JP5097339B2 - Electrolyzed water generator - Google Patents

Description

  The present invention relates to an electrolyzed water generating apparatus.

  As one type of electrolyzed water generator, an electrolyzer, a supply pipe for supplying electrolyzed water to the electrolyzer, an outflow pipe for flowing electrolyzed water produced in the electrolyzer, and a high concentration aqueous solution of electrolyte An electrolyte solution storage tank that is stored and connected to the supply pipe line via a connection pipe line, and the high-concentration aqueous solution stored in the electrolyte solution storage tank and raw water that flows through the supply pipe line are mixed. There is an electrolyzed water generating device that includes electrolyzed water preparation means for preparing a dilute aqueous solution of an electrolyte and electrolyzes the dilute aqueous solution prepared by the electrolyzed water preparation means (see Patent Document 1).

  In the electrolyzed water generating device of this type, the electrolysis operation is controlled so that the characteristics of the electrolyzed water to be generated have predetermined characteristics. For example, when the electrolyzed water generating device is a diaphragm electrolysis type electrolyzed water generating device, the electrolyzed water generated in the anode side electrolysis chamber of the diaphragm electrolyzer contains effective chlorine having sterilizing ability. It is acidic water (electrolytically generated acidic water) that is widely used in various fields as sterilizing water. The electrolytically generated acidic water is required to be an electrolytically generated water having a predetermined predetermined sterilizing ability, and the sterilizing ability is caused by the effective chlorine concentration. Operation is controlled so that effective chlorine has a predetermined concentration. In the electrolyzed water generating apparatus proposed in Patent Document 1 described above, the electrolysis current value during electrolysis operation is constant on the premise that a dilute aqueous solution having a constant chloride (electrolyte) concentration is used as the electrolyzed water. Thus, the control device controls so as to generate electrolytically generated acidic water having a predetermined concentration in which the effective chlorine concentration is set.

  By the way, it is known that the electrolysis operation of the electrolyzed water generating device of this type greatly affects the effective chlorine concentration in the electrolyzed acidic water in which the water temperature of the electrolyzed water is generated. The temperature decreases linearly as the water temperature rises, and increases linearly as the water temperature decreases. For this reason, in the electrolyzed water generating apparatus proposed in Patent Document 1 described above, a water temperature detecting means for detecting the water temperature of the raw water for preparing the electrolyzed water is disposed, and the water temperature of the detected raw water is detected. In response to the increase, the current passed between both electrodes is increased so that the effective chlorine concentration in the generated electrolytically generated acidic water is a predetermined concentration or more, and in response to a decrease in the water temperature of the detected raw water, Control is performed to reduce the current flowing between the electrodes within a range where the effective chlorine concentration in the generated electrolytically generated acidic water is a predetermined concentration or more.

  As described above, according to the control of the electrolysis operation in the electrolyzed water generating device, the set concentration range is maintained regardless of the fluctuation of the temperature of the water to be charged (raw water for preparation) and the change of the water temperature throughout the year. Electrolytically generated acidic water containing effective chlorine can be generated, and it contains effective chlorine at a predetermined concentration set by accurately controlling the relationship between the water temperature of the water to be electrolyzed and the current value applied to both electrodes. Electrolytically generated acidic water can be generated.

In addition, unlike the electrolyzed water generating device proposed in Patent Document 1, the electrolytic current during electrolysis operation is adjusted by adjusting the electrolyte concentration in the water to be electrolyzed while keeping the voltage applied between both electrodes constant. in the electrolytic water generation apparatus of the type which controls the value to a constant, the electrolytic current value during electrolysis operation to adjust the current value commensurate with the water temperature of the electrolyzed water, the electrolysis when the water temperature becomes higher It is necessary to adjust to increase the electrolyte concentration in the water and to reduce the electrolyte concentration in the water to be electrolyzed when the water temperature decreases. In the electrolyzed water generating apparatus, the same effect as the electrolyzed water generating apparatus proposed in Patent Document 1 can be achieved by controlling the electrolyte concentration.

  By the way, in the control of the electrolysis operation in both of these electrolyzed water generators, if a failure (short circuit, disconnection, etc.) occurs in the water temperature detection means, it is necessary to stop the electrolysis operation, and the failure of the water temperature detection means Is detected and an error warning is generated, and the electrolysis operation is manually or automatically stopped. When a failure such as a short circuit or disconnection occurs in the water temperature detection means, for example, the control device determines that the water temperature is high due to the short circuit, and determines that the water temperature is low due to the disconnection. To do.

  For this reason, in the former electrolyzed water generating apparatus described above, until the electrolysis operation is stopped, when the short circuit occurs, the control device increases the current passed between both electrodes to increase the electrolysis efficiency. When the electrolysis control is increased and disconnection occurs, the electrolysis control is performed to reduce the electrolysis efficiency by reducing the current flowing between both electrodes. The characteristics of the electrolytically generated acidic water generated by the electrolysis control greatly deviate from the set predetermined characteristics, and it is preferable to stop the electrolysis operation instantaneously. However, when a failure occurs in the water temperature detection means, it is extremely difficult to stop the electrolysis operation instantaneously according to this.

  Further, in the latter electrolyzed water generating device described above, until the electrolysis operation is stopped, when the short circuit occurs, the control device increases the electrolyte concentration in the water to be electrolyzed to increase the electrolysis efficiency. When control is performed and disconnection occurs, electrolysis control is performed to reduce the electrolyte concentration in the water to be electrolyzed to lower the electrolysis efficiency. The characteristics of the electrolytically generated acidic water generated by the electrolysis control greatly deviate from the set predetermined characteristics, and it is preferable to stop the electrolysis operation instantaneously. However, when a failure occurs in the water temperature detection means, it is extremely difficult to stop the electrolysis operation instantaneously according to this.

  Moreover, in the electrolyzed water generating apparatus, in the electrolysis operation in which electrolysis is controlled when a short circuit occurs, the electrolyte concentration of the water to be electrolyzed is extremely higher than the concentration predicted in the electrolysis operation, and the electrolysis current value is abnormal. The electrolysis of water to be electrolyzed becomes extremely intense and the generation of effective chlorine increases. For this reason, generation | occurrence | production of the chlorine gas from an electrolyzed water production | generation apparatus and the electrolysis acid production | generation acid water discharged increases, it has a bad influence on a surrounding metal apparatus, and is not preferable also for an operator. This phenomenon is a period from when a failure occurs in the water temperature detecting means until the electrolysis operation is stopped, and even if it is not a long time, the occurrence of the phenomenon should be prevented.

  Accordingly, an object of the present invention is to address the above-described problem in the former electrolyzed water generating apparatus and the above-described problem in the latter electrolyzed water generating apparatus.

  The present invention relates to an electrolyzed water generating apparatus. An electrolyzed water generating apparatus to which the present invention is applied includes an electrolyzer, a supply pipe that supplies electrolyzed water to the electrolyzer, an outflow pipe that causes the electrolyzed water produced in the electrolyzer to flow out, and an electrolyte An electrolyte solution storage tank that stores a high concentration aqueous solution and is connected to the supply pipe line via a connection pipe line, and the high concentration aqueous solution stored in the electrolyte solution storage tank and the supply pipe line flow. It is an electrolyzed water generating device of a type comprising electrolyzed water preparation means for preparing a dilute aqueous solution of electrolyte by mixing raw water and electrolyzing the dilute aqueous solution prepared by the electrolyzed water preparation means.

Thus, the first electrolyzed water generating apparatus according to the present invention is an electrolyzed water generating apparatus of the above-described type, and includes a control device that controls a current to be supplied to both electrodes of the electrolytic cell, and the electrolyzed water is provided. An electrolyzed water generating apparatus for electrolyzing a dilute aqueous solution having a constant concentration of an electrolyte prepared by a preparing means under control of an electrolysis current, the electrolyzed water generating apparatus being a water temperature detecting means for detecting a water temperature of the electrolyzed water , and includes an electrolytic current value detection means for detecting the electrolysis current value during electrolysis operation, the controller increases or decreases the control current to be supplied to the electrodes on the basis of the level of the water temperature output from said temperature detecting means Therefore, when the water temperature output from the water temperature detection means is a high temperature or low temperature exceeding the range of the normal water temperature, both electrodes are energized. Increase / decrease of current His, is characterized in changing the control corresponding to the temperature of the upper or lower limit of the temperature range commonly used.

Further, the second electrolyzed water generating apparatus according to the present invention is an electrolyzed water generating apparatus of the above-described type, and a control device for controlling the discharge amount of a variable discharge pump that constitutes the electrolyzed water preparation means. An electrolyzed water generating device for electrolyzing the dilute aqueous solution under a constant voltage, the electrolyzed water generating device comprising water temperature detecting means for detecting a water temperature of the electrolyzed water, and electrolysis of the electrolytic cell Electrolytic current value detecting means for detecting an electrolytic current value is provided, and the control device increases or decreases the discharge amount of the high-concentration aqueous solution in the metering pump based on the level of the water temperature output from the water temperature detecting means. by controlling the electrolyzed water generated in such a manner that the characteristics set, wherein, when water temperature output from the temperature detection means from temperature exceeding the range of temperature of conventional, the quantitative The control of the discharge amount of pump is characterized in that to change control corresponding to the temperature of the upper or lower limit of the temperature range commonly used.

In the electrolyzed water generating apparatus according to the present invention, it can be assumed that the abnormally high temperature value or low temperature value of the water temperature output from the water temperature detecting means is caused by a failure of the water temperature detecting means. .

  In the first electrolyzed water generating apparatus according to the present invention, basically, a dilute aqueous solution having a constant concentration of the electrolyte prepared by the electrolyzed water preparation means is used as a predetermined temperature at which the water temperature of the electrolyzed water is set. In the case of the water temperature, the electrolysis operation is performed under the control of a constant electrolysis current value, thereby setting the electrolyzed water by electrolysis at a set electrolysis current value. Electrolytically generated water having a characteristic, for example, electrolytically generated acidic water containing an effective chlorine concentration within a set predetermined concentration range, or electrolytic generated acidic water containing a predetermined effective chlorine concentration within a set concentration range Can be generated.

  Moreover, in the electrolyzed water generating device of the type, when the water temperature of the water to be electrolyzed varies or changes according to the season (such a variation and variation of the water temperature are collectively referred to as a water temperature change). Changes in the electrolysis current due to changes in the water temperature, and when the water temperature moves to the high temperature side, the electrolysis current decreases, and the effective chlorine concentration in the electrolyzed acid water tends to decrease linearly. In addition, when the water temperature shifts to the low temperature side, the electrolysis current increases, and the effective chlorine concentration in the electrolytically generated acidic water tends to increase linearly. However, in the first electrolyzed water generating apparatus according to the present invention, when the water temperature of the electrolyzed water shifts to the high temperature side, the electrolyzed water is generated by increasing the current passed through both electrodes. Maintain the characteristics of electrolyzed water, for example, effective chlorine in the generated electrolyzed acidic water at the same level as the set concentration. The current to be generated is reduced to lower the electrolysis efficiency, and the characteristics of the generated electrolyzed water, for example, the effective chlorine in the generated electrolyzed acidic water are maintained equal to the set concentration.

  By the way, in the first electrolyzed water generating apparatus of the present invention, it is indispensable to employ a water temperature detecting means for detecting the water temperature of the water to be electrolyzed. However, in the water temperature detecting means, a failure such as a short circuit or disconnection is caused. May occur. When such a failure occurs in the water temperature detection means, the water temperature detection means outputs, for example, a detection signal indicating that the water temperature is high when a short-circuit occurs, and low when a disconnection occurs. A detection signal indicating the water temperature is output. More specifically, when a thermistor is used as the water temperature detecting means, the thermistor outputs a signal of 60 ° C. in the case of a short circuit and a signal of −30 ° C. in the case of a disconnection due to its characteristics. .

  Therefore, when a failure occurs in the water temperature detection means, the current flowing to both electrodes is abnormally increased or decreased based on the abnormal water temperature detection signal from the water temperature detection means, and the electrolysis current value of the electrolyzed water is the normal value. An abnormal current value greatly exceeding the range of the electrolytic current value is obtained, and as a result, electrolysis under these electrolytic conditions forms an abnormal electrolytic state. However, in the first electrolyzed water generating apparatus according to the present invention, when the control of the current applied to both electrodes deviates more than the water temperature that is commonly used for electrolyzed water, for example, when exceeding the upper limit, both electrodes The current value to be supplied to the electrode is stopped at the current value corresponding to the upper limit water temperature, and when the current value is lower than the lower limit, for example, the current value supplied to both electrodes is stopped at the current value corresponding to the lower limit water temperature. For this reason, even when a failure occurs in the water temperature detecting means, it is possible to prevent the occurrence of an abnormal electrolysis operation of the electrolyzed water due to an abnormality in the current to be energized.

In the second electrolyzed water generating apparatus according to the present invention, basically, an electrolytic current value during electrolysis operation is adjusted by adjusting the electrolyte concentration in the water to be electrolyzed with the voltage applied between both electrodes being constant. It employs an electrolytic operation for controlling one constant to. Thus, although the electrolysis operation at a constant voltage, to be electrolytic water is adjusted electrolyte concentration, and can be electrolytically at a set predetermined electrolytic current value and the electrolytic current of the same, etc., are set Generate electrolytically generated acidic water containing a predetermined characteristic, for example, an effective chlorine concentration within a set predetermined concentration range, or an electrolytically generated acidic water containing a predetermined effective chlorine concentration within a set concentration range be able to.

  Moreover, in the electrolyzed water generating device of this type, when a change occurs in the water temperature of the electrolyzed water, a change occurs in the electrolysis current due to the change in the water temperature, and the water temperature shifts to the high temperature side. The electrolysis current decreases, and the effective chlorine concentration in the electrolyzed acid water tends to decrease linearly. Also, when the water temperature shifts to the low temperature side, the electrolysis current increases and the electrolyzed acid water is effective. There is a tendency for the chlorine concentration to rise linearly. However, in the second electrolyzed water generating apparatus according to the present invention, when the water temperature of the electrolyzed water shifts to the high temperature side, the electrolyzed water is generated by increasing the electrolyte concentration in the electrolyzed water and increasing the electrolysis efficiency. Characteristics of electrolyzed water, for example, maintain effective chlorine in the generated electrolyzed acidic water at the same level as the set concentration, and when the water temperature of the electrolyzed water moves to the low temperature side, The electrolyte concentration is reduced to lower the electrolysis efficiency, and the characteristics of the electrolyzed water produced, for example, the effective chlorine in the electrolyzed acidic water produced are maintained equal to the set concentration.

  Even in the second electrolyzed water generating apparatus according to the present invention, it is indispensable to employ a water temperature detecting means for detecting the water temperature of the electrolyzed water, but in the water temperature detecting means, a failure such as a short circuit or disconnection is caused. May occur. When such a failure occurs in the water temperature detection means, the water temperature detection means outputs, for example, a detection signal indicating that the water temperature is high if a short circuit occurs, and if a disconnection occurs. A detection signal indicating that the water temperature is low is output. More specifically, when a thermistor is used as the water temperature detecting means, the thermistor outputs a signal of 60 ° C. in the case of a short circuit and a signal of −30 ° C. in the case of a disconnection due to its characteristics. .

  Therefore, when a failure occurs in the water temperature detecting means, if a means for controlling the electrolytic current by adjusting the electrolyte concentration of the electrolyzed water based on the abnormal water temperature detection signal from the water temperature detecting means is taken, The electrolyte concentration becomes an abnormal concentration that greatly exceeds the normal concentration range, and as a result, the electrolytic current of the electrolyzed water becomes an abnormal current value that greatly exceeds the normal current value range. For this reason, electrolysis under these electrolysis conditions forms an abnormal electrolysis state. However, in the electrolyzed water generating apparatus according to the present invention, the electrolyte concentration corresponding to the upper limit water temperature is adjusted when the adjustment of the electrolyte concentration of the electrolyzed water deviates from the commonly used water temperature, for example, when exceeding the upper limit. The concentration adjustment is stopped, and for example, when the concentration is below the lower limit, the adjustment of the electrolyte concentration corresponding to the lower limit water temperature is stopped. For this reason, generation | occurrence | production of the abnormal electrolysis driving | operation of the to-be-electrolyzed water resulting from the abnormal density | concentration of the to-be-electrolyzed water electrolyte concentration can be prevented.

  The present invention relates to an electrolyzed water generating device, and in particular, an electrolyzer, a supply line for supplying electrolyzed water to the electrolyzer, an outflow line for flowing out electrolyzed water generated in the electrolyzer, and a high concentration aqueous solution of an electrolyte. The electrolyte solution storage tank that is stored and connected to the supply pipeline via the connection pipeline, and the high-concentration aqueous solution that is stored in the electrolyte solution storage tank and the raw water flowing through the supply pipeline are mixed to mix the electrolyte. The present invention relates to an electrolyzed water generating device of a type provided with electrolyzed water preparation means for preparing a dilute aqueous solution.

  FIG. 1 schematically shows an electrolyzed water generating device according to an embodiment of the present invention. The electrolyzed water generating apparatus uses dilute saline obtained by diluting sodium chloride as an electrolyte to be electrolyzed, and electrolyzes containing effective chlorine having sterilizing ability by subjecting the electrolyzed water to diaphragm membrane electrolysis. It is intended to produce product acid water.

  The electrolyzed water generating apparatus includes a diaphragm electrolytic cell 10, a supply pipe 21 that supplies water to be electrolyzed to the diaphragm electrolytic tank 10, and an outflow line 22 a that causes the electrolyzed water generated in the diaphragm electrolytic tank 10 to flow out. , 22b, a storage tank 24 storing an aqueous solution (high-concentration saline) containing sodium chloride at a high concentration and connected to the supply pipe line 21 via a connection pipe line 23, and stored in the storage tank 24 A metering pump 25 for preparing a dilute aqueous solution of salt by mixing high-concentration saline and raw water flowing through the supply pipe 21 is provided, and the electrolysis operation is controlled by the controller 31.

  The diaphragm electrolyzer 10 includes a tank body 11, a diaphragm 12 having ion permeability that partitions the inside of the tank body 11 into a pair of compartments, and the compartments are provided in the compartments R1 and R2. It consists of a pair of electrodes 13 and 14 to be formed, branch pipes 21a and 21b of the supply pipe 21 are connected to the upstream side of the electrolysis chambers R1 and R2, and downstream of the electrolysis chambers R1 and R2. The outflow pipes 22a and 22b are connected to the main body. In the diaphragm electrolytic cell 10, during electrolysis operation, electrolyzed water is supplied to the electrolysis chambers R 1 and R 2 through the branch pipes 21 a and 21 b of the supply pipe 21, and the supplied electrolyzed water is supplied to the electrolysis chambers. Electrolysis is performed at R1 and R2. The electrolyzed water generated in the electrolysis chambers R1 and R2 flows out of the system through the outflow pipes 22a and 22b.

  In the diaphragm electrolysis, acidic water (electrolytically generated acidic water) is generated in the anode side electrolysis chamber, and alkaline water (electrolytically generated alkaline water) is generated in the cathode side electrolysis chamber. Among these electrolytically generated waters, the electrolytically generated acidic water contains effective chlorine having sterilizing ability and corresponds to the sterilized water that the present invention intends to generate. Electrolytically generated alkaline water has high detergency due to alkalinity, and can be used as cleaning water in various fields.

  The supply pipe line 21 constituting the electrolyzed water generating apparatus has a base end connected to a water source such as tap water, and tap water or the like should be introduced as raw water for preparing the electrolyzed water. Function. The connection pipe 23 is connected to the storage tank 24 at the base end and connected to the tip of the supply pipe 21 in the middle of the supply pipe 21, and is connected to the storage tank 24 adjusted to a predetermined concentration. The high-concentration saline functions as a stock solution for preparing electrolyzed water so as to be introduced in the middle of the supply pipe 21. A metering pump 25 that discharges a predetermined amount of a stock solution (high-concentration saline) is interposed in the middle of the connecting pipe line 23 that functions in this way. The metering pump 25 is a discharge amount variable metering pump, and the discharge amount is controlled according to the pulse signal given from the control device 31. In the supply pipe line 21, a water amount detection means 32 is interposed upstream of the connection part of the connection pipe line 23, and a water temperature detection means 33 is provided downstream of the connection part of the connection pipe line 23. It is intervened. Reference numeral 34 is an electrolytic current value detecting means for detecting an electrolytic current value flowing between the electrodes 13 and 14, and reference numeral 35 is a DC power source.

In the electrolyzed water generating apparatus, the electrolyzed water is electrolyzed under a constant voltage, and during the electrolysis operation, the control device 31 performs control to adjust the salt concentration of the electrolyzed water to maintain a predetermined electrolysis current value. Thus, the characteristics of the electrolytically generated water generated, in the present invention, control is performed to maintain the effective chlorine concentration having sterilizing ability in the electrolytically generated acidic water at a set concentration. In the electrolyzed water generating device, in addition to the operation control, the electrolyzed water can be sterilized in response to changes in the water temperature, such as changes in the water temperature of the electrolyzed water and changes in the water temperature throughout the year. Operation control is performed to maintain the concentration of effective chlorine at a set concentration.

In the electrolyzed water generating apparatus, during the electrolysis operation, the control device 31 confirms the amount of raw water supplied based on the detection signal from the water amount detecting means 32 and the detection signal from the electrolysis current value detecting means 34. check the electrolysis current flowing between the electrodes 13 and 14 based on, as the electrolytic current value becomes a constant, and controls for adjusting the salt concentration of the electrolytic water. In the control to adjust the salt concentration in the electrolyzed water, when the electrolysis current value is lower than the set current value, the mixing amount of the high-concentration saline solution is determined according to the supply amount of the raw water, and the metering pump The metering pump 25 is controlled so that the discharge amount of 25 corresponds to the mixing amount, and if the electrolysis current value is higher than a predetermined current value, the raw water is supplied. The mixing amount of the high-concentration saline solution is determined according to the amount, and the driving of the metering pump 25 is controlled so that the discharge amount of the metering pump 25 is reduced corresponding to the mixing amount. Thereby, in the said electrolyzed water generating apparatus, the characteristic of the electrolyzed water produced | generated can be hold | maintained to the set predetermined characteristic. In the electrolyzed water generating apparatus, the concentration of effective chlorine having sterilizing ability can be maintained at a predetermined effective chlorine concentration.

  By the way, in the electrolyzed water generating device of this type, when a change occurs in the water temperature of the water to be electrolyzed, a change occurs in the electrolysis current due to the change in the water temperature, and the water temperature shifts to the high temperature side. The electrolysis current decreases, and the effective chlorine concentration in the electrolyzed acid water tends to decrease linearly. Also, when the water temperature shifts to the low temperature side, the electrolysis current increases and the electrolyzed acid water is effective. There is a tendency for the chlorine concentration to rise linearly.

  For this reason, in the electrolyzed water generating apparatus, the controller confirms the water temperature of the electrolyzed water supplied based on the detection signal from the water temperature detecting means 33, and the water temperature of the electrolyzed water is determined. When the temperature is shifted to a higher temperature than the assumed water temperature, the salt concentration in the water to be electrolyzed is increased accordingly to increase the electrolysis efficiency, and the characteristics of the electrolyzed water produced, for example, the electrolysis produced If the effective chlorine in the generated acidic water is maintained at the same level as the set concentration, and the water temperature of the electrolyzed water has shifted to a lower temperature than the water temperature where the water to be electrolyzed is assumed, The salt concentration is reduced to lower the electrolysis efficiency, and the characteristics of the electrolyzed water produced, for example, the effective chlorine in the electrolyzed acidic water produced are maintained equal to the set concentration.

  Therefore, in the electrolyzed water generating apparatus, it is indispensable to use the water temperature detecting means 33 in order to detect the water temperature of the electrolyzed water. However, when the water temperature detecting means 33 is used, a failure ( Short circuit / disconnection) is a new problem. When a failure such as a short circuit or disconnection occurs in the water temperature detection means 33, for example, when a short circuit occurs in the water temperature detection means 33, a detection signal indicating that the water to be electrolyzed is at a high water temperature is output. When a disconnection occurs in the water temperature detection means 33, a detection signal indicating that the water to be electrolyzed is at a low water temperature is output. More specifically, in a thermistor commonly used as a water temperature detecting means, the thermistor outputs a signal of 60 ° C. in the case of a short circuit and a signal of −30 ° C. in the case of a disconnection due to its characteristics. .

  Therefore, when a failure occurs in the water temperature detection means 33, the control device 31 increases the salt concentration of the water to be electrolyzed based on the abnormal high water temperature detection signal from the water temperature detection means 33, thereby increasing the electrolysis current value. Based on the abnormal low water temperature detection signal from the water temperature detecting means 33, the control device 31 reduces the salt concentration of the electrolyzed water and abnormally reduces the electrolysis current value. . In order to cope with this, in the control device 31 in the electrolyzed water generating device, when the water temperature output from the water temperature detecting means 33 is a high temperature or a low temperature exceeding the normal water temperature range, the discharge amount of the metering pump 25 is reduced. The control is changed to control corresponding to the upper limit or lower limit water temperature in the normal water temperature range. Thereby, according to the said electrolyzed water generating apparatus, when the short circuit generate | occur | produces in the water temperature detection means 33, the control apparatus 31 judges that the water temperature of to-be-electrolyzed water shifted to the upper limit temperature in the normal water temperature range. Thus, the salt concentration of the water to be electrolyzed is adjusted to a concentration corresponding to the water temperature, thereby preventing unexpected abnormal electrolysis operation.

  When the electrolysis current value during electrolysis operation is controlled to be constant by adjusting the salt concentration of the electrolyzed water as in the electrolyzed water generating device, the salt concentration in the electrolyzed water is abnormally high However, the amount of chlorine component in the generated electrolyzed acidic water may increase abnormally and dissipate as chlorine gas outside the system of the electrolyzed water generating device. However, in the electrolyzed water generating device, as described above, In addition, since the control of abnormally increasing the salt concentration in the electrolyzed water is prevented, the abnormal increase of the chlorine component can be prevented as described above, and a large amount of chlorine gas can be prevented from being scattered.

  Using the first electrolyzed water generating apparatus according to the present invention, an electrolysis experiment for performing an electrolysis operation intended by the present invention was attempted. In the electrolyzed water generating apparatus shown in FIG. 1, the generated electrolyzed acidic water is required to have a predetermined concentration in the range of effective chlorine concentration of 20 to 60 mg / kg as its characteristics. In order to cope with this, in the electrolyzed water generating apparatus, the discharge amount of the metering pump constituting the electrolyzed water preparation means is controlled so that the electrolysis current value during the electrolysis operation is constant, and the salt in the electrolyzed water is controlled. The density is adjusted. As a result, when the water temperature of the electrolyzed water is constant at the assumed water temperature, the effective chlorine concentration in the electrolytically generated acidic water can be maintained at the predetermined concentration set during the electrolysis operation. However, when the water temperature of the electrolyzed water is significantly different from the assumed water temperature, the electroconductivity of the electrolyzed water changes greatly due to the change in the water temperature, and the electrolysis current value changes greatly. The effective chlorine concentration in water also changes greatly.

  In this electrolysis experiment, in order to cope with this, the water temperature is confirmed based on the water temperature detection signal output from the water temperature detecting means, and the set electrolysis current value is automatically calculated by the calculation formula shown in FIG. Refer to the graph), and take measures to control the amount of high-concentration saline discharged from the metering pump according to the calculated electrolysis current value so that the effective chlorine concentration during the electrolysis operation is maintained substantially constant. Yes. In the control of the electrolysis operation, a failure (short circuit / disconnection) may occur in the water temperature detection means, and the electrolysis water generator instantaneously performs the electrolysis operation when a failure (short circuit / disconnection) occurs in the water temperature detection means. Therefore, a measure is taken to prevent the occurrence of an abnormal state of the electrolysis operation during a considerable time until the electrolysis operation is stopped.

  When a failure such as a short circuit or disconnection occurs in the water temperature detection means, for example, when a short circuit occurs in the water temperature detection means, a detection signal indicating that the water to be electrolyzed is at a high water temperature is output. When disconnection occurs in the detection means, a detection signal indicating that the electrolyzed water has a low water temperature is output. More specifically, in a thermistor commonly used as a water temperature detecting means, the thermistor outputs a signal of 60 ° C. in the case of a short circuit and a signal of −30 ° C. in the case of a disconnection due to its characteristics. . Therefore, when a failure occurs in the water temperature detecting means, the control device abnormally increases the electrolysis current value by increasing the salt concentration of the water to be electrolyzed based on the abnormal high water temperature detection signal from the water temperature detecting means. Further, based on the abnormal low water temperature detection signal from the water temperature detecting means, the control device reduces the salt concentration of the water to be electrolyzed to abnormally reduce the electrolysis current value.

  In the control device in the electrolyzed water generating apparatus, in order to cope with this, when the water temperature output from the water temperature detecting means is a high temperature or a low temperature exceeding the normal water temperature range (for example, 5 to 30 ° C.), a metering pump The control of the discharge amount is changed to the control corresponding to the upper limit (for example, 30 ° C.) or the lower limit of the water temperature (for example, 5 ° C.) in the normal water temperature range. In the graph of FIG. 2, the control along the solid line graph is performed, and the control along the broken line graph when the water temperature exceeds 30 ° C. and the control along the broken line graph when the water temperature falls below 5 ° C. are regulated. .

  For this reason, in the electrolyzed water generating apparatus, it is possible to prevent the occurrence of abnormal electrolysis operation due to the failure of the water temperature detecting means, and in particular, the abnormal electrolysis operation in the electrolyzed water generating apparatus of the type can bring the system out of the system. The problem of chlorine gas scattering can be solved.

It is a schematic block diagram which shows the electrolyzed water generating apparatus which concerns on one Embodiment of this invention. It is a graph which shows the relationship between the water temperature of the to-be-electrolyzed water and electrolysis current value in the electrolysis operation control employ | adopted with the electrolyzed water generating apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Separator membrane electrolytic cell, 11 ... Tank main body, 12 ... Diaphragm, 13, 14 ... Electrode, 21 ... Supply line, 21a, 21b ... Branch line, 22a, 22b ... Outflow line, 23 ... Connection line, DESCRIPTION OF SYMBOLS 24 ... Storage tank, 25 ... Metering pump, 31 ... Control apparatus, 32 ... Water quantity detection means, 33 ... Water temperature detection means, 34 ... Electrolytic current value detection means, 35 ... DC power supply, R1, R2 ... Electrolytic chamber.

Claims (3)

An electrolytic tank, a supply pipe for supplying electrolyzed water to the electrolytic tank, an outflow pipe for flowing out electrolyzed water generated in the electrolytic tank, and a connecting pipe for storing a high-concentration aqueous solution of electrolyte in the supply pipe An electrolyte solution storage tank connected through a channel, and a high-concentration aqueous solution stored in the electrolyte solution storage tank and a raw water flowing through the supply pipe are mixed to prepare a dilute aqueous solution of the electrolyte. An electrolyzed water generating device comprising electrolyzed water preparation means, and electrolyzing a dilute aqueous solution having a constant concentration of electrolyte prepared by the electrolyzed water preparation means under control of electrolysis current
The electrolyzed water generating device includes a control device that controls a current passed through both electrodes of the electrolytic cell, a water temperature detecting means that detects a water temperature of the electrolyzed water, and an electrolysis current that detects an electrolysis current value during electrolysis operation. A value detection means,
The controller is configured to increase / decrease the current applied to both electrodes based on the level of the water temperature output from the water temperature detecting means, so that the generated electrolytically generated water has a set characteristic, When the water temperature output from the water temperature detection means is high or low, exceeding the normal water temperature range, increase / decrease control of the current applied to both electrodes is controlled to correspond to the upper or lower water temperature in the normal water temperature range. An electrolyzed water generator characterized by changing. An electrolytic tank, a supply pipe for supplying electrolyzed water to the electrolytic tank, an outflow pipe for flowing out electrolyzed water generated in the electrolytic tank, and a connecting pipe for storing a high-concentration aqueous solution of electrolyte in the supply pipe An electrolyte solution storage tank connected through a channel, and a high-concentration aqueous solution stored in the electrolyte solution storage tank and a raw water flowing through the supply pipe are mixed to prepare a dilute aqueous solution of the electrolyte. An electrolyzed water generating device comprising electrolyzed water preparation means, and electrolyzing the diluted aqueous solution prepared by the electrolyzed water preparation means under a constant voltage,
The electrolyzed water generating apparatus includes a control device that controls a discharge amount of a variable discharge pump that constitutes the electrolyzed water preparation means, a water temperature detection means that detects a water temperature of the electrolyzed water, and an electrolysis tank Electrolytic current value detection means for detecting the electrolytic current value during electrolysis is provided,
The control device sets the generated electrolyzed water by controlling the electrolysis current by increasing or decreasing the discharge amount of the high concentration aqueous solution in the metering pump based on the level of the water temperature output from the water temperature detecting means. is set to be in it are characteristic, wherein when the water temperature output from the temperature detecting means is hot or cold beyond the scope of the water temperature of the customary, the control of the discharge amount of the metering pump, the upper limit in the temperature range of conventional Alternatively, the electrolyzed water generator is changed to control corresponding to the lower limit water temperature. In the electrolyzed water generating apparatus according to claim 1 or 2,
An abnormally high temperature value or low temperature value of the water temperature output from the water temperature detecting means is caused by a failure of the water temperature detecting means.

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