JPH08323118A - Water purifier - Google Patents

Abstract

PURPOSE: To enable to wash even every corner of a filter medium by washing the filter medium, while a flow rate of washing water is varied. CONSTITUTION: A circulation pump 16 for feeding the washing water and a filter tank 20 are connected with both a feeding pipe 22 and a washing piping 23 and also a feed flow rate variable means 24 for varying the flow rate of the washing water is connected to the circulation pump 16. Hence the flow rate of the circulation pump 16 can be varied by the feed flow rate variable means 24 and then the filter medium moves to surely perform the purification.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to bath water, pool water,
The present invention relates to a commercial or domestic water purification device for purifying water such as aquaculture water.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a purifier of this type has a seven-port switching valve for purifying hot water 2 in a bathtub 1 by a circulation pump 9 from a hot water suction pipe 3 in order during purifying operation. 5 → outflow / inflow pipe 7 → over tank 6 → outflow / inflow pipe 8 → seven port switching valve 5 → pump inflow pipe 10 → circulation pump 9 → pump outflow pipe 11 → seven port switching valve 5 → through spout pipe 12 It was circulated and filtered. Further, during the washing operation, the hot water 2 in the bathtub 1 is circulated by the circulation pump 9, the hot water suction pipe 3, the seven port switching valve 5, the pump inflow pipe 1
0, the circulation pump 9, the pump outflow pipe 11, the seven port switching valve 5, the outflow / inflow pipe 8, the filtration tank 6, the outflow / inflow pipe 7, and the seven port switching valve 5 from the drain pipe 13 to the inside of the filtration tank 6. The dirt adhering to the filter medium was washed. Furthermore, when switching from the purification operation to the filtration operation, the seven-port switching valve 5, so that the hot water 2 in the bathtub 1 is not soiled by the dirt remaining in the filtration tank 6.
Circulation in a closed circuit that returns to the seven port switching valve 5 via the outflow / inflow pipe 7, the filtration tank 6, the outflow / inflow pipe 8, the seven port switching valve 5, the pump inflow pipe 10, the circulation pump 9, and the pump outflow pipe 11. The pump 9 was operated to operate so that dirt was accumulated in the filtration tank 6 (Japanese Patent Laid-Open No. 6-141995).

[0003]

However, in the above configuration, there is a problem that even if the filter medium is washed, dirt remains on a part of the filter medium and the entire filter medium is not uniformly washed. Further, the degree of contamination of the filter medium is not known, and even if the filter medium is not contaminated, cleaning is performed and wasteful cleaning water is discharged. In addition, the initial purifying ability sometimes decreased after many years of operation.

In order to solve the above problems, the present invention has as its first object to enhance the cleaning ability.

A second object is to reduce the cost of the water purifying device. A third object is to shorten the cleaning time of the filter medium.

Furthermore, the fourth object is to save the water to be purified without discharging wasteful water to be purified.

The fifth object is to maintain the initial purification capacity even after many years of filtration operation.

[0008]

In order to achieve the first object, the present invention comprises a filtering means for filtering contaminants of water to be purified, a washing pipe connected to the filtering means, and a washing pipe. A supply means for supplying cleaning water that passes through to wash the filtration means and a supply flow rate changing means for changing the supply flow rate of the supply means are provided.

Further, in order to achieve the second object, the present invention uses cleaning water for cleaning the filtering means as water to be purified, and is connected to the filtering means for filtering contaminants of the water to be purified, and to the filtering means. The cleaning pipe, the supply unit for supplying the cleaning water for cleaning the filtering unit through the cleaning pipe, and the supply flow rate changing unit for changing the supply flow rate of the supply unit are provided.

In order to achieve the third object, the present invention further comprises a filtering means for filtering contaminants of the water to be purified, a washing pipe connected to the filtering means, and a filtering means passing through the washing pipe. A supply means for supplying the water to be purified for cleaning the water and a supply operation control means for varying the supply flow rate of the supply means are provided.

In order to achieve the above-mentioned fourth object, the present invention further comprises a filtering means for filtering contaminants of the water to be purified, a washing pipe connected to the filtering means, and a filtering means passing through the washing pipe. Supply means for supplying purified water for cleaning the cleaning means, discharge means for discharging purified water after cleaning the filtering means, and turbidity detecting means for detecting turbidity of the purified water after cleaning the filtering means And a supply operation control means for operating the supply means by a signal from the turbidity detection means.

Further, in order to achieve the fifth object, the present invention further comprises a filtering means for filtering contaminants of the water to be purified, a washing pipe connected to the filtering means, and a filtering means passing through the washing pipe. Supply means for supplying purified water for cleaning the cleaning means, discharge means for discharging purified water after cleaning the filtering means, temperature detecting means for detecting the temperature of the purified water after cleaning the filtering means, The heating means for heating the water to be purified by the signal of the temperature detecting means is provided.

[0013]

According to the first aspect of the present invention, the washing water reaches the inside of the filtering means through the washing pipe by the supplying means at the time of washing. Then, the supply flow rate varying means is operated, and the filter medium in the filtering means is alternately washed with a large flow rate and a small flow rate of cleaning water, so that the flow rate difference between the large flow rate and the small flow rate, that is, the water pressure is applied to the entire filter medium in the cleaning means. By conveying and changing the filter medium, every corner of the filter medium is washed.

According to the second aspect of the present invention, the cleaning water is used as the water to be purified, so that the cleaning water for cleaning the cleaning means and the supply means for supplying the cleaning water are not separately configured. Means for cleaning the means.

According to the third aspect of the present invention, the water to be purified reaches the inside of the cleaning means through the cleaning pipe by the supplying means at the time of cleaning. Then, the supply operation control means is operated to wash the filter medium in the filtering means at a large flow rate at arbitrary time intervals, thereby transmitting the difference in flow rate, that is, the water pressure of only the large flow rate, to the entire filter medium in the purifying means, and at the time of cleaning. The filter material is washed by making the fluctuation of the filter material extremely large.

According to the fourth aspect of the present invention, the water to be purified reaches the inside of the cleaning means through the cleaning pipe by the supplying means at the time of cleaning. The water to be purified that has reached the inside of the purifying means is discharged from the discharging means after cleaning the filter medium inside the purifying means. When the turbidity detection means detects that the discharged water to be purified has a turbidity lower than a certain level, the detection signal is transmitted to the supply operation start / stop means and the operation of the supply means is stopped, whereby unnecessary cleaning of the filtration means is performed. Is to prevent.

According to the fifth aspect of the present invention, the water to be purified reaches the inside of the cleaning means through the cleaning pipe by the supplying means at the time of cleaning. The water to be purified that has reached the inside of the purifying means is discharged from the discharging means after cleaning the filter medium inside the purifying means. When the temperature detecting means detects that the discharged water to be purified is below a certain temperature, the detection signal is transmitted to the heating means to heat the water to be purified, and the filter medium is washed with the heated water to be purified. The substance to be purified adhered to is melted and separated from the filter medium to facilitate cleaning.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first and second inventions will be described below with reference to the attached FIGS. 1, 2 and 4 [A] [B] [C]. In FIG. 1, reference numeral 14 is a bath, and a return pipe 15 is connected to the suction side 17 of the circulation pump 16 from the bath 14. From the discharge side 18 of the circulation pump 16, a forward pipe 22 is provided so as to be connected to the bath 14 via a three-way valve (A) 19, a filtration tank 20, and a three-way valve (B) 21. The three-way valve (A) 19 and the three-way valve (B) 21 are connected by a cleaning pipe 23 so as to bypass the filtration tank 20. The circulation pump 16 is provided with a supply flow rate varying means 24 for controlling the rotation speed of the motor of the circulation pump 16 in order to change the flow rate of the water flowing from the bath 14.
The filtration means is the filtration tank 20, and the supply means is the circulation pump 1.
It is 6.

FIG. 2 shows the relationship between the change in the flow rate of water flowing from the bath and the time. The times t1 and t3 correspond to the flow rate α, and the time t2 corresponds to the flow rate β (α> β), respectively (t1 <t2 <t3). By operating the supply flow rate varying means 24 and controlling the circulation pump 16, the flow rate of the water discharged from the circulation pump 16 gradually increases by the time t1, and when the time reaches t1, the flow rate becomes α. , And then the flow rate gradually decreases by the time t2.
When it reaches 2, the flow rate becomes β. Repeat this time t
Repeat after 2.

FIG. 4A shows the state of the granular filter medium in the filter tank 20 immediately after the circulating filtration of the bath water is stopped. The space between the filter bed 25 and the granular filter media 26, 27 is a.
Further, the filter medium upper layer portion 28 is fixed with human dust 29.
4B and 4C show a state in which the granular filter medium is changed by the flow rate change of the water discharged from the circulation pump 16 during the cleaning of the filter tank 20. In FIG. 4 [B], when the bath water flows in the water flow direction 30 at the flow rate α at time t1 in FIG. 2, the granular filter medium 26 in FIG. 4 [A] changes to the state of the granular filter medium 31. However, the granular filter material 27 shown in FIG. 4A remains as it is. Granular filter medium 31 and filter bed 2
The interval of 5 is b (a <b). Next, in FIG. 4 [C], when the flow rate of bath water decreases from α to β as time t 1 progresses to t 2 in FIG. 2, the granular filter medium 31 in FIG. 4 [B] descends to the granular filter medium 32. Then, when the time advances to t3 in FIG. 2, the bath water is in the water flow direction 3 at the bath water flow rate α in FIG.
3, the granular filter material 27 of FIG. 4 [B] changes to the state of the granular filter material 34 of FIG. 4 [C]. Granular filter medium 34 and filter bed 25
Is b (a <b).

Next, the operation of the first and second inventions will be described. From FIGS. 1, 2 and 4 [A] [B] [C], the three-way valve (A) 19 and the three-way valve (B) 21 are provided immediately after the circulation filtration of the water in the bathtub 14 by the filtration tank 20 is completed. , The water in the bathtub 14 passes through the return pipe 15 and goes from the pipe 22 to the cleaning pipe 2
When the circulation pump 16 is operated in a state in which the circulation pump 16 is opened so as to branch into 3 and flow into the filtration tank 20, the water in the bathtub 14 passes through the return pipe 15, the outflow pipe 22, and the cleaning pipe 23, and the filtration tank 2
Reaches 0. At this time, if the supply flow rate varying means 24 is simultaneously operated, the water in the bathtub 14 that has reached the filtration tank 20 changes to a large or small flow rate as shown in FIG.

Immediately before the water in the bath 14 reaches the filtering tank 20, the granular filtering material in the filtering tank 20 is the granular filtering material 2 shown in FIG.
It is in the state of 6, 27.

When the water in the bath 14 flows into the filtration tank 20 at the large flow rate α (time t1) of FIG. 2 in the direction of the water flow 30 of FIG. 4B, the granular filter medium 26 of FIG. The state of the granular filter medium 31 shown in FIG. 4B is changed. Next, the water in the bathtub 14 is shown in FIG.
As shown in FIG. 4C, the flow rate changes to a small flow rate β as time advances to t2, and the granular filter medium 31 in FIG. 4 [B] descends to the granular filter medium 32 in FIG. Then, after a lapse of time t2, the flow rate again changes to a large flow rate α as time t3 elapses, and flows into the filtration tank 20 in the direction of the water flow 33 of FIG.
The granular filter material 27 of [B] changes to the state of the granular filter material 34 of FIG. 4C, and thus the fixed granular filter material upper layer portion 28 of FIG. 4A is decomposed and washed.

Next, an embodiment of the third invention will be described with reference to the attached FIGS. 3, 4 [A] [D] [E] and FIG. 5. FIG. 3 shows the relationship between the change in the flow rate of water flowing from the bath and time. The flow rate α is the same as that in FIG.
The times t1 and t3 correspond to the flow rate α, and the time t2 corresponds to the flow rate 0 (t1 <t2 <t3). By operating the supply operation control means 40 shown in FIG. 5 and controlling the circulation pump 16, the flow rate of the water flowing from the bathtub 14 increases rapidly by the time t1, and when the time reaches t1, the flow rate is α
Then, the flow rate decreases rapidly until the time advances to t2, and when the time reaches t2, the flow rate becomes zero. This repetition is repeated after time t2. 4D and 4E show a state in which the granular filter medium is changed by the flow rate change of the water discharged from the circulation pump 16 during the cleaning of the filter tank 20.

4 (D), when the bath water flows in the water flow direction 35 at the flow rate α at the time t1 in FIG.
The granular filter medium 26 of [A] changes to the state of the granular filter medium 36. However, the granular filter material 27 shown in FIG. 4A remains as it is. The distance between the granular filter medium 36 and the filter bed 25 is c (a
<B <c). Next, in FIG. 4 [E], the circulation pump 16
When the flow rate of the water discharged from is decreased from α to 0 as the flow rate from time t1 to t2 in FIG. 3 decreases, the granular filter medium 36 in FIG. 4D descends to the granular filter medium 37. And time is t in FIG.
3, the water discharged from the circulation pump 16 flows in the water flow direction 38 at the flow rate α at time t3 in FIG.
The granular filter material 27 of [D] changes to the state of the granular filter material 39 of FIG. 4E. The distance between the granular filter material 39 and the filter bed 25 is c (c
m) (a <b <c).

In FIG. 5, components 14 to 23 are shown in FIG.
Is the same as The circulation pump 16 is provided with a supply operation control means 40 that controls the circulation pump 16 to stop and flow the water flowing from the bathtub 14. Filter tank 2
0 discharge means 41 for discharging the water in the bathtub 14 whose interior has been washed
Is connected to the upper part of the filter tank 20. In addition, the filtration tank 20
The discharge means 41 is provided with the temperature detecting means 43 for detecting the temperature as well as the turbidity detecting means 42 for detecting the turbidity of the water in the bath 14 whose interior is washed. A heating means 44 for heating the water in the bathtub 14 is provided in the pipe between the discharge side 18 and the three-way valve (A) 19.

Next, the operation of the third invention will be described. From FIG. 3, FIG. 4 [D] [E] and FIG. 5, the three-way valve (A) 19 and the three-way valve (B) 21 are installed in the bathtub 14 immediately after the circulation filtration of the water in the bathtub 14 by the filtration tank 20 is completed. In a state where water is opened so as to pass through the return pipe 15 and branch from the outflow pipe 22 to the cleaning pipe 23 and flow into the filtration tank 20,
When the circulation pump 16 operates, the water in the bathtub 14 returns to the return pipe 1
5, it passes through the going pipe 22 and the washing pipe 23 and reaches the filtration tank 20. At this time, when the supply operation control means 40 is simultaneously operated, the water in the bathtub 14 that has reached the filtration tank 20 changes to a large flow rate α and a flow rate 0 as shown in FIG. 3 (the large flow rate α is the same as the large flow rate in FIG. 2). is there).

Immediately before the water in the bath 14 reaches the filtration tank 20, the granular filtration material in the filtration vessel 20 is the granular filtration material 2 shown in FIG.
It is in the state of 6, 27. Bath 14 in the filtration tank 20
4 flows in the direction of the water flow 35 of FIG. 4 [D] at the large flow rate α (time t1) of FIG. 3, the granular filter medium 26 of FIG. 4 [A] is used.
Changes to the state of the granular filter medium 36 in FIG. Next, the flow rate of the water in the bathtub 14 changes to 0 as the time advances to t2 as shown in FIG. 3, and the granular filter medium 36 of FIG. 4 [D] descends to the granular filter medium 37 of FIG. 4 [E]. Then, after a lapse of time t2, the flow rate again changes to a large flow rate α as time t3 elapses,
4E flows into the filtration tank 20 in the direction of the water flow 38 of FIG. 4E, and the granular filter material 27 of FIG. 4D changes to the state of the granular filter material 39 of FIG. 4E. 4 [A] of the fixed granular filter material 28 is disassembled and washed.

Next, an embodiment corresponding to the fourth invention will be described with reference to the attached FIGS. FIG. 6 is a flow chart showing the mechanism of the supply operation control means 40 of FIG. The turbidity transmitted in judgment x is compared with the arbitrarily set constant turbidity, and if the transmitted turbidity is equal to or higher than the fixed turbidity, the instruction y is executed until the turbidity is less than the fixed turbidity. Then, the command z is executed when the turbidity becomes less than a certain level.
If the transmitted turbidity is less than the certain turbidity, the command z is executed.

Next, the operation of the fourth invention will be described. 5 and 6, immediately after the circulation filtration of the water in the bath 14 by the filtration tank 20 is completed, the three-way valve (A) 1
9. The circulation pump 16 operates while the three-way valve (B) 21 is opened so that the water in the bathtub 14 passes through the return pipe 15 and branches from the going pipe 22 to the cleaning pipe 23 and flows into the filtration tank 20. Then, the water in the bathtub 14 is returned to the return pipe 15, the outflow pipe 22,
It reaches the filtration tank 20 through the cleaning pipe 23. Then, the water in the bathtub 14 passes through the inside of the filtration tank 20 and is discharged from the discharging means 41. At the same time, the turbidity detecting means 42 detects the turbidity of the discharged water in the bathtub 14 and sends the detection signal to the supply operation starting / stopping means. In FIG. 6, the turbidity transmitted from the turbidity detecting means 42 is compared with a predetermined turbidity that is arbitrarily determined. If the turbidity is less than the predetermined turbidity, the command z is executed and the operation of the supplying means 16 is stopped. .

Next, an embodiment of the fifth invention will be described with reference to the attached FIGS. FIG. 7 is a flow chart showing the mechanism of the heating means of FIG. In the determination x, the temperature transmitted is compared with the arbitrarily set constant temperature, and if the transmitted temperature is less than the constant temperature,
The instruction y is executed, and the instruction x is executed when the transmitted temperature exceeds a certain temperature.

Next, the operation of the fifth invention will be described. 5 and 7, immediately after the circulation filtration of the water in the bath 14 by the filtration tank 20 is completed, the three-way valve (A) 1
9. When the circulation pump 16 is operated while the three-way valve (B) 21 is opened so that the water in the bathtub 14 passes through the return pipe 15 and branches from the going pipe 22 to the cleaning pipe 23 and flows into the filtration tank 20. The water in the bathtub 14 reaches the filtration tank 20 through the return pipe 15, the outflow pipe 22, and the cleaning pipe 23. And bathtub 1
The water of No. 4 passes through the inside of the filtration tank 20 and is discharged from the discharging means 41. At the same time, the temperature detecting means 43 detects the temperature of the water in the discharged bath 14 and sends the detection signal to the heating means 45. In FIG. 7, the temperature transmitted from the temperature detecting means 43 is compared with a predetermined constant temperature. If the temperature is lower than the predetermined temperature, the instruction y is executed and the heater in the heating means is operated to keep the temperature constant. Washing is performed with the water in the bathtub 14 heated to a constant temperature.

[0033]

As is apparent from the above description, the water purifying apparatus of the present invention has the following effects.

(1) According to the first aspect of the invention, the washing water is changed into a large flow rate and a small flow rate, the difference in water pressure is transmitted to the entire filter medium, and the filter medium is varied to wash every corner of the filter medium. According to the second aspect of the present invention, the cleaning water is the water to be purified, so that the cleaning water and the supply means for supplying the cleaning water are reduced to reduce the cost. be able to.

(3) According to the third aspect of the present invention, the washing water is changed to a large flow rate and stopped, the difference in water pressure is transmitted to the entire filter medium, and the filter medium is greatly changed to shorten the filter medium washing time. Can be planned.

(4) According to the invention described in claim 4, the turbidity detecting means detects that the turbidity is that the inside of the filtering means is not contaminated, and it is judged that the cleaning operation is not performed. Saving of purified water can be realized without discharging various purified water.

(5) According to the invention of claim 5, by cleaning the filter medium with heated water to be purified, the substance to be purified attached to the filter medium is melted and separated from the filter medium to remove the initial state of the filter medium. Even if it returns to a state and carries out filtration operation for many years, the initial purification capacity can be maintained.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a cleaning state of a water purifier according to an embodiment of the first and second inventions.

FIG. 2 is a graph showing the relationship between cleaning flow rate and time of the same device.

FIG. 3 is a graph showing the relationship between the cleaning flow rate and time of the same device.

FIG. 4 is an explanatory diagram showing a change in a filter medium state due to a change in a flow rate when cleaning the filter medium of the same apparatus.

FIG. 5 is a system configuration diagram showing a cleaning state of the water purifier in one embodiment of the third to fifth inventions.

FIG. 6 is a flowchart showing a mechanism of operation of the supply operation control means 40 of FIG.

FIG. 7 is a flowchart showing a mechanism of operation of the heating means 44 of FIG.

FIG. 8 is a system configuration diagram of a conventional water purification device.

[Explanation of symbols]

 14 Bathtub 15 Return pipe 16 Supply means (circulation pump) 17 Suction side 18 Discharge side 19 Three-way valve (A) 20 Filtration means (filtration tank) 21 Three-way valve (B) 22 Forward pipe 23 Cleaning pipe 24 Supply flow rate varying means 40 Supply Operation control means 41 Ejection means 42 Turbidity detection means 43 Temperature detection means

Front page continuation (72) Inventor Takemi Oketa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A filtering means for filtering contaminants of water to be purified, a cleaning pipe connected to the filtering means, and a supply means for supplying cleaning water for cleaning the filtering means through the cleaning pipe. A water purifying device comprising: a supply flow rate varying means for varying the supply flow rate of the supply means. 2. The water purifying apparatus according to claim 1, wherein the cleaning water is water to be purified. 3. A supply means for filtering the contaminants of the water to be purified, a cleaning pipe connected to the filtering means, and a supply for supplying the purified water for cleaning the filtering means through the cleaning pipe. And a supply operation control means for starting and stopping the supply flow rate of the supply means. 4. A supply means for filtering the contaminants of the water to be purified, a cleaning pipe connected to the filtering means, and a supply for supplying the purified water for cleaning the filtering means through the cleaning pipe. Means, a discharging means for discharging the purified water after cleaning the filtering means, a turbidity detecting means for detecting the turbidity of the purified water after cleaning the filtering means, and the turbidity detection A water purification device comprising a supply operation control means for operating the supply means in response to a signal from the means. 5. A supply for supplying the purification means for filtering contaminants of purified water, a cleaning pipe connected to the filtration means, and the purified water for cleaning the filtration means through the cleaning pipe. Means, a discharging means for discharging the purified water after cleaning the filtering means, a temperature detecting means for detecting the temperature of the purified water after cleaning the filtering means, and a signal of the temperature detecting means And a heating means for heating the water to be purified.