JP4873791B2 - Electrode scale component precipitation suppression device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for suppressing the deposition of scale components from circulating water passing through a water pipe in a water circulation system in a cooling tower, a heat exchanger, a boiler, and the like.
[0002]
[Prior art]
In various water circulatory systems, components such as calcium and magnesium contained in the water precipitate and adhere to the inner wall of the water pipe and the inner wall of various devices connected to it as a scale. It is known that problems such as worsening occur.
[0003]
The scale component is precipitated because of a decrease in water solubility due to partial evaporation of the circulating water, and calcium and magnesium dissolved as ions in the water lose their activity or react with other components to precipitate. And factors such as crystallization.
[0004]
In order to solve the above problems, various devices have been developed. For example, JP-A-8-299899, JP-A-8-332499, JP-A-5-309393, etc. Water treatment equipment has been proposed.
[0005]
The electrode-type water treatment device is based on the principle that the electrodes are arranged opposite to each other through a space in the water circulation system, and a constant voltage is applied between these electrodes to suppress precipitation of scale components in the water. The current flowing between the electrodes is used to ionically activate the circulating water and suppress its precipitation.
[0006]
Among the above-mentioned electrode-type water treatment devices, the device according to Japanese Patent Application Laid-Open No. Hei 8-299899 has confirmed that the concentration of scale components in water and the electrical conductivity of water are proportional to each other by experiments and the like. A solution concentration detection means for indirectly detecting the concentration of scale components in water by detecting electrical conductivity is provided, and the scale component concentration detected by this detection means has reached a preset upper limit of concentration. In some cases, external water is replenished into the circulation system by the water replenishment control means to reduce the concentration of scale components in the water.
[0007]
However, since the apparatus performs the water treatment of the circulating water and the detection of the electric conductivity of the water using the same electrode, it is difficult to control with high accuracy. Specifically, since the electrical conductivity is detected by detecting changes in the current value flowing between the electrodes arranged opposite to each other, the electrical conductivity is accurately detected when an abnormality occurs in the electrodes. Therefore, there is a problem that water is replenished in the circulation system due to the erroneously detected electrical conductivity, or it is not replenished although it is necessary to replenish water. Moreover, although the electrical conductivity of circulating water also changes with the temperature of outside air, the said apparatus did not consider the change by the temperature of this outside air in the setting of an upper limit.
[0008]
On the other hand, the inventor of the present invention is that the scale component (crystal substance) of the circulating water is well dispersed through the test operation of the electrode-type water treatment apparatus as described above, because the voltage applied to the electrode (V ) And the current (A) flowing from the electrode to the water is found to be best dispersed when VA is about 1 to 4 VA.
[0009]
[Problems to be solved by the invention]
In view of the problems of the conventional electrode-type water treatment apparatus and the knowledge obtained by the inventors, the present invention provides a new scale component precipitation suppression apparatus that can optimally control the operation of the electrode-type water treatment apparatus. It is the main issue to provide
[0010]
[Means for Solving the Problems]
The configuration of the present invention, which has been made for the purpose of solving the above problems, has a pair of electrodes opposed to each other in a water pipe connected to a water circulation system, and a rectangular wave AC voltage is applied between these electrodes. In the electrode-type scale component deposition suppressing device that suppresses the deposition of the scale component in the circulating water by applying, a product (VA value) of the load voltage between the pair of electrodes and the measured current value (VA value) is set in advance from 1VA A control device for controlling in the range of 4 VA is provided.
[0011]
According to the present invention, when the range of the product (VA value) of the load voltage and the current value is 1 VA to 4 VA, the scale component deposited in the circulating water is not deposited. It has been confirmed that it is most efficiently dispersed. That is, the inventor expressed the relationship between the VA value of FIG. 3 and the dispersion ratio of the scale component in a diagram, and analyzed the diagram to determine the relationship between the VA value and the dispersion rate of the scale component. This is because it has been found that, when a voltage is applied between the electrodes, however, when the VA value exceeds a certain level, further dispersion cannot be expected.
[0012]
The voltage applied between the electrodes is an alternating rectangular wave. By applying this voltage, negative ions in the water are activated and the dispersion of the scale component is promoted. As shown in FIG. The data and the reduction in redox potential show a peak in the redox potential reduction rate in the vicinity of 3 VA. The peak in the redox atmosphere is near 3 VA, and the redox atmosphere is smaller before and after that. I understand.
[0013]
Therefore, in the present invention, the VA value of the environment in which the dispersion ratio of the scale component in water is high and the water oxidation-reduction atmosphere is increased at the same time is set in the range of 1 VA to 4 VA. In addition to controlling the voltage and current of the alternating rectangular wave to be applied, other control elements are detected within the range of the VA value to be controlled, and the entire apparatus of the present invention is controlled based on this detected value.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram schematically showing an example of an electrode-type scale component precipitation suppression device of the present invention, FIG. 2 is a block diagram showing details of a control device of the device shown in FIG. 1, and FIG. FIG. 4 is a diagram showing the relationship between the VA value and the oxidation-reduction potential decrease rate.
[0015]
1 and 2, reference numeral 1 denotes a water pipe of the electrode-type scale component precipitation suppressing device of the present invention inserted into a water passage in the water circulation system. This water pipe 1 is provided with a connecting flange 1a provided before and after the water pipe. , 1a is inserted into the water channel in the existing water circulation system. Reference numerals 2 and 3 denote a pair of electrodes disposed in the water pipe 1 so as to face each other at an appropriate interval. Connected to these electrodes 2 and 3 are connection terminals 2a and 3a that are electrically connected to the outside of the water pipe 1, respectively.
[0016]
4 is a control device for the scale component suppressing device of the present invention, which controls the AC voltage applied between the electrodes 2 and 3 or measures the current flowing between the electrodes 2 and 3 to detect abnormal conditions. This is for adding various operations to the apparatus, details of which will be described later. Reference numeral 5 denotes an electrical conductivity sensor provided in the water pipe 1, and the sensor portion 5 a is provided so as to be always in contact with circulating water flowing in the water pipe 1. A temperature sensor 6 is also provided in the water pipe 1, and the sensor portion 6 a is provided so as to be always in contact with the circulating water flowing in the water pipe 1. These electrical conductivity sensor 5 and temperature sensor 6 are each electrically connected to the control device 4.
[0017]
Reference numeral 7 denotes an automatic valve provided at an appropriate location in a water circulation system (water passage) into which the device of the present invention is inserted. The automatic valve 7 is electrically connected to the control device 4, and the water circulation is controlled by a control output from the control device 4. It functions as an open / close valve for a water supply path for supplying water into the system, or as an open / close bubble for discharging water in the circulation system and supplying new water.
[0018]
Reference numeral 8 denotes a personal computer (hereinafter referred to as a personal computer) connected to the control device 4, which sets an output voltage, an output current, etc., and also detects the water temperature and electrical conductivity in the water pipe detected by the control device 4. , Or a signal indicating an abnormality such as an output current or an electrode is input, and the operating state of the scale component precipitation suppression device of the present invention or an abnormality in the water circulation system is taken out via the personal computer 8 and displayed. And so on.
[0019]
A host computer 9 is connected to the control device 4 via a mobile phone connected in parallel with the personal computer 8, a PHS telephone communication network 10, or a general telephone line 11.
[0020]
Next, the details of the control device 4 will be described with reference to FIG. A portion surrounded by a broken line in FIG. 41 is an AC wave oscillation circuit in the control device 4 and outputs an AC rectangular wave. 42 is a power supply unit that supplies power to the oscillation circuit 41, 43 is an output voltage setting unit that sets an applied voltage (V) to the electrodes 2 and 3 of the AC rectangular wave output from the AC wave oscillation circuit 41, and 44 is an AC This is an output frequency setting unit for setting the frequency of the AC rectangular wave of the wave oscillation circuit 41.
[0021]
When an AC rectangular wave is applied to the electrodes 2 and 3 with the frequency and voltage set from the AC wave oscillation circuit 41, a current flows between the electrodes 2 and 3, and this current is detected by the output current display unit 45. 46 is a VA value calculation unit that integrates the output voltage (V) set in the output voltage setting unit 43 and the current (A) detected in the output current display unit 45 at an appropriate sampling interval, and 47 is this VA value. The calculation unit 46 detects a VA value calculated at an appropriate sampling period, and checks whether the detected VA value is within a predetermined range, at the sampling period. Here, it is outside the range of 1 VA to 4 VA. It is a VA value abnormality detection circuit set so as to detect it as an abnormality when
[0022]
Next, the control content of the scale component precipitation suppressing device of the present invention by the above-described components will be described. In the present invention, the voltage (V) in the output voltage setting unit 43 is controlled by the relationship between the current (A) detected in the output current display unit 45 and the VA value set in the VA value calculation unit 46, and the VA value is Control is performed to be within the range of 1 VA to 4 VA set in the VA value calculation unit 46. For example, in the output voltage setting unit 43, when a controllable voltage (V) range is set to about 0 to 30 V and an output voltage of 10 V is applied, when a current of 100 mA is detected in the output current unit 45, The VA value at this time is 1 VA.
[0023]
In the water conduit 1, an alternating current rectangular wave is applied to the electrodes 2 and 3 and the scale in the water passage system is dispersed. For example, when water begins to concentrate, the current value increases, but the load voltage decreases. For example, when the current value rises to 200 mA from the above initial value state, even if the voltage drops to 5 V, the VA value remains 1 VA, so the environment where water treatment can be performed is maintained. However, if the voltage drops to 4V for some reason at this time, the VA value becomes 0.8 VA. Therefore, the VA value abnormality detection unit 47 determines that the environment has a reduced water treatment efficiency and detects it as an abnormal VA value. To do. In the above description, the range of the controllable voltage (V) is set to about 0 to 30 V, but may be set to 30 V or less, or may be set to a voltage higher than 30 V.
[0024]
Since the scale component precipitation suppression device of the present invention adds the configuration described below to the above configuration to form a control device in the deposition suppression device of the present invention, this point will be described below.
[0025]
In FIG. 2, reference numeral 48 denotes an output current abnormality detection unit. When the change in the load voltage between the electrodes cannot follow the rapid change in the current value, or when the voltage applied between the electrodes is fixed to a constant voltage, Or, in order to cope with the case where the applied voltage needs to be set within a narrow range, an allowable range of the current flowing between the electrodes is set in advance, and if the current value is outside the allowable range, It is for detecting as.
[0026]
In the present invention, the load voltage between the electrodes 2 and 3 when a constant current is passed between the electrodes 2 and 3 is measured, and the current value passed between the electrodes 2 and 3 corresponding to the measured voltage. May be controlled so as to be within the range of the VA value.
[0027]
Reference numeral 49 denotes an electric conductivity detector. In the detector 49, a signal from the electric conductivity sensor 5 provided in the water pipe 1 is used as a signal from the water temperature sensor 6 provided in the water pipe 1. Is taken into consideration to detect the electrical conductivity of the water pipe 1 at a constant temperature. Reference numeral 50 denotes an electrode diagnostic unit, which is obtained from the electrical conductivity converted into a numerical value at a constant temperature detected by the electrical conductivity detection unit 49 and the current value flowing through the electrodes 2 and 3. The electrical conductivity is compared to diagnose whether there is an abnormality in the electrode, such as adhesion of a passive component to the electrode surface, or wear or wear of the electrode. The diagnosis of the electrodes is performed at an appropriate interval between the suppression operations separately from the operation of suppressing the deposition of the scale component by the electrodes 2 and 3. Specifically, a constant voltage is applied to the electrodes 2 and 3 from the constant voltage circuit unit 51, the current value flowing at that time is converted into electrical conductivity in the electrical conductivity conversion unit 52, and compared as described above. Do it.
[0028]
53 is an automatic valve operation setting unit, set an allowable upper limit value and lower limit value of the electrical conductivity detected in the electrical conductivity detection unit 49, when the detected electrical conductivity has reached the upper limit value, It is detected by the electric conductivity detector 49, and the automatic valve 7 is operated by a signal based on this detection to discharge or replace the circulating water or supply makeup water. In the embodiment, an upper limit value and a lower limit value of electrical conductivity set in advance in the setting unit 53 are provided with a season setting unit 54, and an upper limit value determined in advance in consideration of an average temperature in each season for each season. Each lower limit value is set automatically.
[0029]
In the automatic valve operation setting unit 53, when the electrical conductivity does not reach the upper limit value within a predetermined time and the automatic valve 7 is not activated, the automatic valve 7 is forcibly activated to add circulating water. You can also change the settings.
[0030]
If it is detected that the circulating water is not diluted even if the automatic valve 7 is forcibly activated by detecting that the electric conductivity detected by the electric conductivity detector 49 does not reach the lower limit value, the automatic valve 7 can be set in the automatic valve operation setting unit 53 and the electric conductivity detection unit 49 so as to output that effect.
[0031]
An input / output unit 55 is provided in the control device 4 for connecting the above-described personal computer 8 or the like to the control device 4. Reference numeral 56 denotes a modem connected to the input / output unit 55. The modem 56 automatically connects the control device 4 to the host computer 9 via a cellular phone, a PHS telephone communication network 10, or a general telephone line 11. Accordingly, the host computer 9 can report various types of abnormality, control the setting value, and cancel the abnormality. In addition, since data such as electrical conductivity, water temperature, and current value between electrodes can be stored in the host computer 9, the operation state and operation history of each precipitation suppression device provided in each circulation system. Can be grasped individually, and based on the result, various settings and operation details of the control device 4 can be changed in a more preferable direction.
[0032]
Next, the operation or function of the device of the present invention configured as described above will be described. In the device of the present invention, the electrical conductivity of water is not detected by a change in the current value or load voltage between the water treatment electrodes 2 and 3, but the electrical conductivity sensor 5 is provided in the water pipe 1 as described above. It arrange | positions and it is comprised so that it may detect by measuring continuously the electrical resistance value of circulating water as an electrical conductivity. The reason for this configuration is that, as in the prior art, the detection of electrical conductivity using an electrode for water treatment cannot accurately detect the conductivity when an abnormality occurs in the electrode.
[0033]
In the device of the present invention described above, the correspondence between the measured value and the current value between the electrodes 2 and 3 is monitored in the measurement mode of the electric conductivity, and the passive component is attached to the electrode surface, or the electrode Means are provided for detecting electrode abnormalities such as wear or wear. The detection of the electrode abnormality is performed at appropriate intervals between the suppression of the precipitation of scale components in the circulating water by the electrodes 2 and 3. For example, a current flowing when a constant voltage of 10 KHz and 5 V is applied from the constant voltage circuit 51 between the electrodes is measured, and a current value-electric conduction obtained in advance stored in the conductivity conversion unit 52 from the measured current value The electrical conductivity is obtained from a rate conversion table (the content of the conversion table varies depending on the diameter of the water pipe 1), and the obtained electrical conductivity is compared with the electrical conductivity measured by the electrical conductivity sensor 5. As an example of the comparison, it can be determined as follows.
・ Electrical conductivity obtained from sensor = electric conductivity obtained from electrode plate ... normal. Electrical conductivity obtained from sensor> electric conductivity obtained from electrode plate ... electrode abnormality.
In the apparatus of the present invention, a water temperature sensor 6 is provided in the water flow pipe 1 to measure the temperature of the circulating water, and the electrical conductivity at the measured temperature is converted into the electrical conductivity at a constant water temperature and detected. The structure which provides a means is employ | adopted. This is because the electrical conductivity is related to the solubility of water, but since the solubility of water varies with temperature, the electrical conductivity also varies with temperature. This is because it is necessary to set the upper limit value and the lower limit value of the electrical conductivity to values converted to a constant temperature.
[0035]
Furthermore, in the device of the present invention, the upper limit value and the lower limit value of the electrical conductivity are set in advance, and when the detected electrical conductivity reaches the upper limit value, the automatic valve 7 provided in the circulation system is operated to supply the circulating water. A configuration is adopted in which means is provided for discharging and replacing the circulation system or supplying makeup water. This is because the treatment for dispersing the scale component most efficiently in the water without depositing is performed within the optimum VA value range by the water treatment electrodes 2 and 3, and the electric conductivity within this VA value range. This is because the state of water treatment by the electrodes 2 and 3 is monitored by the sensor 5 so that the automatic valve 7 can be controlled. Incidentally, in the conventional technique in which the electrical conductivity is detected by the electrode for water treatment, it is impossible to control an automatic valve or the like with high accuracy. In the apparatus of the present invention, the electrodes 2 and 3 can be diagnosed as described above. In the device of the present invention, the upper limit value and the lower limit value of the electrical conductivity set in advance can be configured to be automatically set for each season, each corresponding to the season, so as in the conventional device, There is no hassle of having to change the setting each time the season changes.
[0036]
Moreover, when the electrical conductivity does not reach the upper limit within a predetermined time and the automatic valve 7 is not operated, a configuration may be provided in which the automatic valve 7 is forcibly operated and the circulating water is replaced. . If it is detected that the circulating water is not diluted even if the automatic valve 7 is forcibly activated, such as when the electric conductivity does not reach the set lower limit value, it is an abnormality of the automatic valve 7 or makeup water. It is also possible to provide a configuration for detecting that the supply is not performed. This is because when the precipitation suppression device is operated for a long time, it may become abnormal due to various factors, but when the abnormal condition occurs, if the operation is continued in that state, damage to the device will occur. This is because it takes a lot of time and effort to repair, so that when an abnormal condition occurs, it can be detected and notified immediately.
[0037]
Furthermore, the device of the present invention is provided with an input / output unit 55 in the control device 4 so that a personal computer 8 can be connected. By this personal computer 8, output voltage setting, output current setting, output frequency setting, output frequency switching. Allows setting of time, upper and lower limit values of electrical conductivity, seasonal settings, etc., and PC 8 water temperature and electrical conductivity signals, output current abnormality, electrode abnormality, automatic valve operation abnormality Such a configuration is adopted that the operation state of the control device of the present invention and the abnormal state of the water circulation system can be externally displayed via the personal computer 8. In this way, the personal computer 8 can set the output voltage and the like in the control device 4, detect the water temperature, electrical conductivity, etc., and detect the abnormal state. The device according to the present invention has a water pipe in one water circulation system. (It may be provided at several locations within one water circulation system), but is usually provided at several water circulation systems. This is because it would be convenient if each device was connected to the precipitation control device and the output voltage and the like were set individually to detect the water temperature, electrical conductivity, etc., and to detect abnormal conditions. In addition, when an abnormal state occurs in the apparatus, a configuration may be provided in which an alarm sound is directly emitted from the output current abnormality detection unit 48, the VA value abnormality detection unit 47, or the like to notify the outside.
[0038]
In the device of the present invention, in addition to the above configuration, a telephone line modem 56 is provided in the control device 4, and the general telephone line 11, the cellular phone, and the PHS telephone communication network 10 are registered in advance via the modem 56. 9 is automatically connected so that various abnormal states and setting values can be set and changed in the apparatus of the present invention, and data such as electrical conductivity, water temperature, and current value between electrodes can be accumulated. It is possible to adopt the configuration as described above. This is not only the detection of abnormal states and various control operations for each of the plurality of the present invention devices by the personal computer 8, but also the centralized management of the plurality of the present invention devices at one place and remote operation. This is to do it. Furthermore, by accumulating data such as the operation status of the apparatus of the present invention, various detection signals, and setting contents, the operation contents of the scale component precipitation suppression apparatus of the present invention can be analyzed, and the maintenance of the apparatus is maintained. It is also possible to do.
[0039]
The main configuration and function of the electrode-type scale component precipitation suppressing device of the present invention are as described above, but the present invention device is not only for suppressing the precipitation of scale components in circulating water, The structure is employed that keeps the water to be kept clean, that is, activates chloride ions in the circulating water to inhibit the growth and proliferation of bacteria and microorganisms that inhabit the circulating system.
[0040]
Specifically, by changing the frequency of the alternating rectangular wave applied between the electrodes 2 and 3 in the output frequency setting unit 44, the propagation and proliferation of bacteria and microorganisms can be inhibited. That is, by setting the frequency of the AC rectangular wave applied between the electrodes 2 and 3 to a frequency lower than the frequency at which the precipitation of scale components is suppressed, the chloride ions in the circulating water are charged with potential and activated. At this time, it is known that circulating water reacts with orthotolydine, a reagent for detecting hypochlorous acid, but bacteria and bacteria that live in the circulatory system using this charged charged chloride ion. Can inhibit reproduction. By doing so, not only is the inside of the circulation system maintained clean, but also when the water is replaced, there is an effect that the water to be discarded does not adversely affect the surrounding environment.
[0041]
In addition, the output frequency setting unit 44 can set the frequency of the AC rectangular wave applied between the electrodes 2 and 3 according to the purpose, the frequency for suppressing the precipitation of scale components in the circulating water, and the bacteria and microorganisms. It is also possible to repeatedly set a frequency for inhibiting the propagation and growth of the worms every arbitrary time. Here, the frequency of the alternating rectangular wave applied between the electrodes 2 and 3 is set to 0.1 kHz to 10 kHz when suppressing the precipitation of scale components, and the frequency for inhibiting the growth and proliferation of bacteria and microorganisms is as follows: The frequency is set lower than the frequency at which the precipitation of scale components is relatively suppressed. The frequency to be set can be changed as appropriate in relation to the operating efficiency of the apparatus.
[0042]
【Effect of the invention】
The present invention is as described above, and the apparatus according to the present invention is a water treatment that suppresses precipitation of scale components by applying an AC rectangular wave to an electrode disposed in a water pipe, and disperses the deposited scale components. In this case, the control for efficiently performing the treatment is controlled within the range of the predetermined VA value, thereby effectively suppressing the precipitation of the scale component and detecting the electric conductivity of the water for water treatment. Since the electrical conductivity sensor is provided separately from the electrode, there is almost no malfunction due to electrode abnormality, etc., and it is possible to diagnose whether there is an abnormality in the electrode. It is a highly complete device as a suppression device.
[0043]
In addition, since the apparatus of the present invention can inhibit not only the precipitation of scale components but also the growth and growth of bacteria and microorganisms in the circulation system, the effect that the circulating water can be kept clean is obtained.
[0044]
Furthermore, the device of the present invention can be controlled and managed for each device individually by a personal computer, and each device can be collectively managed by a host computer, and this can be remotely controlled and managed using a telephone line or the like. You can also
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing an example of an electrode-type scale component precipitation suppressing device of the present invention.
FIG. 2 is a block diagram showing details of a control device of the apparatus shown in FIG.
FIG. 3 is a diagram showing a relationship between a VA value and a scale component dispersion rate.
FIG. 4 is a diagram showing a relationship between a VA value and a redox potential decrease rate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water pipe 2,3 Electrode 4 Control apparatus 5 Electrical conductivity sensor 6 Water temperature sensor 7 Automatic valve 8 Personal computer 9 Host computer
10 Telephone network
11 General telephone line
41 AC wave oscillation circuit
42 Power supply
43 Output voltage setting section
44 Output frequency setting section
45 Output current display
46 VA value calculator
47 VA value error detection circuit
48 Output current error detector
49 Electrical conductivity detector
50 Electrode diagnosis department
51 Constant voltage circuit
52 Conductivity converter
53 Automatic valve operation setting section
54 Season setting section
55 I / O section
56 Modem

Claims (11)

An electrode-type scale that suppresses precipitation of scale components in circulating water by placing a pair of electrodes facing each other in a water pipe connected to a water circulation system and applying an alternating rectangular wave voltage between these electrodes In the component deposition suppressing device, an electrode is provided, wherein a control device is provided for controlling a product (VA value) of a load voltage between the pair of electrodes and a measured current value in a preset range of 1 VA to 4 VA. Expression scale component precipitation suppression device.   An electrical conductivity sensor is installed in the water pipe to continuously measure the electrical resistance value of the circulating water as the electrical conductivity, and the correspondence between the measured value and the current value between the electrodes is monitored to the electrode surface. 2. The electrode-type scale component deposition suppressing device according to claim 1, wherein the control device comprises means for detecting adhesion of the passive component of the electrode or abnormality of the electrode due to wear or wear of the electrode.   A control device is provided with detection means for measuring a temperature of circulating water by disposing a water temperature sensor in the water pipe and detecting the electrical conductivity at the measured temperature by converting the electrical conductivity at a constant water temperature. 2 is an electrode-type scale component precipitation suppression device.   The upper and lower limits of electrical conductivity are set in advance, and when the detected electrical conductivity reaches the upper limit, the automatic valve provided in the water circulation system is activated and the circulating water is discharged from the circulation system. The electrode-type scale component precipitation suppression device according to claim 2 or 3, wherein the control device is provided with means for supplying or supplying makeup water.   5. The electrode according to claim 4, wherein means for automatically setting the upper limit value and the lower limit value of the electrical conductivity set in advance to respective values determined in consideration of an average temperature of each season and each season is provided in the control device. Expression scale component precipitation suppression device. 5. The control device according to claim 4 , further comprising means for forcibly operating the automatic valve and replacing the circulating water when the electric conductivity does not reach the upper limit value within a predetermined time and the automatic valve is not operated. Electrode type scale component precipitation suppression device.   If it is detected that the circulating water is not diluted even if the automatic valve is forcibly activated due to the fact that the electrical conductivity does not reach the set lower limit value, either the automatic valve is abnormal or makeup water is being supplied. The electrode-type scale component precipitation suppression device according to claim 6, wherein the control device is provided with means for detecting that there is no.   The control device comprises means for changing the frequency of the alternating voltage applied between the electrodes in order to inhibit the growth and proliferation of bacteria and microorganisms that inhabit the circulation system by activating chloride ions in the circulating water. The deposition suppression apparatus of the electrode type scale component in any one of 1-7.   The frequency of the alternating voltage applied between the electrodes can be set for each purpose, and the frequency for suppressing the deposition of scale components in the circulating water and the frequency for inhibiting the growth and growth of bacteria and microorganisms can be set at any time. The electrode-type scale component precipitation suppression device according to any one of claims 1 to 8, wherein the control device comprises means for repeatedly setting each time.   A signal input / output unit is provided in the control unit, and various abnormal signals such as water temperature abnormality, electrical conductivity abnormality, output current abnormality, electrode abnormality, and automatic valve operation abnormality are input to the personal computer connected to the input / output unit. The computer allows the output voltage setting, output current setting, output frequency setting, output frequency switching time setting, electric conductivity upper and lower limit setting, seasonal setting various settings, The electrode-type scale component precipitation suppression device according to any one of claims 1 to 9, wherein an abnormal state can be reported to the outside as required.   A telephone line modem is provided in the control device, and the modem automatically connects to a pre-registered host computer via a general telephone line, a cellular phone, or a PHS telephone communication network, and reports various abnormality reports and setting value changes. 11. The electrode-type scale component deposition suppression device according to claim 1, wherein the device is capable of canceling the abnormality and can accumulate data of electrical conductivity, water temperature, and current value between the electrodes.

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