IL126493A - Room pressure control apparatus having feedforward and feedback control and method - Google Patents
Room pressure control apparatus having feedforward and feedback control and methodInfo
- Publication number
- IL126493A IL126493A IL12649398A IL12649398A IL126493A IL 126493 A IL126493 A IL 126493A IL 12649398 A IL12649398 A IL 12649398A IL 12649398 A IL12649398 A IL 12649398A IL 126493 A IL126493 A IL 126493A
- Authority
- IL
- Israel
- Prior art keywords
- room
- air
- flow rate
- exhaust
- set point
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000004378 air conditioning Methods 0.000 claims abstract description 5
- 230000008595 infiltration Effects 0.000 claims description 13
- 238000001764 infiltration Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 8
- 238000013528 artificial neural network Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 34
- 239000003517 fume Substances 0.000 description 24
- 238000001816 cooling Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 10
- 238000011217 control strategy Methods 0.000 description 10
- 238000009499 grossing Methods 0.000 description 10
- 230000020169 heat generation Effects 0.000 description 10
- 230000004044 response Effects 0.000 description 10
- 230000006870 function Effects 0.000 description 7
- 238000013459 approach Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000013480 data collection Methods 0.000 description 2
- 238000012417 linear regression Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001473 noxious effect Effects 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229930091051 Arenine Natural products 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001537 neural effect Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005293 physical law Methods 0.000 description 1
- 238000009715 pressure infiltration Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/041—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a variable is automatically adjusted to optimise the performance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/048—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators using a predictor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
- F24F2011/0002—Control or safety arrangements for ventilation for admittance of outside air
- F24F2011/0004—Control or safety arrangements for ventilation for admittance of outside air to create overpressure in a room
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Medical Informatics (AREA)
- Software Systems (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Physics (AREA)
- Fuzzy Systems (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Fluid Pressure (AREA)
- Feedback Control In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/965,982 US6033302A (en) | 1997-11-07 | 1997-11-07 | Room pressure control apparatus having feedforward and feedback control and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL126493A0 IL126493A0 (en) | 1999-08-17 |
| IL126493A true IL126493A (en) | 2001-07-24 |
Family
ID=25510770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL12649398A IL126493A (en) | 1997-11-07 | 1998-10-08 | Room pressure control apparatus having feedforward and feedback control and method |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6033302A (ja) |
| EP (1) | EP0915300A3 (ja) |
| JP (1) | JPH11218354A (ja) |
| KR (1) | KR19990045076A (ja) |
| CN (1) | CN1107205C (ja) |
| AU (1) | AU743848B2 (ja) |
| CA (1) | CA2237236C (ja) |
| IL (1) | IL126493A (ja) |
| NZ (1) | NZ332250A (ja) |
| TW (1) | TW367399B (ja) |
Families Citing this family (57)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8172546B2 (en) | 1998-11-23 | 2012-05-08 | Entegris, Inc. | System and method for correcting for pressure variations using a motor |
| US6716359B1 (en) * | 2000-08-29 | 2004-04-06 | United States Filter Corporation | Enhanced time-based proportional control |
| DE10118224C1 (de) * | 2001-04-12 | 2002-10-31 | Stiebel Eltron Gmbh & Co Kg | Verfahren zur Einstellung eines Soll-Luftvolumenstroms bei einem Lüftungsgerät und Lüftungsgerät |
| US6644092B1 (en) | 2001-05-14 | 2003-11-11 | Robert J. Oppel | Automatic calibration of pressure sensors for paint booth airflow control |
| US7117045B2 (en) * | 2001-09-08 | 2006-10-03 | Colorado State University Research Foundation | Combined proportional plus integral (PI) and neural network (nN) controller |
| SG155062A1 (en) * | 2002-12-09 | 2009-09-30 | Hudson Technologies Inc | Method and apparatus for optimizing refrigeration systems |
| US6758744B1 (en) | 2003-03-17 | 2004-07-06 | Rongqing Dai | Building interior air pressure control system |
| KR20050010527A (ko) * | 2003-07-21 | 2005-01-28 | 바이오공조시스템주식회사 | 바이오 룸 차압제어 시스템 및 그 제어방법 |
| US7212887B2 (en) * | 2004-01-20 | 2007-05-01 | Carrier Corporation | Service and diagnostic tool for HVAC systems |
| US7841381B2 (en) | 2004-04-22 | 2010-11-30 | Stirling Technology, Inc. | Heat and energy recovery ventilators and methods of use |
| US8292598B2 (en) * | 2004-11-23 | 2012-10-23 | Entegris, Inc. | System and method for a variable home position dispense system |
| US20060112701A1 (en) * | 2004-11-30 | 2006-06-01 | Halliburton Energy Services, Inc. | Methods and systems for controlling rate and output of heat exchanger fluids |
| RU2294491C2 (ru) * | 2004-12-08 | 2007-02-27 | Юрий Петрович Нешитов | Способ регулировки давления воздуха в помещении и устройство для его осуществления |
| US8753097B2 (en) * | 2005-11-21 | 2014-06-17 | Entegris, Inc. | Method and system for high viscosity pump |
| WO2007061956A2 (en) | 2005-11-21 | 2007-05-31 | Entegris, Inc. | System and method for a pump with reduced form factor |
| US7850431B2 (en) * | 2005-12-02 | 2010-12-14 | Entegris, Inc. | System and method for control of fluid pressure |
| US8025486B2 (en) * | 2005-12-02 | 2011-09-27 | Entegris, Inc. | System and method for valve sequencing in a pump |
| WO2007067358A2 (en) * | 2005-12-02 | 2007-06-14 | Entegris, Inc. | System and method for pressure compensation in a pump |
| KR20080073778A (ko) * | 2005-12-02 | 2008-08-11 | 엔테그리스, 아이엔씨. | Ｏ링 없는 로우 프로파일 피팅 및 피팅 조립체 |
| US8083498B2 (en) | 2005-12-02 | 2011-12-27 | Entegris, Inc. | System and method for position control of a mechanical piston in a pump |
| US7878765B2 (en) * | 2005-12-02 | 2011-02-01 | Entegris, Inc. | System and method for monitoring operation of a pump |
| EP1958039B9 (en) * | 2005-12-02 | 2011-09-07 | Entegris, Inc. | I/o systems, methods and devices for interfacing a pump controller |
| CN101360678B (zh) * | 2005-12-05 | 2013-01-02 | 恩特格里公司 | 用于泵的误差容积系统和方法 |
| TWI402423B (zh) * | 2006-02-28 | 2013-07-21 | Entegris Inc | 用於一幫浦操作之系統及方法 |
| US7494265B2 (en) * | 2006-03-01 | 2009-02-24 | Entegris, Inc. | System and method for controlled mixing of fluids via temperature |
| US7684446B2 (en) * | 2006-03-01 | 2010-03-23 | Entegris, Inc. | System and method for multiplexing setpoints |
| US9605856B2 (en) * | 2006-03-02 | 2017-03-28 | Siemens Industry, Inc. | Air pressure control system and method |
| JP2008232531A (ja) * | 2007-03-20 | 2008-10-02 | Toshiba Corp | リモート性能監視装置及びリモート性能監視方法 |
| US7966104B2 (en) * | 2007-03-26 | 2011-06-21 | Siemens Corporation | Apparatus and method for the control of the indoor thermal environment having feed forward and feedback control using adaptive reference models |
| US20090065596A1 (en) * | 2007-05-09 | 2009-03-12 | Johnson Controls Technology Company | Systems and methods for increasing building space comfort using wireless devices |
| US20080277486A1 (en) * | 2007-05-09 | 2008-11-13 | Johnson Controls Technology Company | HVAC control system and method |
| US20080281439A1 (en) * | 2007-05-09 | 2008-11-13 | Johnson Controls Technology Company | Building automation systems and methods |
| US20090067363A1 (en) * | 2007-07-31 | 2009-03-12 | Johnson Controls Technology Company | System and method for communicating information from wireless sources to locations within a building |
| US8727227B2 (en) | 2008-06-30 | 2014-05-20 | Hewlett-Packard Development Company, L.P. | Optimizing fluid flow distribution in a structure |
| US8326464B2 (en) * | 2008-08-29 | 2012-12-04 | Trane International Inc. | Return fan control system and method |
| JP5085716B2 (ja) * | 2010-11-02 | 2012-11-28 | 株式会社東芝 | サーバ室管理用の空調システム、およびこれを利用したサーバ管理用システム、空調制御方法 |
| JP5778475B2 (ja) * | 2011-05-13 | 2015-09-16 | アズビル株式会社 | 室圧制御システム |
| CN102914023B (zh) * | 2011-08-02 | 2015-04-08 | 珠海格力电器股份有限公司 | 空调器的控制方法、终端和系统 |
| US10653044B2 (en) | 2013-01-10 | 2020-05-12 | International Business Machines Corporation | Energy efficiency based control for a cooling system |
| EP2866117B1 (en) * | 2013-10-25 | 2017-03-15 | Fourdeg Oy | Distributed adaptive and predictive heating control system and method |
| EP2910865B1 (en) | 2014-02-21 | 2016-11-23 | Plum Sp. z o.o. | System amd method for controlling a fan insufflating ait into a protected space, especially in fire ventilation for the protection of escape routes |
| TW201600172A (zh) * | 2014-06-20 | 2016-01-01 | 金永德實驗室設備有限公司 | 智慧氣簾排氣櫃 |
| US10684030B2 (en) | 2015-03-05 | 2020-06-16 | Honeywell International Inc. | Wireless actuator service |
| US9851727B2 (en) | 2015-05-28 | 2017-12-26 | Carrier Corporation | Coordinated control of HVAC system using aggregated system demand |
| US10839302B2 (en) | 2015-11-24 | 2020-11-17 | The Research Foundation For The State University Of New York | Approximate value iteration with complex returns by bounding |
| US10352578B2 (en) | 2016-06-09 | 2019-07-16 | Board Of Regents, The University Of Texas System | Adaptive optimization for dynamic room pressurization control |
| US9953474B2 (en) | 2016-09-02 | 2018-04-24 | Honeywell International Inc. | Multi-level security mechanism for accessing a panel |
| CN109932899B (zh) * | 2017-12-15 | 2022-02-08 | 蓝星（北京）技术中心有限公司 | 化工产品生产中反应温度的优化控制方法及系统 |
| CN112567182B (zh) | 2018-06-11 | 2023-02-10 | 布罗恩-努托恩有限责任公司 | 具有从神经网络导出的自动流量平衡的通风系统 |
| US12007732B2 (en) | 2019-07-12 | 2024-06-11 | Johnson Controls Tyco IP Holdings LLP | HVAC system with building infection control |
| US11960261B2 (en) | 2019-07-12 | 2024-04-16 | Johnson Controls Tyco IP Holdings LLP | HVAC system with sustainability and emissions controls |
| US11761660B2 (en) * | 2019-01-30 | 2023-09-19 | Johnson Controls Tyco IP Holdings LLP | Building control system with feedback and feedforward total energy flow compensation |
| US10832509B1 (en) | 2019-05-24 | 2020-11-10 | Ademco Inc. | Systems and methods of a doorbell device initiating a state change of an access control device and/or a control panel responsive to two-factor authentication |
| US10789800B1 (en) | 2019-05-24 | 2020-09-29 | Ademco Inc. | Systems and methods for authorizing transmission of commands and signals to an access control device or a control panel device |
| US11274842B2 (en) | 2019-07-12 | 2022-03-15 | Johnson Controls Tyco IP Holdings LLP | Systems and methods for optimizing ventilation, filtration, and conditioning schemes for buildings |
| US11714393B2 (en) | 2019-07-12 | 2023-08-01 | Johnson Controls Tyco IP Holdings LLP | Building control system with load curtailment optimization |
| EP3940497B1 (en) * | 2020-07-15 | 2023-03-15 | Siemens Schweiz AG | Maximum flow setting |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1161140A (en) * | 1979-11-09 | 1984-01-24 | Graeme J. Lowe | Control of the atmosphere in an enclosure |
| US4817864A (en) * | 1986-08-28 | 1989-04-04 | Honeywell Inc. | Temperature compensation for vav system |
| US5541833A (en) * | 1987-03-30 | 1996-07-30 | The Foxboro Company | Multivariable feedforward adaptive controller |
| US5090303A (en) * | 1990-09-28 | 1992-02-25 | Landis & Gyr Powers, Inc. | Laboratory fume hood control apparatus having improved safety considerations |
| US5092227B1 (en) * | 1990-09-28 | 1995-02-14 | Landis & Gyr Powers Inc | Apparatus for controlling the ventilation of laboratory fume hoods |
| US5764579A (en) * | 1990-10-01 | 1998-06-09 | American Auto-Matrix, Inc. | System for controlling laboratories with fume hoods |
| US5304093A (en) * | 1992-01-17 | 1994-04-19 | Phoenix Controls Corporation | Method and apparatus for controlling a fluid flow valve |
| CA2089339C (en) * | 1992-02-11 | 2002-03-12 | Manfred L. Belusa | Space pressurization control system for high containment laboratories |
| US5720658A (en) * | 1992-02-11 | 1998-02-24 | Belusa; Manfred L. | Space pressurization control system for high containment laboratories |
| US5385505A (en) * | 1993-07-02 | 1995-01-31 | Phoenix Controls Corporation | Pressure maintenance system for substantially sealed space |
| US5810657A (en) * | 1994-11-22 | 1998-09-22 | Lighthouse Associates, Inc. | Controller to maintain a certain set of environmental parameters in an environment |
| US5573181A (en) * | 1995-01-06 | 1996-11-12 | Landis & Gyr Powers, Inc. | Global control of HVAC distribution system |
-
1997
- 1997-11-07 US US08/965,982 patent/US6033302A/en not_active Expired - Lifetime
-
1998
- 1998-05-08 CA CA002237236A patent/CA2237236C/en not_active Expired - Fee Related
- 1998-10-05 NZ NZ332250A patent/NZ332250A/xx unknown
- 1998-10-06 TW TW087116579A patent/TW367399B/zh active
- 1998-10-08 IL IL12649398A patent/IL126493A/en not_active IP Right Cessation
- 1998-10-15 AU AU89324/98A patent/AU743848B2/en not_active Ceased
- 1998-10-27 EP EP98120138A patent/EP0915300A3/en not_active Withdrawn
- 1998-11-06 CN CN98123958A patent/CN1107205C/zh not_active Expired - Fee Related
- 1998-11-06 KR KR1019980047494A patent/KR19990045076A/ko not_active Application Discontinuation
- 1998-11-09 JP JP10317453A patent/JPH11218354A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1224139A (zh) | 1999-07-28 |
| JPH11218354A (ja) | 1999-08-10 |
| IL126493A0 (en) | 1999-08-17 |
| EP0915300A2 (en) | 1999-05-12 |
| KR19990045076A (ko) | 1999-06-25 |
| AU743848B2 (en) | 2002-02-07 |
| CN1107205C (zh) | 2003-04-30 |
| EP0915300A3 (en) | 2001-11-28 |
| AU8932498A (en) | 2000-06-08 |
| CA2237236C (en) | 2003-09-16 |
| NZ332250A (en) | 1999-03-29 |
| US6033302A (en) | 2000-03-07 |
| TW367399B (en) | 1999-08-21 |
| CA2237236A1 (en) | 1999-05-07 |
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