CN105637224A - Water supply device - Google Patents

Abstract

In the case of conventional water supply devices that utilize multiple motor-driven pumps, the speed of each of said motors being controlled by an inverter, when supplying of water at a high flow rate that cannot be supplied by one pump is requested, an additional pump is introduced if the load current value of an in-service pump is equal to or greater than a rated current value, thereby preventing an overload state of the motor and the temperature of the motor from becoming high. However, when the ambient temperature of the motor is high, the motor ends up reaching a rated temperature even at a current value lower than the rated value. By contrast, when the rated current value is set slightly lower on the assumption of outdoor installation, the pump cannot exhibit sufficient performance in many installation environments. Thus, the purposes of the present invention are to protect a motor in a high-temperature state and to continue with stable supplying of water, and the present invention is configured such that when an in-service pump or inverter has exceeded a predetermined temperature, a command is sent to an inverter that controls an out-of-service motor in order to start operating the motor. Consequently, the motor in the high-temperature state is cooled, thereby enabling stable supplying of water.

Description

Water supply installation

Technical field

The present invention relates in employing the water supply installation by being controlled multiple pumps that the motor of speed drives respectively by multiple converters, the confession water management of the situation that applicable motor or converter reach a high temperature.

Background technology

About the water supply installation employed by being controlled multiple pumps that the motor of speed drives respectively by multiple converters, it is disclosed in Japanese Unexamined Patent Publication 2012-112362 publication (patent documentation 1).

In patent documentation 1, when the water yield of the big flow needing 1 pump of supply to supply, if the load current value of the First pump in operating is more than load current value, then put into second pump, it is controlled in the way of less than load current value, thus preventing the overload of motor, it is prevented that motor reaches a high temperature.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2012-112362 publication

Summary of the invention

Invention to solve the technical problem that

But, in patent documentation 1, when the environment temperature of motor is high, even if not up to load current value, motor is likely to and reaches rated temperature. Although recording environment temperature etc. as specification in operation instructions etc., but the temperature rising etc. caused because of direct sunlight when open air is arranged, and surrounding motors temperature is likely to and unexpectedly reaches a high temperature. On the contrary, it is considered to when outdoor is arranged a variety of causes such as the impact of direct sunlight regulation load current value (temperature rising) when, it is impossible to enough the sufficient ability that plays under environment is being set mostly.

Further, in order to make motor less than rated temperature, the maximum speed of pump is set in less than in the scope of load current value. Herein, operate with exceeding load current value sometimes when the excessive flow that flowed etc. But, so temporarily exceed load current value and motor can't be made to exceed rated temperature, but take owing to limiting pump performance to increase the countermeasures such as pump operating number, there is the problem that the overall efficiency of water supply installation reduces.

The present invention completes in view of above-mentioned technical problem, its object is to protect the motor being in the condition of high temperature and then continual and steady water supply.

Technical teaching for solving the problem was

In order to solve above-mentioned technical problem, for instance adopt the structure recorded in technical scheme. The present invention includes the technical scheme of multiple solution the problems referred to above, lifts one example, when the motor operated or converter have exceeded set point of temperature, the converter of motor controlling not operate sends the instruction of operating.

The effect of invention

In accordance with the invention it is possible to make to be in the motor cooling of the condition of high temperature, it is prevented that fault, and carry out stable water supply.

Accompanying drawing explanation

Fig. 1 is the motor that drives of pump and the outside drawing that forms as one of converter.

Fig. 2 is the expanded view of the electric rotating machine part of Fig. 1 and converter.

Fig. 3 indicates that the integrally-built figure of the water supply installation of the present embodiment 1 to 3.

Fig. 4 indicates that the figure of the data content of the storage part of the converter of the present embodiment 1 to 3.

Fig. 5 indicates that the figure of the data content of the storage part controlling device of the present embodiment 1 to 3.

Fig. 6 indicates that the figure from converter transmission to the content of the communication data controlling device of the present embodiment 1 to 3.

Fig. 7 indicates that the figure from control device transmission to the content of the communication data of converter of the present embodiment 1 to 3.

Fig. 8 A indicates that the figure of the first half of the main control flow process of the present embodiment 1 to 3.

Fig. 8 B indicates that the figure of the latter half of the main control flow process of the present embodiment 1 to 3.

Fig. 9 is the detailed control flow of the single pump operation start confirmation process of the present embodiment 1 and 3.

Figure 10 is the detailed control flow of the Stress control process of the present embodiment 1 to 3.

Figure 11 A is the first half of the detailed control flow of the parallel operation start confirmation process of the present embodiment 1 and 3.

Figure 11 B is the latter half of the detailed control flow of the parallel operation start confirmation process of the present embodiment 1 and 3.

The single pump operating that Figure 12 is the present embodiment 1 and 2 stops the detailed control flow that confirmation processes.

The parallel operating that Figure 13 is the present embodiment 1 and 2 stops the detailed control flow that confirmation processes.

Figure 14 is the detailed control flow of the single pump operation start confirmation process of the present embodiment 2.

Figure 15 A is the first half of the detailed control flow of the parallel operation start confirmation process of the present embodiment 2.

Figure 15 B is the latter half of the detailed control flow of the parallel operation start confirmation process of the present embodiment 2.

The single pump operating that Figure 16 is the present embodiment 3 stops the detailed control flow that confirmation processes.

Figure 17 A is the first half of the detailed control flow of the parallel operating stopping confirmation process of the present embodiment 3.

Figure 17 B is the latter half of the detailed control flow of the parallel operating stopping confirmation process of the present embodiment 3.

The converter that Figure 18 is the present embodiment 1 to 3 stops the detailed control flow that judgement processes.

Figure 19 is the explanation figure of the output of the present embodiment 4, pressure of supply water and pump operating range.

Detailed description of the invention

Hereinafter, with accompanying drawing, embodiments of the invention are described.

[embodiment 1]

In embodiment 1, in the water supply installation of the pump employed by being driven by the motor of Frequency Converter Control speed, this converter is arranged in a part for the housing of the periphery of the armature constituting above-mentioned motor, also utilizes the temperature detector being arranged in this converter to detect the temperature of this housing. Further, use this temperature detector detection case temperature, when carrying out the motor that operates or converter has exceeded set point of temperature, the converter of motor controlling not operate is sent the instruction of operating. And then, when the motor stopped has exceeded set point of temperature, the converter controlling this motor is sent the instruction of operating.

That is, when motor or converter have exceeded set point of temperature, even if when the reduction of pressure of supply water not occurring or not being above the load current value of load current value, control device and also add pump and operate, thus realizing load dispersion.

Illustrate firstly, for the premise of the present embodiment and the relation accompanying drawing of motor and converter. Fig. 1 is the motor that drives of pump and the outside drawing that is integrally forming of converter. In Fig. 1,1 is the cover of the periphery covering synchronous motor body, 2 is the cooling dome 2 of the built-in cooling fan 25 illustrated below, 3 is the casing of converter that install at the outer peripheral face of cover 1, that storage illustrates hereinafter, the terminal box of 4 noise filters that have been built-in, 5 is end frame, and 6 is the rotating shaft that the rotor with motor forms as one.

Additionally, Fig. 2 has illustrated the expanded view of each several part of electric rotating machine part and the converter received in the inside of above-mentioned cover 1. In Fig. 2,9 is the housing of electric rotating machine, defines cooling fins 22 in a part for its outer surface. In addition, although invisible in the drawings, but in the inside of housing 9, insert stator and the rotor of electric rotating machine, 24 is the end frame installed in the side contrary with above-mentioned end frame 5, in the end of housing 9, and 25 is be arranged on the cooling fan on above-mentioned rotating shaft 6 in the outside of end frame 24. Additionally, in the plane 23 of housing 9, be mounted with converter 7 via the peristome 21 arranged in a part for cover 1, afterwards, be mounted with the cover 3 for protecting it from outside.

Additionally, converter has the power switch component etc. as heater element, therefore implement, for the heat condition monitoring them, the purpose protected, be provided with temperature detector. 26 is control and I/F substrate casing, and 27 is smoothing capacity device casing. And, in another end (left end in figure) of housing 9, above-mentioned cooling dome 2 is installed. Additionally, the symbol 8 in figure illustrates that the substantially central portion at the wall of this cooling dome 2 is the aperture of the air for importing outside formed latticedly.

Namely, converter 7 is directly installed in the plane 23 of a part for the housing 9 of electric rotating machine, converter 7 and the housing heat conduction integratedly being made up of the material that heat conductivity is outstanding, it is possible to the temperature detector being positioned within converter, the temperature of converter and housing is carried out one and manage.

Then, the overall structure for the water supply installation of the present embodiment illustrates.

In Fig. 3,10-1,10-2,10-3 represent pump, by the motor-driven shown in 20-1,20-2,20-3. Here for convenient, from numbering less pump and motor, it is called No. 1 pump, No. 2 pumps, No. 3 pumps and No. 1 motor, No. 2 motor, No. 3 motor. The suction side of these pumps is connected with side, water source via the suction tube shown in 11. Side, water source accepts the supply of the water from not shown total feed pipe under direct-connected mode, accepts the supply of water under supply flume mode from not shown supply flume. 12-1,12-2,12-3,14-1,14-2,14-3 represent gate valve respectively, and 13-1,13-2,13-3 represent check-valves respectively, and 15 represent feed pipes, 17 be disposed on feed pipe 15 correspondingly send the pressure sensing cell of the signal of telecommunication with pressure herein. The discharge pressure of pump is controlled (such as discharge pressure constant control, reckoning terminal pressure constant control) by the detected value based on this pressure sensing cell. And then, when being direct sending formula as the target of the end of the feed pipe 15 of Demand-side, it is connected with Demand-side feed pipe, for instance the faucet of condominium etc. is supplied water. When high-order water supply slot type, it is connected with this Demand-side feed pipe and high-order supply flume is supplied water. 18 pressurized tanks for suppressing pressure oscillation sharply being disposed on feed pipe 15.

Shown in 30-1,30-2,30-3 No. 1 converter, No. 2 converters, No. 3 converters accept the supply of power supply from mains side, power-converting device shown in 32-1,32-2,32-3 changes the frequency of output electric current respectively, thus being driven with changing the rotating speed of motor 20-1,20-2,20-3. 31-1,31-2,31-3 are arithmetic processing section, according to the control parameter of storage in the storage part shown in 33-1,33-2,33-3, according to the signal inputted from the signal input part shown in 34-1,34-2,34-3, the operating/stopping of operating motor 20-1,20-2,20-3 and rotation speed change.

40 is control device, is managed the operating number of pump by converter 30-1,30-2,30-3. 41 is arithmetic processing section, according to the control parameter of storage in the storage part shown in 43, manages the operating number of pump according to the signal inputted from the signal input part shown in 44. Control device 40 to be connected via the communication/control line shown in 50-1,50-2,50-3 respectively with converter 30-1,30-2,30-3, the signal needed for the control of exchange control device 40 and converter 30-1,30-2,30-3.

Then, the content of volatile storage and the content of non-volatility memorizer for storing in storage part 33-1,33-2,33-3 of converter 30-1,30-2,30-3 illustrate.

Fig. 4 (a) illustrates the content of volatile storage, Fig. 4 (b) has illustrated the content of non-volatility memorizer. In addition it is also possible to do not have storage part inside converter, and change installation storage device outside converter into.

In Fig. 4 (a), the address 1000 of volatile storage stores the current discharge side pressure DPN of water supply installation.

Address 1001 stores the current rotating speed HzN of the motor controlled.

Address 1002 stores the current load current value AMN of the motor controlled.

Address 1008 stores current state of temperature SRN. Storing 0 in SRN under motor temperature and the normothermic situation of converter, motor temperature and any side in converter temperature store 1 when being high temperature in SRN.

Additionally, in Fig. 4 (b), the address 3000 of non-volatility memorizer prestores the identification number NO of pump. Control device and converter with more than 1 reconnect more communicate when, for by controlling device differentiation converter. Controlling device need not when 11 ground are connected respectively with converter.

Address 3001 prestores the target discharge side pressure HS of water supply installation.

Address 3002 prestores the maximum speed NMAX of motor, address 3003 prestores the minimum speed NMIN of motor.

Address 3012 prestores goal pressure Poff when water supply installation shuts down.

Address 3013 is stored in advance in the goal pressure P0 under closed valve state, address 3014 prestores the goal pressure P1 under the maximum amount of water that can supply with 1 pump. When carrying out calculating the operating of terminal pressure constant control with 1 pump, the change with the water yield correspondingly makes pressure of supply water change from the scope of this P0 to P1.

Address 3015 prestores the goal pressure P2 under the maximum amount of water that can supply with 2 pumps. When carrying out calculating the operating of terminal pressure constant control with 1 pump, the change with the water yield correspondingly makes pressure of supply water change from the scope of P1 to P2 before this.

Address 3016 prestores the goal pressure P3 under the maximum amount of water that can supply with 3 pumps. When carrying out calculating the operating of terminal pressure constant control with 3 pumps, the change with the water yield correspondingly makes pressure of supply water change from the scope of P2 to P3 before this.

Additionally, make P0, P1, P2, P3 become the value identical with HS when carrying out discharge pressure constant control.

Address 3030 prestores minimum running speed N1D when turning by 1 pumping. When operating under closed valve state with 1 pump, goal pressure being set to P0, running speed is set to N1D.

Address 3031 is stored in advance in when turning by 1 pumping and starts 2 parallel operatings, running speed N1A when making the operating number of pump become 2. Under the maximum amount of water that can supply with 1 pump, goal pressure being set to P1, running speed is set to N1A.

Address 3032 is stored in advance in when turning 2 parallel operatings of stopping, running speed N2D when making the operating number of pump become 1 by 2 pumping. Under the least quantity with 2 pump supplies, goal pressure being set to P1, the running speed of 1 pump is set to N2D, and the running speed of another 1 pump is set to N1A.

Address 3033 is stored in advance in when turning by 2 pumping and starts 3 parallel operatings, running speed N2A when making the operating number of pump become 3. Under the maximum amount of water that can supply with 2 pumps, goal pressure being set to P2, running speed is set to N2A.

Address 3034 is stored in advance in when turning 3 parallel operatings of stopping, running speed N3D when making the operating number of pump become 2 by 3 pumping. Under the least quantity with 3 pump supplies, goal pressure being set to P2, the running speed of 1 pump is set to N3D, and the running speed of other 2 pumps is set to N2A.

Address 3035 prestores the highest running speed N3A when turning by 3 pumping. Under the maximum amount of water that can supply with 3 pumps, goal pressure being set to P3, running speed is set to N3A.

Then, the content of volatile storage and the content of non-volatility memorizer for storage in the storage part 43 controlling device 40 illustrate.

Fig. 5 (a) illustrates the content of volatile storage, Fig. 5 (b) has illustrated the content of non-volatility memorizer. In addition it is also possible to controlling not have inside device storage part, and change into and controlling to install outside device storage device.

In Fig. 5 (a), the address 1000 of volatile storage stores in the same manner as the storage part of converter the current discharge side pressure DPN of water supply installation.

Address 1004 stores the pump numbering RNO being currently running. Because whether the pump respectively numbered by 1 variable storage operates, so such as each bit to the variable of each numbering machine assignment RNO, first bit is that high level (High) then represents that No. 1 pump operates, second bit is that high level (High) then represents that No. 2 pumps operate, and so store. If thus RNO is 1, can interpolate that No. 1 pump operates, RNO is 3 and can interpolate that No. 1 pump and No. 2 pumps operate, and SRP is 5 and can interpolate that No. 1 pump and No. 3 pumps operate.

Address 1005 stores just at the pump numbering VNO of changed speed operation. In address 1006, the storage next one to carry out the pump numbering PNO of changed speed operation.

Address 1007 stores the motor/converter SRP of the condition of high temperature. Because whether the motor respectively numbered by 1 variable storage or converter are the condition of high temperature, so such as each unit being distributed each bit of the variable of SRP, first bit is that high level (High) then represents that No. 1 motor or No. 1 converter are the condition of high temperature, second bit is that high level (High) then represents that No. 2 motor or No. 2 converters are the condition of high temperature, so stores. If thus SRP is 1, can interpolate that No. 1 motor or No. 1 converter are the condition of high temperature, SRP is 3 and can interpolate that No. 1 motor or No. 1 converter and No. 2 motor or No. 2 converters are the condition of high temperature, and SRP is 5 and can interpolate that No. 1 motor or No. 1 converter and No. 3 motor or No. 3 converters are the condition of high temperature.

Address 1010 stores the number of units RPN of the pump being currently running in water supplying unit.

Address 1101 stores the current rotating speed HzV of (changed speed operation) pump carrying out speed controlling in the pump operated.

Address 1102 stores the current load current value AMV of (changed speed operation) pump carrying out speed controlling in the pump operated.

In address 1201, storage sets TN1 remaining time of the timer of the acknowledging time of the beginning condition establishment of parallel operating, in address 1202, storage sets TN2 remaining time of the timer of the acknowledging time of the stop condition establishment of operating parallel, and in address 1203, storage sets TN3 remaining time of the timer of the acknowledging time of the stop condition establishment of single pump.

Additionally, in Fig. 5 (b), the address 2001 of non-volatility memorizer prestores the pump number of units PNUM of water supply installation.

Address 2002 prestores the maximum number of units PMAX of the parallel operating of water supply installation.

Address 2101 prestores the acknowledging time TM1 that the beginning condition of parallel operating is set up.

Address 2102 prestores the acknowledging time TM2 that the stop condition of parallel operating is set up.

Address 3000 prestores the identification number NO of pump. The identification number controlling device is set to 0. With converter with more than 1 reconnect more communicate when, for by control device distinguish converter. Controlling device need not when 11 ground are connected respectively with converter.

Address 3011 prestores the discharge pressure Pon that water supply installation starts running.

Address 3013 prestores the goal pressure P0 under closed valve state.

Address 3021 is stored in advance in when turning by 1 pumping and starts 2 parallel operatings, second parallel initiation pressure P1A. When 1 pump operates above with running speed N1A, when the state of discharge side insufficient pressure P1A have passed through more than timer 1 (TM1) the setting time, make second to pump up dynamic, make 2 pumps operate simultaneously.

Address 3022 is stored in advance in stopping 2 parallel operatings, second parallel stopping pressure P 2D when turning by 2 pumping. When in pump 1 operates with below running speed N2D, discharge side pressure is when the state of more than P2D have passed through more than timer 2 (TM2) the setting time, the operating making the pump (First pump) started at first stops, and only turns by 1 pumping.

Address 3023 is stored in advance in when turning by 2 pumping and starts 3 parallel operatings, the 3rd parallel initiation pressure P2A. When 2 pumps operate above with running speed N2A, when the state of discharge side insufficient pressure P2A have passed through more than timer 1 (TM1) the setting time, make the 3rd to pump up dynamic, make 3 pumps operate simultaneously.

Address 3024 is stored in advance in stopping 3 parallel operatings, the 3rd parallel stopping pressure P 3D when turning by 3 pumping. When in pump 1 operates with below running speed N3D, discharge side pressure is when the state of more than P3D have passed through more than timer 2 (TM2) the setting time, the operating making the pump (First pump) started at first stops, and operates with 2 pumps.

3030 to address, address 3034 prestores the content same with the storage part of converter. Omit the description herein.

Address 3041 is stored in advance in when turning by 1 pumping to start 2 parallel operatings, second start load current value A1A parallel. The load current value of 1 pump, when the state of more than A1A have passed through more than timer 1 (TM1) the setting time, makes second to pump up dynamic, makes 2 pumps operate simultaneously.

Address 3042 is stored in advance in stopping 3 parallel operatings, the 3rd parallel stopping load current value A2D when turning by 3 pumping. When the load current value of 1 in pump is less than the operating of A2D ground, when have passed through more than timer 2 (TM2) the setting time, make the operating of the pump (First pump) started at first stop, only turning by 1 pumping.

Address 3043 is stored in advance in when turning by 2 pumping to start 3 parallel operatings, the 3rd start load current value A2A parallel. The load current value of 1 in pump, when the state of more than A2A have passed through more than timer 1 (TM1) the setting time, makes the 3rd to pump up dynamic, makes 3 pumps operate simultaneously.

Address 3044 is stored in advance in stopping 3 parallel operatings, the 3rd parallel stopping load current value A3D when turning by 3 pumping. When the load current value of 1 in pump is less than the operating of A3D ground, when have passed through more than timer 2 (TM2) the setting time, make the operating of the pump (First pump) started at first stop, turning by 2 pumping.

Then, communication data is illustrated.

Fig. 6 illustrates from converter controlling the example of communication data that device sends via communication/control line 50-1,50-2,50-3. In addition, can not also communicate, but prepare the analog signal line with data bulk equal number or digital signal line, the exchange of data is carried out by the high level (High) of the voltage of analog signal line or electric current or digital signal line/low level (Low).

In Fig. 6, first send, from converter, the Bit String STA that communication starts. Then identification number (the pump identification number of the machine) NO sending transmission source, identification number (representing " 0 " that the controls device) TO sending target, current running speed HzN, current load current value AMN, current state of temperature SRN, send the value of the checksum CRC of the data using the specific calculating formula that confirmation correctly have sent these data to calculate, finally send the Bit String STP of sign off. The value of the verification sum that the specific calculating formula of data use that control device receives by carrying out basis calculates and the comparison of the checksum value received, it is possible to judge whether to be received correctly data. Control device respectively using being stored in volatile storage address 1101 as the running speed HzN of the converter transmission of the numbering of changed speed operation pump storage as the current running speed HzV of changed speed operation pump from volatile storage address 1005, load current value AMN is stored in volatile storage address 1102 as the current load current value AMV of changed speed operation pump.

Fig. 7 illustrates from controlling the device example to the communication data that converter sends via communication/control line 50-1,50-2,50-3.

First from controlling the Bit String STA that device transmission communication starts. Then send identification number (representing " 0 " that the controls device) NO of transmission source, send identification number (pump identification number) TO, the operating/halt instruction DRC of target, send the value of the checksum CRC of the data using the specific calculating formula that confirmation correctly have sent these data to calculate, finally send the Bit String STP of sign off. The value of the verification sum that the specific calculating formula of data use that converter receives by carrying out basis calculates and the comparison of the checksum value received, it is possible to judge whether to be received correctly data.

When operating/stopping instruction DRC is 0, converter makes motor stop. When receiving the instruction that operating/halt instruction DRC is 1,3 such changed speed operations (speed controlling), converter changes the rotating speed of motor so that current discharge side pressure DPN is consistent with target discharge side pressure HS. When receiving the instruction that operating/stopping instruction DRC is 2,4 such constant speed operatings, converter makes motor operate with the highest running speed N2A corresponding with operating number, N3A.

Then, the control flow Fig. 8 for the present embodiment illustrates.

Fig. 8 is the main control flow process of the present embodiment. Fig. 8 is divided into Fig. 8 A and Fig. 8 B for the convenience of paper, but continuous by symbol A, B. Fig. 8 A and Fig. 8 B is merged into Fig. 8 and illustrates by the following description. In Fig. 8, in step 100, as initialization process, the read/write of each control parameter is carried out. From control device, each converter is communicated in a step 101. Converter receives this Content of Communication, changes the state of operating/stopping. Each converter communicates controlling device in a step 102. Control device and receive this Content of Communication, understand the current running speed of each converter, load current value, state of temperature, be stored under the corresponding numbering of volatile storage. When the operating number of pump is 0 in step 103, the single pump operation start confirmation carrying out step 120 processes. Step 121 confirms whether separate unit operation start condition is set up, controls device when establishment in step 122 and current pump operating number is set to 1, be stored in volatile storage address 1010, and return step 101. In step 121 in the invalid situation of separate unit operation start condition, do not carry out any process, return step 101.

The operating number of pump is not in the situation (having there is the situation of the pump operated) of 0 in step 103, carries out Stress control process in step 130, carries out parallel operation start process in step 140. Step 141 confirming, whether parallel operation start condition is set up, in step 142 current pump operating number is added 1 when establishment, be stored in volatile storage address 1010, and return step 101.

In step 141 in the invalid situation of operation start condition, confirming the operating number of pump in step 143, when operating number is 1, the single pump operating carrying out step 150 stops confirmation process. Step 151 confirms whether separate unit shutdown condition is set up, controls device when establishment in step 152 and current pump operating number is set to 0, be stored in volatile storage address 1010, and return step 101. In step 151, separate unit stops, in the invalid situation of beginning condition, not carrying out any process, returns step 101.

When the operating number of pump is not 1 in step 143, carries out parallel operating in a step 160 and stop confirmation process. Confirm whether shutdown condition is set up in the step 161, in step 162 current pump operating number is subtracted 1 when establishment, be stored in volatile storage address 1010, and return step 101. In the invalid situation of operation start condition in the step 161, do not carry out any process, return step 101.

Then, for Fig. 8 step 120 single pump operation start confirmation process details, illustrate with Fig. 9.

In Fig. 9, control device in step 200 and the motor/converter SRP of the condition of high temperature of storage in volatile storage address 1007 is confirmed. If SRP is 0, then it it is the state of motor or the converter being absent from the condition of high temperature. Step 210 is advanced to when SRP is 0, in step 210 the current discharge side pressure DPN of the water supply installation of storage in volatile storage address 1000 being confirmed, the discharge side pressure P on that the water supply installation prestored in DPN and non-volatility memorizer address 3011 is started running compares.

DPN is when more than Pon, and being considered as separate unit operation start condition in step 221 is false, and advances to the step 121 of Fig. 8. When DPN is less than Pon, in the step 212 the pump numbering PNO that the next one of storage in volatile storage address 1006 to operate is stored in volatile storage address 1005 as the pump VNO carrying out changed speed operation, afterwards, advances to step 222.

When SRP is not 0 (there is motor or the converter of the condition of high temperature) in step 200, confirm that the cooling fan that works independently of the operating relative to motor and converter arranged in water supply installation is whether in stopping in step 201, begin to cool down the operating of fan cooling fan is in stopping in step 202., advance to step 203. When cooling fan is on-stream in step 201, advance to step 203. Judge the pump numbering becoming the condition of high temperature in step 203 according to the value of SRP, the pump becoming condition of high temperature numbering is stored in volatile storage address 1005 as the pump VNO carrying out changed speed operation, afterwards, advances to step 222.

It is considered as separate unit operation start condition in step 222 to set up, step 223 starts the operating of the pump carrying out changed speed operation of storage in VNO, the pump numbering that the next one of volatile storage address 1006 to carry out operate in step 224 is updated to the pump of the next numbering of the pump carrying out changed speed operation, advances to the step 121 of Fig. 8.

Then, for Fig. 8 step 130 Stress control process details, illustrate with Figure 10.

In Figure 10, in step 300 the goal pressure HsN that DPN is corresponding with the current water yield with water supply installation of storage in volatile storage address 1009 is compared. When DPN is higher than HsN, power conversion unit instruction is slowed down by the arithmetic processing section of converter in step 301, and power-converting device reduces the instruction frequency that motor is sent in step 302, makes running speed slow down, advances to the step 140 of Fig. 8. DPN is when below HsN, and power conversion unit instruction is accelerated by the arithmetic processing section of converter in step 303, and power-converting device increases the instruction frequency that motor is sent in step 304, makes running speed accelerate, advances to the step 140 of Fig. 8.

Then, for Fig. 8 step 140 parallel operation start confirmation process details, illustrate with Figure 11.

Figure 11 is divided into Figure 11 A and Figure 11 B for the convenience of paper, but continuous by symbol A, B, C. Figure 11 A and Figure 11 B is merged into Figure 11 and illustrates by the following description. In Figure 11, control device in step 400 according to the pump numbering confirming in stopping of the pump numbering RNO carrying out speed change/constant speed operating of storage in volatile storage address 1004, and then confirm motor or the converter of the condition of high temperature according to SRP. When pump in stopping is absent from motor or the converter of the condition of high temperature, in step 410 the current load current value AMV of the changed speed operation pump of storage in volatile storage address 1102 is compared with the load current value starting parallel operating prestored in non-volatility memorizer. When being 2 with load current value A1A when starting 2 parallel operatings of address 3041, operating number when operating number is 1, load current value A2A when starting 3 parallel operatings with address 3043 compares. When AMV deficiency starts load current value parallel, in step 411, DPN is compared with the parallel operation start pressure prestored in non-volatility memorizer. When being 2 with discharge side pressure P 1A when starting 2 parallel operatings of address 3021, operating number when operating number is 1, discharge side pressure P 2A when starting 3 parallel operatings with address 3023 compares. Advance to step 413 DPN is more than parallel initiation pressure, the timer (timer 1) that starts parallel described later is set to halted state, advances to step 421. Step 421 is considered as parallel operation start condition be false, advances to the step 141 of Fig. 8.

AMV is in the situation starting more than load current value parallel or step 411 when DPN deficiency initiation pressure parallel in step 410, in step 412 HzV is compared with the parallel commencing speed prestored in non-volatility memorizer. When being 2 with running speed N1A when starting 2 parallel operatings of address 3031, operating number when operating number is 1, running speed N2A when starting 3 parallel operatings with address 3033 compares. HzV deficiency start running parallel speed when advance to step 413, the timer (timer 1) that starts parallel described later is set to halted state, advances to step 421. Step 421 is considered as parallel operation start condition be false, advances to the step 141 of Fig. 8.

HzV is more than the speed that starts running parallel, confirm the state starting timer (timer 1) parallel in step 414, if starting timer parallel in stopping, being set in counting by starting timer parallel, being stored in what non-volatility memorizer address 2101 stored in volatile storage address 1201 as TN1 remaining time of timer 1 until the time TM1 started parallel. Start the counting down of TN1 remaining time of timer 1 in step 415, advance to step 421. Step 421 is considered as parallel operation start condition be false, advances to the step 141 of Fig. 8.

When starting parallel in step 414 during timer is not off, confirm that timer 1 is whether in counting, advances to step 421 in counting in step 416. Step 421 is considered as parallel operation start condition be false, advances to the step 141 of Fig. 8. When counting terminates and is in done state, advance to step 422.

In step 400, when pump in stopping exists motor or the converter of the condition of high temperature, confirm that the cooling fan that works independently of the operating relative to motor and converter arranged in water supply installation is whether in stopping in step 401, begin to cool down the operating of fan cooling fan is in stopping in step 402, advance to step 403. When cooling fan is on-stream in step 401, advance to step 403. The pump numbering becoming the condition of high temperature in stopping is judged in step 403 according to the value of RNO and SRP, pump in the stopping becoming the condition of high temperature is numbered the pump PNO operated as the next one and is stored in volatile storage address 1006, afterwards, step 422 is advanced to.

It is considered as parallel operation start condition in step 422 to set up, step 423 starts constant speed (constant speed) operating of the pump that the next one of storage to operate in PNO, in pump from stop numbering, the next one of selective volatilization storage address 1006 to carry out the pump numbering operated in step 424, it is updated to this numbering, advances to the step 141 of Fig. 8.

Then, the single pump operating for the step 150 of Fig. 8 stops the details that confirmation processes, and illustrates with Figure 12.

In Figure 12, confirm SRP in step 500. SRP (exists motor or the converter of the condition of high temperature) more than 1, advance to step 511. When SRP is 0 (being absent from motor or the converter of the condition of high temperature) in step 500, confirm that whether the cooling fan that the operating relative to motor and converter arranged in water supply installation works independently is on-stream in step 501, cooling fan makes the operating of cooling fan stop when on-stream in step 502, advances to step 511. That is, multiple motor or converter make the operating of cooling fan stop when not being the condition of high temperature, it is achieved energy-conservation.

DPN is compared by step 511 with the goal pressure P0 under the closed valve state prestored in non-volatility memorizer address 3013. Advance to step 513 when DPN is less than P0, separate unit described later is stopped timer (timer 3) and is set to halted state, advance to step 521. DPN, when more than P0, advances to step 512, and HzV is compared with minimum running speed N1D when operating with 1 of storage in non-volatility memorizer address 3030. HzV advances to step 513 when more than N1D, separate unit described later is stopped timer (timer 3) and is set to halted state, advance to step 521. It is considered as separate unit shutdown condition in step 521 to be false, advances to the step 151 of Fig. 8.

When HzV is less than N1D, confirm that separate unit stops the state of timer (timer 3) in the step 514, if separate unit stops timer in stopping, separate unit is stopped timer and is set in counting, using in non-volatility memorizer address 2103 storage until the time TM3 that separate unit stops is stored in volatile storage address 1203 as TN3 remaining time of timer 3. Start the counting down of TN3 remaining time of timer 3 in step 515, advance to step 521. It is considered as parallel operation start condition in step 521 to be false, advances to the step 151 of Fig. 8.

When separate unit stops during timer is not off in the step 514, confirm that timer 3 is whether in counting, advances to step 521 in counting in step 516. It is considered as separate unit shutdown condition in step 521 to be false, advances to the step 151 of Fig. 8. When counting terminates and is in done state, advance to step 522.

It is considered as separate unit shutdown condition in step 522 to set up, makes the operating of the pump carrying out changed speed operation of storage in VNO stop in step 523, advance to the step 151 of Fig. 8.

Then, the parallel operating for the step 160 of Fig. 8 stops the details that confirmation processes, and illustrates with Figure 13.

In Figure 13, step 600 confirms SRP. SRP is more than 1, advance to step 610. In step 600, SRP is 0, confirm that whether the cooling fan that the operating relative to motor and converter arranged in water supply installation works independently is on-stream in step 601, cooling fan makes the operating of cooling fan stop when on-stream in step 602, advances to step 610.

In step 610 AMV is compared with the load current value stopping parallel operating prestored in non-volatility memorizer. When being 3 with load current value A2D when stopping 2 parallel operatings of address 3042, operating number when operating number is 2, load current value A3D when stopping 3 parallel operatings with address 3044 compares. DPN, when parallel stopping more than load current value, is stopped pressure with the parallel operating prestored in non-volatility memorizer and compares by AMV in step 611. When being 3 with discharge side pressure P 2D when stopping 2 parallel operatings of address 3022, operating number when operating number is 2, discharge side pressure P 3D when stopping 3 parallel operatings with address 3024 compares. Advance to step 613 when DPN deficiency initiation pressure parallel, parallel stopping timer (timer 2) described later is set to halted state, advances to step 621. Step 621 is considered as parallel shutdown condition be false, advances to the step 161 of Fig. 8.

In the not enough parallel situation stopping load current value of AMV or step 611, HzV, when parallel stopping more than pressure, is compared by DPN in step 612 with the parallel speed that stops prestored in non-volatility memorizer in step 610. When being 3 with running speed N2D when stopping 2 parallel operatings of address 3032, operating number when operating number is 2, running speed N3D when stopping 3 parallel operatings with address 3034 compares. HzV advances to step 613 when starting parallel to stop more than speed, the timer (timer 1) that starts parallel described later is set to halted state, advances to step 621. Step 621 is considered as parallel shutdown condition be false, advances to the step 161 of Fig. 8.

When HzV deficiency starts to stop speed parallel, step 614 confirms the state stopping timer (timer 2) parallel, if stopping timer parallel in stopping, being set in counting by stopping timer parallel, being stored in what non-volatility memorizer address 2102 stored in volatile storage address 1202 as TN2 remaining time of timer 2 until the parallel time TM2 stopped. Step 615 starts the counting down of TN2 remaining time of timer 2, advances to step 621. Step 621 is considered as parallel shutdown condition be false, advances to the step 161 of Fig. 8.

Step 614 when stopping parallel during timer is not off, confirm that timer 2 is whether in counting, advances to step 621 in counting in step 616. Step 621 is considered as parallel shutdown condition be false, advances to the step 161 of Fig. 8. When counting terminates and is in done state, advance to step 622.

It is considered as parallel shutdown condition in step 622 to set up, step 623 make the operating of the pump carrying out changed speed operation of storage in VNO stop, the next pump (carrying out the pump of constant speed operating) of the pump stopped numbering being stored by step 624 as the pump carrying out changed speed operation, in step 625 the pump carrying out changed speed operation carrying out constant speed operating it is set to changed speed operation and starts running, advancing to the step 161 of Fig. 8.

As mentioned above, in the present embodiment, converter is arranged in a part for the housing of motor, it is used in converter the temperature detector arranged, detect the case temperature of multiple motor or the temperature of multiple converter, when carrying out the motor that operates or converter has exceeded set point of temperature, the converter of motor controlling not operate is sent the instruction of operating. And then, when the motor stopped has exceeded set point of temperature, the converter controlling this motor is sent the instruction of operating. Thus, when motor or converter have exceeded set point of temperature, even if when the reduction of pressure of supply water not occurring or not being above the load current value of load current value, control device and also add pump and carries out operating it is thus possible to realize load dispersion.

[embodiment 2]

In embodiment 1, when the motor stopped is in the condition of high temperature, the converter controlling to have exceeded the motor in the stopping of set point of temperature is sent the instruction of operating, make motor rotate thereby through with motor linkage the cooling fan that works realize the cooling of motor. On the other hand, the present embodiment 2 is characterised by, when the motor stopped or converter have exceeded set point of temperature, the motor or converter that have exceeded set point of temperature is not sent the instruction of operating. It reason for this is that, when without the motor of cooling fan, during to operating, the motor that reaches a high temperature sends the instruction of operating the temperature of motor may be made to raise further. Additionally, in the converter that the operating of cooling fan and the instruction of the operating/stopping to motor transmission do not link, the equally possible temperature making converter that indicates sending operating raises further.

Hereinafter, use accompanying drawing that embodiment 2 is described.

First, about structure, the data content of storage part, communication data content, it is Fig. 1 to Fig. 7 similarly to Example 1, therefore omits the description. Wherein, in the present embodiment, it is contemplated that for be absent from by make motor rotate and with the situation of cooling fan (the cooling fan 25 of Fig. 2) that works of motor linkage ground.

In addition, in the control flow of embodiment 2, Figure 13 and the embodiment 1 of the details of stopping confirmation process that Fig. 8 of main control flow process, Figure 10 of details of explanation Stress control process, explanation separate unit pumping turn Figure 12 of details of stopping confirmation process, explanation operates parallel are identical, therefore omit the description.

Firstly, for the details that the single pump operation start confirmation of the step 120 of the main control flow chart 8 in embodiment 2 processes, illustrate with Figure 14.

In Figure 14, in step 210-2, the current discharge side pressure DPN of water supply installation of storage in volatile storage address 1000 being confirmed, the discharge side pressure P on that DPN and the water supply installation prestored in non-volatility memorizer address 3011 are started running compares.

DPN is when more than Pon, and being considered as separate unit operation start condition in step 221-2 is false, and advances to step 121. When DPN is less than Pon, step 211-2 confirming, whether the pump that the next one to operate is the condition of high temperature, in step 212-2, the pump numbering PNO that the next one of storage in volatile storage address 1006 to operate is stored in volatile storage address 1005 as the pump VNO carrying out changed speed operation when not being the condition of high temperature, afterwards, step 222-2 is advanced to.

The next pump to operate is the condition of high temperature in step 211-2, it is never the pump numbering selecting to carry out changed speed operation in the pump of the condition of high temperature in step 213-3, is updated to this numbering, advances to step 222-2.

Step 222-2 is considered as separate unit operation start condition set up, step 223-2 starts the operating of the pump carrying out changed speed operation of storage in VNO, the pump numbering that the next one of volatile storage address 1006 to carry out operate in step 224-2 is updated to the pump of the next numbering of the pump carrying out changed speed operation, advances to the step 121 of Fig. 8.

Then, for the main control flow chart 8 in embodiment 2 step 140 parallel operation start confirmation process details, illustrate with Figure 15.

Figure 15 is divided into Figure 15 A and Figure 15 B for the convenience of paper, but continuous by symbol A, B. Figure 15 A and Figure 15 B is merged into Figure 15 and illustrates by the following description. In Figure 15, it is step 417-2 and step 418-2 with the difference of Figure 11 of the details of the parallel operation start confirmation process illustrated in embodiment 1, is identical in addition, below therefore, difference is only described.

Confirming that in step 416-2 timer is whether in counting, when counting terminates and is in done state, advances to step 417-2, in step 417-2, the next pump to operate advances to step 422-2 when not being the condition of high temperature. When the next pump to operate is the condition of high temperature, it is never the pump numbering selecting to carry out changed speed operation in the pump of the condition of high temperature in step 418-2, is updated to this numbering, advances to step 422-2. Other steps are identical with Figure 11.

As mentioned above; in the present embodiment; when the motor stopped or converter have exceeded set point of temperature; the motor or converter that have exceeded set point of temperature are not sent the instruction of operating; thus when without cooling fan motor; the motor having reached high temperature when being prevented from operating sends the instruction of operating and makes the temperature of motor or converter raise further, it is possible to realize the protection of the motor in stopping or converter.

[embodiment 3]

The present embodiment 3 is characterised by, when the motor operated or converter have exceeded set point of temperature, the motor or converter that have exceeded set point of temperature does not send the instruction of stopping. Thus, it is prevented that make because making the motor of the condition of high temperature stop with motor linkage the cooling fan that works stop, making the temperature in motor increase. And then, by separating control by being used for carrying out the pressure controlled pump carrying out changed speed operation with the pump carrying out operating to cool down at high operating temperatures, so that load dispersion, and carry out stable Stress control.

Hereinafter, the present embodiment 3 is illustrated with accompanying drawing.

First, about structure, the data content of storage part, communication data content, it is Fig. 1 to Fig. 7 similarly to Example 1, therefore omits the description.

In addition, in the control flow of the present embodiment 3, Fig. 8 of main control flow process, Figure 10 that separate unit pumping turns the Fig. 9 starting the details that confirmation processes, the details that Stress control processes are described is described, Figure 11 of details of parallel operation start confirmation is described processing and embodiment 1 identical, therefore omit the description.

Single pump operating firstly, for the step 150 of the main control flow chart 8 in embodiment 3 stops the details that confirmation processes, and illustrates with Figure 16.

In Figure 16, the difference of the Figure 12 stopping the details of confirmation process with the single pump operating illustrated in embodiment 1 is step 530-2 and step 532-2, step 533-2, is identical in addition, below therefore, difference is only described.

After being considered as the establishment of separate unit shutdown condition in step 522, step 530-2 carries out the pump of changed speed operation when being the condition of high temperature, the next pump that the pump carrying out changed speed operation is numbered is stored by step 532-2 as the pump carrying out changed speed operation, step 533-2 starts to carry out the operating of the pump of changed speed operation, advances to the step 151 of main control flow chart 8. Step 530-2 carries out the pump of changed speed operation when being not the condition of high temperature, make the operating carrying out the pump of changed speed operation stop in step 531-2, advance to the step 151 of Fig. 8. Other steps are identical with Figure 12. So, the motor or converter that have exceeded set point of temperature are separated control with motor or the converter not less than set point of temperature. That is, Stress control (unit number control) only carries out with normal pump.

Then, the parallel operating for the step 160 of the main control flow chart 8 in embodiment 3 stops the details that confirmation processes, and illustrates with Figure 17.

Figure 17 is divided into Figure 17 A and Figure 17 B for the convenience of paper, but continuous by symbol A, B. Figure 17 A and Figure 17 B is merged into Figure 17 and illustrates by the following description. In Figure 17, the difference of the Figure 13 stopping the details of confirmation process with the parallel operating in explanation embodiment 1 is step 630-2 and step 633-2, is identical in addition, below therefore, difference is only described.

Step 622-2 is considered as after parallel shutdown condition sets up, step 630-2 carries out the pump of changed speed operation when being not the condition of high temperature, make the operating carrying out the pump of changed speed operation stop in step 633-2, advance to step 634-2. Other steps are identical with Figure 13.

As described in the present embodiment 3, by be used for carrying out pressure controlled pump and the pump carrying out operating to cool down at high operating temperatures carrying out changed speed operation separate control when, the stopping carrying out converter as illustrated in fig. 18 judges. Temperature in order to reduce motor preferably reduces rotating speed at high operating temperatures, in addition, if able to only use the water yield for carrying out pressure controlled pump supply necessity carrying out changed speed operation, the pump then operated to cool down is in the Stress control of Figure 10 processes, by step 300 to step 302, rotating speed is made to be gradually lowered.

In Figure 18, when there is the instruction of stopping of self-control device in step 720, advance to step 712. Even if be absent from the instruction of the stopping of self-control device in step 720, when HzN is below the minimum speed NMIN of the motor prestored in non-volatility memorizer address 3003 in step 711, also advance to step 712. The operating making motor in step 712 stops. When HzN has exceeded NMIN in step 711, step 713 continues the operating of motor.

Also reduce with the cooling effectiveness cooling down fan of motor linkage ground work when rotating speed reduces, it is impossible to expect sufficient cooling effect. Therefore, when the pump under being in the condition of high temperature decreases below the rotating speed of regulation, it is preferable that make the operating of motor stop. So can not expect under when the situation of cooling effect or cooling are fully and for supplying water unnecessary, make the operating of motor stop.

As mentioned above, in the present embodiment, when the motor operated or converter have exceeded set point of temperature, the motor or converter that have exceeded set point of temperature are not sent the instruction of stopping, thus, it is prevented that make because making the motor of the condition of high temperature stop with motor linkage the cooling fan that works stop so that temperature in motor rises. Additionally, by separating control by being used for carrying out the pressure controlled pump carrying out changed speed operation with the pump carrying out operating to cool down at high operating temperatures, so that load dispersion, and carry out stable Stress control.

[embodiment 4]

The present embodiment 4 is characterised by, exceed in order to make motor or converter to transship and prespecified setting operate, when motor or converter have exceeded set point of temperature, the converter of motor controlling to stop is sent the instruction of operating, makes pump operate parallel.

Namely, even if when the load current value of motor carrying out operating has exceeded the setting determined as load current value, before this motor carrying out operating exceedes set point of temperature, control the above-mentioned converter of this motor carrying out operating and also do not send and drop slow-revving instruction.

Additionally, before the motor carrying out operating exceedes set point of temperature, the converter of the motor that control does not operate is not sent the instruction of operating.

And then, when the motor carrying out operating has exceeded set point of temperature, carrying out the rotating speed rotating speed less than the discharge lift (closedown lift) met under closed valve state of the motor for pressure controlled speed controlling, the rotating speed of the above-mentioned motor having exceeded set point of temperature is more than the rotating speed discharging lift under meeting closed valve state, the converter controlling carrying out the motor for pressure controlled speed controlling is sent the instruction shut down.

By allowing rotating speed to rise before reaching a high temperature at motor or converter, it is possible to make the output of every pump increase, carry out the operating of higher efficiency. And then no matter which kind of arranges environment can both play maximum ability.

Hereinafter, use accompanying drawing that the present embodiment 4 is described.

In the present embodiment 4, converter is in the step 303 of Figure 10, when being accelerated to carry out Stress control indicating, allow more than higher limit and N1A, N2A, N3A of running speed under each operating number, accelerate to the maximum speed NMAX of the motor of the non-volatility memorizer address 3002 considering the efficiency of pump and safety. Restriction under maximum speed is set herein, the temperature being not configured to prevent motor or converter when continuously running rises, but the pump performance characteristic having because of each pump, rotating speed, output is improved also because efficiency is decreased without the speed improved even if existing, so for the operating preventing poor efficiency, and consider that the rotating shaft of motor is arranged for the load of rotating speed.

By more than N1A, N2A, N3A ground setting speed, as shown in figure 19, the scope that can supply water with 1 pump becomes big. It is said that in general, pump efficiency when carrying out high speed rotating uprises, so when making the least possible operating number with high rotation speed operation, overall in hgher efficiency of water supply installation, it is possible to achieve energy-conservation.

As shown in figure 19, when calculating terminal pressure constant control, goal pressure P0, P1, P2, P3 are the values identical with the target discharge side pressure HS of water supply installation, when discharge pressure constant control, P0, P1, P2, P3 are different values respectively, and HS is also the value identical or different from the one party in P0, P1, P2, P3.

When the present embodiment 4, the scope that can supply water with 1 pump can change, so P1, P2, P3 can change (being denoted as P1 ', P2 ', P3 ' in order to this is distinguished in the present embodiment 4). Thus parallel operation start pressure and parallel operating stop pressure is not the setting prestored in 3021 to address, non-volatility memorizer address 3024, but correspondingly changes with the water supply coverage of 1 pump. Therefore, parallel operating stopping speed changing similarly.

P1 ' during by parallel operation start, P2 ', P3 ' are set to motor or converter has exceeded the discharge side pressure DPN of water supply installation in moment of set point of temperature. When making second pumping turn, being preferably operated with the rotating speed N2D ' when starting is the rotating speed meeting DPN (being P1 ' in this situation) under closed valve state, it is relative to frequency hence with pump performance, flow is directly proportional with linear function, discharge side pressure is directly proportional with quadratic function, the pump similarity law that current value is directly proportional with cubic function, obtains with following formula (1).

N2D '=(P2 ' �� P2) �� N2D}^0.5����(1)

Equally, the rotating speed N3D ' following formula (2) during operation start when making the 3rd pumping turn obtains.

N3D '=(P3 ' �� P3) �� N3D}^0.5����(2)

In order to reduce the temperature of motor at high operating temperatures, it is preferable that reduce rotating speed, it is considered in water supply, motor reduces rotating speed, carry out weakening operating. It is also contemplated for this point, when parallel operating stops, being considered as parallel shutdown condition according to following 2 conditions and set up.

1. stop the output of the signal representing that motor has exceeded set point of temperature, the situation of the parallel shutdown condition establishment shown in Figure 13,

2. the rotating speed deficiency having exceeded the motor of set point of temperature meets the situation of the rotating speed discharging lift under closed valve state.

As described in Example 3, when by be used for carrying out pressure controlled pump and the pump operated to cool down at high operating temperatures carrying out changed speed operation separate control, add the 3rd condition further.

3. carrying out the rotating speed of the motor for pressure controlled speed controlling less than the rotating speed discharging lift meeting under closed valve state, the rotating speed having exceeded the motor of set point of temperature is the situation meeting more than the rotating speed discharging lift under closed valve state.

Namely, rotating speed (HzV) decreases below the parallel operating stopping pressure of output under closed valve state, and (operating number is P2 ' when being 2, P3 ' when 3) required for rotating speed: parallel operating stops speed, and (operating number is N2D ' when being 2, it is N3D ' when 3), refer to this pump with HzV operating to not contribution, the idle state of supplying water. Therefore, when rotating speed decreases below parallel operating stopping speed, the stopping that operating parallel is made.

As mentioned above, in the present embodiment, exceed in order to make motor or converter to transship and prespecified setting operate, when motor or converter have exceeded set point of temperature, the converter of motor controlling to stop is sent the instruction of operating, makes pump operate parallel. Namely, even if when the load current value of motor carrying out operating has exceeded the setting determined as load current value, before this motor carrying out operating exceedes set point of temperature, control the above-mentioned converter of this motor carrying out operating and also do not send and drop slow-revving instruction. Additionally, before the motor carrying out operating exceedes set point of temperature, the converter of the motor that control does not operate is not sent the instruction of operating. And then, when the motor carrying out operating has exceeded set point of temperature, carrying out the rotating speed of the motor for pressure controlled speed controlling less than the rotating speed discharging lift meeting under closed valve state, when the rotating speed of the above-mentioned motor having exceeded set point of temperature is meet more than the rotating speed discharging lift under closed valve state, the converter controlling carrying out the motor for pressure controlled speed controlling is sent the instruction shut down.

Thus, by allowing the rising of rotating speed at motor or converter before reaching a high temperature, it is possible to make motor operation to the limit, make the output of every pump increase, carry out the operating of higher efficiency. And then no matter which kind of arranges environment can both play maximum ability.

Additionally, the present invention is not limited to above-described embodiment, including various variation. Such as, embodiment is arranged in a part for housing for motor according to converter, the temperature of case temperature or multiple converter that the temperature detector being used in converter arranging detects multiple motor is illustrated, it may also be converter and motor are splits, the temperature detector each arranged with converter and motor detects respective temperature. Additionally, be illustrated for 3 pumps, but number of units is not limited to 3, it is possible to apply in the water system more than 2. Additionally, above-described embodiment for ease of understanding illustrates that the present invention describes in detail, it is not limited to all structures that must possess explanation. Furthermore it is possible to a part for the structure of certain embodiment to be replaced into the structure of other embodiments, or in the structure of certain embodiment, add the structure of other embodiments. Additionally, a part for the structure for each embodiment, it is possible to add, delete, replace other structures.

Symbol description

9 ... housing, 10-1,10-2,10-3 ... pump,

17 ... pressure sensing cell, 20-1,20-2,20-3 ... motor,

25 ... cooling fan, 7,30-1,30-2,30-3 ... converter,

33-1,33-2,33-3,43 ... storage part, 40 ... control device.

Claims (10)

1. a water supply installation, it is characterised in that including:

Multiple pumps;

The plurality of pump is rotated respectively multiple motor of driving;

Multiple converters that the rotating speed making the plurality of motor changes respectively;

Common land is arranged on the pressure sensing cell of the discharge side of the plurality of pump; With

Control the control device of the operating/stopping of the plurality of converter,

The plurality of converter is arranged in a part for the housing of the periphery of the respective armature constituting the plurality of motor, the temperature detector being arranged in this converter detect the temperature of this housing,

Described control device uses described temperature detector to detect the case temperature of the plurality of motor or the temperature of the plurality of converter, when carrying out the motor that operates or converter has exceeded set point of temperature, the converter of motor controlling not operate is sent the instruction of operating.

2. water supply installation as claimed in claim 1, it is characterised in that:

The converter controlling this motor having exceeded set point of temperature, when the motor stopped or converter have exceeded set point of temperature, is not sent the instruction of operating by described control device.

3. a water supply installation, it is characterised in that including:

Multiple pumps;

The plurality of pump is rotated respectively multiple motor of driving;

Multiple converters that the rotating speed making the plurality of motor changes respectively;

Common land is arranged on the pressure sensing cell of the discharge side of the plurality of pump; With

Control the control device of the operating/stopping of the plurality of converter,

The plurality of converter is arranged in a part for the housing of the periphery of the respective armature constituting the plurality of motor, the temperature detector being arranged in this converter detect the temperature of this housing,

The plurality of motor is respectively provided with the cooling fan worked in linkage by making this motor rotate,

Described control device uses described temperature detector to detect the case temperature of the plurality of motor or the temperature of the plurality of converter, when the motor stopped or converter have exceeded set point of temperature, the converter of motor having exceeded set point of temperature described in controlling is sent the instruction of operating.

4. the water supply installation as according to any one of claims 1 to 3, it is characterised in that:

In water supply installation or periphery be provided with the second cooling fan that the operating with described motor and described converter do not work alone in linkage,

Described control device uses described temperature detector, detect the case temperature of the plurality of motor or the temperature of the plurality of converter, any person in the plurality of motor or the plurality of converter has exceeded set point of temperature, make described second cooling fan running, when the plurality of motor or the plurality of converter are all not less than set point of temperature, do not make described second cooling fan running.

5. water supply installation as claimed in claim 1, it is characterised in that:

When the running speed of described motor is lower than setting, the converter of the described control device motor to having exceeded set point of temperature described in control sends the instruction shut down.

6. water supply installation as claimed in claim 3, it is characterised in that:

When carrying out the motor that operates or converter has exceeded set point of temperature, the converter of the motor having exceeded set point of temperature described in controlling is not sent the instruction of stopping by described control device.

7. the water supply installation as described in claim 1 or 6, it is characterised in that:

The described motor having exceeded set point of temperature or converter are separated control with motor or the converter not less than set point of temperature by described control device.

8. a water supply installation, it is characterised in that including:

Multiple pumps;

The plurality of pump is rotated respectively multiple motor of driving;

Multiple converters that the rotating speed making the plurality of motor changes respectively;

Common land is arranged on the pressure sensing cell of the discharge side of the plurality of pump; With

Control the control device of the operating/stopping of the plurality of converter,

The plurality of converter is arranged in a part for the housing of the periphery of the respective armature constituting the plurality of motor, the temperature detector being arranged in this converter detect the temperature of this housing,

Described control device uses described temperature detector to detect the case temperature of the plurality of motor, even if when the load current value of motor carrying out operating has exceeded the setting determined as load current value, before this motor carrying out operating exceedes set point of temperature, control the described converter of this motor carrying out operating and do not send and drop slow-revving instruction.

9. water supply installation as claimed in claim 8, it is characterised in that:

Before the motor carrying out operating exceedes set point of temperature, the converter of the motor that control does not operate is not sent the instruction of operating by described control device.

10. water supply installation as claimed in claim 8, it is characterised in that:

When the motor carrying out operating has exceeded set point of temperature,

When the rotating speed of the motor carried out for pressure controlled speed controlling is less than the rotating speed discharging lift met under closed valve state, and described in exceeded the rotating speed of motor of set point of temperature when being meet more than the rotating speed discharging lift under closed valve state,

The converter controlling carrying out the motor for pressure controlled speed controlling is sent the instruction shut down by described control device.