JP2006161791A - Water level control device for plumbing tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water level control device for a plumbing tank capable of preventing accidents due to abnormality in a circuit inside a water level detecting device in advance. <P>SOLUTION: The water level control device is equipped with the water level detecting device 34 for outputting a water level detection signal when the water level in a reservoir 14 for storing water inside is higher than a predetermined water level, and a control part 22 for controlling the water level of the reservoir 14 based on the water detection signal for the plurality of water levels from the water level detecting device 34. The control part 22 outputs a detecting device abnormality alarm to the outside if combinations concerning the presence or absence of the water level detecting signals for the plurality of the water levels from the water detecting device 34 are not compatible. For example, if a water level detecting signal for drought water level L<SB>1</SB>is not output from an electrode rod 341 even though a water level detecting signal for a predetermined returned water level L<SB>3</SB>with which a pump 16 can be started is output from an electrode rod 343, a detecting device abnormality alarm is output to the outside. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water level control device for a water supply / drainage tank. The present invention relates to a water level control device for a water supply / drainage tank that controls the discharge of water.

  For example, tap water is temporarily stored in a water receiving tank installed upstream of the water supply apparatus, and the water stored in the water receiving tank is supplied to each consumer by a pump of the water supply apparatus. In this case, a water level control device is provided that detects the water level in the water receiving tank with a water level detector, and controls the supply of tap water to the water receiving tank and the operation of the pump that pumps water from the water receiving tank according to the detected water level. It is done. When the water level in the water receiving tank exceeds a predetermined limit, an alarm is issued from the water level control device.

  In such a water level control device, a water level detector that detects the water level of the water receiving tank stepwise by using a plurality of electrode rods and a plurality of float switches is used. However, the wiring in the water level detector may be connected by mistake, or the circuit in the water level detector may be damaged by a surge caused by a lightning strike to the water receiving tank. In such a case, for example, there is an accident in which a detection signal of a high water level is erroneously input in spite of actually being in a drought state, and the pump of the water supply device is operated in the drought state. there is a possibility. Such a problem also occurs in the water level control device for the elevated water tank and the drain tank.

  The present invention has been made in view of such problems of the prior art, and provides a water level control device for a water supply / drainage tank that can prevent an accident caused by a circuit abnormality in a water level detector. With the goal.

  According to one aspect of the present invention, there is provided a water level control device for a water supply / drainage tank that can prevent an accident caused by an abnormality of a circuit in a water level detector. This water level control device is based on a water level detector that outputs a water level detection signal when the water level of a tank that stores water therein is higher than a predetermined water level, and a water level detection signal for a plurality of water levels from the water level detector. And a control unit for controlling the water level of the water tank. The controller outputs a detector abnormality alarm to the outside when there is an incompatible combination regarding the presence or absence of water level detection signals for a plurality of water levels from the water level detector.

  The said water tank can be comprised with the water receiving tank connected to the pump which supplies water to a water supply terminal. In this case, the incompatible combination is (1) a combination of the absence of a water level detection signal for a predetermined drought level and the presence of a water level detection signal for a predetermined full water level, and (2) restarting of the pump. A combination of the presence of a water level detection signal for a predetermined return water level and the absence of a water level detection signal for the drought level, (3) the absence of a water level detection signal for a predetermined water reduction level, and water to the water receiving tank. Combination with the presence of a water level detection signal for a predetermined valve closing water level that closes the solenoid valve that controls the supply of water, and (4) the presence of a water level detection signal for the full water level, A combination of the absence of a detection signal, (5) the combination of the presence of a water level detection signal for the full water level and the absence of a water level detection signal for the valve closing water level. Combined, and (6) and that there is a water level detection signal for the full water level, it may be at least one of a combination of the lack of water level detection signal for the down level.

  The said water tank can be comprised with the elevated water tank which stores the water pumped up by the pump. In this case, the incompatible combination includes (1) a combination of the absence of a water level detection signal for a predetermined reduced water level and the presence of a water level detection signal for a predetermined full water level, and (2) a water level for the reduced water level. It can be at least one of a combination of the absence of a detection signal and the presence of a water level detection signal for a predetermined operating water level at which the operation of the pump starts.

  The said water tank can be comprised with the drain tank which has a pump which stores waste_water | drain and discharges this waste_water | drain outside. In this case, the incompatible combination is (1) a combination of the absence of a water level detection signal for a predetermined low water level and the presence of a water level detection signal for a predetermined full water level, and (2) water level detection for the full water level. The combination of the presence of a signal and the absence of a water level detection signal for a predetermined stop water level that stops the operation of the pump, and (3) the absence of a water level detection signal for the reduced water level and the detection of the water level for the stop water level It can be at least one of a combination with the presence of a signal.

  ADVANTAGE OF THE INVENTION According to this invention, the accident resulting from the abnormality of the circuit in a water level detector can be prevented beforehand.

  Hereinafter, embodiments of a water supply device and a drainage device using a water level control device according to the present invention will be described in detail with reference to FIGS. 1 to 6. 1 to 6, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic diagram showing a water supply apparatus 10 using a water level control apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the water supply device 10 includes a pump 16 connected to the water receiving tank 14 via the suction pipe 12, a motor 18 that drives the pump 16, an inverter 20 that controls the rotation speed of the motor 18, And a control unit 22 that controls various devices including the inverter 20. A discharge pipe 24 on the discharge side of the water supply apparatus 10 is connected to a water supply pipe 28 that extends to a water supply terminal 26 of a consumer in a building such as a building or a condominium. These water supply ends 26 are, for example, a water heater or a water tap provided in each of the branched water supply pipes 28.

  Tap water is introduced into the water receiving tank 14 from a water supply pipe 30 connected to a water main (not shown), and the water supply pipe 30 controls the supply of water to the water receiving tank 14. An electromagnetic valve 32 is provided. Thus, the tap water is once stored in the water receiving tank 14, and the stored water is supplied to the water supply terminal 26 of the consumer by the water supply device 10.

  Further, the water receiving tank 14 is provided with a water level detector 34 for detecting the internal water level. The water level detector 34 is connected to the control unit 22 of the water supply apparatus 10, and the operation of the pump 16 and the operation of the electromagnetic valve 32 are controlled by an output signal from the water level detector 34. In other words, the water level control device that detects the water level of the water receiving tank 14 and controls the water supply from the tap water to the water receiving tank 14 and the operation of the pump 16 that pumps water from the water receiving tank 14 according to the detected water level. 34 and the control part 22 of the water supply apparatus 10 are comprised. A pressure detector (not shown) is installed in the discharge pipe 24 of the pump 16, and the control unit 22 sends a rotation speed signal to the inverter 20 based on the pressure detected by the pressure detector. Feed, constant discharge pressure control for controlling the rotational speed of the pump 16 so that the discharge pressure of the pump 16 is constant, and sequentially calculating a target value of the discharge pressure of the pump 16 so that the terminal pressure of the pipe is constant, Estimated terminal pressure constant control is performed to control the rotational speed of the pump 16 so that the discharge pressure of the pump 16 matches the target value.

  The water level detector 34 in the present embodiment is configured to detect the water level of the water receiving tank 14 step by step with a plurality of electrode rods. In the example shown in FIG. 1, the water level detector 34 includes seven electrode rods 340 to 346 of different lengths, and six electrode level levels (full water level, valve closing water level, (Water reduction level, return water level, valve opening water level, drought level).

  Of the electrode rods 340 to 346, the longest electrode rod 340 is a ground electrode rod, and the other electrode rods 341 to 346 are electrode rods set to a length corresponding to the water level to be detected. In the example shown in FIG. 1, in order from the longest, an electrode rod 341 that detects a drought level, an electrode rod 342 that detects a valve opening water level, an electrode rod 343 that detects a return water level, an electrode rod 344 that detects a water reduction level, An electrode rod 345 for detecting the valve water level and an electrode rod 346 for detecting the full water level are provided.

  In such a water level detector 34, the water level is higher than the lower ends of the electrode rods 341 to 346 by detecting a change in resistance value between the electrode rods 341 to 346 and the longest ground electrode rod 340. The position is detected. That is, when the water level in the water receiving tank 14 is higher than the lower ends of the electrode rods 341 to 346 and the electrode rods 341 to 346 and the ground electrode rod 340 are electrically connected by water, the water level detector 34 detects the water level detection signal. Is output to the control unit 22.

FIG. 2 is a conceptual diagram showing the relationship between the electrode levels 341 to 346 of the water level detector 34 of FIG. 1 and the water level. The drought level L ₁ is a water level that issues a drought warning when it becomes lower than the water level, and is detected by the electrode rod 341. That is, when the water level becomes lower than the drought level L ₁ , the water level detection signal is not output from the electrode rod 341 to the control unit 22, but when the water level detection signal from the electrode rod 341 disappears, the control unit 22 It determines that falls below L _1, issues a drought warning to the outside, to stop the pump 16 in order to prevent dry running of the pump 16.

Opening the water level L _2, when the lower than the water level is a water level begins to introduce tap water water tank 14 by opening the solenoid valve 32, it is detected by the electrode rod 342. That is, when the water level is lower than the valve opening level L _2, although the water level detection signal to the controller 22 from the electrode rod 342 is not output, the control unit 22, the water level is opened when the water level detection signal from the electrode rod 342 is eliminated determines that below the valve level L _2, by opening the solenoid valve 32 to introduce tap water receiving tank 14. There are cases where there is no solenoid valve itself, and a ball tap or a motorized valve can be used instead of the solenoid valve.

The return water level L ₃ is a water level at which the pump 16 can be restarted when the water level becomes equal to or higher than the water level, and is detected by the electrode rod 343. That is, when the water level is restored water level L ₃ above, the water level detection signal to the controller 22 from the electrode rod 343 is output, the control unit 22 receives a level detection signal from the electrode rod 343 when the water level is restored level L ₃ is determined to have exceeded the set to allow restart pump 16 are stopped and become less empty water level L _1.

Water reducing position L ₄ represents a level which emits water reducing alarm to be lower than the water level is detected by the electrode rod 344. That is, when the water level is lower than the reduced water level L ₄ , the water level detection signal is not output from the electrode rod 344 to the control unit 22, but when the water level detection signal from the electrode rod 344 disappears, the control unit 22 decreases the water level. it is determined that falls below the L _4, emits a water-reducing alarm to the outside.

The closed water level L ₅ is a water level that closes the electromagnetic valve 32 and stops the supply of tap water to the water receiving tank 14 when the water level is higher than the water level, and is detected by the electrode rod 345. That is, when the water level is in a closed water level L ₅ above, the water level detection signal to the controller 22 from the electrode rod 345 is output, the control unit 22, the water level closed when receiving the level detection signal from the electrode rod 345 It determines that exceeds the level L _5, to stop the supply of tap water to close the solenoid valve 32.

The full water level L ₆ is a water level that issues a full water alarm when the water level is higher than the water level, and is detected by the electrode rod 346. That is, when the water level is full level L ₆ above, although the water level detection signal to the controller 22 from the electrode rod 346 is output, the control unit 22, the water level when receiving the level detection signal from the electrode rod 346 is full water level L _It is judged that ₆ has been exceeded, and a full water warning is issued outside.

Here, for example, consider the case where the water level of the water tank 14 is between the water-reducing position L ₄ and closing the water level L _5. When the water level of the water receiving tank 14 by the operation of the pump 16 of the water supply device 10 is below the water-reducing position L _4, the control unit 22 issues a water reducing alarm to the outside. Furthermore the water level is low, below the opening level L _2, tap water is started to be introduced to the electromagnetic valve 32 is opened water tank 14. If this still water level tap water is introduced below the empty water level L ₁ becomes low, as, drought warning is issued, the operation of the pump 16 is stopped. In this case, then the water level exceeds the return water level L ₃ increases, the pump 16 is set to enable starting state.

Tap water is introduced water level rises in water receiving tank 14, exceeds the closing level L _5, supply to the water tank 14 of the tap water solenoid valve 32 is closed is stopped. If this is also the solenoid valve 32 is closed Note water level exceeds the full water level L ₆ elevated as, full level alarm is issued.

  Here, in this embodiment, the control unit 22 always determines whether or not there is an incompatible combination regarding the presence or absence of the water level detection signals from the electrode rods 341 to 346, and there is an incompatible combination. In this case, a detector abnormality alarm is output to the outside because the water level detector 34 is abnormal.

For example, when there is no water level detection signal from the electrode rod 341, there cannot be a water level detection signal from the electrode rod 346. In other words, despite the water without the water level detection signal from the electrode rod 341 is lower than the empty water level L _1, the water level there is the water level detection signal from the electrode rod 346 is at full level L ₆ or more It is unlikely that the circuit in the water level detector 34 has failed for some reason. In such a case, the control unit 22 issues a detector abnormality alarm to the outside. When the control unit 22 issues a detector abnormality alarm to the outside, the operation of the pump 16 may be continued as it is or may be stopped.

Similarly, there is no water level detection signal from the electrode bar 341 and the water level is lower than the drought level L ₁ even though there is a water level detection signal from the electrode bar 343 and the water level is equal to or higher than the return water level L _3. In this case, there is no water level detection signal from the electrode rod 344 and the water level is lower than the reduced water level L _4, but there is a water level detection signal from the electrode rod 345 and the water level is the valve closed water level L _5. If that is not less than, despite water has water level detection signal from the electrode rod 346 is to be the full water level L ₆ or more, the water level detection signal level without opening from the electrode rod 342 If that is lower than the water level L _2, despite the water level has level detection signal from the electrode rod 346 is to be the full water level L ₆ or more, the water level is no water detection signal from the electrode rod 345 than but valve閉水position _{L 5} When low, despite the water level has level detection signal from the electrode rod 346 is to be the full water level L ₆ or more, the water level detection signal level no water reduction position from the electrode rod 344 L ₄ If it is lower than that, it is considered that an abnormality has occurred in the circuit in the water level detector 34. Therefore, also in these cases, the control unit 22 outputs a detector abnormality alarm to the outside.

Further, when there is a water level detection signal from the electrode rod 346 and the water level is not less than the full water level L ₆ and the pump 16 is driven, a predetermined time has elapsed since the water level detection signal from the electrode rod 346 was received. even after, when continue receiving the level detection signal from the electrode rod 346, or after the pump 16 the water level is below the empty water level L ₁ is a predetermined time has passed since the stop also, the electrode rod 342 and the electrode rod Even when there is no water level detection signal from 345 and the water level does not become the open water level L ₂ or the closed water level L ₅ , it is considered that an abnormality has occurred in the circuit in the water level detector 34. Therefore, also in these cases, the control unit 22 outputs a detector abnormality alarm to the outside.

  As described above, in this embodiment, the wiring in the water level detector 34 is mistakenly connected or the circuit in the water level detector 34 is damaged due to a surge caused by a lightning strike to the water receiving tank 14. In this case, since the detector abnormality alarm is output to the outside, an accident caused by the abnormality of the circuit in the water level detector 34 can be prevented in advance.

  FIG. 3 is a schematic diagram showing a water supply device 110 using the water level control device according to the second embodiment of the present invention. The discharge pipe 24 on the discharge side of the water supply device 110 extends to an elevated water tank 40 installed at the top of a building such as a building or an apartment, and the water in the water receiving tank 14 is pumped into the elevated water tank 40 by driving the pump 16. It is supposed to be. The elevated water tank 40 is connected to a water supply pipe 42 that extends to the water supply terminal 26 of the customer, and the water stored in the elevated water tank 40 is supplied to the water supply terminal 26 of the consumer.

  The elevated water tank 40 is provided with a water level detector 44 that detects the internal water level. The water level detector 44 is connected to the control unit 22 of the water supply device 110, and the operation of the pump 16 is controlled by an output signal from the water level detector 44. That is, a water level control device that detects the water level of the elevated water tank 40 and controls the amount of water pumped up from the water receiving tank 14 by the pump 16 and supplied to the elevated water tank 40 according to the detected water level is provided with the water level detector 44. It is comprised by the control part 22 of the water supply apparatus 10. FIG.

  The water level detector 44 in the present embodiment is configured to detect the water level of the elevated water tank 40 step by step with a plurality of electrode rods. In the example shown in FIG. 3, the water level detector 44 includes five electrode bars 440 to 444 having different lengths, and these electrode bars 440 to 444 provide four liquid level levels (full water level, pump stop water level, The pump operating water level and the reduced water level) are detected.

  Among the electrode rods 440 to 444, the longest electrode rod 440 is a ground electrode rod, and the other electrode rods 441 to 444 are electrode rods set to a length corresponding to the water level to be detected. In the example shown in FIG. 3, in order from the longest, an electrode rod 441 for detecting a water reduction level, an electrode rod 442 for detecting a pump operating water level, an electrode rod 443 for detecting a pump stop water level, an electrode rod 444 for detecting a full water level, It has become.

  In such a water level detector 44, the water level is higher than the lower ends of the electrode rods 441 to 444 by detecting a change in resistance value between the electrode rods 441 to 444 and the longest ground electrode rod 440. The position is detected. That is, the water level detector 44 detects the water level when the water level of the elevated water tank 40 is higher than the lower ends of the electrode rods 441 to 444 and the electrode rods 441 to 444 and the ground electrode rod 440 are electrically connected by water. A signal is output to the control unit 22.

FIG. 4 is a conceptual diagram showing the relationship between the electrode bars 441 to 444 of the water level detector 44 of FIG. 3 and the water level. The water reduction level L ₁₁ is a water level that issues a water reduction alarm when it becomes lower than the water level, and is detected by the electrode rod 441. That is, when the water level becomes lower than the reduced water level L ₁₁ , the water level detection signal is not output from the electrode rod 441 to the control unit 22, but when the water level detection signal from the electrode rod 441 disappears, the control unit 22 decreases the water level. it is determined that falls below the L _11, emits a water-reducing alarm to the outside.

The pump operation water level L ₁₂ is a water level at which the pump 16 is operated when the water level becomes lower than the water level, and is detected by the electrode rod 442. That is, when the water level is lower than the pump operation the water level L _12, although the water level detection signal to the controller 22 from the electrode rod 442 is not output, the control unit 22, the water level when the water level detection signal from the electrode rod 442 is eliminated pump determines that below the operating water level L _12, supplying water to high置水tank 40 by driving the pump 16.

The pump stop water level L ₁₃ is a water level at which the pump 16 stops when the water level is higher than the water level, and is detected by the electrode rod 443. That is, when the water level is above the pump stop level L _13, although the water level detection signal to the controller 22 from the electrode rod 443 is output, the control unit 22 receives a level detection signal from the electrode rod 443 When the water level pump stop determines that exceeds the level _{L 13,} stops the pump 16.

The full water level L ₁₄ is a water level that issues a full water alarm when the water level is higher than the water level, and is detected by the electrode rod 444. That is, when the water level is full level L ₁₄ or more, although the water level detection signal to the controller 22 from the electrode rod 444 is output, the control unit 22, the water level when receiving the level detection signal from the electrode rod 444 is full water level L It judges that it exceeded ₁₄ , and issues a full water warning to the outside.

Here, for example, consider the case where the water level of the high置水tank 40 is between the pump operation the water level L ₁₂ and pump stop level L _13. When the water level of the high置水tank 40 by the use of water in the water supply terminal 26 is below the pump operating water level L _12, control unit 22 starts the pump 16, pump water to a high置水tank 40. Thus when the still water level water is introduced below the now decreased water level L ₁₁ low, water reducing alarm is issued. The high置水tank 40 water is supplied to rise water level exceeds the pump stop level L _13, the pump 16 is stopped the supply of water to the high置水tank 40 is stopped. Thus when the still water level pump 16 is stopped exceeds the full water level L ₁₄ elevated, full level alarm is issued.

  Here, in this embodiment, the control unit 22 always determines whether or not there is an incompatible combination regarding the presence or absence of the water level detection signal from each electrode rod 441 to 444, and there is an incompatible combination. In this case, a detector abnormality alarm is output to the outside because the water level detector 44 is abnormal.

For example, when there is no water level detection signal from the electrode bar 441, there cannot be a water level detection signal from the electrode bar 444. In other words, despite the water without the water level detection signal from the electrode rod 441 is lower than the water-reducing position L _11, the water level there is the water level detection signal from the electrode rod 444 is at full level L ₁₄ higher It is unlikely that the circuit in the water level detector 44 has failed for some reason. In such a case, the control unit 22 issues a detector abnormality alarm to the outside. When the control unit 22 issues a detector abnormality alarm to the outside, the operation of the pump 16 may be continued as it is or may be stopped.

Similarly, although there is no water level detection signal from the electrode rod 441 and the water level is lower than the reduced water level L ₁₁ , there is a water level detection signal from the electrode rod 442 and the water level is the pump operating water level L _12. Even in the case described above, it is considered that an abnormality has occurred in the circuit in the water level detector 44. Therefore, also in this case, the control unit 22 outputs a detector abnormality alarm to the outside.

  As described above, in this embodiment, the wiring in the water level detector 44 is mistakenly connected, or the circuit in the water level detector 44 is damaged by a surge caused by a lightning strike to the elevated water tank 40. In this case, a detector abnormality alarm is output to the outside, so that an accident caused by a circuit abnormality in the water level detector 44 can be prevented in advance.

  FIG. 5 is a schematic diagram showing a drainage device 210 using the water level control device in the third embodiment of the present invention. As shown in FIG. 5, the drainage device 210 includes a pump 52 installed inside the drainage tank 50 and a control unit 54 that controls the pump 52. Drainage such as dirty water is introduced into the drainage tank 50 from the inflow pipe 56, and this drainage is stored in the drainage tank 50. The waste water stored in the drain tank 50 is discharged to the outside through the drain pipe 58 by the pump 52 controlled by the control unit 54.

  The drain tank 50 is provided with a water level detector 60 for detecting the internal water level. The water level detector 60 is connected to the control unit 54 of the drainage device 210, and the operation of the pump 52 is controlled by an output signal from the water level detector 60. That is, a water level control device that detects the water level of the drain tank 50 and controls the amount of drainage discharged from the drain tank 50 according to the detected water level is constituted by the water level detector 60 and the control unit 54.

  The water level detector 60 in the present embodiment is configured to detect the water level of the drainage tank 50 step by step with a plurality of float switches. FIG. 6 is a conceptual diagram illustrating the relationship between the float switches 601 to 604 of the water level detector 60 and the water level in the present embodiment. As shown in FIG. 6, the water level detector 60 in this embodiment includes four float switches 601 to 604 arranged at different heights (only two are shown in FIG. 5), and these float switches. From 601 to 604, four liquid level levels (full water level, pump operation water level, pump stop water level, reduced water level) are detected.

  The float switches 601 to 604 are arranged at a height corresponding to the water level to be detected. In the example shown in FIG. 6, the float switch 601 that detects the reduced water level and the pump stop water level are detected in order from the lowest. A float switch 602 for detecting the pump operating water level, and a float switch 604 for detecting the full water level. Such a water level detector 60 outputs a water level detection signal to the control unit 54 when the water level of the drain tank 50 rises and the float switches 601 to 604 float from the installation position.

The water reduction level L ₂₁ is a water level that issues a water reduction alarm when it becomes lower than the water level, and is detected by the float switch 601. That is, when the water level is lower than the water-reducing position L _21, although the water level detection signal to the controller 54 from the float switch 601 is not output, the control unit 54, when the water level detection signal from the float switch 601 is eliminated water level water reduction position it is determined that falls below the L _21, emits a water-reducing alarm to the outside.

The pump stop water level L ₂₂ is a water level at which the pump 52 is stopped when it becomes lower than the water level, and is detected by the float switch 602. That is, when the water level becomes lower than the pump stop water level L ₂₂ , the water level detection signal is not output from the float switch 602 to the control unit 54, but when the water level detection signal from the float switch 602 disappears, the control unit 54 It determines that below the stop level _{L 22,} stops the pump 52.

The pump operation water level L ₂₃ is a water level at which the pump 52 is operated when the water level becomes equal to or higher than the water level, and is detected by the float switch 603. That is, when the water level is above the pump operating water level L _23, although the water level detection signal to the controller 54 from the float switch 603 is output, the control unit 54 receives the water level pump operation the water level detection signal from the float switch 603 It determines that exceeds the level L _23, driving a pump 52 for discharging the waste water from the drainage tank 50.

The full water level L ₂₄ is a water level that issues a full water alarm when the water level is higher than the water level, and is detected by the float switch 604. That is, when the water level reaches or exceeds the full water level L ₂₄ , a water level detection signal is output from the float switch 604 to the control unit 54, but when the control unit 54 receives the water level detection signal from the float switch 604, the water level becomes the full water level L. It judges that it exceeded ₂₄ and issues a full water warning to the outside.

Here, for example, consider a case where the water level of the drain tank 50 is between the pump stop water level L ₂₂ and the pump operation water level L ₂₃ . When drainage is introduced into the drainage tank 50 and the water level of the drainage tank 50 exceeds the pump operation water level L ₂₃ , the control unit 54 starts the pump 52 and discharges the drainage from the drainage tank 50. In this way, even if drainage is discharged, if the water level is still high and exceeds the full water level L ₂₄ , a full water warning is issued. It is discharged drainage from drain tank 50 lowers the water level, below the pump stop level L _22, the waste water from the pump 52 is stopped sump 50 is stopped. Thus if the pump 16 is below the decreased water level L ₂₁ decreases the still water level is stopped, the water reducing alarm is issued.

  Here, in this embodiment, the control unit 54 always determines whether or not there is an incompatible combination regarding the presence or absence of the water level detection signal from each of the float switches 601 to 604, and there is an incompatible combination. In this case, a detector abnormality alarm is output to the outside because the water level detector 60 is abnormal.

For example, when there is no water level detection signal from the float switch 601, there cannot be a water level detection signal from the float switch 604. That is, there is no water level detection signal from the float switch 601 and the water level is lower than the reduced water level L _21, but there is a water level detection signal from the float switch 604 and the water level is greater than or equal to the full water level L _24. It is impossible to do so, and it is considered that the circuit in the water level detector 60 has failed for some reason. In such a case, the control unit 54 issues a detector abnormality alarm to the outside. When the control unit 54 issues a detector abnormality alarm to the outside, the operation of the pump 52 may be continued as it is or may be stopped.

Similarly, although there is a water level detection signal from the float switch 604 and the water level is not less than the full water level L ₂₄ , there is no water level detection signal from the float switch 603 and the water level is the pump stop water level L _22. or if is lower than the water level detection signal level without despite the lower than water reducing position L ₂₁ from the float switches 601, there is a water level detection signal from the float switch 602 water level There is also a case which is at pump stop level L ₂₂ or more, is considered to be abnormal circuitry in the water level detector 60 has occurred. Therefore, also in this case, the control unit 54 outputs a detector abnormality alarm to the outside.

  Thus, in this embodiment, the wiring in the water level detector 60 is mistakenly connected or the circuit in the water level detector 60 is damaged due to a surge caused by a lightning strike to the drain tank 50. In this case, since the detector abnormality alarm is output to the outside, an accident caused by an abnormality in the circuit in the water level detector 60 can be prevented in advance.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a schematic diagram which shows the water supply apparatus using the water level control apparatus in the 1st Embodiment of this invention. It is a conceptual diagram which shows the relationship between the electrode rod and water level of the water level detector of FIG. It is a schematic diagram which shows the water supply apparatus using the water level control apparatus in the 2nd Embodiment of this invention. It is a conceptual diagram which shows the relationship between the electrode rod and water level of the water level detector of FIG. It is a schematic diagram which shows the drainage apparatus using the water level control apparatus in the 3rd Embodiment of this invention. It is a conceptual diagram which shows the relationship between the float switch of the water level detector of FIG. 5, and a water level.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,110 Water supply apparatus 14 Receiving tank 16,52 Pump 22,54 Control part 26 Water supply terminal 32 Electromagnetic valve 34,44,60 Water level detector 40 High water tank 50 Drain tank 210 Drain apparatus 340-346,440-444 Electrode rod 601 to 604 float switch L ₁ drought level L ₂ valve opening water level L ₃ return water level L ₄ , L ₁₁ , L ₂₁ water reduction level L ₅ valve closing water level L ₆ , L ₁₄ , L ₂₄ full water level L ₁₂ , L ₂₃ pump operation Water level L ₁₃ , L ₂₂ Pump stop water level

Claims (10)

A water level detector that outputs a water level detection signal when the water level of the water tank that stores water therein is higher than a predetermined water level, and the water level of the water tank based on the water level detection signals for a plurality of water levels from the water level detector. A water level control device for a water supply / drainage tank having a control unit to control,
The control unit outputs a detector abnormality alarm to the outside when there is an incompatible combination regarding the presence or absence of water level detection signals for a plurality of water levels from the water level detector. .   The said water tank is a water receiving tank connected to the pump which supplies water to a water supply terminal, The water level control apparatus of the water supply / drainage tank of Claim 1 characterized by the above-mentioned. The incompatible combination is
A combination of the absence of a water level detection signal for a predetermined drought level and the presence of a water level detection signal for a predetermined full water level,
A combination of having a water level detection signal for a predetermined return water level at which the pump can be restarted and no water level detection signal for the drought level;
A combination of the absence of a water level detection signal for a predetermined water reduction level and the presence of a water level detection signal for a predetermined valve closing water level that closes an electromagnetic valve that controls the supply of water to the water receiving tank,
A combination of the presence of a water level detection signal for the full water level and the absence of a water level detection signal for the valve opening water level that opens the solenoid valve,
The combination of the presence of a water level detection signal for the full water level and the absence of a water level detection signal for the closed water level, and the presence of a water level detection signal for the full water level, and the absence of a water level detection signal for the reduced water level. In combination with
The water level control device for a water supply / drainage tank according to claim 2, wherein the water level control device is at least one of the two.   When the control unit continues to receive the water level detection signal for the full water level even after a predetermined time has elapsed with the pump being driven after receiving the water level detection signal for the predetermined water level, the detection The water level control device for a water supply / drainage tank according to claim 2, wherein a vessel abnormality alarm is output.   When the control unit receives a water level detection signal for the open valve level of the electromagnetic valve when the pump is stopped, the control unit closes the electromagnetic valve that controls the supply of water to the water receiving tank after a predetermined time has elapsed. The water level control device for a water supply / drainage tank according to claim 2, wherein when the water level detection signal for the valve water level is not received, the detector abnormality alarm is output.   When the control unit receives a water level detection signal for the closed water level of the solenoid valve when the pump is stopped, the control unit opens a solenoid valve that controls the supply of water to the water receiving tank. The water level control device for a water supply / drainage tank according to claim 2, wherein the detector abnormality alarm is output when no signal is received.   The water level control device for a water supply / drainage tank according to claim 1, wherein the water tank is an elevated water tank that stores water pumped up by a pump. The incompatible combination is
A combination of the absence of a water level detection signal for a predetermined water level and the presence of a water level detection signal for a predetermined water level, and the absence of a water level detection signal for the water level, and a predetermined start of operation of the pump In combination with the water level detection signal for the operating water level,
It is at least 1 of these, The water level control apparatus of the water supply / drainage tank of Claim 7 characterized by the above-mentioned.   The said water tank is a drain tank which has a pump which stores waste_water | drain and discharges this waste_water | drain outside, The water level control apparatus of the water / drainage tank of Claim 1 characterized by the above-mentioned. The incompatible combination is
A combination of the absence of a water level detection signal for a predetermined water level and the presence of a water level detection signal for a predetermined full water level,
A combination of the presence of a water level detection signal for the full water level, the absence of a water level detection signal for a predetermined stop water level for stopping the operation of the pump, and the absence of a water level detection signal for the reduced water level, and the stop water level In combination with the water level detection signal for
It is at least 1 of these, The water level control apparatus of the water supply / drainage tank of Claim 9 characterized by the above-mentioned.

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