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1. 发明专利

JP2000303514A PRESSURIZED FEEDWATER SYSTEM FOR INTERMEDIATE OR HIGH- RISE BUILDING 失效
公开(公告)号：JP2000303514A
公开(公告)日：2000-10-31
申请号：JP2000106837
申请日：2000-04-07
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI
IPC分类号： E03B5/00 , E03B11/16 , E03C1/00
摘要： PROBLEM TO BE SOLVED: To provide a pressurized feedwater system for an intermediate or high-rise building capable of always effectively utilizing the feedwater pressure in the city water pipes with a simple structure and capable of sufficiently reducing the cost. SOLUTION: Water is supplied to the faucets 10a to 10c in the lower floors through a feedwater pipe 3 directly from a city water distributing pipe 1, and the feedwater for the faucets 10d to 10f in the higher floors is pressurized by a booster pump 4 whose suction pipe is connected to the feedwater pipe 3 and is fed through a feedwater pipe 8. Since the city water in the lower zone is fed only by the hydraulic pressure in the city water pipe, depressurization can be dispensed with, and the booster pump 4 is operated only to obtain the pressurization necessary for the higher zone, so that the hydraulic pressure in the city water pipe is sufficiently utilized. As a result, depressurization in the lower zone is unnecessary, so that necessary energy can be reduced, and the water supply to the lower zone can be constantly maintained even without a bypass line.

2. 发明专利

JPH09329085A OPERATION CONTROL METHOD FOR WATER SUPPLY SYSTEM 失效
公开(公告)号：JPH09329085A
公开(公告)日：1997-12-22
申请号：JP6319297
申请日：1997-03-17
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI , ISHIDA SHINOBU
IPC分类号： F04D15/00 , F04B49/06
摘要： PROBLEM TO BE SOLVED: To prevent a pump from being restopped by a pump protecting function when the pump stopped by service interruption is restarted at power restoration. SOLUTION: The delivery pressure of an inverter-control pump 8 to deliver water of a water line main pipe 1 connected to the water line main pipe 1 to demand side 14 (14a to 14d) through a suction pressure tank 11 and a water supply pipe 13 is detected with a pressure sensor PS2. The pump 8 is permitted to be continuously driven only in the first operation after the turning on or restoration of electric power by a water supply device having a protecting function which stops the operation of the pump 8 when both a certain detected pressure and pressures detected in the delivery side after pressurized period are lower than or equal to specified value, even when delivery pressure is not more than the specified value over a prescribed period of time.

3. 发明专利

JPH0893680A DUAL INVERTER AND ITS APPLIED APPARATUS 失效
公开(公告)号：JPH0893680A
公开(公告)日：1996-04-09
申请号：JP22449394
申请日：1994-09-20
申请人： HITACHI LTD
发明人： SATO KOICHI , YOSHIDA MASAO , OSHIGA TAKAYUKI , KUNII HIROSHI , ENDO TSUNEHIRO , HONMA SATOSHI
IPC分类号： F04D15/00 , F04D27/00 , H02M7/48 , H02P5/74 , H02P7/74
摘要： PURPOSE: To house an outside controller and relay circuit part in an inverter for miniaturizing, simplifying and reducing cost of them. CONSTITUTION: A complete double system is constituted of first and second leak circuit breakers ELB1, ELB2, inverters INB1, INB2, motors 5-1, 5-2 and pumps 4-1, 4-2. The inverters INV1, INV2 are connected to each other through a signal line for transmitting failure and running condition signals, and a signal line of a sensor unit is connected directly to the inverter. Thus, an advanced controller and relay circuit unit are not needed in the outside. The system is simplified, miniaturized and lightened, cost reduction is realized, the number of part item is reduced and the reliability is improved.

4. 发明专利

JP2000303515A PRESSURE-BOOSTING FEED WATER SYSTEM FOR MID-TO-HIGH-RISE BUILDING 失效
公开(公告)号：JP2000303515A
公开(公告)日：2000-10-31
申请号：JP2000106839
申请日：2000-04-07
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI
IPC分类号： E03B5/00 , E03B11/16 , E03C1/00
摘要： PROBLEM TO BE SOLVED: To provide a pressure-boosting feed water system for a mid-to-high-rise building that has a simple arrangement, can make effective use of feed water pressure in a water pipe at any times, and can reduce costs sufficiently. SOLUTION: Water is fed directly from a city water distribution pipe 1 to faucets 10a-10c on lower stories via a feedwater pipe 3, and the feed of water to faucets 10d-10f on higher stories is effected via a feed water pipe 8 after pressure is boosted by a booster pump 4 whose suction pipe is connected to the feedwater pipe 3. Since water is fed to the lower-story zone by means of only the hydraulic pressure of a water pipe, the need for pressure reduction is eliminated, and since the booster pump 4 needs merely to work for providing the pressure boosting required for the higher-story zone, the hydraulic pressure of the water pipe is fully utilized, with the result that the energy required can be reduced as the need for pressure reduction in the lower-story zone is also eliminated. Also, the fear of water feed to the lower-story zone being interrupted can be eliminated even in the absence of a bypass line.

5. 发明专利

JPH07331711A PRESSURE INTENSIFYING WATER SUPPLY SYSTEM FOR HIGH MIDDLE LAYER BUILDING 失效
公开(公告)号：JPH07331711A
公开(公告)日：1995-12-19
申请号：JP13226594
申请日：1994-06-14
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI
IPC分类号： E03B11/16 , E03B5/00 , F04D13/02
摘要： PURPOSE:To always effectively utilize the water supply pressure of an aqueduct pipe and sufficiently decrease the cost by simple constitution. CONSTITUTION:Water is supplied to faucets 10a-10c of lower floors directly from an aqueduct distribution pipe 1 through a water supply pipe 3, and water is supplied to faucets 10d-10f of higher floors through a water supply pipe 8 after raising the pressure by means of a booster pump 4 connecting the suction pipe to the water supply pipe 3. Because water is supplied to the low layer zone by only water pressure of the aqueduct pipe, it is unnecessary to decrease the pressure, and the booster pump 4 works only enough to obtain pressure intensification required for a high layer zone and water pressure of the aqujeduct pipe is sufficiently utilized, as a result, pressure decrease in the low layer zone is unnecessary, in addition to this, necessary energy can be reduced, and there is no possibility to cease water supply to the low layer zone even without a bypass duct.

6. 发明专利

JPS62294795A WATER SUPPLY SYSTEM USING STABILIZING VALVE 失效
公开(公告)号：JPS62294795A
公开(公告)日：1987-12-22
申请号：JP13590686
申请日：1986-06-13
申请人： HITACHI LTD
发明人： SATO KOICHI , HOUSHIYOU TADAYUKI , ISHIDA SHINOBU , KUNII HIROSHI , TAGAWA YUKIO , INAGAKI MASANOBU
IPC分类号： F04D15/00
摘要： PURPOSE:To lower the cost by starting up a pump by means of a pressure detection means provided on the secondary side of a stabilizing valve and stopping it by means of a pressure detection means provided on the primary side. CONSTITUTION:The first and the second pressure switch 61, 62 are provided on the secondary side of stabilizing valves 21, 22 on the discharge side of pumps 11, 12 and the third pressure switches 63, 64 are provided on the primary side. The start up of the pump is mainly performed by the pressure switches 61, 62 and the stoppage of the pump is performed by the pressure switches 63, 64. Accordingly the pump can be controlled without using an expensive flow sensor.

7. 发明专利

JPS6299696A AIR SUPPLY DEVICE FOR PRESSURE TANK TYPE WATER FEED EQUIPMENT 失效
公开(公告)号：JPS6299696A
公开(公告)日：1987-05-09
申请号：JP23764285
申请日：1985-10-25
申请人： HITACHI LTD
发明人： KUNII HIROSHI , SATO KOICHI
IPC分类号： F04B23/02 , F04D13/16
摘要： PURPOSE:To recover water in an air tank certainly, by setting a control valve which opens for a period of required recovery time calculated by a control part, to drive a jet pump, when it is detected by a detector that the air pressure in a pressure tank rises to the jet pump start air pressure, which was calculated by the control part. CONSTITUTION:A lift-up height H which is actually set by an operator, is input by means of an input part 13. The present air pressure in a pressure tank 4 is detected by a detector 14, and it is decided whether it rises above the jet pump start air pressure or not, which was calculated by a control part 20. When the detected air pressure is higher than the jet pump start air pressure, a control valve 12 is opened, through an output part 15, by closing an opening/closing switch 26 for a period of required recovery time, by the control part 20. In this way, as a jet pump 10 is driven, this pump 10 starts to recover the water in an air tank 5, while discharging the water in the pressure tank 4 to a water receive tank 1. Accordingly, the water in the air tank 5 can be recovered certainly, because the jet pump 10 is driven for a period of time which is calculated based on the relation between the air pressure in the pressure tank 4 and the lift-up height, even if the air pressure in the pressure tank 4 varies.

8. 发明专利

JPH10259622A WATER SUPPLY SYSTEM DIRECT-CONNECTED TO CITY WATER 失效
公开(公告)号：JPH10259622A
公开(公告)日：1998-09-29
申请号：JP5832498
申请日：1998-03-10
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI
IPC分类号： E03B5/02 , E03B11/16
摘要： PROBLEM TO BE SOLVED: To save the energy of a water supply system used in direct connection with city water. SOLUTION: A water supply system comprises a water supply pipe 20 to feed water from a distributing pipe 1 to an end hydrant 22, at least one of the electric motor-driven pumps 10 and 11 which is installed in mid way to the water supply pipe 20 and delivers water to the end hydrant 22, an original pressure sensor 7 which is installed in the water supply pipe 20 in the upstream from the electric motor-driven pumps 10 and 11 and detects the original pressure of a water source, a low water level detecting means 23 and 24 which are installed in the water supply pipe 20 in the downstream from the electric motor-driven pumps 10 and 11 and detects low water level, and a delivery pressure sensor 18 for detecting delivery pressure. Also it is provided with a control means 21 which outputs those signals to stop the pumps 10 and 11 when the detected original pressure becomes a value exceeding that obtained by adding a specified resistance between both pressure sensors to a specified pressure on the delivery side and the low water level detecting means 23 and 24 detect the low water level, supply water directly by the pressure of the distributing pipe 1, and start the pumps 10 and 11 when the detected delivery pressure falls below a specified start pressure, and a drive means 21 to supply variable power to the electric-motor driven pumps 10 and 11 based on the signals from the control means 21.

9. 发明专利

JPH10227293A WATER SUPPLY DEVICE FOR SERVICE WATER 失效
公开(公告)号：JPH10227293A
公开(公告)日：1998-08-25
申请号：JP6145998
申请日：1998-03-12
申请人： HITACHI LTD
发明人： SATO KOICHI , YOSHIDA MASAO , OSHIGA TAKAYUKI , KUNII HIROSHI , ENDO TSUNEHIRO , HONMA SATOSHI
IPC分类号： F04D15/00 , F04B49/06 , F04D27/00
摘要： PROBLEM TO BE SOLVED: To simplify a control device and to reduce costs by providing a water supply device for waterworks with pressure detecting means for detecting a suction side pressure and a display unit for displaying the frequency of electric power supplied to an electric motor by an inverter. SOLUTION: A display unit 13 of an inverter panel is constituted by segemented LEDs or liquid crystals, for example. A touch switch 14 sends a command of RUN/STOP. A touch switch 15 sends a command for setting operation conditions. Touch keys 16, 17 increase or decrease an address when calling a command of writing to the memory. A data key 18 inputs alphanumeric data and a key 19 confirms an operation of the command. Since a state of operation and failure is displayed by the display unit 13 of the inverter panel, a display unit is not required on a control panel. This can simplify a control device and reduce costs.

10. 发明专利

JPH08326109A WATER SUPPLY DIRECT-CONNECTION WATER SERVICE SYSTEM 失效
公开(公告)号：JPH08326109A
公开(公告)日：1996-12-10
申请号：JP13651895
申请日：1995-06-02
申请人： HITACHI LTD
发明人： SATO KOICHI , KUNII HIROSHI
IPC分类号： E03B1/00 , E03B5/00 , E03B11/16 , F04B49/00
摘要： PURPOSE: To realize stabel supply by decreasing the start frequency of a pump in a water line direct connection water service system. CONSTITUTION: A second pressure sensor 7 provided at a suction pipe 2 connected to a water main 1 and a first pressure sensor 18 provided at a water feed pipe 20 are compared with each other, and by means of a controller 21, a pump is stopped in a case in which the origin pressure of the water main 1 has become, at discharge side required pressure, for more than a fixed time higher than a value that considers resistance between both pressure sensors 7, 18, and the pump is started again in a case in which the pressure of the water main 1 has become lower than a target pressure. After this condition has been realized, whether or not a small water amount use state exists is decided, and the pump is stooped in the case of a small water amount state.

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