US20050257538A1 - Apparatus and method for controlling air-conditioner - Google Patents
Apparatus and method for controlling air-conditioner Download PDFInfo
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- US20050257538A1 US20050257538A1 US11/032,054 US3205405A US2005257538A1 US 20050257538 A1 US20050257538 A1 US 20050257538A1 US 3205405 A US3205405 A US 3205405A US 2005257538 A1 US2005257538 A1 US 2005257538A1
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- outdoor
- outdoor fan
- voltage
- control signal
- fan
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- 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
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- 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
- F24F2110/12—Temperature of the outside air
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- 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
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- 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
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
-
- 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
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
-
- 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
-
- 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
- F25B2700/2106—Temperatures of fresh outdoor air
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/34—Microprocessors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to an air-conditioner and, more particularly, to an apparatus and method for controlling an air-conditioner.
- an air-conditioner especially, a unitary air-conditioner, which is employed in factories, offices, hotels or homes, is a sort of a central cooling and heating system which applies cold blast or hot blast to each room through a duct installed in a building.
- the unitary air-conditioner independently supplies cold blast or hot blast to a zone (e.g., a room) required to be cooled or heated through a zone controller installed between ducts positioned in the building.
- a zone e.g., a room
- FIGS. 1 and 2 A conventional unitary air-conditioner will now be described with reference to FIGS. 1 and 2 .
- FIGS. 1 and 2 are schematic views showing the construction of a unitary air-conditioner.
- the conventional unitary air-conditioner includes one outdoor unit 1 fixedly installed outside a building (i.e., a 2-story house (Z 2 )); an indoor unit 2 connected with the outdoor unit 1 through a refrigerant pipe, fixedly installed in a basement or a wall of the building and supplying cold blast or hot blast into the building; an outlet duct 4 connected to an inlet port and an outlet port, and separately installed in the wall of each floor of the building; and zone controllers 5 A- 5 D installed between the inlet duct 3 and the outlet duct 4 and discriminating introduced air and exhausted air delivered through the inlet duct 3 and the outlet duct 4 .
- the outdoor unit 1 includes: a compressor 1 A for compressing a refrigerant gas; a first heat exchanger 1 B connected with the compressor 1 A through a refrigerant pipe, condensing refrigerant gas when the unitary air-conditioner is in a cooling mode, and absorbing latent heat when the unitary air-conditioner is in a heating mode; an expansion valve 1 C for reducing a pressure of the refrigerant gas or expanding the refrigerant gas; and an outdoor fan (not shown) for supplying external air to the first heat exchanger 1 B to heighten heat exchange performance of the first heat exchanger 1 B.
- the indoor unit 2 includes: a second heat exchanger 2 A connected with the first heat exchanger 1 B by the expansion valve 1 C; and an indoor fan (not shown) positioned at the second heat exchanger 2 A and inducing cold blast or hot blast to the inlet duct 3 .
- the inlet duct 3 and the outlet duct 4 are connected to the inlet port and the outlet port of the indoor unit 2 and installed at a corresponding zone (e.g., at the first floor (Z 1 ) or the second floor (Z 2 ).
- the inlet duct 3 and the outlet duct 4 include a discharge passage 3 A for supplying cold blast or hot blast to a corresponding zone and a suction opening 4 A for sucking indoor air to circulate indoor air, respectively.
- the zone controllers 5 A ⁇ 5 D are valves installed at the inlet duct 3 and the outlet duct 4 installed at the zones Z 1 and Z 2 in order to supply cold blast or hot blast to the zones Z 1 and Z 2 .
- the zone controllers 5 A ⁇ 5 D are electrically connected with a controller (not shown) of the unitary air-conditioner. The controller detects a temperature or humidity of the corresponding zones, compares the detected temperature or humidity value with a pre-set value, and controls cold blast or hot blast according to the comparison result.
- the conventional unitary air-conditioner controls the indoor unit 2 and the outdoor unit 1 according to a control signal outputted from a thermostat installed in the room.
- the conventional unitary air-conditioner controls the indoor unit 2 and the outdoor unit 1 in a minimum operation mode or a maximum operation mode based on a first control signal (Y 1 ) for operating the air-conditioner in the minimum operation mode or the second control signal (Y 2 ) for operating the air-conditioner in the maximum operation mode according to a room temperature.
- the first control signal (Y 1 ) rotates the indoor fan and the outdoor fan at a low speed and operates only one compressor.
- the first control signal (Y 1 ) rotates the indoor fan and the outdoor fan at a high speed and operates two compressors simultaneously.
- the unitary air-conditioner controls to turn on/turn off only one of two compressors according to the first control signal or controls to turn on/turn off the two compressors simultaneously according to the second control signal.
- the indoor fan is rotated at a low speed according to the first control signal and rotated at a high speed according to the second control signal.
- the unitary air-conditioner controls the outdoor fan and compressors based only on the control signal detected by a temperature controller positioned in the room, a load coping capability deteriorates relatively.
- an object of the present invention is to provide an apparatus and method for controlling an air-conditioner capable of enhancing load coping capability by controlling compressing capacity, a rotation speed of an outdoor fan and a rotation speed of an indoor fan of an air-conditioner in multistage. based on control signals for controlling an outdoor temperature and an indoor temperature.
- an apparatus for controlling an air-conditioner for generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner for controlling the air-conditioner in a maximum operation mode based on a room temperature and a desired temperature previously set by a user, and controlling an indoor fan and an outdoor fan and compressing capacity of compressors of the air-conditioner in multistage based on the first or second control signal and the outdoor temperature.
- an apparatus for controlling a unitary air-conditioner including: a thermostat installed in a room, detecting a room temperature, generating a first control signal for operating the air-conditioner in a minimum operation mode or a second control signal for operating the air-conditioner in a maximum operation mode based on the detected room temperature and a desired temperature previously set by a user, and outputting the first or the second control signal; an outdoor temperature detector installed at an outdoor unit and detecting an outdoor temperature; and a controller, of an outdoor unit, for controlling a small compressing capacity compressor and/or high compressing capacity compressor of the air-conditioner based on the first or second control signal and the detected outdoor temperature, and controlling a rotation speed of an outdoor fan of the air-conditioner in multistage, wherein the thermostat rotates an indoor fan of the air-conditioner at the same rotation speed as the rotation speed of the outdoor fan.
- a method for controlling an air-conditioner including: detecting a room temperature; generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner in a maximum operation mode based on the room temperature and a desired temperature previously set by a user; and controlling an indoor fan, an outdoor fan and compressing capacity of compressors based on the first or second control signal and the outdoor temperature.
- FIGS. 1 and 2 are a schematic view showing the construction of a unitary air-conditioner in accordance with a conventional art
- FIG. 3 is a block diagram showing the construction of a unitary air-conditioner in accordance with a preferred embodiment of the present invention
- FIG. 4 is a flow chart of a method for controlling the unitary air-conditioner in accordance with the preferred embodiment of the present invention.
- FIG. 3 is a block diagram showing the construction of a unitary air-conditioner in accordance with a preferred embodiment of the present invention.
- a unitary air-conditioner in accordance with the present invention includes: a controlling unit 100 for generating a control signal for controlling the unitary air-conditioner; an indoor fan 200 rotated in multistage according to the control signal; an outdoor fan 300 rotated in multistage according to the control signal; and compressors 400 for controlling compressing capacity according to the control signal.
- the controlling unit 100 of the unitary air-conditioner includes: a room temperature detector 10 installed in a room and detecting a room temperature; an outdoor temperature detector installed in an outdoor unit and detecting an outdoor temperature; a controller 20 of an indoor unit for generating a first control signal Y 1 for operating the air-conditioner in a minimum operation mode or a second control signal Y 2 for operating the air-conditioner in a maximum operation mode based on the detected room temperature and a desired temperature previously set by a user, and outputting the first and second control signals Y 1 and Y 2 ; and a controller 40 of the outdoor unit for generating a third control signal for controlling compressing capacity of the compressors 400 and a rotation speed of the outdoor fan 300 in multistage based on the first or the second control signal Y 1 or Y 2 and the detected outdoor temperature and outputting the generated third control signal to the compressors 400 , the outdoor fan 300 and the controller 20 of the indoor unit.
- the controller 20 of the indoor unit controls a rotation speed of the indoor fan 200 according to the third control
- the first and second control signals Y 1 and Y 2 are generated by using a thermostat, instead of the room temperature detector 10 and the controller 20 of the indoor unit.
- FIG. 4 is a flow chart of a method for controlling the unitary air-conditioner in accordance with the preferred embodiment of the present invention.
- the room temperature detector 10 installed in a room detects a room temperature and applies the detected room temperature to the controller 20 of the indoor unit.
- the outdoor temperature detector 30 detects an outdoor temperature and applies the detected outdoor temperature information to the controller 40 of the outdoor unit (step S 1 ).
- the controller 20 of the indoor unit generates the first control signal Y 1 for operating the air-conditioner in the minimum operation mode or the second control signal Y 2 for operating the air-conditioner in the maximum operation mode based on the detected room temperature and the pre-set desired temperature, and applies the first or the second control signal Y 1 or Y 2 to the controller 40 of the outdoor unit (step S 2 ).
- the controller 40 of the outdoor unit generates a compressing capacity control signal for controlling compressing capacity of the compressors 400 in multistage and a speed control signal for controlling a rotation speed of the outdoor fan 300 and the indoor fan 200 in multistage based on the first or second control signal Y 1 or Y 2 and the outdoor temperature information.
- the controller 40 of the outdoor unit outputs the compressing capacity control signal to the compressors 400 and the speed control signal to the outdoor fan 300 and the indoor fan 200 (steps S 3 ⁇ S 5 ).
- FIG. 5 is a table showing an operation condition table for controlling a rotation speed of an outdoor fan and compressing capacity of compressors based on a room temperature, first and second control signals generated according to a pre-set reference temperature and an outdoor temperature.
- the controller 40 of the outdoor unit turns on only the small compressing capacity compressor (having the compressing capacitor of 40%) and applies a voltage for rotating the outdoor fan 300 at a middle speed to the outdoor fan 300 simultaneously.
- the controller 40 of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the middle speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on only the high compressing capacitor compressor (having the 60% of compressing capacity) and, at the same time, applies a voltage for rotating the outdoor fan 300 in the middle speed to the outdoor fan 300 .
- the controller 40 applies the same voltage as the voltage for rotating the outdoor fan 300 at the middle speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on only the high compressing capacity compressor (having the 60% of compressing capacitor) and, at the same time, applies a voltage for rotating the outdoor fan 300 at a high speed to the outdoor fan 300 .
- the controller 40 of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the high speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on only the high compressing capacity compressor (having the 60% of compressing capacity) and at the same time applies the voltage for rotating the outdoor fan 300 at the middle speed to the outdoor fan 300 .
- the controller 40 of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the middle speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on only the high compressing capacitor compressor (having 60% of compressing capacitor) and, at the same time, applies a voltage for rotating the outdoor fan 300 at a high speed to the outdoor fan 300 .
- the controller 40 of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the high speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on the high compressing capacity compressor and the small compressing capacity compressor simultaneously, and at the same time, applies a voltage for rotating the outdoor fan 300 at the high speed to the outdoor fan 300 .
- the controller 40 of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the high speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on the high compressing capacity compressor and the small compressing capacitor compressor simultaneously, and at the same time, applies a voltage for rotating the outdoor fan 300 at a maximum high speed to the outdoor fan 300 .
- the controller 40 of the outdoor unit applies the same voltage as the voltage for rotating the outdoor fan 300 at the maximum high speed to the indoor fan 200 .
- the controller 40 of the outdoor unit turns on the high compressing capacitor compressor and the small compressing capacitor compressor for a second predetermined time (i.e., 10 ⁇ 20 minutes) alternately, in order to prevent damage of the compressor due to an overload.
- the present invention has discovered through several times of trial and error and experimentation the fact that the load coping capability can be enhanced by controlling the compressing capacity, the outdoor fan and the indoor fan according to the operation conditions as shown in FIG. 5 .
- the apparatus and method for controlling the air-conditioner in accordance with the present invention has the following advantages.
- the load coping capability can be enhanced.
Abstract
An apparatus for controlling an air-conditioner for generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner for controlling the air-conditioner in a maximum operation mode based on a room temperature and a desired temperature previously set by a user, and controlling an indoor fan and an outdoor fan and compressing capacity of compressors of the air-conditioner in multistage based on the first or second control signal and the outdoor temperature. By controlling compressing capacity of the air-conditioner, a rotation speed of an outdoor fan and an indoor fan in multistage based on an outdoor temperature and control signals for controlling a room temperature, a load coping capability can be enhanced.
Description
- 1. Field of the Invention
- The present invention relates to an air-conditioner and, more particularly, to an apparatus and method for controlling an air-conditioner.
- 2. Description of the Conventional Art
- In general, an air-conditioner, especially, a unitary air-conditioner, which is employed in factories, offices, hotels or homes, is a sort of a central cooling and heating system which applies cold blast or hot blast to each room through a duct installed in a building.
- The unitary air-conditioner independently supplies cold blast or hot blast to a zone (e.g., a room) required to be cooled or heated through a zone controller installed between ducts positioned in the building.
- A conventional unitary air-conditioner will now be described with reference to
FIGS. 1 and 2 . -
FIGS. 1 and 2 are schematic views showing the construction of a unitary air-conditioner. - With reference to
FIG. 1 , the conventional unitary air-conditioner includes oneoutdoor unit 1 fixedly installed outside a building (i.e., a 2-story house (Z2)); anindoor unit 2 connected with theoutdoor unit 1 through a refrigerant pipe, fixedly installed in a basement or a wall of the building and supplying cold blast or hot blast into the building; anoutlet duct 4 connected to an inlet port and an outlet port, and separately installed in the wall of each floor of the building; andzone controllers 5A-5D installed between theinlet duct 3 and theoutlet duct 4 and discriminating introduced air and exhausted air delivered through theinlet duct 3 and theoutlet duct 4. - With reference to
FIG. 2 , theoutdoor unit 1 includes: acompressor 1A for compressing a refrigerant gas; afirst heat exchanger 1B connected with thecompressor 1A through a refrigerant pipe, condensing refrigerant gas when the unitary air-conditioner is in a cooling mode, and absorbing latent heat when the unitary air-conditioner is in a heating mode; anexpansion valve 1C for reducing a pressure of the refrigerant gas or expanding the refrigerant gas; and an outdoor fan (not shown) for supplying external air to thefirst heat exchanger 1B to heighten heat exchange performance of thefirst heat exchanger 1B. - The
indoor unit 2 includes: asecond heat exchanger 2A connected with thefirst heat exchanger 1B by theexpansion valve 1C; and an indoor fan (not shown) positioned at thesecond heat exchanger 2A and inducing cold blast or hot blast to theinlet duct 3. - The
inlet duct 3 and theoutlet duct 4 are connected to the inlet port and the outlet port of theindoor unit 2 and installed at a corresponding zone (e.g., at the first floor (Z1) or the second floor (Z2). Theinlet duct 3 and theoutlet duct 4 include adischarge passage 3A for supplying cold blast or hot blast to a corresponding zone and a suction opening 4A for sucking indoor air to circulate indoor air, respectively. - The
zone controllers 5A˜5D are valves installed at theinlet duct 3 and theoutlet duct 4 installed at the zones Z1 and Z2 in order to supply cold blast or hot blast to the zones Z1 and Z2. Namely, thezone controllers 5A˜5D are electrically connected with a controller (not shown) of the unitary air-conditioner. The controller detects a temperature or humidity of the corresponding zones, compares the detected temperature or humidity value with a pre-set value, and controls cold blast or hot blast according to the comparison result. - The conventional unitary air-conditioner controls the
indoor unit 2 and theoutdoor unit 1 according to a control signal outputted from a thermostat installed in the room. Namely, the conventional unitary air-conditioner controls theindoor unit 2 and theoutdoor unit 1 in a minimum operation mode or a maximum operation mode based on a first control signal (Y1) for operating the air-conditioner in the minimum operation mode or the second control signal (Y2) for operating the air-conditioner in the maximum operation mode according to a room temperature. Herein, when the air-conditioner is in the cooling mode, if a current room temperature is lower than a room temperature which has been previously set by a user, the first control signal (Y1) rotates the indoor fan and the outdoor fan at a low speed and operates only one compressor. When the air-conditioner is in the cooling mode, if the current room temperature is higher than the pre-set room temperature, the first control signal (Y1) rotates the indoor fan and the outdoor fan at a high speed and operates two compressors simultaneously. - For example, the unitary air-conditioner controls to turn on/turn off only one of two compressors according to the first control signal or controls to turn on/turn off the two compressors simultaneously according to the second control signal. In this case, the indoor fan is rotated at a low speed according to the first control signal and rotated at a high speed according to the second control signal.
- Thus, since the unitary air-conditioner controls the outdoor fan and compressors based only on the control signal detected by a temperature controller positioned in the room, a load coping capability deteriorates relatively.
- A U.S. Pat. No. 6,519,957 issued on Feb. 18, 2003 also discloses an air-conditioner.
- Therefore, an object of the present invention is to provide an apparatus and method for controlling an air-conditioner capable of enhancing load coping capability by controlling compressing capacity, a rotation speed of an outdoor fan and a rotation speed of an indoor fan of an air-conditioner in multistage. based on control signals for controlling an outdoor temperature and an indoor temperature.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an apparatus for controlling an air-conditioner for generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner for controlling the air-conditioner in a maximum operation mode based on a room temperature and a desired temperature previously set by a user, and controlling an indoor fan and an outdoor fan and compressing capacity of compressors of the air-conditioner in multistage based on the first or second control signal and the outdoor temperature.
- To achieve the above object, there is also provided an apparatus for controlling a unitary air-conditioner including: a thermostat installed in a room, detecting a room temperature, generating a first control signal for operating the air-conditioner in a minimum operation mode or a second control signal for operating the air-conditioner in a maximum operation mode based on the detected room temperature and a desired temperature previously set by a user, and outputting the first or the second control signal; an outdoor temperature detector installed at an outdoor unit and detecting an outdoor temperature; and a controller, of an outdoor unit, for controlling a small compressing capacity compressor and/or high compressing capacity compressor of the air-conditioner based on the first or second control signal and the detected outdoor temperature, and controlling a rotation speed of an outdoor fan of the air-conditioner in multistage, wherein the thermostat rotates an indoor fan of the air-conditioner at the same rotation speed as the rotation speed of the outdoor fan.
- To achieve the above object, there is also provided a method for controlling an air-conditioner including: detecting a room temperature; generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner in a maximum operation mode based on the room temperature and a desired temperature previously set by a user; and controlling an indoor fan, an outdoor fan and compressing capacity of compressors based on the first or second control signal and the outdoor temperature.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
- In the drawings:
-
FIGS. 1 and 2 are a schematic view showing the construction of a unitary air-conditioner in accordance with a conventional art; -
FIG. 3 is a block diagram showing the construction of a unitary air-conditioner in accordance with a preferred embodiment of the present invention; -
FIG. 4 is a flow chart of a method for controlling the unitary air-conditioner in accordance with the preferred embodiment of the present invention; and -
FIG. 5 is a table showing an operation condition table for controlling a rotation speed of an outdoor fan and compressing capacity of compressors based on first and second control signals generated according to a room temperature and a pre-set reference temperature and an outdoor temperature. - An apparatus and method for controlling an air-conditioner capable of enhancing a load coping capability by generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner for controlling the air-conditioner in a maximum operation mode based on a room temperature and a desired temperature previously set by a user, and controlling an indoor fan and an outdoor fan and compressing capacity of compressors of the air-conditioner in multistage based on the first or second control signal and the outdoor temperature, in accordance with a preferred embodiment of the present invention will now be described with reference to FIGS. 3 to 5.
-
FIG. 3 is a block diagram showing the construction of a unitary air-conditioner in accordance with a preferred embodiment of the present invention. - As shown in
FIG. 3 , a unitary air-conditioner in accordance with the present invention includes: a controllingunit 100 for generating a control signal for controlling the unitary air-conditioner; anindoor fan 200 rotated in multistage according to the control signal; anoutdoor fan 300 rotated in multistage according to the control signal; andcompressors 400 for controlling compressing capacity according to the control signal. - The controlling
unit 100 of the unitary air-conditioner includes: aroom temperature detector 10 installed in a room and detecting a room temperature; an outdoor temperature detector installed in an outdoor unit and detecting an outdoor temperature; acontroller 20 of an indoor unit for generating a first control signal Y1 for operating the air-conditioner in a minimum operation mode or a second control signal Y2 for operating the air-conditioner in a maximum operation mode based on the detected room temperature and a desired temperature previously set by a user, and outputting the first and second control signals Y1 and Y2; and acontroller 40 of the outdoor unit for generating a third control signal for controlling compressing capacity of thecompressors 400 and a rotation speed of theoutdoor fan 300 in multistage based on the first or the second control signal Y1 or Y2 and the detected outdoor temperature and outputting the generated third control signal to thecompressors 400, theoutdoor fan 300 and thecontroller 20 of the indoor unit. Herein, thecontroller 20 of the indoor unit controls a rotation speed of theindoor fan 200 according to the third control signal. - Preferably, the first and second control signals Y1 and Y2 are generated by using a thermostat, instead of the
room temperature detector 10 and thecontroller 20 of the indoor unit. - Preferably, the
compressors 400 include a compressor with small compressing capacity and a compressor with high compressing capacity. Assuming that a total compressing capacity of the large compressing capacity compressor and the high compressing capacity compressor is 100%, it is preferred that the compressing capacity of the small compressing capacity compressor is set as 40% and the compressing capacity of the high compressing capacity compressor is set as 60%. - The operation of the apparatus for controlling the unitary air-conditioner in accordance with the present invention will now be described with reference to
FIG. 4 . -
FIG. 4 is a flow chart of a method for controlling the unitary air-conditioner in accordance with the preferred embodiment of the present invention. - First, the
room temperature detector 10 installed in a room detects a room temperature and applies the detected room temperature to thecontroller 20 of the indoor unit. At this time, theoutdoor temperature detector 30 detects an outdoor temperature and applies the detected outdoor temperature information to thecontroller 40 of the outdoor unit (step S1). - The
controller 20 of the indoor unit generates the first control signal Y1 for operating the air-conditioner in the minimum operation mode or the second control signal Y2 for operating the air-conditioner in the maximum operation mode based on the detected room temperature and the pre-set desired temperature, and applies the first or the second control signal Y1 or Y2 to thecontroller 40 of the outdoor unit (step S2). - The
controller 40 of the outdoor unit generates a compressing capacity control signal for controlling compressing capacity of thecompressors 400 in multistage and a speed control signal for controlling a rotation speed of theoutdoor fan 300 and theindoor fan 200 in multistage based on the first or second control signal Y1 or Y2 and the outdoor temperature information. Thecontroller 40 of the outdoor unit outputs the compressing capacity control signal to thecompressors 400 and the speed control signal to theoutdoor fan 300 and the indoor fan 200 (steps S3˜S5). - Operation conditions for controlling the compressing capacity of the
compressors 400 and the rotation speed of theoutdoor fan 300 and theindoor fan 200 based on the first or second control signal Y1 or Y2 and the outdoor temperature information will be described in detail with reference toFIG. 5 as follows. -
FIG. 5 is a table showing an operation condition table for controlling a rotation speed of an outdoor fan and compressing capacity of compressors based on a room temperature, first and second control signals generated according to a pre-set reference temperature and an outdoor temperature. - First, when the first control signal Y1 and room temperature information (i.e., 26°˜35°) are received, the
controller 40 of the outdoor unit turns on only the small compressing capacity compressor (having the compressing capacitor of 40%) and applies a voltage for rotating theoutdoor fan 300 at a middle speed to theoutdoor fan 300 simultaneously. When the voltage for rotating theoutdoor fan 300 at the middle speed is applied to theoutdoor fan 300, preferably, thecontroller 40 of the indoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the middle speed to theindoor fan 200. - When the first control signal Y1 and room temperature information (i.e., 36°˜45°) are received, the
controller 40 of the outdoor unit turns on only the high compressing capacitor compressor (having the 60% of compressing capacity) and, at the same time, applies a voltage for rotating theoutdoor fan 300 in the middle speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 applies the same voltage as the voltage for rotating theoutdoor fan 300 at the middle speed to theindoor fan 200. - When the first control signal Y1 and room temperature information (higher than 45°) are received, the
controller 40 of the outdoor unit turns on only the high compressing capacity compressor (having the 60% of compressing capacitor) and, at the same time, applies a voltage for rotating theoutdoor fan 300 at a high speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 of the indoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the high speed to theindoor fan 200. - When the second control signal Y2 and room temperature information (lower than 26°) are received, the
controller 40 of the outdoor unit turns on only the high compressing capacity compressor (having the 60% of compressing capacity) and at the same time applies the voltage for rotating theoutdoor fan 300 at the middle speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 of the indoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the middle speed to theindoor fan 200. - When the second control signal Y2 and room temperature information (26°˜30°) are received, the
controller 40 of the outdoor unit turns on only the high compressing capacitor compressor (having 60% of compressing capacitor) and, at the same time, applies a voltage for rotating theoutdoor fan 300 at a high speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 of the indoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the high speed to theindoor fan 200. - When the second control signal Y2 and room temperature information (31°˜40°) are received, the
controller 40 of the outdoor unit turns on the high compressing capacity compressor and the small compressing capacity compressor simultaneously, and at the same time, applies a voltage for rotating theoutdoor fan 300 at the high speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 of the indoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the high speed to theindoor fan 200. - When the second control signal Y2 and room temperature information (higher than 40°) are received, the
controller 40 of the outdoor unit turns on the high compressing capacity compressor and the small compressing capacitor compressor simultaneously, and at the same time, applies a voltage for rotating theoutdoor fan 300 at a maximum high speed to theoutdoor fan 300. In this case, preferably, thecontroller 40 of the outdoor unit applies the same voltage as the voltage for rotating theoutdoor fan 300 at the maximum high speed to theindoor fan 200. - When an outdoor temperature is 41° or higher and the small compressing capacity compressor and the high compressing capacitor compressor are both being turned on for a first predetermined time (i.e., 30˜40 minutes), the
controller 40 of the outdoor unit turns on the high compressing capacitor compressor and the small compressing capacitor compressor for a second predetermined time (i.e., 10˜20 minutes) alternately, in order to prevent damage of the compressor due to an overload. - The present invention has discovered through several times of trial and error and experimentation the fact that the load coping capability can be enhanced by controlling the compressing capacity, the outdoor fan and the indoor fan according to the operation conditions as shown in
FIG. 5 . - As so far described, the apparatus and method for controlling the air-conditioner in accordance with the present invention has the following advantages.
- That is, for example, by controlling the compressing capacity and the rotation speed of the outdoor fan and the indoor fan based on the first or second control signal Y1 or Y2 generated based on the room temperature and the desired temperature previously set by the user and the outdoor temperature in multistage, the load coping capability can be enhanced.
- As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (14)
1. An apparatus for controlling an air-conditioner for generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner in a maximum operation mode based on a room temperature and a desired temperature previously set by a user, and controlling an indoor fan and an outdoor fan and compressing capacity of compressors of the air-conditioner in multistage based on the first or second control signal and an outdoor temperature.
2. The apparatus of claim 1 , comprising:
a room temperature detector installed in a room and detecting the room temperature;
an outdoor temperature detector installed at an outdoor unit and detecting the outdoor temperature;
a controller of an indoor unit for generating the first control signal for operating the air-conditioner in the minimum operation mode or the second control signal for operating the air-conditioner in the maximum operation mode based on the detected room temperature and the desired temperature previously set by the user, and outputting the first and second control signals; and
a controller of an outdoor unit for generating a third control signal for controlling the compressing capacity of the compressors of the air-conditioner and a rotation speed of the outdoor fan in multistage based on the first and second control signals and the detected outdoor temperature, and outputting the third control signal to the compressors, the outdoor fan, and the controller of the indoor unit,
wherein the controller of the indoor unit controls the rotation speed of the indoor fan in multistage according to the third control signal.
3. The apparatus of claim 2 , wherein the compressors and a small compressing capacitor compressor and a high compressing capacity compressor.
4. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the first control signal and the room temperature information, it turns on only the small compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at a low speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the low speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the low speed to the indoor fan,
wherein the room temperature information is lower than 26°.
5. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the first control signal and the room temperature information, it turns on only the small compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at a middle speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the middle speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the middle speed to the indoor fan,
wherein the room temperature information is 26°˜35°.
6. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the first control signal and the room temperature information, it turns on only the high compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at a middle speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the middle speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the middle speed to the indoor fan,
wherein the room temperature information is 36°˜45°.
7. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the first control signal and the room temperature information, it turns on only the high compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at a high speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the high speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the high speed to the indoor fan,
wherein the room temperature information is greater than 45°.
8. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the second control signal and the room temperature information, it turns on only the high compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at the middle speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the middle speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the middle speed to the indoor fan,
wherein the room temperature information is smaller than 26°.
9. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the second control signal and the room temperature information, it turns on only the high compressing capacity compressor and, at the same time, applies a voltage for rotating the outdoor fan at the high speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the high speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the high speed to the indoor fan,
wherein the room temperature information is 260°˜30°.
10. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the second control signal and the room temperature information, it turns on both the high compressing capacity compressor and the small compressing capacitor compressor simultaneously and, at the same time, applies a voltage for rotating the outdoor fan at the high speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the high speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the high speed to the indoor fan,
wherein the room temperature information is 31°˜40°.
11. The apparatus of claim 3 , wherein when the controller of the outdoor unit receives the second control signal and the room temperature information, it turns on both the high compressing capacity compressor and the small compressing capacitor compressor simultaneously and, at the same time, applies a voltage for rotating the outdoor fan at a maximum high speed to the outdoor fan, and
when the voltage for rotating the outdoor fan at the maximum high speed is applied to the outdoor fan, the controller of the indoor unit applies the same voltage as the voltage for rotating the outdoor fan at the maximum high speed to the indoor fan,
wherein the room temperature information is greater than 40°.
12. The apparatus of claim 3 , wherein in order to prevent damage of the compressors owing to an overload, when both the small compressing capacity compressor and the high compressing capacitor compressor are being turned on simultaneously for a first predetermined time, the controller of the outdoor unit turns on the high compressing capacity compressor and the small compressing capacitor compressor alternately for a second predetermined time.
13. An apparatus for controlling a unitary air-conditioner comprising:
a thermostat installed in a room, detecting a room temperature, generating a first control signal for operating the air-conditioner in a minimum operation mode or a second control signal for operating the air-conditioner in a maximum operation mode based on the detected room temperature and a desired temperature previously set by a user, and outputting the first or the second control signal;
an outdoor temperature detector installed at an outdoor unit and detecting an outdoor temperature; and
a controller, of an outdoor unit, for controlling a small compressing capacity compressor and/or high compressing capacity compressor of the air-conditioner based on the first or second control signal and the detected outdoor temperature, and controlling a rotation speed of an outdoor fan of the air-conditioner in multistage,
wherein the thermostat rotates an indoor fan of the air-conditioner at the same rotation speed as the rotation speed of the outdoor fan.
14. A method for controlling an air-conditioner comprising:
detecting a room temperature;
generating a first control signal for controlling an air-conditioner in a minimum operation mode or a second control signal for controlling the air-conditioner in a maximum operation mode based on the room temperature and a desired temperature previously set by a user; and
controlling an indoor fan, an outdoor fan and compressing capacity of compressors based on the first or second control signal and the outdoor temperature.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020040036521A KR100539764B1 (en) | 2004-05-21 | 2004-05-21 | Unitary air cinditioner and his control method |
KR36521/2004 | 2004-05-21 |
Publications (1)
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US20050257538A1 true US20050257538A1 (en) | 2005-11-24 |
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US11/032,054 Abandoned US20050257538A1 (en) | 2004-05-21 | 2005-01-11 | Apparatus and method for controlling air-conditioner |
Country Status (4)
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US (1) | US20050257538A1 (en) |
EP (1) | EP1605214A3 (en) |
KR (1) | KR100539764B1 (en) |
CN (1) | CN1699865A (en) |
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US10830517B2 (en) | 2015-04-27 | 2020-11-10 | Emerson Climate Technologies, Inc. | System and method of controlling a variable-capacity compressor |
US11105546B2 (en) | 2015-04-27 | 2021-08-31 | Emerson Climate Technologies, Inc. | System and method of controlling a variable-capacity compressor |
US11092371B2 (en) | 2016-03-16 | 2021-08-17 | Emerson Climate Technologies, Inc. | System and method of controlling a variable-capacity compressor and a variable-capacity fan using a two-stage thermostat |
US10760814B2 (en) | 2016-05-27 | 2020-09-01 | Emerson Climate Technologies, Inc. | Variable-capacity compressor controller with two-wire configuration |
FR3077191A1 (en) * | 2018-01-29 | 2019-08-02 | Y2I Finances | EXHIBITION CABINET FOR PRESENTATION OF PRODUCTS |
Also Published As
Publication number | Publication date |
---|---|
KR20050111280A (en) | 2005-11-24 |
EP1605214A2 (en) | 2005-12-14 |
KR100539764B1 (en) | 2006-01-12 |
CN1699865A (en) | 2005-11-23 |
EP1605214A3 (en) | 2006-12-27 |
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Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HWANG, YOON-JEI;HYUN, SEUNG-YOUP;LEE, WON-HEE;AND OTHERS;REEL/FRAME:016184/0547 Effective date: 20041224 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |