US20040188082A1 - Air-conditioning system for rooms - Google Patents

Air-conditioning system for rooms Download PDF

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Publication number
US20040188082A1
US20040188082A1 US10/697,296 US69729603A US2004188082A1 US 20040188082 A1 US20040188082 A1 US 20040188082A1 US 69729603 A US69729603 A US 69729603A US 2004188082 A1 US2004188082 A1 US 2004188082A1
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US
United States
Prior art keywords
tube
fan
convectors
air
cooling
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/697,296
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English (en)
Inventor
Valerio Riello
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AERMEE SpA
Aermec SpA
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to AERMEC reassignment AERMEC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RIELLO, VALERIO GIORDANO
Publication of US20040188082A1 publication Critical patent/US20040188082A1/en
Assigned to AERMEE S.P.A. reassignment AERMEE S.P.A. CORRECTIVE ASSIGMENT TO CORRECT ASSIGNEE NAME R15202 F0686 Assignors: RIELLO, VALERIO GIORDANO
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • 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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems

Definitions

  • the present invention refers to an air-conditioning system for rooms according to the pre-characterizing portion of claim 1 .
  • the house should be heated during winter in all the rooms it is made up of, whereas it should be cooled during summer only in some rooms, i.e. those which are used more frequently, leaving aside for instance the bathroom and the kitchen. This requires quite different operating features in both systems concerning capacity, pump flow rate, pressure drop during water supply and so on.
  • Patents U.S. Pat. Nos. 2,121,625, 2,984,460, 3,425,485, 3,906,742, 4,798,240 and DE 2,140,018 describe central heating and cooling installations comprising a plurality of heat exchangers, each of which being arranged in a room of the various houses.
  • said heat exchangers are connected to a single boiler and to a single cooling device.
  • Such type of systems disadvantageously has a high thermal inertia, which can occur within an air-conditioning system.
  • This inertial reservoir acts as reserve of cooled water allowing to increase the system capacity and to obtain a longer life for cooling machines due to a smaller number of starts of said machines.
  • the monobloc unit is bulky, cumbersome and noisy, it should almost always be arranged outside the house to be conditioned, so that during summer the removed heat is not dispersed within the room itself.
  • the storage reservoir is equipped with a water inlet/outlet valve, i.e. with a valve allowing the reservoir to be completely emptied before winter and with a valve allowing said reservoir to be re-filled before summer.
  • Another solution to prevent water contained in the inertial reservoir from freezing consists in using electric heaters, which keep water within the reservoir liquid, thus ensuring that the heating and cooling system cannot be damaged due to the user's carelessness or to a very cold weather.
  • Electric heaters are for instance electric resistors that in order to carry out their function must absorb electric energy and turn it into heat. Obviously, such a contrivance results in that part of the advantages obtained with a storage reservoir are erased by the dissipation of energy necessary to supply said electric resistors. The dissipation of electric energy will be higher the greater the reservoir volume and the colder winter weather is.
  • the present invention aims at carrying out an air-conditioning system for external use without the disadvantages of prior art.
  • a further aim of the present invention is to supply an integrated heating and cooling unit that requires the least possible maintenance by the user.
  • FIG. 1 shows schematically a preferred embodiment of the air-conditioning system according to the present invention
  • FIG. 2 shows schematically a layout of a component of FIG. 1, in particular a layout of a gas boiler
  • FIG. 3 shows schematically a first operating configuration during summer of the air-conditioning system of FIG. 1;
  • FIG. 4 shows schematically a second operating configuration during winter of the air-conditioning system of FIG. 1.
  • FIG. 1 shows schematically an embodiment of the present invention consisting of a block 1 comprising a cooling circuit 2 , a control unit 3 and a storage reservoir 4 , a heating system 8 associated to said block 1 and a plurality of fan-convectors F 1 , . . . , Fn.
  • the block 1 and the heating system 8 thereto associated constitute the monobloc system that integrates all components for heating/conditioning the house.
  • the cooling circuit 2 is connected by means of a connection pipe A to a three-way switching valve V 1 , the latter being able to connect said cooling circuit 2 to a plurality of fan-convectors F 1 , . . . , Fn by means of a intake pipe 5 .
  • Said cooling circuit 2 is further connected by means of a connection pipe B to a circulation pump P 1 ; said circulation pump P 1 takes water to circulate in the cooling system 2 from the storage reservoir 4 by means of a connection pipe C.
  • Said storage reservoir 4 is connected in its turn to a plurality of fan-convectors F 1 , . . . , Fn by means of a return pipe 7 .
  • the storage reservoir 4 has in common with said plurality of fan-convectors F 1 , . . . , Fn the connection to the heating system 8 , which takes place by means of a connection pipe D.
  • connection pipe D is the extension of the return tube 7 of the fan-convectors F 1 , . . . , Fn.
  • the control of the cooling circuit 2 , of the fan-convectors F 1 , . . . , Fn as well as of the heating system 8 is in charge of the electronic control unit 3 , said control unit 3 being able to control all devices by means of a plurality of electric connections 9 in a per se known way.
  • the latter consists of a compressor 10 , of a capacitor 11 , of a lamination element 12 (or capillary) and of an evaporator 13 , each of said components being connected to the other by means of connection pipes E.
  • the compressor 10 is the core of the cooling circuit 2 and its function is to compress a cooling fluid, for instance freon or halogenated fluids, and to bring it to high pressure by heating it.
  • a cooling fluid for instance freon or halogenated fluids
  • a rotary compressor is used, whose great advantage with respect to traditional compressors is the absence of alternating movements and therefore of vibrations, thus ensuring silence and absence of vibrations to the user's immediate comfort.
  • an exchanger 14 Downstream from the compressor 10 an exchanger 14 is connected, on which a fan 15 is axially placed.
  • Said exchangers 14 are finned-tube exchangers and consist for instance of tubes made of scored copper or of stainless steel.
  • the fins of the exchangers (not shown in FIG. 1) can be made for instance of aluminum, copper or aluminum treated for environments with aggressive agents.
  • the cooling fluid which is liquid, gets through the lamination element 12 .
  • the lamination element 12 (also known as capillary) enables, as is well known, the expansion of the fluid and further allows to adjust the flow rate of said fluid.
  • Said lamination element 12 consists for instance of a copper tube with a length of 1-2 meters, wound on itself and having a diameter of some tenths of millimeter.
  • the lamination element 12 is preceded by a dehydrating filter 12 a and is followed by a silencer 12 b.
  • the function of the dehydrating filter 12 a is to eliminate water residues from the cooling fluid, thus ensuring the compressor 10 a longer life, whereas the function of the silencer 12 b, which can be for instance an absorption or resonance silencer, is to soften noises made by the cooling circuit 2 as a whole.
  • the cooling fluid gets through the evaporator 13 , which is carried out for instance using the technology, well known to a technician skilled in the art, of exchangers with welded-brazed plates.
  • the evaporator 13 is structurally the same as the capacitor 11 but has an exactly symmetrical function with respect to the latter; here the cooling liquid changes in opposite direction, i.e. shifts from liquid to vapor by absorbing heat from the environment. Therefore, the cooling fluid overheated at a high pressure gets from the compressor to the capacitor, then starts giving heat to the colder room air getting through it, i.e. at first temperature sinks due to the discharge of sensitive heat, until the state of saturated vapor is reached, i.e. constant pressure P and temperature T. This stage is followed by the condensing of the fluid, i.e. the state shift, from vapor to saturated liquid by means of the plate evaporator 13 .
  • the cooling fluid here as gas
  • the latent heat of condensation is given to a colder outside fluid, i.e. air in our case.
  • the cooling fluid must turn completely into gas within this evaporator and then, by getting through the connection pipes in the opposite direction, gets back to the compressor 10 .
  • cooling circuit described above from the static and dynamic point of view can also comprise other devices so as to work as a heat pump.
  • the lamination element 12 consists, as is well known to a technician in the field, of a capillary for cold operation, an additional capillary for heat pump operation and a unidirectional bypass valve.
  • a four-way valve for cycle inversion and a storage reservoir for cooling liquid should also be present.
  • the cooling circuit 2 as already described, is connected to the fan-convectors F 1 , . . . , Fn through the three-way switching (or mixing) valve V 1 by means of the intake pipe 5 .
  • the valve V 1 is equipped with an electric motor (not shown in FIG. 1), and on the basis of the electric signals sent by the electronic control unit 3 to said electric motor (which can be for instance an incremental motor) said three-way valve V 1 can be opened/closed.
  • the valve V 1 therefore allows the fluid connection through the intake pipe 5 to the fan-convectors F 1 , . . . , Fn acting as heating/cooling terminals whose radiant kit will be supplied according to the present invention with hot water during winter and with cooled water during summer.
  • Each fan-convector F 1 , . . . , Fn is equipped with a thermostat (not shown in FIG. 1) so as to adjust temperature and with a speed variator for the fans 16 allowing to choose the speed of thermal adjustment for the room.
  • the three-way switching valve V 1 is also connected, as already described, to the connection tube D acting as return tube of the heating system 8 .
  • the heating system 8 can be for instance an independent gas boiler or a centralized installation or a district heating system (not shown in FIG. 1).
  • FIG. 2 shows the layout of a gas boiler comprising an inner hydraulic circuit including a heat exchanger 17 , a series of burners 18 supplied by a tube 19 in which a throttle valve 20 is arranged, a circulation pump 21 , a hot water heater 22 for domestic hot water getting into the tube 23 and out of the tube 24 through the tap 25 , an expansion vessel 26 , a three-way valve 27 and a throttle valve 28 to bypass the boiler during summer.
  • the boiler 8 comprises also the connection pipe D acting as intake tube and the connection pipe E acting as return tube for the connection to the cooling circuit 2 .
  • the three-way valve 27 is controlled by a transducer 29 fitted into the outlet tube 24 of the hot water heater 22 .
  • This transducer 29 automatically switches the three-way valve 27 so as to put in communication hot water getting out of the heat exchanger 17 with the hot water heater 22 whenever the tap 25 is opened for supplying hot water for domestic use.
  • FIGS. 3 and 4 show schematically a first and second operating configuration, during summer and during winter respectively, of the air-conditioning system of FIG. 1 according to the present invention, it can be advantageously noted that the central branch of the three-way switching valve V 1 is always connected to the inlet or intake branch 5 of the fan-convectors F 1 , . . . , Fn.
  • the working of the air-conditioning system provides that the throttle valve 28 is closed and that the cooling circuit 2 is operated by the control unit 3 so as to circulate the cooling fluid within the heat exchanger in said cooling circuit 2 .
  • the three-way valve V 1 is switched by the control unit 3 , i.e. by the electronic control unit, so as to connect the connection tube A of the cooling circuit 2 , more precisely the outlet tube of the evaporator 13 , to the fan-convectors F 1 , . . . , Fn through the intake tube 5 .
  • the control unit 3 actuates the pump P 1 so that water coming back from the fan-convectors F 1 , . . . , Fn gets through the evaporator 13 of the cooling circuit 2 and then reaches the finned-tube exchanger 14 .
  • the refrigerated water is stored in the storage reservoir 4 before reaching the batteries of the fan-convectors F 1 , . . . , Fn.
  • the storage unit 4 acts in this first operating configuration as storage unit for cold water getting out through the connection pipe B in the evaporator 13 to enter into the intake pipe 5 of the fan-convectors F 1 , . . . , Fn.
  • the fans 16 of the fan-convectors F 1 , . . . , Fn can be operated separately by the control unit 3 , it is possible to cool during summer either all rooms in the house or only the rooms chosen by the user.
  • the cooling circuit 2 includes, as is well known to a technician in the field, all safety devices, not shown in FIGS. 1-4, that are required by the regulations on accident prevention.
  • the boiler 8 allows to heat the rooms of each detached house or block of flats since water within the hydraulic circuit leading to the fan-convectors F 1 , . . . , Fn (i.e. intake tube 5 ) is circulated by the pump 21 within the boiler 8 .Hot water can thus circulate in the fan-convectors F 1 , . . . , Fn and therefore heats the rooms of the house, whereas the cooling circuit 2 according to the present invention is bypassed by means of the three-way valve V 1 .
  • control unit 3 does not switch on the pump 1 and the cooling circuit 2 .
  • storage reservoir 4 does not act any more as cold water storage unit but as thermal inertia for water contained within the evaporator 13 .
  • the cooling unit i.e. the block 1 comprising the cooling circuit 2 , the control unit 3 and the storage reservoir 4 , is placed outside the house, no problem arises involving the freezing of the connection tubes during winter, because the latter do not contain water but a cooling fluid that does not freeze.
  • hot water within the return tube 5 of the fan-convectors F 1 , . . . , Fn by convection can keep water contained in the storage reservoir 4 liquid (i.e. prevents its freezing) also during winter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Central Air Conditioning (AREA)
  • Catching Or Destruction (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Air Conditioning Control Device (AREA)
US10/697,296 2002-11-12 2003-10-31 Air-conditioning system for rooms Abandoned US20040188082A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EPEP02425690.1 2002-11-12
EP02425690A EP1420214B1 (en) 2002-11-12 2002-11-12 Air-conditioning system for rooms

Publications (1)

Publication Number Publication Date
US20040188082A1 true US20040188082A1 (en) 2004-09-30

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ID=29762768

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US10/697,296 Abandoned US20040188082A1 (en) 2002-11-12 2003-10-31 Air-conditioning system for rooms

Country Status (8)

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US (1) US20040188082A1 (xx)
EP (1) EP1420214B1 (xx)
AT (1) ATE400777T1 (xx)
CA (1) CA2447397A1 (xx)
DE (1) DE60227533D1 (xx)
NO (1) NO327264B1 (xx)
PL (1) PL363400A1 (xx)
RU (1) RU2319078C2 (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080087027A1 (en) * 2006-10-17 2008-04-17 In Woong Park Water-cooled air conditioner
US20100206541A1 (en) * 2007-10-04 2010-08-19 Gary Stanton Webster Fan convector heating unit
US20150089963A1 (en) * 2012-04-06 2015-04-02 Zhongxi Tan Central air-conditioning system and control method thereof
WO2020227160A1 (en) * 2019-05-05 2020-11-12 Chilled Beam Controls, LLC System and apparatus for conditioning of indoor air
US10900675B2 (en) * 2012-12-03 2021-01-26 Waterfurnace International, Inc. Method of operating a heating and cooling system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2913757B1 (fr) * 2007-03-14 2009-07-03 Jose Breard Dispositif de couplage d'un systeme de chauffage a liquide caloporteur a un dispositif de refroidissement
RU2545126C1 (ru) * 2013-12-23 2015-03-27 Владимир Павлович Лобко Система поддержания температурного режима в помещении

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121625A (en) * 1936-11-17 1938-06-21 Gen Electric Heating and cooling system
US2984460A (en) * 1956-05-21 1961-05-16 Bell & Gossett Co Combined heating and cooling system
US3425485A (en) * 1967-06-28 1969-02-04 Borg Warner Air conditioning unit and pump for single pipe system
US3654988A (en) * 1970-02-24 1972-04-11 American Standard Inc Freeze protection for outdoor cooler
US3906742A (en) * 1972-12-04 1975-09-23 Borg Warner Air conditioning system utilizing ice slurries
US4798240A (en) * 1985-03-18 1989-01-17 Gas Research Institute Integrated space heating, air conditioning and potable water heating appliance
US5244037A (en) * 1992-03-23 1993-09-14 Warnke Dallas H Closed loop ground source pressurized system for a heat pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1246171B (it) * 1990-07-27 1994-11-16 Riello Condizionatori Sas Impianto di riscaldamento e raffreddamento monoblocco
DK0508245T3 (da) * 1991-04-09 1996-03-11 Riello Condizionatori Sas Kølemodul til forbindelse med kedler i selvstændige varmesystemer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121625A (en) * 1936-11-17 1938-06-21 Gen Electric Heating and cooling system
US2984460A (en) * 1956-05-21 1961-05-16 Bell & Gossett Co Combined heating and cooling system
US3425485A (en) * 1967-06-28 1969-02-04 Borg Warner Air conditioning unit and pump for single pipe system
US3654988A (en) * 1970-02-24 1972-04-11 American Standard Inc Freeze protection for outdoor cooler
US3906742A (en) * 1972-12-04 1975-09-23 Borg Warner Air conditioning system utilizing ice slurries
US4798240A (en) * 1985-03-18 1989-01-17 Gas Research Institute Integrated space heating, air conditioning and potable water heating appliance
US5244037A (en) * 1992-03-23 1993-09-14 Warnke Dallas H Closed loop ground source pressurized system for a heat pump

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080087027A1 (en) * 2006-10-17 2008-04-17 In Woong Park Water-cooled air conditioner
US20080087030A1 (en) * 2006-10-17 2008-04-17 In Woong Park Water-cooled air conditioner
US8281614B2 (en) * 2006-10-17 2012-10-09 Lg Electronics Inc. Water-cooled air conditioner
US8286445B2 (en) 2006-10-17 2012-10-16 Lg Electronics Inc. Water-cooled air conditioner
US20100206541A1 (en) * 2007-10-04 2010-08-19 Gary Stanton Webster Fan convector heating unit
US20150089963A1 (en) * 2012-04-06 2015-04-02 Zhongxi Tan Central air-conditioning system and control method thereof
US9845983B2 (en) * 2012-04-06 2017-12-19 Zhongxi Tan Central air-conditioning system and control method thereof
US10900675B2 (en) * 2012-12-03 2021-01-26 Waterfurnace International, Inc. Method of operating a heating and cooling system
US11713890B2 (en) 2012-12-03 2023-08-01 Waterfurnace International, Inc. Method of operating a heating and cooling system
WO2020227160A1 (en) * 2019-05-05 2020-11-12 Chilled Beam Controls, LLC System and apparatus for conditioning of indoor air
US11768006B2 (en) 2019-05-05 2023-09-26 Ft Energy Controls, Llc System and apparatus for conditioning of indoor air

Also Published As

Publication number Publication date
NO20035013L (no) 2004-05-13
PL363400A1 (en) 2004-05-17
EP1420214A1 (en) 2004-05-19
NO327264B1 (no) 2009-05-25
EP1420214B1 (en) 2008-07-09
RU2319078C2 (ru) 2008-03-10
CA2447397A1 (en) 2004-05-12
RU2003132884A (ru) 2005-04-20
NO20035013D0 (no) 2003-11-11
ATE400777T1 (de) 2008-07-15
DE60227533D1 (de) 2008-08-21

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Owner name: AERMEC, ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RIELLO, VALERIO GIORDANO;REEL/FRAME:015202/0686

Effective date: 20040402

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Owner name: AERMEE S.P.A., ITALY

Free format text: CORRECTIVE ASSIGMENT TO CORRECT ASSIGNEE NAME R15202 F0686;ASSIGNOR:RIELLO, VALERIO GIORDANO;REEL/FRAME:016678/0181

Effective date: 20050222

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION