JP5976496B2 - Water supply system - Google Patents

Description

  In the water supply to the water supply group of the building water pipe terminal, the present invention comprises a communication means in the water supply pipe part that can identify the floor height of each hierarchical zone by dividing the water supply group for each hierarchical zone of the building, The present invention relates to a water supply system suitable for pressure control by determining the frequency of shift control or the frequency of shift control and the number of pumps controlled at a constant speed based on this transmission signal.

  The water supply system is a variable speed drive (an inverter is used to drive an induction motor, and a controller for this is used to drive a permanent magnet motor. This controller is also based on an inverter. It is comprised with the pump driven by.

  In recent years, it has begun to be adopted in various systems due to advances in technology of communication means and price reduction. In order to further save energy in the pressure control system of the water supply equipment, communication means are installed in each water supply equipment and water supply equipment of the water supply pipe terminal, and it is necessary for the target water supply equipment by sending and receiving these signals. A direct terminal pressure constant control system is beginning to be proposed in which the amount of water supply and the required water supply pressure are obtained and the pressure is controlled so that the pressure here becomes constant.

  However, if the communication means is provided in the water supply apparatus or all the vicinity thereof, the required water supply amount and the required water supply pressure to the target water supply apparatus can be accurately obtained, but there is a problem that the price of the water supply system is increased.

  As a prior art of a water supply apparatus using a communication means, there is Patent Document 1 (Japanese Patent Laid-Open No. 10-009148). Patent document 1 supplies water to a to-be-supplied water part with a predetermined | prescribed pressure, even if it is a case where piping loss changes when piping pressure is unknown. When a pressure sensor with a transmission function is installed in a faucet with a low water pressure arranged at the farthest position at the highest position, when this faucet is fully opened and the estimated terminal pressure is constant, the required pressure at this faucet is set, A load curve is obtained based on this setting, and the estimated terminal pressure constant control is performed using this load curve.

JP-A-10-009148

  In Patent Document 1, when a plurality of units are controlled as described above, each pump is operated with a margin so that the amount of water is not insufficient in consideration of the difference in characteristics of each pump. Is often consumed. In addition, a pressure sensor with a transmission function is installed at the faucet with the lowest water pressure at the highest position, and when this faucet is opened, the estimated terminal pressure is constant, but the faucet placed in the middle has no transmission function. Therefore, water is supplied with a margin, and there is a risk that wasteful driving power may be consumed. Furthermore, if communication means are provided in all the water supply devices of the water supply pipe terminal, the number of communication means becomes enormous, resulting in a problem of increasing the cost of the water supply system.

  Therefore, the present invention provides the water supply device with functions for specifying the pressure target value, initial inverter frequency (target flow rate), and the number of necessary pumps, and classifies the water supply equipment group of the water supply pipe terminal for each hierarchical zone. It is an object of the present invention to provide a water supply system in which a communication means is provided in a water supply pipe part that can specify a zone, and the above problems are solved.

  In the present invention, in order to reduce unnecessary driving power by adopting direct terminal pressure constant control, the water supply device group of the water supply device and the water supply pipe terminal is divided into hierarchical zones, and the water supply that can specify the height of these floors For example, cable installation work is eliminated by installing wireless communication means, for example, in the tube portions. And the problem that the less pump by the communication time at the time of using wireless communication worsens is solved.

The present invention includes a plurality of pumps, variable speed driving means for operating the pumps at a variable speed, a control device for controlling the variable speed driving means, a water supply pipe pressure sensor attached to a water supply pipe on the discharge side of the pump, In the water supply system comprising a plurality of water supply equipment groups provided at the ends of the water supply pipes of the pump, the water supply equipment groups arranged for each level, and supplying water to the plurality of water supply equipment groups by operating the pump ,
A setting means provided in the control device for setting a pressure target value required by the water supply device group, a flow rate target value, a simultaneous opening / closing coefficient of the water supply device group, and a rotation speed parameter corresponding thereto; The first communication means for transmitting the operation status of the water supply equipment group of the hierarchical zone provided in the water supply pipe part which can classify the water supply equipment group of each hierarchical zone and specify the floor height of each hierarchical zone, and the control A second communication means provided in the apparatus;
When the control device receives a signal from the first communication means, the control device obtains the total flow rate for the water supply device group in the hierarchical zone corresponding to the transmitted first communication means, and the simultaneous opening / closing coefficient of the water supply device group is obtained. Is multiplied by the flow rate target value, and based on this flow rate target value, it is generated as the set pressure target value.
Further, the control device commands the set value of the water supply device group in the hierarchical zone corresponding to the transmitted first communication means to the variable speed drive means, and sets the target pressure value of the set value and the supply pipe pressure sensor. The variable speed driving means is controlled so that the pressure becomes equal.

In the water supply system described above,
When the control device receives a signal from the first communication means, the control device obtains the practical head of the water supply device group having the communication means installed at the highest position among the first communication means transmitted, and the first communication means transmitted The total flow rate is obtained for the group of water supply devices in the hierarchical zone corresponding to the above, and this is multiplied by the simultaneous opening and closing coefficient of the water supply device group to obtain a flow rate target value to obtain a pipe resistance from the flow rate target value. A value obtained by adding a suction total lift to a value obtained by adding the largest required end pressure among the required end pressures of each water supply device to the added value of the resistance is generated as a set pressure target value.

In the water supply system described above,
The control device further includes a storage unit that calculates and stores a pressure target value and a flow rate target value required by each of the water supply devices based on the setting of the setting means, or a rotation speed corresponding thereto.
When the control device receives a signal from the first communication means, it reads out the pressure target value and flow rate target value of the water supply device corresponding to the received signal, or the rotation speed corresponding to the pressure target value, and drives the drive The variable speed driving means is controlled such that the rotation speed is instructed to the means and the pressure target value read from the storage unit is equal to the pressure of the water supply pipe pressure sensor.

In the water supply system described above,
The storage unit stores the inverter frequency determined from the flow rate and pressure based on the pump performance as the rotational speed, and the flow rate target obtained by multiplying the total amount of water discharge corresponding to the water supply group of each hierarchical zone by the simultaneous opening / closing coefficient. Value and pressure target value are stored,
When the control device receives a signal from the first communication means, it reads the flow rate target value corresponding to the transmitted communication means from the storage unit, reads the inverter frequency corresponding to the amount of water from the storage unit, It is characterized by automatically generating a rotational speed corresponding to a flow rate target value at the time of starting.

In the water supply system described above,
Furthermore, a water supply device pressure sensor for detecting the pressure of the water supply pipe in the hierarchical zone is provided at a water supply pipe portion that specifies the floor height of each hierarchical zone, and the first communication means includes the water supply device pressure sensor A signal is transmitted when the open state of the water supply apparatus group is detected.

The present invention relates to a plurality of pumps having a predetermined maximum flow rate, drive means for controlling the plurality of pumps at constant speed control and shift control, a control device for controlling the drive means, and a water supply pipe on the discharge side of the pump A water supply pipe pressure sensor and a plurality of water supply equipment groups arranged at the end of the water supply pipe of the pump and arranged at each level, and the pump is operated at a constant speed and a variable speed. In the water supply system for supplying water to the plurality of water supply appliance groups,
Parameters provided by the control device, such as a flow rate target value, a pressure target value, a simultaneous opening / closing coefficient of the water supply device group, a rotation speed corresponding to these, and a required number of pumps. Setting means for setting, and a first communication that is provided in a water supply pipe part that can divide the plurality of water supply device groups for each hierarchical zone and specify the floor height of each hierarchical zone, and transmits the operation status of the water supply device group Means and second communication means provided in the control device,
When the signal from the first communication means is received by the second communication means, the control device simultaneously opens and closes the total flow rate target value of each water supply device group in the hierarchical zone corresponding to the transmitted first communication means. Multiply the coefficient to obtain the maximum load flow rate. Based on this maximum flow rate, obtain the pressure target value.
Further, the control device obtains the number of pumps to be operated at a constant speed and the surplus water amount from the maximum flow rate of the load and the maximum flow rate of the pump, obtains an initial speed of the pump corresponding to the surplus water amount, and determines the number of pumps and the initial speed. Is controlled at a constant speed, and the pump corresponding to the excess water amount is controlled so that the detected pressure of the water supply pipe pressure sensor becomes the pressure target value. It is characterized by doing.

In the water supply system described above,
The maximum water volume of the load is divided by the maximum water supply volume of the pump, and the quotient is the number of pumps controlled at a constant speed, and the remainder is the remaining water volume.

In the water supply system described above,
The control device includes a storage unit that stores a maximum flow rate of the load, a target pressure, the number of pumps, a surplus water amount, and an initial pump speed based on the setting of the setting unit, and a signal from the first communication unit. Is received by the second communication means, the required number of pumps corresponding to the received signal and the initial speed of the pump are read from the storage unit and commanded to the drive means.

In the water supply system described above,
The flow rate target value and the target pressure value corresponding to each of the water supply devices are determined in advance as parameters, and the number of operating units and the initial speed commanded to the driving means are associated with each other by the flow rate target value and the pressure target value. It is characterized by that.

The present invention includes a variable speed drive means for variable speed operation of a plurality of pumps, a control device for controlling the variable speed drive means, and a plurality of water supply equipment groups provided at the ends of the water supply pipes of the pumps. In a water supply system for supplying water to the plurality of water supply equipment groups by variable speed operation,
Setting means provided in the control device for setting a target pressure value, a flow rate target value, a simultaneous opening / closing coefficient of the water supply device group, and a rotation speed corresponding to the pressure target value required for the water supply system for each of the water supply devices. And a storage unit that stores these set values, and a water supply pipe that is provided in a water supply pipe part that can divide the plurality of water supply equipment groups into hierarchical zones and specify the floor height of each hierarchical zone, and detects this pressure. An instrument group pressure sensor and first communication means for transmitting the pressure state; and second communication means provided in the control device;
When the water supply device group pressure sensor detects the open state of the water supply device group, the first communication means transmits, and when the control device receives a signal from the communication means, the control device receives the signal at the highest position. Select a water supply pressure sensor installed at a distance, send a pressure detection data transmission command to the communication means to which the selected water supply pressure sensor is attached, and supply water corresponding to the reception signal based on this transmission command The pressure target value and rotation speed of the appliance are read from the storage unit, the rotation speed is commanded to the variable speed drive means, and the water supply appliance group pressure sensor installed farthest from the pressure target value and the highest position The variable speed driving means is controlled so as to be equal to the pressure.

In the water supply system described above,
The rotational speed commanded to the variable speed drive means is determined in advance for a predetermined amount of water (flow rate target value) and a predetermined total head (pressure target value) corresponding to a plurality of water supply equipment groups. It is characterized by being associated with the flow rate target value.

The present invention relates to a plurality of pumps having a predetermined maximum flow rate, drive means for controlling the plurality of pumps at constant speed control and shift control, a control device for controlling the drive means, and a water supply pipe on the discharge side of the pump In a water supply system comprising a plurality of water supply equipment groups provided in the water supply system for supplying water to the plurality of water supply equipment groups by operating a pump at a constant speed and a variable speed,
Parameters provided by the control device, such as a flow rate target value, a pressure target value, a simultaneous opening / closing coefficient of the water supply device group, a rotation speed corresponding to these, and a required number of pumps. A setting means for setting, and a water supply pressure sensor for detecting the operation status of the water supply group provided in a water supply pipe part that can classify the plurality of water supply groups for each hierarchical zone and specify the floor height of each hierarchical zone; The first communication means for transmitting the operation status of the water supply device, and the second communication means provided in the control device,
When the signal from the first communication means is received by the second communication means, the control device multiplies the value obtained by summing the flow rate target values of the water supply devices corresponding to the received signal by the simultaneous opening / closing coefficient to maximize the load. The flow rate, the target pressure value is obtained from this, the number of pumps to be controlled at a constant speed from the maximum water amount of the load and the maximum water amount of the pump and the surplus water amount are obtained, the initial speed of the pump corresponding to this surplus water amount is obtained, and the number of pumps By instructing the initial speed to the drive means, constant speed control of the determined number of pumps and shift control of the other pumps so that the detected pressure of the water supply device pressure sensor becomes the target pressure value of the load. Features.

In the water supply system described above,
The maximum water volume of the load is divided by the maximum water supply volume of the pump, and the quotient is the number of pumps controlled at a constant speed, and the remainder is the remaining water volume.

In the water supply system described above,
The control device includes a storage unit that stores a maximum flow rate of the load, a target pressure, the number of pumps, a surplus water amount, and an initial pump speed based on the setting of the setting unit, and a signal from the first communication unit. Is received by the second communication means, the required number of pumps corresponding to the received signal and the initial speed of the pump are read from the storage unit and commanded to the drive means.

In the water supply system described above,
The flow rate target value and the target pressure value corresponding to each of the water supply devices are determined in advance as parameters, and the number of operating units and the initial speed commanded to the driving means are associated with each other by the flow rate target value and the pressure target value. It is characterized by that.

According to the present invention, by using the simultaneous opening / closing coefficient K to calculate the amount of water used in each zone, the amount of water used can be calculated appropriately, and the number of water supply device pressure sensors and first communication means installed can be reduced. Therefore, energy saving operation of the pump, water saving, and cost reduction of the system can be achieved. Furthermore, since it can be realized simply by adding a simple configuration to the existing system, the function of the water supply system can be improved at a low cost.

  Further, in the present invention, corresponding to (the floor height is specified) of the water supply device and the water pipe terminal, the load is obtained by adding the simultaneous opening / closing coefficient to the flow rate obtained by adding the desired flow rate to each water supply device for each level. The maximum flow rate and the target pressure value are determined, and when the unit can be operated from the maximum water amount of the load and the maximum water amount of the pump, or when it is covered by a variable speed pump, the initial speed of the variable speed pump is obtained and each water supply device or For example, a wireless communication means is provided in the vicinity of this, and the water supply device side is provided with a function to set and output the required number of pumps, pressure target value, initial inverter frequency (target flow rate), etc. For example, a wireless communication means is provided in a water supply pipe part that can be classified for each zone and the hierarchical zone of this can be specified, and the state that each water supply device is opened is transmitted to the water supply device by, for example, wireless communication, and based on this, the required number of pumps ,Eye Set the pressure and initial inverter frequency (target flow rate), command the operation and control the pressure so that it is equal to the target pressure value by the pressure sensor attached to the pump discharge side. Useless driving power can be reduced. Moreover, these control operations can be performed quickly.

The water supply system figure of the water supply system of this invention Example. Explanatory drawing which similarly shows the amount of water used with respect to the water supply device at the time of opening of the water supply device on each floor of the apartment house, the actual head, pipe resistance, required terminal pressure, total head, and inverter frequency. The pump driving | operation characteristic figure which shows the driving | running state of multiple pumps similarly when each water supply apparatus is open | released. The block diagram of the water supply apparatus of the several pump of this invention Example. Each part of piping of each floor of the apartment house shown in FIG. 1, and LOSS calculation explanatory drawing. Explanatory drawing which shows a calculation result. The main flowchart of operation | movement of this invention Example. The flowchart of the interruption process of operation | movement similarly. The flowchart which similarly calculates the actual head Ha of the water supply apparatus of each floor, and stores it in a memory | storage part. Similarly, the flowchart of the process which calculates piping resistance, and the process which calculates | requires the maximum amount of water used. The flowchart which similarly shows the process which calculates | requires a total head, the number of driving | operations, and a surplus water amount. The flowchart which similarly shows the process which calculates | requires the total head. The flowchart which similarly shows the process which calculates | requires an inverter initial frequency from excess water amount. The pump operation characteristic figure which similarly explains an inverter initial frequency. Explanatory drawing which similarly shows the relationship between water quantity and inverter frequency. Explanatory drawing which similarly shows the map of the memory | storage part of this invention Example.

  The form for implementing this invention is demonstrated about the Example of a water supply apparatus using FIGS. 1-16.

  FIG. 1 is a water supply system diagram of a water supply apparatus according to an embodiment of the present invention, and a water supply target is a five-story apartment house as an example. Reference numeral 1 denotes a water source. In the present embodiment, an example in which a water receiving tank is used is shown, but the water source may be a water distribution pipe without using this, and is not limited to the water receiving tank. 2 is a suction pipe, 3 is described in detail later, but sucks water from the suction pipe 2 and supplies water to each water supply device group (load, faucet) at the terminal of the water supply pipe through the water supply pipe 4 on the discharge side. It is a device (PU), and its control device (described later) includes wireless communication means (second communication means) 0t.

  Reference numerals 1a to 1e denote a group of water supply devices (load, faucet) belonging to the first-floor zone attached to the end of the branch pipe divided by the first-floor zone from the rising portion of the water supply pipe 4. Similarly, 2a to 2e, 3a to 3e, 4a to 4e, and 5a to 5e are water supply apparatus groups of water pipe terminals attached to the second floor zone, the third floor zone, the fourth floor zone, and the fifth floor zone, respectively. .

  1P is a water supply pressure sensor attached to one water supply pipe part (near the root of the branch pipe divided by the first floor zone) that specifies the floor height of the first floor zone. This water supply equipment pressure sensor 1P detects the pressure fluctuation of the branch pipe and specifies the height of the first floor zone when at least one of the water supply equipment groups 1a to 1e belonging to the first floor zone is opened. Output a signal. Thus, the opening operation of each water supply apparatus group of the zone of the said floor can be detected with one water supply apparatus pressure sensor. Therefore, it is only necessary to install one water supply device pressure sensor in each floor zone, so that the cost of the system is reduced.

  In addition, the water supply appliance pressure sensor 1P can use the detected value as pressure data, or can use it as an open / close signal of the water supply appliance. When simply used as an open / close signal, a pressure switch may be used instead of the pressure sensor.

  2P, 3P, 4P, and 5P are water supply device pressure sensors attached to water supply pipe portions that specify the height of the second floor zone, the third floor zone, the fourth floor zone, and the fifth floor zone, respectively, The water supply device groups 2a to 2e, 3a to 3e, 4a to 4e, and 5a to 5e that belong to this zone.

  1t is a wireless communication means (first communication means) attached to one water supply pipe part that specifies the floor height of the first floor zone, and at least one of the water supply devices 1a to 1e is opened. When the appliance pressure sensor 1P detects, a signal indicating the height of the first floor zone and the opening operation of the water supply appliance is transmitted wirelessly. Similarly, 2t, 3t, 4t, and 5t are wireless communication means (first communication means) attached to the water supply pipe portions that specify the height of the second floor zone, the third floor zone, the fourth floor zone, and the fifth floor zone, respectively. Then, a signal indicating the height of the corresponding floor zone and the opening operation of the water supply device is transmitted. These pressure sensors and wireless communication means may be integrated, or may be attached separately to correspond to the positions described above. As described above, the number of the water supply device pressure sensors and the first communication means to be installed is one for each floor zone, so that the cost of the system is reduced. And by these radio | wireless communication means, information is exchanged between the said water supply apparatus 3 and each hierarchical zone (it takes charge of the water supply apparatus group which belongs to each zone).

  Further, Q10 to Q14, Q20 to Q24, Q30 to Q34, Q40 to Q44, and Q50 to Q54 added to the codes of the respective water supply device groups are the water supply devices attached to the first floor zone to the fifth floor zone, respectively. The amount of water discharged when the opening operation is performed, and the amount of water discharged varies depending on the type of water supply apparatus used.

  The wireless communication means 1t to 5t may be wired communication means, and can communicate by placing a transmission signal on a carrier wave through a common wire. And you may comprise FIG. 1 by adding a water supply appliance pressure sensor and a 1st communication means to the existing system.

Now, the water supply calculation and the method for selecting the pump of the water supply device 3 will be described. A pump is selected that satisfies the maximum amount of water used for the load (Q0) and the total head (H00). Exemplifying FIG. 1, Q0 is obtained by the following equation (1).
Q0 = {(Q10 + Q11-Q14) + (Q20 + Q21-Q24) + (Q30 + Q31-Q34) + (Q40 + Q41-Q44) + (Q50 + Q51-Q54)} × K (1)
[Q10 + Q11 to Q14 indicate Q10 + Q11 + Q12 + Q13 + Q14. ]
Here, K is a simultaneous opening / closing coefficient of the water supply device. Since all the water supply devices are not opened at the same time, the amount of water used is obtained by multiplying the total water amount of all the water supply devices by the simultaneous opening / closing coefficient K. In addition, the simultaneous opening / closing coefficient K is used to calculate the maximum amount of water used in each floor zone. That is, the sum total of the water discharge amount of the water supply device group in each floor zone is obtained, and this sum is multiplied by the simultaneous opening / closing coefficient K, and the value is used as the amount of water used in the floor zone. For example, when a signal is generated in the communication means 5t in the fifth floor zone, it is impossible to determine which of the water supply device groups Q50, Q51 to Q54 is open. This is the amount of water used in the 5th floor zone.

Thus, by calculating the amount of water used in each floor zone using the simultaneous opening / closing coefficient K, the number of water supply device pressure sensors and the first communication means installed is only one for each floor zone. Accordingly, the amount of water used can be calculated appropriately with the simultaneous opening / closing coefficient K, and the number of water supply device pressure sensors and the first communication means can be reduced. Cost can be reduced. Furthermore, since this system can be realized simply by adding a simple configuration to the existing system, the function of the water supply system can be improved at a low cost.

The total head H00 is obtained by the following equation (2). A description will be given by taking a water tank method as an example.
H00 = Ha + Hf + Hp−Hs (2)
Here, Ha is the actual head, and indicates the actual height from the water absorption surface of the water receiving tank 1 to the highest water absorption apparatus. Hf is the pipe resistance, the resistance when the maximum amount of water used Q0 is supplied, Hp is the required end pressure head, and the required end pressure head of the water supply terminal (generally about 10 m is used) Hs. Is the total suction head, minus if the water absorption surface is higher than the pump suction center (in this example), plus if it is lower.

  The pump is selected according to the above formulas (1) and (2). Moreover, how to obtain this is generally shown in a building equipment handbook, an air-conditioning sanitary engineering handbook, and the like. Conventionally, the discharge pressure constant control or the terminal pressure constant control is performed according to the change in the amount of water used, based on the total head H00 obtained by the equation (2). Therefore, as described in the prior art, energy is wasted.

  2 shows the amount of water used (Q0x) for the water supply device when the water supply device group of each floor zone in the apartment house shown in FIG. 1 is opened, and the actual head, pipe resistance, required end pressure, total head, inverter This is a summary of the relationship with frequency.

  For example, assuming that the water supply device 1a is opened in the first floor zone, the pressure sensor 1P is activated and the communication means 1t transmits. For the actual water discharge amount Q10 of the water supply device 1a, the calculated water consumption is {Q10 + Q11 to Q14} xK, the actual head is H1a-HS (see FIG. 1), and the pipe resistance is H1f ({Q10 + Q11 to Q14} xK). It is. That is, the pipe resistance is the pipe resistance when the calculated water usage amount {Q10 + Q11 to Q14} xK is caused to flow through the water supply pipe branch pipe (water supply device) in the first floor zone. The required end pressure HP and the total head H01 ({Q10 + Q11 to Q14} xK) mean that H1a-HS + H1f + HP and the inverter frequency is f1. The total head H01 becomes a pressure target value.

By the way, as described above, when only the water supply device 1a is opened, the amount of water used for calculation is increased to {Q10 + Q11 to Q14} xK with respect to the actual water discharge amount Q10, but on the safety side, there is no practical problem. It is about. This safety factor is the simultaneous opening / closing coefficient K.

  Similarly, assuming that the water supply devices 2a, 3b, 3e, 4c, and 5e in the second floor zone, the third floor zone, the fourth floor zone, and the fifth floor zone are opened, the actual water discharge amount is Q20 + Q31 + Q34 + Q42 + Q54. The amount of water used is {{Q20 + Q21 to Q24} + {Q30 + Q31 to Q34} + {Q40 + Q4 to Q44} + {Q50 + Q51 to Q54}} × K, which is larger than the actual water discharge amount as described above, but on the safe side. .

  Furthermore, the actual head is Ha (= H2a + H3a + H4a + H5a-HS) (see FIG. 1), and the pipe resistance is H25f ({{Q20 + Q21-Q24} + {Q30 + Q31-Q34} + {Q40 + Q4-Q44} + {Q50 + Q51-Q54}} × K), and the water supply amount {{Q20 + Q21 to Q24} + {Q30 + Q31 to Q34} + {Q40 + Q4 to Q44} + {Q50 + Q51 to Q54}} × K ) Shows the pipe resistance when flowing.

  The required end pressure is HP, the total head H025 ({{Q20 + Q21 to Q24} + {Q30 + Q31 to Q34} + {Q40 + Q4 to Q44} + {Q50 + Q51 to Q54}} × K) is Ha (= H2a + H3a + H4a + H5a−HS) + H5f ({ {Q20 + Q21 to Q24} + {Q30 + Q31 to Q34} + {Q40 + Q4 to Q44} + {Q50 + Q51 to Q54}} × K) + HP, which means that the inverter frequency is f25.

Other than this, the explanation is omitted because it is clear from the above explanation. The method of obtaining the pipe resistance of each part is as shown in FIG. 5 (system diagram) and FIG. 6 (table). In FIG. 5, the part L1 is a loss head of the straight pipe part of the water supply pipe 4, and is based on, for example, Darcy's formula, that is, the following equation (3).
The calculation process in the middle is omitted, and the result is shown in FIG. 6 (table) as LOSS1.
(0.02 + 0.0005 / D) × (V 2 / 2g) × (L / D) (3)
Here, D is the straight pipe inner diameter (m), V is the flow velocity (m / sec) of the fluid flowing through the straight pipe, L is the straight pipe length (m), and g is the acceleration of gravity (m / sec ² ). It is. The part L2 is a loss head of the bent pipe part and is according to the following equation (4).
Again, the calculation process in the middle is omitted, and the result is shown in FIG. 6 (table) as LOSS2.
(V ² / 2g) × φ (4)
Here, φ is a loss coefficient due to the shape of the curved pipe.

  As described above, the loss head of the water supply pipe is calculated by the above-described method in each of the portions L3 to L17 (FIG. 5) and is shown in FIG. 6 (table). These results are stored in the memory (storage unit). ) May be stored in advance, or each time, calculation processing may be performed by a program described later. These calculation methods are generally shown in the aforementioned building equipment handbook, air-conditioning sanitary engineering handbook and the like.

  FIG. 3 is a pump operation characteristic diagram showing an operation state when each water supply device group exemplified by two pumps is opened, in which the horizontal axis indicates the amount of water and the vertical axis indicates the total head. Here, a point O0 indicated by a triangular corner indicates a specification point that satisfies the maximum water usage Q0 and the total head H00 shown in the equations (1) and (2). And the pump is a water supply device comprising two pumps having a Q-H performance satisfying the water volume Q0 / 2 and the total head H0 when operating one unit, that is, a pump having a curve A under the inverter frequency f0. Selected. When this is operated in parallel under the inverter frequency f0, the above-mentioned specification point can be satisfied. A performance curve obtained by synthesizing the curve is a curve T.

  Curve A shows that the above-mentioned specification point (Q0 / 2, H0) is satisfied under the inverter frequency f0. Further, the shaft power (motor output) at this time is S0 at the intersection with Q0 / 2 on the curve F (the inverter frequency is under f0). Further, on the vertical axis of the water amount 0, a point O5 of the actual lifting height Ha + the required end pressure HP is shown.

  A straight line L passing through the point O5 and the point O0 'in the middle and connecting the above-mentioned specification point O0 is a pipe resistance curve. As the piping resistance curve L, a quadratic curve or the like is used. The curve M satisfies the actual lifting height Ha + required end pressure HP (point of water volume 0) under the inverter frequency f5, the shaft power curve at this time is G, and the shaft power is S5.

  For reference, controlling the constant inverter frequency on the straight line N so that the feed water pressure becomes equal to the total head H0 as the amount of water used varies is called constant discharge pressure control. Further, controlling the inverter frequency so that the supply water pressure is on the piping resistance curve L as the amount of water used varies is called constant terminal pressure control.

  Now, when only the water supply device 1a belonging to the first floor zone is operated and opened, the amount of water discharged from the water supply device 1a is Q10, but the calculated water consumption is {Q10 + Q11 to Q14} xK, and the total head is H01. As described above, the frequency corresponding to this is f1 (see FIG. 2). When this is shown in FIG. 3, the QH performance curve is B, the operating point is O1, the shaft power curve is H, and the shaft power at this time is S1. This is because the shaft power is remarkably reduced from the minimum value S5 of the shaft power when the terminal pressure constant control is performed as described above.

  That is, when the water supply device 1a is opened, for example, the wireless communication means 1t corresponding thereto transmits a signal, and when this is received by the wireless communication means 0t provided in the water supply device 3, the target pressure is set to the total head H01. The shaft power can be remarkably reduced by operating the pump motor at the inverter frequency f1 and performing the discharge pressure constant control so that the feed water pressure becomes the target pressure H01.

  Similarly, when the water supply devices 1b, 1c, 2a, 2b belonging to the first floor zone and the second floor zone are opened, the water discharge amount is Q11 + Q12 + Q20 + Q21, but the calculated water use amount is {{Q10 + Q11-Q14} + {Q20 + Q21 ~ Q24}} × K and the total head is H012. The corresponding frequency is f12, the pump QH performance curve is E, the shaft power curve is J, and the shaft power is S12.

  Next, a description will be given of the operation of two units. When the water supply devices 1a, 3a, 3b, 4a, 5a belonging to the 1st floor zone, 3rd floor zone, 4th floor zone, and 5th floor zone are opened, the water discharge amount of the water supply device group is Q10 + Q30 + Q31 + Q40 + Q50, The amount of water used is {{Q10 + Q11 to Q14} + {Q30 + Q31 to Q34} + {Q40 + Q41 to Q44} + {Q50 + Q51 to Q54}} × K, and the total head is H015. The frequency corresponding to this is f15 (one of them is f0, the other is f0, the other is f9), the pump QH performance curve is S, the shaft power curve is W, and the shaft power is S14.

  When the water supply devices 1a, 2a, 3a, 3b, 4a, 5a, 5b belonging to the 1st floor zone, 2nd floor zone, 3rd floor zone, 4th floor zone and 5th floor zone are opened, the water discharge amount of the water supply device is Q10 + Q20 + Q30 + Q31 + Q40 + Q50 + Q51 Although the total head is H00, the frequency corresponding to this is f0 (two units operation), and the pump QH performance curve is T. Since the shaft power curve and shaft power are clear from the above description, the display and description are omitted.

  In this way, the wireless communication means (second communication means) of the water supply apparatus 3 receives the signal transmitted from the corresponding wireless communication means (first communication means) that specifies the height of each floor of the water supply equipment group, The target pressure, inverter frequency, and number of pumps are determined and the pump motor is operated.

  FIG. 4 shows a system configuration diagram of a water supply apparatus having two pumps according to the embodiment of the present invention. 2 is a suction pipe connected to a water source, 2-1, 2-2, 2-3, 2-4 are gate valves, 3-1, 3-2 are motors 6-1, 6-2 (in this embodiment, Driven by an induction motor, but may be a permanent magnet motor), and discharges water from the water source to the discharge pipe 4 through the suction pipe 1. 3-2 is called Unit 2). Reference numerals 5-1 and 5-2 denote check valves for the No. 1 and No. 2 systems, respectively, and 8 denotes a pressure sensor (feed pipe pressure sensor) that detects the pressure of the feed water pipe 4 and outputs an electric signal S3 corresponding thereto. is there. Reference numeral 7 denotes a pressure tank that holds air therein, and reference numerals 9-1 and 9-2 denote a first machine system and a second machine system flow switch (FLSW) that generate signals S1 and S2, respectively, when an extremely small amount of water is detected.

  PW is a power source, ELB1 and ELB2 are Unit 1 and Unit 2 leakage breakers, respectively, and perform short circuit and leakage protection. INV1 and INV2 are drive means (variable speed drive means) for performing constant speed control and shift control of the motors of the first and second machine systems, respectively. The drive means INV1 and INV2 include operators CONS1 and CONS2 having various settings, operations, and display units, respectively, and input terminals for inputting operation command signals Run1 and Run2 and frequency command signals F1 and F2, respectively. When these command signals are input, the operation is started, and arrival frequency signals F10 and F20 indicating that the frequency command signals F1 and F2 have been reached are output.

  Electric power corresponding to the frequency command signals F1 and F2 (frequency and voltage are determined by the command frequency) is supplied to the motors 6-1 and 6-2. For the sake of simplicity, the frequency arrival signals F10 and F20 may be omitted and may be combined with the frequency command signals F1 and F2, or the operation command signals Run1 and run2 may be omitted and combined with the frequency command signals F1 and F2. May be. R and S are control power supplies, and SS is an operation switch. When closed, a control unit CU, which will be described later, is connected to the control power supply and opened when opened. TR is a transformer and supplies a low-voltage control power to the control unit CU.

  The CU is a control device that controls the drive means INV1 and INV2. The CPU is a microprocessor, and Ot is a wireless communication means (second communication means). The wireless communication means (first communication means) attached to the water supply pipe portion that specifies the floor height of the water supply device group of the terminal is used to Give and receive. M is a storage unit (memory) composed of an EEROM (or flash memory), a RAM, and the like, and parameters such as a pressure target value, a flow rate target value, a simultaneous opening / closing coefficient K, a rotational speed (frequency), and the number of pumps, which will be described later, Water usage data (actual head, resistance, required end pressure, total head) of each part, data obtained by exchanging signals with the wireless communication means of the terminal, a program for controlling operation, and the like are stored. I / O is an input / output circuit section provided in the control unit CU, from which external signals are taken into the CPU.

  The CONS 3 is setting means (console) having a display unit (for example, display of frequency, voltage, current, etc.) and an operation unit (for example, a tact switch). The setting means CONS3 includes parameters such as the aforementioned pressure target value, flow rate target value, simultaneous opening / closing coefficient K, rotation speed (frequency), number of pumps, water utilization data (actual head, resistance, required end pressure, total head) of each part. ) Is input and stored in the storage unit M. The setting means is also used as an operator to input signals for operation, stop, etc. (for example, a tact switch at the key operation unit).

  The signal S3 of the water supply pipe pressure sensor 8 and the signals S1 (consisting of S and 10) and the signal S2 (consisting of S and 11) of the flow rate switches 9-1 and 9-2 are transmitted from the control unit CU. The data is taken in from the input / output circuit unit I / O and stored in the memory M as data. Further, when a starting condition described later is satisfied, the control unit CU outputs a signal for turning on the relays Run1 and Run2 from the input / output circuit unit I / O, and outputs the frequency command signals F1 and F2 to the driving means INV1 and INV2. To do.

  7 to 13 are flowcharts showing the control procedure and processing by the control unit CU. FIG. 14 is a diagram showing the relationship between pump performance, frequency and water volume to show how to determine the initial frequency, and FIG. FIG. 16 shows a memory map showing the table.

  In FIG. 7, an interrupt prohibition process D1 is executed in 700 steps in preparation for the initial process of the next 701 steps, for example. In the initial process of step 701, various initialization processes such as a register, an interrupt vector, a memory, a stack pointer, and a transmission / reception process of wireless communication means are executed to prepare for activation.

  Then, in step 702, the parameters shown in the memory map of FIG. 16 are initialized if they need to be initialized, and the fixed data is fixed data, which is stored at the address of the storage unit M. Here, parameters used for pressure control are Q0X (maximum amount of load water, amount of water used), Qmax (maximum amount of water per pump), Qama (excess water amount), NX (number of pumps operated), Hax (actual head) ), Hfx (pipe resistance), H0x (total head), fstart (inverter initial frequency), and the like are stored as design values (data) in the RAM of the storage unit.

  In step 703, an interrupt permission process EI is executed in preparation for various interrupt processes to be described next. In step 704, an interrupt wait process (a process for waiting for the end of various interrupt processes) is performed, and after the interrupt process ends, the process proceeds to step 705. . In the interrupt permission process EI in step 703, an interrupt process described below is executed.

  In interrupt processing (A) and (B) of FIG. 8, it is determined in step 803 of processing A whether or not the parameter setting key of the setting means CONS3 has been pressed. Here, in order to stabilize the operation state of whether or not it is in the parameter setting processing state, for example, when both the up and down keys are pressed and held down, the process proceeds to step 805 of the parameter reading setting processing and is pressed again. At this time, the display process corresponding to the key switch of step 804 is executed after exiting from here, and the process goes to step 809.

  In step 805, the above-described parameters Q0X (maximum load water volume, used water volume), Qmax (maximum water volume per pump), Qama (remaining water volume), NX (number of pumps operated), Hax (actual head), Hfx ( (Piping resistance), H0x (total head), fstart (inverter initial frequency), etc. are set and stored in predetermined memories M100 to M106 of the storage unit M, respectively.

Further, although not described in detail, fixed data such as the simultaneous opening / closing coefficient K is also stored in M _0- of the memory E ² ROM by this processing. The simultaneous opening / closing coefficient K is provided with a plurality of types having different values. That is, since the amount of water used in each house varies depending on the time of day and day of the week, the amount of water used in calculation is calculated using a large coefficient for the time of day and day of the week when there is a large amount of use. By using such a simultaneous opening / closing coefficient, a finer amount of water to be used is calculated, so that energy saving of the pump operation can be achieved.

  The above parameter changing process is an interrupt process, and even during the operation of the main flowchart of FIG. 7, the setting can be changed as needed. The same applies to other interrupt processing.

  In step 812 of the interrupt process B in FIG. 8, transmission / reception processing of the wireless communication means is executed, and reception data from the terminal is stored in the storage unit M. That is, the data of the wireless communication means is stored in, for example, M108 to M111 of the memory RAM. When the water supply device group of the water supply pipe terminal is open, an open signal is issued (transmitted) from each wireless communication means attached to the water supply pipe part that identifies the floor height to which it belongs, and the water supply device is closed In this case, no release signal is issued from each wireless communication means.

For example, when the wireless communication means is notified, 00H data is written in the memory M, and 0FF data is written when the wireless communication means is not notified (M108 to M111). Correspondingly, data on the amount of water used in each hierarchical zone water supply device group is written in advance in, for example, M0 to M10 of the memory E ² ROM (M0 is the total water discharge amount of the first floor zone water supply device group,... M10 is the total water discharge amount of the 5th floor zone water supply equipment group). That is, when a signal from the wireless communication unit 1t is received, it means that one of the water supply devices belonging to the first floor zone has been opened, and 00H data is written in the memory M108. And the data (Q10 + Q11 + ... Q14) of the total discharge amount (water discharge amount) of the water supply device group corresponding to this is read from the memory M0, and the simultaneous opening / closing coefficient K (M11 is stored in the read data). The calculation result is written in the memory M125 as the first-floor zone use water amount. The processing for preserving the amount of water used in the 2nd to 5th floor zones is the same, so the explanation is omitted.

  In step 813, the detection process of the feed water pressure of the feed pipe 4 by the pressure sensor 8 (the detection result is stored in the register AN0) and the detection process of the inverter frequencies F10 and F20 are executed. Data on AN0 is stored in M107 of the storage unit, and data on inverter frequencies F10 and F20 are stored in M131 and M132, respectively. The value stored in the memory RAM is used as a variable. Here, the process of writing data to the memory EEPROM can be performed in advance by another process.

  In addition, Q0X (maximum amount of load water, amount of water used), simultaneous open / close coefficient K, Hax (actual head), Hfx (piping resistance), H0x (total head) so that it is not necessary to set parameters again when power is restored. ), Fstart (inverter initial frequency), etc., the same data as that stored in the RAM is also stored in the EEPROM. In this way, since the parameters are stored in the EEPROM at the time of power failure recovery, it is possible to operate without any trouble.

  In the interruption process of FIG. 9, it is checked in steps 901 to 910 whether the water supply devices in the first to fifth floor zones are open, the actual lifting height Ha is calculated, and the result is stored in the memory M101. In other words, in step 901, a check is made as to whether or not any of the first-floor zone water supply devices is open. If yes (Yes), the actual height H1a of the first floor (memory) (Read from M21) is added (replaced if Ha is 0), stored in the memory M101, and proceeds to the next step 904. If it is not released in step 901 (No), in step 903, a process of storing 0 in Ha as much as practical is executed, and the process proceeds to the next step 904.

  Similarly, in step 904, a check is made as to whether or not any of the second-floor water supply devices are open, and if they are open, in step 905, the actual lifting height Ha (in this case, the practical range Ha is not included). , H1a is stored) is added to the actual height H2a of the second floor (read from the memory M22), and the process proceeds to the next step 906. At this time, the value of the actual head Ha is H1a + H2a if Ha is H1a, and H2a if Ha is 0. If not released in step 904, the process proceeds to the next step 906 without processing. At this time, the value of the actual lifting head Ha is H1a if Ha is H1a, and is 0 if Ha is 0.

  The subsequent operations from the third floor to the fifth floor are the same as described above, and will not be described. However, when the processing of 911 is completed, the interrupt is terminated by RETI, and the processing returns to the main processing of FIG. The data on the actual heights of the first to fifth floors are appropriately added according to the open state of the water supply equipment group in each floor zone, and the sum of these is stored in the memory M101 as the actual lifting height Hax.

  The interrupt process of FIG. 10 shows a process for obtaining the maximum amount of water used (the maximum flow rate of the load) and a process for calculating the pipe resistance. First, a case where water is used on all floors of the first floor zone to the fifth floor zone will be described. In step 101, a check is made as to whether a signal has been received from each of the wireless communication means installed in the water supply pipe site that identifies the fifth floor zone. If received, proceed to the next 102 steps. If not received, the process proceeds to step 118 and thereafter.

In step 102, the amount of water supply (= amount of water used) in the fifth floor zone is obtained. Data of the wireless communication unit 5t is stored in the memory M111. Of course, since the signal is issued, the data is 00H. If it is 00H, the amount of water used is calculated by multiplying the total discharge amount of the water supply device group in the fifth floor zone written in M10 by the simultaneous opening / closing coefficient K from the memory of the E ² PROM. Is stored) and stored in the memory M100 as the maximum amount of water used (the total amount of water required for the group of water supply devices) Q0X.

  In step 103, the pipe resistance of the fifth floor zone at the maximum water usage Q0X is calculated and obtained. Here, for convenience, it is assumed that the maximum water consumption Q0X is supplied to the fifth floor zone shown in FIG. 6 without calculating each water supply device individually, and pipe resistance (straight pipe portion) LOSS15 (pipe length S15) and pipe resistance (curvature), respectively. The tube portion) LOSS 16 and the pipe resistance (straight tube portion) LOSS 17 (tube length S17) are obtained. The results are stored in the memories M48, M49 and M50. Then, calculation processing of Hfx = LOSS15 + LOSS16 + LOSS17 is performed as the fifth floor zone piping resistance, and this is stored in the memory M102.

Here, the calculation of piping resistance is generally used air conditioning. It is based on the water use calculation method shown in the Sanitary Engineering Handbook or Building Equipment Handbook. Straight tube portion is, for example, by formula Darcy, curved pipe section fV ^2/2 g (where, f is the loss factor, V is the tube flow rate, g is the acceleration of gravity) is calculated by. Note that these pipe resistances may be calculated in advance, stored in the memory M40 to M50, and read out instead of being obtained by program processing.

  Similarly, in step 104, a check is made as to whether a signal has been received from each of the wireless communication means installed in the water supply pipe part specifying the fourth floor zone. If it has been received, the process proceeds to the next 105 and 106 steps. If it has not been received, the process proceeds to 107 step without processing. In step 105, the water supply amount of each of the fourth floor zone and the fifth floor zone is obtained in the same manner as described above, and the sum is stored in M100 as the maximum use water amount Q0X. In 106 steps, the pipe resistance (straight pipe portion) LOSS12 (pipe length S12) and the pipe resistance (T-shaped bent pipe portion) LOSS13 of the fourth floor zone at the maximum water usage Q0X are obtained. Since how to find it is clear as described above, explanation is omitted.

When water is used in the 4th and 5th floor zones, the amount of water flowing to the parts L12 and L13 is the sum of the water supply amounts in the 4th and 5th floor zones, so that LOSS 12 (pipe length S12), pipe resistance (T The curved pipe section) LOSS 13 calculates the sum of the water supply amounts. Further, in this case, since there is water supply to the fifth floor zone part L17, the loss calculation of the part L14 need not be performed. When there is no water supply to the 5th floor zone, the piping resistance of the part L17 is required. The pipe resistances LOSS12 and LOSS13 thus obtained are stored in the memories M40 to M50 as described above. The piping resistance in the 4th and 5th floor zones is Hfx = LOSS12 + LOSS13 + LOSS15 + LOSS16 + LOSS17. This is also stored in the memory M102. Since it is clear from the above description, only the result will be described below with the following description omitted.

  In steps 107 to 109, the sum of water supply amounts in the third, fourth, and fifth floor zones is calculated, and based on this, pipe resistances LOSS9 and LOSS10 on the third floor are obtained. In steps 110 to 112, the total water supply amount in the second, third, fourth, and fifth floor zones is calculated, and based on this, pipe resistances LOSS6 and LOSS7 in the second floor zone are obtained.

  In steps 113 to 115, the total water supply amount of the first, second, third, fourth, and fifth floor zones is calculated, and based on this, pipe resistances LOSS1, LOSS2, LOSS3, and LOSS4 of the first floor zone are obtained. In step 116, the total pipe resistance Hfx from the first floor zone to the fifth floor zone is obtained and stored in the memory M102. In step 118, there is no water use in the fifth floor zone, and the piping resistance in the fifth floor zone is zero. Here, it is determined whether there is water usage in the fourth floor zone. If the determination is YES, the description is omitted, but the same processing as the processing after the 105 step 4th floor zone is executed. If it is determined NO in step 118, the process proceeds to step 119.

  In step 119, water is not used in the 4th and 5th floor zones, and the piping resistance in the 4th and 5th floor zones is zero. Here, it is determined whether there is water usage in the third floor zone. If it is determined YES, the processing after the third floor zone, which is the same as the processing after the 108 step third floor zone, is executed. Although illustration is omitted, if there is water usage in the third floor zone and there is no water usage in the first floor, the water supply amount to the third floor zone is calculated, and the pipe resistance LOSS1, LOSS2, LOSS3, LOSS4, LOSS6, LOSS7, LOSS9, LOSS10, and LOSS11 are calculated. If NO is determined, the process proceeds to step 120.

  If the water in the second floor zone and the first floor zone is not used in steps 120 and 121, the total pipe resistance is zero. Further, in step 116A, the maximum amount of water Q0X is calculated by summing the water supply amount of each floor, and the result is stored in the memories M100 and M90. Thereafter, the process proceeds to step 116, and the process returns to the main process with a RETI of step 117.

  The interrupt process of FIG. 11 shows a process for obtaining the total head, the number of operating units, and the amount of excess water. That is, in steps 131 and 132, the maximum water amount Q0x and the maximum water amount Qmax per pump stored in the memory M are read out, respectively. In the next 133 steps, the maximum water amount Q0x is divided by the pump maximum water amount Qmax, the quotient and the remainder are obtained, this quotient is set as the number of operating units Nx, and the remainder is stored as the remaining water amount Qama in the memories M122 and M123, respectively.

  The number Nx of the operation is the number of pumps that are operated at a constant speed (operation control at a fixed maximum frequency), and the surplus water amount Qama is the amount of water that is provided by one of the pumps that is operated at a variable speed added to the Nx pumps Show. Therefore, the Nx number of constant speed pumps and the other one speed change pump cover the maximum water amount Q0x.

  The interrupt process in FIG. 12 shows a process for obtaining the total head (target pressure). That is, the actual head Ha, the suction total head Hs, the required end pressure Hp, and the pipe resistance Hf are read out, and the total of these is calculated to obtain the total head H0x and stored in the memory M103.

  FIG. 13 shows a process for obtaining the inverter initial frequency (initial speed) from the obtained surplus water amount Qama. FIG. 14 shows a pump characteristic diagram for obtaining this initial frequency (initial speed). In FIG. 14, the vertical axis represents the total head, the horizontal axis represents the amount of water, and the pump performance curve A (in the case of frequency f10) is represented. The pump performance curves B, C, D, and E corresponding to the inverter frequencies f20, f30, f40, and f50 in which the total head H0 is drawn horizontally by the line segment and the frequency is equally divided into five are plotted. The intersections of these pump performance curves and the horizontal line of the total head H0 are lowered, and the water volumes Q10, Q20, Q30, Q40, 0 are obtained, respectively. FIG. 15 shows the relationship between the amount of water and the inverter frequency.

  Returning to FIG. 13, the data of the surplus water amount Qama is read from the memory M in step 151. After 152 steps, the position of the read excess water amount Qama in any of the above-described water amounts Q10 to Q20 is checked. If the surplus water amount Qama is equal to Q10, f10 is substituted for the inverter initial frequency fstart in step 153 and stored in the memory M104. Then, the process goes to step 166.

  When the surplus water amount Qama is equal to or less than Q10, the process proceeds to step 163, where the water amount of Qama is determined. If Qama is equal to Q50, the process proceeds to step 164, and f50 is substituted for the inverter initial frequency fstart. If the surplus water amount is Q20 <Qama <Q10, the process proceeds to step 165, the initial speed calculation is executed by the proportional calculation of the calculation process 0 described later, and the result is substituted into the inverter initial frequency fstart and stored in the memory M104. Step 166 is exited.

  In step 152, if the excess water amount Qama is equal to or less than Q20, the process proceeds to step 154, where Qama and Q20 are compared and divided. In the case of Qama = Q20, f20 is substituted for the initial frequency fstart in 155 steps. In the case of Q30 <Qama <Q20, the initial speed calculation is executed by the proportional calculation of the calculation process 1 described later in 156 steps, and the result is the inverter initial value. Substituting for the frequency fstart and storing each in the memory M104, the process goes to step 166. In the case of Qama <Q30, Qama and Q30 are compared in 157 steps and divided.

  In step 157, if surplus water amount Qama = Q30, f30 is substituted for the initial frequency fstart in step 158, and if Q40 <Qama <Q30, initial speed calculation is performed by proportional calculation in calculation processing 2 described later in step 159. The result is substituted into the inverter initial frequency fstart, stored in the memory M104, and the process goes to step 166. When Qama <Q40, Qama and Q40 are compared in 160 steps and divided.

  If surplus water amount Qama = Q40, f40 is substituted for the initial frequency fstart in 161 steps, and if 0 <Qama <Q40, initial speed calculation is executed by proportional calculation in calculation processing 3 described later in 162 steps. The result is substituted into the inverter initial frequency fstart, stored in the memory M104, and the process goes to step 166.

In the arithmetic processes 0 to 3 shown above, the initial speed is obtained by proportional calculation as follows.
Arithmetic processing 0:
fstart = f20 + (f10−f20) × (Q10−Qama) / (Q10−Q20).
Arithmetic processing 1:
fstart = f30 + (f20−f30) × (Q20−Qama) / (Q20−Q30).
Arithmetic processing 2:
fstart = f40 + (f30−f40) × (Q30−Qama) / (Q30−Q40).
Arithmetic processing 3:
fstart = f50 + (f40-0) x (Q40-Qama) / (Q40-0).
Since it is clear in the above description, the detailed description after this is omitted.

  As described above, according to the amount of excess water, it can be finely divided into f10 to f50, and further, an arbitrary initial frequency between the respective frequencies can be accurately calculated by proportional calculation. The pump can be controlled at a finely determined initial speed that matches the amount of excess water in the load, and reliable energy-saving operation can be performed. The initial frequency stored in the memory M104 by the above calculation is read out during the speed change operation of the pump and is used for speed change control of the pump by the control unit CU.

  Further, by reading out the initial frequency that matches the amount of excess water in the load described above and stored in the memory M104 by calculation, the speed change control of the pump can be performed quickly.

  The interrupt processing shown in FIG. 8 to FIG. 13 is executed at any time by jumping from step 703 of the main processing in FIG. 7 to the interrupt routine, and the parameters obtained in the processing are updated and stored in the memory M. ing. Therefore, the latest parameter is always read from the memory M and used for control.

  The description returns to the main process of FIG. In step 705, it is determined whether or not a signal from the wireless communication means of the terminal has been received, that is, whether or not the water supply device group of the terminal has been opened. If it is YES, it will progress to the following 708 step, and if it is NO, it will repeat the process of 706,707,705 steps until it becomes YES. In step 706, it is determined whether the pump is in operation. If it is in operation, the pump is stopped in step 707 and the process returns to step 705.

  In step 708, it is determined whether or not the pump is in operation. If NO, the process proceeds to the next step 708A where the required number of pumps NX is read from the memory M, and in step 709, one of the required number of pumps is set to shift control and the other is set to constant speed control. Output to. Naturally, the operation is controlled in the order of the required number of units. After this, the process proceeds to step 710. If the determination result in step 708 is in operation, the process proceeds to step 709A, where the necessary number of units is updated (if two units are required and one unit is operated, one unit is additionally commanded and one is controlled at a constant speed. When one unit is required and two units are operated, one unit is instructed to stop and the remaining pump is set to shift control), and the process proceeds to step 710.

  In step 710, it is determined whether the speed change pump or the constant speed pump. If it is determined as YES, the operation command for the transmission pump is executed and the process proceeds to step 710A. If NO is determined in step 710, the flow returns to step 705 while maintaining constant speed operation (fixed at the highest pump frequency, frequency f0 shown in FIG. 3).

  In step 710A, the total head H0X (the target pressure H0 of the load for pressure control) is read from the memory M, and the pressure data H detected by the water supply pipe pressure sensor 8 is read from the memory M in step 711. In step 712, the two are compared. As a result of comparison, if H0 (= H0X) -α (α is a dead zone, for example, 2 m)> H, the process proceeds to step 716 where acceleration processing is executed by aHz (for example, 0.1 HZ is added to the current speed). Then go to the next step 717.

  If H0 (= H0X) + α <H, the process proceeds to step 713, where deceleration processing (for example, 0.1HZ is subtracted from the current speed) is executed, and the process proceeds to the next step 714. If it is neither, the process proceeds to step 715 without shifting. In steps 714 and 717, it is confirmed whether or not the commanded inverter frequency has been reached. In step 715, a wait time of a predetermined time Δt2 necessary to reach the speed by executing a shift command is executed, and the process returns to step 705. Then, the subsequent processing is continuously executed.

  In the above-described processing of the shift control 713 and 716 steps, the frequency symbol f is used to represent the No. 1 system inverter and the No. 2 system inverter, and the No. 1 system is the shift controller. If so, the frequency f is F1 (see FIG. 4), and the frequency f is F2 (see FIG. 4) if the No. 2 system is a shift controller. These frequencies F1 and F2 are stored in the memories M105 and M106 as current frequencies (variables).

  As described above, for each water supply device group (load) that is open to the water supply terminal, the number of pumps to be controlled at a constant speed, the target pressure of the load, the initial inverter frequency of one pump that performs variable speed operation (initial (Speed) is set or stored in the storage unit, and the inverter frequency is controlled so that the target pressure and the discharge pressure detected by the pressure sensor are constant. Thereby, it becomes possible for the water supply apparatus group of a terminal to supply water with a really required water supply pressure.

  In particular, it can be divided into f10 to f50 according to the amount of surplus water, and can be obtained accurately by proportionally calculating an arbitrary initial frequency between the above frequencies, so that one shift pump can be used as a surplus load. Control can be executed at an initial speed that is precisely determined according to the amount of water, and reliable energy-saving operation can be performed.

That is, the present invention includes a plurality of pumps, variable speed driving means for operating the pumps at a variable speed, a control device for controlling the variable speed driving means, and a water supply pipe pressure attached to a water supply pipe on the discharge side of the pump. A water supply group that is provided with a sensor and a plurality of water supply device groups provided at the ends of the water supply pipes of the pump and is arranged for each level, and supplies water to the plurality of water supply device groups by operating a pump. In the system,
A setting means provided in the control device for setting a pressure target value required by the water supply device group, a flow rate target value, a simultaneous opening / closing coefficient of the water supply device group, and a rotation speed parameter corresponding thereto; The first communication means for transmitting the operation status of the water supply equipment group of the hierarchical zone provided in the water supply pipe part which can classify the water supply equipment group of each hierarchical zone and specify the floor height of each hierarchical zone, and the control A second communication means provided in the apparatus;
When the control device receives a signal from the first communication means, the control device obtains the total flow rate for the water supply device group in the hierarchical zone corresponding to the transmitted first communication means, and the simultaneous opening / closing coefficient of the water supply device group is obtained. Is multiplied by the flow rate target value, and based on this flow rate target value, it is generated as the set pressure target value.
Further, the control device commands the set value of the water supply device group in the hierarchical zone corresponding to the transmitted first communication means to the variable speed drive means, and sets the target pressure value of the set value and the supply pipe pressure sensor. The variable speed driving means is controlled so that the pressure becomes equal.

  And when the said control apparatus receives the signal from the said 1st communication means, while calculating | requiring the practical head of the water supply apparatus group which has the communication means installed in the highest position among the transmitted 1st communication means, it transmitted 1st The total flow rate is obtained for the group of water supply devices in the hierarchical zone corresponding to the communication means, and this is multiplied by the simultaneous opening and closing coefficient of the water supply device group to obtain a flow rate target value to obtain a pipe resistance from the flow rate target value. A value obtained by adding a suction total head to a value obtained by adding the largest required end pressure among required end pressures of each water supply device to the added value of the pipe resistance is generated as a set pressure target value.

The control device further includes a storage unit that calculates and stores a pressure target value and a flow rate target value required by each of the water supply devices based on the setting of the setting means, or a rotation speed corresponding thereto.
When the control device receives a signal from the first communication means, it reads out the pressure target value and flow rate target value of the water supply device corresponding to the received signal, or the rotation speed corresponding to the pressure target value, and drives the drive The variable speed driving means is controlled so that the rotational speed is commanded to the means and the pressure target value read from the storage unit is equal to the pressure of the water supply pipe pressure sensor.

In addition, the storage unit stores the inverter frequency determined from the flow rate and pressure based on the pump performance as the rotation speed, and obtains the total amount of water discharge corresponding to the water supply device group of each hierarchical zone by multiplying the simultaneous opening and closing coefficient. The flow rate target value and pressure target value are stored,
When the control device receives a signal from the first communication means, it reads the flow rate target value corresponding to the transmitted communication means from the storage unit, reads the inverter frequency corresponding to the amount of water from the storage unit, Automatically generates a rotational speed corresponding to the target flow rate at startup.

  Furthermore, a water supply device pressure sensor for detecting the pressure of the water supply pipe in the hierarchical zone is provided at a water supply pipe portion that specifies the floor height of each hierarchical zone, and the first communication means includes the water supply device pressure sensor When the open state of the water supply equipment group is detected, a signal is transmitted.

In addition, the present invention provides a plurality of pumps having a predetermined maximum flow rate, a driving unit that controls constant speed control and shift control of the plurality of pumps, a control device that controls the driving unit, and a discharge side of the pump. A water supply pipe pressure sensor attached to the water supply pipe, and a plurality of water supply equipment groups provided at the end of the water supply pipe of the pump, the water supply equipment groups arranged at each level, and the pump is controlled at a constant speed and a variable speed. In the water supply system for supplying water to the plurality of water supply appliance groups by operating at
Parameters provided by the control device, such as a flow rate target value, a pressure target value, a simultaneous opening / closing coefficient of the water supply device group, a rotation speed corresponding to these, and a required number of pumps. Setting means for setting, and a first communication that is provided in a water supply pipe part that can divide the plurality of water supply device groups for each hierarchical zone and specify the floor height of each hierarchical zone, and transmits the operation status of the water supply device group Means and second communication means provided in the control device,
When the signal from the first communication means is received by the second communication means, the control device simultaneously opens and closes the total flow rate target value of each water supply device group in the hierarchical zone corresponding to the transmitted first communication means. Multiply the coefficient to obtain the maximum load flow rate. Based on this maximum flow rate, obtain the pressure target value.
Further, the control device obtains the number of pumps to be operated at a constant speed and the surplus water amount from the maximum flow rate of the load and the maximum flow rate of the pump, obtains an initial speed of the pump corresponding to the surplus water amount, and determines the number of pumps and the initial speed. Is controlled at a constant speed, and the pump corresponding to the excess water amount is controlled so that the detected pressure of the water supply pipe pressure sensor becomes the pressure target value. It is characterized by doing.

  Further, the maximum water volume of the load is divided by the maximum water supply volume of the pump, and the quotient is the number of pumps controlled at a constant speed, and the remainder is the remaining water volume.

  In addition, the control device includes a storage unit that stores the maximum flow rate of the load, the target pressure, the number of pumps, the amount of excess water, and the initial speed of the pump based on the setting of the setting unit, from the first communication unit When the second communication means receives the above signal, the required number of pumps and the initial pump speed corresponding to the received signal are read from the storage unit and commanded to the drive means.

  The flow rate target value and the target pressure value corresponding to each of the water supply devices are determined in advance as parameters, and the number of operating units and the initial speed commanded to the driving means are associated with each other by the flow rate target value and the pressure target value. ing.

The present invention also includes a variable speed drive means for variable speed operation of a plurality of pumps, a control device for controlling the variable speed drive means, and a plurality of water supply equipment groups provided at the ends of the water supply pipes of the pumps. In the water supply system for supplying water to the plurality of water supply devices by operating the pump at a variable speed,
Setting means provided in the control device for setting a target pressure value, a flow rate target value, a simultaneous opening / closing coefficient of the water supply device group, and a rotation speed corresponding to the pressure target value required for the water supply system for each of the water supply devices. And a storage unit that stores these set values, and a water supply pipe that is provided in a water supply pipe part that can divide the plurality of water supply equipment groups into hierarchical zones and specify the floor height of each hierarchical zone, and detects this pressure. An instrument group pressure sensor and first communication means for transmitting the pressure state; and second communication means provided in the control device;
When the water supply device group pressure sensor detects the open state of the water supply device group, the first communication means transmits, and when the control device receives a signal from the communication means, the control device receives the signal at the highest position. Select a water supply pressure sensor installed at a distance, send a pressure detection data transmission command to the communication means to which the selected water supply pressure sensor is attached, and supply water corresponding to the reception signal based on this transmission command The pressure target value and rotation speed of the appliance are read from the storage unit, the rotation speed is commanded to the variable speed drive means, and the water supply appliance group pressure sensor installed farthest from the pressure target value and the highest position The variable speed driving means is controlled so as to be equal to the pressure.

In addition, the present invention provides a plurality of pumps having a predetermined maximum flow rate, a driving unit that controls constant speed control and shift control of the plurality of pumps, a control device that controls the driving unit, and a discharge side of the pump. In a water supply system comprising a plurality of water supply equipment groups provided in a water supply pipe and supplying water to the plurality of water supply equipment groups by operating a pump at a constant speed and a variable speed,
Parameters provided by the control device, such as a flow rate target value, a pressure target value, a simultaneous opening / closing coefficient of the water supply device group, a rotation speed corresponding to these, and a required number of pumps. A setting means for setting, and a water supply pressure sensor for detecting the operation status of the water supply group provided in a water supply pipe part that can classify the plurality of water supply groups for each hierarchical zone and specify the floor height of each hierarchical zone; The first communication means for transmitting the operation status of the water supply device, and the second communication means provided in the control device,
When the signal from the first communication means is received by the second communication means, the control device multiplies the value obtained by summing the flow rate target values of the water supply devices corresponding to the received signal by the simultaneous opening / closing coefficient to maximize the load. The flow rate, the target pressure value is obtained from this, the number of pumps to be controlled at a constant speed from the maximum water amount of the load and the maximum water amount of the pump and the surplus water amount are obtained, the initial speed of the pump corresponding to this surplus water amount is obtained, and the number of pumps By instructing the initial speed to the drive means, constant speed control is performed on the number of pumps obtained, and the other pumps are controlled so that the pressure detected by the water supply device pressure sensor becomes the target pressure value of the load. .

  DESCRIPTION OF SYMBOLS 1 ... Water source, 1a-5e ... Water supply apparatus, 1ta-5ta ... 1st communication means, 0ta ... 2nd communication means, 1pa-5pe ... Water supply apparatus pressure sensor, 2 ... Suction pipe, 3 ... Water supply apparatus, 3-1 ... Pump, 4 ... Water supply pipe, 6 ... Motor, 7 ... Pressure tank, 8 ... Water supply pipe pressure sensor, CU ... Control device, INV1, INV2 ... Drive means, M ... Storage section, I / O ... Input / output circuit section, CPU ... microprocessor, CONS3 ... setting means, F1, F2 ... inverter frequency command signal, F10, F20 ... inverter frequency arrival signal, Q0x ... maximum amount of load water, Nx ... number of pumps, Qmax ... maximum amount of pump water, Qama ... excess water amount, f10 to f50: initial pump speed, K: simultaneous opening / closing coefficient.

Claims (9)

A plurality of pumps, variable speed driving means for operating the pumps at a variable speed, a control device for controlling the variable speed driving means, a water supply pipe pressure sensor attached to a water supply pipe on the discharge side of the pump, In a water supply system comprising a plurality of water supply equipment groups provided at the ends of the water supply pipes and provided with water supply equipment groups arranged for each level, and supplying water to the plurality of water supply equipment groups by operating a pump,
Setting means provided in the control device for setting a pressure target value required by the water supply device group, a flow rate target value, a simultaneous opening / closing coefficient of the water supply device group, and a set value which is a parameter of a rotational speed corresponding thereto. And a first communication means for transmitting the operation status of the water supply device group of the hierarchical zone provided in the water supply pipe part that can classify the plurality of water supply device groups for each hierarchical zone and specify the floor height of each hierarchical zone And a second communication means provided in the control device,
When the control device receives a signal from the first communication means, the control device obtains the total flow rate of the water discharge amount when the water supply device group of the hierarchical zone corresponding to the transmitted first communication means is opened. the multiplied by the simultaneous closing coefficient of plumbing fixtures group and flow rate target value, calculates a pressure target value of the set value based on the flow rate target value,
Further, the control device commands the set value of the water supply device group in the hierarchical zone corresponding to the transmitted first communication means to the variable speed drive means, and sets the target pressure value of the set value and the supply pipe pressure sensor. The water supply system, wherein the variable speed drive means is controlled so that the pressure is equal. The water supply system according to claim 1,
When the control device receives a signal from the first communication means, the control device obtains the practical head of the water supply device group having the communication means installed at the highest position among the first communication means transmitted, and the first communication means transmitted The total flow rate is obtained for the group of water supply devices in the hierarchical zone corresponding to the above, and this is multiplied by the simultaneous opening and closing coefficient of the water supply device group to obtain a flow rate target value to obtain a pipe resistance from the flow rate target value. A water supply system that generates a value obtained by adding a suction total head to a value obtained by adding the largest required end pressure among required end pressures of each water supply device group to the added value of resistance as a set pressure target value . The water supply system according to claim 1 or 2,
Wherein the control device further includes a storage unit for memorize a rotational speed corresponding to the pressure target value and the flow rate target value or which require the respective water supply device groups based on the setting of the setting means,
When the control device receives a signal from the first communication means, it reads out the pressure target value and the flow rate target value of the water supply device group corresponding to the received signal, or the rotation speed corresponding to the pressure target value from the storage unit, and A water supply system characterized by commanding a rotational speed to the drive means and controlling the variable speed drive means so that a pressure target value read from the storage unit is equal to a pressure of the water supply pipe pressure sensor. The water supply system according to claim 3,
The storage unit stores the inverter frequency determined from the flow rate and pressure based on the pump performance as the rotational speed, and the flow rate target obtained by multiplying the total amount of water discharge corresponding to the water supply group of each hierarchical zone by the simultaneous opening / closing coefficient. Value and pressure target value are stored,
When the control device receives a signal from the first communication means, it reads the flow rate target value corresponding to the transmitted communication means from the storage unit, reads the inverter frequency corresponding to the amount of water from the storage unit, A water supply system that automatically generates a rotational speed corresponding to a flow rate target value at start-up. In the water supply system in any one of Claims 1-4,
Furthermore, a water supply device pressure sensor for detecting the pressure of the water supply pipe in the hierarchical zone is provided at a water supply pipe portion that specifies the floor height of each hierarchical zone, and the first communication means includes the water supply device pressure sensor A water supply system that transmits a signal when an open state of a water supply device group is detected. A plurality of pumps having a predetermined maximum flow rate, a driving unit for controlling the plurality of pumps with constant speed control and shift control, a control unit for controlling the driving unit, and a water supply pipe on the discharge side of the pump. A water supply pipe pressure sensor and a plurality of water supply equipment groups provided at the end of the water supply pipe of the pump, the water supply equipment group arranged for each level, and by operating the pump at a constant speed and a variable speed, In a water supply system for supplying water to a plurality of water supply equipment groups,
Parameters provided by the control device, such as a flow rate target value, a pressure target value, a simultaneous opening / closing coefficient of the water supply device group, a rotation speed corresponding to these, and a required number of pumps. Setting means for setting, and a first communication that is provided in a water supply pipe part that can divide the plurality of water supply device groups for each hierarchical zone and specify the floor height of each hierarchical zone, and transmits the operation status of the water supply device group Means and second communication means provided in the control device,
When the signal from the first communication means is received by the second communication means, the control device simultaneously opens and closes the total flow rate target value of each water supply device group in the hierarchical zone corresponding to the transmitted first communication means. Multiply the coefficient to obtain the maximum load flow rate. Based on this maximum flow rate, obtain the pressure target value.
Further, the control device obtains the number of pumps to be operated at a constant speed and the surplus water amount from the maximum flow rate of the load and the maximum flow rate of the pump, obtains an initial speed of the pump corresponding to the surplus water amount, and determines the number of pumps and the initial speed. Is controlled at a constant speed, and the pump corresponding to the excess water amount is controlled so that the detected pressure of the water supply pipe pressure sensor becomes the pressure target value. The water supply system characterized by doing. The water supply system according to claim 6,
The water supply system is characterized in that the maximum water volume of the load is divided by the maximum water supply volume of the pump, and the quotient is the number of pumps controlled at a constant speed, and the remainder is the remaining water volume. The water supply system according to claim 6 or 7,
The control device includes a storage unit that stores a maximum flow rate of the load, a target pressure, the number of pumps, a surplus water amount, and an initial pump speed based on the setting of the setting unit, and a signal from the first communication unit. Is received by the second communication means, the required number of pumps corresponding to this received signal and the initial speed of the pump are read from the storage unit and commanded to the drive means. In the water supply system in any one of Claims 6-8,
The flow rate target value and the target pressure value corresponding to each of the water supply device groups are determined in advance as parameters, and the number of operating units and the initial speed commanded to the driving means are associated with each other by the flow rate target value and the pressure target value. A water supply system characterized by

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