WO1990010180A1 - Commande par zones amelioree pour systeme de climatisation - Google Patents

Commande par zones amelioree pour systeme de climatisation Download PDF

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Publication number
WO1990010180A1
WO1990010180A1 PCT/AU1990/000068 AU9000068W WO9010180A1 WO 1990010180 A1 WO1990010180 A1 WO 1990010180A1 AU 9000068 W AU9000068 W AU 9000068W WO 9010180 A1 WO9010180 A1 WO 9010180A1
Authority
WO
WIPO (PCT)
Prior art keywords
air conditioning
air
conditioning system
zone
air volume
Prior art date
Application number
PCT/AU1990/000068
Other languages
English (en)
Inventor
Edward Campbell Jacob
Kurt Arthur Schober
Arthur Charlton Blain
Original Assignee
Vadelas Pty. Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vadelas Pty. Limited filed Critical Vadelas Pty. Limited
Priority to KR1019910700969A priority Critical patent/KR920701762A/ko
Priority to AU51573/90A priority patent/AU644585B2/en
Publication of WO1990010180A1 publication Critical patent/WO1990010180A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • 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
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/875—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling heat-storage apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature

Definitions

  • the present invention relates to a centralised zonal air control system having an improved inbuilt facility for control of zonal environmental conditions within a building or like installation.
  • the invention relates to an air conditioning plant having means therewithin for control of zones in an air conditioned space.
  • the said gates To regulate the air flow, the said gates must be manually or motor operated with the result that achieving the required air delivery to maintain the set temperature for the zone is often a matter of chance.
  • registers are either at the extremities of the ductwork tentacles or they are positioned at various positions along the ductwork in the case of ductwork within the air conditioned space.
  • a further problem with the gates and vanes is that they are usually located in positions which are difficult to gain access to thus making adjustment of air flow a tedious and difficult exercise.
  • presently known systems also utilise a temperature sensor mounted in a suitable position within the zone.
  • the sensor is designed to convert temperature into an electrical impulse which either activates or deactivates the compressors and/or booster elements depending upon the zone air temperature requirements and the system configuration.
  • zone temperature This can become a very expensive method of maintaining zone temperature as the existing sensors do not have any control over air quantity or velocity discharge from the duct register; the latter being a much - cheaper means for controlling zone temperature.
  • zonal control is effected by individual solid state, electronic or pneumatic controls at a location remote from the main plant. These sensors are wired back to a main control box which adjusts the operation of the main refrigeration plant hence enabling regulation of the zonal temperature.
  • Zonal temperature control generally is effected by the adjustment to air volume delivered to a zone and/or air temperature.
  • Certain prior art systems have employed microprocessor control of gate valves in air conditioning ducts which are actuated in response to sensing by remote sensors.
  • a split system This generally comprises a condenser unit and a fan cool unit which is connected to but is usually remote from the condenser unit.
  • the fan cool unit is joined to ductwork which can have air delivery control gates.
  • Control of the air conditioned space is generally achieved by the positioning of a temperature sensor in a selected position within the air conditioned space usually in the vicinity of the return air register.
  • the sensor enables control of air delivery to a particular zone by relaying signals to the compressors in the said condenser unit.
  • the individual fan segments of the air conditioning unit are mutually exclusive so as to control each zone dedicated to its corresponding fan unit. This results in a capacity within the unit to cool and heat different zones at the same time where necessary by reverse cycle operation.
  • the present invention seeks to provide an air conditioning system whereby the facility for zonal control of the air conditioned space is located at or in the central control plant.
  • the present invention provides: a unitary air conditioning system adapted to provide independent temperature control to a plurality of zones in a building or like installation, comprising: a plurality of temperature sensors, at least one provided in each one of said zones; at least one compressor; a plurality of fans adjustable in speed; and, a central processing unit; wherein, said central processing unit is adapted to receive a temperature signal from each sensor, compare said temperature signal with a preset reference temperature signal, and independently operate each of said fans by appropriate adjustment of said fan speed such that a proportional volume of conditioned air is supplied from said compressor(s) to said zone consequently causing said temperature signal from said zone to match said temperature reference signal appertaining to that zone.
  • the present invention provides an air conditioning system further comprising: a plurality of air volume sensors, at least one provided in each one of said zones; said compressor(s) being adjustable in output capacity; said central processing unit being further adapted to receive air volume signals from said air volume sensors, compare said air volume signals with preset air volume reference signals, independently operate each of said fans by appropriate adjustment of said fan speed such that said air volume sensor signals from each of said zones are consequently caused to match said air volume reference signals, and, further, adjust the output capacity of said compressor, if required, such that said air volume sensor signals from each of said zones are caused to match said air volume reference signals.
  • the central processing unit further automatically modulates the refrigeration and/or heating capacity of the refrigerator/heat exchanger unit in response to the signals received from said temperature sensors and/or said air volume sensors.
  • the present invention provides a system further comprising a waste heat recovery and storage system adapted to provide supplementary heat or re-heat to any of said zones responsive to the heating and/or cooling requirements of said building.
  • the air conditioning system is embodied wherein said waste heat recovery and storage system is adapted to provide pre-heating for a conventional hot water service.
  • a preferred implementation of the air conditioning system of the present invention provides said central processing unit with a modem for connection to a monitor, a P.C., and/or centralised computer system, such that an operator may monitor and/or control the operation of said air conditioning system.
  • the air conditioning system of the present invention is also preferably implemented wherein said central processing system is provided with memory to store past history details such that system operation and diagnostic data may be manually or automatically analysed.
  • Figure 1 shows a plan view of the condenser unit according to a preferred embodiment of the invention
  • Figure 2 shows a side elevational view of the unit of Figure 1;
  • Figure 3 shows an end elevational view of the compressor end of the air conditioning unit
  • Figure 4 shows a side view of the air conditioning unit on the return air side
  • Figure 5 shows an end view of the air conditioning unit from the fan end;
  • Figure 6 shows a schematic diagram of a typical refrigeration circuit for the unitary air conditioning system of the present invention.
  • FIG. 7 shows a block diagram representation of the central processing unit functions, inputs and outputs.
  • FIG 1 there is shown a plan view of a air conditioning unit 1 according to a preferred embodiment of the invention.
  • the unit essentially comprises an outer casing or housing 2, at least one fan assembly 3, at least one compressor unit 4 and an evaporator 5.
  • the air conditioning unit is illustrated with six fan assemblies and two compressors, the unit may be assembled with one or more fan assemblies and one or more compressors according to requirements.
  • the compressor/s 4 are conventional compressors, likewise the evaporator s 5.
  • Each one fan in the battery of fan units 3 is controlled individually and operate individually to control a predetermined zone in response to zonal conditions.
  • the fan units are fed with either fresh air or return air from a common return air duct in the direction of arrow 6 (see figure 5).
  • the return air is drawn into each zone fan depending upon zonal requirements.
  • Temperature sensors in each zone sense the zonal temperature and transmit a corresponding signal to a microprocessor which is pre programmed to effect a comparison between preset zonal temperature and actual zonal temperature.
  • the microprocessor will activate the fan for the respective zone to redress the air imbalance.
  • the imbalance may be redressed by adjusting fan speed which in turn regulates air volume delivery to the zone or alternatively, by adjusting the temperature of the air by reverse cycle.
  • a microprocessor or mini computer facility within the machine is capable of directing the zonal control. Once programmed, the machine is capable of virtually automatic control of conditioned air.
  • the machine is capable of virtually automatic control of conditioned air.
  • problems have occured whereby one zone temperature sensor may interfere with or override the sensor of an adjacent zone not divided by a physical barrier (such as a wall), due to the effect that the air from one zone may have on the sensor of another zone.
  • the main air conditioning plant in trying to accommodate the demands of both sensors has unnecessary loads placed on it which can increase power consumption.
  • Controlling of air flow to regulate the air temperature of a zone by using the present invention will reduce cost as the dependence upon temperature sensors to control compressors and/or heating elements to regulate zone air temperature will be reduced or eliminated.
  • Fan speed variable air flow
  • the zones can be individual rooms or offices or they can be sections of larger areas.
  • the present invention precludes the need for peripheral booster heating in the ducts, as is used in prior art systems, due to the combined compressor and/or air delivery control all of which takes place in the one unit.
  • variable speed motors which drive the fans take the place of the previously used variable air volume units which regulate air volume to each zone and are individually installed in the ceiling spaces above the zone being served.
  • the compressor/s used in this system are multistage and multispeed and are controlled by a specially designed micro-processor (not shown) .
  • the unit is intended to operate within its own internal electronic system for control logic for any combination of zone and variable air volume and cooling - heating requirement.
  • One major advantage of the present system is the efficiency and economies which have been enabled in the installation and operation of systems by the elimination of external ancillary apparatus at peripheries which have been previously installed and used to control air volume and temperature.
  • Figures 3, 4 and 5 show an end, side and opposite end elevational views respectively.
  • Variable speed motors 7 are shown in Figure 5 and it is these motors which effectively create the zonal control in response to sensor signal transfer to the microprocessor.
  • Figure 6 illustrates a typical refrigeration circuit for a reverse cycle multiple zone variable air volume air cooled unitary air conditioner, in accordance with the present invention.
  • the figure illustrates a plurality of fans 8, in this case eight fans being shown, being adapted to provide eight different zones in the building or like installation with the conditioned air, responsive to temperature sensors and/or air volume sensors provided within the zones.
  • the zonal conditions, representing one of the signal received from the temperature and/or air volume sensors are provided into a central processing unit, for comparison of the temperatures and air volumes with reference levels previously set by an operator.
  • the central processing unit will be described hereinafter with reference to Figure 7.
  • a particular fan in response to the temperature and/or air volume conditions within a particular zone, a particular fan is adapted to be controlled by the computer, such that the fan motor speed varies the amount of air which is supplied from the heat exchanger unit, represented by the numeral 9 in Fig. 6.
  • the other main components in the typical refrigeration circuit of Fig. 6 include an optional waste heat recovery storage unit 10, a pair of refrigerant compressors of variable speed 11, a discharge gas oil separator 12, connected to the compressors by the hot gas refrigerant line 14 - the output thereof also connected to the return oil vessel 13, a refrigerant reversing valve 15, connected to a suction accumulator 16 via a return vapour refrigerant line 17.
  • the suction accumulator 16 is also connected to the compressors 11 via return vapour contamination controls 18.
  • the return oil vessel 13 is also connected via an outdoor refrigerant/air heat exchanger 19 which is then connected via a bi-flow liquid drier 20 to the refrigerant expansion control system 21, which consequently controls the indoor refrigerant air heat exchanger 9.
  • FIG. 7 is shown an electrical/electronic block diagram of the air conditioning control system in accordance with the present invention.
  • the computer generally designated by the numeral 22 has a number of modules preferably provided therein, including a " variable speed fan output, a synchronisation logic circuit, a computer module, a power supply, and a time date function unit.
  • a number of software modules are also preferably provided in the computer, including software to operate the variable speed fan loops, an input output module, a logic processor, a diagnostic package, communications packages, and networking packages.
  • the computer is preferably connected to a plurality of zone reference/feedback circuits, including temperature sensors 23, pressure transmitters and/or air volume sensors 24. The reference inputs are also inputted to the computer 22 via bus 25.
  • a diagnostic display keyboard 26, a diagnostic thermal printer 27 and/or a modem 28 are also preferably inputted to the computer 22.
  • On the output side of the computer 22 is provided a plurality of variable speed air supply fans 29, status output signals via bus 30, a plurality of compressors 31, preferably multistage and multispeed, a waste heat recovery unit 32, and a waste heat re-heat control unit 33.
  • a network bus 34 may optionally be provided to other units, and in air cooled models, rather than water cooled models of air conditioning systems, condensor fans 35 may also be provided.
  • the present invention has a number of distinct advantages over prior art air conditioning systems. Due to it's unique provision of an inbuilt multiple zone variable volume system, the requirement for site installation of zone variable air volume units in ceiling spaces is removed.
  • the central processing unit of the present invention provides a highly intelligent level of control and monitoring data, removing the need for separate air conditioning or building management control systems.
  • An offshoot of the present invention which is adventageous in present day society, is the provision of a continuous waste heat recovery system during both heating and cooling cycles - this can provide pre-heating of domestic portable water supplies, or other conventional water supply units.
  • the present invention therefore provides an air conditioning system, which, due to the incorporation of a highly sophisticated central processing unit which analyses conditions within each zone area and controls the temperature and air volume to each zone individually, depending on demand requirements, provides a number of distinct advantages over presently known air conditioning systems.
  • the central processing unit in monitoring the zone conditions, automatically modulates the refrigeration and heating capacity to the various zone or zones and adjusts the compressor capacity to deliver only the required cooling or heating capacity - thereby dramatically reducing the operating costs of the air conditioning system.
  • the air conditioning unit in accordance with the present invention is a high quality technologically advanced air conditioner which can provide cooling, de-humidification, heating and circulation of air for comfort and industrial applications. It is extremely compact and is capable of serving from one to a plurality of zones, with each zone receiving the benefit of independent temperature control with fixed air quantity,, or, alternatively, independent temperature control with variable air volume - dependent on the requirement of the building and the air conditioning applications engineer.
  • the units preferably operate as a direct expansion R22 refrigeration system designed for reverse cycle/heat pump operation with the added facility that a waste heat recovery and storage system is incorporated to provide supplementary heat or re-heat to any zone or zones, depending on the cooling or heating requirements of a given building. As mentioned, the waste heat recovery and storage facility can optionally provide pre-heating for domestic hot water services.
  • the air conditioning units also incorporate the facility for any zone or zones in a multiple zone unit to operate on a fixed air quantity, with the remaining zones operating on variable air quantity.
  • Capacity variation of the refrigeration system is accomplished by the use of variable capacity, hermatic - compressors operating in a multiplex direct expansion system. This allows for the indoor and outdoor heat exchangers to operate on either heating or cooling duty providing waste heat recovery and re-heat for any zone or zones requiring heating input to balance conditions whilst the system is operating in cooling mode.
  • control of the air conditioning unit is accomplished through the incorporation of a highly sophisticated central processing unit which analyses conditions within each zone area and controls the temperature and air volume to each zone individually depending on demand requirements.
  • the central processing unit in monitoring the zone conditions automatically modulates the refrigeration and heating capacity to the various zone or zones, and adjusts the compressor capacity to deliver only the required cooling or heating capacity thereby dramatically reducing the operating costs of the air conditioning system.
  • the central processing unit also provides the facility for modem monitoring of the total building and system operation back to a centralised computer with the building or in the manufacturer's/consulting engineer's offices. This results in a reduction in nuisance service calls as should a complaint from a particular area be made regarding conditions this can be monitored and assessed by an engineer in the consultant or manufacturer's office before service personnel are sent to check the equipment.
  • the units can be supplied in either air cooled or water cooled configuration which provides a higher degree of installation flexibility of the equipments.
  • the integrated central processing unit in the unit also has the capability of past history diagnostics and print out of system operation and diagnostic data through the interfacng of a thermal printer.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Le système de climatisation unitaire décrit (Figs. 6 et 7), qui est conçu pour assurer une commande indépendante de la température dans plusieurs zones d'un bâtiment ou installation similaire, comprend plusieurs détecteurs de température (23), un dans chaque zone, au moins un compresseur (11), plusieurs ventilateurs (8) et une unité de traitement centrale (22). L'unité centrale (22) reçoit les signaux thermiques provenant des détecteurs de température (23) et, après comparaison avec des signaux de référence, règle les ventilateurs (8) en réglant la vitesse de leurs moteurs. Le système comprend également de préférence des détecteurs de volume d'air (24) dans chaque zone.
PCT/AU1990/000068 1989-02-22 1990-02-22 Commande par zones amelioree pour systeme de climatisation WO1990010180A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019910700969A KR920701762A (ko) 1989-02-22 1990-02-22 공조시스템
AU51573/90A AU644585B2 (en) 1989-02-22 1990-02-22 Improved zonal control of air conditioning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ2878 1989-02-22
AUPJ287889 1989-02-22

Publications (1)

Publication Number Publication Date
WO1990010180A1 true WO1990010180A1 (fr) 1990-09-07

Family

ID=3773731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1990/000068 WO1990010180A1 (fr) 1989-02-22 1990-02-22 Commande par zones amelioree pour systeme de climatisation

Country Status (3)

Country Link
KR (1) KR920701762A (fr)
NZ (1) NZ232650A (fr)
WO (1) WO1990010180A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258744A (en) * 1991-08-12 1993-02-17 Carrier Corp Centralised air conditioning control.
GB2270579A (en) * 1992-09-14 1994-03-16 Yu Feng Enterprise Co Ltd A micro-computer operated control device for air-conditioned system.
WO2002004871A2 (fr) * 2000-07-07 2002-01-17 Convec Aps Dispositif de ventilation et batiment comportant un tel dispositif de ventilation
EP1260778A1 (fr) * 2001-05-23 2002-11-27 allrounder winter world gmbH & co. kg Piste de ski couverte
WO2004070283A1 (fr) * 2003-02-07 2004-08-19 A/S Ribe Jernindustri Agregat, unites, systeme et procede de ventilation, ce dernier comprenant des unites pouvant etre facilement connectees a d'autres unites, ainsi que commutateur de securite
AU780093B2 (en) * 2001-04-26 2005-03-03 Nordin Engineered Air Technologies Pty Ltd Air conditioning zone controller
WO2005050025A1 (fr) * 2003-10-23 2005-06-02 Ebm-Papst Landshut Gmbh Ventilateur comprenant un element a ecoulement laminaire a l'avant de l'ouverture d'aspiration
EP2102568A1 (fr) * 2006-12-29 2009-09-23 Carrier Corporation Algorithme de climatisation pour refroidissement libre de terminal d'eau
WO2018232030A1 (fr) * 2017-06-14 2018-12-20 Ross Joseph A Système de zonage pour équipement de climatisation
NO20200734A1 (no) * 2020-06-23 2021-12-24 Trox Auranor Norge As Ventilasjonsanordning med individuelt styrt tilluft
US11384951B2 (en) 2017-06-14 2022-07-12 Joseph A. Ross Zoning system for air conditioning (HVAC) equipment
US11454415B2 (en) 2017-11-23 2022-09-27 Carrier Corporation Hybrid electrocaloric heat pump system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100722008B1 (ko) * 2006-01-10 2007-05-28 박철수 건축물의 외피 시스템

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU515910B2 (en) * 1978-10-19 1981-05-07 Matsushita Electric Industrial Co., Ltd. Air conditioning system having a plurality of indoor units
AU536160B2 (en) * 1979-09-28 1984-04-19 Borg-Warner Corporation Microcomputer control for inverter-driven heat pump
AU541757B2 (en) * 1978-11-10 1985-01-17 Email Limited Air conditioner system
AU6701986A (en) * 1985-12-27 1987-07-02 Mitsubishi Denki Kabushiki Kaisha Air conditioning apparatus
AU567005B2 (en) * 1985-03-29 1987-11-05 Mitsubishi Denki Kabushiki Kaisha Duct type multizone air conditioning system
AU6702086A (en) * 1986-09-22 1988-03-31 Mitsubishi Denki Kabushiki Kaisha Air conditioning apparatus
EP0315573A2 (fr) * 1987-11-02 1989-05-10 Hitachi, Ltd. Conditionneur d'air avec mécanisme d'admission d'air extérieur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU515910B2 (en) * 1978-10-19 1981-05-07 Matsushita Electric Industrial Co., Ltd. Air conditioning system having a plurality of indoor units
AU541757B2 (en) * 1978-11-10 1985-01-17 Email Limited Air conditioner system
AU536160B2 (en) * 1979-09-28 1984-04-19 Borg-Warner Corporation Microcomputer control for inverter-driven heat pump
AU567005B2 (en) * 1985-03-29 1987-11-05 Mitsubishi Denki Kabushiki Kaisha Duct type multizone air conditioning system
AU6701986A (en) * 1985-12-27 1987-07-02 Mitsubishi Denki Kabushiki Kaisha Air conditioning apparatus
AU6702086A (en) * 1986-09-22 1988-03-31 Mitsubishi Denki Kabushiki Kaisha Air conditioning apparatus
EP0315573A2 (fr) * 1987-11-02 1989-05-10 Hitachi, Ltd. Conditionneur d'air avec mécanisme d'admission d'air extérieur

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258744A (en) * 1991-08-12 1993-02-17 Carrier Corp Centralised air conditioning control.
GB2258744B (en) * 1991-08-12 1995-03-01 Carrier Corp Temperature control system for zoned space
GB2270579A (en) * 1992-09-14 1994-03-16 Yu Feng Enterprise Co Ltd A micro-computer operated control device for air-conditioned system.
GB2270579B (en) * 1992-09-14 1996-08-28 Yu Feng Enterprise Co Ltd Improved micro-computer operated control device for air-conditioning system
WO2002004871A2 (fr) * 2000-07-07 2002-01-17 Convec Aps Dispositif de ventilation et batiment comportant un tel dispositif de ventilation
WO2002004871A3 (fr) * 2000-07-07 2002-09-26 Convec Aps Dispositif de ventilation et batiment comportant un tel dispositif de ventilation
US6990825B2 (en) 2000-07-07 2006-01-31 Danfoss A/S Ventilating device and a building comprising such a ventilating device
AU780093B2 (en) * 2001-04-26 2005-03-03 Nordin Engineered Air Technologies Pty Ltd Air conditioning zone controller
EP1260778A1 (fr) * 2001-05-23 2002-11-27 allrounder winter world gmbH & co. kg Piste de ski couverte
WO2004070283A1 (fr) * 2003-02-07 2004-08-19 A/S Ribe Jernindustri Agregat, unites, systeme et procede de ventilation, ce dernier comprenant des unites pouvant etre facilement connectees a d'autres unites, ainsi que commutateur de securite
WO2005050025A1 (fr) * 2003-10-23 2005-06-02 Ebm-Papst Landshut Gmbh Ventilateur comprenant un element a ecoulement laminaire a l'avant de l'ouverture d'aspiration
US7670104B2 (en) 2003-10-23 2010-03-02 Ebm-Papst Landshut Gmbh Fan with laminar flow element in front of the suction hole
EP2102568A1 (fr) * 2006-12-29 2009-09-23 Carrier Corporation Algorithme de climatisation pour refroidissement libre de terminal d'eau
EP2102568A4 (fr) * 2006-12-29 2012-02-22 Carrier Corp Algorithme de climatisation pour refroidissement libre de terminal d'eau
EP2102568B1 (fr) 2006-12-29 2016-03-02 Carrier Corporation Algorithme de climatisation pour refroidissement libre de terminal d'eau
WO2018232030A1 (fr) * 2017-06-14 2018-12-20 Ross Joseph A Système de zonage pour équipement de climatisation
US11384951B2 (en) 2017-06-14 2022-07-12 Joseph A. Ross Zoning system for air conditioning (HVAC) equipment
US11454415B2 (en) 2017-11-23 2022-09-27 Carrier Corporation Hybrid electrocaloric heat pump system
NO20200734A1 (no) * 2020-06-23 2021-12-24 Trox Auranor Norge As Ventilasjonsanordning med individuelt styrt tilluft

Also Published As

Publication number Publication date
KR920701762A (ko) 1992-08-12
NZ232650A (en) 1992-02-25

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