JPH09206747A - Filter and hot water equipment provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a hollow fiber membrane for filtering a hot water and remove kalk, trihalomethane, musty order, red rust, etc., by using a heat resistant hollow fiber membrane as a filter material of a filter in a hot water equipment provided with the filter for filtering water. SOLUTION: In an electrical insulating pot as the hot water equipment capable of heating the water to >=60 deg.C, the filter for purifying the water in an inner vessel 14 is housed detachably as a filter cartridge 23 in the inside of a water purifying side 13. In this filter cartridge 23, the first filter 26 consisting of an activated carbon 25 and the second filter 28 consisting of the heat resistant hollow fiber membrane 27 are housed, and the second filter 28 is constituted by bundling many heat resistant hollow fiber membranes 27 densely without a gap and housing the membranes in a casing having a water permeable surrounding wall. This heat resistant hollow fiber membrane 27 is formed with polysulfon, polypropylene, etc., and a heat resistant material such as polyurethane, polypropylene and epoxy resin is used as a potting for fixing the heat resistant hollow fiber membrane 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for filtering water and a hot water apparatus equipped with the filter, and more particularly to a filter using a heat resistant hollow fiber membrane as a filter material.

[0002]

2. Description of the Related Art Conventionally, a filter used for purifying tap water usually uses activated carbon as a filter medium.
As a hot water device for purifying water with a filter made of this activated carbon, there is, for example, an electric insulation pot. In this conventional electric warming pot with a water purifying function, a pack containing activated carbon as a filter is housed in an inner container, and an immersion type for purifying by natural convection of hot water and a circulation pump 1 are provided as shown in FIG. There is a forced circulation type in which hot water in the inner container 2 forcedly circulated by the circulation pump 1 is purified by a filter cartridge 3 containing activated carbon as a filter.

As described above, in the conventional electric warming pot for purifying water by using activated carbon, it is intended to obtain tasty water by removing mainly scaly water, trihalomethane, musty odor from tap water. In this case, bleaching water, trihalomethane are used. In order to more surely remove musty odor, water is boiled and the boiling state is maintained for a certain period of time to be purified by activated carbon.

[0004]

The hot water equipment with a water purifying function includes, for example, a water purifier used by being attached to the outlet of a gas instantaneous water heater in addition to the above-mentioned electric heat retaining pot. As the vessel, a filter medium using activated carbon is used.

As described above, all the conventional filters have a structure in which water is purified by activated carbon. However, activated carbon causes red rust,
Turbidity, germs and algae cannot be removed. In addition, such as a water purifier that is attached to the outlet of a gas instantaneous water heater to purify water that is not in a boiling state even if it is hot water, it is possible to remove chlorinated water, trihalomethane, musty odor, etc. Uncertain.

[0006] In this respect, in the conventional electric insulation pot, water is purified by boiling it, so that chlorine, trihalomethane, musty odor, etc. can be almost completely removed, and bacteria are also killed, but the boiling state is maintained for a certain period of time. Since it has to be maintained for a long time, it consumes a large amount of electricity, and because it is purified by only activated carbon, it is difficult to remove red rust, turbidity, algae, etc., and they remain as they are.

[0007] In an electric insulation pot, when it is not desired to boil water, for example, when tap water is put in an inner container together with ice to keep it warm as cold water, even if the cold water is purified by activated carbon, red rust is generated. , Turbidity, algae, etc. will remain, and it will not be able to be sterilized because it is not boiled.

By the way, recently, it has been considered to use a hollow fiber membrane having an excellent filtering ability as a filter medium. This hollow fiber membrane is, for example, a hollow fiber having a diameter of 1 to 10 μm, and innumerable micropores of about 0.1 μm are formed in the peripheral wall thereof. Therefore, fine red rust, turbidity, miscellaneous bacteria, algae, etc. in water can be sufficiently removed. However, since conventional hollow fiber membranes do not have heat resistance, when hollow fiber membranes are used as a filter medium, they can be used only for normal temperature water of 40 ° C. or lower, for example, when immersed in warm water of 60 ° C. or higher, It could not be used for filtration of hot water, because it clogged or was torn immediately.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a filter which can use a hollow fiber membrane for filtering hot water, and a hot water apparatus including the filter.

[0010]

In order to achieve the above object, the filter of the present invention comprises a heat-resistant hollow fiber membrane. This heat resistant hollow fiber membrane can be formed from a heat resistant material such as polysulfone or polypropylene. By forming the hollow fiber membrane with a heat-resistant material in this way,
In a filter using this heat-resistant hollow fiber membrane as a filter material, there is no possibility that the hollow fiber membrane will be clogged or broken even when hot water is filtered.

In order to further prolong the service life of the filter, it is preferable that the potting for fixing the heat-resistant hollow fiber membranes in a bundled state is made of a heat-resistant material such as urethane, polypropylene or epoxy resin.

The heat-resistant hollow fiber membrane can be used in combination with activated carbon. By making it into a cartridge,
Exchange becomes easy when the water purification capacity is reduced. The filter is preferably provided with an air vent so that air is not accumulated in the storage portion of the heat resistant hollow fiber membrane.

The filter using the heat-resistant hollow fiber membrane as the filter material is 6
Used for hot water equipment handling water above 0 ° C, hot water equipment equipped with a heat source capable of heating water to above 60 ° C, water purifier attached to the water outlet of hot water equipment, water supply equipment that can also supply hot water, electric warming pot, etc. it can. With such a hot water device, various bacteria and algae can be removed without boiling water.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to examples. First, a first embodiment in which the present invention is applied to an electric heat-insulating pot as an example of a hot water device that handles water of 60 ° C. or higher and a hot water device that has a heat source that can heat supplied water to 60 ° C. or higher The description will be made with reference to FIGS.

In FIG. 1 and FIG. 2 showing the overall construction of the electric heat insulation pot, the main body 11 is composed of a front pot side 12 and a rear water purification side 13. The pot side 12 of the main body 11 is formed in a cylindrical shape with a bottom, an inner container 14 made of metal is disposed therein, and an upper lid 15 for opening and closing the inner container 14 is rotatably provided on the upper part. ing. And
An inner container 14 is provided on the inner bottom of the pot side 12 via a heating plate 16.
A heater 17 is provided as a heat source for heating the bottom of the container, and the heater 17 can heat the water supplied to the inner container 14 to 60 ° C. or higher. A temperature sensor 18 for detecting the temperature of the bottom of the inner container 14 is provided at the center of the heating plate 16. In addition, the bottom wall portion and the peripheral wall portion of the pot side 12, and the upper lid 15 all have a heat insulating structure filled with a heat insulating material.

A hot water discharge pump 19 is disposed below the pump side 12 of the main body 11, and an inner container 14 is provided on the suction side thereof.
Is connected to a suction pipe 20 connected to the bottom of the discharge pipe, and a discharge pipe 21 is connected to the discharge side. The discharge pipe 21 extends upward, and its tip projects downward from a projection 12a provided on the upper front side of the pump side 12 to form a spout 11a.

On the other hand, the purified water side 13 of the main body 11 is substantially U-shaped with its rear side and left and right sides open, and its open portion is closed by a cover 22. Inside the water purification side 13, a filter for purifying the water in the inner container 14 is unitized as a filter cartridge 23 and detachably stored. The cover 22 is detachably attached to the water purification side 13 by a known elastic engagement using elastic engagement claws.

The filter cartridge 23 has a cartridge case 24 in which a first filter 26 made of activated carbon 25 and a second filter 28 made of a heat-resistant hollow fiber membrane 27 are housed. That is, as shown in FIG. 5, an intermediate partition frame 29 and a lower partition frame 30 having water permeability are provided in the cartridge case 24, and the first filter 26 has a space between the partition frames 29 and 30. It is configured by filling activated carbon 25. In addition, non-woven fabric filters 31 and 31 made of heat-resistant fiber such as polypropylene are laid on the inner surfaces of the two partition frames 29 and 30, respectively, and the non-woven fabric filters 31 and 31 serve as intermediate partition frames in which the activated carbon 25 has water permeability. 29 and the lower partition frame 30 are prevented from spilling out.

On the other hand, the second filter 28 is constructed such that a large number of heat-resistant hollow fiber membranes 27 are tightly bundled together without a gap and housed in a case 32 having a peripheral wall having water permeability.
Are stored in the cartridge case 24 above the intermediate partition frame 29. In this case, both ends of the heat-resistant hollow fiber membrane 27 are fixed to the upper and lower inner surfaces of the case 32 by the potting 3
Embedded in 3.

Here, the heat-resistant hollow fiber membrane 27 has, for example, a diameter of 1
It is a hollow fiber of 10 μm and has innumerable fine holes of about 0.1 μm on its peripheral wall. The heat-resistant hollow fiber membrane 27 is formed of a heat-resistant material, such as polysulfone or polypropylene, that can withstand at least the heat retention temperature, which is the boiling temperature of 100 ° C. in this embodiment. The polycarbonate and the potting 33 are made of, for example, a heat resistant resin, specifically, a heat resistant material such as urethane, polypropylene or epoxy resin.

A water inlet 34 and a water outlet 35 are formed at the bottom of the cartridge case 24 so as to project therefrom.
The water inlet 34 communicates with the lower space of the lower partition frame 30, and the water outlet 35 connects with the intermediate pipe 3 integrally formed with the intermediate partition 29.
It is connected via 6 to an outlet 37 formed in the center of the bottom of the case 32 of the heat resistant hollow fiber membrane 27.

Therefore, the water supplied from the water inlet 34 is
As shown by arrows A and B in FIG. 5, it flows out from the lower partition frame 30 through the first filter 26 constituted by the activated carbon 25 to the upper space of the intermediate partition frame 29, and then the case 3
From the peripheral wall of No. 2, it passes through the second filter 28 composed of the heat-resistant hollow fiber membrane 27, and then flows out of the water outlet 35 through the outlet 37 and the intermediate pipe 36. In the second filter 28, water flows from the peripheral wall of the heat-resistant hollow fiber membrane 27 to the inside thereof in the process of flowing from the peripheral wall side toward the center of the case 32, and at that time, the water is removed by the peripheral wall of the heat-resistant hollow fiber membrane 27. It is filtered (purified).

As shown in FIGS. 1, 3 and 4, the water in the inner container 14 is circulated in the lower portion of the pot side 12 of the main body 11 as a water supply source for forcibly circulating it through the filter cartridge 23. A pump 38 is provided. A suction pipe 39 connected to the bottom of the inner container 14 is connected to the suction side of the circulation pump 38, and a discharge pipe 40 is connected to the discharge side. Then, the discharge pipe 40 is introduced from the pot side 12 to the inside of the bottom portion of the water purification side 13, and the tip end thereof is bent into a substantially inverted L shape to the connection port 41a of the tray 41 arranged at the inner bottom portion of the water purification side 13. It is connected.

Further, the receiving tray 41 is provided with another connecting port 41b, and the connecting port 41b is provided with a return pipe 42. The other end of the reflux pipe 42 is the purified water side 13
Is introduced into the pot side 12 and extends upward inside the pot side 12 to face the inside of the inner container 14.
Then, the filter cartridge 23 is detachably attached to the purification side 13 by inserting and connecting the water inlet 34 and the water outlet 35 protruding from the bottom of the cartridge case 24 into the connection ports 41a and 41b of the tray 41. ing.

A detection switch 43 as a detection means for detecting the mounting of the filter cartridge 23 is arranged below the tray 41. A rod-shaped projection 44 is provided as a manipulator on the bottom of the cartridge case 24 with respect to the detection switch 43.
By attaching 3 to the purified water side 13, this rod-shaped projection 4
4 is inserted into the through hole 45 formed in the tray 41. A compression coil spring 46 is provided in the through hole 45.
The operation rod 47 is urged upward by the above so as to be vertically movable. The operation rod 47 has a rod-shaped projection 44 and a through hole 45.
When it is inserted into the inside, it is pressed and moves downward, and the leaf spring 48 of the detection switch 43 is pressed to turn on the switch 53.

The upper surface of the protruding portion 12a on the pot side 12 serves as an operating portion 49 as shown in FIG. 2, and this operating portion 49 serves as an operating means for operating the hot water pump 19 as shown in FIG. Hot water switch 50, normal temperature water purification switch 51 as operation and operation means for circulation pump 38, and heat retention selection switch 5 as operation and operation means for circulation pump 38
2. A timer selection switch 53 is provided. Also,
The operation unit 49 includes a light-emitting diode 54 for displaying a power source, a light-emitting diode 55 for displaying a room temperature clean water operation, light-emitting diodes 56-49 for displaying a heat retention temperature selected by the heat retention selection switch 52, and a timer selection switch 53 for selection. Light emitting diodes 60 to 62 are provided to indicate the time of day.

Here, the heat retention selection switch 52 is the inner container 1
This is for setting the heat retention temperature when the water in 4 is heated by the heater 17 and kept warm.
It is possible to select from 0 ° C, 70 ° C, 80 ° C, and 90 ° C. When the heat retention temperature is set to 60 ° C., 70 ° C., and 80 ° C., the water in the inner container 14 is heated until it reaches the set heat retention temperature, and then the temperature is maintained at that temperature. . When the heat retention temperature is set to 90 ° C, the heater 17 keeps the temperature at 90 ° C after the water in the inner container 14 is once boiled. In addition, heat retention temperature 90
C. is displayed on the operation unit 49 as "high temperature".

The time selection switch 53 is used for the inner container 1
When it is desired to start heating the water injected into the heater 4 by the heater 17 after a desired time elapses, that is, to make a heating reservation, the time is set for 2 hours, 4 hours, You can choose from within 6 hours.

The electrical construction of this electric insulation pot is shown in FIG. In the figure, a pair of power lines 65 and 66 is connected to a power cord 64 having a plug 63 that is plugged into an outlet of a 100 V AC commercial power source, and a heater 17 and a relay 67 are connected between the power lines 65 and 66.
Series circuit, motor 68 of the hot water pump 19 and relay 69
Series circuit, motor 70 of relay pump 38 and relay 71
Series circuits are connected in parallel.

On the other hand, the control device 72 as a control means is mainly composed of a microcomputer (not shown), and the control device 72 has a temperature sensor 18, a detection switch 43, a hot water switch 50, and a room temperature water purification switch. 51,
Various signals are input from the heat retention selection switch 52 and the timer selection switch 53. Then, the control device 72 controls the light emitting diodes 54 to 62 and the relays 67, 69, 7 based on the input signals and a preset program.
Control 1

Next, the operation of the above configuration will be described with reference to the flowchart shown in FIG. When the plug 63 is inserted into a 100 V AC commercial power outlet, DC power is supplied to the controller 72. As a result, the microcomputer is initialized, and the control device 72 first determines whether or not the detection switch 43 is turned on (step S1).

When the filter cartridge 23 is mounted on the water purification side 13 of the main body 11, the detection switch 43
Is on, the control device 72 turns "YES" in step S1 and turns on the light emitting diode 54 for power supply display (step S2). After that, the control device 72 enters a state of monitoring whether the room temperature water purification switch 51, the heat retention selection switch 52, or the time selection switch 53 is operated (repeated execution of steps S3 to 5).

Now, in order to keep water warm by putting water in the inner container 14 and making it hot water for making milk to give to the infant, the heat retention selection switch 52 is operated to select a heat retention temperature of, for example, 70 ° C. Suppose Then, the control device 72 becomes "YES" in step S5, and causes the light emitting diode which displays the heat retaining temperature selected by the heat retaining selection switch 52 among the light emitting diodes 56 to 59, in this case, the light emitting diode 57 to blink (step S6). ).

Next, the controller 72 turns on the relay 67 to energize the heater 17 to start heating the water in the inner container 14 (step S7), and at the same time, turns on the relay 71 for a certain period of time to circulate the pump 38. For a certain period of time (step S
8). Then, the water in the inner container 14 is sucked into the circulation pump 38 via the suction pipe 39 and flows into the filter cartridge 23 via the discharge pipe 40.

The water that has flowed into the filter cartridge 23 is, as described above, the first filter 26 and the heat resistant hollow fiber membrane 2.
Although it passes through the second filter 28 composed of 7 in sequence and flows out from the filter cartridge 23, when it passes through the first filter 26, calcination, trihalomethane,
Musty odors are removed. Further, when the water passes through the second filter 28, the heat-resistant hollow fiber membrane 27 removes red rust, mold, turbidity, bacteria and algae. Then, the water flowing out from the filter cartridge 23 is circulated such that it is returned to the inside of the inner container 14 from the reflux pipe 42, and is sent to the filter cartridge 23 again by the circulation pump 38.

When such a water purification operation is performed for a certain period of time, the control device 72 turns off the relay 71 to stop the operation of the circulation pump 38, and the temperature detected by the temperature sensor 18 is set to the heat retention temperature set by the heat retention selection switch 52. (70 in this case
(° C) is reached and the state is monitored (step S
9). When the temperature detected by the temperature sensor 18 reaches the set heat retention temperature, in this case 70 ° C. (“YES” in step S9), the controller 72 sets the temperature detected by the temperature sensor 18 so as to maintain the heat retention temperature. Accordingly, the heater 17 is switched to the heat retention operation for controlling the disconnection (step S1).
0). In this heat retaining state, the light emitting diode 57 that displays the heat retaining temperature is switched to the constantly lit state.

By the way, when the water injected into the inner container 14 is not used as hot water immediately but used several hours later, the time selection switch 53 is operated to set the desired time. Then, the controller 72 proceeds to step S4.
Becomes "YES", then the light emitting diodes 60 to 6
The light emitting diode that displays the set time from 2 is turned on (step S11). Next, the control device 72 enters a state of monitoring whether or not the heat retention selection switch 52 is operated (step S12), and when the heat retention selection switch 52 is operated (“YES” in step S12), the light emitting diodes 56 to 59 are turned on. The light emitting diode that displays the set temperature is blinked (step S13).

After this, the control device 72 starts the time countdown and enters a state of monitoring whether or not the set time has elapsed (repeated execution of steps S14 and S15). When the set time has elapsed, the control device 72 turns off the time display light emitting diode (step S1).
6). Next, the controller 72 energizes the heater 17 to start heating the water in the inner container 14 (step S
7), the circulation pump 38 is operated for a certain period of time to purify the water in the inner container 14 through the filter cartridge 23 in the same manner as described above (step S8). Then, when the water in the inner container 14 is heated to the set temperature by the heater 17 (“YES” in step S9), the warming operation is started (step S10).

When the hot water switch 50 is operated during the warming operation, the controller 72 turns on the relay 69 to operate the hot water pump 19 while the hot water switch 50 is being operated.
As a result, the hot water in the inner container 14 is discharged from the hot water outlet 11a of the discharge pipe 21 and poured into a baby bottle or the like placed thereunder. In this case, since 70 ° C. hot water is supplied to the baby bottle, it is not necessary to spend much time to cool the baby bottle to the temperature to be given to the baby.

By the way, there is a case where water and ice are put in the inner container 14 to keep the temperature as cold water by utilizing the heat retaining property of the electric heat retaining pot. In such a case, after putting water and ice in the inner container 14, the room temperature water purification switch 51 is operated. Then, the control device 72 causes "YE
S ”, and then the light emitting diode 55 for normal temperature water purification display
Blinking (step S17), and then the relay 71
Is turned on for a certain period of time to operate the circulation pump 38 for a certain period of time (step S18). Thereby, the cold water in the inner container 14 is purified by the filter cartridge 23 in the same manner as described above.

When the operation of the circulation pump 38 is completed,
The control device 72 switches the light emitting diode 55 for normal temperature purified water display to a constantly lit state (step S19). When hot water discharge switch 50 is operated in this state, control device 72 turns on relay 59 and operates hot water discharge pump 19 while hot water discharge switch 50 is being operated. Thereby, the inner container 1
The cold water in 4 is discharged from the hot water outlet 11a of the discharge pipe 21 and poured into a cup or the like placed below it.

In the above description, it may have given the impression that the circulation pump 38 can be operated only in steps S8 and S18, but even if the temperature is kept warm, for example, the room temperature water purification switch 51 is turned on. It is programmed to operate the circulation pump 38 for a certain period of time when operated. Similarly, the operation of the hot water discharge pump 19 is programmed so that the hot water discharge pump 19 is operated by operating the hot water discharge switch 50 at any time.

By the way, activated carbon 25 and heat-resistant hollow fiber membrane 27
Since the purifying ability will decrease if it is used for a long period of time, it is necessary to replace it every certain period of time. In this case, remove the cover 22 on the water purification side 13 of the main body 11,
Then, the cartridge case 24 is removed from the purified water side 13. Then, since the detection switch 43 is turned off, the control device 72 controls the filter cartridge 2 until the detection switch 43 is turned on, for example, as shown in step S1.
It will be in a state of waiting until 3 is attached to the purified water side 13,
It is prohibited to energize the circulation pump 38.

The state in which the operation of the circulation pump 38 is prohibited when the filter cartridge 23 is removed in this manner is programmed not only at the time of executing step S1 but also at any time. When the new filter cartridge 23 is attached to the water purification side 13, the detection switch 43 is turned on, so that the control device 72 causes the circulation pump 3 to operate.
Release the operation prohibition state of 8.

As described above, according to this embodiment, since the filter cartridge 23 is constituted by the combination of the first filter 26 composed of the activated carbon 25 and the second filter 28 composed of the heat-resistant hollow fiber membrane 27, the calcination in water is performed. The musty odor, trihalomethane, etc. can be removed by the activated carbon 25, and the red rust, turbidity, mold, miscellaneous bacteria, algae, etc., which cannot be removed by the conventional filter cartridge, can be removed by the heat resistant hollow fiber membrane 27.

In this case, chlorine, musty odor, trihalomethane, red rust, turbidity, bacteria, etc. can be removed without boiling the water, so that the water injected into the inner container 14 is heated by the continuous energization of the heater 17, Immediately after the temperature reaches the heat retention temperature, the heater 17 can be turned on and off to start the heat retention operation of maintaining the heat retention temperature. Therefore, it is possible to save waste by heating the water once to the boiling temperature and then starting the heat retention operation from the time when the temperature falls to the heat retention temperature.

Further, since the heat-resistant hollow fiber membrane 27 is formed of a heat-resistant material that does not soften even at 100 ° C., the hot water in the inner container 14 may be purified during boiling as well as during heat retention. However, the heat-resistant hollow fiber membrane 27 is not softened by the heat of hot water at a high temperature, does not cause a problem such as clogging or tearing, and always exhibits a good water purification action.

Since water can be purified without boiling in this way, unlike in the conventional method in which once the water is boiled to the heat retention temperature and the heat retention operation is started, the oxygen in the water escapes due to the boiling. There is no. In particular, for example, in the case of adding black tea, considering that the fact that oxygen is contained in hot water is delicious, the effect of being able to purify without boiling is great.

Further, since the water can be purified without boiling it as described above, for example, chilly water, mold odor, trihalomethane, red rust, turbidity, germs, etc. were removed by passing cold water cooled with ice through the filter cartridge 23. You can drink it as delicious water.

On the other hand, in this embodiment, the first filter 26 and the second filter 28 are made into a cartridge, and the filter cartridge 23 is detachably attached to the purified water side 13 of the main body 11 from the outside. Filter cartridge 2
The replacement work of No. 3 can be performed easily and safely without touching the high temperature steam in the inner container 14. Further, since the filter cartridge 23 is not arranged in the inner container 14, the filter cartridge 23 is formed in a large size, and the activated carbon 25 and the heat resistant hollow fiber membrane 2 are formed.
7 can be stored in a large amount, and as a result, the water purification efficiency can be improved and the replacement period can be extended.

When the filter cartridge 23 is removed from the water purification side 13 for replacement, the detection switch 43 detects this and prevents the circulation pump 38 from operating. Therefore, the filter cartridge 23 is removed. It is possible to prevent the dangerous situation in which the circulating pump 38 is operated despite the presence of the hot water and the hot water in the inner container 14 is ejected from the discharge pipe 40. Water is first passed through the heat-resistant hollow fiber membrane 27, and then activated carbon 2
5 and the hot water discharge pump 19 may be replaced with a known pneumatic hot water supply device.

As described above, the filter 28 composed of the heat-resistant hollow fiber membrane 27 made of a heat-resistant material can be used only for purification of water up to about 40 ° C. in contrast to the conventional filter 28. It can also be used to purify high-temperature water of about ℃, and even if it does this, it will not be clogged or broken. Therefore, as will be described in the following second embodiment, the present invention can be applied to various hot water equipment and equipment used in a mode in which hot water is supplied from the hot water equipment.

This will be described below. Since the filters used in the second and subsequent embodiments are slightly different in construction from those described in the first embodiment, first, the filters will be described with reference to FIGS.
This will be described below. In the following, the same parts as those in FIGS. 1 to 8 will be denoted by the same reference numerals, and detailed description thereof will be omitted.

The filter shown in FIG. 9 is also unitized as a filter cartridge 73, and has a first filter 74 made of activated carbon 25 and a second filter 75 made of a heat-resistant hollow fiber membrane 27. In the first filter 74, the nonwoven fabric 31 made of heat-resistant fiber such as polypropylene is attached to one end of the case 76, and the activated carbon 2 is placed in the case 76 in this state.
5 is filled, and then the other end of the case 76 is attached with the same non-woven fabric 31 as described above to manufacture.

On the other hand, the second filter 75 is manufactured as follows. That is, as shown in FIG. 10A, a myriad of heat-resistant hollow fiber membranes 27 are folded into a U shape and bundled, and the air vent sheet 77 shown in FIG.
One turn as shown in. As shown in FIG. 11, the air vent sheet 77 is a polypropylene spacer 77a.
Porous polypropylene hydrophobic membrane 77b on both sides of
Is intermittently linearly heat-sealed, and an air passage 78 is formed between the heat-sealed portions. The hydrophobic film 77b has a property of allowing air to pass but not water.

Then, the bundle of heat-resistant hollow fiber membranes 27 around which the air vent sheet 77 is wound is housed in the case 79. At this time, the side where both ends of the heat-resistant hollow fiber membrane 27, which is bent in a substantially U-shape, is slightly projected from one end opening of the case 79. Next, a heat-resistant material such as urethane, polypropylene, or epoxy resin is poured into the inside of one end of the case 79 and hardened to form a potting 80 (see FIG. 12). By this potting 80, both ends of the heat resistant hollow fiber membrane 27 are fixed to the case 79 together with the air vent sheet 77. After that, the heat-resistant hollow fiber membrane 27 and the air vent sheet 77 protruding from the opening end of the case 79 are cut off.

As a result of this cutting, both ends of the heat-resistant hollow fiber membrane 27 are in a state where the hollow inside of the outer surface of the potting 80 is open to the outside of the case 79, and the air passage 78 of the air vent sheet 77 as an air vent is also provided. Figure 1
As shown in FIG. 2, the outer surface of the potting 80 is open to the outside of the case 79.

The first filter 74 and the second filter 75 are different cartridge cases 81 and 82, respectively.
The filter cartridge 73 is housed inside, and the cartridge cases 81 and 82 are screwed together to form a filter cartridge 73. The cases 76 and 79 and the cartridge cases 81 and 82 are made of polycarbonate, which is a heat-resistant resin, for example.

In the filter cartridge 73 constructed as described above, water flows in through the water inlet 81a provided in the cartridge case 81 of the first filter 75 and is first filtered by the activated carbon 25, and then the case of the second filter 75. The water flows into the case 79 through a large number of water passage holes 79a at the other end of the case 79. The water flowing into the case 79 flows into the hollow inside through the peripheral wall of the heat resistant hollow fiber membrane 27, and at that time, impurities are filtered by the fine pores of the heat resistant hollow fiber membrane 27. And
The water flowing into the hollow inside of the heat resistant hollow fiber membrane 27 finally flows out of the case 79 from the cut end of the heat resistant hollow fiber membrane 27 through the hollow inside and is provided in the cartridge case 82 of the second filter 75. It flows out from the water outlet 82a.

Now, the reason why the second filter 75 is provided with the air vent sheet 77 will be described. That is, when the heat-resistant hollow fiber membrane 27 is in a dry state, air passes through the fine pores of the heat-resistant hollow fiber membrane 27, as shown in FIG. In this dry state, when water flows into the case 79, the air in the case 78 is pushed by the inflow water and passes through the fine holes of the heat-resistant hollow fiber membrane 27, and finally the case 77.
It is discharged outside. Then, the water passes through the fine pores of the heat-resistant hollow fiber membrane 27, flows into the inside of the hollow as shown in FIG.

However, once the heat-resistant hollow fiber membrane 27 gets wet, as shown in FIG. 13 (c), water remains in the fine pores and air cannot pass through. For this reason, for example, when water is cut off, air collects in the water pipe, and when this enters the case 78, the air cannot pass through the fine holes and remains collected in the case 78. To pass this air through the micropores,
Since ordinary tap water pressure is not possible and requires a considerably high pressure, air remains in the case 79 and the filtration capacity of the heat resistant hollow fiber membrane 27 cannot be fully utilized.

In this regard, since the second filter 75 is provided with the air vent sheet 77, the air that has entered the case 79 passes through the hydrophobic film 77b and enters the air passage 78, and the air passage 78 It comes to come out of the case 79 from the end of 78. When the heat-resistant hollow fiber membrane 27 is filled with water by discharging the air, the water easily enters the hollow inside of the heat-resistant hollow fiber membrane 27 together with the water in the fine pores.

As described above, since the air does not remain in the case 79, the filtration capacity of the heat-resistant hollow fiber membrane 27 can always be fully utilized. The air bleeding sheet 77 is not limited to be wound around the outer circumference of the heat resistant hollow fiber membrane 27, but may be arranged so as to cross the bundle of the heat resistant hollow fiber membranes 27.

The second filter 75 as described above can be made into a cartridge integrally with the first filter 74 as shown in FIG. 9, but can also be made as a cartridge independently. A second embodiment shown in FIG. 14 shows an example in which the second filter 75 is individually made into a cartridge. Note that this second
The embodiment is applied to a cold water purifier and will be described below.

A mineral cartridge 84 and a filtration cartridge 85 are detachably housed in the inner container 83 of the cold / hot water purifier. The mineral cartridge 84 comprises a cartridge case 86 in which a non-woven fabric 87, an antibacterial activated carbon 88a, a barley stone 88b, a coral stone 88c, an antibacterial activated carbon 88a and a non-woven fabric 87 are housed in order from the bottom. And
This mineral cartridge 84 is connected to the discharge side of the circulation pump 89, and when the circulation pump 89 is operated, the cold water in the inner container 83 moves from the bottom to the top in the mineral cartridge 84 as indicated by arrow C. It circulates as it flows and is returned to the inner container 83. By such circulation of water, the antibacterial activated carbon 88a removes the odor of chlorine, musty odor, trihalomethane, etc. from the water in the inner container 14. Further, minerals are dissolved in cold water from the barley stones 88b and the coral stones 88c, and the cold water becomes delicious water containing minerals.

On the other hand, the filtration cartridge 85 is constructed by accommodating the second filter 75 shown in FIG. 9 in the cartridge case 90 in a state that is upside down from FIG. 9, and the discharge side of the hot water pump 91 and the discharge pipe 92. It is connected to the. Then, when the hot water pump 91 is operated, the cold water in the inner container 83 is sent to the second filter 75, and when passing through the heat resistant hollow fiber membrane 27, red rust, mold, turbidity, germs, etc. are removed. .
The cold water thus filtered by the heat-resistant hollow fiber membrane 27 is sent to the discharge pipe 92 through the inside of the cartridge case 90 as shown by the arrow D, and the water outlet 92a at the tip thereof.
Is poured into a cup or the like placed below. If a heater that heats the inner container 83 is provided, the hot water can be mineralized.

The third embodiment of the present invention shown in FIG. 15 is shown in FIG.
As shown in (1), the first and second filters 74 and 75 are integrally formed into a cartridge, and the cartridge is applied to a shower for a bath or vanity. This shower device is shown as an example of a device used in the form of being supplied with hot water from a hot water device, for example, an electric water heater or an instantaneous water heater.

The shower device 93 has a structure in which a shower fitting 95 is attached to the head of the handle portion 94.
4 is connected to a hot and cold water mixing faucet (not shown) by a flexible hose 96. The filter cartridge 73 shown in FIG. 9 is housed inside the handle portion 94.

When the handle of the hot and cold water mixing faucet is operated, the hot water from the hot water supply equipment and the tap water are mixed, and the hot water of appropriate temperature is sent to the shower device 93 from the flexible hose 96. The hot water sent to the shower 93 is sequentially filtered by the first and second filters 74 and 75, and is ejected from the shower fitting 95.

Here, the reason why the filter cartridge 73 is provided in the shower 93 is that when hair is washed without filtering tap water, the hair is discolored due to the action of trihalomethane, and odor or red rust adheres to the hair. Therefore, hot water is filtered by the first and second filters 74 and 75 in order to eliminate such a situation.

16 to 21 show a fourth embodiment in which the present invention is applied to a water purifier. As shown in FIG. 16, the water purifier 97 has a main body 98 accommodating the filter cartridge 73, a water inlet 99 connected to a water outlet of a hot water device, for example, an instantaneous water heater (not shown), and first to third. Outlet 100 ~
And 102. Further, the main body 98 is provided with an electrically operated valve as a water channel switching means, for example, an electromagnetic valve, a lever 103, and a display unit 104.

The solenoid valve has a water passage (shown by an arrow E in FIG. 16 for convenience) for letting out water (hot water) supplied from the water inlet 99 from the first water outlet 100 which is a raw water outlet.
The water supplied from the water inlet 99 is supplied to the filter cartridge 7
A water passage (shown by arrow F in FIG. 19) for purifying the water through the first filter 74 and the second filter 75 in this order in order to discharge water from the second water outlet 101, which is a purified water outlet, and the water inlet 9.
Reversely from the time of purification, the water supplied from 9 is passed through the second filter 75 and the first filter 74 in this order to wash them, and from the third outlet 102 as a wash water outlet. It selectively switches to a water passage (shown by an arrow G in FIG. 20) for discharging water.

On the other hand, the lever 103 can be switched to three positions other than the water stop position. When the lever 103 is set to those three positions, the raw water switch 105 and the water purification switch 106 shown in FIG. , The cleaning switch 107 is turned on. Then, the ON signals of the respective switches 105 to 107 are inputted to the microcomputer 108 as a control means provided in the main body 98, and the microcomputer 108 passes through the transistor 109 in response to the ON signals from the respective switches 105 to 107. The electromagnet 110, which is the drive source of the solenoid valve, is turned on / off to control the display unit 104.
Each of the raw water, purified water, and cleaning display LEDs 111a to 111c provided in the above is selectively turned on.

A temperature sensor 112 for water temperature detection is provided near the water inlet 99, and the detection signal is input to the microcomputer 108. Then, the microcomputer 108 displays the temperature detected by the temperature sensor 112 on the two 7-segment L provided on the display unit 104.
It is displayed on the EDs 113 and 114.

By the way, the microcomputer 108 integrates the time during which the water purification switch 106 is maintained in the on state (water purification time by the filter cartridge 73), and when it reaches a predetermined time, the display for washing display provided on the display unit 104 is performed. LED 115 is turned on, and after that, when the time during which the cleaning switch 107 is turned on (backwashing time of the filter cartridge 73) reaches a predetermined time as described later, the electromagnet 110 is turned off and the solenoid valve is stopped. Bring to water. This prevents wasteful use of hot and cold water. The cleaning display LED 115 is turned off.

When the hot water flow from the third water outlet 102 is stopped, the reset switch 116 provided on the main body 98 is operated to cause the microcomputer 108 to turn off the clean display LED 115 and to clear the clean water time and Clear the washing time counter so that you can newly count the cleaning time and washing time. The power source of this washing device is the battery 117, and when the power switch 118 provided on the main body 98 is turned on, the power is turned on.

Next, the operation of the above configuration will be described. Lever 1
When 03 is set to the water purification position, the solenoid valve forms the water passage F for water purification, so that the hot water discharged from the water outlet of the instant water heater will pass through the inlet 99 to the first filter 74 and the second filter 75. The second outlet 101 after being sequentially purified.
Is discharged from. Then, when the lever 103 is returned to the water stop position, the water is stopped. At this time, the microcomputer 1
In 08, the time from the start of water purification to the end is added to the counter.

When the accumulated purified water time reaches a predetermined time, the microcomputer 108 turns on the washing display LED 115 to indicate that it is time to wash the filter cartridge 73. Based on this display, lever 103
Is set to the clean water position, the solenoid valve will set the water passage G for cleaning.
In order to form the water, the hot water discharged from the water outlet of the instant water heater flows backward from the second filter 75 to the first filter 74 from the water inlet 99, contrary to the time of the purified water. At this time, the temperature of the hot water is 8
Adjust so that the temperature is 0 ° C, and pass hot water at 80 ° C.

Then, in the filter cartridge 73, the hot water flows into the hollow inside of the heat-resistant hollow fiber membrane 27, and the cartridge case 8 comes from the peripheral wall of the heat-resistant hollow fiber membrane 27.
The red rust and the like captured in the fine pores of the heat-resistant hollow fiber membrane 27 are removed when flowing out into the inside of the heat-resistant hollow fiber membrane 27. Then, the hot water flowing into the first filter 74 from the second filter 75 removes trihalomethane and the like captured by the activated carbon 25 while flowing in the cartridge case 81, and finally serves as a wash water discharge port. It is discharged from the third water outlet 102.

During the washing by the backflow of hot water, the microcomputer 108 integrates the washing time in the counter, and when the accumulated time reaches a predetermined time, the water is stopped. Therefore, the reset switch 116 is operated to turn off the washing display LED 115, and the lever 103 is returned to the water stop position.

FIG. 21 shows the result of an experiment for confirming the effect of the above-described backwashing. In the figure, the solid line H is the amount of trihalomethane in the tap water at the water inlet 99, the solid line I is the amount of trihalomethane of the water discharged from the second water outlet 101 when the purified water is continued without backwashing, and the solid line J is The amount of trihalomethanes of the water discharged from the second water outlet 101 when backwashing is performed every time the amount of purified water reaches 100 liters is shown.

As shown in the figure, when the backwashing is not carried out, the purifying function of the filter cartridge 73 gradually decreases, and the amount of trihalomethanes of the water discharged from the second water outlet 101 gradually increases. However, purified water volume 1
If backwashing is performed every 00 liters, the solid line J
The purifying function of the filter cartridge 73 is restored, as shown by, and trihalomethane can be favorably purified so as not to exceed 10 ppb.

As described above, since the first and second filters 74 and 75 can be washed by backflowing the hot water through the filters, the replacement period of the filter cartridge 73 can be remarkably lengthened.

In the above embodiment, the cleaning time is integrated, and when the integrated time reaches the predetermined time, it is judged that the cleaning time has come. However, the purified water amount is integrated by the water amount sensor, and the integration is performed. When the amount of water reaches the specified amount,
The configuration may be such that it is determined that the cleaning time has come. Also,
The determination of the end of cleaning may also be configured to end the cleaning when the amount of cleaning water reaches a predetermined amount regardless of time. Water stoppage at the end of backwashing may be performed manually.

The passage switching motor-operated valve is not limited to the electromagnet-driven type, but may be a motor-driven type, and is not limited to the motor-operated valve, and is a manual type that is switched in conjunction with the operation of the lever 103. It may be one.

22 to 24 show a fifth embodiment of the present invention. This embodiment is applied to a water supply device, and this water supply device has a water supply device main body 119 as shown in FIGS. 22 and 23.
A cold water tank 120 and a hot water tank 121 are provided inside, and a compressor 122, a condenser 123, and a condenser 123 that constitute a refrigeration cycle as a cooling mechanism are located behind these tanks 120 and 121 to cool the condenser 123. An air blower 124 and a dryer 125 that removes water from the refrigerant condensed by the condenser 123 are provided.

Then, as shown in FIG. 24, an evaporation pipe 126 constituting an evaporator of the refrigeration cycle is wound around the outer periphery of the cold water tank 120, and the liquid refrigerant supplied from the dryer 125 is in this evaporation pipe 126. The water in the cold water tank 120 is cooled by evaporation. The cold water tank 120 is covered with a heat insulating material 127. Meanwhile, the hot water tank 12
As shown in FIG. 25, a heater 128 is attached to the outer bottom portion of No. 1 so that the water in the hot water tank 121 is heated to hot water of 60 ° C. or higher by the heater 128.

Further, pumps 129 and 130 for cold water and hot water are arranged in the front part of the water supply body 119. Each of the pumps 129, 130 has a suction side in communication with the inner bottom of each of the cold water and hot water tanks 120, 121, and has a discharge side provided with a water injection port provided on a front upper projection 119a of the water dispenser body 119. 131, pouring port 132
To the pipes 133 and 134.

Now, both the cold water tank 12 and the hot water tank 12
The first filter 74 and the second filter 75 shown in FIG.
And filter cartridges 137 and 138 housed in 136 are detachably arranged.
Then, the water inlets 135a, 1 of the respective cases 135, 136
36a is opened in each of the tanks 120 and 121, and the water outlets 135b and 136b are connected to the suction sides of the pumps 129 and 130.

In the water supply device having the above structure, both tanks 12
When water is supplied into the tanks 0 and 121 and the power is turned on, the refrigeration cycle is operated, the water in the cold water tank 120 is cooled, the heater 128 is energized, and the hot water tank 121
The water inside is heated to hot water. The refrigeration cycle and the heater 128 are controlled by a controller (not shown) according to the temperature detected by a temperature sensor (not shown) that detects the water temperature in each of the tanks 120 and 121. Further, lids 139 and 140 for opening and closing the tanks 120 and 121 are pivotally provided on the upper portion of the water supply device main body 119.

When a water pouring switch or a hot water pouring switch (not shown) is operated, the cold water pump 129 or the hot water pump 130 is activated to cool the cold water in the cold water tank 120 to the first and second filters 74 of the filter cartridge 137. Suction through 75 or hot water tank 12
1 is sucked through the first and second filters 74 and 75 of the filter cartridge 138 to inject the water 13
1 or from the pouring port 132 to a cup or the like placed below.

As described above, according to this embodiment, since the compressor 122, the condenser 123, the air blower 124, and the dryer 125 of the refrigeration cycle are arranged inside the water supply device main body 119, both tanks 120 and 121 are placed in front. The tanks 120 and 121 of the cold water and the hot water can be placed in the water injection port 131 as compared with the case of arranging the tanks 120 and 121 rearward.
And a pipe 1 that connects them near the pouring port 132 and connects them.
The length of 33,134 can be shortened.

When the lengths of the pipes 133 and 134 are long, the amount of water accumulated in the pipes 133 and 134 also increases. Therefore, after the pumps 129 and 130 are started, the tanks 120 and 1
It takes a considerable amount of time for the cold water and the hot water in 21 to come out from the water injection port 131 and the hot water injection port 132, but in this embodiment, since the length of the pipes 133 and 134 can be shortened, they are collected in the pipes 133 and 134. You can reduce the amount of water,
Shortly after the start of the pumps 129 and 130, the tank 12
Cold water and hot water in 0,121 can be supplied to cups and the like.

Further, in this embodiment, since the filter cartridges 137 and 138 are housed in the tanks 120 and 121, unlike the case where they are arranged outside the tanks 120 and 121, cold water in the filter cartridges 137 and 138,
The warm water can be kept warm.

FIG. 25 shows a sixth embodiment of the present invention. Although this embodiment is also applied to the water supply device, the difference from the fifth embodiment is that the filter cartridge is provided only on the cold water side, and the filter cartridge is installed in the cold water tank 1.
It is located outside of 20.

That is, in the front part of the water supply body 119,
An accommodating portion 142 that detachably accommodates the filter cartridge 141 is provided. On the other hand, the filter cartridge 141 is configured by using the case 76 of the first filter 74 and the case 79 of the second filter 75 shown in FIG. 9 as a cartridge case and directly connecting both cases 76, 79. It is designed to be used upside down from the state shown in FIG.

Then, the case 7 of the upper second filter 75
The upper and lower surfaces of the lower case 76 of the first filter 74 are closed, and an inlet 143 connected to the discharge side of the cold water pump 129 is provided on the lower surface of the lower case 76 so as to project downward. In addition, a water supply pipe 144 that projects in the lateral direction is formed on the upper surface of the upper case 79, and the pouring port 131 of the water supply body 119 is provided at the tip of the water supply pipe 144.
An outlet 144a connected to the above is provided so as to project downward.

Further, a window 145 through which the inside can be seen is formed on the peripheral wall portion of the case 79 of the second filter 75 so that the heat resistant hollow fiber membrane 27 can be seen through the window 145. Has become.

On the other hand, a window 146 corresponding to the window 145 of the case 79 of the filter cartridge 141 is formed on the side surface of the storage section 142. In addition, a case 79 of the filter cartridge 141 is provided around the upper portion of the storage portion 142.
A groove portion 147 into which the water supply pipe 144 is fitted is formed. Then, the filter cartridge 141 is placed in the storage unit 1.
When the water supply pipe 144 is inserted into the groove 42 and fitted into the groove portion 147, the filter cartridge 141 is positioned and stored in the storage portion 142 in a normal state, and in this state, the window 145 of the cartridge case 141 and the storage portion are stored. Thirteen
Nine windows 146 will be matched. Therefore, the water supply pipe 144 and the groove portion 147 function as a positioning means for aligning the window 145 of the filter cartridge 141 with the window 146 of the storage portion 142.

In this embodiment having the above-described structure, the state of contamination of the heat-resistant hollow fiber membrane 27 can be observed through the windows 146 and 145. Therefore, the replacement time of the filter cartridge 141 can be known from the degree of contamination.

The filter of the present invention is not limited to an electric heat-insulating pot, a cold / hot water purifier, a shower, a water purifier, and a water dispenser, and can be widely used for purifying cold water, normal temperature water, hot water, hot water, or the like. Is something that can be done.

[0102]

As described above, according to the present invention, since the hollow fiber membrane has heat resistance, hot water or 60 ° C.
Even when the hot water exceeding the above is filtered, the hollow fiber membrane is not clogged or broken, and the life of the filter can be extended.

Further, in particular, in the invention as defined in claim 5, since the filter is constituted as a cartridge provided with the heat-resistant hollow fiber membrane and the activated carbon, the heat-resistant hollow fiber membrane and the activated carbon cooperate with each other to produce tap water. Bacteria, algae, and many other types of impurities can be removed rather than contained, and when the water purification function deteriorates, it can be easily replaced with a new one.

In the invention according to claim 7, since the air vent portion is provided, the heat-resistant hollow fiber membrane partially has a water purifying function by keeping the air trapped in the storage portion of the heat-resistant hollow fiber membrane. It is possible to prevent the occurrence of a defect such as not being presented.

According to the twelfth aspect of the invention, since the flow direction of water passing through the heat-resistant hollow fiber membrane is switched to the opposite direction for cleaning, the life of the filter becomes long. In this case, according to the thirteenth aspect of the present invention, since the cleaning time is notified by the usage time or the water flow rate, it is possible to know the time when the backflow cleaning is required. According to the fourteenth aspect of the present invention, the end time of the backflow cleaning is detected by the amount of water or the time from the start of the backflow cleaning, so that it is convenient to know the time when the backflow cleaning should be ended.

According to the fifteenth aspect of the present invention, since the inside of the filter cartridge can be observed through the transparent window, it is possible to easily know when to replace the filter cartridge. In this case, it is necessary to match the windows of both the main body and the filter cartridge, but in the invention according to claim 16, both windows can be easily matched by the positioning means.

According to the twentieth aspect of the invention, since the filter is constituted by combining activated carbon and a heat-resistant hollow fiber membrane, red rust, turbidity in water, germs, calcination, trihalomethane, musty odor, red rust, turbidity, germs Can be sufficiently removed without boiling. Therefore, it is possible to purify cold water and drink it as drinking water.

According to the twenty-first aspect of the present invention, even if the hot water at the heat retention temperature is purified, the heat resistant hollow fiber membrane does not soften and cause clogging, and the water can always be favorably purified. In the invention described in claim 22, the circulation pump can be operated to clean the water by operating the driving operation means.

According to the twenty-third aspect of the present invention, since the filter cartridge is constructed as a filter cartridge which is detachably provided from the outside of the main body, the replacement work can be easily performed. According to the twenty-fourth aspect of the present invention, since the circulation pump cannot be operated in the state where the filter cartridge is removed, it is possible to prevent the problem that the circulation pump is driven even though the filter cartridge is removed. be able to.

According to the twenty-fifth aspect of the invention, when the water contained in the inner container is heated to the heat retention temperature, the heat retention operation starts immediately. Therefore, after heating to the boiling temperature once, the temperature is kept waiting until the water falls to the heat retention temperature. Unlike the one that starts operation, it saves power.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a cover and a filter cartridge removed.

FIG. 3 is a partial vertical sectional side view showing a mounting configuration of a filter cartridge.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a vertical sectional view of a filter cartridge.

FIG. 6 is a plan view of the operation unit.

FIG. 7 is a block diagram of an electric circuit.

FIG. 8 is a flowchart.

FIG. 9 is a cross-sectional view showing another configuration of the filter cartridge.

FIG. 10 is a perspective view for explaining the manufacturing method of the second filter.

FIG. 11 is a partially enlarged perspective view of an air vent sheet.

FIG. 12 is a partially enlarged sectional view of a second filter.

FIG. 13 is a diagram showing a water-permeable and aerated state of the heat-resistant hollow fiber membrane.

FIG. 14 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 15 is a perspective view of a shower device according to a third embodiment of the present invention.

FIG. 16 is a perspective view of a water purifier showing a fourth embodiment of the present invention.

FIG. 17 is a front view of the display section.

FIG. 18 is an electric circuit configuration diagram.

FIG. 19 is a piping diagram showing a water channel configuration during water purification.

FIG. 20 is a piping diagram showing a water channel configuration during backwashing.

FIG. 21 is a graph showing the results of experiments on the effect of backwashing.

FIG. 22 is a perspective view of a water supply device showing a fifth embodiment of the present invention.

FIG. 23 is a cross sectional view.

FIG. 24 is a vertical side view of the cold water tank side.

FIG. 25 is a vertical side view of the hot water tank side.

FIG. 26 is an exploded perspective view showing a sixth embodiment of the present invention.

FIG. 27 is a partial plan view

FIG. 28 is a vertical cross-sectional side view showing an outline of a conventional electric insulation pot with a water purifying function.

[Explanation of symbols]

In the figure, 11 is a main body, 12 is a pot side, 13 is a purified water side, 1
4 is an inner container, 17 is a heater, 18 is a temperature sensor, 19 is a hot water pump, 22 is a cover, 23 is a filter cartridge, 25 is activated carbon, 27 is a hollow fiber membrane, 38 is a circulation pump, 43 is a detection switch (detection means). ), 51 is a room temperature water purification switch (driving operation means), 52 is a heat retention selection switch (driving operation means), 72 is a control device (control means), 73
Is a filter cartridge, 74 is a first filter, 75 is a second filter, 77 is an air vent sheet, 78 is an air vent passage (air vent), 83 is a mineral cartridge, 84 is a filter cartridge, 92 is a cartridge case, and 93 is a shower. Vessel, 97 is a water purifier, 119 is a water supply body, 12
0 is a cold water tank, 121 is a hot water tank, 129 is a cold water pump, 130 is a hot water pump, 141 is a filter cartridge, 144 is a water supply pipe (positioning means), 14
Reference numerals 5 and 146 are windows, and 147 is a groove (positioning means).

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number for FI Technical indication C02F 1/28 C02F 1/28 G (72) Inventor Hiroyuki Noguchi 33-Nanaishi, Nishi-ku, Nagoya No. 10 Toshiba Abu E Co., Ltd. Nagoya Office

Claims (25)

[Claims] 1. A filter comprising a heat-resistant hollow fiber membrane. 2. A hot water device for filtering water by the filter according to claim 1. 3. The filter according to claim 1, wherein the heat resistant hollow fiber membrane is formed of polysulfone. 4. The filter according to claim 1, wherein the heat resistant hollow fiber membrane is formed of polypropylene. 5. The filter according to claim 1, which is configured as a filter cartridge including activated carbon in addition to the heat-resistant hollow fiber membrane. 6. The filter according to claim 5, wherein the potting for fixing the heat resistant hollow fiber membrane is made of a heat resistant material such as urethane, polypropylene and epoxy resin. 7. The filter according to claim 1, further comprising an air venting portion for venting air from the housing portion of the heat resistant hollow fiber membrane. 8. The hot water apparatus for handling water at 60 ° C. or higher, wherein the filter is configured to filter water at 60 ° C. or higher. 9. The hot water apparatus according to claim 2, further comprising a heat source capable of heating the supplied water to 60 ° C. or higher. 10. The filter according to claim 1, which is used in a form in which hot water is supplied from a hot water device. 11. A water purifier which is attached to a water outlet of a hot water device and filters water supplied from the hot water device by the filter according to claim 1. 12. The water purifier according to claim 11, wherein the water purifier is configured to be capable of backwashing by switching the flow direction of water passing through the inside of the filter to the opposite direction. 13. The water purifier according to claim 11, wherein the water purifier has a function of notifying the time of backwashing by the use time or the amount of water flow. 14. The water purifier according to claim 11, wherein the water purifier has a function of detecting the completion of the backflow cleaning from the start of the backflow cleaning or the amount of water passing. 15. Having a tank for storing hot water and cold water,
A water supply device characterized in that the water in the tank is filtered by the filter cartridge according to claim 5. 16. The water dispenser according to claim 15, wherein both the filter cartridge and the water dispenser main body are provided with a window through which the inside of the filter cartridge can be seen. 17. The water dispenser according to claim 16, further comprising alignment means for aligning the windows of both the filter cartridge and the water dispenser body. 18. The water dispenser according to claim 15, wherein a cooling mechanism for cooling the cold water side tank is provided inside the water dispenser main body at a position behind the tank. 19. The water dispenser according to claim 15, wherein the cartridge is provided in the tank. 20. A body, an inner container provided in the body, a heater provided in the body for heating water stored in the inner container, and a circulation for circulating water in the inner container. An electric insulation pot comprising a pump and a filter for purifying water circulated by the circulation pump, wherein the filter is constituted by combining activated carbon and a heat-resistant hollow fiber membrane. 21. The electric heat-insulating pot according to claim 20, wherein the hollow fiber membrane is formed of a heat-resistant material capable of withstanding at least the heat-retaining temperature of hot water. 22. A driving operation means for manually operating the circulation pump is provided.
The electric insulation pot described in 0. 23. The electric insulation pot according to claim 20, wherein the filter is configured as a filter cartridge that is detachably attached to the main body from the outside. 24. The electric heat-insulating pot according to claim 23, further comprising detection means for detecting the removal of the filter cartridge and for prohibiting energization of the circulation pump when the filter cartridge is removed. 25. The electric heat insulation pot according to claim 20, further comprising a control means for raising the water poured into the inner container to the heat insulation temperature without boiling.