling in the bathtub, the control device switches the switching valve to the filtration flow path selection position to shut off the filter from the outside air, so that the subsequent filtering operation is performed well. Be seen.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a filtering device in a state where water filling into the bathtub 1 is started. In this example, a water level detector 16 is provided on the first pipe 5, and a water level detector 17 is also provided on the upper part of the filter 10, and each water level detector 16,
17 is connected to the control device 18. The controller 18 is also connected to the upper three-way valve 9 and the lower three-way valve 12, and is also electrically connected to the pump 6. Furthermore, an operation switch 19 and a backwash switch 20 are connected to the control device 18.

In such a structure, when water filling in the bathtub 1 is started and the water level in the bathtub 1 rises, the suction port 2
From the first pipe 5 and pump 6 into the first pipe 5
The water level detector 16 provided in the control unit 18 outputs a detection signal to the control unit 18, and the control unit 18 switches the upper three-way valve 9 to the state shown in FIG. 2 based on this signal. That is, FIG.
In this state, the upper three-way valve 9 is opened to the discharge pipe 13 side. Therefore, the water in the bathtub 1 can satisfactorily flow into the filter 10, and even when the ejection port 3 is blocked by the water, the water satisfactorily flows into the filter 10 and the The air remaining in 10 passes through the discharge pipe 13 from the upper three-way valve 9 and is released to the outside.

When the water level further rises and the filter 10 is filled with water, the water level detector 17 detects this state and outputs a detection signal to the control device 18, which receives the signal. The upper three-way valve 9 is switched to the state shown in FIG. In this state, the upper three-way valve 9 is held in a state where the discharge pipe 13 side is closed. Therefore, the water is not discharged from the discharge pipe 13 to the outside, and the water is well filled in the bathtub 1. When the operation switch 19 is turned on in the state of FIG. 3, as described above, the water in the bathtub 1 is pressure-fed by the pump 6 from the suction port 2 through the first pipe 5 to the jet port 3 from the second pipe 7. A part of the water flows through the third pipe 8 into the filter 10 from the upper three-way valve 9 and is washed in the filter 10 and then passes through the lower three-way valve 12 into the first pipe 5. Will be returned.

In this embodiment, since the inside of the filter 10 is filled with water during this filtering operation, the pump does not suck a large amount of air and generate noise as in the conventional case, and the water is circulated favorably. Furthermore, a uniform filtering effect can be obtained without the filter material 15 in the filter 10 being unevenly dispersed. In addition, in this example, the configuration in which only the upper three-way valve 9 is switched based on the detection signal of the water level detector 16 in FIG. 2 is exemplified, but a configuration in which the lower three-way valve 12 is simultaneously switched at the same time as the upper three-way valve 9 is also used. Good, if the lower three-way valve 12 is also switched, the air in the pipeline can be released better.

In this example, the water level detector 16 detects the water filling start state into the bathtub 1 and the water level detector 17 detects the water filling end state.
In a bathtub that can remotely control the water filling to the outside,
The control device 18 may detect the start of water filling by an external start signal from a telephone line or the like or an external start signal by a switch operation. Further, even if the water level detector provided separately above the side wall surface of the bathtub 1 detects the completion of the water filling, the water flow sensor for detecting that a constant flow of water has flowed into the bathtub 1 completes the water filling. May be detected, or the end of water filling may be detected via a timer after a certain period of time. When the water in the bathtub 1 is extracted from the outlet after bathing, the water level detector 16 can detect the drained state, but separately detects that the water in the bathtub 1 has been drained. The discharge detection means may be provided in the drainage port of the bathtub or the like.

[0013]

Industrial Applicability According to the present invention, a circulation path with a pump for extracting hot water in a bathtub and returning it to the bathtub again, a filter provided in this circulation path, and water passing through this filtration apparatus in the filtering direction. In a bathtub filtering device equipped with a switching valve for selecting a filtration flow channel and for switching backwash flow channel selection for passing backwash water to the filter in the backwash direction and discharging backwash drainage to the outside of the circulation path, A start detecting means for detecting the start of water filling, and an end detecting means for detecting the end of water filling in the bathtub, in a state where the switching valve is held at the filtration flow path selection position,
The switching valve is switched to the reverse flow passage selection position when the start detection means detects the water filling start, and the switching valve is switched to the filtration flow passage selection position when the end detection means detects the water filling end. By providing a control device for controlling the water flow, the switching valve is switched to the backwash flow path selection position at the start of water filling so that the air in the filter etc. is satisfactorily discharged to the outside, and the filter etc. is filled with water. In addition, the switching valve is closed at the time when the water filling is completed, and it is possible to respond well to the subsequent filtering operation, and air may remain in the filter etc. when water is filled as in the conventional case. Therefore, it is possible to satisfactorily eliminate problems such as a pump caused by residual air.

Further, a circulation path with a pump for extracting hot water in the bathtub and returning it to the bathtub again, a filter provided in this circulation path, and a filtration flow path selection for passing water in the filtration direction to the filtration apparatus. And, in the bathtub filtration device equipped with a switching valve that switches backwash flow channel selection for passing backwash water to this filter and discharging backwash drainage to the outside of the circulation path, hot water in the bathtub was discharged. A discharge detecting means for detecting that the bathtub is filled with water, and an end detecting means for detecting that the water filling in the bathtub is completed. When the discharge detecting means detects that the hot water in the bathtub has been discharged, the switching valve To the backwash flow passage selection position, and when the end detection means detects the end of water filling, by providing a control device for controlling the switching valve to switch to the filtration flow passage selection position, Detection means Switch to the bathtub hot water backwash channel selection position the switching valve when it is detected that the discharge of the outside air and communicates the filter in the bathtub is empty state, later,
It is possible to satisfactorily fill the inside of the filter with water when the bathtub is filled with water, and close the switching valve when the end detection means detects the end of the water filling so that the subsequent filtration operation can be well handled. Therefore, there is an effect that air does not remain in the filter or the like and troubles such as a pump due to the residual air can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a bathtub filtration device in a water filling start state.

FIG. 2 is a schematic configuration diagram of a filtering device under water filling.

FIG. 3 is a schematic configuration diagram of a filtering device in a water filling completed state.

FIG. 4 is a schematic configuration diagram of a conventional filtration device during a filtration operation.

FIG. 5 is a schematic configuration diagram of a conventional filtration device during a backwash operation.

[Explanation of symbols]

 1 Bathtub 2 Suction port 3 Jet outlet 5 First pipe 6 Pump 7 Second pipe 8 Third pipe 9 Upper three-way valve 10 Filter 11 Fourth pipe 12 Lower three-way valve 13 Discharge pipe 15 Filter medium 16, 17 Water level detector 18 Control Device 19 Operation switch 20 Backwash switch

Claims (2)

[Claims] 1. A circulation path with a pump that draws hot water from the bathtub and returns it to the bathtub, a filter provided in this circulation path, and a filtration flow path selection that allows water to flow through this filtration apparatus in the filtration direction. Also, in a bathtub filtering device equipped with a switching valve that switches backwash flow channel selection for passing backwash water to this filter and discharging backwash drainage to the outside of the circulation path, detection of start of water filling in the bathtub When the start detection means detects a water filling start in a state where the switching valve is held at the filtration flow path selection position, the start detection means for detecting a water filling start is provided. And a control device for switching the switching valve to the reverse flow path selecting position, and controlling the switching valve to switch to the filtering flow path selecting position when the end detecting means detects completion of water filling. When That tub filtration device. 2. A circulation path with a pump for extracting hot water from the bathtub and returning it to the bathtub again, a filter provided in this circulation path, and a filtration flow path selection for passing water in the filtration direction to this filter. And, in the bathtub filtering device provided with a switching valve for switching backwash flow passage selection for passing backwash water to this filter and discharging backwash drainage to the outside of the circulation path, hot water in the bathtub was discharged. A discharge detecting means for detecting that the bathtub is filled with water, and an end detecting means for detecting that the water filling in the bathtub is completed. When the discharge detecting means detects that hot water in the bathtub has been discharged, the switching valve And a control device that controls the switching valve to switch to the filtration flow path selection position when the end detection means detects the end of water filling. Filter for bathtub .