JPH05161810A - Filter device for bathtub - Google Patents

Abstract

PURPOSE:To provide the title filter device capable of certainly discharging bacteria propagating in the periphery of a filter and the remains thereof in due regard to the standing time of contaminated hot water in such a case that the remaining hot water is reheated on the next day to be reused in bathing. CONSTITUTION:A filter device for a bathtub is equipped, with a circulating route drawing out the hot water in the bathtub 10 to again return the same to the bathtub 10, the filter 34 provided to the circulating route, three-way valves 26, 40 changing over water supply to a forward direction or the reverse direction with respect to the filter 34 and detectors 50, 60 detecting the water filling state of the bathtub 10 and a control unit 6 operating the three-way valves 50, 60 so as to perform backwashing operation prior to filtering operation at each time when a predetermined time is elapsed after backwashing operation is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub filtering device for filtering water in a bathtub, and more particularly to a bathtub filtering device incorporating a filter in a circulation passage of a bubble bath for blowing bubbles into the bathtub. It is about.

[0002]

2. Description of the Related Art Conventionally, as a bathtub filtering device of this type, there is a bathtub filtering device as disclosed in Japanese Patent Application Laid-Open No. 3-60709, and this device replaces water in the bathtub. After that, during the first filtration operation, backwashing operation is performed for a certain period of time to wash the inside of the filter.

However, in such a device, the backwash operation cannot be performed unless the water in the bathtub is replaced, so that the backwash can be performed on the next day when the remaining hot water is reboiled to take a bath. If it is not done and the dirty water after bathing is left for a long time (for example, overnight), bacteria have remarkably proliferated in the filter part in particular. There was a problem that the water leaked into the bathtub and was forced to bathe in extremely dirty hot water when bathing again.

Further, as disclosed in Japanese Utility Model Laid-Open No. 63-157218, there is a structure in which backwashing can be performed when the integrated value of the filtration operation time reaches a set time.
Even in such a device, if the bathing of the day is finished before the filtration operation time reaches the set time and the bath is reboiled the next day to bathe, the dirty water containing the germs growing around the filter will be removed in the same manner as above. There was a problem that it would flow out into the bathtub.

[0005]

The present invention has been devised in view of the above-mentioned problems of the prior art, and when dirty water is left around the filter, bacteria and dead bodies around the filter are removed. The first gist of the invention is to provide a bathtub filtration device that can be reliably discharged to the outside by backwashing, and the first gist thereof is 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 a selection of a filtration flow path that allows water to flow through the filter in the filtering direction, and water that flows through the filter in the opposite direction for backwashing and circulation of backwash drainage. In a bathtub filtering device having a flow passage switcher for switching backwash flow passage selection to be discharged to the outside of the passage and a water filling detector for the bathtub, the water filling detector detects the water filling state in the bathtub and the filtration flow. After any one or more operations of the filtering operation by selecting the path and the backwashing operation by selecting the backwashing flow path, the backwashing operation is performed every time a predetermined time elapses before the filtering operation. That is, a control device for operating the path switching device is provided. Here, the predetermined time may be a preset time, or may be a time that changes depending on the detected driving condition.

The second gist is that the circulation path with a pump that draws hot water from the bathtub and returns it to the bathtub, the filter provided in the circulation path, and the water flow in the filtration direction to the filtration apparatus. And a flow path selector for switching backwash flow path selection in which backflow is performed by passing water in the reverse direction to the filter and performing backwash and discharging backwash drainage to the outside of the circulation path, and In a bathtub filtration device having a water filling detector, any one of detection of a water filling state in the bath by the water filling detector, filtration operation by selection of the filtration flow path, and backwash operation by selection of the backwash flow path. Alternatively, a control device for activating the flow path switching device and the pump to automatically perform the backwash operation after a lapse of a predetermined time after two or more operations is provided. Here, the predetermined time may be a preset time, or may be a time that changes depending on the detected driving condition.

[0007]

[Effect] Considering the time allowed for bacteria to proliferate in the vicinity of the filter, when water or hot water is left around the filter for a predetermined time, the backwash operation should be performed prior to the filtration operation. Therefore, the bacteria and their dead bodies propagated around the filter can be reliably discharged to the outside by backwashing.

Also in the second aspect, the bacteria propagated around the filter can be backwashed automatically after a lapse of a predetermined time and reliably discharged to the outside.

[0009]

EXAMPLES Examples 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 10.
It is connected to the suction port 20 of the pump device 18 via 6. Further, the return port 14 is connected to the discharge port 24 of the pump device 18 via the pipe 22. A pump 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 via the pipe 32.
4 is connected 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 a filtered water discharge port 36. The outer side of the filter cylinder 34a is filled with a granular filter material 34b made of ceramics such as alumina, activated carbon, or a granular material carrying heavy metals.

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 discharging backwash drainage is further connected to the three-way valve 40.

This bathtub filtering device also serves as a bubble jetting device for blowing bubble-containing water into the bathtub 10, and an air mixing nozzle device 48 is provided at the connection portion of the return port 14 of the pipe 22. 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.
Water detection sensors 58, 60 are provided on the bottom and side surfaces of the bathtub 10.
Are provided, and the detection symbols of these sensors 58 and 60 are input to the control device 66. The controller 66 is the switch 5
6. The pump device 18 and the valves 26 and 40 are installed so that signals can be transmitted.

A flow rate sensor 70 for detecting the flow rate of hot and cold water flowing through the pipe 42 is attached to the pipe 42, and a detection signal from the flow rate sensor 70 is inputted to the control device 66. Has been done.

The operation of the bathtub filtering device thus configured will be described. FIG. 2 shows the flow path selection when the filtration operation is performed. That is, during the filtration operation, the three-way valve 26 connects the pipe 32 and the pipe 28, and the three-way valve 40 connects the pipe 38 and the pipe 42. Bathtub 10
The water inside reaches the outlet 16, the pipe 16 and the inlet 20, and further reaches the outlet 24 via the pipe 18b, the pump 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.
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, the filter cylinder 34
After passing through a, it reaches the filtered water drainage port 36, and the pipes 32, 2
8 to the suction port 20. Then, from the suction port 20 to the pipe 18b, the pump body 18a, and the pipe 18 as described above.
It reaches the discharge port 24 through c. In this way the bathtub 10
The water inside can be filtered.

When water flows through the nozzle device 48,
Air is introduced into the nozzle device 48 from the pipe 52, and the return port 1
Bubbles are mixed in the water ejected from No. 4. 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 water filling of the bathtub 10 is started,
First, the sensor 58 detects water, and then the sensor 60 detects water, whereby it is detected that the bathtub 10 is filled with water. The two sensors 58 and 60 are provided to detect that water is filled when the bathtub 10 is empty. Therefore, even if water is added and the level of the water level sensor 60 rises when there is a small amount of residual water in the bathtub 10, the controller 66 does not treat it as water filling.

After the water filling is detected, first the switch 5
When 6 is operated, a backflow is performed for a predetermined time as follows by a control signal from the control device 66. First, the three-way valve 26 connects the pipes 30 and 32, and the three-way valve 40
Connects the pipes 42 and 46. When the pump body 18a is operated after performing such flow path selection, the water in the bathtub 10 reaches the suction port 20 through the outflow port 12 and the pipe 16, and further the pipe 18b, the pump body 18a, and the pipe 18c. After that, it reaches the discharge port 24. Of the water reaching the discharge port 24, the required ratio is returned from the pipe 22 to the bath 10. Bubbles are also ejected during this backwashing operation. The remaining water from the pipe 18c to the discharge port 24 is introduced into the filter 34 from the filtered water discharge port 36 through the pipes 30 and 32. This water further passes through the filter cylinder 34a, and then the granular filter material 3
It enters into the packed bed of 4b, and the packed bed of the granular filter material 34b is made to flow. After that, water is received at the inlet 44 and the pipes 42 and 46.
Is discharged to the outside. In this way, since the granular filter material 34b is fluidized during the backwash, the granular filter material 34b is
The particulate filter media 3b or the filter cylinder 34a rub against each other, and the substances attached during filtration are sufficiently removed.

Since this backwash water is clean water that has been newly filled in the bathtub 10, it does not contain any dirt component and the filter 34 can be cleaned sufficiently. When such backwashing is performed for a predetermined time, the flow path selection of the three-way valves 26, 40 is switched by a signal from the control device 66, and the filtration operation is automatically started.

An actual example of the control operation by the control device 66 will be described with reference to the time chart shown in FIG. In the control operation shown in FIG. 4, the sensors 58, 6 are
When the control device 66 detects the completion of water filling into the bathtub 10 by the signal from 0, the timer in the control device 66 is set, and the elapsed time after that is measured by the timer, that is, the elapsed time, that is, the filter 34. The operation time is controlled based on the accumulated time of hot and cold water left inside.

After the timer is set and before the operation switch 56 is turned on before the lapse of t ₁ hour (for example, 6 hours), when the operation switch 56 is turned on for the first time, the backwash operation is performed first before the filtration operation. For 1 minute. Even if the operation switch 56 is turned on again after that, the backwash operation is not performed.

When the operation switch 56 is turned on after the lapse of t ₁ hour, the backwash operation is performed for a short time of about 20 seconds before the filtration operation, and then the operation switch 56 is turned on again. However, no backwash operation is performed.

When the operation switch 56 is first turned on after the time t ₂ (for example, 24 hours) has elapsed, the backwash operation is performed for 20 seconds prior to the filtration operation. When the water in the bathtub 10 is drained and the bathtub 10 is newly filled with water, the timer is reset, and when the operation switch is first turned on again, the backwash operation is performed prior to the filtration operation.

In the operation control of FIG. 4, when the bathtub 10 is refilled with water, backwashing is performed with clean water, and
Even when the hot water is left for a long time, the bacteria that propagate around the filter 34 can be discharged to the outside by a short backwash. In this case, since backwashing is short (about 20 seconds) after the lapse of t ₁ hour, even if backwashing with dirty water, the effect of backfouling of the filter medium in the filter 34 due to this backwashing is not affected. It is less, and rather, the effect of being able to instantaneously discharge the bacteria that have remarkably propagated around the filter 34 is far greater.

Next, FIG. 5 shows a second embodiment of the operation control. That is, in the second embodiment, when the filtration operation switch 56 is first turned on after the water filling in the bathtub 10 is detected, the backwash operation is performed with clean water prior to the filtration operation, and the backwash operation is performed first. Control device 6 from the time
The timer in 6 is set so that the backwashing operation is performed prior to the filtering operation every time a predetermined time elapses.

That is, after the lapse of t ₁ time, the operation switch 5
When 6 is first turned on, a short backwash operation is performed prior to the filtration operation, and when the operation switch 56 is turned on for the first time after t ₂ hours, a short backwash operation is performed prior to the filtration operation. It is to drive. In the second embodiment, the same effect as that of the first embodiment can be obtained, and further, if the filtration operation is performed and dirt is not accumulated in the filter 34, backwashing is not performed without refilling water. This has the effect of eliminating unnecessary backwashing.

Next, FIG. 6 shows a third embodiment of the operation control. That is, in the third embodiment, the backwashing operation is performed prior to the filtering operation when the filtering operation is performed for the first time after t hours (for example, 8 hours) have elapsed after the filtering operation. .. That is, bathing is performed on the first day, filtration operation is performed on the second day, backwash operation is performed on the first filtration operation on the second day, and filtration operation is performed on the first filtration operation on the third day. It is configured to perform the backwash operation. For the t time, for example, the filtering operation time is integrated in the control device 66, and the t time is shortened when the integrated filtration operation time is long based on the integrated filtration operation time. It may be configured such that the time can be reset or the time t can be reset longer when the integrated filtration operation time is shorter.

Next, FIG. 7 shows a fourth embodiment of the operation control. In this fourth embodiment, the first backwashing operation is performed by a manually provided backwashing switch, and then the backwashing operation is performed. In the first filtration operation after t hours (e.g., 8 hours) after the end, the backwash operation is performed prior to the filtration operation. That is, for example, when bathing on the first day, the backwash switch is manually turned on to perform the backwash operation,
When the operation switch 56 is first turned on when bathing on the second day, the backwash operation is performed prior to the filtration operation, and when the bath switch is first turned on when the third day is bathed.
In this case, the backwash operation can be performed prior to the filtration operation.

Next, FIG. 8 shows a fifth embodiment of the operation control. That is, in the fifth embodiment, the first backwashing operation is performed by the manual backwashing switch, and when the time t (for example, 20 hours) elapses thereafter, if there is water in the bathtub 10, the backwashing operation is automatically performed. Perform a washing operation, and if there is no water, then
It is configured to automatically perform backwashing operation when water is filled, and to stand by in a bath preparation state. That is, for example, at the time of bathing on the first day, the backwashing switch is turned on to perform backwashing operation, and the pump device 18 is automatically operated through the control device 66 before the time of bathing on the second day after 20 hours. Backwash operation afterwards, and then with the water still filled, 2
When the third day has passed after the lapse of 0 hours, the pump device 18 is automatically operated to perform the backwash operation before the bathing time, and the bathing standby state is waited.

[0030]

INDUSTRIAL APPLICABILITY According to the present invention, a circulation path with a pump that draws hot water from a bathtub and returns it to the bathtub, a filter provided in the circulation path, and water is passed through the filtration apparatus in the filtration direction. A flow path selector that switches between selection of a filtration flow path and selection of a backwash flow path for backwashing by passing water through the filter in the reverse direction and discharging backwash drainage to the outside of the circulation path; In a bathtub filtering device having a container, any one or two of a detection of a water filling state in the bathtub by the water filling detector, a filtration operation by the selection of the filtration flow path, and a backwash operation by the selection of the backwash flow path. After the above operation, a control device for activating the flow path switching device so as to perform the backwashing operation before the filtration operation is provided every time a predetermined time elapses. In the case of And has an advantage of being able to obtain a clean bathing environment reliably discharged to the outside by backwashing the carcasses.

Further, 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 a filtration channel selection for passing water in the filtration direction to the filtration apparatus And, water is passed in the opposite direction to the filter to backwash it,
In a bathtub filter device having a flow path switcher for switching backwash flow path selection for discharging backwash drainage to the outside of the circulation path, and a water filling detector for the bathtub, in the water filling state in the bathtub by the water filling detector. The backwashing operation is automatically performed after a lapse of a predetermined time after one or more operations of the detection, the filtering operation by the selection of the filtration channel, and the backwashing operation by the selection of the backwashing channel. Since a back flow operation is automatically performed after a lapse of a predetermined time through the control device by providing a flow path switching device and a control device for operating the pump, bacteria and dead bodies thereof that have propagated around the filter by being left unattended. And the like can be automatically and surely discharged to the outside, and the effect of being able to reduce the contamination of the bathtub and the filtering device is obtained.

[Brief description of drawings]

FIG. 1 is a schematic system diagram of a bathtub filtration device.

FIG. 2 is an operation explanatory diagram of a filtration operation.

FIG. 3 is an operation explanatory view of a backwash operation.

FIG. 4 is a time chart diagram showing a first embodiment of operation control.

FIG. 5 is a time chart diagram showing a second embodiment of the operation control.

FIG. 6 is a time chart diagram showing a third embodiment of operation control.

FIG. 7 is a time chart diagram showing a fourth embodiment of the operation control.

FIG. 8 is a time chart diagram showing a fifth embodiment of operation control.

[Explanation of symbols]

 10 Bathtub 12 Outlet port 14 Return port 18 Pump device 26 Three-way valve 34 Filter 34a Filter tube 34b Granular filter material 40 Three-way valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F24H 9/00 W 9033-3L

Claims (2)

[Claims] 1. A circulation path with a pump for extracting hot water from the bathtub and returning it to the bathtub, a filter provided in the circulation path, and a filtration flow path selection for passing water in the filtration direction to the filtration apparatus. And a flow path switcher for switching backwash flow path selection for backwashing by passing water in the reverse direction to the filter and discharging backwash drainage to the outside of the circulation path, and a water filling detector for the bathtub. In the bathtub filtering device, detection of the water filling state in the bathtub by the water filling detector,
After any one or two or more operations of the filtration operation by the selection of the filtration flow path and the backwash operation by the selection of the backwash flow path, the backwash operation is performed every time a predetermined time elapses before the filtration operation. A filter device for bathtubs is provided with a control device for operating the flow path switching device. 2. A circulation path with a pump that draws hot water from the bathtub and returns it to the bathtub, a filter provided in the circulation path, and a filtration flow path selection for passing water in the filtration direction to the filter. And a flow path switcher for switching backwash flow path selection for backwashing by passing water in the reverse direction to the filter and discharging backwash drainage to the outside of the circulation path, and a water filling detector for the bathtub. In the bathtub filtering device, detection of the water filling state in the bathtub by the water filling detector,
The flow passage for automatically performing the backwash operation after a lapse of a predetermined time after any one operation or two or more operations of the filtration operation by the filtration flow path selection and the backwash operation by the backwash flow path selection. A bathtub filtration device comprising a switching device and a control device for operating the pump.