JP2000312880A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the ejection of hot water being heated and steam from a cleaning water outlet to foul surroundings when a user passes water erroneously during heating/cleaning operation and on other occasions by providing a flow rate restricting means only in a cleaning water passage system for discharging hot water and steam in heating/cleaning. SOLUTION: City water is supplied from a water supply port 1, passes through a flow rate sensor 11, in ordinary use, flows from a three-way valve 12 in the water passage B direction (the first water passage 20), and reaches a hollow fiber membrane cartridge 2, active carbon 3, and a temperature sensitive valve 6. When a water temperature is in an ordinary use range or below, the active carbon 3 and a use water outlet 4, at a temperature above it, a clearing water outlet 7 are communicated. Upon the energization of a heater 5 by a control part 14 during heating/cleaning, the valve 12 is driven to change over to a water passage A (cleaning water passage 21) which makes the sensor 11 with a flow rate restricting means 13. Even when water passage is started during heating/cleaning, the instantaneous flow rate of water can be restricted by the means 13 to avoid the ejection of hot water and steam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cleaning type water purification apparatus using activated carbon.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of a conventional heat cleaning type water purification apparatus. A hollow fiber membrane cartridge 2 and activated carbon 3 are used as a water purification material, and a heater 5 is provided near the activated carbon 3. In a normal use state, water flowing from the water supply port 1 passes through the hollow fiber membrane cartridge 2 to remove turbid components. After that, it passes through the activated carbon 3, and at this time, trihalomethane or the like is adsorbed by the activated carbon 3, and is discharged from the used water spout 4. In addition, the activated carbon 3 is periodically heated and boiled by the heater 5 together with the retained water. As a result, the impurities adsorbed on the activated carbon 3 are desorbed into water, pass through the temperature sensing valve 6 together with the boiled steam, and are gradually discharged from the washing water spout 7. Here, the temperature sensing valve 6 switches the passage depending on the temperature of the water passing portion. 3 and the washing water discharge port 7 are communicated. For this reason, the water discharged from the cleaning water discharge port 7 is not used for drinking but is drained to the kitchen sink. An operation unit 10 for inputting the time of heating and interruption of the heating operation, a display unit 8 for confirming the setting, and a sound generating unit 9 for confirming a switch reception sound are provided. During heating, water flow is prohibited. If it is necessary to use the water purifier during the heating operation, enter the switch to interrupt the heating operation. When the water flows, the activated carbon 3 is sufficiently cooled and the temperature sensing valve 6 is activated. Then, the water that has been discharged from the cleaning water discharge port 7 until then is discharged from the use water discharge port 4, so that the user can use it for drinking.

[0003]

However, in this configuration, if the user accidentally passes water during the heating / cleaning operation, or if the user vigorously flows water after inputting a switch for interrupting the heating operation, the hot water or steam during the heating operation will be lost. Rapidly flows out of the washing water discharge port 7 and flows. The washing water discharge port 7 is simply attached using a suction cup or the like for drainage. However, there is a problem that the suction cup comes off due to the force of the water, the connection hose is violated, and the surroundings are soiled. there were.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention uses a activated carbon as a filter medium and heats and cleans the activated carbon. Only the flushing water channel system provided with flow rate limiting means was provided. Further, an electromagnetic valve or a motor valve was used as a means for switching between the water discharge passage and the washing water passage. Further, a flow restricting means was provided upstream of the activated carbon. Further, a solenoid valve or a motor valve was used as a means for switching between the water passage with and without the flow restricting means.

[0005] As described above, using activated carbon as a filter medium,
In the water purifier of the type in which the activated carbon is heated and washed, the flow rate limiting means is provided only in the washing water passage system for discharging hot water and steam during the heating washing, so that the heating washing and the heating washing interrupting operation are performed. Even if the user passes water, a large amount of water is not discharged and the instantaneous flow rate is limited.

Further, since the flow rate restricting means is provided in the washing water passage, there is no need to switch the water passage when shifting from the normal use state to the heating washing operation.

Further, since the flow rate limiting means is provided on the upstream side of the activated carbon, the pressure is reduced by the flow rate limiting means, and high pressure is not applied to the activated carbon.

Further, since the solenoid valve or the motor valve is used as the switching means between the water passage with the flow restricting means and the non-installed water passage, the water passage can be easily switched.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described. FIG. 1 is a block diagram of the main components. In a normal use state, supplied water such as tap water is supplied to the flow sensor 11.
To reach the three-way valve 12. The three-way valve 12 is such that a water passage is switched by a motor. During normal use, the direction of the water passage B (hereinafter referred to as the first water passage 20).
Since the three-way valve 12 and the hollow fiber membrane cartridge 2 are in direct communication with each other, water passes through the first water passage 20, and the hollow fiber membrane cartridge 2, the activated carbon 3, the temperature sensing valve 6
Reach The water passage of the temperature sensing valve 6 is switched according to the water temperature, and below the water temperature in the normal use range (35 ° C. in the first embodiment of the present invention), the activated carbon 3 and the use water discharge port 4 are not used. When the temperature is equal to or higher than the temperature, the activated carbon 3 and the washing water discharge port 7 are communicated with each other. Therefore, the water that has passed through the temperature sensing valve 6 is discharged from the used water discharge port 4.

[0010] Further, immediately after the power is turned on, the user sets the current time and the time of the heating cleaning, so that the heating cleaning is performed periodically thereafter. When the heating cleaning time comes, the control unit 14
When the flow to the flow sensor 11 and the flow restricting means 13 is started from the first water passage 20 which starts the energization of the flow passage and drives the three-way valve 12 to communicate between the flow sensor 11 and the hollow fiber membrane cartridge 2. Switch to water channel A (hereinafter referred to as washing water water channel 21). In addition, a signal is sent from the control unit 14 to the display unit 8 to indicate to the user that the apparatus is in the heating and cleaning state. When the user overlooks the indication that heating cleaning is being performed in this heating cleaning state and starts water supply, the water that has reached the three-way valve 12 is
Through the flow rate restricting means 13 and the hollow fiber membrane cartridge 2,
Reach activated carbon 3. Here, since the activated carbon part 3 is heated by the heater 5 as described above, the internal water is hot water or steam. Therefore, the water that has reached the activated carbon 3 pushes out the retained hot water and steam in the activated carbon unit 3. Since this is a high temperature, it is switched by the temperature sensing valve 6 and is discharged from the washing water discharge port 7. At this time, the instantaneous flow rate of flowing water is limited by the flow rate limiting means 13 and flows slowly,
The hot water and steam that are pushed out are also discharged only slowly from the cleaning water discharge port 7. At this time, since the flow sensor 11 detects that the water has been passed, the "heating cleaning" display on the display unit 8 flashes to urge the user to stop the water flow. Then, the sounding section 9 issues a warning sound.

The heating / cleaning time is set at night when it is not normally used. If the user needs to use the heating / cleaning at that time, the user presses the heating / cleaning stop switch of the operation unit 10. As a result, the operation shifts to the heating / cleaning interruption operation, the power supply to the heater 5 is stopped, and the display is switched to “heating / cleaning interruption”.
When the user allows water to pass in that state, the water passes through the three-way valve 12 through the flow rate restricting means 13 in the same manner as the water passing during the heating and washing,
Hot water and steam are discharged from the cleaning water discharge port 7. When the discharge temperature decreases due to this water flow and the control unit 14 detects that the water temperature has reached a normally usable water temperature by the water temperature detecting means 15, the three-way valve 12 is driven to switch the water flow path, and the “heat cleaning interruption” is performed. Disappears from the display. Further, the temperature sensing valve 6 switches the water channel due to a decrease in the water passage temperature, and is discharged from the used water discharge port 4.

[0012]

As described above, in the water purifier of the type in which activated carbon is used as the filter medium and the activated carbon is heated and washed, the flow rate limiting means is provided only in the washing water passage system for discharging hot water and steam in the heating washing. So that
Even if the user passes water during heating cleaning or heating cleaning interruption operation, a large amount of water is not discharged and the instantaneous flow rate is limited, so that hot water, steam, etc. are discharged vigorously from the cleaning water discharge port. There is no.

Further, since the flow rate restricting means is provided in the washing water passage, there is no need to switch the water passage when shifting from the normal use state to the heating washing operation, and the control operation can be simplified.

Further, since the flow rate limiting means is provided on the upstream side of the activated carbon, the pressure is reduced by the flow rate limiting means, high pressure is not applied to the activated carbon, and the weight and cost of the water passage member can be reduced. .

Furthermore, since the solenoid valve or the motor valve is used as the switching means between the flow passage provided with the flow restricting means and the non-installed water passage, the water passage can be easily switched and the control is easy.

[Brief description of the drawings]

FIG. 1 is a main block diagram according to a first embodiment of the present invention.

FIG. 2 is a main block diagram of a conventional heat cleaning type water purification apparatus.

[Explanation of symbols]

 3 Activated carbon 13 Flow control means 20 Washing water channel

Claims (4)

[Claims] 1. A water purifier using activated carbon as a filter medium and heating and cleaning the activated carbon, wherein a flow restricting means is provided only in a washing water passage system for discharging hot water and steam at the time of heating and washing. A water purification device characterized by the following. 2. The water purifier according to claim 1, further comprising a flow restricting means in the washing water passage. 3. The water purifier according to claim 1, further comprising a flow restricting means upstream of the activated carbon. 4. The water purifier according to claim 1, wherein an electromagnetic valve or a motor valve is used as a switching means for switching between the flow passage provided with the flow restricting means and the non-installed water passage.