US20060150667A1 - Heat exchanger and air conditioner using the same - Google Patents

Heat exchanger and air conditioner using the same Download PDF

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Publication number
US20060150667A1
US20060150667A1 US11/302,386 US30238605A US2006150667A1 US 20060150667 A1 US20060150667 A1 US 20060150667A1 US 30238605 A US30238605 A US 30238605A US 2006150667 A1 US2006150667 A1 US 2006150667A1
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US
United States
Prior art keywords
refrigerant
path
heat exchanger
set forth
air conditioner
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
US11/302,386
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English (en)
Inventor
Won Lee
Seung Hyun
Jae Sim
Yoon Hwang
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HWANG, YOON JEI, HYUN, SEUNG YOUP, LEE, WON HEE, SIM, JAE HOON
Publication of US20060150667A1 publication Critical patent/US20060150667A1/en
Abandoned legal-status Critical Current

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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • 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
    • 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
    • F25B39/00—Evaporators; Condensers
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/06—Derivation channels, e.g. bypass

Definitions

  • the present invention relates to an air conditioner, and, more particularly, to a heat exchanger which contains a path switching member for switching the flow path of a refrigerant, thereby achieving easy control of cooling or heating capacity based on an external load, and an air conditioner using the same.
  • an air conditioner is an apparatus for cooling or heating a room, in order to create a more pleasant room environment.
  • the air conditioner sucks indoor air to heat or cool the air, and discharges the heated or cooled air into a room.
  • FIG. 1 is a configuration diagram schematically illustrating a conventional air conditioner.
  • FIG. 2 is a configuration diagram schematically illustrating the interior of a conventional heat exchanger.
  • the conventional air conditioner comprises: a compressor 2 to compress low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure state; a condenser to condense the refrigerant, discharged from the compressor 2 , into liquid refrigerant by emitting heat to the surroundings (i.e. an outdoor heat exchanger 4 upon cooling, or indoor heat exchanger 8 upon heating); an expansion member 6 to expand the liquid refrigerant, condensed by the condenser, into a low-temperature and low-pressure 2-phase gas/liquid refrigerant; and an evaporator to change the 2-phase refrigerant into the gaseous refrigerant by absorbing heat from the surroundings (i.e. the indoor heat exchanger 8 upon cooling, or outdoor heat exchanger 4 upon heating).
  • the compressor 2 is a constant-speed compressor having a constant capacity.
  • a bypass member 10 is installed between suction and discharge portions of the compressor 2 , in order to control the capacity of the compressor 2 when a desired cooling load is low as compared to the capacity of the compressor 2 .
  • the bypass member 10 includes: a bypass path 12 to connect the suction and discharge portions of the compressor 2 ; and an opening/closing valve 14 provided at the bypass path 12 to open or close the bypass path 12 .
  • the indoor heat exchanger 4 includes: a panel shaped heat exchanger body 16 to perform a heat exchange operation between a refrigerant and outdoor air; a suction header 18 provided at a side of the heat exchanger body 16 to suck the refrigerant discharged from the compressor 2 ; one or more tubes 20 branched from the suction header 18 ; and a discharge header 22 to discharge the heat exchanged refrigerant, the tubes 20 being merged at the discharge header 22 .
  • the interior configuration of the indoor heat exchanger is applicable to the outdoor heat exchanger in the same manner.
  • the conventional air conditioner having the above-described configuration performs a cooling operation, first, the high-temperature and high-pressure refrigerant, discharged from the compressor 2 , is introduced into the outdoor heat exchanger 4 that serves as a condenser. Thereby, the refrigerant emits heat to the surroundings.
  • the refrigerant having passed through the outdoor heat exchanger 4 , expands into a low-temperature and low-pressure state while passing through the expansion member 6 . After that, the low-temperature and low-pressure refrigerant is introduced into the indoor heat exchanger 8 .
  • the refrigerant absorbs heat from indoor air, thereby achieving the cooling of a room.
  • the opening/closing valve 14 is opened, so that a part of the refrigerant, discharged from the compressor 2 , is again introduced into the suction portion of the compressor 2 via the bypass path 12 .
  • Disadvantages of the conventional air conditioner includes the fact that, as a method for controlling the cooling capacity of the air conditioner based on a cooling load, it attempts to bypass the refrigerant discharged from the compressor 2 to regulate the flow rate of the refrigerant.
  • a limitation to vary the flow rate of the refrigerant being bypassed based on an external load.
  • the conventional air conditioner exhibits excessive electricity consumption, suffering from low energy efficiency.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a heat exchanger in which a refrigerant path switching unit is provided, thereby achieving an appropriate control of cooling or heating capacity based on a varying external load, and an air conditioner using the same.
  • a heat exchanger comprising: a refrigerant path defined inside a heat exchanger body for the passage of a refrigerant; and at least one path switching unit provided at the refrigerant path to switch the flow path of the refrigerant, in order to regulate the flow rate of the refrigerant passing through the refrigerant path.
  • the path switching unit may include: a bypass path to bypass the refrigerant passing through the refrigerant path; and an opening/closing valve to open or close the bypass path.
  • the at least one path switching unit may include a plurality of path switching units.
  • the refrigerant path may include: a suction header to suck the refrigerant; a discharge header to discharge the heat exchanged refrigerant; and at least one tube to connect the suction header to the discharge header for the passage of the refrigerant.
  • the bypass path may be formed between the tube and the discharge header.
  • the opening/closing valve may be installed at a connection location between the refrigerant path and the bypass path.
  • the opening/closing valve may be a 3-way valve.
  • the at least one tube may include a plurality of tubes branched from the suction header.
  • the at least one path switching unit may include a plurality of path switching units, and the bypass path of each of the path switching units is connected to an associated one of the tubes.
  • the tube may have a multiple-bend shape, and the bypass path may connect a bent portion of the tube to the discharge header.
  • the heat exchanger provided with the path switching unit is used along with a variable capacity compressor, a variation of capacity is possible even under a low load condition with reduced electricity consumption.
  • FIG. 1 is a configuration diagram schematically illustrating a conventional air conditioner
  • FIG. 2 is a configuration diagram schematically illustrating the interior of a conventional heat exchanger
  • FIG. 3 is a configuration diagram schematically illustrating an air conditioner according to an embodiment of the present invention.
  • FIG. 4 is a configuration diagram schematically illustrating the interior of a heat exchanger according to the embodiment of the present invention.
  • FIG. 3 is a configuration diagram schematically illustrating an air conditioner according to an embodiment of the present invention.
  • FIG. 4 is a configuration diagram schematically illustrating the interior of a heat exchanger provided in the air conditioner according to the embodiment of the present invention.
  • the air conditioner comprises: a compressor 50 to compress low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure state; a condenser to condense the refrigerant, discharged from the compressor 50 , into liquid refrigerant by emitting heat to the surroundings (i.e. an outdoor heat exchanger 52 upon cooling, or indoor heat exchanger 54 upon heating); an expansion member 56 to expand the liquid refrigerant, condensed by the condenser, into a low-temperature and low-pressure 2-phase gas/liquid refrigerant; and an evaporator to change the 2-phase refrigerant into gaseous refrigerant by absorbing heat of the surroundings (i.e. the indoor heat exchanger 54 upon cooling, or outdoor heat exchanger 52 upon heating).
  • the compressor 50 may be a constant-speed compressor having a constant capacity, or may be a variable capacity compressor. The following description is limited to the use of the constant-speed compressor.
  • the indoor heat exchanger 54 includes: a refrigerant path defined inside a heat exchanger body 64 for the passage of the refrigerant; and a path switching unit 70 to switch the flow path of the refrigerant, in order to regulate the flow rate of the refrigerant passing through the refrigerant path.
  • the refrigerant path includes: a suction header 60 to suck the refrigerant; a discharge header 62 to discharge the heat exchanged refrigerant; and a plurality of tubes to connect the suction header 60 to the discharge header 62 for allowing for the passage of the refrigerant from the suction header 60 to the discharge header 62 .
  • the plurality of tubes are branched from the suction header 60 , and each has a multiple-bend shape.
  • the discharge header 62 is configured so that the plurality of tubes are merged thereat.
  • the heat exchanger body 64 has a panel shape.
  • the plurality of tubes are enclosed by the heat exchanger body 64 .
  • Both the suction header 60 and the discharge header 62 may be arranged at a side of the heat exchanger body 64 together, or may be arranged at both sides of the heat exchanger body 64 , respectively.
  • first tube 66 and a second tube 68 .
  • each of the first and second tubes 66 and 68 is connected to the suction header 60 , and the other ends of the first and second tubes 66 and 68 are connected to the discharge header 62 .
  • the path switching unit 70 includes: first and second bypass paths 72 and 76 ; and opening/closing valves 74 and 78 to open or close the first and second bypass paths 72 and 76 , respectively.
  • the first and second bypass paths 72 and 76 connect bent portions of the first and second tubes 66 and 68 to the discharge header 62 , respectively, to bypass the refrigerant, passing through the first and second tubes 66 and 68 , to the discharge header 62 .
  • first and second bypass paths 72 and 76 are provided at selected bent portions of the first and second tubes 66 and 68 , respectively, it should be understood that the present invention is not limited to the embodiment, and a plurality of bypass paths may be provided at a plurality of locations of the first and second tubes 66 and 68 .
  • the opening/closing valves 74 and 78 are 3-way valves installed between the selected bent portions of the first and second tubes 66 and 68 and the first and second bypass paths 72 and 76 .
  • the first and second bypass paths 72 and 76 are opened when it is necessary to reduce the flow rate of the refrigerant in accordance with a low cooling load, whereas are closed when the flow rate of the refrigerant is appropriate for a desired cooling load.
  • solenoid valves may be installed at the first and second bypass paths 72 and 76 , respectively, to open or close the bypass paths 72 and 76 .
  • the air conditioner of the present invention When the air conditioner of the present invention operates in cooling mode, first, the high-temperature and high-pressure refrigerant, compressed in the compressor 50 , is introduced into the outdoor heat exchanger 52 that serves as a condenser. Thereby, the refrigerant emits heat to the surroundings.
  • the refrigerant having passed through the outdoor heat exchanger 52 , expands into a low-temperature and low-pressure state while passing through the expansion member 56 . After that, the low-temperature and low-pressure refrigerant is introduced into the indoor heat exchanger 54 .
  • the refrigerant is divided by way of the suction header 60 , to be introduced into the first and second tubes 66 and 68 . Thereby, the refrigerant is heat exchanged with indoor air while passing through the first and second tubes 66 and 68 . Then, after being discharged from the discharge header 62 , the refrigerant is again circulated into the compressor 50 .
  • the refrigerant absorbs heat from indoor air while passing through the indoor heat exchanger 54 , thereby cooling a room.
  • the first and second 3-way valves 74 and 78 operate to open the first and second bypass paths 72 and 76 .
  • first and second bypass paths 72 and 76 are opened, the refrigerant, passing through the first and second tubes 66 and 68 of the indoor heat exchanger 54 , is bypassed into the first and second bypass paths 72 and 76 through the first and second 3-way valves 74 and 78 .
  • the cooling temperature of a room can be regulated with a high cooling load sensitivity.
  • the path switching unit 70 may be provided at the outdoor heat exchanger 52 to switch the flow path of the refrigerant passing through the outdoor heat exchanger 52 based on a heating load, for enabling a control of heating capacity.
  • the compressor 50 may be a variable capacity compressor.
  • the variable capacity compressor has several advantages. For example, the size of the refrigerant path inside the heat exchanger as well as the consumption of electricity required to drive the compressor can be reduced. Also, more sensitive response to a cooling load is possible, and therefore, an enhancement in cooling efficiency can be achieved.
  • a heat exchanger for use in an air conditioner according to the present invention has the following advantageous effects.
  • a path switching unit is provided in the heat exchanger at a tube that forms a refrigerant path.
  • the path switching unit is used to switch the flow path of a refrigerant passing through the tube in accordance with a cooling or heating load, thereby regulating the flow rate of the refrigerant.
  • the use of the path switching unit has the effect of achieving an effective control of cooling or heating capacity thereof based on an external load.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
US11/302,386 2004-12-15 2005-12-14 Heat exchanger and air conditioner using the same Abandoned US20060150667A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2004-106351 2004-12-15
KR1020040106351A KR100688168B1 (ko) 2004-12-15 2004-12-15 공기조화기의 열교환기

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US20060150667A1 true US20060150667A1 (en) 2006-07-13

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US (1) US20060150667A1 (ko)
JP (1) JP2006170608A (ko)
KR (1) KR100688168B1 (ko)
CN (1) CN100371658C (ko)
CA (1) CA2529867A1 (ko)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090113929A1 (en) * 2006-04-07 2009-05-07 Hamworthy Gas Systems As Method and apparatus for pre-heating lng boil-off gas to ambient temperature prior to compression in a reliquefaction system
US20100044020A1 (en) * 2007-04-20 2010-02-25 Nobuyuki Kojima Hydrogen gas-cooling device
US20100205989A1 (en) * 2007-04-24 2010-08-19 Hunter Manufacturing Co. Environmental control unit for harsh conditions
US9243826B2 (en) 2012-01-20 2016-01-26 Panasonic Intellectual Property Management Co., Ltd. Refrigeration cycle using a refrigerant having negative saturated vapor pressure with condensation path backflow control and refrigeration cycle using a refrigerant having negative saturated vapor pressure with evaporation path load bypass
US20160341497A1 (en) * 2014-02-17 2016-11-24 Mitsubishi Hitachi Power Systems, Ltd. Heat exchanger
US10048025B2 (en) 2013-01-25 2018-08-14 Trane International Inc. Capacity modulating an expansion device of a HVAC system
US20210333052A1 (en) * 2020-04-28 2021-10-28 Hamilton Sundstrand Corporation Crossflow/counterflow subfreezing plate fin heat exchanger
US11512901B2 (en) * 2020-09-25 2022-11-29 Rheem Manufacturing Company Adjustable capacity heat exchanger

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2833082A4 (en) 2012-03-29 2016-01-06 Mitsubishi Electric Corp AIR CONDITIONING
DE102012222620A1 (de) * 2012-12-10 2014-06-12 Bayerische Motoren Werke Aktiengesellschaft Gaskühleinrichtung für optimierten Winterbetrieb
KR101770643B1 (ko) 2015-12-10 2017-08-23 엘지전자 주식회사 실외 열교환기 및 이를 포함하는 공기조화기
CN109539614B (zh) * 2018-11-09 2019-10-18 珠海格力电器股份有限公司 一种空调系统及其能量调节方法
CN111426103A (zh) * 2020-02-28 2020-07-17 青岛海尔空调电子有限公司 换热装置、空调器及其控制方法

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US4168030A (en) * 1976-10-22 1979-09-18 Timmerman Robert W Waste heat utilization system
US4209062A (en) * 1978-02-10 1980-06-24 Karmazin Products Corporation Heat exchanger construction

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090113929A1 (en) * 2006-04-07 2009-05-07 Hamworthy Gas Systems As Method and apparatus for pre-heating lng boil-off gas to ambient temperature prior to compression in a reliquefaction system
US20100044020A1 (en) * 2007-04-20 2010-02-25 Nobuyuki Kojima Hydrogen gas-cooling device
US20100205989A1 (en) * 2007-04-24 2010-08-19 Hunter Manufacturing Co. Environmental control unit for harsh conditions
US9243826B2 (en) 2012-01-20 2016-01-26 Panasonic Intellectual Property Management Co., Ltd. Refrigeration cycle using a refrigerant having negative saturated vapor pressure with condensation path backflow control and refrigeration cycle using a refrigerant having negative saturated vapor pressure with evaporation path load bypass
US10048025B2 (en) 2013-01-25 2018-08-14 Trane International Inc. Capacity modulating an expansion device of a HVAC system
US10746482B2 (en) * 2013-01-25 2020-08-18 Trane International Inc. Capacity modulating an expansion device of a HVAC system
US20160341497A1 (en) * 2014-02-17 2016-11-24 Mitsubishi Hitachi Power Systems, Ltd. Heat exchanger
US20210333052A1 (en) * 2020-04-28 2021-10-28 Hamilton Sundstrand Corporation Crossflow/counterflow subfreezing plate fin heat exchanger
US11859918B2 (en) * 2020-04-28 2024-01-02 Hamilton Sundstrand Corporation Crossflow/counterflow subfreezing plate fin heat exchanger
US11512901B2 (en) * 2020-09-25 2022-11-29 Rheem Manufacturing Company Adjustable capacity heat exchanger

Also Published As

Publication number Publication date
KR100688168B1 (ko) 2007-03-02
CN100371658C (zh) 2008-02-27
CA2529867A1 (en) 2006-06-15
CN1789865A (zh) 2006-06-21
JP2006170608A (ja) 2006-06-29
KR20060067543A (ko) 2006-06-20

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AS Assignment

Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, WON HEE;HYUN, SEUNG YOUP;SIM, JAE HOON;AND OTHERS;REEL/FRAME:017359/0643

Effective date: 20060110

STCB Information on status: application discontinuation

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