EP1691146A1 - Conditionneur d'air à unités multiples capable de refroidir et chauffer simultanément - Google Patents

Conditionneur d'air à unités multiples capable de refroidir et chauffer simultanément Download PDF

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Publication number
EP1691146A1
EP1691146A1 EP06002284A EP06002284A EP1691146A1 EP 1691146 A1 EP1691146 A1 EP 1691146A1 EP 06002284 A EP06002284 A EP 06002284A EP 06002284 A EP06002284 A EP 06002284A EP 1691146 A1 EP1691146 A1 EP 1691146A1
Authority
EP
European Patent Office
Prior art keywords
duct
air conditioner
refrigerant
compressor
oil accumulation
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.)
Withdrawn
Application number
EP06002284A
Other languages
German (de)
English (en)
Inventor
Do-Yong Ha
Ho-Jong Jeong
Young-Min Park
Pil-Hyun Yoon
Ki-Baik Kwon
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
Publication of EP1691146A1 publication Critical patent/EP1691146A1/fr
Withdrawn legal-status Critical Current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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H23/00—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms
    • A61H23/006—Percussion or tapping massage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00—Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02—Stretching or bending or torsioning apparatus for exercising
    • A61H1/0218—Drawing-out devices
    • A61H1/0222—Traction tables
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H23/00—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms
    • A61H23/02—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive
    • A61H23/0218—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive with alternating magnetic fields producing a translating or oscillating movement
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/12—Driving means
    • A61H2201/1207—Driving means with electric or magnetic drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2205/00—Devices for specific parts of the body
    • A61H2205/12—Feet
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant

Definitions

  • the present invention relates to a multi-air conditioner capable of simultaneous cooling and heating, and particularly, to a multi-air conditioner capable of simultaneous cooling and heating configured to prevent damage to a compressor due to a shortage of oil by preventing oil accumulation within a duct which may occur during full cooling operation.
  • an air conditioner is a device for cooling or heating an indoor space such as a living space, a restaurant or an office.
  • a multi-air conditioner is formed such that a plurality of indoor units are connected to one outdoor unit and each of the indoor units is installed to each room.
  • the multi-air conditioner is operated in one of cooling and heating operation modes and performs air-conditioning of the room.
  • Figure 1 is a construction view of a general multi-air conditioner capable of simultaneous cooling and heating.
  • the general multi-air conditioner capable of simultaneous cooling and heating, includes an outdoor unit 50 having therein a compressor 1 and an outdoor heat exchanger 2, a plurality of indoor units (C), each having therein an electronic expansion valve 61 and an indoor heat exchanger 62, and a distributor 60 provided between the outdoor unit 50 and the indoor unit 70 and distributing to the plurality of indoor units, a refrigerant introduced from the outdoor unit.
  • an outdoor unit 50 having therein a compressor 1 and an outdoor heat exchanger 2
  • a plurality of indoor units (C) each having therein an electronic expansion valve 61 and an indoor heat exchanger 62
  • a distributor 60 provided between the outdoor unit 50 and the indoor unit 70 and distributing to the plurality of indoor units, a refrigerant introduced from the outdoor unit.
  • the outdoor unit 50 includes a compressor 1, an outdoor heat exchanger 2, a duct unit having three ducts 3, 4 and 5 connected to the compressor 1, for guiding a refrigerant to the distributor 60 or guiding a refrigerant of the distributor 60 to the compressor 1, and a switching unit 6 switching a flow of a refrigerant so as to allow a refrigerant of a specific pressure and a specific phase to flow to each duct.
  • the duct unit includes a first duct 3 connecting the distributor 60 with a discharge end of the compressor 1 and having the outdoor heat exchanger 2 in the middle, a second duct 4 connecting the distributor 60 with a front end 3a of the first duct (a discharge side of the compressor) and guiding only a high pressure gaseous refrigerant, and a third duct 5 connecting the distributor 60 to a suction end of the compressor 1.
  • the distributor includes a high pressure liquefied refrigerant connection duct 21 connected to a high pressure liquefied section 3c of the first duct 3 and guiding a high pressure liquefied refrigerant, a high pressure liquefied refrigerant divergence duct 22 diverged from the high pressure liquefied refrigerant connection duct 21 and guiding a high pressure liquefied refrigerant, a high pressure gaseous refrigerant connection duct 23 connected to the second duct 4 and guiding a high pressure gaseous refrigerant, a high pressure gaseous refrigerant divergence duct 24.
  • Undescribed reference numeral 9 is an accumulator.
  • a multi-air conditioner capable of simultaneous cooling heating having such a structure performs the following operation at the time of full cooling operation related to the present invention.
  • a high-pressure gaseous refrigerant discharged from the compressor 1 flows along a front end side 3a of the first duct and is introduced to a rear end side 3b of the first duct by switching of the switching unit 6. Then, the refrigerant is introduced to the outdoor heat exchanger 2, is condensed while passing through the outdoor heat exchanger 2, and is changed into a high temperature high pressure liquefied refrigerant.
  • the high temperature high pressure liquefied refrigerant coming out of the outdoor heat exchanger 2 passes through a check valve 7a and is introduced to the high pressure liquefied refrigerant connection duct 21 of the distributor 60 along a high pressure liquefied refrigerant section 3c of the first duct 1.
  • the high pressure liquefied refrigerant introduced to the high pressure liquefied refrigerant connection duct 21 is divided to each high pressure liquefied refrigerant divergence duct 22 and is expanded while passing through an electronic expansion valve 61 of each indoor side. Then, the refrigerant is evaporated while passing through each indoor heat exchanger 62, thereby cooling each room.
  • a portion of the high pressure liquefied refrigerant discharged from the compressor 1 is introduced to a second duct 4 which is not used at the time full cooling operation.
  • oil circulates together with the refrigerant.
  • the full cooling operation is made for a long time, oil mixed with the refrigerant is accumulated within the second duct 4, and consequently, a shortage of refrigerant and oil occurs, which causes degradation in cooling performance and damage to a component such as a compressor 1.
  • refrigerant and oil introduced into the second duct 4 are introduced to a bypass duct 27a because of blockage of a two way valve 31 of a high pressure gaseous refrigerant divergence duct 24 side, then, passes through a blocking valve 27b and a capillary duct 27c, being converted into a low pressure gaseous refrigerant, and is introduced to the low pressure gaseous refrigerant connection duct 26 of the distributor 60.
  • an object of the present invention is to provide a multi-air conditioner capable of simultaneous cooling and heating, configured to improve reliability of a compressor by preventing oil accumulation within a duct and damage to a compressor which may occurs at the time of full cooling operation.
  • a multi-air conditioner capable of simultaneous cooling and heating, comprising: a first duct connected to a discharge side of a compressor, through which a refrigerant discharged from the compressor passes at the time of cooling operation; a second duct diverged from the first duct, through which a refrigerant discharged from the compressor passes at the time of heating operation; and an oil accumulation preventing portion formed at a certain section of the second duct to have a height difference, for preventing oil, which is introduced to the second duct from the compressor together with a refrigerant, from being accumulated within the second duct.
  • Figure 2 is a construction view of a multi-air conditioner capable of simultaneous cooling and heating according to the present invention
  • Figure 3 is a perspective view of a main part of Figure 2
  • Figure 4 is a sectional view taken along line IV-IV of Figure 3.
  • the multi-air conditioner capable of simultaneous cooling and heating includes a first duct 3 connected to a discharge side of a compressor 1, through which a refrigerant discharged from the compressor 1 passes at the time of cooling operation, a second duct 4 diverged from the first duct 3, through which a refrigerant discharged from the compressor 1 passes at the time of heating operation, and an oil accumulation preventing portion 8 formed in a certain section of the second duct 4 to have a height difference for the purpose of preventing oil, which is introduced to the second duct 4 together with a refrigerant, from being accumulated within the second duct 4.
  • the second duct 4 is installed such that its one side communicates with a front end 3a of the first duct (a discharge side of the compressor) and its other side communicates with a distributor 60.
  • the portion communicating with the front end 3a of the first duct becomes an inlet side of the second duct 4.
  • the oil accumulation preventing portion 8 is placed in the vicinity of an inlet portion of the second duct.
  • a section from the inlet portion 10 of the second duct to a starting point 11 of the oil accumulation preventing portion has the same height at both ends so that oil flow is prevented by the oil accumulation preventing portion 8 and return of the oil accumulated at the front end side of the second duct 4 can be facilitated.
  • the section may be inclined at a predetermined angle ( ⁇ ) such that its height is lowered toward the inlet portion 10 of the second duct.
  • the section from the inlet portion 10 of the second duct to the starting point 11 of the oil accumulation preventing portion is formed in a straight line in order to reduce an oil return path and a cost for a duct.
  • the oil accumulation preventing portion 8 includes the highest spot 12 which is the highest point in the section forming the oil accumulation preventing portion 8, and a downward section continued from the highest spot. This is because the most preferred embodiment should be able to prevent the accumulation of the oil within the second duct 4 without installing a special returning device and thusly to block the flow of the oil by gravity.
  • the height (H) between the starting point 11 of the oil accumulation preventing portion and the highest spot 12 of the oil accumulation preventing portion is the same as or greater than a diameter of the second duct 4.
  • the oil accumulation preventing portion 8 preferably includes at least one curved section.
  • the oil accumulation preventing portion 8 has a reverse trap.
  • Figure 5 shows another embodiment of the oil accumulation preventing portion in accordance with the present invention.
  • a method of forming a path of a certain section between the inlet portion 10 of the second duct and the starting point 11 of the oil accumulation preventing portion as described above is possible, but a method of forming a starting point 13 of the oil accumulation preventing portion corresponding to the inlet portion of the second duct is also possible.
  • the distributor 60 further includes a liquefaction preventing unit 27 between the second duct 4 and the low pressure refrigerant connection duct 26 in order to prevent a high pressure gaseous refrigerant accumulated in the second duct 4 from being liquefied. This is because if the high pressure gaseous refrigerant is liquefied and stays in the second duct 4, a shortage of refrigerant may occur in the compressor.
  • the liquefaction preventing unit 27 includes a bypass duct 27a connecting the low pressure gaseous refrigerant connection duct 26 with the second duct 4, a blocking valve 27b provided on the bypass duct 27a and opening and closing the bypass duct 27a so as to allow the refrigerant accumulated in the second duct to flow to the low pressure gaseous refrigerant connection duct 26, and a capillary duct 27c decompressing and expanding a high pressure refrigerant accumulated in the second duct 4 and converting the refrigerant into a low pressure gaseous refrigerant.
  • the remaining portion of the high pressure gaseous refrigerant is introduced to the second duct 4.
  • the refrigerant introduced to the second duct and oil mixed therewith flow along a flow path of a certain section, and the refrigerant keep flowing toward the distributor 60 as illustrated as a dotted arrow in Figure 4.
  • the oil accumulation preventing portion 8 of a reverse trap structure having a predetermined height difference (H) once entering the oil accumulation preventing portion 8 of a reverse trap structure having a predetermined height difference (H), the oil cannot flow upwardly by itself due to gravity and thusly can no more flow.
  • the oil whose flow has been blocked is accumulated in a section of an upstream area within the second duct 4.
  • the oil returns to the compressor 1 by way of the inlet portion 10 of the second duct and the front end side 3a of the first duct.
  • the section between the inlet portion 10 of the second duct and the starting point 11 of the oil accumulation preventing portion is inclined at a predetermined angle ( ⁇ ) such that its height is lowered toward a discharge side of the compressor 1, which facilitates the return of oil.
  • the return path can be shortened by forming a section between the inlet portion 10 of the second duct and the starting point 11 of the oil accumulation preventing portion as a straight line.
  • a refrigerant introduced into the second duct 4 radiates heat, is condensed, and is accumulated therein. If the accumulation occurs, the blocking valve 27b is opened, and the refrigerant is decompressed and expanded while passing through the capillary duct 27c, and is converted into a low pressure gaseous refrigerant. Then, the refrigerant is introduced to the low pressure gaseous refrigerant connection duct 26 of the distributor 60.
  • the high pressure liquefied refrigerant introduced to the high pressure liquefied refrigerant connection duct 21 of the distributor is divided into each high pressure liquefied refrigerant divergence duct 22 and is expanded while passing through an electronic expansion valve 61 of each room. Then, the refrigerant is evaporated while passing through the indoor heat exchanger 72 and cools each room.
  • the evaporated refrigerant is introduce to each low pressure gaseous refrigerant divergence duct 26 by blockage of a two way valve 31 of each high pressure gaseous refrigerant divergence duct 24, then, passes through the low pressure gaseous refrigerant connection duct 26 and the low pressure gaseous refrigerant duct 3d, and then is introduced to the compressor 1 together with the low pressure gaseous refrigerant having entered the low pressure gaseous refrigerant connection duct 26.
  • a portion of the refrigerant is drawn into a closing duct 6c for pressurization along an auxiliary connection duct 6b by a four way valve 7a which has already been switched.
  • an oil accumulation preventing portion 8 having a height difference is formed at a certain section of the second duct 4, so that oil accumulation within a duct which may occurs at the time of full cooling operation and a shortage of oil can be prevented. Accordingly, damage to the compressor 1 is prevented, and the reliability of the compressor can be improved.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Pain & Pain Management (AREA)
  • Epidemiology (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP06002284A 2005-02-15 2006-02-03 Conditionneur d'air à unités multiples capable de refroidir et chauffer simultanément Withdrawn EP1691146A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050012464A KR101172445B1 (ko) 2005-02-15 2005-02-15 냉난방 동시형 멀티 에어컨

Publications (1)

Publication Number Publication Date
EP1691146A1 true EP1691146A1 (fr) 2006-08-16

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EP06002284A Withdrawn EP1691146A1 (fr) 2005-02-15 2006-02-03 Conditionneur d'air à unités multiples capable de refroidir et chauffer simultanément

Country Status (4)

Country Link
US (1) US20060179867A1 (fr)
EP (1) EP1691146A1 (fr)
KR (1) KR101172445B1 (fr)
CN (1) CN1821665A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2174008A4 (fr) * 2007-06-22 2015-06-17 Emerson Climate Technologies Procédé et système de compresseurs en tandem

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KR100803128B1 (ko) * 2006-12-22 2008-02-14 엘지전자 주식회사 공기조화 시스템
JPWO2011099067A1 (ja) * 2010-02-10 2013-06-13 三菱電機株式会社 冷凍サイクル装置
CN104006584B (zh) * 2013-02-26 2017-03-08 广东美的暖通设备有限公司 三管制空调及其冷媒流向切换装置
US10891291B2 (en) 2016-10-31 2021-01-12 Oracle International Corporation Facilitating operations on pluggable databases using separate logical timestamp services
CN106907882B (zh) * 2017-02-23 2022-10-11 广州市粤联水产制冷工程有限公司 制冷系统
CN112129004B (zh) * 2019-06-24 2022-12-09 广东美芝精密制造有限公司 压缩机和换热系统
JP7393624B2 (ja) * 2019-09-24 2023-12-07 ダイキン工業株式会社 冷媒流路切換装置及び空気調和システム

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EP1437557A1 (fr) * 2003-01-13 2004-07-14 LG Electronics Inc. Appareil multiple de climatisation avec dispositif de dégivrage

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Publication number Priority date Publication date Assignee Title
JPH06307724A (ja) * 1993-04-21 1994-11-01 Matsushita Refrig Co Ltd 冷暖混在多室形空気調和機
EP1437557A1 (fr) * 2003-01-13 2004-07-14 LG Electronics Inc. Appareil multiple de climatisation avec dispositif de dégivrage

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2174008A4 (fr) * 2007-06-22 2015-06-17 Emerson Climate Technologies Procédé et système de compresseurs en tandem

Also Published As

Publication number Publication date
US20060179867A1 (en) 2006-08-17
KR101172445B1 (ko) 2012-08-07
CN1821665A (zh) 2006-08-23
KR20060091536A (ko) 2006-08-21

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