JP3815531B2 - Regenerative water purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a regenerative water purification apparatus that purifies and sterilizes raw water such as tap water and groundwater and supplies purified water.
[0002]
[Prior art]
Conventionally, as this type of regenerative water purifier, the applicant has already proposed the one described in JP-A-9-1130.
[0003]
This regenerative water purifier has an adsorption part formed of conductive activated carbon in a septic tank. Tap water is passed through this adsorption part to remove the mold odor, salty odor, trihalomethane, microorganisms, etc. of tap water. It captures and feeds clean water to faucets.
[0004]
When the adsorbing action of such an adsorbing part is for a long time, it is necessary to regenerate the adsorbing part because organic substances or the like adhere and cause clogging in the adsorbing part or bacteria grow.
[0005]
When carrying out this regeneration operation, first, tap water is drawn into an aspirator (aspirator) connected to the septic tank, and the water in the septic tank is drained by using the septic tank side as a negative pressure (drainage process). Next, an alternating current is applied to each electrode to electrically heat the adsorption part, and organic substances adhering to the adsorption part are desorbed or bacteria are sterilized (desorption process). During this desorption process, tap water is drawn into the aspirator at regular intervals, and the outside air is introduced into the septic tank with the septic tank side set to a negative pressure. Thereby, the organic substance etc. which have desorbed from the adsorption part are sucked into the aspirator and exhausted (exhaust process). Such an exhausting process in the desorption process is repeated a plurality of times to remove organic substances and the like from the adsorbing part and dry and regenerate the adsorbing part to prepare for the next purified water generation process.
[0006]
[Problems to be solved by the invention]
The conventional regenerative water purifier uses the tap water flow drawn into the aspirator to dry and regenerate the adsorbing portion in the septic tank in the exhaust process, so that the exhaust efficiency is the tap water flow (flow rate). Will be greatly affected.
[0007]
By the way, the tap water pressure differs depending on the area (local government) where the water supply facility is installed, and even when using the water supply facility in the same area, it depends on whether the place of use is high. Furthermore, even when water is once pumped into a water storage tank on the roof and distributed to each room, as in a high-rise apartment, in places where the installation location is far from the main pipe, this is also caused by pipe resistance. The water supply pressure becomes low.
[0008]
Thus, in the conventional regenerative water purifier, when used at a high place where the tap water pressure is low, the flow rate flowing to the aspirator is reduced, and the suction force of the aspirator is reduced, so that the exhaust becomes insufficient and the adsorbing part There is a problem that the reproduction efficiency of the recording medium decreases.
[0009]
An object of the present invention is to provide a regenerative water purifier capable of reliably drying and regenerating an adsorbing section in a septic tank even when the flow rate of raw water to the suction / discharge means is small in view of the conventional problems.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a purified water generation means for generating purified water by passing raw water such as tap water through a septic tank in which an adsorption unit such as conductive activated carbon is accommodated, and an adsorption unit. Desorption means for sterilizing organic substances adhering to the adsorbing part and sterilizing bacteria, etc. by electrically heating, and suction discharge means for drawing in raw water and sucking and discharging water and air in the septic tank by suction force associated with passing water In a regenerative water purifier that operates the desorption means and the suction / discharge means to discharge the organic matter desorbed from the adsorption section and regenerates the adsorption section, the flow rate for detecting the flow rate of raw water drawn into the suction / discharge means While having a detection means, it has the structure which has a control means which controls the working time of a suction discharge means based on the detection flow volume of a flow volume detection means.
[0011]
According to the first aspect of the invention, when the detected flow rate of the flow rate detecting means, for example, the detected flow rate is small, the operation time of the suction / discharge means is set longer. As a result, the suction time by the suction and discharge means is increased by the length of the operation time, and the organic matter in the septic tank can be reliably discharged.
[0012]
As the long time setting of the operation time, the operation time per operation may be lengthened as in the invention of claim 2 or the operation frequency may be increased as in the invention of claim 3.
[0013]
On the other hand, in the invention according to claim 4, there is provided a flow rate detection means for detecting the flow rate of the raw water drawn into the suction / discharge means and a control means for controlling the electric heating temperature of the desorption means based on the detected flow rate of the flow rate detection means. It has become.
[0014]
According to the invention of claim 4 and claim 5, when the detected flow rate of the flow rate detecting means is small, for example, the electric heating temperature of the desorbing means is set high. As a result, the desorption of organic substances and the like from the adsorbing portion is promoted as the electric heating temperature increases.
[0015]
The invention of claim 6 has a structure in which control is performed using both the operation time control of the suction / discharge means according to claim 1 and the electric heating temperature control of the desorption means of claim 4. Thereby, the reproduction | regeneration capability of an adsorption | suction part is further improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
1 to 7 show a first embodiment of a regenerative water purifier according to the present invention, FIG. 1 is a water circuit diagram of the regenerative water purifier, FIG. 2 is a cross-sectional view showing the structure of an aspirator, and FIG. FIG. 4 is a block diagram showing the control circuit of the regenerative water purifier, FIG. 5 is a time chart of the regeneration process step, and FIG. 6 is a time chart of the regeneration process step. 2 and 7 are control flowcharts of the reproduction processing step.
[0017]
The water circuit of the regenerative water purifier will be described with reference to FIG. This regenerative water purifier has a septic tank A and a faucet B connected by piping. This septic tank A has a water supply valve (electromagnetic valve configuration) SV on its inlet side, and raw water (tap water) flows through this water supply valve SV. On the other hand, the raw water that has flowed into the septic tank A is purified inside and supplied to the faucet B.
[0018]
Here, the septic tank A has an adsorbing part 1 formed of conductive activated carbon or the like inside, and the adsorbing part 1 captures the musty odor, salty odor, trihalomethane, microorganisms, and the like of the raw water to produce purified water ( Water purification treatment). In addition, a pair of electrodes 2a and 2b are disposed above and below the adsorption unit 1, and an organic voltage adhered to the adsorption unit 1 is generated by generating Joule heat in the adsorption unit 1 by applying an alternating voltage to the electrodes 2a and 2b. Is removed while microorganisms and the like are sterilized (regeneration treatment). Moreover, the temperature sensor TS is installed in the septic tank A, and the temperature of the adsorption part 1 is detected by this temperature sensor TS. Further, the septic tank A communicates with the atmosphere through a check valve CV1.
[0019]
During the regeneration process of the adsorption unit 1, water in the septic tank A is drained, and a suction device (aspirator) 3 is used as the drainage device. Although this aspirator 3 is already known, as shown in FIG. 2, the first inlet 31 thereof is connected to the septic tank A via the check valve CV2, and the water in the septic tank A is supplied to the first inlet 31. Inflow from. Moreover, the 2nd inlet 32 of the aspirator 3 is connected to the water pipe, and the water in the septic tank A is sucked to the aspirator 3 side by the suction force accompanying the inflow of tap water. Further, a drain valve (electric valve configuration) MV is provided on the downstream side of the outlet 33 of the aspirator 3, and discharge of water and the like in the septic tank A is controlled by the drain valve MV. Furthermore, a flow rate sensor (FS) for detecting the amount of tap water passing is installed upstream of the aspirator 3. The exhaust amount of the septic tank A by the aspirator 3 is shown in FIG. 3, and as is clear from FIG. 3, the exhaust amount increases and decreases in proportion to the water flow rate of the aspirator 3.
[0020]
Next, the drive control circuit of the regenerative water purifier according to this embodiment will be described with reference to the block diagram of FIG.
[0021]
The regenerative water purifier according to this embodiment is automated by including a control device 4 such as a microcomputer. The control device 4 includes a central processing unit (CPU) 41 and a memory 42 that stores a control program. The control device 4 has I / O ports 43 and 44. The I / O port 43 inputs and outputs signals between the control device 4 and the timer TM, the flow rate sensor FS, and the temperature sensor TS. On the other hand, the I / O port 44 inputs and outputs signals between the control device 4 and the water supply valve SV, drain valve MV, and electrode AC power supply AC. Reproduction processing control is performed based on this control device 4.
[0022]
This reproduction processing control will be described with reference to the time charts of FIGS. 5 and 6 and the flowchart of FIG.
[0023]
When bacteria and the like grow on the adsorbing unit 1 due to the continuation of the water purification treatment, the process proceeds to a regeneration treatment step. When shifting to this regeneration treatment step, whether or not water purification is being performed (whether or not faucet B is opened and whether or not water purification is used) is detected by opening / closing the water supply valve SV, and the water supply valve SV is closed. If it is, the process proceeds to the regeneration processing step (S1).
[0024]
In this regeneration treatment step, the drainage step is first started (S2). This draining step is performed over a time T1 during which the water in the septic tank A can be drained, and the drain valve MV is opened over the time T1. Tap water flows into the aspirator 3 along with the opening of the drain valve MV, and a suction force acts on the tap water to draw water in the septic tank A into the aspirator 3. Thereby, the water in the septic tank A is drained. The flow rate of tap water flowing into the aspirator 3 is detected by a flow rate sensor FS.
[0025]
When this drainage process is completed, the process proceeds to the desorption process (S4). When entering this desorption process, it is determined whether or not the detected flow rate is smaller than the lower limit flow rate CL shown in FIG. 3 (S3). When the flow rate is higher than the lower limit flow rate CL in this determination, that is, when the flow rate is sufficient to drain the water in the septic tank A, first, the drain valve MV is closed and an AC voltage is applied to each electrode 2a, 2b. To do. Due to this voltage application, Joule heat is generated in the adsorption unit 1, and the adsorption unit 1 is heated and dried at a set temperature t1 (95 ° C.). This heat drying is performed for a time T2, and organic substances adhering to the adsorption unit 1 are desorbed and bacteria and the like are sterilized.
[0026]
During this desorption process, the exhaust process operates at a constant interval T2. In this exhaust process, the drain valve MV is opened over time T3. As a result, the tap water flows into the aspirator 3 in the same manner as in the drainage process, and outside air is introduced into the adsorption unit, and organic substances and the like desorbed from the adsorption unit 1 are sucked into the aspirator 3 and together with the tap water. To be discharged. Such an exhausting process is repeated n times as shown in FIG. 5 to completely discharge organic substances and the like in the adsorption unit 1 (S5).
[0027]
On the other hand, in the determination of the detected flow rate, when the flow rate is smaller than the lower limit flow rate CL (when the suction force of the aspirator 3 is small), the control in steps 6 and 7 is performed. That is, in the desorption process, the adsorption unit 1 is heated and dried in the same manner as in Step 4, and in the exhaust process, the drain valve MV is opened, and tap water is allowed to flow through the aspirator 3 over time T4 (S6). Here, as shown in FIG. 6, the time T4 is set longer than the time T3 of step 5, and the flow rate of the tap water flowing through the aspirator 3 is increased by this longer setting. For this reason, the detachment | desorption etc. of the organic substance from the adsorption | suction part 1 do not fall. Such an exhausting process is repeated n times to discharge organic substances and the like from the adsorption unit 1 (S7).
[0028]
When this desorption process is completed, the process proceeds to the cleaning process (S8). In this cleaning process, the water supply valve SV and the drain valve MV are opened over time T5, and the tap water flows into the septic tank A. The inflowing tap water cleans organic matter and the like still adhering to the adsorbing unit 1, and the cleaning water flows to the aspirator 3 and is discharged. Upon completion of this cleaning process, the regeneration process ends.
[0029]
As described above, according to the present embodiment, when the tap water pressure is low and the aspirator 3 cannot secure the lower limit flow rate CL, the evacuation process time is set longer than usual to prevent the organic substance desorption efficiency and the sterilization effect from being lowered. ing.
[0030]
8 and 9 show a second embodiment of the regenerative water purifier. In this second embodiment, the opening and closing of the water supply valve (S1), the drainage step (S2), the flow rate determination (S3), the desorption step when the flow rate C is higher than the lower limit flow rate CL (including the exhaust step) (S4), The number of repetitions of the evacuation process (S5), the desorption process (including the evacuation process) when the flow rate C is lower than the lower limit flow rate CL (S6), and the cleaning process (S8) are all the same as the first embodiment. It is the same.
[0031]
The difference between the present embodiment and the first embodiment is that when the flow rate C is less than the lower limit flow rate CL, the number of repetitions of the exhaust process is “n + 1 <times” (S7). By increasing the number of repetitions of the evacuation process in this way, a decrease in the organic substance desorption efficiency is prevented. Other configurations and operations are the same as those in the first embodiment.
[0032]
10 and 11 show a third embodiment of the regenerative water purifier. In the third embodiment, the opening and closing of the water supply valve (S1), the drainage step (S2), the flow rate determination (S3), the desorption step when the flow rate C is higher than the lower limit flow rate CL (including the exhaust step) (S4), Any of the number of repetitions of the evacuation process (S5), the desorption process (including the evacuation process) when the flow rate C is lower than the lower limit flow rate CL, the number of repetitions of the evacuation process (S6, S7), and the cleaning process (S8) The steps are also the same as in the first embodiment.
[0033]
The difference between the present embodiment and the first embodiment is that when the flow rate C is less than the lower limit flow rate CL, as shown in FIG. 11, the set temperature of the adsorption unit 1 is raised in the desorption step, and the set temperature t2 ( 110 ° C.). By increasing the heating temperature in this manner, the organic substance desorption efficiency is prevented from decreasing. Other configurations and operations are the same as those in the first embodiment.
[0034]
In each of the above embodiments, when the flow rate to the aspirator 3 is small, the operating time of the exhaust process is lengthened, or the heating temperature of the desorption process is increased to prevent the desorption efficiency from decreasing. When the operating time is lengthened and the heating temperature is increased, the desorption efficiency is improved and the regeneration ability is improved.
[0035]
【The invention's effect】
As described above, according to the present invention, when the amount of tap water or the like flowing into the suction / discharge unit decreases, the suction unit is removed by controlling the operation time of the suction / discharge unit and the heating temperature of the suction unit. This prevents a decrease in separation efficiency.
[Brief description of the drawings]
FIG. 1 is a water circuit diagram of a regenerative water purifier according to the first embodiment. FIG. 2 is a cross-sectional view showing a structure of an aspirator of the regenerative water purifier according to the first embodiment. FIG. 4 is a block diagram showing a drive control circuit of a regenerative water purifier according to the first embodiment. FIG. 5 is a regeneration diagram according to the first embodiment. Of the time chart of the regeneration treatment process of the water purification system
FIG. 6 is a time chart 2 of the regeneration treatment process of the regenerative water purifier according to the first embodiment.
FIG. 7 is a control flowchart of a regeneration treatment process of the regenerative water purification apparatus according to the first embodiment. FIG. 8 is a time chart of a regeneration treatment process of the regenerative water purification apparatus according to the second embodiment. FIG. 10 is a control flowchart of the regeneration process of the regenerative water purification apparatus according to the third embodiment. FIG. 11 is a control flowchart of the regeneration process of the regenerative water purification apparatus according to the third embodiment. Graph to show 【Explanation of symbols】
A ... septic tank, FS ... flow rate sensor, TS ... temperature sensor, 1 ... adsorption part, 2a, 2b ... electrode, 3 ... aspirator, 4 ... control device.

Claims (6)

Purified water generating means for generating purified water by passing raw water such as tap water through a septic tank in which an adsorbing part such as conductive activated carbon is housed, and desorption of organic substances adhering to the adsorbing part and bacteria A detaching means for sterilizing water and the like, and a suction / discharge means for sucking and discharging the water and air in the septic tank by suction of raw water by suction. In the regenerative water purifier that operates and discharges organic matter and the like desorbed from the adsorption unit and regenerates the adsorption unit,
A regenerative water purifier having a flow rate detection means for detecting the flow rate of raw water drawn into the suction / discharge means, and a control means for controlling the operation time of the suction / discharge means based on the detected flow rate of the flow rate detection means. apparatus. 2. The regenerative water purifier according to claim 1, wherein when the raw water flow rate is less than a predetermined amount of water, the control unit sets a long operation time per one time of the suction / discharge unit. The regenerative water purifier according to claim 1, wherein the control means increases the number of times of operation of the suction / discharge means when the raw water flow rate is less than a predetermined amount of water. Purified water generating means for generating purified water by passing raw water such as tap water through a septic tank in which an adsorbing part such as conductive activated carbon is housed, and desorption of organic substances adhering to the adsorbing part and bacteria A detaching means for sterilizing water and the like, and a suction / discharge means for sucking and discharging the water and air in the septic tank by suction of raw water by suction. In the regenerative water purifier that operates and discharges organic matter and the like desorbed from the adsorption unit and regenerates the adsorption unit,
A regenerative type comprising flow rate detection means for detecting the flow rate of raw water drawn into the suction / discharge means, and control means for controlling the electric heating temperature of the desorption means based on the flow rate detected by the flow rate detection means. Water purification device. The regenerative water purifier according to claim 4, wherein the control means sets the electric heating temperature high when the raw water flow rate is smaller than a predetermined water amount. Purified water generating means for generating purified water by passing raw water such as tap water through a septic tank in which an adsorbing part such as conductive activated carbon is housed, and desorption of organic substances adhering to the adsorbing part and bacteria A detaching means for sterilizing water and the like, and a suction / discharge means for sucking and discharging the water and air in the septic tank by suction of raw water by suction. In the regenerative water purifier that operates and discharges organic matter and the like desorbed from the adsorption unit and regenerates the adsorption unit,
A flow rate detection means for detecting the flow rate of the raw water drawn into the suction / discharge means, and a control means for controlling the operating time of the suction / discharge means and the electric heating temperature of the desorption means based on the detected flow rate of the flow rate detection means. A regenerative water purifier characterized by comprising:

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