US20060037354A1 - Indoor unit of air conditioner - Google Patents

Indoor unit of air conditioner Download PDF

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Publication number
US20060037354A1
US20060037354A1 US11/033,159 US3315905A US2006037354A1 US 20060037354 A1 US20060037354 A1 US 20060037354A1 US 3315905 A US3315905 A US 3315905A US 2006037354 A1 US2006037354 A1 US 2006037354A1
Authority
US
United States
Prior art keywords
refrigerant
heat exchanger
slabs
indoor unit
air
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
US11/033,159
Other languages
English (en)
Inventor
Eun-Jun Cho
Yun-Ho Ryu
Yoon-Jei Hwang
Ji-Young Jang
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: CHO, EUN-JUN, HWANG, YOON-JEI, JANG, JI-YOUNG, RYU, YUN-HO
Publication of US20060037354A1 publication Critical patent/US20060037354A1/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
    • 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
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • 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
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle

Definitions

  • the present invention relates to an indoor unit of an air conditioner, and particularly, to an indoor unit of an air conditioner capable of improving efficiency of heat exchange between refrigerant and air.
  • an air conditioner is an apparatus for maintaining a pleasant room temperature by using latent heat of vaporization of refrigerant, which is circulated in a refrigerating cycle of a compressor, a heat exchanger, an expansion valve and an evaporator.
  • the air conditioner performs cooling operation on a room through a series of processes that refrigerant is compressed by the compressor at up to saturation pressure, the compressed refrigerant is liquefied by the heat exchanger, the liquefied refrigerant is introduced to the evaporator in a state of being decompressed and expanded by throttling of the expansion valve, and the introduced refrigerant is heat-exchanged with ambient air of the evaporator to be evaporated in the evaporator.
  • Such an air conditioner is divided into an integral type air conditioner and a split type air conditioner according to whether an indoor unit and an outdoor unit are coupled together, and the split type air conditioner is divided into a wall mounted type and a floor standing type according to its installation type.
  • the indoor unit of the conventional air conditioner includes a casing 110 having an air suction part 112 for sucking the air and an air discharge part 114 positioned at an upper portion, for discharging the air; a blower fan 120 installed inside the casing 110 , for sucking and discharging the air; and a indoor heat exchanger 130 installed inside the casing 110 , for heat-exchanging the air flowing inside the casing 110 with a refrigerant.
  • the indoor heat exchanger 130 is an A-coil heat exchanger type having a pair of slabs 131 and 132 .
  • a plurality of tubes 133 through which refrigerant flows are respectively installed in the slabs, and the slabs 131 and 132 are at a predetermined angle as their upper ends of the slabs are coupled together and their lower ends are apart from each other.
  • a refrigerant outlet 137 connected to a refrigerant outlet pipe 135 for discharging refrigerant to an outdoor unit, thus to discharge the refrigerant having passed through the tubes 133 toward the outdoor unit is installed at an upper end of each slab 131 and 132 .
  • thermostatic expansion valve (TXV) 138 for controlling a flow of refrigerant according to a temperature of a refrigerant
  • refrigerant distributor 139 for distributing refrigerant toward each refrigerant inlet 136 are installed at the refrigerant inlet pipe 134 .
  • the blower fan 120 is disposed under the indoor heat exchanger 130 , and an outlet of the blower fan 120 is arranged toward an upper side of the indoor heat exchanger 130 .
  • the refrigerant repetitively undergoes a series of processes that refrigerant compressed by the compressor emits heat to ambient air while passing through an outdoor heat exchanger, to thereby be changed into a high temperature and high pressure liquefied refrigerant, the high temperature and high pressure liquefied refrigerant is decompressed and expanded by being introduced to the TXV 138 through the refrigerant inlet pipe 134 , the refrigerant having passed through the TXV 138 is introduced to the indoor heat exchanger 130 through the refrigerant inlet 136 , is evaporated by absorbing ambient heat, to thereby be a low temperature and low pressure gaseous refrigerant, and then is sucked again to the compressor through the refrigerant outlet 137 and the refrigerant outlet pipe 135 .
  • the blower fan 120 is driven theretogether. According to this, the indoor air is introduced into the casing 110 through the air suction part 112 , is heat-exchanged by coming in contact with the indoor heat exchanger 130 , and is discharged to the outside of the casing 110 through the air discharge part 114 .
  • refrigerant moves in reverse order of the freezing cycle, and the indoor heat exchanger 130 functions as a condenser, so that a room is heated.
  • blower fan 120 is disposed under the indoor heat exchanger 130 , air sent from the blower fan 120 flows from the lower ends of the slabs 131 and 132 toward the upper ends.
  • a passage of the air flowing from the blower fan 120 becomes narrower from a lower side toward an upper side because a distance between the slabs 131 and 132 gets longer from their upper ends toward the lower ends.
  • a flow velocity of air flowing from the blower fan 120 is higher at the upper end sides of the slabs 131 and 132 rather than at their lower end sides of the slabs 131 and 132 .
  • refrigerant passing through the upper ends of the slabs 131 and 132 has undesirably already overheated to some degree by heat-exchange with the air because the refrigerant is introduced to the refrigerant inlets 136 of the lower ends of the slabs 131 and 132 , passes through the tubes 133 , and is discharged to the refrigerant outlets 137 of the upper ends of the slabs 131 and 132 .
  • an object of the present invention is to provide an air conditioner capable of improving efficiency of heat exchange between a refrigerant and air and improving cooling and heating efficiency by installing a refrigerant inlet for introducing refrigerant to an indoor exchanger at a position where a flow velocity of air is higher than a position of a refrigerant outlet.
  • an indoor unit of an air conditioner comprising a blower fan disposed within a casing; and a heat exchanger for heat-exchanging between refrigerant and air flowing by the blower fan , said heat exchanger connected to a refrigerant inlet pipe for introducing refrigerant and a refrigerant outlet pipe for discharging refrigerant, wherein the refrigerant inlet pipe is connected to a side of the heat exchanger, where a flow velocity of the air passing through the heat exchanger is relatively high.
  • FIG. 1 is an exploded perspective view showing an indoor unit of a conventional air conditioner
  • FIG. 2 is a schematic view showing an indoor unit of the conventional air conditioner
  • FIG. 3 is an exploded perspective view showing an indoor unit of an air conditioner in accordance with the present invention.
  • FIGS. 4 and 5 are schematic views showing an indoor unit of the air conditioner in accordance with the present invention.
  • an outdoor unit of an air conditioner in accordance with the present invention includes a casing 10 having an air suction part 12 positioned at a front side of the casing 10 and an air discharge part 14 positioned at an upper side of the casing 10 ; a blower fan 20 installed within the casing 10 , for sucking and discharging air; and an indoor heat exchanger 30 installed inside the casing 10 and heat-exchanging between refrigerant and air flowing by the blower fan 20 and passing through the indoor heat exchanger 30 .
  • the indoor heat exchanger 30 is an A-coil heat exchanger type having a pair of slabs 31 and 32 .
  • a plurality of tubes 33 respectively connected to an outdoor unit, a refrigerant inlet pipe 32 and a refrigerant outlet pipe 35 thus to flow a refrigerant therethrough are respectively installed therein, and the slabs 31 and 32 are arranged to be at a predetermined angle as upper ends of the slabs 31 and 32 are coupled to each other and their lower ends are apart from each other.
  • a flow velocity of the air is higher at the upper ends where the slabs 31 and 32 are coupled together rather than at the lower ends. Therefore, to improve efficiency of heat-exchange between refrigerant passing through the slabs 31 and 32 and air, a refrigerant inlet 36 connected to the refrigerant inlet pipe 34 is installed at each upper end of the slabs 31 and 32 , and a refrigerant outlet 37 connected to the refrigerant outlet pipe 35 is installed at each lower end of the slabs 31 and 32 .
  • thermostatic expansion valve (TXV) 38 for controlling a flow of a refrigerant according to a temperature of refrigerant
  • refrigerant distributor 39 for distributing refrigerant toward each refrigerant inlet 36 are installed at the refrigerant inlet pipe 34 .
  • blower fan 20 is disposed adjacent to a lower side of the indoor heat exchange 30 in comparison with its adjacency to an upper side of the indoor heat exchanger 30 , and an outlet of the blower fan 20 is installed toward the upper side of the indoor heat exchanger 30 .
  • a blower fan 20 is formed by coupling a turbo fan, a kind of a centrifugal fan, to a fan motor (not shown) so as to suck, pressurize and discharge the indoor air.
  • the refrigerant distributor 39 equally distributes refrigerant to each refrigerant inlet 36 , and pipes coupled to the refrigerant distributor 39 preferably have a vertical length of at least about 5 cm or longer.
  • a four way valve connected to the refrigerant inlet pipe 34 and the refrigerant outlet pipe 35 , for converting circulation of refrigerant discharged from the compressor according to a heating cycle or a cooling cycle is installed, so that the indoor unit in accordance with the present invention can carry out not only the cooling operation but also the heating operation.
  • the refrigerant repetitively undergoes a series of processes that refrigerant compressed by driving of the compressor emits heat to ambient air while passing through an outdoor heat exchanger, to thereby be changed into a high temperature high pressure liquefied refrigerant, the high temperature and high pressure liquefied refrigerant is decompressed and expanded by being introduced to the TXV 38 through the refrigerant inlet pipe 34 , the refrigerant having passed through the TXV 38 is introduced to the indoor heat exchanger 30 through the refrigerant inlet 36 , is evaporated by absorbing ambient heat, to thereby be a low temperature and lower pressure gaseous refrigerant, and then is sucked again to the compressor through the refrigerant outlet 37 and the refrigerant outlet pipe 35 .
  • the blower fan 20 is driven theretogether. According to this, the indoor air is introduced into the casing 10 through the air suction part 12 , is heat-exchanged by coming in contact with the indoor heat exchanger 30 , and is discharged to the outside of the casing 10 through the air discharge part 14 .
  • refrigerant moves in reverse order of the freezing cycle, and the indoor heat exchanger 30 functions as a condenser, so that a room can be heated.
  • the blower fan 20 is disposed under the indoor heat exchanger 30 , the air sent from the blower fan 20 moves from the lower ends of the slabs 31 and 32 toward their upper ends.
  • a distance between the slabs 31 and 32 gets longer from their upper ends toward the lower ends. Therefore, a passage of the air flowing from the blower fan 20 gets narrower from a lower side toward an upper side. Accordingly, a flow velocity of the air flowing from the blower fan 20 is higher at the upper ends of the slabs 31 and 32 rather than at the lower ends.
  • the refrigerant inlet pipe 34 is connected to the upper end of the slab 31 and 32 , the refrigerant is introduced to the upper end of the slab 31 and 32 , where a flow velocity of the air is high, and is heat-exchanged with the air while flowing along the tube 33 .
  • the refrigerant outlet pipe 35 is connected to the lower end of the slab 31 and 32 , the refrigerant heat-exchanged while passing through the tube 33 is discharged from the lower end of the slab 31 and 32 , where a flow velocity of the air is low. Accordingly, efficiency of heat exchange between the refrigerant and the air can be remarkably improved at a portion where the flow velocity of the air is high.
  • a refrigerant inlet pipe and a refrigerant outlet pipe are respectively connected to an indoor heat exchanger, so that refrigerant is introduced to a portion where a flow velocity of the air passing the indoor heat exchanger is high and is discharged to a portion where a flow velocity of the air is low. Accordingly, efficiency of the heat exchange between the indoor air and the refrigerant can be improved, and performance of the air conditioner can be improved by improving heating and cooling effect for the air. Also, by reducing the operation time of the air conditioner, power consumption can be reduced.
  • the present invention intends to improve efficiency of heat exchange between refrigerant and air by introducing the refrigerant to a portion where a flow velocity of the air passing a heat exchanger is high and discharging the refrigerant from a portion where the flow velocity of the air is low. Therefore, it should also be understood that the above-described embodiments are not limited by an indoor unit having an A coil type heat exchanger of the foregoing description, but rather can be applied to every indoor unit having a heat exchanger in which a flow velocity of the air is different depending on a portion of the heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
US11/033,159 2004-08-20 2005-01-12 Indoor unit of air conditioner Abandoned US20060037354A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR66058/2004 2004-08-20
KR1020040066058A KR100608682B1 (ko) 2004-08-20 2004-08-20 에어콘의 실내기

Publications (1)

Publication Number Publication Date
US20060037354A1 true US20060037354A1 (en) 2006-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/033,159 Abandoned US20060037354A1 (en) 2004-08-20 2005-01-12 Indoor unit of air conditioner

Country Status (4)

Country Link
US (1) US20060037354A1 (zh)
EP (1) EP1628081B1 (zh)
KR (1) KR100608682B1 (zh)
CN (1) CN100351575C (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008130358A1 (en) * 2007-04-24 2008-10-30 Carrier Corporation Transcritical refrigerant vapor compression system with charge management
US20100115975A1 (en) * 2007-04-24 2010-05-13 Carrier Corporation Refrigerant vapor compression system and method of transcritical operation
US20110023514A1 (en) * 2007-05-14 2011-02-03 Carrier Corporation Refrigerant vapor compression system with flash tank economizer
CN102297480A (zh) * 2010-06-24 2011-12-28 三星电子株式会社 空调的室内单元
US20130091889A1 (en) * 2011-10-14 2013-04-18 Donghwi KIM Outdoor unit for air conditioner
US8561425B2 (en) 2007-04-24 2013-10-22 Carrier Corporation Refrigerant vapor compression system with dual economizer circuits
US20150033776A1 (en) * 2013-08-05 2015-02-05 Trane International Inc. HVAC System Subcooler

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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KR100728350B1 (ko) * 2006-07-27 2007-06-13 주식회사 대우일렉트로닉스 토출방향 가변 장치를 갖는 에어컨
CN102401531A (zh) * 2011-11-16 2012-04-04 湖南凌天科技有限公司 双出风冷风机
KR101713290B1 (ko) 2014-11-27 2017-03-07 신동윤 비닐 하우스 어셈블리
KR20160106276A (ko) 2015-03-02 2016-09-12 김태훈 친환경 비닐하우스 장치
KR20170019859A (ko) 2015-08-13 2017-02-22 김태훈 조립식 온실

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US5332028A (en) * 1993-03-12 1994-07-26 Carrier Corporation Method and apparatus for controlling supplemental electric heat during heat pump defrost

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008130358A1 (en) * 2007-04-24 2008-10-30 Carrier Corporation Transcritical refrigerant vapor compression system with charge management
US20100115975A1 (en) * 2007-04-24 2010-05-13 Carrier Corporation Refrigerant vapor compression system and method of transcritical operation
US20100132399A1 (en) * 2007-04-24 2010-06-03 Carrier Corporation Transcritical refrigerant vapor compression system with charge management
US8424326B2 (en) 2007-04-24 2013-04-23 Carrier Corporation Refrigerant vapor compression system and method of transcritical operation
US8561425B2 (en) 2007-04-24 2013-10-22 Carrier Corporation Refrigerant vapor compression system with dual economizer circuits
US20110023514A1 (en) * 2007-05-14 2011-02-03 Carrier Corporation Refrigerant vapor compression system with flash tank economizer
US8671703B2 (en) 2007-05-14 2014-03-18 Carrier Corporation Refrigerant vapor compression system with flash tank economizer
CN102297480A (zh) * 2010-06-24 2011-12-28 三星电子株式会社 空调的室内单元
US20110314855A1 (en) * 2010-06-24 2011-12-29 Samsung Electronics Co., Ltd. Indoor unit of air conditioner
US20130091889A1 (en) * 2011-10-14 2013-04-18 Donghwi KIM Outdoor unit for air conditioner
US20150033776A1 (en) * 2013-08-05 2015-02-05 Trane International Inc. HVAC System Subcooler
US9328934B2 (en) * 2013-08-05 2016-05-03 Trane International Inc. HVAC system subcooler

Also Published As

Publication number Publication date
EP1628081B1 (en) 2016-04-06
CN1737435A (zh) 2006-02-22
CN100351575C (zh) 2007-11-28
EP1628081A2 (en) 2006-02-22
KR20060017396A (ko) 2006-02-23
KR100608682B1 (ko) 2006-08-08
EP1628081A3 (en) 2008-01-02

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Legal Events

Date Code Title Description
AS Assignment

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

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHO, EUN-JUN;RYU, YUN-HO;HWANG, YOON-JEI;AND OTHERS;REEL/FRAME:016160/0541

Effective date: 20041228

STCB Information on status: application discontinuation

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