JP4228410B2 - Water treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water treatment device that feeds water from a water supply source through a filter and then supplies it from a water outlet. Specifically, the present invention relates to a water treatment device that mixes saline with water supplied from a water supply source and then passes the water through a filter. The present invention relates to a water treatment apparatus that generates hypochlorous acid by electrolysis in an electrolytic cell after water.
[0002]
[Prior art]
In the conventional water treatment equipment, when the total water flowed through the filter made of hollow fiber etc. exceeds the specified water volume, a replacement notice is displayed, and the life of the filter is approaching to the user or maintenance person. The exchange was urged.
[0003]
[Problems to be solved by the invention]
However, in the conventional water treatment apparatus, the turbidity value of the water to be passed is high (the water is dirty) because there is only one stipulated amount of water to perform the filter replacement notice regardless of the state of the water to be passed. If the flow rate detected by the water flow sensor is below the minimum flow rate required for the operation of the water treatment device, the system will stop. There was a risk that the system would stop without displaying.
[0004]
On the other hand, in order to prevent the above-mentioned problems, if the specified water volume for the filter replacement notice is made small, the filter replacement notice will be performed and the filter will be replaced even though the filter has a sufficient life span. There was a problem such as
[0005]
[Means for solving the problems and their functions and effects]
In order to solve the above-described problem, the water treatment device according to the first aspect of the present invention supplies water from a water supply source through a filter and then supplies the water from a water outlet. A water treatment apparatus having a control means for notifying a filter replacement when a threshold value is exceeded, further comprising a water amount sensor for detecting the flow rate flowing through the filter, the control means corresponding to the total water flow amount of two or more points Based on the change in the flow rate signal from the water volume sensor, the total flow rate that is predicted to be less than the flow rate that is the lifetime of the filter is calculated, and the calculated total flow rate is calculated. Based on this, the threshold value used for the judgment of the filter replacement notice is changed.
[0006]
The water treatment device according to the second aspect of the present invention supplies water from a water supply source through a filter and then supplies the water from a water outlet, and when the water passing time to the filter exceeds a threshold value. A water treatment apparatus having a control means for performing filter replacement notice is provided with a water amount sensor for detecting a flow rate flowing through the filter, and the control means includes two or more water passage times and the corresponding water amount sensors from the water amount sensor. based on the change of the flow signal, the flow rate through the filter calculates a water flow time which is expected to be passing water flow rate below a lifetime of the filter, the filter replacement warning based on the calculated water flow time It is characterized in that the threshold value used for the determination is changed.
[0007]
In this way, the change over time in the clogged state of the filter based on the total flow rate or flow time of two or more points and the corresponding change in the flow rate signal from the water flow sensor is referred to as the total flow rate or flow time. Accurate judgment can be made on the basis of actual equipment usage. Then, the time when the filter is clogged and the flow rate flowing through the filter is predicted to be less than the water flow rate that is the life of the filter is predicted from the change over time in the clogged state of the filter. Since the threshold value used for determining the replacement notice can be changed, the filter replacement notice can be given at an appropriate time according to the degree of contamination of the filter.
[0011]
In addition, the control means uses a total flow rate that is predicted that the flow rate that flows through the filter detected by the water amount sensor is equal to or less than the flow rate that is the life of the filter, as a threshold value that is used for determination of filter replacement notice. If the value obtained by subtracting the predetermined amount is calculated, the filter replacement advance notice can be determined on the basis of the total usage amount according to the actual usage, and therefore the filter replacement advance notice can be performed at an accurate time.
[0012]
Furthermore, if the water treatment device has a mixing section for mixing saline on the upstream side of the filter, and has an electrolytic cell on the downstream side of the filter, the water treatment device can be used before reaching the minimum usable flow rate of the electrolytic cell. Filter replacement notice can be made at an appropriate time.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is an overall configuration diagram of an electrolyzed water generating apparatus 1 as a water treatment apparatus according to the first aspect of the present invention. A certain amount of clean water is supplied to the mixing unit 5 via the valve unit 3 and the water amount sensor 4 containing the solenoid valve, constant flow valve and safety valve, with respect to the electrolytic cell 2 housed in the electrolyzed water generator 1. . In addition, by supplying the saline stored in the saline tank 6 to the mixing unit 5 by the pump 7, a predetermined concentration of saline is supplied to the electrolytic cell 2 through the filter 8 formed of a hollow fiber.
[0015]
Here, in this embodiment, since the purpose is to generate weakly acidic water having a hypochlorous acid concentration of about 10 ppm in the electrolytic cell 2 in the pH range of about 5-7, On the other hand, by supplying 20% saline from the saline tank to the 18 cc / min mixing section, a saline solution having a concentration of 1000 ppm is formed, and this saline solution is set to be supplied to the electrolytic cell 2. .
[0016]
Then, the saline supplied to the electrolytic cell 2 is supplied with a constant current of 7 amperes from the controller 9, and the saline solution having a concentration of 1000 ppm is electrolyzed in the electrolytic cell 2, so that the acidic water (about 10 ppm next (Including chlorous acid) and alkaline water are generated, and each is discharged from the acidic water outlet and the alkaline water outlet through the passage switching valve.
[0017]
A method for calculating the replacement notice of the filter 8 will be described with reference to FIG. Two points of data when water of turbidity A is flowing (for example, flow rate Q0 = 3.8 L / min when total flow rate T0 = 5 tons and flow rate when total flow rate T1 = 10 tons) The approximate expression is calculated from the water flow rate Q1 = 3.6 L / min), and the total water flow rate at which the water flow rate Q that is the life of the filter 8 is 3 L / min is calculated. Here, it is calculated as 45 tons. Therefore, if the display or notification of the notice is performed from a point where the predetermined flow rate is less than 45 tons (for example, when the total water flow is 40 tons), an appropriate notice can be given.
[0018]
The specific contents of the threshold value calculation method used for the replacement notice of the filter 8 will be described based on the flowchart of FIG. The contents of the flowchart are stored in the controller 9 as control means.
[0019]
When the electrolyzed water generating apparatus 1 is installed and energized, 50 tons is set as a default value for the notice detection threshold value TB of the filter 8 (S101). Here, 50 tons of TB is a value obtained by subtracting 5 tons from a total flow rate of 55 tons where the water flow rate is 3 L / min when used in general water quality.
[0020]
When it is determined by the water amount sensor 4 that the predetermined flow rate (5 tons in this embodiment) has passed through the electrolyzed water generating device 1 (S102Y), the water flow rate Q0 and the corresponding total water flow amount T0 are registered. If it is determined whether or not it is registered (S103N), the water flow rate Q at that time is registered as Q0, and the corresponding total water flow rate TQ is registered as T0 (S104). ).
[0021]
Then, it is determined whether or not the total water flow rate TQ is equal to or greater than the registered T0 + 5 tons (S105). If it is determined that the total water flow rate TQ is equal to or greater than T0 + 5 tons (S105Y), the water flow rate Q at that time is again set to Q1. And the corresponding total water flow rate TQ is registered as T1 (S106), and an approximate expression is obtained from the two-point data of these registered water flow rates Q0 and Q1 and the total water flow rates T0 and T1. The total water flow rate TQ at which the water flow rate Q that is the life of the filter 8 is 3 L / min is calculated as TA from the approximate expression.
[0022]
Here, specifically, when water of turbidity A in FIG. 2 is passed, Q0 = 3.8 L / min, T0 = 5 tons, Q1 = 3.6 L / min, and T1 = 10 tons. The total water flow amount TA at which the water flow rate Q that is the life of the filter 8 is 3 L / min is calculated to be 45 tons.
[0023]
Therefore, the notice detection threshold value TB of the filter 8 is updated to a value obtained by subtracting 5 tons from TA instead of the value set as the default value (at the time of passing turbidity A in FIG. 2). 40 tons are updated as TB).
[0024]
Then, it is determined whether or not the total water flow amount TQ is larger than the updated notice detection threshold value TB of the filter 8 (S109). If it is determined that it is larger (S109Y), the replacement notice notification of the filter 8 is started. (S110) When the notice notification has started (111Y), the update of the notice detection threshold of the filter 8 is finished (S112).
[0025]
On the other hand, if it is determined in S109 that the total water flow amount TQ is not larger than the updated notice detection threshold value TB of the filter 8 (S109N), and if it is determined that the notice notification is not started (S111N), Q1 is set to Q1. The value of T1 is updated, and the value of T1 is updated as T0. Thereafter, the values of Q1 and T1 are cleared, the process returns to S102, and the process proceeds to the update process of the notice detection threshold value TB of the next filter 8.
[0026]
Specifically, 3.6 L / min is updated as Q0, 10 tons is updated as T0, and 3.4 L / min is registered as Q1 when the total water flow TQ reaches 15 tons in S105. 15 tons are registered as T1.
[0027]
In the description based on the above-described flowchart, the example in which the notice detection threshold value of the filter 8 is calculated from the total water flow rate at two points and the change in the water flow rate corresponding to the total water flow rate has been described. And the replacement notice detection threshold value of the filter 8 may be calculated from the water flow rate, and the replacement notice detection threshold value of the filter 8 may be the passage time instead of the total water flow amount. It is also possible.
[0028]
Next, the Example which concerns on the water treatment apparatus based on the 2nd side surface of this invention is described based on FIGS.
[0029]
FIG. 4 is an overall configuration diagram of the electrolyzed water generating apparatus 1 as a water treatment apparatus based on the second aspect of the present invention. A difference from FIG. 1 is that a turbidity sensor 10 is provided between the mixing unit 5 and the filter 8. The turbidity sensor 10 is provided with a light projecting element 11 and a light receiving element 12 as shown in FIG. 5, and the current value of the light receiving element 12 varies depending on the amount of received light. Therefore, the current value is converted into a current / voltage converter. 13, the turbidity is detected from the relationship shown in FIG.
[0030]
In the above configuration, when the sensor signal voltage of the turbidity sensor 10 is 2 volts, the turbidity of water is 4 from FIG. Here, from the relationship between the turbidity shown in FIG. 7 and the total water flow rate of 3 L / min, it can be seen that the total water flow rate corresponding to turbidity 4 is 40 tons. Therefore, since the hollow fiber can be used up to 40 tons with a turbidity of 4, it is possible to make a notice at an appropriate time by making the notice from about 35 tons, which is a predetermined flow rate lower than 40 tons.
[0031]
The specific contents of the threshold value calculation method used for the replacement notice of the filter 8 will be described based on the flowchart of FIG. The contents of the flowchart are stored in the controller 9 as control means.
[0032]
When the electrolyzed water generating apparatus 1 is installed and energized, 50 tons is set as the notice detection threshold value TB default value of the filter 8 (S201). Here, 50 tons of TB is a value obtained by subtracting 5 tons from a total flow rate of 55 tons where the water flow rate is 3 L / min when used in general water quality.
[0033]
When it is determined by the water amount sensor 4 that water has passed through the electrolyzed water generating device 1 at a predetermined flow rate (5 tons in this embodiment) (S202Y), the water flow rate Q0 and the corresponding total water flow amount T0 are registered. When it is determined whether or not it is registered (S203N), the total water flow rate TQ at that time is registered as T0 (S204).
[0034]
Then, it is determined whether or not the total water flow rate TQ is equal to or greater than the registered T0 + 5 tons (S205). If it is determined that the total water flow rate TQ is equal to or greater than T0 + 5 tons (S205Y), the total water flow rate TQ at that time is again set to T1. (S206), the turbidity is obtained from the signal voltage of the turbidity sensor 10 at the registered total water flow rate T1, and the water flow rate Q is 3 L / min from the turbidity based on FIG. The total water flow amount TQ is calculated as TA (S207).
[0035]
Here, specifically, since the turbidity is 4 when the detection voltage of the turbidity sensor 10 is 2 volts, the total water flow amount TA at which the water flow rate Q that is the life of the filter 8 is 3 L / min is used. It is calculated to be 40 tons.
[0036]
Therefore, the notice detection threshold value TB of the filter 8 is updated to a value obtained by subtracting 5 tons from TA instead of the value set as the default value (specifically, 35 tons is updated as TB). (S208).
[0037]
Then, it is determined whether or not the total water flow amount TQ is larger than the updated notice detection threshold value TB of the filter 8 (S209). If it is determined that it is larger (S209Y), the replacement notice notification of the filter 8 is started. (S210) When the notice notification is started (211Y), the update of the notice detection threshold value of the filter 8 is finished (S212).
[0038]
On the other hand, in S209, when it is determined that the total water flow rate TQ is not larger than the updated notice detection threshold value TB of the filter 8 (S209N), and when it is determined that the notice notification has not started (S211N), T0, T1 Is cleared, the process returns to S202, and the process proceeds to update processing of the next notice detection threshold value TB of the filter 8.
[0039]
In addition, in the above-mentioned Example, although what calculated the total water flow volume was demonstrated, it can also calculate a total water flow time.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a water treatment device according to the first aspect of the present invention. FIG. 2 is a diagram showing the relationship between the total water flow rate and the water flow rate. FIG. 3 is a water treatment device filter according to the first aspect. Flowchart of threshold calculation method used for replacement notice of water [FIG. 4] Overall configuration diagram of water treatment apparatus according to the second aspect of the present invention [FIG. 5] Schematic configuration diagram of turbidity sensor [FIG. Fig. 7 is a diagram showing the relationship between sensor signal and turbidity. Fig. 7 is a diagram showing the relationship between turbidity and filter life. Fig. 8 is a method for calculating a threshold value used in a filter for a water treatment device according to the second aspect. Flow chart [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electrolyzed water production | generation apparatus 2 ... Electrolytic tank 3 ... Valve unit 4 ... Water quantity sensor 5 ... Mixing part 6 ... Saline tank 7 ... Pump 8 ... Filter 9 ... Controller 10 ... Turbidity sensor

Claims (4)

In the water treatment apparatus provided with a control means for notifying the replacement of the filter when the water supply from the water supply source is supplied from the water outlet after passing through the filter and the total water flow amount to the filter exceeds a threshold value,
Comprising a water sensor for detecting the flow through the filter, the control means based on a change of the flow rate signal from the Sotsu water of more than two points the water sensor corresponding thereto, the flow rate through the filter is the A total water flow amount that is predicted to be equal to or lower than a water flow rate that is the life of the filter is calculated, and a threshold value that is used for determination of the filter replacement notice is changed based on the calculated total water flow amount. Water treatment equipment. In the water treatment apparatus provided with the control means for notifying the replacement of the filter when the water supply from the water supply source is supplied from the water outlet after passing through the filter and the water passing time to the filter exceeds a threshold value,
Comprising a water sensor for detecting the flow through the filter, the control means based on a change of the flow rate signal from the water sensors and the corresponding water passage time of the two or more points, the flow rate through the filter is the A water flow time that is predicted to be equal to or lower than a water flow rate that is the life of the filter is calculated, and a threshold value that is used for determination of the filter replacement notice is changed based on the calculated water flow time. Water treatment equipment. The control means determines a threshold value used for judgment of filter replacement notice from a total water flow rate that is predicted that a flow rate flowing through the filter detected by a water amount sensor is equal to or less than a water flow rate value that is a life of the filter. The water treatment device according to claim 1, wherein a value obtained by subtracting the fixed amount is calculated.   4. The water treatment apparatus according to claim 1, wherein the water treatment apparatus includes a mixing unit that mixes saline on the upstream side of the filter and an electrolytic cell on the downstream side of the filter. Water treatment equipment.

Images