JP3112134B2 - 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]

BACKGROUND OF THE INVENTION tap water, residual chlorine in the chlorine sterilization hypochlorite ions (ClO ^-) or hypochlorite (HCl
O). The odor due to residual chlorine is commonly referred to as the odor of chalky, and is often disliked. In addition, a small amount of organochlorine compounds (trihalomethanes, mainly chloroform and bromodichloromethane) generated by the reaction between dissolved chlorine and organic substances are dissolved in tap water, and trihalomethanes are attracting attention as carcinogenic harmful substances. ing. In recent years, phytoplankton has tended to proliferate in water sources due to water pollution and eutrophication of water sources, and low-concentration odorous organic substances, which are considered to be metabolites or secretions of plankton, are dissolved in tap water. doing. Known as such plankton-derived odorants are 2-methylisoborneol and diosmin, which are called moldy odors or odorants because they have a moldy odor and are also avoided.

[0003] Such harmful substances and odorous substances are removed,
Conventionally, in order to obtain healthy and delicious water, a water purifier that removes these substances by adsorbing them on activated carbon has been used. However, when residual chlorine (hypochlorite ion or hypochlorous acid) is removed by activated carbon, bacteria are propagated on the activated carbon when the water purifier is not used, which is not hygienic.

Therefore, Japanese Patent Application Laid-Open No. 64-51189 proposes a water purifier provided with an electric heater so as to sterilize activated carbon with steam. When the switch is turned on and the heater is energized, the water in the water purifier is heated and turned into steam, and the activated carbon is sterilized. At the same time, the substance adsorbed on the activated carbon is desorbed by the action of water vapor, and the activated carbon is regenerated. Such an activated carbon regeneration type water purifier has an advantage that the purification ability of activated carbon can be maintained for a long period of time, and the running cost associated with replacement of an expensive activated carbon cartridge can be reduced.

[0005]

In the activated carbon regeneration type water purifier described in JP-A-64-51189 , activated carbon (adsorption
Material) There is a space filled with water above and below and around the filling container
Therefore, the amount of water to be evaporated increases by that much, and it takes time to regenerate the activated carbon and consumes a large amount of electric power.

It is an object of the present invention to activate quickly with little power.
It is to provide an activated carbon regeneration type water purifier capable of regenerating charcoal .

[0007]

Configuration of the Invention

The water purifier of the present invention has an activated carbon container formed of a metal can.
Is provided with a bottomed cylindrical body and a central outlet and is fastened to the body.
Upper lid, which is arranged at the center of the main body and is connected to the central outlet of the upper lid.
And a perforated cylinder that passes through. And around this perforated cylinder
The bottom and top lid of the body to improve heat transfer.
Activated carbon is placed in touch. An electric heater is brought into contact with the bottom of the activated carbon container in a heat transfer relationship, so that the metal container is heated from the bottom. The activated carbon container is made of metal can and has good heat conduction, so when the heater is activated, the heat of the heater is quickly transmitted to each part of the activated carbon container to boil the water remaining in the container and heat the activated carbon effectively. I do. Since the metal container is heated from the bottom, even if the level of the stagnant water falls with the evaporation of the stagnant water,
Boiling continues. Activated carbon located above the level of stagnant water is regenerated by the action of steam.

[0008] The outlet of the activated carbon container is located at the top of the container. When the metal container is heated from the bottom by the heater, the retained water becomes hot water, and a part thereof rises toward the outlet by convection. When the retained water starts to boil, the steam bubbles generated at the bottom of the vessel rise in the activated carbon layer toward the vessel outlet. At this time, a part of the stagnant water contained in the activated carbon layer is expelled from the activated carbon layer by the air pump action of the bubbles, and is discharged from the outlet at the upper part of the container. in this way,
When the heater is activated, a portion of the retained water is expelled from the activated carbon layer, so that the heater only needs to boil the remaining retained water. Therefore, activated carbon can be quickly regenerated with less power.

In a preferred embodiment, the activated carbon is
Is an activated carbon fiber. The bottom of the main body of the container and the top lid
An annular embossed part protruding inside the container is formed on the
The embossed portion is an activated carbon fiber disposed around a perforated cylinder.
Flow between the annular distribution passage and the perforated cylinder
To prevent short buses
You. A part of the bottom of the container body is raised
Temperature sensor for controlling the power supply to the heater
Deploy. In this way, as evaporation and water level drop,
Stagnant water remains at the bottom of the container where the activated carbon fiber is in contact
First, the center raised bottom is exposed from the accumulated water
The temperature rises faster than other parts, and the heater
Prevents overheating and burnout of activated carbon fiber by controlling energization
can do.

Further, there is an air gap between the heater and the bottom of the container.
Luminium heat transfer plate is placed and the entire bottom of the container is even
Heating to cause burning of activated carbon fiber due to local heating
Or to prevent deterioration or heat-resistant and corrosion-resistant resin on the inner surface of the container
Coating, electrolytic corrosion, stress corrosion cracking and scale adhesion
Is preferably prevented .

[0011]

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.

[0013] Generally speaking, 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. Heated from time to time,
It is 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.

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.

[0016] 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. A plurality of arcuate water inlet openings 94 are formed in the lid 90 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 fibers 98 is collected in the perforated cylinder 96, and is discharged from the outlet 10 of the cartridge 84.
Sent to 2.

In order to improve the corrosion resistance of the metal can 86, the inner peripheral surfaces of the body 88 and the lid 90 are coated with Teflon ( registered trademark of Polytetrafluoroethylene , DuPont ) or other heat resistant and corrosion resistant resin. Therefore, stress corrosion cracking of the metal can 86 is prevented, and scale adhesion is also prevented. Further, there is a possibility that electrolytic corrosion may occur at the contact portion between the metal and the activated carbon, but such electrolytic corrosion can be prevented by Teflon coating.

After the activated carbon fiber is filled, the body 8 of the metal can 86
An annular V-groove type embossed portion 104 is press-molded on 8 and the lid 90, and these embossed portions 104 bite into the upper and lower end surfaces of the activated carbon fiber layer. With such a configuration, a short flow path is prevented from occurring between the annular distribution passage 100 and the porous cylinder 96, and the clean water flowing into the cartridge 84 is reliably brought into contact with the activated carbon fibers.

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 the 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 sensing 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.

An inlet port 146 aligned with the outlet 102 of the activated carbon cartridge 84 is formed in the upper member 112 of the manifold assembly 110 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.
In order 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. 2, an operation / display panel 186 is provided on the circuit board 178.

As shown in FIG. 10, the thermistor 170
Is output to the control circuit 180 via the lead wire 188, and the control circuit 180 can be connected to the liquid crystal display section 190 and the switch input section 192 of the operation / display panel 186. The control circuit 180 is connected to the electric heater 158 via the thermal fuse 176. Control circuit 1
80 can be programmed so that the heater 158 is automatically driven by a timer every day when a predetermined time, for example, at midnight, arrives. The set time can be appropriately changed by operating the switch input unit 192. it can. The control circuit 1 also controls the heater 158 so that the heater 158 is energized when the user issues a command from the switch input unit 192.
80 can be programmed. The control circuit 180 monitors the temperature of the center raised bottom 168 of the cartridge 84 by monitoring the output of the thermistor 170.
It can be programmed to stop energizing the heater 158 when the temperature reaches ° C.

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 can be carried out regularly by the control circuit 180 every day when not in use, such as at night. Alternatively, the reproduction may be started in response to a user command by operating the switch 192. When the timer function of the control circuit 180 is activated or the heater 158 is energized by a user's command, the bottom of the activated carbon cartridge 84 is heated by the heater 158. Since the activated carbon cartridge 84 is formed of a metal can and has good heat conduction, the heat of the heater is quickly transmitted to each part of the cartridge 84 when the heater is operated, and the water remaining in the cartridge starts to boil.

As described above, since the check valve 62 is provided at the inlet of the hollow fiber membrane filter module 52,
The hot water and steam generated in the activated carbon cartridge 84 are
It rises 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 contacts the temperature-sensitive element 132. When the temperature sensing element 132 is heated, the valve head 134
And 136 move to the left in FIG. 2 to automatically close the purified water discharge passage 130 and
2 and the inlet port 146 are connected to the hot steam exhaust pipe 152.

Since the cartridge 84 is heated from the bottom by the heater, the generated hot water rises toward the cartridge outlet 102 by convection. When the retained water starts to boil, water vapor bubbles generated at the bottom of the cartridge pass through the activated carbon layer and rise toward the outlet 102. At this time, part of the stagnant water contained in the activated carbon layer is expelled from the activated carbon layer by the air pump action of the air bubbles, and the outlet 1
02 is discharged to the sink 12 through the drain hose 154. As described above, when the heater is activated, part of the retained water is expelled from the activated carbon layer, and the amount of residual water in the cartridge 84 is limited. Therefore, the temperature of the cartridge 84 is quickly increased, and the activated carbon is quickly activated. Can be played.

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.

The heater 158 is energized by thermistor 1
The temperature of the central raised bottom 168 of the cartridge 84 as detected by 70 is maintained, for example, above 120 ° C. As the accumulated water in the cartridge 84 evaporates, the level of the accumulated water drops.
Since 68 is a raised bottom, the center raised bottom 168 is first exposed from the stagnant water as the evaporation and the water level decrease, and the temperature rises faster than the other parts. Therefore, the thermistor 17
The temperature of the center raised bottom 168 detected by
Even when the temperature reaches 0 ° C., since the retained water remains at the bottom of the cartridge 84, the activated carbon fibers are not overheated, and burning of the activated carbon fibers can be prevented.

Central raised bottom 1 of activated carbon cartridge 84
When the temperature of 68 exceeds 120 ° C., the control circuit 180 terminates the energization of the heater 158. Cartridge 84
When the ambient temperature of the temperature-sensitive switching valve 128 becomes 50 ° C. or less, the temperature-sensitive switching valve 128 automatically connects the outlet 102 of the cartridge 84 to the purified water discharge passage 130.
Connect to and prepare for use.

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, the hollow fiber membrane filter module 52 can be omitted.
Instead of the hollow fiber membrane filter, a nonwoven fabric filter, a sintered filter, a pleated filter, or another filter may be used.

[0037]

As described above, the water purifier of the present invention has
The activated carbon container has a bottomed cylindrical body and a central outlet.
An upper lid fastened to the main body,
A porous cylinder communicating with the central outlet of the lid,
Activated carbon contacts the bottom and top lid of the body around the cylinder
Water inlet to the container is half of the central outlet
The upper lid is formed radially outside, and the
The air heater is brought into contact with the bottom of the
So the heater heats the metal container from the bottom
Then, the stagnant water becomes hot water, and part of it exits by convection.
And part of the water retained in the container is discharged from the outlet.
Will be issued. When the remaining water starts to boil,
The generated water vapor bubbles move the activated carbon layer upward toward the container outlet.
At this time, the air bubbles act on the activated carbon layer
Some of the retained water contained is expelled from the activated carbon layer and
It is discharged from the upper outlet. Thus, when the heater is activated
Some of the accumulated water is expelled from the activated carbon layer in
The heater only needs to boil the remaining stagnant water.
Charcoal is placed in contact with the bottom and top lid of the main body and stays
Activated carbon can be quickly regenerated with a small amount of electric power, in combination with the reduced amount of water .

According to a preferred embodiment of the present invention,
An embossed portion 104 is provided on the bottom of the cartridge 84 and the lid 90.
When molded, water short bath is prevented and advanced
Can be purified.

A raised bottom is formed at the bottom of the cartridge 84.
Where a temperature detecting element such as a thermistor is placed
In this case, it is necessary to prevent burning of the activated carbon fiber due to overheating.
Can be.

The inside surface of the cartridge 84 is
Coated with fluoroethylene or other heat and corrosion resistant resin
Prevents corrosion, stress corrosion cracking and scale adhesion
can do.

When the aluminum plate 160 is sandwiched between the bottom of the cartridge 84 and the heater 158, the entire bottom of the cartridge 84 can be uniformly heated, so that the activated carbon fibers are not burned or deteriorated by local heating. Can be prevented.

[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 illustrating a connection relationship with a control circuit.

[Explanation of symbols]

 10: Water purifier 84: Activated carbon cartridge 88: Activated carbon cartridge main body 90: Activated carbon cartridge lid 94: Activated carbon cartridge water supply inlet 96: Activated carbon cartridge porous cylinder 102: Activated carbon cartridge central outlet 104: Embossed section 158: Electric heater 168: Raised bottom of activated carbon cartridge

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hidemine Miyahara 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Totoki Equipment Co., Ltd. Shokai 61-200198 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/28

Claims (5)

(57) [Claims] 1. An electric heater for purifying clean water by bringing clean water into contact with activated carbon contained in a metal activated carbon container.
In the activated carbon regeneration type water purifier, the activated carbon is regenerated by heating the container at any time according to the method, wherein the activated carbon container has a bottomed cylindrical main body and a central outlet.
The upper lid fastened to the main body and the front lid located at the center of the main body
A perforated cylinder communicating with the central outlet.
Activated carbon is in the box in contact with the bottom and top lid of the body.
Located, the water inlet to the vessel is radial to the central outlet
The electric heater is formed in the upper lid on the outside, and the electric heater is brought into contact with the bottom of the container in a heat transfer relationship. Boiling accumulated water, convection of hot water and activated carbon container
Pumping of water vapor bubbles generated at the bottom of the container
An activated carbon regeneration type water purifier characterized in that a part of the retained water is discharged from the outlet . 2. The activated carbon is activated carbon fiber,
An annular protruding inside the container on the bottom of the container and the top lid
Embossed portion is formed, and the embossed portion is
It is noted that it is biting into the activated carbon fiber
Activated carbon regeneration type water purifier according to claim 1. 3. A part of the bottom of the main body of the container is a raised bottom.
The raised bottom controls the power supply to the heater.
A temperature detecting element for
Activated carbon regeneration type water purifier based on claim 1 or 2. 4. Between the heater and the bottom of the container,
The heat transfer plate of aluminum is arranged.
Activated carbon regeneration type water purification based on any one of claims 1 to 3.
vessel. 5. The container has an inner surface made of a heat-resistant and corrosion-resistant resin.
5. The coating according to claim 1, wherein
Activated carbon regeneration type water purifier based on either.