WO2024040144A1 - Flux de fluide frigorigène variable à air variable (vavrf) - Google Patents

Flux de fluide frigorigène variable à air variable (vavrf) Download PDF

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Publication number
WO2024040144A1
WO2024040144A1 PCT/US2023/072355 US2023072355W WO2024040144A1 WO 2024040144 A1 WO2024040144 A1 WO 2024040144A1 US 2023072355 W US2023072355 W US 2023072355W WO 2024040144 A1 WO2024040144 A1 WO 2024040144A1
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WO
WIPO (PCT)
Prior art keywords
unit
airflow
refrigerant
air
indoor
Prior art date
Application number
PCT/US2023/072355
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English (en)
Inventor
Baalaganapathy MANOHAR
Ravi Shankar Srinivasan
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University Of Florida Research Foundation, Inc.
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Publication date
Application filed by University Of Florida Research Foundation, Inc. filed Critical University Of Florida Research Foundation, Inc.
Publication of WO2024040144A1 publication Critical patent/WO2024040144A1/fr

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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
    • F24F11/70—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
    • F24F11/77—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 controlling the speed of ventilators
    • 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
    • F24F11/30—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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems

Definitions

  • VAVRF VARIABLE AIR VARIABLE REFRIGERANT FLOW
  • VAVRF VARIABLE AIR VARIABLE REFRIGERANT FLOW
  • HVAC Heating, ventilation, and air conditioning
  • VAV Variable Air Volume
  • VRF Variable Refrigerant Flow
  • a VAV system is an air system that regulates the supply air volume flow rate with a damper located in an indoor VAV box to match the variation of the space cooling load in order to maintain the zone air temperature at the set temperature.
  • VRF technology was introduced in the 1980s, where a VRF system operates by having a constant speed internal fan to provide constant airflow; however, the VRF the system varies the amount of refrigerant and temperature of the refrigerant to cool the room with the help of a variable speed compressor and electronic expansion valves (EEV) (to match the space cooling load in order to maintain zone air temperature at a set temperature).
  • the VRF system operates on the direct expansion (DX) principle.
  • Embodiments of the present disclosure provide a new HVAC system and related methods that combine the efficiencies of VRF and VAV systems.
  • An exemplary system comprises a plurality of indoor units located in different zones of a building, each comprising a damper operable to modulate airflow through the indoor unit into a building space and a valve operable to modulate a flow of refrigerant through the indoor unit; an air handling unit having a supply fan that is configured to generate the airflow that is received by the plurality of indoor units; and a controller unit operable to control the damper and the valve simultaneously for each of the plurality of indoor units, wherein the controller unit is operable to control the supply fan and an amount of airflow generated by the supply fan.
  • An exemplary method comprises directing airflow through an air handling unit to a plurality of indoor units located in different zones of a building, each indoor unit comprising a damper operable to modulate airflow through the indoor unit into a building space and a valve operable to modulate a flow of refrigerant through the indoor unit; controlling, via a controller unit, an amount of airflow generated by a supply fan of the air handling unit; and controlling, via a controller unit, the damper and the valve simultaneously for each of the plurality of indoor units.
  • such methods and/or systems comprise an outdoor unit comprising a condensing unit and a compressor; wherein the outdoor unit is packaged with the air handling unit as a single unit; wherein the outdoor unit is physically separate from the air handling unit; and/or a duct pressure sensor located in ductwork connecting the air handling unit and the plurality of indoor units, wherein the controller unit is configured to receive a pressure reading from the duct pressure sensor and to adjust a speed of the supply fan of the air handling unit based on the pressure reading from the duct pressure sensor.
  • the controller unit is operable to control a temperature of the refrigerant flowing through an individual indoor unit; an individual indoor unit includes a refrigerant coil, an airflow sensor that measures a speed of the airflow, a first temperature sensor that measures a temperature of the airflow, and a second temperature sensor that measures a temperature of the refrigerant before and after exiting the refrigerant coil, wherein the controller unit is configured to receive sensor measurements from the airflow sensor, the first temperature sensor, and the second temperature sensor; the controller unit is operable to perform simultaneous heating and cooling operations in the different zones of the building being serviced by the air conditioning system; and/or the air handling unit further comprises a relief fan that controls building pressurization using pressure sensors.
  • operations of such methods and/or systems include controlling, via the controller unit, a temperature of the refrigerant flowing through an individual indoor unit; obtaining, via the controller unit, a measurement a speed of the airflow at an individual indoor unit; obtaining, via the controller unit, a temperature reading of the airflow at the individual indoor unit; obtaining, via the controller unit, a temperature reading of the refrigerant before and after exiting a refrigerant coil at the individual indoor unit; adjusting, via the controller unit and the damper and valve of the individual indoor unit, the speed of the airflow at the individual indoor unit, a flow of the refrigerant at the individual indoor unit, and the temperature of the refrigerant at the individual indoor unit based on the obtained measurement and readings; obtaining, by the controller unit, a pressure reading within ductwork connecting the air handling unit and the plurality of indoor units; adjusting, via the controller unit, a speed of the supply fan of the air handling unit based on the pressure reading; performing simultaneous heating and cooling
  • FIG.1 shows a schematic of a multi-split system air conditioning system.
  • FIG.12 shows a schematic of a multi-split system air conditioning system.
  • FIG. 2 shows a schematic illustrating the difference between a multi-split air conditioning system and a variable refrigerant flow (VRF) air conditioning system.
  • FIG.3 shows a schematic of a VRF indoor unit.
  • FIG.4 shows a schematic of an indoor unit (VAV reheat box) for a variable air volume (VAV) air conditioning system.
  • FIG. 5 shows a schematic of an indoor unit (VAVRF indoor unit) for an exemplary variable air variable refrigerant flow (VAVRF) air conditioning system in accordance with embodiments of the present disclosure.
  • FIG.6 shows a schematic of an exemplary VAVRF air conditioning system in accordance with embodiments of the present disclosure.
  • FIG.7 shows a schematic of an exemplary outdoor unit and an air handling unit of the VAVRF air conditioning system packaged as a single unit in accordance with embodiments of the present disclosure.
  • DETAILED DESCRIPTION [0018] The present disclosure describes various embodiments of a new HVAC system and apparatuses (and related methods) that combine the efficiencies of VRF and VAV systems.
  • An exemplary system is referred to as a Variable Air Variable Refrigerant Flow (VAVRF) system in that both the air volume (airflow) into conditioned spaces and the refrigerant flow and temperature can be varied simultaneously which increases efficiencies beyond those of conventional VRF and VAV systems.
  • VAVRF Variable Air Variable Refrigerant Flow
  • a split air conditioning system is popular in small residential apartments and small homes. They consist of an indoor unit and an outdoor unit.
  • the indoor unit has an evaporator coil and a small fan to blow cool air into a conditioned room
  • the outside unit has a condensing unit and a fan to reject hot air to the outside. Since each outdoor unit is paired with a single indoor unit, the split air-conditioning system may impair the aesthetic of a building having numerous rooms due to needing one outdoor unit for each room, which also increases the costs of installation and operations of such systems.
  • Multi-split air-conditioning systems were developed. Multi-split systems are similar to the single split system described above, except that multiple indoor units are connected to a single outdoor unit, as illustrated in FIG.1. [0021] The use of the multi-split system in a building reduced the problem of having too many outdoor condensing units and reduced project costs. However, multi-split systems came with their own set of issues. In the case of a single split system, the outdoor unit was controlled by a thermostat which switched the system on and off. This design was well-suited when there was only one room to control. However, the multi-split system also operated based on a single thermostat.
  • VRF Variable Refrigerant Flow
  • the control is achieved by continually varying the flow of refrigerant through an electronic expansion valve (EEV) or a PMV (pulse modulating valve) whose opening is determined by a controller receiving information from thermistor sensors in each indoor unit.
  • EEV electronic expansion valve
  • PMV pulse modulating valve
  • the indoor units are linked by a control wire to the outdoor unit which responds to the demand from the indoor units by varying its compressor speed to match the total cooling and/or heating requirements.
  • EEV Electronic Expansion Valve
  • PMV Pulse Modulating Valve
  • FIG.2 shows a schematic of the difference between a multi-split system and a VRF system.
  • the VRF system along with the EEV/PMV is paired along with an inverter driven scroll compressor that allows the compressor to ramp down proportionally based on a lesser demand in different circuits.
  • the capacity control range of the typical VRF system is impressive. For example, the compressor, based on heating cooling demand, can ramp down to 10% all the way from 100% capacity.
  • a heat pump VRF operation is simple and works based on a reversible vapor compression cycle. That means, during cooling, the indoor unit operates as an evaporator (cold coil) and the outdoor unit operates as a condenser (e.g., outdoor unit rejects heat to the outside environment), and during heating, the indoor and outdoor unit switch roles, such that the indoor unit will operate as a condenser and the outdoor unit will operate as the evaporator.
  • VRF-HR Heat recovery VRF
  • Two-pipe systems are normally used in VRF heat pump applications to provide cooling or heating only during the same operating mode.
  • Branch-circuit controllers are used with two-pipe systems to perform the following functions: (a) separate refrigerant into gas and liquid (via a liquid-gas separator); (b) ensure that zones in heating mode receive superheated gas; (c) ensure that zones in cooling mode receive subcooled liquid; and (d) facilitate removal of heat from one zone and apply it to a different zone.
  • Three-pipe systems are configured with a heating (hot gas refrigerant) pipe, a cooling (liquid refrigerant) pipe, and a return (suction) pipe.
  • Branch selectors are used with three-pipe systems and perform a similar function as branch-circuit controllers, directing the superheated gas to heating zones and subcooled liquid to cooling zones. Branch selectors do not require separators because they are connected to a three-pipe system.
  • each indoor unit is branched off from the three pipes using solenoid valves. An indoor unit requiring cooling will open its cooling (liquid) line and return (suction) line valves and act as an evaporator.
  • FIG. 3 provides a schematic of a VRF indoor unit.
  • VAV Variable Air Volume
  • VAV systems use indoor VAV boxes to control the volume of airflow to each zone.
  • VAV systems also contain a reheat coil to provide heat and/or to reheat the air to a more comfortable air temperature for the occupant.
  • a schematic of VAV box is as shown in FIG.4.
  • the VAV box controller responds by adjusting the position of the air valves or dampers within the VAV box or terminal to increase or decrease airflow.
  • the VAV air valve throttles the airflow matching the space requirements.
  • the temperature sensor located in the zone will detect a rise in temperature and request the VAV box to open the air valve and increase the amount of cool airflow.
  • the static pressure in the adjacent runout and trunk duct will decrease, resulting in increased airflow through the adjacent ductwork.
  • VAVRF Variable Air Variable Refrigerant Flow System
  • An exemplary VAVRF system includes an air handling unit (AHU) section that is responsible for air movement, which is in contrast to the VRF system in which air movement is provided by individual fans in each VRF indoor unit.
  • An exemplary VAVRF system further includes an outdoor unit section that supplies the refrigerant to a VAVRF controller (e.g. heat recovery box/branch selector box).
  • a refrigerant pipe is coupled to a pressure independent VAVRV indoor unit which contains airflow sensors, dampers, temperature sensors, and refrigerant coils.
  • a schematic of an exemplary VAVRF indoor unit is as shown in FIG.5. Both the damper actuation and the refrigerant flow using the electronic expansion valve (EEV) are controlled by the VAVRF controller.
  • a complete schematic of an exemplary VAVRF System is as shown in FIG.6.
  • the VAVRF indoor unit includes a flow sensor device to determine the speed of air passing through it, such as, but not limited to, a pitot tube.
  • An exemplary indoor unit also include a motor to control the damper in addition to a temperature sensor to detect the air dry bulb and wet bulb conditions (in this way, the VAVRF controller knows how much to cool the air before sending cooled air into the room).
  • the indoor unit also includes a refrigerant coil section which contains an electronic expansion valve (EEV) to precisely control the amount of refrigerant required to maintain the pressure differential between the refrigerant suction and discharge, and a temperature sensor to detect the temperature of the refrigerant before and after exiting the refrigerant coil.
  • EEV electronic expansion valve
  • An exemplary indoor unit also has a mounted control panel to control the operation of all the various sensors and motors and to relay this information to the VAVRF controller (e.g., “Heat Recover Branch Selector Box” in FIG.6) and outdoor unit (“VAVRF Outdoor Unit” in FIG.6).
  • VAVRF controller e.g., “Heat Recover Branch Selector Box” in FIG.6
  • VAVRF Outdoor Unit outdoor unit
  • Both the refrigerant control and damper control for airflow can be modulated simultaneously to provide optimal energy savings and indoor environmental quality (maintaining space temperature and humidity levels).
  • Refrigerant controls on the indoor unit uses the electronic expansion valve to control refrigerant flow based on enter/leaving refrigerant temperature at the refrigerant coil; to maintain superheat control for cooling/subcooling control for heating; and adjust target temperature based on the error between thermostat set-point and room temperature changes.
  • the damper position on the indoor unit can be setup for fan cycling or continuous operation, user-set controls, or “Single Zone VAV” type fan control.
  • an exemplary indoor unit has at least 3 thermistor sensors. Once the thermostat in the space reports that the actual temperature deviates from the setpoint thermostat temperature by a margin, the VAVRF controller immediately opens the damper to or from a minimum airflow damper position to a maximum zone airflow damper position based on readings from airflow sensors.
  • a thermistor can calculate the existing supply air temperature from the VAVRF AHU, and the VAVRF controller can determine the amount of cooling required and can control the EEV to allow the required refrigerant to either cool or heat the space back to the setpoint of the thermostat.
  • a VAVRF damper can be configured to close the damper back to a minimum airflow damper position to allow the minimum airflow and/or minimum ventilation.
  • an exemplary refrigerant coil operation works similar to a traditional VRF system. [0037]
  • the VAVRF air handling unit AHU
  • the unit supplies air to ducts that serve multiple zones.
  • Each zone has a pressure independent indoor VAVRF unit that can keep a predetermined volume of air flowing through it (via dampers). As the VAVRF controller varies the airflow into the space using the damper, the air pressure in the main duct changes.
  • a duct pressure sensor that has been set for particular pressure inside the duct controls the main AHU fan to adjust total system airflow.
  • the air handling unit includes a combination of return, supply, mixing, relief, and ventilation regions. Either a relief fan or a relief damper controls the building pressurization such that the building is either positively or negatively pressurized as required by use case.
  • a cooling and reheat coil can be placed either in the supply or the outside air/ventilation region of the AHU for dehumidification.
  • This cooling and reheat coil can use a designated heat recovery/branch selector box (controller).
  • the air can also be tempered (cooled or heated to setpoint) before it reaches the VAVRF indoor unit for final heating and cooling, which will help reduce the size of the VAVRF indoor unit.
  • the VAVRF AHU outdoor section can also be equipped with any number of high-performance technologies such as: (1) Economizers; (2) UV Filter; (3) Bipolar ionization; (4) HEPA or other ULPA Filters; (5) Humidifiers; (6) Preheat Coils; (7) Indirect Gas Heating; (8) Enthalpy Wheels; (9) Air-Air Heat Recovery, etc.
  • the supply fan of the air handling unit is controlled by a duct pressure sensor (e.g., located 2/3 of the way on the longest run) of the supply duct.
  • a duct pressure sensor e.g., located 2/3 of the way on the longest run
  • ducts from the VAVRF packaged unit or VAVRF AHU to the VAVRF indoor unit are designed for pressures of medium to high pressure duct design, which enables better controls for the VAVRF indoor unit damper controls.
  • an exemplary condensing unit of the VAVRF system is typically located outside of a building and is similar in operation to current VRF systems.
  • the condenser can be a standalone equipment or be packaged similar to a VAV rooftop unit.
  • the controls for the condensing unit shares similarities with operation of a typical VRF outdoor unit.
  • the condensing unit is configured to operate under a plurality of modes, including: (a) Cool Operation - Detects the system operating suction pressure at the condenser periodically & target evaporation temperature; (b) Heat Operation - Detects the system operating high pressure at the condenser periodically & target condensation temperature; and (c) Adjusts compressor speed (capacity) up or down to correct deviation from the target pressure values (system load).
  • the VAVRF controller e.g., branch selector in a VAVRF system works similar to how one in a typical 2 Pipe or 3 Pipe VRF branch controller/selector works.
  • the VAVRF controller is either a single port or a multiport box, where changeover controls and/or controlling the amount of refrigeration to each zone occurs. Mode changeover in the branch controller is typically accomplished using: (a) outside ambient air or a set calendar; (b) averaging temperatures from all units on the system; (c) weighted vote from all units based on demand and priority; and/or (d) a critical zone unit.
  • an exemplary VAVRF system is able to provide the advantages of both variable air volume (VAV) and variable refrigerant flow (VRF) systems simultaneously by having a central ventilation only air handling unit that is responsible for all the air volume movement, such as outdoor air (OA) mixing, relief air, supply air, providing the required static pressure drop, energy recovery using enthalpy wheel and tempering air stream using supplementary heat in a cold climate.
  • This supply air is carried to an individual indoor unit that utilizes a damper to adjust airflow into each space/zone.
  • an exemplary VAVRF system can have the compressor unit and the air handling unit be packaged as separate (split) units or be packaged as a single unit.
  • FIG.7 shows an embodiment of a packaged VAVRF system as a single unit.
  • VAVRF will be more efficient that a traditional VAV system; (2) Having a packaged unit VAVRF system that fits existing roof curb and duct work may be cheaper and more desired; (3) VAVRF has the advantage of lower energy use and lower cost due to the system not needing multiple fans in all indoor units; (4) Since the indoor units in a VAVRF system do not have ECM (electronically commutated motor) fans, they do not need to be powered with single or three phase line voltage; (5) Savings in electric wiring costs (e.g., control of damper and indoor unit containing refrigerant can be done using low voltage (12V-48V); (6) Breakers are not required for every VAVRF indoor unit as required by the National Electric Code; (7) VAVRF indoor units have less breakdowns due to fewer moving parts; (8) Air filtration can be done much cheaper and efficiently by installing different types of MERV (minimum efficiency reporting value) filter, bipolar ionization, UV treatment etc.
  • MERV minimum efficiency reporting value
  • VAVRF systems In VAVRF systems, the filters are located in a single location in the packaged VAVRF or in the VAVRF AHU such that having all the filters in one place rather than spread across individual indoor units saves the facilities budget on having to clean each and every indoor unit filter; (10) Having all the moving parts outside a building helps the maintenance and repair work to be carried out occupied spaces (which helps prevent disruption during routine maintenance); (11) VAVRF system with a separate humidity control circuit and duct steam humidifiers can very accurately control the humidity of the space; (12) Having a single fan in the packaged outdoor VAVRF unit or outdoor VAVRF AHU, coupled with baffles and sound attenuating devices in the ductwork makes the VAVRF system well suited for applications (such as recording studios) where extremely low noise is required; (13) VAVRF systems can utilize economizing and take advantage of free cooling (when the outside temperature and enthalpy is low enough to introduce 100% outside air directly into
  • Supplemental heating is provided in the packaged and/or split VAVRF system as required, and unlike VRF indoor units, supplemental heating can be of any type (gas, hot water, steam, electric coil, etc.)
  • supplemental heating can be of any type (gas, hot water, steam, electric coil, etc.)
  • the present disclosure presents embodiments of a novel and unique VAVRF system having a new and improved VAVRF controller, the indoor VAVRF unit, and VAVRF AHU system, that is equipped to perform simultaneous heating and cooling operations in different zones/rooms being serviced by the VAVRF system.
  • the VAVRF controller unit, or other components described herein, can each include at least one processing circuit.
  • the processing circuit can include one or more processors and one or more storage devices that are coupled to a local interface.
  • the local interface can include a data bus with an accompanying address/control bus or any other suitable bus structure.
  • the one or more storage devices for a processing circuit can store data or components that are executable by the one or processors of the processing circuit. Also, a data store can be stored in the one or more storage devices.
  • all parts of the VAVRF system can be interlinked with popular controls protocols for buildings such as BACnet, Lonswork, etc., and the VAVRF system shall be able to operate under standalone controls and or be linked to existing BAS (Building Automation Systems).
  • BAS Building Automation Systems
  • the hardware technology can include one or more microprocessors, discrete logic circuits having logic gates for implementing various logic functions upon an application of one or more data signals, application specific integrated circuits (ASICs) having appropriate logic gates, programmable logic devices (e.g., field- programmable gate array (FPGAs), and complex programmable logic devices (CPLDs)).
  • ASICs application specific integrated circuits
  • FPGAs field- programmable gate array
  • CPLDs complex programmable logic devices
  • one or more or more of the components described herein that includes software or program instructions can be embodied in any non-transitory computer-readable medium for use by or in connection with an instruction execution system such as a processor in a computer system or other system.
  • the computer- readable medium can contain, store, or maintain the software or program instructions for use by or in connection with the instruction execution system.
  • the computer-readable medium can include physical media, such as, magnetic, optical, semiconductor, or other suitable media. Examples of a suitable computer-readable media include, but are not limited to, solid-state drives, magnetic drives, flash memory. Further, any logic or component described herein can be implemented and structured in a variety of ways. One or more components described can be implemented as modules or components of a single application. Further, one or more components described herein can be executed in one computing device or by using multiple computing devices. [0050] It should be emphasized that the above-described embodiments are merely possible examples of implementations, merely set forth for a clear understanding of the principles of the present disclosure. Many variations and modifications may be made to the above-described embodiment(s) without departing substantially from the principles of the present disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

La présente divulgation concerne divers modes de réalisation d'un nouveau système HVAC et d'appareils (et de procédés associés) qui combinent les efficacités des systèmes VRF et VAV. Un système donné à titre d'exemple comprend une pluralité d'unités intérieures situées dans différentes zones d'un bâtiment, chacune comprenant un amortisseur servant à moduler l'écoulement d'air à travers l'unité intérieure dans un espace de construction et une vanne servant à moduler un écoulement de fluide frigorigène à travers l'unité intérieure ; une unité de traitement d'air ayant un ventilateur d'alimentation qui est conçu pour générer le flux d'air reçu par la pluralité d'unités intérieures ; et une unité de commande utilisable pour commander l'amortisseur et la vanne simultanément pour chacune de la pluralité d'unités intérieures, l'unité de commande étant utilisable pour commander le ventilateur d'alimentation et une quantité d'écoulement d'air générée par le ventilateur d'alimentation.
PCT/US2023/072355 2022-08-18 2023-08-17 Flux de fluide frigorigène variable à air variable (vavrf) WO2024040144A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060234621A1 (en) * 2005-03-10 2006-10-19 Desrochers Eric M Multipoint air sampling system having common sensors to provide blended air quality parameter information for monitoring and building control
US20070180851A1 (en) * 2004-03-31 2007-08-09 Daikin Industries, Ltd. Air conditioning system
US20100269520A1 (en) * 2009-04-28 2010-10-28 Steven Clay Moore Air-conditioning with dehumidification
US20110271695A1 (en) * 2010-05-06 2011-11-10 Hitachi Plant Technologies, Ltd. Cooling method and cooling system for electronic device
US20180187915A1 (en) * 2016-01-15 2018-07-05 Addison Hvac Llc Hvac system comprising independently variable refrigerant flow (vrf) and variable air flow (vaf)
US20190383536A1 (en) * 2018-06-15 2019-12-19 Johnson Controls Technology Company Adjustable duct for hvac system
EP3792565A1 (fr) * 2019-09-12 2021-03-17 Daikin Industries, Ltd. Système de climatisation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070180851A1 (en) * 2004-03-31 2007-08-09 Daikin Industries, Ltd. Air conditioning system
US20060234621A1 (en) * 2005-03-10 2006-10-19 Desrochers Eric M Multipoint air sampling system having common sensors to provide blended air quality parameter information for monitoring and building control
US20100269520A1 (en) * 2009-04-28 2010-10-28 Steven Clay Moore Air-conditioning with dehumidification
US20110271695A1 (en) * 2010-05-06 2011-11-10 Hitachi Plant Technologies, Ltd. Cooling method and cooling system for electronic device
US20180187915A1 (en) * 2016-01-15 2018-07-05 Addison Hvac Llc Hvac system comprising independently variable refrigerant flow (vrf) and variable air flow (vaf)
US20190383536A1 (en) * 2018-06-15 2019-12-19 Johnson Controls Technology Company Adjustable duct for hvac system
EP3792565A1 (fr) * 2019-09-12 2021-03-17 Daikin Industries, Ltd. Système de climatisation

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