JPH11207112A - Bath water purification device and prefilter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically wash a prefilter section and water suction section and even near to a water delivery section without being limited in a range for back flow for the purpose of internal washing by disposing a bypass path flowing to the water delivery section from the water suction section side between the water suction section and the water delivery section. SOLUTION: A discharge selector valve 5 is changed over to a discharge pipeline 6 side and a circulating pump P is run in a backward direction to pass bath water through a water suction port 1, a prefilter 2 and a check valve 3 from the bypass pipeline 20 to a water delivery pipeline 10 from which the water is passed backward through a heater H and a filter tank T. The filter media in the filter tank T are floated by backwashing water, by which the filter media are washed. The bath water is discharge from the circulating pump P through the discharge selector valve 5 then through the drain pipeline 6 to the outside of a bathtub. The internal washing may be executed over a wide range simply by changing over the discharge selector valve 5 and driving the circulating pump P in the backward direction by the bypass pipeline 20 and the check valve 21. The backflow washing in the device is executed by the simple constitution and the washing of the prefilter 2 is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bath water purifying apparatus and a prefilter.

[0002]

2. Description of the Related Art Bath water in a bathtub is sucked from a water suction section by a circulation pump, and large dusts and the like are removed by a pre-filter. Return the bath water from the flood section to the bath tub,
A device for circulating and purifying bath water by repeating this cycle is commercially available and widely used. Such a bath water purification device,
If the filter is used for a predetermined period of time, dirt and the like adhere to the inside of the filtration device or the like, so it is necessary to periodically perform internal cleaning. However, there is a known device provided with a cleaning mechanism for performing the internal cleaning by flowing back the bath water. Have been.

[0003]

However, in the conventional bath water purifying apparatus, the back flow of the bath water is limited in order to back-flow the bath water to perform the internal cleaning. Could not be washed automatically. In particular, the pre-filter part is currently under the maintenance of the user, and there is a problem that the user needs to wash his / her hands. An object of the present invention is to remedy the above-mentioned disadvantages of the prior art.

[0004]

In order to achieve the above-mentioned object, the present invention provides a circulating pump for absorbing bath water in a bathtub from a water absorption section, performing predetermined treatment in a purification processing section, and then discharging the water from the water discharge section. In a bath water purification apparatus comprising: a purifying mechanism for returning bath water to a bath tub; and a cleaning mechanism for back flowing bath water by the circulating pump to clean the inside of the bath water. A bypass path that circulates only from the side to the water discharge section side is provided. With this configuration,
When backflowing the bath water, it is possible to backflow the water from the water suction section through the bypass path, so that the backflow can be performed in a wide range of almost the entire apparatus. Therefore, the inside of the entire apparatus can be cleaned. Further, since the bypass path is a one-way flow path from the water suction section to the water discharge section side, there is no need to provide a switching valve or the like, simply by operating the circulation pump in the reverse direction,
It is possible to realize a backflow of the entire bath water. A pre-filter is provided on the purification processing unit side of the connection of the water absorption unit with the bypass passage, a switching valve is provided between the pre-filter and the connection unit, and bath water is supplied to the other side of the switching valve outside the system. By providing a discharge line for discharging water to the pre-filter, the water suction portion side of the pre-filter can be switchably connected to the discharge line, so that the backflow water of the bath water can be poured into the pre-filter. Automatic cleaning of the garbage can also be performed.
As a pre-filter for performing such automatic cleaning, a configuration in which a plurality of plate-like filter members are loaded by an amount that leaves a predetermined space inside a space of a predetermined volume having an inlet and an outlet of bath water. Is desirable. The plate-like filter member is separated by flowing back the bath water, so that the dust attached between the filter members can be lifted up and discharged from the discharge pipe. It is desirable to provide a clogging prevention mechanism by the filter member at the outlet and the inlet of the bath water. Further, by providing the pre-filter in a closed loop capable of heat circulation, the pre-filter can be washed with heat, and the bacteriostatic effect of the entire system can be further improved.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1A, a water suction pipe 4 protrudes from a main body surrounded by a dotted line, and is connected to a water suction port 1 via a check valve 3 and a pre-filter 2. The water inlet 1 is located in a bathtub (not shown), and sucks bathwater from the bathtub and sends it to the main body through a water suction pipe 4.

[0006] The water suction pipe 4 is connected to a circulation pump P via a discharge switching valve 5, and the circulation pump P is configured to suck up bath water and send it to the filtration tank T. In the filtration tank T, the bath water is filtered, heated to a predetermined temperature by the heater H, passed through the water discharge pipe 10 and the check valve 11, and returned from the water outlet 12 to the bath tub.

A bypass pipe 20 is provided near the water inlet 1 and the water outlet 12. In this embodiment, the connection portion 15 is located outside the main body between the check valve 3 and the discharge switching valve 5, and the bypass line 20 and the water suction line 4 are connected here. Further, the water discharge section side is provided with a water discharge pipe 10 outside the main body between the corresponding check valve 11 and the heater H.
And the bypass line 20.

A check valve 21 is provided in the middle of the bypass pipe 20 so that bath water flows only from the water suction pipe 4 to the water discharge pipe 10 and does not flow in the opposite direction. The discharge switching valve 5 is for switching the connection to the circulation pump P between the water suction pipe 4 side and the discharge pipe 6 side, and the discharge pipe 6 is located outside the bathtub. With this configuration, at the time of backwashing, the washing water from the circulation pump P is caused to flow to the discharge pipe 6 side, and is discharged outside the bathtub and outside the system.

In the above configuration, when cleaning the inside, as shown in (B), the discharge switching valve 5 is switched to the discharge line 6, and the circulation pump P is operated in the reverse direction.
The bath water flows from the bypass line 20 to the water discharge line 10 through the water suction port 1, the pre-filter 2, and the check valve 3, and flows through the heater H and the filtration tank T in a direction opposite to the normal direction. This backflow water causes the filter material inside the filter tank T to float and to be washed. Then, the water is discharged from the circulation pump P through the discharge switching valve 5 to the outside of the bathtub from the discharge line 6. As described above, the internal cleaning can be performed in a wide range by simply switching the discharge switching valve 5 by the bypass pipe 20 and the check valve 21 and driving the circulation pump P in the reverse direction.

(C) In the state where the discharge switching valve 5 is connected to the water suction line 4, the circulating pump P is reversed to circulate the backflow water, and the backflow water is heated to a high temperature of 70 ° C. or more, and the internal pressure is increased. 2 shows an example in which high-temperature cleaning is performed.
This high-temperature cleaning can also be performed in a wider range than before by the bypass pipe 20.

FIG. 2 shows a configuration in the case where the circulating pump P is of the type that cannot be driven in reverse rotation, and of the type that cannot switch between suction and discharge. Here, a pump switching valve 30 and a pump line 31 are added to the circulation pump P, and the bath water is caused to flow backward by switching the pump switching valve 30. (B) is the state of backwashing,
(C) shows the state of backflow heat circulation.

FIGS. 3 and 4 show pump switching valves 3 respectively.
In the figure, a configuration using two normal three-way switching valves 32 as 0 is shown.

FIG. 5 shows an existing bath water purifier to which the configuration of the present invention is added. In this embodiment, the cleaning water is discharged outside the system by a switching valve 35 instead of the discharge switching valve 5. Further, the switching valve 33 and the switching valve 34 are configured to cause the bath water to flow backward. In this embodiment, a sterilizer UV is provided to sterilize bath water. (A) shows a state of a normal purification operation, (B) shows a state of a backflow cleaning operation, (C) shows a state of a bypass jet operation, and (D) shows a state of a forward heat circulation operation.

FIG. 6 shows a configuration that enables backwashing of the prefilter 2. In this embodiment, the pre-filter 2 is provided upstream of the discharge switching valve 5 at the time of reverse flow, that is, between the discharge switching valve 5 and the circulation pump P, whereby the back-flow water flows into the pre-filter 2 to perform cleaning. You can do it. In this embodiment, the basic configuration is the same as that shown in FIG. 2, but a sterilizer UV is newly provided before the filtration tank T, and the heater H is connected to the pump line 3.
1 is different from that of FIG.

In the above configuration, as shown in (A), during normal purification operation, bath water is sucked in from the water intake port 1,
After passing through the check valve 3, the water suction pipe 4 and the discharge switching valve 5, the pre-filter 2 passes through the pump switching valve 30,
And a heater H, further passes through a sterilizer UV and a filtration tank T, where it is sterilized and filtered, passes from a pre-filter cleaning valve 7 through a drain pipe 10 and a check valve 11, and from a water outlet 12 to a bathtub. Will be returned. When the pre-filter 2 is backwashed, as shown in FIG.
0 and discharge switching valve 5 and pre-filter cleaning valve 7
Switch. Thereby, the bath water passes through the check valve 3, the bypass pipe 20, the check valve 21, the water discharge pipe 10, the pre-filter cleaning valve 7 from the water suction port 1, and the filtration tank T and the sterilizer UV pass directly. It flows to the pump switching valve 30, passes through the circulation pump P and the heater H, and flows again from the pump switching valve 30 to the pre-filter 2. At this time, the bath water flows into the pre-filter 2 from the opposite direction to the case shown in FIG. 3A, cleans the inside, and is discharged from the discharge pipe 6 via the discharge switching valve 5. As described above, the backflow cleaning of the pre-filter 2 can be performed. (C) is a state diagram in the case of performing backwashing of the whole, and also in this case, backwashing of the pre-filter 2 is performed. (D) is a state diagram of the bypass jet,
(E) is a state diagram of the backflow heat circulation.

The pre-filter 2 for performing backwashing includes:
It is naturally preferable to use one having a high cleaning effect due to backflow, and an embodiment thereof is shown in FIG. In FIG. 7, the prefilter 2 has a cylindrical shape, and has an inlet 23 and an outlet 24 at its upper and lower bottoms, respectively. During normal purification operation, bath water flows from the inlet 23 to the outlet 24. It is flowing. A large number of filter members 25 are floatably and freely mounted inside the pre-filter 2.

As shown in FIG. 8, the filter member 25 is a round plate made of a plastic resin in this embodiment, and is provided with a mesh 2 provided near the outlet 24 of the pre-filter 2.
6 on top of each other. The stitches of the net 26 are naturally sized so that the filter member 25 cannot be pulled out.
The round plate may be a thin metal plate. Any weight that can be lifted by the force of the reverse flow of water may be used. In the present embodiment, the shape is round, but a shape such as a square or a star and a method of applying a wave to the plate-like shape may be considered. By changing the shape in this way, the gap at the time of stacking can be adjusted.

When the bath water is flowing from the inlet 23 to the outlet 24, the pre-filter 2 having the above-described structure is used for the filter member 25.
Are stacked on the net 26 and serve to remove large debris from the bath water passing through the gap. On the other hand, when the bath water flows backward from the outlet 24 to the inlet 23, the filter member 25 separates from the net 26 and floats in the pre-filter 2 as shown in FIG. It is discharged from the inlet 23. In FIG. 6, the dust is discharged out of the bathtub through the discharge line 6, and the pre-filter 2 is cleaned. In addition, it is desirable to form a sticking prevention pin 27 around the inlet 23 so that the filter member 25 sticks and does not block the inlet 23 during backwashing.

FIG. 10 shows the most basic structure for enabling back-flow cleaning of the pre-filter 2. The bypass line 20, the check valve 21 and the check valve 3 are different from the structure of FIG. And the check valve 11 is removed.
Other configurations are the same as those in FIG.

[0020]

As described above, according to the bath water purifying apparatus of the present invention, the inside of the apparatus can be backwashed over a wide range with a simple structure. In addition, there is an effect that backflow cleaning of the prefilter can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing one embodiment of the present invention.

FIG. 2 is a schematic view showing another embodiment of the present invention.

FIG. 3 is a schematic view showing another embodiment of the present invention.

FIG. 4 is a schematic view showing another embodiment of the present invention.

FIG. 5 is a schematic view showing another embodiment of the present invention.

FIG. 6 is a schematic view showing an embodiment in which a backflow cleaning of the prefilter of the present invention is possible.

FIG. 7 is a front sectional view showing one embodiment of a prefilter of the present invention.

FIG. 8 is an enlarged perspective view showing the internal structure of the prefilter of the present invention.

FIG. 9 is a front sectional view showing a state of the prefilter of the present invention at the time of backwashing.

FIG. 10 is a schematic view showing another embodiment capable of backwashing the prefilter of the present invention.

[Explanation of symbols]

1: water intake port, 2: prefilter, 3: check valve, 4: water absorption line, 5: discharge switching valve, 6: discharge line, 7: prefilter cleaning valve, 10: water discharge line, 11: Check valve,
12: water outlet, 15: connection, 20: bypass line, 2
1: check valve, 23: inlet, 24: outlet, 25: filter member, 26: net, 27: sticking prevention pin, 30: pump switching valve, 31: pump line, 32: three-way switching valve, 33 : Switching valve, 34: switching valve, 35: switching valve, T: filtration tank, H: heater, P: circulation pump, UV: sterilizer.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 29/08 540A 29/38 510B 520A

Claims (5)

[Claims] 1. A purifying mechanism for sucking bath water in a bathtub from a water absorbing section by a circulation pump, performing predetermined processing in a purification processing section, and returning the bath water from the water discharge section to the bathtub, A washing mechanism for backwashing the inside to wash the inside thereof, wherein a bypass path that circulates only from the water absorbing section side to the water discharging section side is provided between the water absorbing section and the water discharging section. A bath water purification device characterized by the following. 2. A pre-filter is provided on a purification processing unit side of a connection portion of the water absorption unit with a bypass passage, a switching valve is provided between the pre-filter and the connection unit, and a switching valve is provided on the other side of the switching valve. A bath water purifying apparatus, comprising: a discharge pipe for discharging bath water out of the system; and a switchable connection between the water suction section of the pre-filter and the discharge pipe. 3. A space having a predetermined volume having an inlet and an outlet of bath water, and a plurality of plate-like filter members inserted in an amount that leaves a predetermined space inside the space. Prefilter. 4. The pre-filter according to claim 3, wherein a clogging prevention mechanism by the filter member is provided at an outlet and an inlet of the bath water. 5. A purifying mechanism that absorbs bath water in a bathtub from a water absorbing section by a circulation pump, performs predetermined processing in a purification processing section, and returns the bath water from the water discharge section to the bathtub. A washing mechanism for backwashing the inside to wash the inside thereof, wherein a bypass passage is provided between the water absorption section and the water discharge section, the bypass path being circulated only from the water absorption section side to the water discharge section side. A pre-filter is provided on the purification processing unit side with respect to a connection part of the unit with the bypass passage, a switching valve is provided between the pre-filter and the connection unit, and bath water is discharged out of the system on the other side of the switching valve. A pre-filter is connected to the pre-filter so that the water-absorbing portion side of the pre-filter can be switchably connected to the pre-filter. Is charged in an amount that leaves a predetermined gap. And a plurality of plate pieces shaped filter member, the bath water purifying device, characterized in that.