EP1626230A2 - Betriebssteuerungsverfahren einer einheitlichen Klimaanlage - Google Patents

Betriebssteuerungsverfahren einer einheitlichen Klimaanlage Download PDF

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Publication number
EP1626230A2
EP1626230A2 EP05101612A EP05101612A EP1626230A2 EP 1626230 A2 EP1626230 A2 EP 1626230A2 EP 05101612 A EP05101612 A EP 05101612A EP 05101612 A EP05101612 A EP 05101612A EP 1626230 A2 EP1626230 A2 EP 1626230A2
Authority
EP
European Patent Office
Prior art keywords
compressor
compressors
operating
thermostat
cold temperature
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.)
Granted
Application number
EP05101612A
Other languages
English (en)
French (fr)
Other versions
EP1626230B1 (de
EP1626230A3 (de
Inventor
Won-Hee Lee
Yoon-Jei Hwang
Seung-Youp Daerim 2-cha Woosung Apt.102-1303 Hyun
Jae-Hoon Sim
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 EP1626230A2 publication Critical patent/EP1626230A2/de
Publication of EP1626230A3 publication Critical patent/EP1626230A3/de
Application granted granted Critical
Publication of EP1626230B1 publication Critical patent/EP1626230B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F25B2400/0751—Details of compressors or related parts with parallel compressors the compressors having different capacities
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment

Definitions

  • the present invention relates to a unitary air conditioner, and more particularly, to an operation control method for a unitary air conditioner which improves the load response capabilities of compressors and improves energy efficiency and amenity.
  • a unitary air conditioning system is a kind of centralized cooling and heating system which creates a hot air or hot air in one place using a cooling and heating system and supplies it to an individual space through a duct.
  • Fig. 1 is a schematic view illustrating a conventional unitary air conditioner of heat pump type using a cooling cycle.
  • Fig. 2 is a system view of the conventional unitary air conditioner of Fig. 1.
  • the conventional unitary air conditioner comprises one outdoor unit 1 fixedly disposed outside a building, a cold and hot air unit 2 connected to a first exchange 1b of the outdoor unit 1 and fixedly disposed in the basement, outbuilding, etc. of the basement, an air supply duct 3 and an exhaust duct 4 connected by a refrigerant pipe to an air supplying opening and an exhaust opening, respectively, of the cold and hot air unit 2 and separately buried in the wall body of each floor of the building and region controllers 5a to 5d disposed in the middle of the air supply duct 3 and exhaust duct 4 and discriminating air supply and air exhaustion to each floor.
  • the outdoor unit 1 comprises one or more compressor 1a disposed inside a case and compressing a refrigerant gas, a firs heat exchange 1b connected to the compressor 1 a by a refrigerant pipe and condensing the refrigerant gas (in a cooling operation) or absorbing a latent heat (in a heating operation), an inflating device 1 c reducing and inflating the pressure of the refrigerant gas, and an outdoor fan (not shown) supplying an external air to the first heat exchange and increasing the heat exchange performance of the heat exchange 1b.
  • the cold and hot air unit 2 comprises a second heat exchange 2a disposed inside a case and connecting one end thereof to the first heat exchange 1b and the other end to the expansion device 1 c simultaneously and a supply ventilating fan (not shown) guiding a hot air or hot air to the air supply duct 3.
  • the case of the cold and hot air unit generally has an air channel of 'U' shape formed therein so as to receive the second heat exchange 2a and the supply ventilating fan (not shown), the air supply duct 3 and the exhaust duct 4 being connected respectively to the air supply side and exhaust side of the air channel.
  • the air supply duct 3 and the exhaust duct 4 are connected to the air supplying opening and exhaust opening of the cold and hot air unit 2 and separately buried in corresponding regions Z1 and Z2.
  • the air supply duct and 3 and the exhaust duct 4 are provided with a discharge opening 3a supplying cold air or hot air to the corresponding regions and a suction opening 4a sucking cold air or hot air to circulate indoor air.
  • the region controllers 5a to 5d are a kind of valves which are disposed in the middle of the air supply duct 3 and of the exhaust duct buried in the corresponding regions Z1 and Z2 so as to supply cold air or hot air to the corresponding regions separately. They are connected to a control section (not shown) so that they can be automatically turned on/off by detecting the temperature, humidity, etc. of the corresponding regions and comparing the detected values with set values, or they are configured to be operated manually.
  • Fig. 3 is an exemplified view illustrating the operating mode of a compressor being determined through a thermostat in the conventional unitary air conditioner.
  • the unitary air conditioner conventionally commercialized operates the compressor in the minimum operation mode or in the maximum operation mode by controlling the indoor unit or outdoor unit by a low cold temperature or high cold temperature operation control signal provided from the thermostat.
  • the unitary air conditioner in case the unitary air conditioner is a single-stage model, it conducts only the operation (such as the maximum operation) set according to an operation control signal provided from the thermostat. Further, in case the unitary air conditioner is a two-stage model, when a high cold temperature operation control signal is provided from the thermostat, both indoor unit and outdoor unit conduct their operation in the minimum operation mode.
  • the conventional unitary air conditioner uses two compressors, it operates only either the compressor in the minimum operation mode or in the maximum operation mode. Therefore, the conventional unitary air conditioner has the defect of decreasing the load response capabilities of the compressors and of increasing of power consumption by operating the compressors only in the two-stage operation mode.
  • an object of the present invention is to provide an operation control method for a unitary air conditioner which is able to improve the load response capabilities of compressors by operating the compressors in the three-stage operation mode upon driving one or more compressors.
  • an operation control method for a unitary air conditioner with one or more compressors comprises the steps of: operating the compressors for a predetermined time by a user's selecting a low cold temperature cooling mode or a high cold temperature cooling mode; and operating the compressors in either the minimum operation mode or the intermediate operation mode according to a low cold temperature signal generated from a thermostat by the selection of the low cold temperature cooling mode.
  • an operation control method for a unitary air conditioner with one or more compressors comprises the steps of: a user's selecting a low cold temperature cooling mode or a high cold temperature cooling mode; when a high cold temperature signal is inputted from a thermostat by selecting the high cold temperature cooling mode, operating the compressors in the maximum operation mode; and when a low cold temperature signal is inputted from the thermostat by selecting the low cold temperature cooling mode, checking the previous operation status based on the size of the load at the indoor side and operating the compressors in either the minimum operation mode or the intermediate operation mode.
  • a system for control the operation of a unitary air conditioner in accordance with the present invention may comprise two compressors with a different capacity, a heat exchange, a fan, a fan motor, an accumulator, etc.
  • a three-stage operation is conducted using two compressors with a different capacity while using a conventionally used two-stage thermostat as it is.
  • the unitary air conditioner is operated in the maximum operation mode by operating both of the two compressors, or is operated in the intermediate operation mode (60% operation) by operating only the compressor with a large capacity out of the two compressors, or is operated in the minimum operation mode (40% operation) by operating only the compressor with a smaller capacity out of the two compressors.
  • Fig. 4 is a flow chart of one embodiment of an operation control method for a unitary air conditioner in accordance with the present invention.
  • the operation control method for a unitary air conditioner comprises the steps of: operating one or two of the compressors for a predetermined time by a user's selecting a low cold temperature cooling mode or a high cold temperature cooling mode (S41); detecting a room temperature and comparing the room temperature with a desired temperature (S42 and S43); judging the size of a load at the indoor side based on the result of comparison between the room temperature and the desired temperature (S44); when a low cold temperature signal Y1 is inputted from a thermostat by selecting the low cold temperature cooling mode, checking the previous operation status based on the size of the load at the indoor side and operating the compressor in either the minimum operation mode or the intermediate operation mode (S46 and S47); when a high cold temperature signal Y2 is inputted from the thermostat by the user's selecting the cooling mode, operating both compressors in the maximum operation mode (S45).
  • the size of the load at the indoor side is judged to thus determine the operation of the compressors in the minimum or intermediate operation mode, and the size of the load at the indoor side means a gap between the room temperature and the desired temperature. Further, the previous operation status is determined based on a gap between the room temperature and the desired temperature, an outdoor temperature or the like.
  • the minimum operation mode allows to operate only the compressor with a smaller capacity out of the two compressors
  • the intermediate operation mode allows to operate only the compressor with a larger capacity out of the two compressors.
  • Figs. 5A and 5B are flow charts of another embodiment of an operation control method for a unitary air conditioner in accordance with the present invention.
  • the unitary air conditioner upon an initial start-up, the unitary air conditioner generates a low cold temperature signal from a thermostat according to a user's selection of a cooling mode, and operates a larger capacity compressor (e.g., 60% operation) according to the low cold temperature signal (S51 to S53).
  • a larger capacity compressor e.g. 60% operation
  • a room temperature and a desired temperature are compared again, and then when the thermostat generates a compressor on/off signal Y1 for generating a low cold temperature signal based on the result of the comparison, the larger capacity compressor is operated (e.g., 60% operation) (S57 to S59).
  • the smaller capacity compressor is operated (S63 to S65).
  • the thermostat when the thermostat generates a stop signal after generating a low cold temperature signal Y1 and then generates a low cold temperature signal Y1 again, it is judged that the load is eliminated to some extent and thus only the smaller capacity compressor for executing the minimum operation is operated.
  • the smaller capacity compressor is generated upon generating a low cold temperature signal Y1 (S66 and S67). That is, when a predetermined time elapses since the smaller capacity compressor has been operated, a room temperature and a desired temperature are compared, and then when the thermostat generates a compressor on/off control signal for stopping the operation of the compressor based on the result of the comparison, the operation of the smaller capacity compressor is stopped. Then, after a predetermined time, when the thermostat generates a compressor on/off signal for generating a low cold temperature signal Y1, the smaller capacity compressor is operated.
  • the thermostat may generate a high cold temperature signal at an early stage.
  • the algorithm of this embodiment of the present invention which generates a high cold temperature signal at an early stage will be described below.
  • Figs. 6A and 6B are flow charts of yet another embodiment of an operation control method for a unitary air conditioner in accordance with the present invention.
  • the thermostat when the cooling mode is selected by a user, the thermostat generates a high cold temperature signal, and operates smaller capacity and larger capacity compressors according to the high cold temperature signal (S81 to S83).
  • Fig. 7 is a graph illustrating the comparison of changes in indoor air temperature between the present invention and the conventional art.
  • the unitary air conditioner using a three-stage algorithm in accordance with the present invention has an overally smaller gradient of indoor temperature than the conventional art. This makes the user feel pleasant with the improvement of the compressors' load response capabilities.
  • Fig. 8 is a comparison chart illustrating load response capabilities and power consumption with respect to the present invention and the conventional art.
  • the unitary air conditioner using the three-stage algorithm in accordance with the present invention increases the energy efficiency with a reduction of power consumption and improves the amenity with an improvement of response capabilities to a load.
  • the present invention has the effect of improving the load response capabilities of the compressors by operating the compressors in the three-stage operation mode upon driving one or more compressors. Further, the present invention has the effect of improving energy efficiency and amenity with a reduction of power consumption since the operation mode of the compressors is determined by judging the previous operation status according to the size of the load at the indoor side upon a low cold temperature operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
EP05101612A 2004-08-14 2005-03-02 Betriebssteuerungsverfahren einer einheitlichen Klimaanlage Expired - Fee Related EP1626230B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040064106A KR100619733B1 (ko) 2004-08-14 2004-08-14 유니터리 공기조화기의 운전제어방법

Publications (3)

Publication Number Publication Date
EP1626230A2 true EP1626230A2 (de) 2006-02-15
EP1626230A3 EP1626230A3 (de) 2007-01-24
EP1626230B1 EP1626230B1 (de) 2011-08-10

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ID=36076842

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Application Number Title Priority Date Filing Date
EP05101612A Expired - Fee Related EP1626230B1 (de) 2004-08-14 2005-03-02 Betriebssteuerungsverfahren einer einheitlichen Klimaanlage

Country Status (4)

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US (1) US20060032252A1 (de)
EP (1) EP1626230B1 (de)
KR (1) KR100619733B1 (de)
CN (1) CN1734384B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100661919B1 (ko) * 2004-08-14 2006-12-28 엘지전자 주식회사 유니터리 공기조화기의 운전제어방법
KR100749058B1 (ko) * 2006-07-20 2007-08-13 삼성전자주식회사 용량 가변형 에어컨 및 그 운전제어방법
JP4626714B2 (ja) * 2008-08-22 2011-02-09 ダイキン工業株式会社 冷凍装置
JP5624713B2 (ja) * 2008-09-22 2014-11-12 パナソニックヘルスケア株式会社 冷凍装置
JP5287831B2 (ja) * 2010-10-29 2013-09-11 株式会社デンソー 二段昇圧式冷凍サイクル
US20140069131A1 (en) * 2012-09-13 2014-03-13 Mitsubishi Electric Corporation Air conditioning system
US9298197B2 (en) 2013-04-19 2016-03-29 Google Inc. Automated adjustment of an HVAC schedule for resource conservation
US9869485B2 (en) * 2015-02-27 2018-01-16 Mitsubishi Electric Corporation System and method for controlling an HVAC unit based on thermostat signals
US10551105B2 (en) * 2015-07-31 2020-02-04 Trane International Inc. Multi-stage control for electromechanical heating, ventilation, and air conditioning (HVAC) unit
CN105115117B (zh) * 2015-08-21 2017-12-08 广东美的暖通设备有限公司 空调机组及其低温制冷控制方法和低温制冷控制装置
US11022357B2 (en) * 2015-10-05 2021-06-01 Carrier Corporation System and method of operating a variable speed compressor with a two-stage controller
CN110094841B (zh) * 2019-04-15 2021-11-02 青岛海尔空调电子有限公司 用于空调的电子膨胀阀控制方法和空调

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543622A2 (de) 1991-11-18 1993-05-26 Sanyo Electric Co., Limited. Klimagerät und Regelvorrichtung hierfür
US20020134094A1 (en) 2001-03-26 2002-09-26 Deok Huh Method for controlling air conditioner having multi-compressor
US20040107709A1 (en) 2002-12-10 2004-06-10 Lg Electronics Inc. Method for operating compressors of air conditioner
US20040118135A1 (en) 2002-12-20 2004-06-24 Lg Electronics, Inc. Air conditioner and method for operating air conditioner in cooling mode

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Publication number Priority date Publication date Assignee Title
US2917904A (en) * 1956-12-17 1959-12-22 William W Davis Control for a room air conditioner
US4633672A (en) * 1985-02-19 1987-01-06 Margaux Controls, Inc. Unequal compressor refrigeration control system
IL116764A (en) * 1996-01-15 2001-01-11 Acclim Line Ltd Central air conditioning system
JP3637786B2 (ja) * 1998-09-17 2005-04-13 株式会社日立製作所 ブライン冷却装置
CN2616840Y (zh) * 2003-04-02 2004-05-19 张沈杰 变容量中央空调

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543622A2 (de) 1991-11-18 1993-05-26 Sanyo Electric Co., Limited. Klimagerät und Regelvorrichtung hierfür
US20020134094A1 (en) 2001-03-26 2002-09-26 Deok Huh Method for controlling air conditioner having multi-compressor
US20040107709A1 (en) 2002-12-10 2004-06-10 Lg Electronics Inc. Method for operating compressors of air conditioner
US20040118135A1 (en) 2002-12-20 2004-06-24 Lg Electronics, Inc. Air conditioner and method for operating air conditioner in cooling mode

Also Published As

Publication number Publication date
KR100619733B1 (ko) 2006-09-08
CN1734384A (zh) 2006-02-15
CN1734384B (zh) 2010-09-29
EP1626230B1 (de) 2011-08-10
EP1626230A3 (de) 2007-01-24
KR20060015381A (ko) 2006-02-17
US20060032252A1 (en) 2006-02-16

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