JP2003062559A - Water treating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treating apparatus which includes a water treating part for treating raw water and a water quality measuring device for measuring the quality of water after the treatment of the raw water in the water treating part and can prevent the adherence of air bubbles in a sensing part of the water quality measuring device to prevent the occurrence of abnormal output and can accurately measure the quality of the treated water. SOLUTION: In this water treating apparatus, the water quality measuring device 2 comprises a test water container 3, to which as-treated water is supplied, and the sensing part 4 which comes into direct contact with water at the time of water quality measurement. The water treating apparatus includes a switching mechanism such that, upon the stop of water treatment operation in the water treating part 1, the sensing part 4 is switched, from the state of contact with water within the test water container 3, to the state of noncontact with water, and is then switched again to the state of contact with water within the test water container 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment device for treating raw water, such as a water purifier or an alkaline ionized water conditioner, and more particularly to a water quality measuring device for detecting the quality of treated water. The present invention relates to a water treatment device.

[0002]

2. Description of the Related Art Conventionally, sensors for detecting water quality are not only used for research, but also for industrial equipment (see Japanese Patent Laid-Open No. 59-6988) and household equipment (see Japanese Utility Model Laid-Open No. 56-22093). It is used by incorporating it. In recent years, as a sensor for water quality detection, in order to detect and display the water quality with household water treatment equipment, or to control the device with the detected water quality,
Incorporated a water quality measuring instrument equipped with a sensitive part that comes into contact with the water to be measured in order to detect a specific water quality, such as one with a working electrode consisting of a glass sensitive membrane electrode or an ion selective electrode and a reference electrode. Electrolyzed water generators (Japanese Utility Model Laid-Open No. 5-22093, JP-A-5-647) have been put into practical use as products using the water quality measuring device.
No. 85, etc.) and a bath water bath (Japanese Patent Laid-Open No. 6-3356).
No. 75, etc.) has also been proposed.

In such a water treatment device, when a water quality measuring device is used, air bubbles adhere to the sensitive part of the water quality measuring device, which interferes with detection of the water quality and produces an abnormal output, thereby accurately measuring the water quality. May not be possible. For example, in the case of an electrolyzed water generator such as an alkaline ionized water device, when electrolyzing raw water in an electrolyzer, which is a water treatment section, hydrogen, oxygen, chlorine gas, etc. are generated by the following reactions. A component is generated, and this gas component adheres to the sensitive part such as the working electrode when the water quality is detected by the water quality measuring device and grows to form bubbles that cover the sensitive part, making accurate water quality measurement impossible. Is.

[0004] Cathode side reaction ^{_{2H 2 O + 2e - → 2OH}} - + H 2 · anode reaction ^{_{2H 2 O → 4H + + O}} 2 + 4e - 2Cl - → Cl 2 + 3e - Therefore, the conventional electrolytic water or the like containing such a gas component When measuring water quality with a water quality measuring device, Japanese Patent Laid-Open No. 9-236570
As disclosed in Japanese Patent Publication, a pulsation generator is provided upstream of the water introduction part of the pH sensor (water quality measuring device),
Alternatively, as disclosed in Japanese Unexamined Patent Publication No. 9-243588, by providing a spiral guide member in the space between the water introducing portion and the discharging portion of the pH sensor (water quality measuring device), the sensitive portion is provided. A technique for removing adhered bubbles has been proposed.

[0005]

However, in the case of removing bubbles in the sensitive section as described above, the occurrence of abnormal output is suppressed by removing the bubbles from the sensitive section to some extent. It was difficult to completely remove air bubbles, and accurate water quality measurement was still difficult.

The present invention has been made in view of the above points, and is provided with a water treatment section for treating raw water and a water quality measuring instrument for measuring the water quality of the water after the treatment by the water treatment section. To provide a water treatment device capable of accurately measuring the water quality of treated water by preventing bubbles from adhering to the sensitive part of the water quality measuring device to prevent abnormal output from occurring. It is intended.

[0007]

A water treatment apparatus according to claim 1 of the present invention comprises a flow passage extending from an inflow port to an outflow port, and a water treatment section 1 for treating raw water flowing through this flow channel. In a water treatment device comprising a water quality measuring device 2 for measuring the water quality of the water after the treatment by the water treatment part 1, the water quality measuring device 2 supplies water to the water when the water quality is measured and a test container 3 to which the treated water is supplied. When the water treatment operation of the water treatment section 1 is stopped, the sensitive section 4 is in contact with the water in the test water container 3 and the sensitive section 4 comes into contact with the water. It is characterized by comprising a switching mechanism for switching to a state in which the sensing unit 4 is in contact with the water in the test water container 3, and then to a state in which the sensing unit 4 is in contact with water.

According to the invention of claim 2, in claim 1, the downstream side of the treated water channel 5 through which the water after the treatment by the water treatment section 1 flows is a drainage channel 6 and a supply of a diameter smaller than the drainage channel 6. It is branched into the flow path 7, the opening / closing valve 8 is provided in the drainage flow path 6, and the downstream side of the supply flow path 7 is connected to the storage section 9 for storing the treated water, and the storage section 9 and the water detection container 3 are connected. It is characterized in that a switching mechanism is constituted by connecting the above with a connecting pipe 10.

According to a third aspect of the present invention, in the first aspect, the downstream side of the treated water flow path 5 through which the water treated by the water treatment section 1 flows is connected to the lower portion of the test water container 3, and the water test container 3 is connected. As a flow path for water flowing out from the inside, the lower outflow passage 11a is connected to the lower part of the water detection container 3 and the lower outflow passage 11a is connected.
Above this, the switching mechanism is configured by connecting the upper outflow passage 11b to the water sample container 3 and providing the open / close valve 8 in the lower outflow passage 11a.

Further, the invention of claim 4 is such that, in claim 1, the downstream side of the treated water channel 5 through which the water treated by the water treatment section 1 flows is connected to the test water container 3, and the treated water channel 5 is bypassed. The bypass flow path 12 for controlling the flow of water is provided in the middle of the piping of the bypass flow path 12 for storing the treated water, and the water flow adjusting device 13 for controlling the flow of water on the downstream side of the storage part 9. A drainage channel 6 is provided so as to be branched from the treated water channel 5 between the confluence of the downstream end of the channel 12 and the treated water channel 5 and the test water container 3, and an opening / closing valve 8 is provided in the drainage channel 6. Thus, the switching mechanism is configured.

Further, the invention of claim 5 is such that, in claim 1, the downstream side of the treated water flow path 5 through which the water treated by the water treatment section 1 flows is connected to the test water container 3, and the test water container 3 is tested. The outflow passage 11 through which the water flowing out from the water container 3 flows is connected, the open / close valve 8 is provided in the outflow passage 11, and the air pump 14 for sending air into the water inspection container 3 is provided in the water inspection container 3. Thus, the switching mechanism is configured.

Further, the invention of claim 6 is such that, in claim 1, the downstream side of the treated water flow path 5 through which the water treated by the water treatment section 1 flows is connected to the test water container 3, and the water test container 3 is tested. The outflow passage 11 through which the water flowing out from the water container 3 flows is connected, the treated water passage 5 and the outflow passage 11 are formed of a deformable flexible material, and the vertical direction of the water quality measuring device 2 is increased. It is characterized in that the switching means is constituted by adjusting the arrangement position.

The invention of claim 7 is characterized in that, in claim 6, an operating lever 15 for manually adjusting the vertical arrangement position of the water quality measuring device 2 is provided.

The invention of claim 8 is characterized in that in claim 6, the water quality measuring instrument 2 is provided with a drive source 17 for connecting the shaft 16 and driving the shaft 16 in the vertical direction. .

According to a ninth aspect of the present invention, in the first aspect, the holder body 18 for holding the sensitive section 4 is moved up and down with respect to the test water container 3 in a state in which the sensitive section 4 is arranged in the test water container 3. By freely providing the water quality measuring device 2, and by providing the water detection container 3 with a vent hole 19 that is closed when the holder body 18 moves downward and is opened when the holder body 18 moves upward. It is characterized by comprising a switching mechanism.

According to a tenth aspect of the present invention, in the ninth aspect, the holder body 18 is provided with the electromagnet 20a, and another electromagnet 20b is provided above or below the electromagnet 20a, and the electric power supplied to each of the electromagnets 20a and 20b. It is characterized in that the arrangement position of the holder body 18 in the vertical direction can be adjusted by controlling.

The invention of claim 11 is characterized in that, in claim 9, the shaft 16 is connected to the holder body 18 and a drive source 17 for driving the shaft 16 in the vertical direction is provided. .

The twelfth aspect of the present invention provides the first aspect.
In any one of the above items, a water passage detection unit 21 for detecting the presence or absence of water flow in the passage is provided in the passage extending from the inflow port to the outflow port.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

In the water treatment device according to the present invention, an electrolytic cell, a purification filter, a mineral content adding device, etc. are arranged as the water treatment part 1 in the middle of the piping of the flow path from the inflow port to the outflow port,
A water quality measuring device 2 for measuring the water quality of the water (treated water) after being treated in the water treatment portion 1 is arranged downstream of the water treatment portion 1.

The water quality measuring device 2 is used to measure the p
It measures water quality such as H, ion concentration, and electric conductivity, and in the embodiment shown in FIGS. 1 to 6 described later, the water quality measuring device is a water sample container 3 to which treated water to be detected is supplied.
And a holder body 18. Water test container 3
Is a container having an upper opening, and a watertight material 25 made of an O-ring, a packing material or the like is provided on the inner peripheral surface thereof. The holder body 18 holds detection terminals 22 such as reference electrodes and working electrodes, and the detection terminals 22 are arranged so as to extend downward from the housing 23 of the holder portion 18. The detection terminal 22 has the sensitive section 4,
The water quality is measured by bringing the sensitive section 4 into direct contact with the water to be measured. For example, when the detection terminal 22 is composed of a working electrode such as a glass electrode or an ion selective electrode and a reference electrode, a glass sensitive film of the glass electrode, an ion selective sensitive film of the ion selective electrode, a liquid junction of the reference electrode. The section becomes the sensitive section 4. Then, the holder body 18 and the test water container 3 are integrated by sliding the outer peripheral surface of the housing 23 to the inner peripheral surface of the test water container 3 in a state where the sensitive portion 4 is arranged in the test water container 3. The water quality measuring device 2 is configured. At this time, the watertight material 25 is interposed between the outer surface of the housing 23 and the inner surface of the water detection container 3 to ensure watertightness.

The water quality measured by this water quality measuring device 2 is
In order to display the quality of the treated water produced by the user by displaying it on an appropriate display means, or to control the treatment conditions so that the treated water produced in the water treatment section 1 has a desired quality. Used for.

According to the present invention, when the supply of water from the inflow port is stopped, the sensitive part 4 of the water quality measuring device 2 does not come into contact with the treated water, and then the sensitive part 4 is immersed in the treated water. Accordingly, the sensitive unit 4 is provided with a switching mechanism for switching to a state in which the sensitive unit 4 is brought into contact with water, whereby bubbles on the surface of the sensitive unit 4 are removed after the water treatment operation is stopped, and the water quality measuring device 2
The generation of abnormal output is suppressed and the water quality is accurately measured.

Specific embodiments will be shown below.

In the embodiment shown in FIG. 1, the downstream side end portion of the raw water flow path 24 whose upstream side communicates with the raw water inlet is connected to the water treatment section 1. Further, a treated water flow path 5 through which raw water (treated water) after being treated in the water treatment section 1 flows is derived from the water treatment section 1, and a pressure sensor is provided in the middle of the piping of the treated water flow path 5. Alternatively, a water flow detecting unit 21 including a flow rate sensor or a combination thereof is provided. Further, the treated water channel 5 is connected to the drainage channel 6 on the downstream side,
The drainage channel 6 is branched into a supply channel 7 having a smaller diameter. The drainage channel 6 extends downward on the downstream side, and an opening / closing valve 8 including an electromagnetic valve is provided in the middle of the pipe. Further, the supply flow path 7 extends laterally on the downstream side, and its downstream end is connected to the side surface of a storage section 9 formed of a hollow container. A connecting pipe 10 is led out from the bottom of the storage part 9, and the downstream end of the connecting pipe 10 is connected to the lower side surface of the water measuring container 3 of the water quality measuring device 2 so as to communicate therewith. Further, from the test water container 3, the connecting pipe 10
The outflow passage 11 is led out from the side surface above the connection position of the above and above the arrangement position of the sensitive section 4,
The downstream side of the outflow channel 11 is connected to the outflow port. Although not shown, a control unit that controls the operation of the on-off valve 8 based on the detection result of the water flow detection unit 21 is also provided.

In the water treatment apparatus constructed as described above, raw water is supplied from the inflow port during the water treatment operation, and the raw water flows through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5. At this time, the water flow detection unit 21 detects the flow of water, and when the water flow detection unit 21 inputs the detection result to the control unit, the control unit closes the open / close valve 8 and the water flow in the drainage flow path 6. Control to prevent Therefore, the treated water flows from the treated water channel 5 through the supply channel 7 to the storage section 9
After the treated water flows into the inside of the storage unit 9 and the treated water is once stored in the storage unit 9, it flows into the test water container 3 of the water quality measuring instrument 2 through the connecting pipe 10, and in the test water container 3, the sensitive section 4 of the holder body 18 is introduced. Is immersed in the treated water and the water quality is measured. Next, the treated water is sent to the outflow port through the outflow passage 11 and led out of the apparatus.

When the water treatment operation is stopped by stopping the water supply from the inflow port, the treated water does not flow out from the water treatment section 1 to the treated water passage 5, and the treated water is treated in the treated water passage 5. Water accumulates and treated water does not flow. At this time, the water flow detection unit 21 detects that water is not flowing, and when the detection result is input to the control unit, the control unit opens the on-off valve 8 to cause the water flow in the drainage flow path 6. Open. Therefore, the treated water accumulated in the treated water channel 5 preferentially flows into the drainage channel 6 having a larger diameter than the supply channel 7,
The water is drained through the drainage channel 6, and at this time, the treated water in the reservoir 9 flows back into the drainage channel 6 due to the aspiration effect, so that the treated water in the reservoir 9 flows into the drainage channel 3 and Of the treated water flows backward through the connecting pipe 10 and flows toward the storage section 9, and the flow of these treated water is ensured by the air flowing from the outflow passage 11 into the test water container 3. . Therefore, the liquid level in the test water container 3 is lowered and the sensitive part 4 is arranged above the liquid level. At this time, bubbles are attached to the sensitive part 4 during the measurement of the quality of the treated water. If so, relatively large bubbles are removed from the sensitive section 4 and discharged from the drainage channel 6 together with the treated water.
Further, the control unit opens the on-off valve 8 again after a certain period of time that elapses from the time when the on-off valve 8 is opened to the time when the liquid level in the sample container 3 is lowered and the sensitive unit 4 is arranged above the liquid level. Control to close. At this time, the treated water in the storage unit 9 flows into the test water container 3 through the connection pipe 10, and the sensitive unit 4 is immersed again in the treated water.
If small air bubbles remain, the air bubbles are removed and diffuse into the treated water.

Therefore, each time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of bubbles adhering to the sensitive portion 4.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

In the embodiment shown in FIG. 2, although not shown, the water treatment section 1 in which the raw water flow path 24 and the treated water flow path 5 are connected is provided similarly to that shown in FIG. 1, and the treated water flow path is provided. 5
A water flow detection unit 21 is provided in the. Further, the treated water flow path 5 led out from the water treatment section 1 is connected to the lower side surface of the water detection container 3 of the water quality measuring instrument 2 below the sensitive section 4. Further, as a flow path of water flowing out from the test water container 3, a lower outflow flow channel 11a and an upper outflow flow channel 11b are provided.
Is derived from. The lower outflow passage 11a is derived from the lower side surface of the test container 3 below the position where the sensitive portion 4 is arranged, and the downstream side thereof extends downward, and a solenoid valve is provided in the middle of the pipe. An on-off valve 8 configured by, for example, is provided. On the other hand, the upper outflow channel 11b is led out from the side surface of the sample container 3 above the connection position of the lower outflow channel 11a and above the arrangement position of the sensitive section 4, and the downstream side thereof extends downward. Has been issued. Although not shown, a control unit that controls the operation of the on-off valve 8 based on the detection result of the water flow detection unit 21 is also provided.

In the water treatment apparatus thus constructed, raw water is supplied from the inflow port during the water treatment operation, and the raw water flows through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment of the raw water in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5 and flows into the water detection container 3 of the water quality measuring instrument 2. At this time, the water flow detection unit 21 detects the flow of water, and when the water flow detection unit 21 inputs the detection result to the control unit, the control unit closes the open / close valve 8 and the water in the lower outflow passage 11a. Control to prevent distribution. The treated water flowing through the treated water channel 5 flows into the test water container 3 of the water quality measuring instrument 2, and the sensitive portion 4 of the holder body 18 is immersed in the treated water in the test water container 3 to measure the water quality. . Next, since the water flow is blocked in the lower outflow passage 11a as described above, the treated water flows into the test water container 3 only in the upper outflow passage 11b, and the upper outflow passage 11b.
It is sent to the outflow port through and is led out of the device.

When the water treatment operation is stopped by stopping the supply of water from the inflow port, the water level in the water channel of the apparatus reaches the position where the upper outflow channel 11b is arranged. The treated water does not flow out from the treatment unit 1 to the treated water channel 5, and the treated water stays in the treated water channel 5 and the treated water does not flow. At this time, the water flow detection unit 21 detects that water is not flowing, and when this detection result is input to the control unit, the control unit opens the open / close valve 8 and the water flow in the lower outflow passage 11a. Open up. Therefore, all the treated water in the test water container 3 is drained through the lower outflow channel 11a, and at this time, the treated water flows into the test water container 3 from the treated water channel 5, but the test water container 3 The connection position of the treated water channel 5 and the lower outflow channel 11a in the
Since it is below the liquid level, the liquid level in the test water container 3 is lowered and the sensitive part 4 is arranged above the liquid level. At this time, the sensitive part 4 is placed during the measurement of the water quality of the treated water. When bubbles are attached to, the relatively large bubbles are removed from the sensitive part 4 and discharged from the lower outflow passage 11a together with the treated water. In addition, the control unit opens the open / close valve 8 and after the fixed time required for the liquid level in the water sample container 3 to drop and the sensitive unit 4 to be arranged above the liquid level has passed, the open / close valve 8
Control to close again. At this time, the liquid level in the test water container 3 rises due to the water flowing in from the treated water flow path 5, and the sensitive portion 4 is immersed again in the treated water. At this time, small bubbles remain in the sensitive portion 4. If so, these bubbles are removed and diffuse into the treated water.

Therefore, every time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of the bubbles adhering to the sensitive portion 4.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

In the embodiment shown in FIG. 3, although not shown, the water treatment section 1 in which the raw water flow path 24 and the treated water flow path 5 are connected to each other is provided similarly to the one shown in FIG. 5
A water flow detection unit 21 is provided in the. In addition, the treated water flow path 5 derived from the water treatment unit 1 is the water detection container 3 of the water quality measuring device 2.
Is attached to the bottom side of. Further, a bypass channel 12 that bypasses the treated water channel 5 is connected to the treated water channel 5. The upstream side of the bypass channel 12 is the treated water channel 5.
It branches from and is extended to the side, then extended downward,
The downstream end is adapted to join the treated water channel 5. A storage part 9 made of a hollow container is provided in the middle of the bypass flow path 12, and the amount of water flowing downstream of the storage part 9 of the bypass flow path 12 is controlled on the downstream side of the storage part 9. A flow control device is provided. This flow rate control device has a function of switching between a state in which the flow of water is opened and a state in which the flow of water is blocked, and a function of adjusting the flow rate when water is flowed. It is composed of a valve 8, a pump, or a combination thereof. When the bypass flow path 12 extends downward on the downstream side of the storage section 9 as shown in the figure,
The flow rate control device can be configured by the open / close valve 8 or a combination of the open / close valve 8 and a pump. Further, a drainage flow path 6 is provided in the treated water flow path 5 so as to branch between the merged position with the downstream end of the bypass flow path 12 and the test water container 3. In the illustrated example, the bypass flow path 12 is provided. The drainage flow path 6 is provided so as to extend downward from a position where the drainage flow path 6 and the downstream side end portion thereof meet. An on-off valve 8 including an electromagnetic valve is provided in the middle of the drainage channel 6. In addition, water test container 3
From, the outflow passage 11 is led out from the side surface above the arrangement position of the sensitive portion 4, and the downstream side thereof extends downward. Although not shown, a control unit that controls the operations of the opening / closing valve 8 and the water flow adjusting device 13 based on the detection result of the water flow detecting unit 21 is also provided.

In the water treatment apparatus constructed as described above, raw water is supplied from the inflow port during the water treatment operation, and the raw water flows through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment of the raw water in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5 and flows into the water detection container 3 of the water quality measuring instrument 2. At this time, the water flow detection unit 21 detects the flow of water, and when the water flow detection unit 21 inputs the detection result to the control unit, the control unit closes the open / close valve 8 and the water flow in the drainage flow path 6. At the same time, the flow control device 13 controls the flow control device 13 to prevent the flow of water in the bypass flow passage 12 on the downstream side of the reservoir 9. The treated water flowing through the treated water flow path 5 flows into the test water container 3 of the water quality measuring instrument 2, and the sensitive portion 4 of the holder body 18 is immersed in the treated water in the test water container 3 to measure the water quality. After that, it is discharged from the outlet through the outflow passage 11 to the outside of the apparatus. A part of the treated water flowing through the treated water channel 5 flows into the bypass channel 12 and is stored in the storage section 9.

When the water treatment operation is stopped by stopping the water supply from the inflow port, the treated water does not flow out from the water treatment section 1 to the treated water channel 5, and the treated water is treated in the treated water channel 5. Water accumulates and treated water does not flow. At this time, the water flow detection unit 21 detects that water is not flowing, and when the detection result is input to the control unit, the control unit opens the on-off valve 8 to cause the water flow in the drainage flow path 6. Open. Therefore, the treated water in the test water container 3 flows back through the treated water flow path 5 and is drained from the drainage flow path 6, and the flow of the treated water is that the air flows into the test water container 3 from the outflow path 11. Reserved. For this reason, the liquid level in the test water container 3 is lowered and the sensitive part 4 is arranged above the liquid level. At this time, air bubbles are attached to the sensitive part 4 during the water quality measurement of the treated water. In this case, relatively large bubbles are removed from the sensitive section 4 and are discharged from the drainage channel 6 together with the treated water. Further, the control unit opens the on-off valve 8 again after a certain period of time that elapses from the time when the on-off valve 8 is opened to the time when the liquid level in the sample container 3 is lowered and the sensitive unit 4 is arranged above the liquid level. The control is performed so as to be closed, and the water flow adjusting device 13 is controlled to generate a water flow toward the downstream side on the downstream side of the storage section 9. At this time, the treated water in the reservoir 9 flows out to the downstream side of the bypass flow passage 12 and flows into the test water container 3 through the treated water flow path 5, whereby the liquid level in the test water container 3 rises. The sensitive part 4 is immersed again in the treated water,
At this time, if small bubbles remain in the sensitive section 4, the bubbles are removed and diffused into the treated water.

Therefore, every time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of the bubbles adhering to the sensitive portion 4 can be removed.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

In the embodiment shown in FIG. 4, although not shown, the water treatment section 1 in which the raw water flow path 24 and the treated water flow path 5 are connected is provided similarly to that shown in FIG. 5
A water flow detection unit 21 is provided in the. In addition, the treated water flow path 5 derived from the water treatment unit 1 is the water detection container 3 of the water quality measuring device 2.
Is attached to the bottom side of. Further, the outflow passage 11 is led out from the water detection container 3 from a side surface above the arrangement position of the sensitive portion 4, and the downstream side thereof is extended downward. The outflow passage 11 is provided with an opening / closing valve 8 including an electromagnetic valve that opens and closes the flow of liquid and gas in the outflow passage 11. Further, an air pump 14 for sending air into the test water container 3 is connected to the test water container 3. Although not shown, a control unit that controls the operations of the on-off valve 8 and the air pump 14 based on the detection result of the water flow detection unit 21 is also provided.

In the water treatment apparatus thus constructed, raw water is supplied from the inflow port during the water treatment operation, and the raw water circulates through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment of the raw water in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5 and flows into the water detection container 3 of the water quality measuring instrument 2. At this time, the water flow detecting unit 21 detects the flow of water, and when the water flow detecting unit 21 inputs the detection result to the control unit, the control unit opens the open / close valve 8 to flow the water in the outflow passage 11. Is controlled and the air pump 14 is controlled not to operate. The treated water flowing through the treated water flow path 5 flows into the test water container 3 of the water quality measuring instrument 2, and the sensitive portion 4 of the holder body 18 is immersed in the treated water in the test water container 3 to measure the water quality. After that, it flows out of the apparatus through the outflow passage 11 from the outflow port.

When the water treatment operation is stopped by stopping the water supply from the inflow port, the treated water does not flow out from the water treatment section 1 to the treated water channel 5, and the treated water is treated in the treated water channel 5. Water accumulates and treated water does not flow. At this time, the water flow detection unit 21 detects that water is not flowing, and when this detection result is input to the control unit, the control unit closes the open / close valve 8 and detects the flow of water and gas in the outflow passage 11. The flow is blocked, and the air pump 14 is operated to send out air into the test water container 3. Therefore, the treated water in the test water container 3 flows backward through the treated water flow path 5 due to the pressure of air. For this reason, the liquid level in the test water container 3 is lowered and the sensitive part 4 is arranged above the liquid level. At this time, air bubbles are attached to the sensitive part 4 during the water quality measurement of the treated water. If so, relatively large bubbles are removed from the sensitive section 4. In addition, the control unit closes the opening / closing valve 8 and operates the air pump 14, and then a certain time elapses until the liquid level in the test water container 3 is lowered and the sensitive unit 4 is arranged above the liquid level. After that, the operation of the air pump 14 is stopped and the opening / closing valve 8 is opened. At this time, the treated water flows into the reservoir 9 from the treated water flow path 5, whereby the liquid level in the test water container 3 rises and the sensitive portion 4 is immersed again in the treated water. When small bubbles remain in the portion 4, the bubbles are removed and diffused into the treated water.

Therefore, each time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of bubbles adhering to the sensitive portion 4.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

In the embodiment shown in FIG. 5, although not shown, the water treatment section 1 in which the raw water flow path 24 and the treated water flow path 5 are connected is provided similarly to that shown in FIG. 5
A water flow detection unit 21 is provided in the. In addition, the treated water flow path 5 derived from the water treatment unit 1 is the water detection container 3 of the water quality measuring device 2.
Is attached to the bottom side of. Further, the outflow passage 11 is led out from the water detection container 3 from a side surface above the arrangement position of the sensitive portion 4. Further, the water quality measuring device 2 is formed so as to be adjustable in the arrangement position in the vertical direction by supporting the housing of the water treatment device so as to be movable in the vertical direction by a linear rail or the like. Further, in the case shown in FIG.
The operation lever 15 is connected to the water quality measuring instrument 2, and the vertical position of the water quality measuring instrument 2 can be adjusted by manually operating the operation lever 15, as shown in FIG. ), The upper end of the vertical shaft 16 is connected to the lower end of the water quality measuring device 2, and a drive source 17 such as a motor for driving the shaft 16 in the vertical direction is connected. The vertical position of the water quality measuring instrument 2 can be adjusted by driving the vertical direction. Although not shown, the water flow detection unit 21 is not shown in FIG.
There is also provided a control unit that controls the operation of the drive source 17 such as a motor based on the detection result of. Further, the treated water channel 5 and the outflow channel 11 are made of a flexible material, at least a part of which is deformable. Therefore, the treated water channel 5 and the outflow channel 11 are deformed so that the treated water channel 5 and the outflow channel 11 are deformed. The vertical movement of the water quality measuring device 2 is ensured in a state where the outflow passage 11 is connected to the water sample container 3. The treated water channel 5 and the outflow channel 11 are
For example, it is configured by a duct which is made of a bellows-shaped resin material and which can be expanded and contracted.

In the water treatment apparatus constructed as described above, raw water is supplied from the inflow port during the water treatment operation, and the raw water flows through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment of the raw water in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5 and flows into the water detection container 3 of the water quality measuring instrument 2. At this time, in the case shown in FIG. 5 (a), by operating the operation lever 15 in advance, the connection position of the outflow passage 11 in the test container 3 is the liquid surface of the water in the passage on the upstream side of the water quality measuring device 2. Water quality measuring device 2 so that it is arranged below
5B is adjusted in advance, and in the apparatus shown in FIG. 5B, the water flow detector 21 detects the flow of water, and the water flow detector 21 detects the detection result. Is input to the control unit, the control unit drives the shaft 16 by the drive source 17 so that the connection position of the outflow passage 11 in the test water container 3 is higher than that of the water quality measuring instrument 2. Water quality measuring device 2 so that it is arranged below the surface
Performs control to adjust the vertical arrangement position of the. The treated water flowing through the treated water flow path 5 flows into the water measuring container 3 of the water quality measuring device 2, and in the water measuring container 3, the sensitive portion 4 of the holder body 18 is provided.
Is immersed in treated water and water quality is measured,
It flows out of the apparatus through the outflow passage 11 from the outflow port.

When the water treatment operation is stopped by stopping the water supply from the inflow port, the treated water does not flow out from the water treatment section 1 to the treated water channel 5, and the treated water is treated in the treated water channel 5. Water accumulates and treated water does not flow. At this time,
In the structure shown in FIG. 5 (a), the connection position between the test water container 3 and the treated water flow path 5 is moved from the water quality measuring device 2 by manually operating the operation lever 15 to move the water quality measuring device 2 upward. Also adjusts the arrangement position of the water quality measuring device 2 so as to be arranged above the water surface of the water on the upstream side, and in the one shown in FIG. When the detection result is input to the control unit, the control unit drives the shaft 16 by the drive source 17 to move the water quality measuring device 2 upward, and thereby the water detection container is detected. Control is performed to adjust the arrangement position of the water quality measuring device 2 so that the connection position between the water treatment device 3 and the treated water flow passage 5 is arranged above the water surface in the flow passage on the upstream side of the water quality measuring device 2. For this reason, the treated water in the test water container 3 flows backward through the treated water flow path 5, and the liquid level in the test water container 3 is lowered to cause the sensitive portion 4 to move.
Is to be placed above the liquid level,
As for the flow of this treated water, the air from the outflow passage 11 is the water detecting container 3
It is secured by flowing in. At this time, if bubbles are attached to the sensitive section 4 during the measurement of the quality of the treated water, relatively large bubbles are removed from the sensitive section 4. In addition, FIG.
In the case shown in, the liquid level in the test water container 3 is lowered and the sensitive portion 4
After the water is placed above the liquid surface, the water quality measuring instrument 2 is moved downward by manually operating the operation lever 15, so that the connection position between the water sample container 3 and the outflow passage 11 is the water quality measuring instrument. The position of the water quality measuring device 2 is adjusted so that the water quality measuring device 2 is arranged below the water surface in the flow path on the upstream side of the water quality measuring device 2. Also, in the case shown in FIG. After the above is moved upward as described above, the liquid level in the sample container 3 is lowered, and after a certain period of time required until the sensitive section 4 is arranged above the liquid level, the shaft 16 is driven by the drive source. The water quality measuring instrument is driven by 17 so that the connection position of the outflow passage 11 in the water sampling container 3 is arranged below the liquid level of water in the passage on the upstream side of the water quality measuring instrument 2. Control for adjusting the arrangement position of 2 in the vertical direction is performed. At this time, the treated water flows into the test water container 3 from the treated water flow path 5, whereby the liquid level in the test water container 3 rises and the sensitive portion 4 is exposed.
Is again immersed in the treated water. At this time, if small bubbles remain in the sensitive section 4, the bubbles are removed and diffused into the treated water.

Therefore, each time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of bubbles adhering to the sensitive portion 4.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

In the embodiment shown in FIG. 6, although not shown, the water treatment section 1 in which the raw water flow path 24 and the treated water flow path 5 are connected is provided similarly to that shown in FIG. 5
A water flow detection unit 21 is provided in the. In addition, the treated water flow path 5 derived from the water treatment unit 1 is the water detection container 3 of the water quality measuring device 2.
Is attached to the bottom side of. Further, the outflow passage 11 is led out from the water detection container 3 from the side surface above the connection position with the treated water passage 5. Further, the test container 3 is provided with a vent hole 19 on the side surface above the watertight material 25. Further, the holder body 18 of the water quality measuring device 2 is supported by the linear movement rail or the like so as to be movable in the vertical direction with respect to the test water container 3, so that the lower end of the holder body 18 is arranged below the watertight material 25. A state in which the holder body 18 and the inner side surface of the test water container 3 are watertight with the watertight material 25, and the sensitive portion 4 is arranged below the connection position between the test water container 3 and the outflow passage 11. The holder body 18 is arranged above this, the lower end of the housing 23 of the holder body 18 is arranged above the watertight material 25 and the vent hole 19, and the sensitive portion 4 is connected to the water sample container 3 and the outflow passage 11. The arrangement position in the up-and-down direction with respect to the sample container 3 is adjustable so that the arrangement position is higher than the connection position. In the structure shown in FIG. 6A, the upper end of the holder body 18 is connected to the upper end of the shaft 16 in the vertical direction, and the drive source 17 such as a motor for driving the shaft 16 in the vertical direction is connected. By driving the shaft 16 with the drive source 17 in the vertical direction, the holder body 18 is moved up or down to adjust the position of the holder body 18 in the vertical direction with respect to the sample container 3. In the structure shown in b), an electromagnet 20a is provided on the upper end of the holder body 18, and another electromagnet 20b is provided above the electromagnet 20a for the housing of the water treatment device.
By adjusting the electric power supplied to a and 20b, an attractive force or a repulsive force is generated between the electromagnets 20a and 20b, whereby the vertical arrangement position of the holder body 18 can be adjusted. Although not shown, FIG. 6 (a)
The one shown in FIG. 6 is also provided with a control unit for controlling the operation of the drive source 17 such as a motor based on the detection result of the water flow detecting unit 21, and the one shown in FIG. A control unit for controlling the electric power supplied to the electromagnets 20a and 20b based on the above is also provided.

In the water treatment apparatus constructed as described above, raw water is supplied from the inflow port during the water treatment operation, and the raw water flows through the raw water flow path 24 and is supplied to the water treatment section 1 to perform a predetermined treatment. To be done. The treated water generated by the treatment of the raw water in the water treatment unit 1 is led out of the water treatment unit 1 through the treated water flow path 5 and flows into the water detection container 3 of the water quality measuring instrument 2. At this time, the water flow detecting unit 21 detects the flow of water, and when the water flow detecting unit 21 inputs the detection result to the control unit, the control unit drives the shaft 16 as a drive source in the one shown in FIG. 6 (b), the control unit adjusts the supply of electric power to the electromagnets 20a and 20b so that the lower end of the holder body 18 is disposed below the watertight material 25. Holder body 1 such that watertightness is secured between 18 and the inner peripheral surface of water sample container 3 and ventilation port 19 is closed on the side surface of holder body 18.
Control for adjusting the arrangement position of 8 in the vertical direction is performed. The treated water flowing through the treated water flow path 5 flows into the test water container 3 of the water quality measuring instrument 2, and the sensitive portion 4 of the holder body 18 is immersed in the treated water in the test water container 3 to measure the water quality. After that, it flows out of the apparatus through the outflow passage 11 from the outflow port.

When stopping the water treatment operation by stopping the supply of water from the inlet, the treated water does not flow out from the water treatment section 1 to the treated water channel 5, and the treated water is treated in the treated water channel 5. Water accumulates and treated water does not flow. At this time,
When the water flow detection unit 21 detects that water is not flowing and the detection result is input to the control unit,
In the structure shown in (a), the control unit uses the shaft 16 as the driving source 1.
7 and, in the case shown in FIG. 6 (b), the controller adjusts the electric power supplied to the electromagnets 20a and 20b to move the holder body 18 upward with respect to the test water container 3. Of the holder body 18 so that the lower end of the holder body 18 is arranged above the watertight material 25 and the vent hole 19 and the sensitive portion 4 is arranged above the connection position between the water sample container 3 and the outflow container. The control for adjusting the arrangement position with respect to the test water container 3 is performed. Therefore, the sensitive portion 4 is arranged above the liquid level in the water sample container 3,
At this time, since the air flows into the test water container 3 from the ventilation port 19, the liquid surface does not reach above the connection position between the test water container 3 and the outflow passage 11, and the sensitive portion 4 is securely provided. Is located above the liquid level. At this time, if bubbles are attached to the sensitive section 4 during the measurement of the quality of the treated water, relatively large bubbles are removed from the sensitive section 4. Further, the control unit moves the holder body 18 upward as described above, and then drives the shaft 16 by the drive source 17 in the case shown in FIG. 6A, and the electromagnet 20a in the case shown in FIG. 6B. , 20
The lower end of the holder body 18 is arranged below the watertight material 25 so that the holder body 18 and the inner side surface of the sample container 3 are watertightly sealed by the watertight material 25 and the sensitive portion is controlled by controlling the electric power supplied to b. Control for adjusting the arrangement position of the holder body 18 is performed so that 4 is arranged below the connection position between the test water container 3 and the outflow passage 11. At this time, the sensitive section 4 is immersed in the treated water in the test water container 3, and at this time, the sensitive section 4
If small air bubbles remain, the air bubbles are removed and diffuse into the treated water.

Therefore, each time the water treatment operation is stopped, the air bubbles can be completely removed from the sensitive portion 4 of the water quality measuring instrument 2, and the water quality measuring instrument 2 due to the growth of bubbles adhering to the sensitive portion 4 can be removed.
It is possible to prevent the abnormal output from occurring in the water and to accurately measure the water quality.

[0049]

As described above, the water treatment apparatus according to the first aspect of the present invention includes a flow passage extending from the inflow port to the outflow port, a water treatment unit for treating raw water flowing through the flow passage, and a water treatment unit. In a water treatment device comprising a water quality measuring device for measuring the water quality of the water after the treatment by the treatment part, the water quality measuring device is a sensing container to which the treated water is supplied and a sensitive part which is in direct contact with the water during the water quality measurement. And when the water treatment operation of the water treatment section is stopped, the sensitive section is switched from the state in which the sensitive section is in contact with the water in the test container to the state in which the sensitive section is not in contact with the water, and then the sensitive section. Since it is equipped with a switching mechanism that switches to the state in which the water is in contact with the water in the test water container, when the water treatment operation in the water treatment unit is stopped, the sensitive unit is first set to the state not in contact with water. If bubbles are attached to the Small bubbles can be removed by bringing the sensitive part into contact with water.Every time the water treatment operation is stopped, the bubbles on the surface of the sensitive part are removed to suppress the occurrence of abnormal output in the water quality measuring device and The water quality can be accurately measured.

According to the invention of claim 2, in claim 1, the downstream side of the treated water channel through which the water after treatment by the water treatment section flows is a drain channel and a supply channel having a diameter smaller than that of the drain channel. Switching mechanism by branching, providing an opening / closing valve in the drainage flow path, connecting the downstream side of the supply flow path to a storage part that stores the treated water, and connecting the storage part and the water detection container with a connection pipe Therefore, when the water treatment operation is stopped, the on-off valve is opened to release the flow of water in the drainage flow passage, and the water retained in the treated water flow passage has a diameter larger than that of the supply flow passage. In addition to preferentially flowing into the drainage flow path, the aspiration effect causes the water to flow back in the supply pipe to cause the water in the storage part to flow into the drainage flow path, and accordingly the water in the test water container to flow back in the connection pipe. It is possible to let it flow into the storage part and make sure that the sensitive part does not come into contact with water. Then, the on-off valve is closed again, the water in the reservoir is caused to flow into the test container through the connection flow path, and the sensitive part is brought into contact with water by immersing the sensitive part in water again. .

According to a third aspect of the present invention, in the first aspect, the downstream side of the treated water flow path through which the water treated by the water treatment section flows is connected to the lower portion of the test water container and flows out from the water test container. As a water flow path, a lower outflow passage is connected to the lower part of the water detection container, an upper outflow passage is connected to the water detection container above the lower outflow passage, and an opening / closing valve is provided in the lower outflow passage. Since the switching mechanism is configured by this, when the water treatment operation is stopped, the on-off valve is opened to open the flow of water in the lower outflow passage, and the water in the test container is drained through the lower outflow passage. , The sensitive part can be brought into contact with water, and then the on-off valve is closed again to allow water to flow from the treated water flow path into the test water container to immerse the sensitive part in water, thereby contacting the sensitive part with water. It can be done.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a bypass flow passage is provided in which the downstream side of the treated water passage through which the water treated by the water treatment section circulates is connected to the test water container and bypasses the treated water passage. In addition to the provision of a storage part for storing the water after treatment and a water flow adjusting device for controlling the flow of water on the downstream side of the storage part in the middle of the piping of the bypass flow path, the downstream end of the bypass flow path and the treated water flow. A drainage flow path is provided by branching from the treated water flow path between the junction with the path and the test water container,
Since the switching mechanism is configured by providing an opening / closing valve in the drainage flow path, when the water treatment operation is stopped, the opening / closing valve is opened to open the flow of water in the drainage flow path and treat the water in the test water container. The water flow path can be reversed so that the sensitive part does not come into contact with water by draining it from the drainage flow path. By generating a flowing water flow and causing the water in the storage part to flow into the test solution from the bypass flow path through the treated water flow path, the sensitive part can be immersed in water to bring the sensitive part into contact with water.

According to a fifth aspect of the present invention, in the first aspect, the downstream side of the treated water flow path through which the water treated by the water treatment section circulates is connected to a test water container, and the test water container is connected to the inside of the test water container. The switching mechanism is configured by connecting the outflow passage through which the outflowing water flows, providing an on-off valve in the outflow passage, and providing an air pump for sending air into the water detection container in the water detection container, so that the water treatment is performed. When the operation is stopped, the on-off valve is closed to prevent the flow of water and gas in the outflow passage, and the air pump is operated to send the air into the water detection container to remove the water in the water detection container. The pressure of the air causes the treated water flow path to flow back so that the sensitive part does not come into contact with water. Then, the air pump is stopped and the on-off valve is opened to allow water to flow from the treated water flow path into the storage part. The sensitive part The sensitive part is immersed in which can be contacted with water during.

According to a sixth aspect of the present invention, in the first aspect, the downstream side of the treated water flow path through which the water treated by the water treatment section flows is connected to a test water container, and the test water container is connected to the inside of the test water container. To connect the outflow channel through which the outflowing water flows, to form the treated water channel and the outflow channel with a deformable flexible material, and to adjust the vertical position of the water quality measuring device. Since the switching means is configured by, when the water treatment operation is stopped, by moving the arrangement position of the water quality measuring device upward to cause the water in the test water container to flow back through the treated water channel,
The sensitive part can be kept out of contact with water, and then the position of the water quality measuring device is moved downward and the sensitive part is immersed in water by allowing water to flow from the treated water channel into the test water container. The sensitive part can be brought into contact with water.

According to the invention of claim 7, in claim 6, since an operating lever for manually adjusting the vertical arrangement position of the water quality measuring device is provided, the vertical arrangement position of the water quality measuring device is manually provided. Can be adjusted.

According to the eighth aspect of the present invention, in the sixth aspect, since the shaft is connected to the water quality measuring device and a drive source for driving the shaft in the vertical direction is provided, the water quality measuring device is arranged in the vertical direction by automatic control. The position can be adjusted.

According to a ninth aspect of the present invention, in the first aspect, the holder body for holding the sensitive section is provided so as to be movable up and down with respect to the test vessel with the sensitive section being disposed in the test vessel. By forming a water quality measuring device and providing a ventilation hole that is closed when the holder body moves downward and is opened when the holder body moves upward in the test water container, a switching mechanism is configured, so that water treatment is performed. When the operation is stopped, move the holder body upwards with respect to the test water container and let air flow into the test water container through the ventilation hole so that the sensitive part is in the test water container above the liquid level of water. By placing it above,
It is possible to make the sensitive part in contact with water, and then move the holder body downward with respect to the test water container to immerse the sensitive part in the test water container to bring the sensitive part into contact with water. It can be done.

According to a tenth aspect of the present invention, in the ninth aspect, the holder body is provided with an electromagnet, and another electromagnet is provided above or below the electromagnet to control the electric power supplied to each electromagnet. Since the arrangement position of the holder in the vertical direction is adjustable, the holder body can be moved in the vertical direction by the attractive force or repulsive force between the electromagnets.

According to the eleventh aspect of the present invention, in the ninth aspect, the shaft is connected to the holder body and the drive source for driving the shaft in the vertical direction is provided. Therefore, the shaft is driven in the vertical direction by the drive source to hold the holder. The body can be moved up and down.

The twelfth aspect of the present invention provides the first aspect.
In any one of 1 above, since a water passage detection unit that detects the presence or absence of water flow in this passage is provided in the flow passage from the inflow port to the outflow port, water passage will not be detected by the water passage detection unit. In this case, by operating the switching mechanism, it is possible to automatically remove bubbles from the surface of the sensitive part when the water treatment operation is stopped.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of an embodiment of the present invention.

FIG. 2 is a schematic view showing another example of the embodiment of the present invention.

FIG. 3 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 4 is a schematic diagram showing still another example of the embodiment of the present invention.

5A is a schematic view showing another example of the embodiment of the present invention, and FIG. 5B is a schematic view showing still another example.

6A is a schematic view showing another example of the embodiment of the present invention, and FIG. 6B is a schematic view showing still another example.

[Explanation of symbols]

1 Water treatment department 2 Water quality measuring instrument 3 Water detection container 4 Sensitive section 5 treated water flow path 6 drainage channels 7 supply channels 8 on-off valve 9 Reservoir 10 Connection tube 11 Outflow channel 11a Lower outflow channel 11b Upper outflow channel 12 Bypass channel 13 Flow control device 14 Air pump 15 Operation lever 16 shafts 17 Drive source 18 Holder body 19 Vent 20a electromagnet 20b electromagnet 21 Water flow detector

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[Procedure amendment]

[Submission date] December 3, 2001 (2001.12.
3)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/68 540 C02F 1/68 540E 540Z G01N 27/28 321 G01N 27/28 321Z // G01N 27/08 27/08 27/36 27/36 Z 27/416 27/46 353 Z 351 F term (reference) 2G060 AA05 AC02 AE17 AE18 AF08 FB06 FB07 KA06 4D061 DA03 DB20 EA02 EB04 EB37 GA05 GA06 GA07

Claims (12)

[Claims] 1. A flow path from an inflow port to an outflow port, a water treatment unit for treating raw water flowing through the flow passage, and a water quality measuring device for measuring the quality of water after treatment by the water treatment unit. In the water treatment device provided, in the case where the water quality measuring instrument includes a test water container to which the water after treatment is supplied and a sensitive section which comes into direct contact with water at the time of water quality measurement, and when the water treatment operation in the water treatment section is stopped. Switching from the state where the sensitive part is in contact with the water in the test container to the state where the sensitive part is not in contact with water, and then the state where the sensitive part is in contact with the water in the test container A water treatment device comprising a mechanism. 2. A downstream side of a treated water channel through which water after treatment by a water treatment section flows is branched into a drain channel and a supply channel having a diameter smaller than that of the drain channel, and an opening / closing valve is provided in the drain channel. The switching mechanism is configured by connecting the downstream side of the supply flow path to a storage unit that stores the treated water, and connecting the storage unit and the water detection container with a connection pipe. Item 1. The water treatment device according to item 1. 3. The lower part of the test water container is connected to the lower part of the test water container on the downstream side of the treated water flow path through which the water after the treatment by the water treatment part flows, as a flow path of water flowing out from the test water container. A switching mechanism is configured by connecting the lower outflow passage to the lower outflow passage, connecting the upper outflow passage to the water detection container above the lower outflow passage, and providing an opening / closing valve in the lower outflow passage. The water treatment apparatus according to claim 1, wherein the water treatment apparatus is a water treatment apparatus. 4. A bypass channel for bypassing the treated water channel is provided by connecting a downstream side of the treated water channel, through which the water after treatment by the water treatment section flows, to a test water container, and treating the pipe in the bypass channel midway. Provide a water flow adjusting device that controls the flow of water on the downstream side of the storage part and the storage part that stores the latter water, and the confluence point of the downstream side end part of the bypass flow path and the treated water flow path and the water detection container The water treatment apparatus according to claim 1, wherein a drainage flow path is branched from the treated water flow path, and an opening / closing valve is provided in the drainage flow path to constitute a switching mechanism. 5. A downstream side of a treated water flow path through which water after treatment by a water treatment section flows is connected to a test water container, and an outflow flow path through which water flowing out of the test water container flows is connected to the test water container. The water treatment apparatus according to claim 1, wherein the switching mechanism is configured by providing an open / close valve in the outflow passage and an air pump for sending air into the test water container in the test water container. apparatus. 6. A downstream side of a treated water flow path through which water after treatment by a water treatment section flows is connected to a test water container, and an outflow flow path through which water flowing out of the test water container flows is connected to the test water container. However, the switching means is configured by forming the treated water flow path and the outflow flow path with a deformable flexible material and by adjusting the vertical arrangement position of the water quality measuring device. The water treatment device according to claim 1. 7. The water treatment device according to claim 6, further comprising an operation lever for manually adjusting the vertical arrangement position of the water quality measuring device. 8. The water treatment device according to claim 6, further comprising a drive source for connecting the shaft to the water quality measuring device and driving the shaft in the vertical direction. 9. A water quality measuring instrument is formed by providing a holder body for holding the sensitive part up and down with respect to the test container with the sensitive part being arranged in the test container. The water treatment system according to claim 1, wherein the switching mechanism is configured by providing a vent hole that is closed when the holder body moves downward and is opened when the holder body moves upward. apparatus. 10. A holder body is provided with an electromagnet, and another electromagnet is provided above or below this electromagnet, and the arrangement position in the vertical direction of the holder body is adjustable by controlling the electric power supplied to each electromagnet. The water treatment device according to claim 9, wherein the water treatment device is formed by: 11. The water treatment device according to claim 9, wherein a shaft is connected to the holder body, and a drive source for driving the shaft in the vertical direction is provided. 12. The flow passage from the inflow port to the outflow port is provided with a water flow detection unit for detecting the presence or absence of water flow in the flow line. The described water treatment device.