EP1830136B1 - Cooling unit for air conditioning systems - Google Patents

Cooling unit for air conditioning systems Download PDF

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Publication number
EP1830136B1
EP1830136B1 EP07003618A EP07003618A EP1830136B1 EP 1830136 B1 EP1830136 B1 EP 1830136B1 EP 07003618 A EP07003618 A EP 07003618A EP 07003618 A EP07003618 A EP 07003618A EP 1830136 B1 EP1830136 B1 EP 1830136B1
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EP
European Patent Office
Prior art keywords
cooling
coolant
air
cooling unit
circulating
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.)
Not-in-force
Application number
EP07003618A
Other languages
German (de)
French (fr)
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EP1830136A1 (en
Inventor
Pekka Mäkinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flaekt Woods AB
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Flaekt Woods AB
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Publication date
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Publication of EP1830136A1 publication Critical patent/EP1830136A1/en
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Publication of EP1830136B1 publication Critical patent/EP1830136B1/en
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D9/00—Central heating systems employing combinations of heat transfer fluids covered by two or more of groups F24D1/00 - F24D7/00
    • 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
    • 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
    • F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression

Definitions

  • the present invention relates to a cooling unit Installable into the air-conditioning systems of buildings for cooling/heating the indoor air thereof, the indoor spaces being cooled/heated by the supply air and liquid coolant-circulating cooling elements, wherein in addition to the Intake air cooling/heating function, the cooling unit comprises coupled with the same main circuit a coolant-circulating cooler coupled with the coolant-circulating cooling elements that cool the indoor space.
  • the implementation of the cooling function In the air conditioning systems of buildings is generally based on cooling the indoor space by means of both a flow of chilled supply air as well as cooling devices such as cooling coils mounted in the indoor space.
  • a coolant medium such as water is circulated in the cooling coils
  • a water cooler produces chilled water that is circulated via the cooling coil of the intake air unit and the cooling devices of the indoor space.
  • a separate rooftop evaporator/condenser is necessary for transferring the heat exhausted from the indoor space to the outside air.
  • a concurrent A/C system needs three different units: an intake air cooling unit, a cooler of the circulating refrigerant and a rooftop evaporator/condenser,
  • a prior-art cooling unit known by trademark "Cooler” in the applicant's product selection comprises an integrated functional unit that can be coupled with a building's air-conditioning machinery and serves to cool the intake air delivered into the building's indoor spaces,
  • this cooler is ready-to-use unit incorporating factory-mounted compressor machinery with an electrical/control system thereof, Heat removed from the intake air is transferred to a condenser coil located in the exhaust air flow and finally dissipated to the outdoor air about the building.
  • the greatest shortcoming of a standard-type cooling unit is that the cooling effect is imposed only on the supply air However, cooling the intake air alone does not provide a sufficiently high cooling effect unless very massive air flow rates are used.
  • a cooling unit for air conditioning systems comprising an air intake for supply air and liquid coolant cooling elements, wherein, in addition to the intake air cooling function, the cooling unit comprises a cooler coupled with the liquid circuit of the cooling elements.
  • the cooling unit comprises two compressors and two heat exchangers serving to cool the coolant-circulating cooling elements of the indoor spaces and that the coolant-circulating line has therewith coupled another line that with the help of a pump circulates the coolant via the intake air cooling coil thus accomplishing the cooling of the supply air.
  • a preferred embodiment of the cooling unit according to the invention is characterized in that the cooling unit incorporates an integral function for heating the supply air.
  • Another preferred embodiment of the cooling unit according to the invention is characterized in that a low temperature of the outdoor air is utilized for cooling the liquid coolant circulating in the indoor space A/C devices.
  • a still another preferred embodiment of the cooling unit according to the invention is characterized in that the liquid coolant returning from the liquid-coolant-circulating indoor space A/C devices (7) is routed via a valve (11) to the inlet air cooling coil (3) of the cooling unit, wherein the liquid coolant is cooled whereupon the coolant is passed to the evaporator (4) for further cooling.
  • the cooling unit according to the invention is installed as a unitary functional section into the air conditioning machinery. Complementing the intake air heating, the cooling unit according to the invention incorporates coupled with the same main circuit an evaporator (circulating cooling unit) that is coupled with the refrigerant circuit of the cooling coils.
  • evaporator circulating cooling unit
  • This arrangement permits a single factory-assembled unit to manage the entire cooling needs of a building. In normal applications, the water cooler can be omitted and a separate rooftop evaporator/condenser unit becomes redundant, too.
  • FIG. 1 therein is shown the circuit configuration of a cooling unit wherein a compressor 1 cools the intake air with the help of a heat exchanger 3.
  • Compressors 2 serve to cool with the help of refrigerant/coolant heat exchangers 4 the liquid coolant circulating in the piping network of indoor space A/C devices 7.
  • a pump 6 circulates the cooled liquid coolant in the indoor space A/C devices 7 that render the cooling of the indoor air.
  • the heat dissipation of the compressors is passed to an evaporator/condenser coil 5 of the cooling unit, where the heat dissipated from the cooling process is transferred via the cooling unit to the exhaust air passing out of the A/C system.
  • the power output of compressors 1, 2 can be controlled stagewise and mutually distributed such that a desired cooling effect is selectively delivered to any point needing cooling, while the exhaust air temperature is simultaneously prevented from rising excessively high.
  • FIG. 2 is shown the circuit configuration of an embodiment of the invention. Its layout is basically similar to that of FIG. 1 , while this layout has two compressors in lieu of the three in the embodiment described above, whereby herein the compressors 1 via the refrigerant/coolant heat exchangers 4 cool the coolant circulating in the piping network 8. Respectively, pump 9 circulates the coolant in the intake air cooling coil that serves to cool the supply air. Pump 6 circulates the cooled liquid coolant in the indoor space A/C devices 7 that accomplish the cooling of the indoor air. The heat dissipation of the compressors is passed to an evaporator/condenser coil 3 of the cooling unit..
  • FIG. 3 shows a circuit configuration according to another embodiment of the inventtion offering the possibility of using the intake air cooling coil alternatively for heating the intake air while the water circulating as coolant in the piping network 8 serves to cool the indoor space A/C devices.
  • the integration of the heating function into the cooling unit gives the benefit of allowing the omission of a separate intake air heating coil from the A/C machinery. By the same token are eliminated the pressure losses of the intake air heater coil and the input power of blowers is reduced.
  • the omission of the heating coil also reduces the space required by the A/C machinery length in the rooftop machinery room by about 700 mm, which is a significant benefit.
  • the circuit diagram of the present embodiment functions as follows: compressors 1 cool via heat exchangers 4 the coolant circulating in the piping network 8.
  • Pump 6 circulates the cooled coolant in the indoor space A/C devices 7 that accomplish the cooling of the indoor air.
  • the indoor-mounted pump 9 circulates the coolant of the same piping network system via the supply air heat exchanger 3 (liquid coolant/air heat exchanger).
  • This cooling circuit 12 is diverted apart from liquid coolant circulation of the indoor air cooling devices by a valve 11.
  • the thermal energy required for heating the supply air is introduced into the auxiliary circuit 12 via a liquid/liquid heat exchanger 10.
  • the indoor space A/C cooling devices can be fed with a liquid coolant cooled in the evaporator 4 and at the same time warm water may be fed to the supply air heat exchanger 3, while simultaneously the intake air is being heated to the desired set temperature of supply air.
  • the invention also makes it possible to implement the utilization of a low temperature of the outdoor air for cooling the liquid coolant circulating in the indoor space A/C devices, whereby this "free circulation" is run having the compressors stopped.
  • this "free circulation” As the water coolant circulating in the piping network of indoor space A/C devices herein also passes through the inlet air cooling coil of the cooling unit, it becomes possible to employ this "free-circulation" cooling facility when the building needs cooling and the outdoor air is sufficiently low, i.e., about 10-15 °C, to achieve a cooling effect. Cooling by "free circulation” also allows the cooling effect offered by passing the cold outdoor air through the intake air cooling coil to be transferred to the piping network of the indoor space A/C devices and therefrom to a desired indoor space. Cooling by means of "free circulation” permits the electrical energy budget of a building to be reduced significantly.
  • the liquid coolant returning from the cooling devices 7 is routed via a valve 11 to the intake air cooling coil 3 of the cooling unit.
  • the coolant temperature is about 19 °C.
  • the liquid coolant is cooled in the intake air cooling coil to a temperature of, e.g., 17 °C.
  • the cooled coolant is passed forward to the evaporator 4 of the cooling unit, wherein it is cooled further so that the liquid coolant finally is cooled down to the temperature of, e.g., about 15 °C, necessary for operating the piping network of the indoor space A/C devices. Cooling the liquid coolant in the intake air cooling coil becomes possible when the outdoor air temperature is below 19°C.
  • the coolant medium of the liquid-coolant-circulating indoor space A/C devices may be any type of liquid employed in this kind of application as required to comply with the local constraints.
  • the number of compressors and heat exchangers mentioned in the claims and description above are exemplary by definition and may be varied as desired.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Air-Conditioning For Vehicles (AREA)
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  • Crystals, And After-Treatments Of Crystals (AREA)
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  • Fats And Perfumes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Saccharide Compounds (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
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Abstract

The invention relates to a cooling unit installable into the air-conditioning systems of buildings for cooling/heating the indoor air thereof, the indoor spaces being cooled/heated by the supply air and liquid coolant-circulating cooling elements (7), The invention is implemented by way of complementing the intake air cooling/heating function of the cooling unit with a liquid-coolant cooler coupled to the same main circuit and passing the coolant to liquid-coolant circulating cooling devices (7) serving to cool the indoor spaces,

Description

  • The present invention relates to a cooling unit Installable into the air-conditioning systems of buildings for cooling/heating the indoor air thereof, the indoor spaces being cooled/heated by the supply air and liquid coolant-circulating cooling elements, wherein in addition to the Intake air cooling/heating function, the cooling unit comprises coupled with the same main circuit a coolant-circulating cooler coupled with the coolant-circulating cooling elements that cool the indoor space.
  • Currently, the implementation of the cooling function In the air conditioning systems of buildings is generally based on cooling the indoor space by means of both a flow of chilled supply air as well as cooling devices such as cooling coils mounted in the indoor space. A coolant medium such as water is circulated in the cooling coils, For this purpose, a water cooler produces chilled water that is circulated via the cooling coil of the intake air unit and the cooling devices of the indoor space. In addition to the water cooler, a separate rooftop evaporator/condenser is necessary for transferring the heat exhausted from the indoor space to the outside air. Hence, a concurrent A/C system needs three different units: an intake air cooling unit, a cooler of the circulating refrigerant and a rooftop evaporator/condenser,
  • A prior-art cooling unit known by trademark "Cooler" in the applicant's product selection comprises an integrated functional unit that can be coupled with a building's air-conditioning machinery and serves to cool the intake air delivered into the building's indoor spaces, In more detail, this cooler is ready-to-use unit incorporating factory-mounted compressor machinery with an electrical/control system thereof, Heat removed from the intake air is transferred to a condenser coil located in the exhaust air flow and finally dissipated to the outdoor air about the building. The greatest shortcoming of a standard-type cooling unit is that the cooling effect is imposed only on the supply air However, cooling the intake air alone does not provide a sufficiently high cooling effect unless very massive air flow rates are used.
  • From US-A-4,446,703 it is known a cooling unit for air conditioning systems comprising an air intake for supply air and liquid coolant cooling elements, wherein, in addition to the intake air cooling function, the cooling unit comprises a cooler coupled with the liquid circuit of the cooling elements.
  • It is an object of the present invention to provide a novel type of cooling unit installable into the A/C system of buildings, the cooling unit being able to overcome the problems of the prior-art system and to simplify the system construction in a significant fashion. The cooling unit according to the invention is characterized in that the cooling unit comprises two compressors and two heat exchangers serving to cool the coolant-circulating cooling elements of the indoor spaces and that the coolant-circulating line has therewith coupled another line that with the help of a pump circulates the coolant via the intake air cooling coil thus accomplishing the cooling of the supply air.
  • A preferred embodiment of the cooling unit according to the invention is characterized in that the cooling unit incorporates an integral function for heating the supply air.
  • Another preferred embodiment of the cooling unit according to the invention is characterized in that a low temperature of the outdoor air is utilized for cooling the liquid coolant circulating in the indoor space A/C devices.
  • A still another preferred embodiment of the cooling unit according to the invention is characterized in that the liquid coolant returning from the liquid-coolant-circulating indoor space A/C devices (7) is routed via a valve (11) to the inlet air cooling coil (3) of the cooling unit, wherein the liquid coolant is cooled whereupon the coolant is passed to the evaporator (4) for further cooling.
  • The cooling unit according to the invention is installed as a unitary functional section into the air conditioning machinery. Complementing the intake air heating, the cooling unit according to the invention incorporates coupled with the same main circuit an evaporator (circulating cooling unit) that is coupled with the refrigerant circuit of the cooling coils. This arrangement permits a single factory-assembled unit to manage the entire cooling needs of a building. In normal applications, the water cooler can be omitted and a separate rooftop evaporator/condenser unit becomes redundant, too.
  • The invention is next described in more detail with the help of preferred exemplary embodiments by making reference to the appended drawings in which
    • FIG. 1 shows the circuit configuration of a cooling unit;
    • FIG. 2 shows the circuit configuration of a preferred embodiment according to the invention;
    • FIG. 3 shows the circuit configuration of another preferred embodiment according to the invention; and
    • FIG. 4 shows the circuit configuration of another preferred embodiment according to the invention.
  • Referring to FIG. 1, therein is shown the circuit configuration of a cooling unit wherein a compressor 1 cools the intake air with the help of a heat exchanger 3. Compressors 2 serve to cool with the help of refrigerant/coolant heat exchangers 4 the liquid coolant circulating in the piping network of indoor space A/C devices 7. A pump 6 circulates the cooled liquid coolant in the indoor space A/C devices 7 that render the cooling of the indoor air. The heat dissipation of the compressors is passed to an evaporator/condenser coil 5 of the cooling unit, where the heat dissipated from the cooling process is transferred via the cooling unit to the exhaust air passing out of the A/C system. The power output of compressors 1, 2 can be controlled stagewise and mutually distributed such that a desired cooling effect is selectively delivered to any point needing cooling, while the exhaust air temperature is simultaneously prevented from rising excessively high.
  • In FIG. 2 is shown the circuit configuration of an embodiment of the invention. Its layout is basically similar to that of FIG. 1, while this layout has two compressors in lieu of the three in the embodiment described above, whereby herein the compressors 1 via the refrigerant/coolant heat exchangers 4 cool the coolant circulating in the piping network 8. Respectively, pump 9 circulates the coolant in the intake air cooling coil that serves to cool the supply air. Pump 6 circulates the cooled liquid coolant in the indoor space A/C devices 7 that accomplish the cooling of the indoor air. The heat dissipation of the compressors is passed to an evaporator/condenser coil 3 of the cooling unit..
  • Under certain outdoor air temperature conditions, the intake air must be heated even when the indoor air of the building requires cooling. FIG. 3 shows a circuit configuration according to another embodiment of the inventtion offering the possibility of using the intake air cooling coil alternatively for heating the intake air while the water circulating as coolant in the piping network 8 serves to cool the indoor space A/C devices. The integration of the heating function into the cooling unit gives the benefit of allowing the omission of a separate intake air heating coil from the A/C machinery. By the same token are eliminated the pressure losses of the intake air heater coil and the input power of blowers is reduced. The omission of the heating coil also reduces the space required by the A/C machinery length in the rooftop machinery room by about 700 mm, which is a significant benefit.
  • Referring again in greater detail to FIG. 3, the circuit diagram of the present embodiment functions as follows: compressors 1 cool via heat exchangers 4 the coolant circulating in the piping network 8. Pump 6 circulates the cooled coolant in the indoor space A/C devices 7 that accomplish the cooling of the indoor air. The indoor-mounted pump 9 circulates the coolant of the same piping network system via the supply air heat exchanger 3 (liquid coolant/air heat exchanger). This cooling circuit 12 is diverted apart from liquid coolant circulation of the indoor air cooling devices by a valve 11. The thermal energy required for heating the supply air is introduced into the auxiliary circuit 12 via a liquid/liquid heat exchanger 10. By virtue of having the circuits 8, 12 running separately from each other, it is possible to operate these two circuits at different temperature levels. Thence the indoor space A/C cooling devices can be fed with a liquid coolant cooled in the evaporator 4 and at the same time warm water may be fed to the supply air heat exchanger 3, while simultaneously the intake air is being heated to the desired set temperature of supply air.
  • The invention also makes it possible to implement the utilization of a low temperature of the outdoor air for cooling the liquid coolant circulating in the indoor space A/C devices, whereby this "free circulation" is run having the compressors stopped. As the water coolant circulating in the piping network of indoor space A/C devices herein also passes through the inlet air cooling coil of the cooling unit, it becomes possible to employ this "free-circulation" cooling facility when the building needs cooling and the outdoor air is sufficiently low, i.e., about 10-15 °C, to achieve a cooling effect. Cooling by "free circulation" also allows the cooling effect offered by passing the cold outdoor air through the intake air cooling coil to be transferred to the piping network of the indoor space A/C devices and therefrom to a desired indoor space. Cooling by means of "free circulation" permits the electrical energy budget of a building to be reduced significantly.
  • Next, the "free circulation" discussed above is elucidated in more detail by making reference to FIG. 4. The liquid coolant returning from the cooling devices 7 is routed via a valve 11 to the intake air cooling coil 3 of the cooling unit. At this instant, the coolant temperature is about 19 °C. The liquid coolant is cooled in the intake air cooling coil to a temperature of, e.g., 17 °C. The cooled coolant is passed forward to the evaporator 4 of the cooling unit, wherein it is cooled further so that the liquid coolant finally is cooled down to the temperature of, e.g., about 15 °C, necessary for operating the piping network of the indoor space A/C devices. Cooling the liquid coolant in the intake air cooling coil becomes possible when the outdoor air temperature is below 19°C.
  • To a person skilled in the art it is obvious that the invention is not limited by the above-described exemplary embodiments, but rather may be varied within the inventive scope of the appended claims. The coolant medium of the liquid-coolant-circulating indoor space A/C devices may be any type of liquid employed in this kind of application as required to comply with the local constraints. Furthermore, the number of compressors and heat exchangers mentioned in the claims and description above are exemplary by definition and may be varied as desired.

Claims (4)

  1. A cooling unit installable into the air-conditioning systems of buildings for cooling/heating the indoor air thereof, the indoor spaces being cooled/heated by the supply air and liquid coolant-circulating cooling elements (7), wherein in addition to the intake air cooling/heating function, the cooling unit comprises coupled with the same main circuit a coolant-circulating cooler coupled with the coolant-circulating cooling elements (7) that cool the indoor space, characterized in that the cooling unit comprises two compressors (1) and two heat exchangers (4) serving to cool the coolant-circulating cooling elements (7) of the indoor spaces and that the coolant-circulating line has therewith coupled another line that with the help of a pump (9) circulates the coolant via an intake air cooling coil (3) thus accomplishing the cooling of the supply air.
  2. The cooling unit of of claim 1, characterized in that the cooling unit incorporates an integral function for heating the supply air.
  3. The cooling unit of claim 1, characterized in that a low temperature of the outdoor air is utilized for cooling the liquid coolant circulating in the indoor space A/C devices (7).
  4. The cooling unit of claim 3, characterized in that the liquid coolant returning from the liquid-coolant-circulating indoor space A/C devices (7) is routed via a valve (11) to the inlet air cooling coil (3) of the cooling unit, wherein the liquid coolant is cooled whereupon the coolant is passed to the evaporator (4) for further cooling.
EP07003618A 2006-03-03 2007-03-01 Cooling unit for air conditioning systems Not-in-force EP1830136B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20060213A FI20060213L (en) 2006-03-03 2006-03-03 Cooling unit

Publications (2)

Publication Number Publication Date
EP1830136A1 EP1830136A1 (en) 2007-09-05
EP1830136B1 true EP1830136B1 (en) 2011-06-15

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EP (1) EP1830136B1 (en)
KR (1) KR101335983B1 (en)
CN (1) CN101029757B (en)
AT (1) ATE513170T1 (en)
DK (1) DK1830136T3 (en)
FI (1) FI20060213L (en)
NO (1) NO339882B1 (en)
RU (1) RU2435110C2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20085412L (en) * 2008-05-06 2009-11-07 Flaekt Woods Ab Procedure for using outdoor air to cool room devices
FI124862B (en) * 2008-05-06 2015-02-27 Fläkt Woods AB Procedure for cooling supply air
IL193004A0 (en) * 2008-07-23 2009-08-03 Joul Srhan Deviding unit of the air-conditioner
US8640469B2 (en) * 2011-08-08 2014-02-04 The Boeing Company Aircraft supplemental liquid cooler and method
KR102403512B1 (en) 2015-04-30 2022-05-31 삼성전자주식회사 Outdoor unit of air conditioner, control device applying the same
UA104941U (en) * 2015-09-10 2016-02-25 Іван Іванович Котурбач REFRIGERANT COOLING SYSTEM
SI3492824T1 (en) * 2017-11-29 2021-03-31 Tom Ascough Method for conditioning air
CN110081576A (en) * 2018-01-25 2019-08-02 北京方鸿智能科技有限公司 Circulation device for air and the blower air circulatory system for the station with blower

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140018A1 (en) * 1971-08-10 1973-02-15 Kaelte Waerme Klimatechnik Gmb HEAT PUMP HEATING OR COOLING DEVICE
DE2364020A1 (en) * 1973-12-21 1975-07-03 Kulmbacher Klimageraete AIR CONDITIONING UNIT
US4446703A (en) * 1982-05-25 1984-05-08 Gilbertson Thomas A Air conditioning system and method
US4483152A (en) * 1983-07-18 1984-11-20 Butler Manufacturing Company Multiple chiller control method
JP3100074B2 (en) * 1991-06-26 2000-10-16 ダイキン工業株式会社 Cooling system
JPH0828977A (en) * 1994-07-15 1996-02-02 Daikin Ind Ltd Cooling device of double freezer system
JP2000093733A (en) * 1998-09-22 2000-04-04 Ebara Corp Dehumidifying and air-conditioning apparatus
KR100565257B1 (en) * 2004-10-05 2006-03-30 엘지전자 주식회사 Secondary refrigerant cycle using compressor and air conditioner having the same

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FI20060213A0 (en) 2006-03-03
NO339882B1 (en) 2017-02-13
RU2007108018A (en) 2008-09-10
CN101029757B (en) 2011-06-08
NO20071154L (en) 2007-09-04
KR101335983B1 (en) 2013-12-04
KR20070090781A (en) 2007-09-06
EP1830136A1 (en) 2007-09-05
FI20060213L (en) 2007-09-04
ATE513170T1 (en) 2011-07-15
DK1830136T3 (en) 2011-09-26
CN101029757A (en) 2007-09-05
RU2435110C2 (en) 2011-11-27

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