WO2014190383A1 - Pompe à chaleur monobloc dotée d'un déversoir de fumée intégré - Google Patents

Pompe à chaleur monobloc dotée d'un déversoir de fumée intégré Download PDF

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Publication number
WO2014190383A1
WO2014190383A1 PCT/AU2014/000560 AU2014000560W WO2014190383A1 WO 2014190383 A1 WO2014190383 A1 WO 2014190383A1 AU 2014000560 W AU2014000560 W AU 2014000560W WO 2014190383 A1 WO2014190383 A1 WO 2014190383A1
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Prior art keywords
space
air
accordance
air stream
arrangement
Prior art date
Application number
PCT/AU2014/000560
Other languages
English (en)
Inventor
Kevin Harris
Original Assignee
Fusion Hvac Pty Ltd
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
Priority claimed from AU2013901898A external-priority patent/AU2013901898A0/en
Application filed by Fusion Hvac Pty Ltd filed Critical Fusion Hvac Pty Ltd
Priority to AU2014273837A priority Critical patent/AU2014273837A1/en
Priority to US14/894,706 priority patent/US20160102873A1/en
Publication of WO2014190383A1 publication Critical patent/WO2014190383A1/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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • 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
    • F24F3/001—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 in which the air treatment in the central station takes place by means of a heat-pump or by means of a reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems

Definitions

  • Buildings can have air conditioning or ventilation systems in which the air is heated or cooled by externally located air delivery units.
  • the primary cooling and heating equipment of such air delivery units can largely be contained within a single weather-proof unit or piece of apparatus, known as a packaged air conditioner (PAC) , which is externally located.
  • PAC packaged air conditioner
  • This primary cooling and heating equipment can include indoor refrigeration cycle components such as compressors, reversing valves (for heating), evaporators and condensers, and associated fans.
  • PACs cool or heat return air from a building and outdoor air, or can cool or heat a blend of the two, for example, made up predominantly of return air (unless delivering economiser mode "free cooling" of predominantly cool outdoor air) before delivering this conditioned air to the building.
  • Buildings are being constructed with increasing air tightness as the demand for sustainable buildings rises. Consequently, spill air, increasingly, needs to be provided with a spill air path - usually fan assisted - in order to be relieved from modern buildings, rather than simply escaping as leakage.
  • Disadvantages with PACs of the prior art include !iheir inability to remove spill air from a building while supplying air to a building.
  • Ventilation systems in buildings can include smoke control systems operable to remove smoke from a building.
  • Smoke control systems include a combination of fans, dampers, warning devices and control equipment.
  • Buildings that can have smoke control systems include hospitals, enclosed shopping malls, warehouses, factories and high rise buildings.
  • Smoke control systems are installed in buildings to protect the lives of occupants and reduce damage to property.
  • National building codes eg the Building Code of Australia
  • Smoke control systems may be classed as dedicated or non-dedicated systems.
  • Non-dedicated smoke control systems are used during normal HVAC (heating, ventilation and air-conditioning) operation and during a smoke event.
  • HVAC heating, ventilation and air-conditioning
  • smoke control mode When smoke control mode is activated in a non-dedicated smoke control system, the operation of the building's HVAC equipment changes.
  • These systems involve a specialised control strategy and may also require additional control and monitoring points.
  • Dedicated smoke control systems can include mechanically powered smoke exhaust fans that are automatically switched on in a smoke event to maintain a negative pressure in a smoke filled space.
  • the intention of a mechanically powered smoke exhaust fan is to maintain a negative pressure relative to the surrounding space so that the smoke does not migrate to undesirable areas.
  • AHU air handling unit
  • PAC air handling unit
  • This also prevents smoke from being re-circulated back into the building.
  • smoke exhaust fans may be used to draw smoke from the smoke reservoir to prevent the smoke level from dropping down to the height of occupants, and for a sufficient period of time to allow the occupants to escape.
  • an apparatus for conditioning air in a space may include a first arrangement for receiving an aix" stream from the space, and discharging an air stream to the space.
  • the apparatus may also include a second arrangement for receiving an air stream from outside the space and discharging an air stream to outside the space, the second arrangement being configured to receive a first portion of the air stream received from the space via the first arrangement .
  • the first portion of air received from the space is combined in the second arrangement with the air stream received from outside the space. In some forms, the combined air stream is discharged outside the space.
  • the second arrangement is able to be isolated to the receipt of air from the first arrangement .
  • the first arrangement receives another air stream from outside the space.
  • the other air stream is combined with a second portion of the air stream received from the space, with this combined stream being discharged to the space.
  • the first arrangement comprises a first heat exchanger.
  • the second arrangement comprises a second heat exchanger.
  • the first and second heat exchangers are fluidly connected.
  • a first mode of operation when the temperature of the first portion of the air stream is greater than the temperature of the air stream received from outside the space; and when the streams are combined in the second arrangement, the first portion heats the stream received from outside.
  • a second mode of operation when the temperature of the first portion of the air stream is less than the temperature of the air stream received from outside the space; and when the streams are combined in the second arrangement, the first portion cools the stream received from outside.
  • the second heat exchanger extracts heat from the first portion of the air stream and the first heat exchanger emits the extracted heat.
  • the second heat exchanger extracts coolth from the first portion of the air stream and the first neat exchanger emits the extracted coolth.
  • the heat emitted heats the combined stream discharged to the space.
  • the coolth emitted cools the combined stream discharged to the space .
  • the air stream received from the space includes spill air and return air.
  • the second arrangement further comprises an assembly to hold a fluid.
  • the first arrangement further comprises at least one fan configured to discharge the second combined air stream to the space.
  • the second arrangement further comprises at least one fan that is able to discharge the first combined air stream to outside the space.
  • the first or second arrangement further comprises at least one other fan which is able to cause the second arrangement to receive the first portion of the air stream received from the space.
  • the second arrangement further comprises a discharging assembly arranged to discharge the fluid.
  • the discharging assembly and the fluid holding assembly are fluidly connected.
  • the fluid discharged by the discharging assembly mixes with the air stream received from outside the space in the second arrangement.
  • the said mixing of the fluid and the outside air stream evaporatively cools the air stream in the second arrangement.
  • the fluid is a liquid such as water.
  • the discharge assembly is arranged to discharge the liquid as a spray or mist. In some forms, at least a portion of the liquid comprises condensate from the first heat exchanger.
  • the apparatus is a package unit.
  • isolation of the second arrangement to the receipt of air from the first arrangement is caused by closing a spill air damper.
  • the spill air damper is fire rated.
  • the package unit is able to extract smoke from the space, and discharge the smoke outside the space, as part of a smoke extraction system.
  • an apparatus forming part of a package unit for conditioning a space.
  • the apparatus may comprise an arrangement for receiving and discharging an air stream from outside the space.
  • the apparatus may also comprise a holder for a fluid.
  • the apparatus may also comprise a discharging assembly arranged to receive fluid from the holder and to discharge the fluid.
  • the discharging assembly is arranged such that the fluid discharged thereby mixes with the air stream received from outside the space in the arrangement.
  • the said mixing of the fluid and the outside air stream evaporatively cools the air stream in the arrangement .
  • the fluid is a liquid such as water.
  • at least a portion of the water comprises condensate from a heat exchanger.
  • the apparatus forming part of a package unit for conditioning a space is the second arrangement .
  • Fig. i shows the front and side section views of typical Package Air Conditioning Unit ⁇ PAC) of the prior art
  • Fig. 2 shows the front, side and section views of a PAC comprising a holding tank
  • Fig. 3 shows the front, side and section views of a PAC comprising a holding tank and a spill air damper
  • Fig. 4 shows front, side and section views of a PAC comprising heat reclaim dampers
  • Fig. 5 shows another front, side and section views of a PAC comprising heat reclaim dampers
  • Fig. 6 shows another front, side and section views of a PAC
  • Displacement ventilation systems are becoming increasingly popular as a sustainable means of cooling or heating buildings.
  • conditioned air is supplied, with largely minimal mixing, to a space within a building at or near floor level to create a low level occupancy microclimate of enhanced indoor air quality of, typically, 23 °C or similar .
  • Heat and contaminants from occupants, computers, lights, etc. are removed from the space at a high level, where they accumulate in concentrated form after rising by natural convection to stratify in layers of air that often exceed 30°C.
  • the air temperature that is removed from the space is, thus, usually substantially higher than a traditional "mixed flow" distribution system's return air temperature, especially in applications where there is sufficient height for well-developed stratification to occur, such as in cinemas.
  • PACs of the prior art generally supply air, even in cooling mode, at a temperature that is too low for use in displacement systems, especially if this is to be done without wastefully reheating the supply air, or with limited reheat.
  • sections i-a, i-b, ii-a and ii-b show a PAC of the prior art (31 ⁇ with at least one supply fan (1) that draws an air stream from the space
  • Condensate from the first heat exchanger ⁇ 4 ⁇ collects in a condensate tray (18) to be drained to the outdoors via condensate pipe (IS).
  • Components (1, 2, 3, 4, 15, 16, and 18) are largely housed in a largely thermally insulated casing (20) .
  • At least one compressor (21), controlled by controller (22) in control panel (23), is connected via refrigeration piping and associated refrigeration components (not: shown) to the first heat exchanger (4) and to the second heat exchanger (27).
  • At least one fan (24) is located in a second arrangement (2b), in the form of another chamber, draws air stream (26) from the outdoors (11) through the second heat exchanger (27) to be discharged to the outdoors via at least one air outlet (25).
  • the PAC of the prior art (31) typically stands on a platform (30) supported by platform legs (33) connected to roof beams (32) via seals (not shown) in roof sheeting (28) .
  • sections i-a, i-b, ii-a and ii-b show a PAC in accordance with the present disclosure (31a) with at least one supply fan (1) that draws supply air stream (7) from the suction chamber (2) through filter (3) and the first heat: exchanger (4) to be discharged through supply air outlet (5) into supply duct (6) .
  • Return air (13) is drawn from return duct (9) via return air inlet (S) and through return air chamber (2a) into the suction chamber (2).
  • Outdoor air (14) is drawn from the outdoors (II) into the suction chamber (2) through outdoor air inlet (10), which may include a weather louvre (not shown) .
  • the flow rates of the return air (13) and the outdoor air (14) are regulated by return air damper (15) and outdoor air damper (16), respectively, which may be adjusted by electric actuators (not shown).
  • Gaskets (17a) join the supply air (6) and return air (9) ducts, which may be contained in common housing (6a) to the flat underside (17b) of the PAC directly surrounding the supply air outlet (5) and return air inlet (8).
  • Condensate from the first heat exchanger (4) collects in a condensate tray (18) and may be drained into holding tank (34) via condensate pipe (19) .
  • Components (1, 2, 3, 4, 15, 16, and 18) are largely housed in a largely thermally insulated casing (20) .
  • At least one compressor (21), controlled by controller (22) in control panel (23), is connected via refrigeration piping and associated refrigeration components (not shown) to the first heat exchanger (4) and to the second heat exchanger (27).
  • At least one fan (24) draws air stream (26) from the outdoors (11), via outdoor air damper (41) through the second heat exchanger (27) to be discharged to the outdoors via at least one air outlet (25) .
  • Condensate from the second heat exchanger (27) drains into holding tank (34), as does rain water that largely falls onto the PAC (31a) .
  • holding tank water (38) may be pumped by condensate pump (37), and filtered and sterilised by water treatment module (39), before being discharged by evaporative fogger (40), which sprays a water mist that evaporat ively cools air stream (26) directly upstream of second heat exchanger (27) .
  • Mains water may be piped (not shown) to holding tank (34) to maintain a minimum holding tank water level (38) via a suitable flow valve and associated mechanism (not shown) .
  • Overflow water from holding tank (34) drains via a suitable overflow pipe (not shown) to a suitable drainage point or onto roof sheeting (28), which is supported by purlins (29) attached to roof beams (32).
  • Upstand (33a) may be structurally supported by roof beams (32) to carry a substantial portion of the weight of PAC (31a), such as the weight of thermally insulated casing (20) and the components that it houses.
  • Support flange (35) rests on upstand (33a), which may also serve as overflashing (36), and on a gasket (not shown) to create a watertight seal onto upstand (33a).
  • PAC (31a) The largely flat underside (17b) surrounding supply tlet (5) and return air inlet (8) of PAC (31a) rests on support flange (35), which largely carries the weight of thermally insulated casing (20) and its components via gasket (17a) , which in turn forms an airtight seal between PAC (31a), supply duct (6) and return duct (9), Supply duct (6) and return duct (9) are suspended from support flange (35) via common housing (6a) .
  • PAC (31a) is additionally supported by support legs (33b) connected to roof beams (32) via seals (not shown) in roof sheeting (28) .
  • sections i-a, i-b, ii-a and ii-b show a PAC in accordance with the present disclosure (31a) with at least one supply fan (1) that draws supply air stream (7) from the suction chamber (2) through filter ⁇ 3) and the first heat exchanger (4) to be discharged through supply air outlet (5) into supply duct (6) .
  • Return air (13) is drawn from return air chamber (2a) into the suction chamber (2) .
  • Another air stream (14), in the form of outdoor air, is drawn from the outdoors (11) into the suction chamber (2) through outdoor air inlet (10), which may include a cowl or weather louvre (not shown) .
  • the flow rates of the return air (13) and the outdoor air (14) are regulated by return air damper (15) and outdoor air damper (16), respectively, which may be adjusted by electric actuators (not shown) ,
  • Return air and spill air combined (26b) are drawn from return duct (9) via return air inlet (8) into return air chamber (2a).
  • Gaskets (17a) join the supply air (6) and return air (9) ducts, which may be contained in common housing (6a) to the flat underside (17b) of the PAC directly surrounding the supply air outlet (5) and return air inlet (8).
  • Condensate from the first heat exchanger (4) collects in a condensate tray (18) and may be drained into holding tank (34) via condensate pipe (19) .
  • Components (1, 2, 3, 4, 15, 16, and 18) are largely housed in a largely thermally insulated casing (20) .
  • At least one compressor (21), controlled by controller (22) in control panel (23), is connected via refrigeration piping and associated refrigeration components (not shown) to the first hear, exchanger (4) and to the second heat exchanger (27) .
  • At least one fan (24) draws a first portion of the return air stream (26a), in the form of spill air, from return air chamber (2a) through a spill air damper (42), which may be adjusted by at least one electric actuator (not shown ⁇ , into suction chamber (2b). Fan (24) also draws air stream (26) from the outdoors (11), via outdoor air damper (41) through the second heat exchanger (27) to be discharged to the outdoors.
  • Condensate from the second heat exchanger (27) drains into holding tank (34), as does rain water that largely fails onto the PAC (31a).
  • a fluid (38) in the form of a holding tank, water
  • (38) may be pumped by condensate pump (37), and filtered, demineralised and sterilised by water treatment module
  • evaporative fogger in the form of an evaporative fogger, which sprays a liquid mist that mixes and. evaporatively cools air stream (26) directly upstream of second heat exchanger (27).
  • Mains water may be piped (not shown) to holding tank (34) to maintain a minimum holding tank water level (38) via a suitable flow valve and associated mechanism (not shown) .
  • Overflow water from holding tank (34) drains via a suitable overflow pipe (not shown) onto roof sheeting (28), which is supported by purlins (29) attached to roof beams ( 32 ) .
  • Upstand (33a) may be structurally supported by roof beams (32) to carry a substantial portion of the weight of PAC (31a) , such as the weight of thermally insulated casing (20) and the components that it houses.
  • Support flange (35) rests on upstand (33a), which may also serve as overflashing (36), and. on a gasket (not shown) to create a watertight seal onto upstand (33a).
  • PAC (31a) rests or. support flange (35), which largely carries the weight of thermally insulated casing (20) and its components via gasket (17a) , which in turn forms an airtight seal between PAC (31a), supply duct (6) and return duct (9) .
  • Supply duct (6) and return duct (9) are suspended from support flange (35) via common housing (6a).
  • PAC (31a) is additionally supported by support legs (33b) connected to roof beams (32) via seals (not shown) in roof sheeting (28) .
  • sections i-a, i-b, ii-a and ii-b show a PAC in accordance with the invention (31a) with at least one supply fan (1) that draws supply air stream (7) from the suction chamber (2) through filter (3) and the first heat exchanger (4) to be discharged through supply air outlet (5) into supply duct (6).
  • Return air (13) is drawn from return air chamber (2a) into the suction chamber (2) .
  • Outdoor air (14) is drawn from the outdoors (11) into the suction chamber (2) through outdoor air inlet (10), which may include a cowl or weather louvre (not shown).
  • the flow rates of the return air (13) and the outdoor air (14) are regulated by return air damper (15) and outdoor air damper (16), respectively, which may be adjusted by electric actuators (not shown) .
  • Return air and spill air combined (26b) are drawn from return duct (9) via return air inlet (8) into return air chamber (2a) .
  • Gaskets (17a) join the supply air (6) and return air (9) ducts, which may foe contained in common housing (6a) to the flat underside (17fo) of the PAC directly surrounding the supply air outlet (5) and return air inlet (8).
  • Condensate from the first heat exchanger (4) collects in a condensate tray (18) and may be drained into holding tank (34) via condensate pipe (19).
  • Components (1, 2, 3, 4, 15, 16, and 18) are largely housed in a largely thermally insulated casing (20).
  • At least one compressor (21), controlled by controller (22) in control panel (23), is connected via refrigeration piping and associated refrigeration components (not shown) to the first heat exchanger (4) and to the second heat exchanger (27).
  • At least one fan (24) draws spill air with heat reclaim potential (26c) from return air chamber (2a) through heat reclaim spill air damper (43), which may be adjusted by at least one electric actuator (not shown) , and then through the second heat exchanger (27) .
  • Fan (24) also draws air stream (26) from the outdoors (11), via outdoor air damper (41) through the second heat exchanger (27) to be discharged to the outdoors via at least one air outlet (25) .
  • the spill air stream (26c) and the air stream (26) are combined in the suction chamber (2b).
  • the combined air stream (26c and 26) is discharged to the outdoors via at least one air outlet (25).
  • Spill air damper (42) and heat reclaim dampers (43) can isolate suction chamber (2b) from suction chamber (2), thereby preventing the flow of spill air stream (26c) into suction chamber (2b).
  • the second portion of the air stream received from the space, in the form of return air (13), is combined with outdoor air stream (14) in suction chamber (2) to form the supply air stream ( 7) .
  • a first mode of operation when the temperature of air stream (26c) is greater than the temperature of the air stream received from outside the space (26), and when the streams are combined in suction chamber (2b) , air stream (26c) heats air stream (26).
  • the second heat exchanger (27) extracts heat from air stream (26c) and the first heat exchanger (4) emits, or rejects, the extracted heat to increase the temperature of supply air stream (7) .
  • a second mode of operation when the temperature of air stream (26c) is less than the temperature of the air stream received from outside the space ⁇ 26), and when the streams are combined in suction chamber (2b), air stream (26c) cools air stream (26).
  • the second heat exchanger (27) extracts coolth, whereby coolth is the opposite of heat, from air stream (26c) and the first heat exchanger (4 ⁇ emits, or rejects, the extracted coolth to decrease the temperature of supply air stream ( 7 ) .
  • Condensate from the second heat exchanger (27) drains into holding tank (34), as does rain water that largely falls onto the PAC (31a) .
  • holding tank water (38) may be pumped by condensate pump (37), and filtered, demineralised. and sterilised by water treatment module (39), before being discharged by evaporative fogger (40), which sprays a water mist that evaporatively cools air stream (26) directly upstream of second heat exchanger (27) .
  • Mains water may be piped ⁇ net shown) to holding tank ⁇ 34) to maintain a minimum holding tank water level (38) via a suitable flow valve and associated mechanism (not shown).
  • Overflow water from holding tank (34) drains via a suitable overflow pipe (not shown) onto roof sheeting (23), which is supported by purlins (29) attached to roof beams (32) .
  • sections i-a, i-b, ii-a and ii-b show a PAC in accordance with the invention (31a) with at least one fire rated outdoor air damper (41) and at least one fire rated return air damper (15) and at least one fire rated spill air damper (42) or fire rated heat reclaim spill air damper (43), which also serves as a smoke spill air damper (42 and/or 43) .
  • Smoke spill air (26d) is drawn from return duct (9), which is fire rated, via return air inlet (8) into return air chamber (2a), which is also fire rated.
  • Gaskets (17a) join the supply air (6) and return air (9) ducts, which may be contained in common housing (6a) to the flat underside (17b) of the PAC directly surrounding the supply air outlet (5) and return air inlet (8) .
  • At least one fan (24) which is fire rated, draws smoke spill air (26d) through at least one smoke spill air damper (42 and/or 43) from return air chamber (2a) to be discharged to the outdoors via at least one air outlet (25) .
  • Each fire rated damper may be adjusted by at least one electric actuator suitable for smoke spill damper operation (not shown).
  • spill air fan (44) draws spill air (26a) from return air chamber (2a ⁇ and discharges this air through at least one spill air damper (42), Thereafter, this air vents passively to the outdoors (11) via the second heat exchanger (27) and fan (24), or it is drawn by at least one fan (24) via type 2 outlet (25) to be discharged to the outdoors (11).
  • spill air fan (44) draws spill air with heat reclaim potential (26c) from return air chamber (2a) and discharges this air through at least one heat reclaim spill air damper (43) . Thereafter, this air vents passively to the outdoors (11), both directly as well as indirectly via the second heat exchanger (27) and fan (24), or it is drawn by at least one fan (24) across at least one the second heat exchanger (27) to be discharged via type 2 outlet (25) to be discharged to the outdoors (11) ⁇
  • spill air fan (44) is fire rated and draws smoke spill air from return air chamber (2a) and discharges this air through at least one fire rated spill air damper (42) or one fire rated heat reclaim spill air damper (43). Thereafter, this air vents passively to the outdoors (11), both directly as well as indirectly via the second heat exchanger (27) and fan (24).
  • the evaporative mister onto type 2 heat exchanger may be connected directly to the main water supply of the building rather than to a pump system that draws a combination of mains water, collected rain water and collected condensate water from heat exchangers type 1 and 2.
  • the present embodiments are, therefore, to be considered in all respects as illustrative and not restrict ive .
  • HVAC systems that condition supply air via PACs in accordance with the embodiments of the invention incorporate a fan assisted spill air function and therefore do not require separate spill air fan systems.
  • HVAC systems that condition supply air via PACs in accordance with the embodiments of the invention benefit from reduced power consumption in applications requiring outdoor air to be delivered to the space being conditioned, as such PACs include the facility to reclaim heat from the spill air venting from the conditioned space .
  • HVAC systems that condition supply air via PACs in accordance with the embodiments of the invention benefit from being able to operate in an extended outdoor air temperature range (both colder and warmer than that of PACs of the prior art), especially when introducing large quantities of outdoor air to the space, as heat reclaim from the spill air raises the air temperature onto the outdoor heat exchanger in winter and reduces it in summer, and also reduces defrost requirements in winter.
  • HVAC systems that condition supply air via PACs in accordance with the embodiments described in this invention may operate in an even further extended summer outdoor temperature range, as the integration of water spray, mist or flash fogging onto the outdoor hear exchanger reduces the temperature of the outdoor exchanger ,
  • HVAC systems that condition supply air via PACs in accordance with the embodiments of the invention may be designed to operate efficiently and effectively with displacement ventilation systems in winter, given that spill air heat recovery in winter minimises defrost frequency and duration, and hence associated supply air temperature fluctuations - indeed, outdoor coil defrosting is very often eliminated entirely,
  • KVAC systems that incorporate PACs in accordance with the embodiments described in this invention may benefit from the elimination of additional smoke system rated fan and ducting requirements for the removal of smoke in the event of a fire, as such PACs include a fan assisted smoke spill function.
  • PACs include a fan assisted smoke spill function.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Ventilation (AREA)

Abstract

L'invention concerne un appareil, sous la forme d'une unité de climatisation monobloc (PAC) destinée à la climatisation d'un espace. L'espace peut comprendre le ou les espaces intérieurs de bâtiments tels que des hôpitaux, des centres commerciaux fermés, des entrepôts, des usines et autres. La PAC comprend un premier agencement, sous la forme d'une chambre d'aspiration pour la réception d'un flux d'air provenant de l'espace (par ex. de l'air de retour) et l'évacuation d'un flux d'air dans l'espace (par ex. de l'air d'alimentation). La PAC dispose d'un second agencement, sous la forme d'une seconde chambre pour la réception d'un flux d'air provenant de l'extérieur de l'espace (par ex. de l'air frais) et l'évacuation d'un flux d'air vers l'extérieur de l'espace (par ex. de l'air d'échappement). La seconde chambre est conçue pour recevoir une partie de l'air de retour par le biais de la chambre d'aspiration.
PCT/AU2014/000560 2013-05-28 2014-05-28 Pompe à chaleur monobloc dotée d'un déversoir de fumée intégré WO2014190383A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2014273837A AU2014273837A1 (en) 2013-05-28 2014-05-28 Packaged heatpump with integrated smokespill
US14/894,706 US20160102873A1 (en) 2013-05-28 2014-05-28 Packaged HeatPump with Integrated Smokespill

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AU2013901898A AU2013901898A0 (en) 2013-05-28 A rooftop air conditioning assembly and a method of constructing same
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