JP3112135B2 - Activated carbon regeneration type water purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifier that regenerates activated carbon by heating the activated carbon as needed to maintain the purification ability for a long period of time.

[0002]

2. Description of the Related Art When tap water is brought into contact with activated carbon, a odorous odor component (residual chlorine) dissolved in the tap water, an organic chlorine compound (such as trihalomethane) harmful to the human body, and a moldy odorant (such as 2-methylisoborneol) Water purifiers that remove diosmin) are known.

[0003] Japanese Patent Application Laid-Open No. Hei 1-262884 discloses an adsorbent material.
A heater for heating (activated carbon) through an aqueous layer and this heating
Equipped with a water temperature control device that interrupts power supply to the
Heater and water temperature control device
Operates intermittently according to the timer's instruction, causing the adsorbent to boil
While being sterilized, the substance adsorbed on the adsorbent
It is described that it is desorbed by action and regenerates the adsorbent
ing.

[0004]

The object of the invention is to be Solved However, this Kiyoshi
For water heaters, during or after heating regeneration
Soon after the activated carbon is hot,
When water is applied, the activated carbon is quenched and activated by the heat shock.
The life of charcoal will be shortened and the water purifier will be used
Thailand despite the fact that heating and regeneration of activated carbon is unnecessary
Is regularly regenerated by heating
It is said that the life of activated carbon is rather shortened
There's a problem.

[0005] It is an object of the present invention to provide a timer for non-use at midnight or the like .
Heating Ru can play the activated carbon at a fixed time every day in the timer
In a regenerative water purifier, when activated carbon is in a high temperature state, the user
Can warn the user to avoid accidentally passing water
It is to provide a regenerative water purifier .

[0006] In another aspect, it is an object of the present invention, Kiyoshi
Activated carbon is reheated with a timer only when the water bottle is fully used.
It is desirable to provide a heating regeneration-type water purifier to live.

[0007]

SUMMARY OF THE INVENTION The present invention provides a water inlet and a clean water inlet.
An activated carbon container having a water outlet and containing activated carbon,
Heating means for heating the activated carbon container for regeneration,
Automatically activates the heating means at the set activated carbon regeneration time.
A regenerative water purifier with control means that starts dynamically
Display means controlled by the control means; and
Temperature detecting means connected to the means for detecting the temperature of the activated carbon container
And a control step, wherein the control means controls the heating means while the heating means is being driven.
The display means indicates that the use of the water purifier is prohibited,
After the end of charcoal regeneration, the temperature of the activated carbon container drops below the specified temperature
After the temperature detection means detects that the
The use permission is displayed on the column.

[0008] With this configuration, during heating and regeneration,
Is displayed to the user, so use incorrectly.
Contained harmful components desorbed from activated carbon
Water is not consumed by the user, and during heat regeneration
Use prohibited sign, and wait for activated carbon to cool down
Use permission is displayed, so when activated carbon is hot
In the unlikely event that the user passes water and the activated carbon is rapidly cooled,
It can prevent the heat shock of charcoal,
The service life can be extended.

Preferably, a temperature for judging permission of use is set.
The degree is about 40 ° C. If this temperature is set, activated carbon
Not only prevents heat shock, but also
The initial water temperature after heat regeneration does not exceed 40 ° C, and there is a danger of burns.
Can be prevented.

[0010]

[0011]

Preferably, a flow rate detecting means for detecting a flow rate
Is provided, and even when the activated carbon regeneration time is reached, the regeneration of the activated carbon can be postponed if the accumulated water flow rate of the water purifier from the previous regeneration has not reached the predetermined value. This not only saves energy but also extends the life of the activated carbon.

[0013] More preferably, the water purifier is provided with an electromagnetic valve for controlling the flow of water to the activated carbon container, and the electromagnetic valve is closed during energization of the heater or during cooling of the activated carbon after the end of regeneration, thereby forcing the water purifier. Prohibit the use of water purifiers.

[0014] Other features of the present invention will become apparent as the following description of the embodiments proceeds.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the water purifier of the present invention will be described with reference to the accompanying drawings. First, an example of use of the water purifier of the present invention will be described with reference to FIG. 1. The water purifier 10 can be used, for example, mounted on a kitchen counter 14 having a sink 12. In this case, a faucet adapter 20 having a built-in switching valve mechanism is attached to the spout 18 of an existing optional faucet (in the illustrated example, a single-lever type hot-water mixing faucet) 16, and the adapter 20 is supplied with clean water. The hose 22 and the water discharge hose 24 can be connected to the water purifier 10. When the handle 26 of the adapter 20 is turned to a predetermined position, water from the faucet 16 is supplied to the water supply hose 2.
The water which is sent to the water purifier 10 by the water purifier 2 and purified by the water purifier is sent from the purified water discharge hose 24 to the adapter 20 and discharged from the outlet 28 thereof. The purified water from which residual chlorine, harmful substances and odorous substances have been removed can be used as drinking water or for cooking. When the handle 26 is turned to another position, the untreated clean water (or hot water mixture) from the faucet 16 is discharged from the outlet 28 of the adapter 20 without passing through the water purifier, and the vegetables and dishes are washed. It can be used for applications such as. In the illustrated use example, hot water from a water heater (not shown) is supplied to a single lever type hot / water mixer tap 16 via a hot water supply pipe 16A, and a water pipe (also not shown).
Water is supplied from a water supply pipe 16B connected to the water supply pipe.

Referring to FIGS. 2 to 5, the water purifier 10 has a plastic housing 30 and a cap 32 snap-fitted to the housing 30. A bottom plate 36 is fixed to the downwardly extending, for example, six legs 34 integrally formed in the housing 30 by screws 38.
The load of the water purifier 10 is supported by the rubber feet 40.

Briefly, in the illustrated embodiment,
The water purifier 10 includes a filtration stage 4 for removing particulate components such as red rust and microorganisms floating in tap water by a filtration action.
2 and an adsorption stage 44 for removing harmful or undesired substances such as residual chlorine, trihalomethane and odorous substances dissolved in tap water by the adsorption action of activated carbon fibers. It is heated at any time by a heater, sterilized by boiling, and regenerated. The filtration stage 42 is for reducing the load of the particulate component on the activated carbon in the adsorption stage 44, and is not essential for achieving the object of the present invention, and can be omitted.

More specifically, the filtration stage 42 includes a plurality of screws 4
6 has an inverted cup-shaped filter case 50 fixed in a liquid-tight manner to a horizontal wall 48 of the housing 30, in which a conventional hollow fiber membrane filter module 52 is positioned by a cap 54. I have. A radial distribution passage 56 is secured between the housing horizontal wall 48 and the cap 54 and communicates with a downwardly extending inlet tube 58 formed integrally with the housing horizontal wall 48. A hose joint 60 to which the clean water supply hose 22 is connected is fixed to the inlet pipe 58, and clean water coming from the clean water supply hose 22 flows into the distribution passage 56. Inlet pipe 58
Is provided with a conventional check valve 62 to prevent water from flowing back from the hollow fiber membrane filter module 52 to the water supply hose 22. Radial distribution passage 5
The water flowing into the filter case 6 passes through the space between the star-shaped projections 64 formed on the outer periphery of the cap 54 and passes through the filter case 50.
It flows into the annular distribution passage 66 between the inner circumference and the outer circumference of the hollow fiber membrane filter module 52, enters the module 52 through the opening 68 of the hollow fiber membrane filter module 52,
It is filtered by a hollow fiber membrane filter. The filtered tap water flows out of an outlet 70 formed in the cap 54. The hollow fiber membrane filter module 52 preferably has a membrane area of about 2 m ² so that it can be used without replacement for about 7 years under normal water quality conditions. Other types of filters may be used in place of the hollow fiber membrane filter module 52.

As can be clearly seen from FIGS. 2 and 5, the horizontal wall 48 of the housing 30 is provided with a gutter-shaped passage forming member 7.
2 is fixed in a liquid-tight manner and cooperates with the horizontal wall 48 to form a water supply passage 74. A drain plug 76 is screwed into the passage forming member 72, and the passage 74 can be drained by removing the plug 76 when the water purifier 10 is conveyed. The water passage 74 is the housing 3
The water is connected to a water supply riser 78 integrally formed with the water supply line 0, and the water filtered by the filtration stage 42 is sent to the subsequent adsorption stage 44 via the riser 78. 2 and 4, the water supply riser 78 is offset on one side with respect to the vertical center plane of the water purifier 10 and on the other side is a purified water discharge riser which is also integrally formed with the housing 30. 80 are arranged. The water purification discharge riser 80 is for sending purified water purified by the adsorption action of the adsorption stage 44 to the water purification discharge hose 24 as described later, and a hose joint 82 is connected to the riser 80. Is provided with a purified water discharge hose 24.

[0020] Referring to FIGS. 6 and 7, the adsorption stage 44
Has an activated carbon container 84 in the form of an activated carbon cartridge filled with activated carbon fibers. This activated carbon cartridge 84
Consists of a metal can 86 made of stainless steel plate. The metal can 86 comprises a bottomed cylindrical body 88 formed by deep drawing a stainless steel plate and an annular lid 90 made of a stainless steel plate, both of which are liquid-tightly wound along a peripheral edge 92. In order to improve the corrosion resistance of the metal can 86, a body 88 and a lid 90 are provided.
Teflon (Dupont polytetrafluoroethylene)
Ethylene (registered trademark) is coated. Lid 90
Are formed with a plurality of arcuate water inlet openings 94 by punching, so that water sent from the filtration stage 42 through the riser 78 flows into the cartridge 84. A porous cylinder 96 made of stainless steel is arranged at the center of the cartridge 84. Around the cylinder 96, activated carbon fibers 98 are molded using a binder. Instead of the binder molding, the non-woven fabric of the activated carbon fibers 98 may be wound around and appropriately restrained. Further, granular activated carbon or spherical activated carbon may be used instead of activated carbon fibers. An annular distribution passage 100 communicating with the water inlet 94 is formed between the activated carbon fiber layer 98 and the body 88, and the water flowing into the cartridge 84 from the water inlet 94 faces the porous cylinder 96. Through the activated carbon fiber layer 98 radially inward. When passing through the activated carbon fiber layer 98, chlorine, trihalomethane and odorous substances dissolved in water are adsorbed by the activated carbon fiber and removed.
The purified water purified by the activated carbon fiber 98 is a porous cylinder 9
6 and sent to the outlet 102 of the cartridge 84. In order to prevent a short flow of the flow between the annular distribution passage 100 and the perforated cylinder 96, an annular V-groove type embossed portion 104 is provided on the body 88 and the lid 90 of the metal can 86 after the activated carbon fiber filling. It is preferable to press-mold and make these embossed portions 104 bite into the upper and lower end surfaces of the activated carbon fiber layer.

As shown in FIGS. 2 and 8, the activated carbon cartridge 84 is supported on a horizontal wall 106 of the housing 30 through a washer 108 and is closed by a manifold assembly 110. The manifold assembly 110 is divided into an upper member 112 and a lower member 114, which are fixed to each other in a liquid-tight manner. The lower member 114 is fitted to the upper ends of the risers 78 and 80 in a liquid-tight manner and is supported by them. For example, the upper assembly 112 and the lower assembly 114 are fastened together to the horizontal wall 106 of the housing 30 using seven screws 116 (FIG. 4), so that the manifold assembly 110 is fixed to the housing 30.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 4. Referring to FIGS. 8 and 4, an elongated member 118 is formed on the upper member 112 of the manifold assembly 110. And the lower member 114 to form a water supply passage 120. As can be clearly seen from FIG.
20 communicates on one hand with the riser 78 and on the other hand with an inlet port 122 formed in the lower member 114. The inlet port 122 opens into a space 124 formed between the lower member 114 and the lid 90 of the cartridge 84. Therefore, the clean water filtered by the hollow fiber membrane filter module 52 of the filtration stage 42 is supplied to the passage 74, the riser 78, the passage 120, and the port 1.
22, space 124 and metal can 86 flow into annular distribution passage 100 via water inlet 94.

As shown in FIGS. 2 and 4, the upper member 112 of the manifold assembly 110 has another bulge 126 formed thereon. The bulging portion 126 incorporates a temperature-sensitive switching valve 128, so that the bulging portion 126 also serves as a housing for the temperature-sensitive switching valve 128. The bulging portion 126 also cooperates with the lower member 114 of the manifold assembly 110 to form the purified water discharge passage 1.
The clean water discharge passage 130 communicates with the riser 80.

The temperature switching valve 128 has a temperature sensing element 132 as shown in FIG. The temperature sensing element 132 is of a conventional type, and includes a main body 133 containing a heat-expandable wax (not shown), two valve heads 134 and 136, for example, three sliding guide portions 138, and a spindle 140. The spindle 140 is moved to the main body 1 as the ambient temperature rises.
33 to gradually protrude. This temperature sensing element 132 is fitted into the stepped bore of the bulging portion 126 via a return spring 142 acting on a spring receiver as shown in FIG. It is in contact with the cap 144. Therefore, the main body 1
2 is urged rightward in FIG. 2 by a return spring 142 at a low temperature, and as the spindle 140 projects from the main body 133 as the temperature rises, the assembly of the valve head 33 and the two valve heads 134 and 136 Is displaced leftward in FIG. Instead of the temperature-sensitive switching valve 128 using the heat-expandable wax, a temperature-sensitive switching valve using a shape memory alloy may be used.

The upper member 112 of the manifold assembly 110 has an inlet port 146 aligned with the outlet 102 of the activated carbon cartridge 84 so that the temperature sensing element 132 comes into contact with the fluid flowing out of the activated carbon cartridge 84. I have. When the fluid temperature is 50 ° C. or less, the temperature-sensitive switching valve 128 is connected to the first valve head 1 as shown in FIG.
34 closes the valve seat 148 and the second valve head 1
When the fluid temperature exceeds 50 ° C., the valve seat 148 can be opened and the valve seat 150 can be closed when the fluid temperature exceeds 50 ° C. As can be clearly seen from FIG.
8 has a hot steam discharge pipe 152 formed at a position offset laterally from the spindle 140, and the hot steam discharge pipe 152 is provided with a valve seat 148.
(FIG. 2). As shown in FIG. 4, one end of a drain hose 154 can be connected to the hot steam discharge pipe 152. This drain hose 154 passes through the opening 156 in the horizontal wall of the housing 30 and riser 80
And the other end can extend to the sink 12 as shown in FIG.

Referring again to FIG. 7, an electric heater 158 is arranged at the bottom of the can body 88 of the activated carbon cartridge 84, and when the heater is energized, the activated carbon cartridge 84 is heated from the bottom. ing. As the heater 158, a mica heater in which a nichrome wire is sandwiched between mica foils or a sheathed heater can be used. In order to improve the heat transfer from the heater 158 to the can body 88, it is preferable to sandwich an aluminum plate 160 having good heat conductivity between the heater 158 and the bottom of the can body 88. Heater 158 and aluminum heat transfer plate 16
0 is fastened to the can body 88 together with the aluminum heat sink 166 by bolts 162 and nuts 164 welded to the can body 88.

As can be clearly understood from FIG. 7, the central portion 168 of the can body 88 has a raised bottom, and a thermistor 170 for detecting the temperature thereof is brought into contact with the central raised bottom 168 in a heat transfer relationship. The thermistor 170 is supported by a thermistor holder 174 supported by a heat sink 166 via a coil spring 172,
8 is in elastic contact. Aluminum heat sink 166
In addition, the thermal fuse 176 is held in a heat transfer relationship by a clip.

Referring again to FIG. 2, a circuit board 178 is screwed to the back of the cap 32 of the water purifier 10, and a control circuit 180 is fixed to the circuit board. To protect the control circuit 180 from the heat of the heater 158,
A heat shield plate 182 is attached to the cap 32. The control circuit 180 is supplied with AC power from a power cord 184. As shown in FIG.
A display panel 186 is provided.

As shown in FIG. 10, the thermistor 170
Is input to the control circuit 180 via the lead wire 188, and the control circuit 180 can be connected to the liquid crystal display panel 190 of the operation / display panel 186 and the switches 192 and 194. In the illustrated embodiment, the control circuit 180
Comprises a programmed microprocessor 196,
This microprocessor 196 is a solid state processor.
The power supply to the heater 158 is controlled via a relay (SSR) 198. The AC output of the power supply circuit 200 is supplied to the electric heater 158 via the SSR 198 and the temperature fuse 176.

The microprocessor 196 is programmed to automatically energize the heater 158 every day when a predetermined time set in advance (preferably, a predetermined time at midnight) arrives. As shown in the flowchart of FIG. 11, this time can be incremented by, for example, one hour by pressing the reproduction time setting switch 192. The updated playback time is displayed on the liquid crystal display panel 190, for example, "20 hours after playback". The microprocessor 196 is also programmed so that the heater 158 is energized when the user presses the manual regeneration switch 194. After the power supply to the heater 158 is started, the microprocessor 196 monitors the temperature of the center raised bottom 168 of the cartridge 84 by monitoring the output of the thermistor 170, and according to this temperature, the SSR 198 and the liquid crystal display panel 190 will be described later. To control.

Next, the operation of the water purifier 10 will be described.
When water is turned to the water purifier 10 side and the faucet 16 is opened, the tap water is filtered by the hollow fiber membrane module 52 of the filtration stage 42 and then sent to the adsorption stage 44 to be adsorbed by the activated carbon fibers 98 as described above. The purified water that has been purified and collected in the porous cylinder 96 flows out of the outlet 102 of the activated carbon cartridge 84. As described above, the temperature-sensitive switching valve 128 is connected to the outlet 10.
When the temperature of the fluid flowing out of the outlet 2 is 50 ° C. or less, the outlet 10
2 is connected to the purified water discharge passage 130, the purified water collected in the porous cylinder 96 flows from the purified water discharge passage 130 through the riser 80 to the purified water discharge hose 24.
And discharged from the outlet 28 of the adapter 20 for drinking.

The regeneration of the activated carbon is automatically performed every day when a predetermined time comes, and is performed each time the user presses the manual regeneration switch 194. As shown in the flowchart of FIG. 12, when the predetermined time comes or the manual regeneration switch 194 is pressed, the microprocessor 196 excites the SSR 198 and starts energizing the heater 158. At the same time, the LCD panel 190 displays “Playing”.
Or, a use prohibition display such as "Under preparation" is displayed to prevent the user from using the water purifier by mistake.

When the heater 158 is energized, the bottom of the activated carbon cartridge 84 is heated, and the water remaining in the activated carbon cartridge 84 becomes hot water, and then begins to boil. Since the check valve 62 is provided at the inlet of the hollow fiber membrane filter module 52, the activated carbon cartridge 84
The hot water and steam generated therein rise from the outlet 102 of the activated carbon cartridge 84 toward the temperature-sensitive switching valve 128 without flowing back toward the hollow fiber membrane filter module 52, and come into contact with the temperature-sensitive element 132. . Temperature sensing element 132
Is heated to 50 ° C. or higher, the valve heads 134 and 136 move to the left in FIG.
0 is closed, and the cartridge outlet 102 and the inlet port 146 are connected to the hot steam discharge pipe 152, so that hot water and steam generated in the activated carbon cartridge 84 are discharged to the sink 12 via the drain hose 154.

As the water remaining in the activated carbon cartridge 84 boils, the activated carbon fiber 98 is sterilized by boiling, and chlorine adsorbed on the activated carbon fiber and trihalomethane having a boiling point lower than that of water are mixed with hot water. It is easily desorbed by the action of steam, and the activated carbon fibers are regenerated. Odorous substances such as 2-methylisoborneol and diosmin, whose boiling points are higher than the boiling point of water, are not easily desorbed by water vapor. Therefore, as the activated carbon fiber 98, it is preferable to use an activated carbon fiber having a central pore diameter of about 2.7 nm, which has an excellent adsorption capacity for odorous substances. When about 70 g of such activated carbon fibers are filled, a high degree of purification can be performed without replacing the activated carbon fiber cartridge 84 for a long period of about 7 years under normal water quality conditions.

After the power supply to the heater 158 is started, the microprocessor 196 monitors the temperature of the cartridge 84 by checking the output of the thermistor 170. As shown in the flowchart of FIG. When the temperature exceeds 120 ° C., the power supply to the heater 158 is terminated. As the accumulated water in the cartridge 84 evaporates, the level of the accumulated water drops. However, since the central bottom 168 of the cartridge 84 is raised, the central raised bottom 168 is first exposed from the accumulated water with evaporation and lowering of the water level. , The temperature rises faster than other parts. Therefore, even when the temperature of the central raised bottom 168 detected by the thermistor 170 reaches 120 ° C., a small amount of retained water remains at the bottom of the cartridge 84, and the temperature of the raised bottom 168 becomes 120 ° C. By terminating the power supply to the heater when this occurs, overheating of the activated carbon fiber can be prevented, and burning and thermal deterioration of the activated carbon fiber can be prevented.

When the energization of the heater 158 is completed, the cartridge 84 is cooled by heat radiation. When the ambient temperature of the temperature-sensitive switching valve 128 becomes 50 ° C. or lower, the temperature-sensitive switching valve 128 automatically connects the outlet 102 of the cartridge 84 to the purified water discharge passage 130 and prepares for use. The microprocessor 196 checks the output of the thermistor 170 even after the energization of the heater 158 is completed. When the cartridge 84 is further radiated and cooled, and the output of the thermistor 170 detects that the temperature of the cartridge bottom 168 has dropped to 40 ° C., the microprocessor 196 causes the liquid crystal display panel 190 to display “ "Usable" or "READY" is displayed to inform the user that the water purifier has returned to a usable state.

As described above, during the regeneration, the user is notified that the use is prohibited, so that the user does not accidentally drink water containing harmful components desorbed from the activated carbon fibers. Further, since the use permission display is made after the activated carbon fibers are sufficiently cooled, heat shock to the activated carbon fibers can be prevented, and the life of the activated carbon cartridge 84 can be extended.

FIGS. 13 and 14 show a second embodiment of the water purifier. The difference from the first embodiment is that the accumulated water flow rate is obtained by using the timer function of the microprocessor 196 and the flow meter 202. Is not the predetermined value, the reproduction is to be postponed even at the reproduction time. The flow meter 202 is of a known type that generates a pulse by rotation of the impeller, and can be provided, for example, near the check valve 62. Referring to the flowchart of FIG. 14, when the regeneration time comes, it is determined by the timer function whether or not, for example, 48 hours have elapsed since the previous regeneration, and the accumulated water flow amount of the latest one day detected by the flow meter 202 is, for example, 15 hours. Determine if it exceeds liters. If the condition is satisfied, the accumulated water flow value and the timer are reset, and the regeneration is started. If 48 hours have passed since the previous regeneration and the accumulated water flow amount of the latest day is 15 liters or less, the accumulated water flow value is reset and the regeneration is postponed unless the manual regeneration switch is pressed. In this embodiment, when the usage time of the water purifier is short, the frequency of regeneration is reduced, so that the life of the activated carbon fiber can be extended. A water pressure detecting means such as a pressure switch is arranged in place of the flow meter 202, and it is assumed that the water purifier is used while the water pressure is detected, and the accumulated water flow is calculated by integrating the time when the water pressure is detected. May be calculated.

FIGS. 15 and 16 show a third embodiment of the water purifier. The difference from the first embodiment is that, instead of displaying the use prohibition during regeneration of the activated carbon, the solenoid valve 204 is used forcibly. First, it is intended to shut off the flow of water to the cartridge. The solenoid valve 204 can be provided, for example, at the riser 78 or the check valve 62. Referring to the flowchart of FIG. 16, when the energization of the heater is started, the electromagnetic valve 204 is closed, and the flow of water to the cartridge is forcibly shut off. When the temperature of the cartridge becomes 40 ° C. or less after the end of the regeneration, the solenoid valve is opened.

Although a specific embodiment of the present invention has been described above, the present invention is not limited to this, and various design changes can be made. For example, in the illustrated embodiment, the control circuit 180 includes the microprocessor 1
Although 96 is used, the control circuit may be configured as a hard connection circuit using a timer device or a thermostat that performs the same function. Further, the hollow fiber membrane filter module 52 can be omitted.

[0041]

As described above, according to the present invention, the water supply
An activated carbon container having a mouth and a clean water outlet and containing activated carbon,
Heating means for heating the activated carbon container to regenerate the activated carbon
And the driving of the heating means at a preset activated carbon regeneration time.
Heat regeneration water purifier with control means to start automatically
Display means controlled by the control means;
Temperature detection that detects the temperature of the activated carbon container connected to the control means
Means, and the control means controls the display while the heating means is being driven.
Display means to prohibit the use of the water purifier,
After the end of regeneration, the temperature of the activated carbon
Is displayed on the display means after the temperature detection means detects that
Permission is displayed.
The user is shown a use prohibition sign, and the user accidentally passes water.
Use water containing harmful components desorbed from activated carbon
Are not to be drunk by the person and are prohibited during heat regeneration
The display shows that the activated carbon has cooled down
The user is allowed to use the activated carbon when the temperature is high.
Activated carbon produced by rapid cooling of activated carbon
Heat shock can be prevented, and the life of activated carbon can be extended.

When the determination temperature is about 40 ° C., the activity
Not only to prevent the heat shock of charcoal.
The initial water temperature after heating and regeneration does not exceed 40 ° C,
Danger can be eliminated .

Furthermore, if the accumulated water flow is monitored and the regeneration is performed only when the regeneration is really necessary, the energy can be saved.
Thereby extending the life of Rika activated carbon cartridge. In addition, if the flow of water is shut off by an electromagnetic valve during and after regeneration until the activated carbon becomes usable, the life of the activated carbon cartridge can be further extended.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a usage example in which a water purifier of the present invention is installed in a kitchen.

FIG. 2 is a sectional view of the water purifier shown in FIG. 1, and FIG.
1 is a cross-sectional view taken along the line II-II of FIG. 1 and is drawn so that the radial dimensions of the hollow fiber membrane module and the activated carbon cartridge are faithful.

FIG. 3 is an exploded perspective view of the water purifier shown in FIG. 1;

FIG. 4 is a plan view of the water purifier shown in FIG. 1 with a cap removed.

FIG. 5 is a bottom view of the water purifier shown in FIG. 1, with a bottom plate and an activated carbon cartridge removed.

FIG. 6 is a plan view of an activated carbon cartridge of the water purifier shown in FIG. 1;

FIG. 7 is a sectional view of an activated carbon cartridge of the water purifier shown in FIG. 1;

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a perspective view of a temperature sensing element assembly of the switching valve.

FIG. 10 is a block diagram of a control circuit.

FIG. 11 is a flowchart showing an operation of the control circuit of FIG. 10;

FIG. 12 is a flowchart showing an operation of the control circuit of FIG. 10;

FIG. 13 is a block diagram of a control circuit according to a second embodiment.

FIG. 14 is a flowchart illustrating the operation of the control circuit of FIG. 13;

FIG. 15 is a block diagram of a control circuit according to a third embodiment.

FIG. 16 is a flowchart illustrating the operation of the control circuit in FIG. 15;

[Explanation of symbols]

 10: water purifier 84: activated carbon cartridge (activated carbon container) 94: cartridge water inlet 102: cartridge water purification outlet 158: electric heater 170: thermistor (temperature detecting means) 180: control means 190: display panel 192: reproduction time setting Switch (playback time setting means) 194: Manual playback switch

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takafumi Oshima 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Totoki Kiki Co., Ltd. JP-A-1-262984 (JP, A) JP-A-2-133492 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 1/28

Claims (4)

(57) [Claims] 1. An activated carbon container having a water inlet and a purified water outlet and containing activated carbon, heating means for heating the activated carbon container to regenerate the activated carbon, and a preset activated carbon regeneration
Control means for automatically starting the driving of the heating means at every moment ;
In the regenerative water purifier provided with
Display means controlled and an activated carbon volume connected to the control means
Temperature detecting means for detecting the temperature of the vessel,
The stage uses a water purifier on the display means while the heating means is operating.
Prohibition is displayed and activated carbon volume after activated carbon regeneration ends
Detecting that the temperature of the vessel has dropped below a predetermined temperature.
After the means has been detected, the use permission is displayed on the display means.
Activated carbon regeneration type water purifier, characterized in that that. 2. The method according to claim 1, wherein the predetermined temperature is about 40.degree.
Activated carbon regeneration type water purifier according to claim 1. 3. A flow rate detecting means for detecting a flow rate of water is further provided.
In addition, the control means operates at a preset activated carbon regeneration time.
If the accumulated water flow does not reach the specified value, the activated carbon
3. The activity according to claim 2, wherein the regeneration is postponed.
Charcoal regeneration type water purifier. 4. An electromagnetic valve for controlling water flow to an activated carbon container.
In addition, the control means is provided at the start of the driving of the heating means.
After closing the solenoid valve, the temperature of the activated carbon
Opening the solenoid valve when the temperature drops below a predetermined temperature.
Activated carbon based on any one of claims 1 to 3
Raw water purifier.