JP2005279561A - Water purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water purifier constituted so as to efficiently separate and discharge both of a water-compatible hydrophilic substance and a hydrophobic substance, having high regeneration efficiency, having a water purifying capacity as a result and good in heat efficiency at the time of regeneration operation. <P>SOLUTION: The water purifier is equipped with a water inlet for introducing tap water, a water outlet for discharging purified water, an adsorbent container, which has the tap water inlet and the purified water outlet and houses an adsorbent therein, and a heating means for heating the adsorbeent container and constituted so as not only to purify tap water but also to be regenerated by heating. This water purifier is also equipped with a means for measuring the temperature in the adsorbent container and valves provided on the inlet and outlet sides of the adsorbent container to hermetically close the adsorbent container and the adsorbent container is hermetically closed and opened by the valves before boiling during heating regeneration and heating is continued even after the valves are opened and closed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water purifier having an adsorbent that can be regenerated by heating.

  Conventionally, for example, a method is known in which an adsorbent that adsorbs organic matter is heated in a non-water-permeable state, the organic matter is desorbed, and further, the valve operation or heating conditions are changed after completion of heating regeneration to drain the water that has been desorbed. (For example, refer to Patent Document 1 and Patent Document 2).

  However, in this method, since water was drained by operating the valve after the heating was completed, a large amount of water remained during regeneration. When the same substance adsorbed on the adsorbent surface is desorbed into the liquid phase and desorbed into the gas phase, the diffusion rate is significantly slow in the liquid phase. Therefore, in order to increase the diffusion rate of the desorbed substance, it is better to use less water. In the state where a large amount of water remains, the desorption / discharge efficiency of the hydrophobic substance is lowered and regeneration is insufficient or regenerated. Tended to take a long time.

  Also disclosed is a method in which water remaining in the adsorbent is sucked and forcibly drained, and then heated to desorb and regenerate organic substances (see, for example, Patent Document 3). As another method, a method of heating after draining water remaining in the adsorbent by centrifugal force when rotating the adsorbent is disclosed (for example, see Patent Document 4).

  However, in these methods, since water is drained before heating, there is a problem that the hydrophilic substance is poorly detached. In addition, some hydrophilic polymers contained in tap water gradually become familiar with water because the hydrophobic groups that exist inside appear on the surface by contact with the air after the water has been drained even if it is hydrophilic. It may cause denaturation that changes its form to a bad substance. Such a high-molecular organic substance with a hydrophobic surface does not easily desorb even when heated and regenerated. For such adsorbents that should be heated in the presence of water, heat in the presence of water. It is important to play. Furthermore, since water is drained before heating, many air layers are formed, acting as a heat insulating material, the heat transfer from the heater to the inside of the adsorbent decreases, the heat dissipation ratio to the outside increases, and the heat efficiency decreases. There were drawbacks such as.

As described above, in the prior art, hydrophilic substances that are well-suited to water are desorbed and discharged without causing denaturation, and hydrophobic substances are also regenerated at a high diffusion rate. It was impossible to do.
JP-A-1-511189 JP-A-1-262984 JP-A-9-1130 JP-A-6-182330

  The present invention has been made to solve the above problems, and the object of the present invention is to efficiently desorb / discharge both hydrophilic and hydrophobic substances that are well-suited to water, resulting in high regeneration efficiency. In particular, it is to provide a water purifier having high water purification performance and high thermal efficiency during regeneration operation.

  In order to achieve the above object, an invention according to claim 1 is provided with a water inlet for introducing tap water, a water outlet for discharging purified water, and an inlet and outlet for the tap water, and containing an adsorbent therein. A water purifier comprising the adsorbent container and a heating means for heating the adsorbent container, capable of purifying tap water and regenerating by heating, the adsorbent container temperature measuring means and the adsorbent container Provided with a valve capable of sealing the adsorbent container on the inlet side and the outlet side, and is sealed and opened by the valve before boiling during heating regeneration, and heating is continued even after the valve is opened and closed. .

  According to the present invention, after desorbing a hydrophilic substance that is well-suited to water in water, the water is discharged by opening and closing the valve before boiling, so that the hydrophilic substance is externally denatured without being thermally denatured. Further, by continuing heating after the water is discharged, the hydrophobic substance can be desorbed and discharged at a high diffusion rate, and as a result, a high regeneration efficiency can be realized.

  According to the second aspect of the present invention, the sealing timing of the adsorbent container is determined based on the measured value obtained by the temperature measuring means during heating regeneration, and the opening timing is determined based on the time after the sealing is started. It is characterized by that.

  According to the present invention, since control is performed based on the temperature measurement location, the desorption of the hydrophilic substance in the adsorbent container is facilitated by a safe and simple mechanism without being affected by the seasonal and daily fluctuations in the tap water temperature. Waste water can be drained and regenerated by heating.

  The invention according to claim 3 is characterized in that the sealing timing and the opening timing of the adsorbent container are determined based on the measured value obtained by the temperature measuring means during heating regeneration.

  According to the present invention, drainage can be controlled more accurately without being affected by changes in thermal efficiency due to long-term use of a water purifier.

  The invention according to claim 4 has a timer, and the start of heating regeneration is determined by the timer.

  According to the present invention, it is possible to perform the heat regeneration operation reliably and periodically, such as once every week or once a week, and in a time zone desired by the user.

  Further, the invention according to claim 5 is provided with a water flow amount detecting means, wherein the start of heating regeneration is determined by the water flow amount from the previous regeneration estimated from the water flow amount detecting means.

  According to the present invention, it is possible to perform reproduction at a more accurate timing regardless of the frequency of use.

  The invention according to claim 6 is characterized in that the sealing and opening operations during the heating regeneration are performed a plurality of times.

  According to the present invention, the effect of reducing the concentration of the desorbed substance in the liquid and further promoting desorption can be obtained. As a result, the regeneration efficiency can be improved and the amount of residual water can be further reduced. It becomes possible to improve the thermal efficiency.

  The invention according to claim 7 includes a drainage channel for draining from the outlet side of the adsorbent container, and switches the channel to the water outlet and the drainage channel on the outlet side of the adsorbent container. A three-way valve is provided, and water from the adsorbent container can be drained into the drainage channel by the three-way valve.

  According to the present invention, since the water being heated and regenerated from the outlet side of the adsorbent container is drained to the drainage channel, high temperature water is not drained from the water outlet, so that a highly safe water purifier can be used. Provision is possible.

  The invention according to claim 8 is characterized in that, during the heating regeneration, the outlet side valve of the adsorbent container is closed and the inlet side valve is opened and closed.

  According to the present invention, by setting the discharge direction of water and steam during heat regeneration to the upstream side of the adsorbent, it is possible to regenerate the higher concentration adsorbed material without diffusing downstream. Thus, the regeneration rate of the adsorbent can be improved.

  The invention according to claim 9 is a three-way valve that switches between a drainage channel for draining from the adsorbent container inlet side, and a channel to the inlet and the drainage channel on the adsorbent container inlet side. And during the heating regeneration, the outlet side valve of the adsorbent container is closed, the inlet side valve is opened and closed, and the three-way valve is switched to the drainage flow path side.

  According to the present invention, the discharge direction of water and steam during heating regeneration is set to the upstream side of the adsorbent, and the discharged water and steam are drained from the drainage channel, so that high-temperature water and steam are drained. It is possible to provide a highly safe water purifier that is drained to the flow path.

  The invention according to claim 10 is characterized in that the sealing timing and the opening timing of the adsorbent container during heating regeneration are determined based on the measured values at a plurality of times of the temperature measuring means during heating regeneration.

  According to the present invention, a more accurate current temperature can be estimated from a plurality of temperature data in the past, and it is affected by fluctuations in the value due to thermal convection of steam or water in the adsorbent container during heating regeneration, or condensation. Therefore, more accurate valve opening / closing control is possible.

According to the present invention, a hydrophilic substance that is familiar to water and a hydrophobic substance that are familiar to water can be obtained by desorbing the hydrophilic substance that is familiar to water as much as possible into the water and then draining the water before boiling by opening and closing the valve. Any of the substances can be efficiently desorbed and discharged to provide a water purifier with high regeneration efficiency and high water purification performance, and the regeneration operation can be performed efficiently.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a configuration diagram of a water purifier according to the present invention. In FIG. 1, 1 is a water purifier, 2 is an activated carbon container that stores activated carbon as an adsorbent, 3 is a check valve that prevents water from flowing back to the water purifier, but 4 is a power supply or A control unit composed of a microcomputer or the like, 5 is a water inlet through which tap water flows, 6 is a water outlet through which activated water is regenerated and after the regeneration, 7 is a water outlet through which purified water is spouted, 8 Is an open / close valve for sealing or opening the inside of the activated carbon during regeneration of the activated carbon, 9 is a temperature switching valve for switching the waste water discharged during the regeneration of the activated carbon according to temperature, 11 is a switch for inputting start / stop of water discharge, and 12 is a temperature switching It is a drainage channel from the valve 9. Reference numeral 21 denotes an inflow portion into the activated carbon container 2, 22 is an outflow portion, 23 is activated carbon, 24 is a heater as a heating means for heating the activated carbon and water containing the activated carbon, and 25 is a temperature in the activated carbon container 2. It is a temperature sensor for measuring.

  The operation of the water purifier 1 will be described with reference to FIG. When power is supplied, the water purifier sets the regeneration timing and starts the regeneration timer. For example, the regeneration timing is set to start heating regeneration every day, for example, 5 hours after the power is turned on. The regeneration timer is started, and the regeneration is performed when the regeneration timer exceeds the set value. To do. Thus, by determining the start of regeneration by the timer, it is possible to perform the heat regeneration operation reliably and regularly at a time zone desired by the user, such as every day or once a week. The set value can be input by the user. Next, it enters a standby state waiting for an input of the user water discharge switch 11, and when the switch 11 is pressed, it is determined whether or not the regenerating operation is being performed. Return to wait. If the regeneration operation is not in progress, the control unit 4 opens the on-off valve 8, and tap water passes through the activated carbon container 2 and the on-off valve 8 from the water inlet 5, and clean purified water is discharged from the water outlet 7. The temperature operating valve 9 drains high temperature water during heating regeneration and adjusts the operating temperature so that high temperature water supplied to the water purifier is drained. In this embodiment, the temperature operating valve is 40 ° C. or higher. It is configured to connect to the drainage side at a temperature of.

  Next, the determination operation of the activated carbon regeneration timing will be described using the flowchart of FIG. The water purifier is in a standby state until the water discharge switch 11 is turned on as shown in FIG. 2, but periodically performs the interruption operation of FIG. 3 by a timer. In the interrupt operation, it is determined whether or not the regeneration timer value exceeds the set value, and if it exceeds, a regeneration flag is set. Next, it is determined whether or not the reproduction timer has exceeded 24 hours. If it has exceeded, the reproduction timer is reset. In this embodiment, since the reproduction is started every day at a predetermined time, the reset is made in 24 hours. However, if this is set to 168 hours, the reproduction can be made once a week at the predetermined time. Next, the state of the regeneration flag is determined. If the regeneration flag is set and the water discharge state is not established, the regeneration subroutine is started and the regeneration operation is started. If the regeneration flag is not set, or if the regeneration flag is set and the water is being discharged, the process directly returns to the main routine.

  The reproduction subroutine will be described. FIG. 4 shows the sequence of the reproduction subroutine. First, the on-off valve 8 is opened, energization of the heater 24 is started, and the regeneration flag is reset. When the temperature in the activated carbon container reaches 40 ° C., a temperature operation valve 9 as a three-way valve on the outlet side opens to the drain side. Thus, by providing a three-way valve on the outlet side and discharging hot water or steam during heating regeneration to the drainage side, the safety of the heating regeneration operation can be enhanced. When the temperature sensor reaches T0, the on-off valve closing subroutine is performed, and the on-off valve 8 is closed for ts0 seconds and then opened for tk0 seconds. The on-off valve is closed, the activated carbon container 2 is sealed, the internal pressure is increased by the generated steam, and then the internal water and steam are released at once by opening. As a result, the adsorbed substances desorbed and eluted from the activated carbon surface into the liquid phase are discharged together with water. At this time, the remaining water in the activated carbon container 2 is drained to both the inlet side and the outlet side of the activated carbon container. Next, when the temperature in the activated carbon container further rises and the temperature sensor value reaches T1, the on-off valve closing subroutine is performed, the on-off valve 8 is closed for a time ts1, and the time tk1 is opened. Release the desorbed material. Thereafter, the temperature further rises, and when the temperature reaches Tf, the heating is stopped and the regeneration operation is finished. With regard to the drainage operation by opening and closing the valve during heating regeneration, it may be possible to drain as much residual water as possible at a temperature as high as possible at one time. The effect of reducing and further promoting desorption can be obtained. Moreover, it becomes possible to reduce the amount of residual water more by draining several times, and the effect of improving subsequent thermal efficiency is also acquired. Therefore, it is more preferable to perform the draining operation twice or more. In addition, when the temperature rises too early, it is possible to suppress the temperature rise by reducing the power of the heater near the draining operation. Thus, the number of times of drainage is appropriately selected in consideration of the heating power, the size of the container, the amount of water in the container, the regeneration time, and the like. Moreover, although it is the temperature actuated valve 9 as a three-way valve provided on the outlet side, by using a metal or the like whose shape changes at a predetermined temperature, the flow path is automatically switched depending on the temperature. It can be set as the structure which does not require control. In this embodiment, a check valve is used as a valve on the adsorbent container inlet side. However, an open / close valve that can be arbitrarily opened and closed may be used.

  In the present embodiment, the timing for sealing the adsorbent container is determined by the temperature, and the timing for opening is determined by the time from the sealing. The temperature of tap water varies depending on the season and day, but once the water temperature is determined, the rate of temperature rise, the amount of water vapor evaporated, and the rate of pressure rise are determined. As in this embodiment, the sealing timing is determined based on the temperature in the adsorbent container, and the opening timing is determined based on the time from the start of sealing. It is possible to drain the remaining waste water.

  When the adsorbent container is heated, since there is a large amount of residual water in the adsorbent container, the desorption / elution of the hydrophilic substance proceeds. Substances contained in tap water and adsorbed on adsorbents vary widely, and the degree of hydrophilicity varies. Substances that can be desorbed by heating in water include, for example, bound chlorine such as monochloramine and dichloramine. And phenols, lower fatty acids, humic substances, and the like. Some of the macromolecules are originally hydrophilic, but when they come out of water, they come into contact with the air, and the hydrophobic groups that exist inside gradually come out on the surface. It seems to cause a change of denaturation. Thus, it is considered that the organic polymer having a hydrophobic surface is not easily detached even when heated and regenerated. In this way, substances that should be heated in the presence of water are sufficiently desorbed in the presence of water, and the desorbed substance is discharged together with water, and then easily desorbed into the gas phase in a boiling state. The adsorbent can be efficiently regenerated by desorbing and discharging to the outside at a high diffusion rate. Regarding the temperature inside the adsorbent container that opens and closes the valve for draining, the higher the desorption temperature, the faster the desorption rate. However, when the boiling temperature of water reaches 100 ° C., the evaporation of water becomes vigorous and the gas phase portion increases, so that the modification of the hydrophilic polymer proceeds rapidly. The desorbed substance is actually considered to be in an equilibrium between adsorption and desorption on the surface of the adsorbent, and contact with the gas phase increases at a high temperature, which may gradually denature and re-adsorb. In addition, the rate of increase of the gas phase pressure becomes abrupt due to boiling. Since the temperature rise characteristics differ slightly for each adsorbent container, it is necessary to drain water near the boiling point in order to drain water safely and reliably without reaching too high pressure for any individual. The valve should be opened / closed and drained at temperatures below 100 ° C. In addition, factors that affect the desorption rate include temperature, the difference between the concentration of the adsorbent surface of the target substance and the concentration in water, but if desorption of the adsorbed substance proceeds by heating, the concentration of the desorbed substance in water It becomes higher and the rate of desorption is expected to decrease. Therefore, the overall regeneration speed can be improved by frequently performing the draining operation as described above and reducing the concentration of the desorbed substance.

  After desorbing the hydrophilic substance that is well-suited to water as much as possible in this way, water is discharged by opening and closing the valve before boiling, thereby discharging the hydrophilic substance to the outside without thermal denaturation, In addition, the hydrophobic substance can be desorbed and discharged at a high diffusion rate when the amount of water decreases and the gas phase increases, and the above regeneration operation can be performed safely and efficiently. Further, regarding the adsorbent, various materials can be selected depending on the substance to be removed. For example, various materials such as activated carbon, activated alumina, silica gel, titanium dioxide, zeolite, bone charcoal, and ceramic particles can be used. Activated carbon is particularly suitable because it has a large specific surface area and a large adsorption capacity and is thermally stable. Yes. By using these alone or in combination, various substances in tap water can be removed.

  Here, the temperatures T0 and T1, the closing times ts0 and ts1, and the opening times tk0 and tk1 will be described. As described above, both T0 and T1 need to be lower than 100 ° C., but it is desirable that the temperature be as high as possible in order to promote desorption. Regarding the set values of the temperatures T0, T1, the closing times ts0, ts1, and the opening times tk0, tk1, the power consumption of the heater, the amount of residual water in the adsorbent container, the shape of the adsorbent container inlet, outlet, and the adsorbent container Depending on the pressure resistance of the heater, for example, when the power consumption of the heater is 20 w, activated carbon is used as the adsorbent, the amount of initial residual water in the activated carbon container is about 400 cc, and the sectional area of the inlet and outlet is about 10 cm 2 or less, It is preferable that T0 is 92 ° C., T1 is 95 ° C., ts0 and ts1 are about 1 minute, and tk0 and tk1 are also about 1 minute. In addition, in the initial heating of the activated carbon container 2, since it is desired to raise the temperature quickly, the initial heater output can be set as large as about 100 w, and the output can be gradually lowered as the water draining temperature is approached. Such conditions are appropriately selected so that water can be drained most efficiently by conducting experiments in accordance with the adsorbent container, heater power consumption, and the like. Further, the end temperature Tf of the heat regeneration can be set to, for example, about 120 ° C. to 160 ° C. as a temperature at which the heat regeneration is sufficiently performed. This temperature varies depending on the measurement site depending on the position in the adsorbent container, the heater position, and the like, but can be appropriately selected according to the configuration, the number of heating regenerations, and the like.

Next, the second embodiment of the present invention will be described in detail.
The configuration of the second embodiment is shown in FIG. In the first embodiment, residual water in the adsorbent container was discharged to both the inlet side and the outlet side during regeneration. In the present embodiment, an example will be described in which only the inlet side opening / closing valve is opened and closed during heating regeneration, the outlet side is always closed, drained to the inlet side, and the start timing of heating regeneration is determined by the amount of water. The configuration is almost the same as in the first embodiment, but 10 is a flow rate sensor. When the water purifier is used, the value of the flow rate sensor 10 is always accumulated by the control unit 4 and the amount of water flow since the end of the previous regeneration. Seeking and holding. Reference numeral 30 denotes a three-way valve, and the water flow direction can be arbitrarily switched from the activated carbon container to the water discharge port 7 direction and to the water discharge port 6 direction. By enabling the three-way valve 30 connected to the drainage channel to be opened arbitrarily, not only can the water being heated and regenerated be drained, but also when it is used for the first time after the regeneration, a predetermined amount is drained, so Water that may contain the desorbed substance can be drained, and hygiene can be further improved. 31 is an on-off valve, 32 is a three-way valve, 33 is a water outlet for discharging water during heating and regeneration of the activated carbon container. During normal water purification, the three-way valve 32 supplies tap water from the tap water inlet 5 to the activated carbon container 2. When draining water during heating and regeneration, it operates to drain residual water in the activated carbon container to the drain port 33. Reference numeral 13 denotes a drainage channel from the three-way valve 32.

  Next, the determination operation of the active adsorbent regeneration timing will be described using the flowchart of FIG. Similar to the first embodiment, the determination is periodically made by the interrupt operation. In the interruption operation, the amount of water flow after the end of the previous regeneration is read, and if the amount of water flow exceeds a predetermined amount and the water discharge switch is OFF, the regeneration operation jumps to the regeneration subroutine and starts the regeneration operation. When the amount of water passing does not reach the predetermined amount or when the water discharge switch is ON, the process directly returns to the main routine. Although the amount of adsorbed material on the adsorbent surface depends on the quality of tap water, it basically depends on the water flow rate. Therefore, by determining the heating regeneration timing based on the water flow rate after the end of the previous regeneration in this way, it is possible to perform regeneration at a more accurate timing regardless of the frequency of use.

  The heating regeneration operation will be described with reference to FIG. In the first embodiment, the opening and closing valves on both the adsorbent container inlet side and the outlet side are opened at the start of heating regeneration. However, in this embodiment, the outlet side is closed and the inlet side opening and closing valve is opened. At the same time, the three-way valve on the entrance side is opened to the drain port 33 side. As for the opening / closing operation of the on-off valve for draining, the on-off valve 8 on both the inlet side and the outlet side is opened in the first embodiment, whereas the on-off valve 22 on the outlet side in this embodiment is It is always closed and only the opening / closing valve 31 on the inlet side is opened / closed. Therefore, in the on-off valve closing subroutine, only the inlet-side on-off valve 31 is opened / closed.

  Next, the reason why the outlet side opening / closing valve 22 is always closed when the valve is opened and closed and only the inlet side opening / closing valve 31 is opened / closed will be described. Activated carbon 23 adsorbs and removes organic substances in tap water, but adsorbs from the upstream side of the activated carbon, so the adsorption concentration is high on the inlet side, and the concentration of the adsorbed substance is low on the outlet side or not adsorbed at all in the initial stage. There is no tendency. When activated carbon adsorbed more on the upstream side is heated, the adsorbed material is expected to diffuse to the downstream side of the activated carbon, which is considered to be desorbed and diffused by heat. When the adsorbed material upstream of the activated carbon diffuses to the downstream side by heating, the concentration of adsorbed material diffuses by diffusing to a wider space, so the concentration decreases, and it becomes difficult to desorb even when heated. Since it diffuses while repeating adsorption and desorption, it takes a long time to discharge out of the activated carbon container. Therefore, by setting the water and steam discharge direction during heating regeneration to the upstream side, it becomes possible to prevent diffusion of the adsorbed material to the entire adsorbent and to improve the regeneration rate of the adsorbent. Become. Further, if the same level of reproduction level as before is achieved, the reproduction time can be shortened.

Next, a third embodiment of the present invention will be described in detail.
In the first and second embodiments, the opening / closing timing of the opening / closing valve during the heat regeneration is determined by first determining the closing timing based on the temperature, closing after a predetermined closing time, and then opening for a predetermined time. . In the present embodiment, an example in which both the closing timing and the opening timing are determined by temperature will be described. The configuration is the same as that of the second embodiment, and the configuration shown in FIG. To the outlet 33.

  The adsorbent regeneration timing judgment operation is periodically determined by the amount of water flow from the previous regeneration by an interrupt operation, but of course it should be performed periodically using a timer as in the first embodiment. May be. The reproduction operation will be described with reference to the flowchart of the reproduction subroutine of FIG. As in the second embodiment, the outlet side is closed, the inlet-side on-off valve is opened, and the inlet-side three-way valve is opened to the drain port 33 side. Heating regeneration is started, and when the temperature reaches a predetermined value T0, the open temperature Tk0 is defined, the flow goes to the on-off valve closing subroutine, and the drainage operation is performed by opening and closing the valve. At this time, the more accurate estimated current temperature Tx in the adsorbent container is periodically calculated by an interruption operation, and this estimation method will be described later. The on-off valve closing subroutine will be described with reference to FIG. First, the on-off valve 8 is closed, and when the estimated current temperature Tx in the adsorbent container exceeds the first opening temperature Tk0, the on-off valve 8 is opened and the process returns to the regeneration subroutine. Returning to the regeneration subroutine, it is determined whether or not the estimated current temperature Tx exceeds the second closing temperature T1, and if it exceeds, the process jumps again to the on-off valve closing subroutine. After the opening and closing of the second time, the heating is stopped when the temperature in the adsorbent container exceeds the heating end temperature, and the heating regeneration is ended.

  The temperature rise characteristic when heating the adsorbent container is affected by the thermal efficiency of the input power, which is actually used for increasing the temperature in the adsorbent container, together with the water temperature. This thermal efficiency gradually decreases due to the influence of inorganic substances adhering to the vicinity of the heater when the water purifier is used for a long period of time. Moreover, it changes not only with the period of use but also with the quality of tap water such as the amount of inorganic substances. Therefore, when controlling the temperature characteristics from the heat regeneration, the evaporation amount of water vapor, and the like, it is desirable to control by the temperature in the adsorbent container. In this embodiment, the timing of sealing and opening of the activated carbon container is both controlled by the temperature inside the activated carbon container, and more accurately without receiving the temperature of the water purifier, the quality of the tap water, the water temperature, etc. The drainage can be controlled. Further, in this embodiment, the drain valve is controlled to open and close depending on the temperature in the adsorbent container, but when combined with the scheduled closing time of the first embodiment, the adsorption is performed when the temperature rise is extremely fast or slow. More detailed control such as releasing the sealing of the material or issuing a warning is possible, which is more preferable.

  During heating regeneration, it seems that water is evaporated and condensed in the adsorbent container, and a flow due to heat, steam, etc. is generated, and the value fluctuates greatly depending on the state near the temperature sensor. The operating temperature of the on-off valve is a very large factor that affects the degree of regeneration, but if the temperature data is used as it is, there is a possibility that the error will become very large. By estimating a more accurate current temperature from a plurality of past temperature data, it is possible to prevent the valve opening / closing timing from being too late or conversely too early. As for the estimation method of the current temperature Tx, it is possible to estimate the temperature rise line by reading the temperature sensor values of about the past 10 points, and to estimate the current temperature Tx based on this temperature rise line. At this time, about 10 seconds is sufficient as the sampling speed of the temperature data. These values may be used directly, or digital filtering is performed by linearly adding the past data to obtain new temperature data. From this, Tx may be obtained. Furthermore, a configuration may be adopted in which a low-pass filter is configured by hardware to eliminate temperature data fluctuation.

It is a figure which shows the structure in 1st embodiment of this invention. It is a figure which shows the main routine in 1st embodiment of this invention. It is a figure which shows the interruption operation | movement of reproduction | regeneration timing determination in 1st embodiment of this invention. It is a figure which shows reproduction | regeneration operation | movement in 1st embodiment of this invention. It is a figure which shows the opening / closing operation | movement of a valve in 1st embodiment of this invention. It is a figure which shows the structure in 2nd embodiment of this invention. It is a figure which shows the interruption operation | movement of reproduction | regeneration timing determination in 2nd embodiment of this invention. It is a figure which shows reproduction | regeneration operation | movement in 2nd embodiment of this invention. It is a figure which shows reproduction | regeneration operation | movement in 3rd embodiment of this invention. It is a figure which shows the opening / closing operation | movement of the valve in 3rd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Water purifier 2 ... Activated carbon container 3 ... Check valve 4 ... Control part 5 ... Water inlet 6 ... Drain port 7 ... Water discharge port 8 ... On-off valve 9 ... Temperature switching valve 10 ... Flow sensor 11 ... Switch 12 ... Drain flow path DESCRIPTION OF SYMBOLS 13 ... Drain flow path 21 ... Inflow part 22 ... Outflow part 23 ... Activated carbon 24 ... Heater 25 ... Temperature sensor 30 ... Three-way valve 31 ... On-off valve 32 ... Three-way valve 33 ... Drain outlet

Claims (10)

A water inlet for introducing tap water, a water outlet for discharging purified water, an adsorbent container having an inlet and an outlet for the tap water and containing an adsorbent therein, and heating means for heating the adsorbent container A water purifier that purifies tap water and can be regenerated by heating, and is capable of sealing the adsorbent container at the adsorbent container temperature measuring means and the inlet and outlet sides of the adsorbent container The water purifier is sealed and opened by the valve before boiling during heating regeneration, and the heating is continued even after the valve is opened and closed. 2. The sealing timing of the adsorbent container is determined based on a measured value obtained by the temperature measuring means during heating regeneration, and the opening timing is determined based on the time after the sealing is started. Water purifier. The water purifier according to claim 1, wherein a sealing timing and an opening timing of the adsorbent container are determined based on a measurement value obtained by the temperature measuring means during heating regeneration. The water purifier according to claim 1, further comprising a timer, wherein the start of heating regeneration is determined by the timer. The water purifier according to any one of claims 1 to 4, further comprising a water flow detection means, wherein the start of heating regeneration is determined based on the water flow from a previous regeneration estimated from the water flow detection means. The water purifier according to any one of claims 1 to 5, wherein the sealing and opening operations during the heating regeneration are performed a plurality of times. A drainage channel for draining from the outlet side of the adsorbent container, and a three-way valve for switching between the channel to the water outlet and the drainage channel on the outlet side of the adsorbent container, the three-way valve The water purifier according to any one of claims 1 to 6, wherein water from the adsorbent container can be drained into a drainage channel. 8. The water purifier according to claim 1, wherein the outlet side valve of the adsorbent container is closed and the inlet side valve is opened and closed during the heat regeneration. A drainage channel for draining from the inlet side of the adsorbent container, and a three-way valve for switching between the channel to the inlet and the drainage channel on the inlet side of the adsorbent container, and during the heat regeneration, the adsorption The water purifier according to claim 8, wherein the outlet side valve of the material container is closed, the inlet side valve is opened and closed, and the three-way valve is switched to the drainage channel side. The sealing timing and opening timing of the adsorbent container during heating regeneration are determined by a plurality of measured values obtained at different times obtained by the temperature measuring means during heating regeneration. Claim 2 or Claim 3 water purifier.

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