JP6329985B2 - Water supply unit - Google Patents

Description

  The present invention relates to a water supply unit that includes two pump units and performs water supply by performing cooperative control thereof.

  As a water supply unit used for well water pumping or the like, a general-purpose model using one set of single operation unit having one control panel, one pump, and one electrical component is known. On the other hand, the model which controls two pumps and an electrical equipment part with one control panel similarly to the water supply unit for building facilities is also known.

  In such a high-end model, it is necessary to mount an inverter unit and an overprotection circuit for controlling two motors. Further, unlike the general-purpose model, a pressure sensor for detecting the pressure in the junction pipe and two flow sensors for detecting a stop flow rate for stopping each pump are provided. In addition to the function of detecting the water level in the water receiving tank using an electrode connected to the electrode circuit and stopping the pump in case of drought, and selecting the pump that can be operated for pump inspection, all pumps An operation panel for stopping the operation is provided. Furthermore, there may be various functions such as a terminal for sending an operation / failure alarm to the outside.

  For this reason, although the said model can share the pump part including a motor with a general purpose model, since it has a receiving tank water level detection function and a pump selection function, a dedicated control panel is required and the manufacturing cost is high.

  For this reason, the operation unit is known to have a configuration in which two sets of independent operation units are used and a control panel for controlling two electrical components incorporated in these units is provided. A unit using two sets of single operation units includes two inverters for operating two pumps in one master control panel, and is connected to one master control panel. The control panel does not require an inverter unit or overload protection unit that controls the motor, and only the electrode circuit, operation panel, and alarm circuit as described above are required, so it can be manufactured inexpensively with a relatively simple microcomputer circuit. It becomes possible. With this master control panel, an operation signal and a failure signal of the electrical unit of the single operation unit are detected. In addition, in order to command permission / prohibition of operation, operation is permitted when the interrupt signal is ON, and operation is prohibited when the interrupt signal is OFF. Alternating parallel operation in which operation units are operated simultaneously (parallel operation) is performed (for example, see Patent Document 1). In such a water supply unit, one independent operation unit is used as a main machine, and the other independent operation unit is used as a slave machine. In parallel operation, the electrical unit is set to lower the target pressure of the slave machine from the target pressure of the master machine.

  When the operation of the water supply unit is started, the pump of the main machine is operated at a steady target pressure, and an ON signal is sent to the independent operation unit of the slave machine to give an operation permission. When the amount of water supply increases and the discharge pressure decreases to the starting pressure, the electrical equipment set as the slave starts the pump in parallel and operates at a target pressure lower than the target pressure of the main engine. Therefore, since the main machine always operates at a constant speed at the maximum rotation speed and the slave machine performs a speed change operation, the discharge pressure is stabilized without the two pumps repeating pressure fluctuations.

Patent No. 4381252

  In the water supply unit having the two independent operation units (pump units) described above, there are the following problems. In other words, during parallel operation, when the amount of water supply decreases to the amount of water of one pump, the slave unit is controlled to stop the small amount of water, and the main unit that has started operation continues to operate. For this reason, there has been a problem that the original function required for the alternate parallel operation unit is disconnected and the original function of leveling the operation time of each pump as a single operation of the slave unit cannot be performed. Further, in consideration of an increase in piping resistance, there is a problem that the target pressure has to be reduced during parallel operation in which the target pressure should be increased.

  Accordingly, an object of the present invention is to provide a water supply unit that can equalize the operation time of two pump units and can be configured at low cost.

  In order to solve the above problems and achieve the object, the water supply unit of the present invention is configured as follows.

A first pump, a first motor for driving the first pump, a first pump unit having a first electrical unit for controlling the first motor, a second pump, and the second pump. A second motor to be driven, a second pump unit having a second electrical component that controls the second motor, a discharge port of the first pump, and a discharge port of the second pump are connected to each other. An operation signal for detecting an operation state of the junction tube, the first electric component unit, and the second electric component unit, and a failure signal for detecting a failure state are input, and the first electric component unit and the second electric component unit are divided. The operation permission signal can be selectively output to the input input, and the pump permission unit activates a pump unit different from the pump unit at the previous stop by the operation permission signal, and the first electrical component and the second electrical component Is the discharge pressure below the stop flow rate When a decrease is detected, a pause signal is detected by the retry function, and an intermittent pause signal is detected from the electrical component while the operation permission signal is sent to one of the first electrical component and the second electrical component. The control unit that gives the operation permission signal to the other electrical component, and the first electrical component and the second electrical component detect the low temperature by the temperature sensor, the control is performed. part or al, if the operation permission signal to the interrupt input is not given, the control unit sends out a driving signal for intermittently as an antifreezing operation authorization request, the control unit, the first electric part and while sending one electrical unit in operation permission signal of the second electric part, during normal operation of the pump of the electrical part has been given the operation permission signal, the fixed time by small amount of water stopped or low temperature detection When one of the post-formation prevention operation, when detecting an operation signal for intermittently from electrical equipment section is not given the operation permission signal, regarded as antifreezing operation authorization request, the electrical part has been given the operation permission signal The operation permission signal is stopped, and the operation permission signal is sent to the electrical unit that has not been given the operation permission signal.
A first pump, a first motor for driving the first pump, a first pump unit having a first electrical unit for controlling the first motor, a second pump, and the second pump. A second motor to be driven, a second pump unit having a second electrical component that controls the second motor, a discharge port of the first pump, and a discharge port of the second pump are connected to each other. An operation signal for detecting an operation state of the junction tube, the first electric component unit, and the second electric component unit, and a failure signal for detecting a failure state are input, and the first electric component unit and the second electric component unit are divided. The operation permission signal can be selectively output to the input input, and the pump permission unit activates a pump unit different from the pump unit at the previous stop by the operation permission signal, and the first electrical component and the second electrical component Is the discharge pressure below the stop flow rate When a decrease is detected, a pause signal is detected by the retry function, and an intermittent pause signal is detected from the electrical component while the operation permission signal is sent to one of the first electrical component and the second electrical component. The control unit that gives the operation permission signal to the other electrical component, and the first electrical component and the second electrical component detect the low temperature by the temperature sensor, the control is performed. part or al, if the operation permission signal to the interrupt input is not given, the control unit sends out a driving signal for intermittently as an antifreezing operation authorization request, the control unit is given an operation permission signal When the pump of the electrical component is stopped, the operation permit signal is sent to one of the first electrical component and the second electrical component from the electrical component that has not given the operation permit signal. When the operation signal is detected, it is regarded as a freeze-free operation permission request, and the operation permission signal of the electrical part to which the operation permission signal was given is stopped and the operation permission signal is given to the electric part that has not been given the operation permission signal. Is sent out.

  According to the present invention, it is possible to equalize the operation time of the two single operation units and to configure the unit at low cost.

The top view which shows the water supply unit which concerns on one Embodiment of this invention. The circuit diagram which shows the same water supply unit. Explanatory drawing which shows the signal between the control circuit integrated in the water supply unit, and an electrical equipment part. Explanatory drawing which shows the operation | movement flow in the parallel operation model in the same water supply unit. Explanatory drawing which shows the operation | movement flow in the alternating operation model (pressure drop detection mode) in the same water supply unit. Explanatory drawing which shows the operation | movement flow in the alternating operation model (pressure drop detection mode) in the same water supply unit. Explanatory drawing which shows the operation | movement flow in the alternating operation model (freezing prevention mode) in the same water supply unit.

  FIG. 1 is a plan view showing a water supply unit 10 according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing the water supply unit 10. The water supply unit 10 includes an alternate parallel operation model and an alternate operation model, but the basic configuration is the same except for software that operates a control circuit (control unit) 110 incorporated in the integrated control panel 100. Because there is, it explains without distinguishing. In any model, there are a normal operation in which the discharge pressure is detected and an operation to prevent freezing and a freezing prevention operation in which the operation is performed to prevent freezing.

  As shown in FIG. 1, the water supply unit 10 includes a base 11 placed on a floor surface or the like. On the base 11, the 1st pump unit 20, the 2nd pump unit 30, the confluence | merging pipe | tube 50 which connects the discharge pipes 25 and 35 mentioned later, the integration which controls the 1st pump unit 20 and the 2nd pump unit 30 And a control panel 100. In addition, the 1st pump unit 20 and the 2nd pump unit 30 have the structure equivalent to the independent operation unit currently distribute | circulated widely.

  The first pump unit 20 includes a first pump 21, a first motor 22 that drives the first pump 21, and a first electrical unit 23 that controls the first motor 22. The 1st pump 21 has the main body 21a which accommodates an impeller rotatably inside, and the suction inlet 21b and the discharge outlet 21c are provided. Further, a suction pipe 24 is connected to the suction port 21b, and a discharge pipe 25 is connected to the discharge port 21c. The discharge pipe 25 is provided with a flow sensor 26 for detecting the flow rate on / off, a pressure sensor 27 for detecting the discharge pressure, and a temperature sensor 28 for detecting the water temperature in the discharge pipe 25. Outputs from the flow sensor 26, the pressure sensor 27, and the temperature sensor 28 are input to the first electrical component 23. The first electrical component 23 is driven by a DC power supply unit 29.

  The flow sensor 26, the pressure sensor 27, and the temperature sensor 28 are connected to the DC power supply unit 29 and the ground (0 V), respectively, and the pressure output line, the flow output line, and the temperature output line are combined to form a 5-wire sensor. doing.

  The second pump unit 30 includes a second pump 31, a second motor 32 that drives the second pump 31, and a second electrical unit 33 that controls the second motor 32. The 2nd pump 31 has the main body 31a which accommodates an impeller rotatably inside, and the suction inlet 31b and the discharge outlet 31c are provided. Further, a suction pipe 34 is connected to the suction port 31b, and a discharge pipe 35 is connected to the discharge port 31c. The discharge pipe 35 is provided with a flow rate sensor 36 for detecting the flow rate on / off, a pressure sensor 37 for detecting the discharge pressure, and a temperature sensor 38 for detecting the water temperature in the discharge pipe 35. The outputs of the flow sensor 36, the pressure sensor 37, and the temperature sensor 38 are input to the second electrical component 33. The second electrical component 33 is driven by a DC power supply unit 39.

  The flow sensor 36, the pressure sensor 37, and the temperature sensor 38 are connected to the DC power supply unit 39 and the ground (0V), respectively, and the pressure output line, the flow output line, and the temperature output line are combined to form a 5-wire sensor. doing.

  The integrated control panel 100 detects an operation detection signal from each of the first electrical component unit 23 and the second electrical component unit 33 based on the operation mode stored in the storage unit or the like, and transmits an interrupt signal (control circuit). Microcomputer) 110, a display unit 120 such as an LED connected to the control circuit 110, and peripheral devices such as an output relay. The control circuit 110 is connected to a water level detection sensor 140 that detects the water level of the water storage tank (well) W. The water level detection sensor 140 detects the water level with an electrode. In order to prevent corrosion of the electrode rod due to electrolysis, the water level detection sensor 140 creates a positive / negative DC power source from the DC power source and switches this to apply an AC voltage between the electrodes. In addition, a reset button is provided to be pressed for failure.

  The control circuit 110 controls the first electrical unit 23 and the second electrical unit 33 by sending an interrupt signal. That is, as an interrupt signal, two types of operation permission signal (for example, continuous signal of voltage ON) and slave device operation permission signal (for example, intermittent signal BL which repeats voltage 0.5 second ON / 0.5 second OFF). Is set. If there is no interrupt signal (voltage OFF), it means that the operation of the first pump 21 or the second pump 31 is prohibited.

  In addition, as an operation detection signal from the first electrical component 23 or the second electrical component 33 to the control circuit 110, an operation signal (for example, a voltage ON continuous signal) and an anti-freezing operation permission request signal (for example, a voltage of 0. Intermittent signal BL that repeats ON for 5 seconds / OFF for 0.5 seconds), a failure signal (for example, a continuous signal of voltage ON), and a pause signal due to pressure drop (for example, ON / OFF voltage of 0.5 seconds) An intermittent signal BL) that repeats OFF for 0.5 seconds is set.

  The failure detection is performed, for example, when the pump discharge pressure is lower than the startup pressure and the operation permission signal is sent, but the flow sensor on the pump side detects the stop flow rate or less. This is because the pump is not functioning (not pumped) for some reason. The reason why the flow rate is not detected is not the pump failure but the water level shortage of the water storage tank, etc., and it may be possible to re-pump water due to the recovery of the water level. Even if it is detected, it may have a retry function of restarting after a certain period of time.

  The outputs of the DC power supply units (DC 12V power supply units) 29 and 39 used in the self-circuit are connected to the control circuit 110 in each of the first electrical unit 23 and the second electrical unit 33 described above. The circuit 110, the display unit 120, the output relay, and the like are driven. Thereby, the integrated control panel 100 does not need to be provided with a power source unit such as an independent AC power source. This eliminates the need for fuses, surge absorbers, arresters, common mode choke coils, bypass capacitors, etc. associated with the AC power supply, simplifies the internal substrate, and enables low-cost manufacturing. Note that the capacity of the DC 12V power supply unit provided in each of the first electrical component unit 23 and the second electrical component unit 33 may be increased according to the power supply amount to the control circuit 110.

The operation in the parallel operation model will be described with reference to the operation flowchart of FIG. In the description of FIG. 4, the first pump 21 is described as an A pump and the second pump 31 is described as a B pump.
<Parallel operation model / normal operation>
When the operation is started for the first time after the power is turned on, the control circuit 110 determines which of the A pump and the B pump is to be the main machine / slave machine (ST10). If the previous pump is the B pump, the process proceeds to ST100, and if it is the B pump, the process proceeds to ST200 (ST20). First, the case where the A pump is the main machine and the B pump is the slave machine will be described.

  An operation permission signal is sent from the control circuit 110 to the first electrical equipment section 23, and the A pump is operated at a constant pressure at a target pressure (ST100). In control circuit 110, it is determined whether or not an operation detection signal from first electrical component 23 is detected (ST101). If not detected, the process returns to ST100 (NO in ST101), and if detected, the process proceeds to ST102 (ST101). YES)

  In the first electrical equipment section 23, the A pump is operated at a variable speed at a target pressure (ST102), and the control circuit 110 sends a follower operation permission signal to the second electrical equipment section 33 to give an operation permission as a slave equipment. In the second electrical equipment section 33, it is determined whether the feed water flow rate is increased and the discharge pressure is reduced to the starting pressure (ST103). If it is high, the flow returns to ST102 (NO in ST103), and if low, the flow proceeds to ST104. (YES in ST103), the B pump is activated (parallel activation), and the B pump is operated at a constant speed at the maximum rotation speed (ST104).

  As a result, the A pump as the main machine operates at a variable speed and the B pump as the slave machine operates at a constant speed at the maximum rotation speed, so that the discharge pressure is stabilized without the two pumps repeating pressure fluctuations.

  When the feed water flow rate of the A pump is detected (ST105) and the feed water flow rate decreases and falls below the feed water flow rate for one unit (YES in ST105), the first electrical unit 23 reduces the A pump operating at variable speed. The amount of water is stopped (ST106). If not lower, the feed water flow rate is continuously detected (NO in ST105). That is, when the feed water flow rate decreases, the starting A pump is disconnected. Next, an operation permission signal is sent from the control circuit 110 to the second electrical component 33 (ST107), and the second electrical component 33 operates the B pump at a variable speed at a target pressure (ST108). At this time, it is determined whether or not the feed water flow rate is lower than the stop flow rate (ST109). If not lower (NO in ST109), the process proceeds to ST203 described later.

  Further, when the feed water flow rate decreases and falls below the stop flow rate (YES in ST109), the B pump is stopped by a small amount of water (ST110) and stopped (ST300).

  Next, a case where the A pump is a slave and the B pump is a main machine will be described. An operation permission signal is sent from the control circuit 110 to the second electrical component 33, and the second electrical component 33 operates the B pump at a constant pressure at a target pressure (ST200). In control circuit 110, it is determined whether or not an operation detection signal from second electrical component section 33 is detected (ST201). If not detected, the process returns to ST200 (NO in ST201), and if detected, the process proceeds to ST202 (ST201). YES)

  The control circuit 110 operates the B pump at a variable speed at the target pressure (ST202), sends a follower operation permission signal to the first electrical component 23, and gives permission to operate as a slave device. The first electrical unit 23 determines whether or not the feed water flow rate is increased and the discharge pressure is reduced to the starting pressure (ST203). If it is high, the flow returns to ST202 (NO in ST203), and if low, the flow returns to ST204. Advance (YES in ST203), activate the A pump (parallel activation), and operate at a constant speed at the maximum rotation speed (ST204).

  As a result, the B pump as the main machine operates at a variable speed and the A pump as the slave machine operates at a constant speed at the maximum rotation speed, so that the discharge pressure is stabilized without the two pumps repeating pressure fluctuations.

  The second electrical component 33 detects the feed water flow rate of the B pump (ST205), and when the feed water flow rate decreases and falls below the feed water flow rate for one unit, the B pump operating at a variable speed stops a small amount of water (ST206). . That is, the preceding B pump is disconnected. Next, an operation permission signal is sent from the control circuit 110 to the first electrical equipment section 23 (ST207), and the A pump is operated at a variable speed at a target pressure (ST208). At this time, it is determined whether or not the feed water flow rate is lower than the stop flow rate (ST209), and if not lower, the process proceeds to ST103 described above (NO in ST209).

  Further, when the water supply flow rate decreases and falls below the stop flow rate (YES in ST209), the A pump is stopped by a small amount of water (ST210), and the operation is stopped (ST300).

Thus, in the parallel operation model in the water supply unit 10, in the case of an independent operation that does not exceed the water supply flow rate of one pump during operation, water supply is performed by variable speed operation on the main unit side. In addition, when parallel operation by the main machine and slave machine is started beyond one water supply flow rate, if the water supply flow rate subsequently decreases, the main engine operating at variable speed stops the small amount of water. Is disconnected. The next activation is performed by switching the main machine and the slave machine.
Therefore, it becomes possible to equalize the operation time and start frequency of each pump, and the reliability of the water supply unit 10 can be improved. Also, by setting the target pressure during parallel operation to be the same as the target pressure during single operation, the performance of the water supply unit during parallel operation can be improved and equivalent to the conventional alternating / parallel water supply unit. .

  In addition, since sensors and electrical components can be configured to be connected to the main integrated control panel 100 by using those of a general single operation unit, the main integrated control panel 100 controls the motor. The inverter part, overload protection part, etc. become unnecessary, and the above simple interrupt signal (operation permission signal or slave operation permission signal and operation detection signal (operation signal, freeze prevention operation permission request signal) or failure signal ( The two first electrical parts 23 and the second electrical part 33 can be controlled by exchanging signals of a failure signal or a pressure drop pause signal, and since only an electrode circuit, an operation panel, and an alarm circuit are required as additional circuits, A simple microcomputer circuit can be manufactured at low cost.

Next, the operation mode in the alternating operation model will be described with reference to the operation flow charts of FIGS. 5A, 5B, and 6. 5A and 5B show a pause detection operation mode due to a pressure drop, and FIG. 6 shows a mode in which anti-freezing operation is permitted. Moreover, in these description, the 1st pump 21 is demonstrated as A pump and the 2nd pump 31 is demonstrated as B pump.
<Pressure drop pause>
As shown in FIG. 5A and FIG. 5B, when the first electrical component 23 and the second electrical component 33 are started to operate, it is always determined whether or not the reset button is ON (ST401), and the reset button is ON (ST401). If YES, the counter is set to 0 (ST402). If the reset button is not ON, the process proceeds to ST403. Control circuit 110 determines a pump to be activated first (ST403). If the pump stopped last time is the B pump, the process proceeds to ST500, and if it is the A pump, the process proceeds to ST600 (ST404).

  When starting the A pump first, the control circuit 110 sends an operation permission signal to the first electrical component 23 and starts variable speed operation of the A pump (ST500). The control circuit 110 detects a failure detection signal from the first electrical unit 23 (ST501). If the failure detection signal is the failure signal ON, it is determined that a failure has occurred in the A pump (ST501 is ON), and the B pump is shifted to a single operation (ST506). If it is a pause signal (flashing) (BL of ST501), it is determined that the A pump has stopped due to a pressure drop for some reason (ST502), and the operation permission signal is turned OFF (ST503). The first electrical unit 23 adds one counter to the internal memory. If there is neither a pause signal nor a failure signal, the process returns to ST500.

  Each time the first electrical component 23 detects a pressure drop, it determines whether the counter exceeds 3 (ST504), and if it exceeds (YES in ST504), it determines that the pressure drop failure has stopped (ST505), and the control circuit 110 A failure signal is sent to. In the control circuit 110, when the failure detection signal is detected from the first electrical component unit 23, the control circuit 110 shifts to the B independent operation (ST506). If the counter does not exceed 3, the first electrical unit 23 stops the pause signal (flashing) after the pause time has elapsed. Further, in the B pump, it is determined whether the feed water flow rate is lower than the stop flow rate (ST511), and if not lower, the process returns to ST510 (NO in ST511). If it falls below (YES in ST511), it stops as a small amount of water (ST512) and returns to ST500.

  When starting the B pump first, the control circuit 110 sends an operation permission signal to the second electrical component 33 and starts variable speed operation of the B pump (ST600). The control circuit 110 detects a failure detection signal from the second electrical component 33 (ST601). If the failure detection signal is a failure signal ON (ST601 ON), it is determined that a failure has occurred in the B pump (ST601 ON), and the A pump is shifted to an independent operation (ST606). If it is a pause signal (flashing) (BL in ST601), it is determined that the B pump has stopped due to a pressure drop for some reason (ST602), and the operation permission signal is turned OFF (ST603). The second electrical component 33 adds one counter to the internal memory. If there is neither a pause signal nor a failure signal, the process returns to ST600.

Each time the second electrical component 33 detects a pressure drop, it is determined whether the counter exceeds 3 (ST604), and if it exceeds (YES in ST604), it is determined that the pressure drop failure has stopped (ST605), and the control circuit 110 A failure signal is sent to. In the control circuit 110, when detecting the failure detection signal from the second electrical component unit 33, the control circuit 110 shifts to the A-only operation (ST606). If the counter does not exceed 3, the second electrical equipment unit 33 stops the pause signal (flashing) after the pause time has elapsed. Further, in the A pump, it is determined whether or not the feed water flow rate is lower than the stop flow rate (ST611), and if not lower, the process returns to ST610 (NO in ST611). If it falls below (YES in ST611), it stops as a small amount of water (ST612) and returns to ST600.
<Anti-freezing operation>
Each electrical component performs anti-freezing operation at a constant rotational speed without sending an operation signal when a low temperature is detected by the temperature sensor and an operation permission signal is given to the interrupt input from the control unit. When no operation permission signal is given to the interrupt input, an intermittent operation signal is sent to the control unit as a freeze prevention operation permission request.

  As shown in FIG. 6, in the state where the operation is not started, either the first electrical component part 23 or the second electrical component part 33 which is permitted to operate by sending an operation permission signal from the control circuit 110 is the temperature sensor 28, 38. When a low temperature (for example, 3 ° C.) signal is detected, it is determined that the start condition for the freeze prevention operation is satisfied, and the freeze prevention operation is started. In the case of the alternating operation model, the control circuit 110 determines a pump to be activated first (ST700). If the pump stopped last time is the B pump, the process proceeds to ST800, and if it is the A pump, the process proceeds to ST900 (ST701).

  When starting the A pump first, the control circuit 110 sends an operation permission signal to the first electrical component 23 (ST800). The control circuit 110 detects an operation detection signal from the first electrical component 23 (ST801).

If the operation detection signal of the first electrical component 23 is the operation signal ON (ST801 is ON), the variable pump operation of the A pump is started (ST810), and it is determined whether the feed water flow rate is lower than the stop flow rate in the A pump. If it does not fall below (ST811 NO), the process returns to ST810. If it falls below (YES in ST811), it stops as a small amount of water (ST812).
In addition, if the operation detection signal of the second electrical unit 33 is the freeze prevention operation permission request signal (flashing) regardless of the operation or stop of the pump of the first electrical unit 23, the first electrical unit that has given the operation permission signal The operation permission signal of the unit 23 is stopped, and the operation permission signal is sent to the second electrical unit 33 that has not given the operation permission signal (ST820). Then, after a predetermined time has elapsed from the previous switching of the driving permission signal (ST821), the process proceeds to ST901 described later. The fixed time is set to a time and rotation speed sufficient for preventing freezing.

  When starting the B pump first, the control circuit 110 sends an operation permission signal to the second electrical component 33 (ST900). The control circuit 110 detects an operation detection signal from the second electrical component section 33 (ST901).

  If the operation detection signal of the second electrical component 33 is the operation signal ON (ST901 ON), the variable speed operation of the B pump is started (ST910), and it is determined whether the feed water flow rate is lower than the stop flow rate in the B pump. (ST911), if not lower (NO in ST911), the process returns to ST910. If it falls below (YES in ST911), it stops as a small amount of water (ST912). If the operation detection signal of the first electrical unit 23 is the freeze prevention operation permission request signal (flashing) regardless of whether the pump of the second electrical unit 33 is operated or stopped, the second electrical unit that has given the operation permission signal. The operation permission signal of the unit 33 is stopped, and the operation permission signal is sent to the first electrical unit 23 that has not given the operation permission signal (ST920). Then, after a predetermined time has elapsed since the last switching of the driving permission signal (ST921), the process proceeds to ST801 described later. The fixed time is set to a time and rotation speed sufficient for preventing freezing.

  Thus, in the alternating operation model in the water supply unit 10, the operation permission signal is sent to one electrical component, and when the operation is stopped, the operation permission signal is given to the other electrical component. Further, when a failure signal of one electrical component is detected, an operation permission signal is sent only to the other electrical component. In addition, when a stop signal is detected from a corresponding electrical component while an operation permission signal is given to one electrical component, it is considered that the corresponding electrical component has transitioned to a sleep state and the other electrical component is permitted to operate. Giving a signal. Accordingly, while one of the single operation units detects a pressure drop and is stopped, the other single operation unit is made to supply water to avoid water cutoff. Also, because two pumps are not allowed to operate at the same time due to power supply capacity restrictions, an operation permission signal is alternately given to two electrical parts in response to a request for permission to prevent freezing, and anti-freezing operation is performed. By implementing, it is possible to avoid freezing without causing a decrease in power supply voltage.

  Further, like the parallel operation model described above, the main integrated control panel 100 does not require an inverter unit, an overload protection unit, or the like that controls the motor, and the above simple interrupt signal (operation permission signal or slave unit operation). Permission signal), operation detection signal (operation signal or anti-freezing operation permission request signal), and failure detection signal (pause signal or failure signal) to exchange the two first electrical parts 23 and second electrical parts 33 Can be controlled. Since only an electrode circuit, an operation panel, or an alarm circuit is required as an additional circuit, a relatively simple microcomputer circuit can be manufactured at a low cost.

  In addition, even in the alternating parallel operation model, when two pumps that are likely to cause anti-freezing operation are both stopped, the operation permission signal is sent only to one of the electrical components, so operation permission is permitted. Even if the other electrical component to which no signal is given detects a low temperature signal from the connected temperature sensor, it cannot start the freeze prevention operation.

  Therefore, when the pump of the electrical equipment unit to which the control unit gives the operation permission signal is stopped, the operation is the same as that of the above-described alternating operation model regarding the freeze prevention operation. Also, when the pump of one of the electrical parts to which the control unit gives an operation permission signal is in operation, the water temperature of the pump in operation is the temperature of the well water, which is much higher than 3 ° C. Since the operation permission signal is sent to the other electrical unit that is on standby for parallel operation, if the temperature sensor detects a low temperature while it is stopped, it freezes at a constant rotation speed without sending an operation signal. Preventive operation can be performed.

The present invention is the addition is not limited to the above embodiments, it is given Ru course der various modifications may be implemented without departing from the scope of the present invention.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A first pump, a first motor that drives the first pump, a first pump unit that has a first electrical component that controls the first motor, a second pump, and a second pump A second motor for driving the pump, a second pump unit having a second electrical component for controlling the second motor, a discharge port of the first pump, and a discharge port of the second pump , The operation signal for detecting the operation state of the first electrical component and the second electrical component, and the failure signal for detecting the failure state are input, and the first electrical component and the second electrical component The operation permission signal can be selectively output to the interrupt input of the unit, and the pump unit different from the pump unit at the previous stop is started by the operation permission signal, and the first electrical unit and the first 2Electrical unit discharges below the stop flow rate When a pressure drop is detected, the failure signal is suspended by the retry function and intermittently transmitted from the electrical component in a state where an operation permission signal is sent to one of the first electrical component and the second electrical component. The water supply unit according to [1], in which a control unit that considers that the operation is stopped due to a pressure drop and that gives an operation permission signal to the other electrical unit is provided.
[2] The first electrical component and the second electrical component do not send an operation signal when a low temperature is detected by a temperature sensor and an operation permission signal is given to the interrupt input from the control unit. When the anti-freezing operation is performed at a constant rotational speed and the operation permission signal is not given to the interrupt input, an intermittent operation signal is sent to the control unit as the anti-freezing operation permission request, and the control The part is in a state where the operation permission signal is sent to one of the first electric part and the second electric part, regardless of the operation or stop of the pump of the electric part given the operation permission signal, When an intermittent operation signal is detected from an electrical component that has not been given an operation permission signal, it is regarded as a freeze-free operation permission request, and the operation permission signal of the electrical component that has been given the operation permission signal is stopped and Water unit as claimed in, it is the [1] and a control unit for sending the operation permission signal to the electrical equipment unit which has not been given a variable signal.
[3] The first electrical component and the second electrical component do not send an operation signal when a low temperature is detected by a temperature sensor and an operation permission signal is given to the interrupt input from the control unit. When the anti-freezing operation is performed at a constant rotational speed and the operation permission signal is not given to the interrupt input, an intermittent operation signal is sent to the control unit as the anti-freezing operation permission request, and the control When the pump of the electrical part to which the operation permission signal is given is stopped, the operation is permitted in the state where the operation permission signal is sent to one of the first electrical part and the second electrical part. When an intermittent operation signal is detected from an electrical part that has not been given a signal, it is regarded as a freeze-free operation permission request, and the operation permission signal of the electrical part that was given the operation permission signal is stopped and an operation permission signal is given. Tena Water unit according to and a controller [1] for sending the operation permission signal to the electrical equipment part Tsu.
[4] The first electrical component and the second electrical component are operated at a constant speed at a maximum rotational speed during pump operation when an operation permission signal intermittent to the interrupt input is given from the control unit, and The control unit sends an operation permission signal to one of the first electric component and the second electric component, which is a main machine, performs variable speed operation of the pump by the one electric component, and the other When an intermittent operation permission signal is sent to the interrupt input of the electrical equipment section as a slave operation permission, and the discharge pressure drops below the starting pressure due to an increase in the amount of water supply, the other electrical equipment section sets the pump at the maximum rotation speed. The water supply according to [1], which operates at high speed and stops the pump and disconnects the parallel operation when it is detected that the amount of water supply has decreased below the stop flow rate by the electrical unit on the one main engine side unit.
[5] The first electric component and the second electric component are provided with a DC power supply unit, and the DC power supply unit supplies power to the control unit. The water supply unit in any one of.

  DESCRIPTION OF SYMBOLS 10 ... Water supply unit, 20 ... 1st pump unit, 21 ... 1st pump, 22 ... 1st motor, 23 ... 1st electrical equipment part, 24 ... Suction pipe, 25 ... Discharge pipe, 26 ... Flow sensor, 27 ... Pressure Sensor, 28 ... Temperature sensor, 30 ... Second pump unit, 31 ... Second pump, 32 ... Second motor, 33 ... Second electrical component, 34 ... Suction pipe, 35 ... Discharge pipe, 36 ... Flow rate sensor, 37 DESCRIPTION OF SYMBOLS ... Pressure sensor, 38 ... Temperature sensor, 50 ... Merge pipe, 100 ... Integrated control panel, 110 ... Control circuit.

Claims (3)

A first pump, a first motor that drives the first pump, and a first pump unit having a first electrical component that controls the first motor;
A second pump, a second motor for driving the second pump, and a second pump unit having a second electrical component for controlling the second motor;
A junction pipe connecting the discharge port of the first pump and the discharge port of the second pump;
An operation signal for detecting an operation state of the first electrical component part and the second electrical component part and a failure signal for detecting a failure state are input, and an operation is performed on an interrupt input of the first electrical component part and the second electrical component part. It has a configuration capable of selectively outputting a permission signal, and starts a pump unit different from the pump unit at the previous stop by the operation permission signal, and the first electrical component and the second electrical component have a stop flow rate. When a decrease in discharge pressure is detected below, the operation is paused by the retry function, and an operation permission signal is sent to one of the first electrical component and the second electrical component from the electrical component. When an intermittent pause signal is detected, it is considered paused due to a pressure drop, and a control unit that gives an operation permission signal to the other electrical unit;
It said first electrical unit and the second electrical component unit, when detecting a low by the temperature sensor, the control unit or, et al., If the operation permission signal to the interrupt input is not given, the control unit, antifreeze An intermittent operation signal is transmitted as an operation permission request, and the control unit gives an operation permission signal in a state where the operation permission signal is transmitted to one of the first electric component and the second electric component. Detects intermittent operation signals from electrical parts that have not been given an operation permission signal either during normal operation of the pumps of the electrical parts that are in operation, when the amount of water is stopped, or after freeze prevention operation for a certain period of time due to low temperature detection In such a case, the operation permission signal of the electrical part to which the operation permission signal was given is stopped and the operation permission signal is sent to the electric part to which the operation permission signal has not been given. Water unit, characterized in that the. A first pump, a first motor that drives the first pump, and a first pump unit having a first electrical component that controls the first motor;
A second pump, a second motor for driving the second pump, and a second pump unit having a second electrical component for controlling the second motor;
A junction pipe connecting the discharge port of the first pump and the discharge port of the second pump;
An operation signal for detecting an operation state of the first electrical component part and the second electrical component part and a failure signal for detecting a failure state are input, and an operation is performed on an interrupt input of the first electrical component part and the second electrical component part. It has a configuration capable of selectively outputting a permission signal, and starts a pump unit different from the pump unit at the previous stop by the operation permission signal, and the first electrical component and the second electrical component have a stop flow rate. When a decrease in discharge pressure is detected below, the operation is paused by the retry function, and an operation permission signal is sent to one of the first electrical component and the second electrical component from the electrical component. When an intermittent pause signal is detected, it is considered paused due to a pressure drop, and a control unit that gives an operation permission signal to the other electrical unit;
It said first electrical unit and the second electrical component unit, when detecting a low by the temperature sensor, the control unit or, et al., If the operation permission signal to the interrupt input is not given, the control unit, antifreeze While intermittently sending an operation signal as an operation permission request, the control unit is one of the first electric unit and the second electric unit when the pump of the electric unit to which the operation permission signal is given is stopped. If an intermittent operation signal is detected from an electrical component that has not been given an operation permission signal while an operation permission signal has been sent to the electrical component, the electrical device that has been given the operation permission signal is regarded as a freeze prevention operation permission request. The water supply unit is characterized in that the operation permission signal of the unit is stopped and the operation permission signal is sent to the electrical unit that has not been given the operation permission signal.   The DC power supply unit is provided in the first electrical component unit and the second electrical component unit, and the DC power supply unit supplies power to the control unit. Water supply unit.