KR100459385B1 - Apparatus for controlling water level of tank - Google Patents

Abstract

The present invention is a reservoir tank water level control device used in the pressurized water supply system has a different height in the reservoir tank consisting of a plurality of electrodes formed sequentially, the bottom electrode is flooded in connection with the power source and the other electrodes are sequentially flooded through water A water level sensor for generating a signal to detect the water level in the reservoir by the current flow to the control unit of the pressurized water supply system, and is automatically operated by the control unit, supplying or blocking water through the water pipe to the water tank It includes a straight pipe valve to control the level of water. Therefore, the control unit of the pressurized water supply system detects and supplies the state of the water reservoir so that the water level can be precisely controlled to prevent the pump from idling. Also, the water level is displayed on the second display unit as a letter so that the user can change the water level. Make it easy to see.

Description

Apparatus for controlling water level of tank}

The present invention relates to a reservoir level control apparatus for sensing and controlling the level of the reservoir connected to the suction pipe of the pressurized water supply system.

In general, the high-cost reservoir water supply system is a method of dropping the water in the open reservoir installed on the roof of the building by gravity to feed the water in the building. The high water tank water supply method requires pumping of underground or ground water to the water tank installed on the roof of the building by the pump, so that the power consumption is high and the construction cost is increased when the water is loaded by the water tank. In addition, the high-water reservoir water supply method has a hygiene problem due to the accumulation of suspended matter in the reservoir, invasion of foreign matters and insects, or proliferation of bacteria.

Therefore, a pressurized water supply system that directly pulls up the water stored in the underground reservoir and supplies it to the user without using the expensive reservoir is used.

1 is a block diagram of a general pressurized water supply system.

A general pressurized water supply system includes a control unit 11, a standard pump (P1) (P2) (P3) (P4) (P5) (P6), low flow pump (NP), reservoir (13), inverter unit 15, pressure tank 17, the water sensor 19 and the pressure sensor 21.

The reservoir 11 stores the water to be pumped (pumping) to the user supplied through the water pipe (25).

A plurality of standard pumps P1, P2, P3, P4, P5, and P6, for example, six are installed in parallel to supply water from the reservoir 13 to the user. That is, one or two or more selected by the control unit 11 is driven to supply the water of the reservoir 13 to the user through the suction pipe 27 and the discharge pipe 29.

The inverter section 15 controls the output of the predetermined standard pumps P1, P2, P3, P4, P5, and P6 in accordance with the pressure of the discharge pipe 29. In the above, the control unit 11 gradually operates a predetermined one of the predetermined standard pumps P1, P2, P3, P4, P5, and P6 so that the output is increased, and the discharge pipe 29 even when the output is maximum. If the pressure is low, the rest will be operated at maximum output sequentially. However, when the pressure of the discharge pipe 29 is increased by the operation of the remaining standard pumps, the inverter unit 15 lowers the output of the predetermined standard pump to match the total output with the pressure of the discharge pipe 29. The control unit 11 converts the pressure of the discharge pipe 29 into an analog value to determine the number of operation of the standard pumps P1, P2, P3, P4, P5, and P6, and the inverter unit 15 Determine the number of revolutions of the standard pump and provide it.

The low flow rate pump NP operates under the control of the control unit 11 when the amount of water used is low, such as at night. The control unit 11 stops the operation of the standard pump (P1) (P2) (P3) (P4) (P5) (P6) during the time when the amount of water is low, such as at night, and the amount of water consumed less power consumption due to the small amount of water supply Start the pump (NP).

The pressure tank 17 is discharged when the pressure of the discharge pipe 29 is increased by the water pumped by starting the standard pumps P1, P2, P3, P4, P5, and P6. The unused water is accumulated to supply water to the user through the discharge pipe 29 by the accumulated pressure even when the standard pumps P1, P2, P3, P4, P5, and P6 are stopped. Therefore, the number of starts of the standard pumps P1, P2, P3, P4, P5, and P6 can be reduced to extend the life of the pump and save energy.

The water sensor 19 detects the presence or absence of water in the suction pipe 29. When the standard pumps P1, P2, P3, P4, P5, and P6 operate in the absence of water in the suction pipe 29, failure may occur due to idling. Therefore, the water detection sensor 19 detects the pipe state of the suction pipe 27 and transmits it to the control unit 11. When the water detection sensor 19 detects that there is no water in the suction pipe 27, the control unit 11 Standard pumps P1, P2, P3, P4, P5, and P6 are operated to prevent idling, thereby preventing failure.

The pressure sensor 21 detects the water pressure of the discharge pipe 29 and transmits it to the control unit 11. Accordingly, the control unit 11 calculates the proportional integral derivative (PID) of the pressure value delivered by the pressure sensor 21 to calculate the number of operating units of the standard pumps P1, P2, P3, P4, P5 and P6. The inverter unit 15 determines the rotation speed of the predetermined standard pump.

The general pressurized water supply system described above is provided with a device for adjusting the water level of the reservoir (13).

An apparatus for adjusting the water level of a reservoir according to the prior art is disclosed in 1993 Patent No. 29862 (name of the invention: the level control device of the supply / drain tank).

The water level control device of the water supply / drainage tank according to the prior art includes a water supply pump for executing water supply or drainage in a water reservoir, a power supply unit for supplying power required for level detection and pump driving control, and a water tank receiving power from the power supply unit. A high water level sensor for detecting a high water level in the water supply unit, a low water level sensor for detecting a low water level in the water tank by receiving power from the power supply unit, a sewage sensor for sensing a low water level for drainage of the sewage in the water tank by receiving power from the power supply unit, and A water level detection unit for outputting water supply or drainage operation control signals by latching a signal detected by the common electrode sensor that forms a common electrode of the high water level sensor, the low water level sensor, and the sewage sensor by receiving power from a power supply unit, and the high water level sensor and the low water level sensor. And, by selecting the output signal of the water level detection unit automatic A water supply / drainage switch for switching the water drainage, a manual drainage control unit for executing and controlling wastewater drainage processing in response to selection of a signal detected by the sewage sensor and an automatic / manual switch, and the water supply / drainage switch and the manual drainage An automatic / manual switch which selects an output of the control unit to switch the automatic / manual operation of the supply / drainage operation, and a pump driving unit which operates or stops the water supply pump according to the output signal of the automatic / manual switch.

However, the water level control device of the water supply / drainage tank according to the prior art merely adjusts the water level of the water tank, and is installed separately from the pressure water supply system and is not controlled by this pressure water supply system, so that the inside of the suction pipe cannot be detected as well. There was a problem that can not prevent the idling of the pump can not know the state of the water level.

Accordingly, an object of the present invention is to provide a reservoir level control apparatus that can be controlled by the control unit of the pressurized water supply system to prevent idling of the pump.

Water reservoir control device of the pressurized water supply system according to the present invention for achieving the above object is made of a plurality of electrodes sequentially formed with different heights in the reservoir, the bottom electrode is flooded connected to the power source and the remaining electrodes sequentially A water level sensor which generates a signal to detect the water level in the reservoir by being flooded and current flows through the water and transmits it to the controller of the pressurized water supply system, and is automatically operated by the controller and supplies water through a water pipe. Or a straight pipe valve for blocking and adjusting the water level of the reservoir.

The level sensor is a signal generator for detecting a current flowing through the water level sensor to generate a detection signal, a display unit for emitting light by the detection signal generated by the signal generator to display the level, and generated in the signal generator And a water level sensing circuit diagram configured by an input unit for inputting the sensed signal to the control unit and a second display unit displaying, by text, the water level state of the water tank by the control unit.

1 is a block diagram of a general pressurized water supply system.

Figure 2 is a block diagram of a reservoir level control device according to the present invention.

3 is a water level detection circuit operated by the water level sensor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram of a reservoir level control apparatus according to the present invention.

Reservoir tank level control apparatus according to the present invention includes a water level sensor 31 and the water pipe valve 33.

In the above, the water level sensor 31 has a different height in the reservoir 13, and a plurality of sequentially formed, for example, the first, second, third, fourth and fifth electrodes E1 and E2. (E3) (E4) (E5). In this case, the fifth electrode E5 is connected to the AC power source AC, and the first, second, third and fourth electrodes E1, E2, E3, and E4 are immersed in the reservoir 13 together with each other. The current may flow between the fifth electrode E5 and each of the first, second, third and fourth electrodes E1, E2, E3, and E4. That is, some of the first, second, third, fourth, and fifth electrodes E1, E2, E3, E4, and E5, for example, the third, fourth, and fifth electrodes E3. If (E4) (E5) is in the submerged state, current flows through the water between the fifth electrode (E5) and the third and fourth electrodes (E3) and (E4) connected to the power source to raise the water level of the reservoir (13). Make sense.

The water pipe valve 33 is electrically operated and is automatically operated by a CPU (not shown) of the controller 11 to supply water through the water pipe 25 to adjust the water level of the water storage tank 13.

3 is included in the control unit 11 of the pressurized water supply system as a water level detection circuit operated by the water level sensor 31.

The water level detection circuit includes a signal generator 35, a first display unit 38, an input unit 39, a CPU 41, and a second display unit 43.

The signal generator 35 includes the first, second, third and fourth photocouplers U1, U2, U3, U4, and resistors R1, R2, and R3 connected to a DC power supply Vcc. ) R4. The bidirectional diode and resistors R1, R2, R3, and R4 of the first, second, third, and fourth photocouplers U1, U2, U3, and U4 are AC power. And a closed circuit with the fifth electrode E5, the first, second, third and fourth electrodes E1, E2, E3, and E4.

In the above, a current flows between the fifth electrode E5 and the first, second, third and fourth electrodes E1, E2, E3, and E4 through water. That is, among the first, second, third, and fourth electrodes E1, E2, E3, and E4, the current is caused to flow between the first electrodes E1. Therefore, the first, second, third and fourth photocouplers U1, U2, U3 and U4 are driven by a current to generate a detection signal.

The first display unit 37 includes resistors R5, R6, R7, and R8, and first, second, third, and fourth light emitting diodes L1, L2, L3, and L4. The first, second, third and fourth light emitting diodes L1, L2, L3 and L4 are the first, second, third and fourth photocouplers U1, U2, U3, U3 and U4. The light is emitted by the detection signal generated by) to display the water level inside the reservoir 13.

The input unit 38 is composed of a filter consisting of resistors R9, R10, R11, R12, and capacitors C1, C2, C3, and C4. In the above, the input unit 38 transmits a detection signal input from the display unit 37 to the CPU 41. Accordingly, the CPU 41 drives the straight pipe valve 33 to supply water to the reservoir 13.

The second display unit 43 is composed of a display panel such as an LCD (Liquid Crystal Display), and displays the state of the water level of the reservoir 13, i.e., full water, normal water, low water, low water, and the like under the control by the CPU 41. To inform the user.

The operation of the water tank level control device using the water level sensing circuit of the above-described configuration will be described.

Reservoir tank level control apparatus according to the present invention is to operate in a mode in which the reservoir 13 is in a normal state in the water-reducing state, and a mode in which the water-reducing state in the normal state as shown in the following table.

In the table, when the first, second, third and fourth light emitting diodes L1, L2, L3, and L4 are operated to emit light, the first, second, third and fourth electrodes E1 ( E2) (E3) (E4) is submerged in water and shows the full water level which overflows the reservoir 13, and is in an error state.

Therefore, the CPU 41 closes the water pipe valve 33 to block the supply of water flowing into the reservoir 13, and operates a buzzer (not shown) while displaying an error state to generate a warning sound.

When the second, third, and fourth light emitting diodes L2, L3, and L4 operate, the second, third, and fourth electrodes E2, E3, and E4 are submerged in water. In the normal state, water is shown. Therefore, the CPU 41 closes the water pipe valve 33 and into the water tank 13 (Table)

condition Display Buzzer Solenoid valve Pump E1 detection Only number Action Closing force driving E2 detection normal stop Closing force driving E3 detection normal stop Keep old driving E4 detection Supervision stop Open forest driving E4 not detected Can go Action Open forest stop Electrode error Electrode error Action Closing force stop

Shut off the incoming water supply. At this time, the buzzer does not operate.

When the third and fourth light emitting diodes L3 and L4 are operated using water in the reservoir 13, the third and fourth electrodes E3 and E4 are submerged in water. Steady state is shown in normal state. Therefore, the CPU 41 closes the water pipe valve 33 to cut off the supply of water introduced into the reservoir 13. At this time, the buzzer does not operate.

However, if the water reservoir 13 is in a state where water is being supplied in the water-reducing state, the error state due to water supervision is released and becomes a normal state, while the CPU 41 maintains the previous state in which the water pipe valve 33 is open. At this time, water is supplied until the second electrode E2 is sensed and the second light emitting diode L2 is operated. And, when the water reservoir 13 is in a state in which water is drained and the water level is lowered in the full state, the error state caused by the full water is released to become a normal state, and the CPU 41 returns to the previous state in which the water line valve 33 is closed. Keep it.

When the fourth light emitting diode L4 is operated, the fourth electrode E4 is submerged in water, indicating that the water storage tank 13 is in a water-resistant state. Therefore, the CPU 41 opens the straight pipe valve 33 to supply water into the reservoir 13. At this time, the buzzer does not operate.

If neither of the fourth light emitting diodes L4 is operated, the fourth electrode E4 is not immersed in water, and the reservoir 13 is in an error state due to the low water level. Therefore, the CPU 41 opens the straight pipe valve 33 to supply water into the reservoir 13 and operates the buzzer while displaying an error state to generate a warning sound.

In addition, if one of the first, second, third and fourth light emitting diodes L1, L2, L3, and L4 does not operate, the CPU 41 is not directly connected due to an electrode error. The valve 33 is closed and an electrode error condition is displayed.

When the water level of the reservoir 13 is in the low water state and the electrode error state, all the control unit 11 stops the operation of the pump to prevent a failure due to idling.

The water level of the reservoir 13 is displayed on the second display portion 43 by the CPU 41 so that the user can easily see.

Therefore, in the present invention, the control unit of the pressurized water supply system detects and supplies the state of the water storage tank so that the water level can be precisely controlled to prevent idling of the pump. This has the advantage of making it easy to see the water level.

Claims (2)

delete It consists of a plurality of electrodes having different heights and formed sequentially in the reservoir, the bottom electrode is submerged in connection with the power source and the remaining electrodes are sequentially submerged to detect a signal level in the reservoir by the current flowing through the water A water level sensor generated and delivered to the control unit of the pressurized water supply system; In the reservoir water level control apparatus of the pressurized water supply system which is automatically operated by the control unit and includes a water pipe valve for controlling the water level of the water tank by supplying or blocking water through the water pipe. The water level sensor, A signal generator for detecting a current flowing through the water level sensor and generating a detection signal; A first display unit which emits light by the detection signal generated by the signal generator and displays the level of water; An input unit for inputting a detection signal generated by the signal generator to the controller; And a water level sensing circuit diagram comprising a second display unit for displaying the water level state of the water tank by the controller as a letter.