WO2010131874A2 - Climatiseur et procédé pour le faire fonctionner - Google Patents

Climatiseur et procédé pour le faire fonctionner Download PDF

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Publication number
WO2010131874A2
WO2010131874A2 PCT/KR2010/002937 KR2010002937W WO2010131874A2 WO 2010131874 A2 WO2010131874 A2 WO 2010131874A2 KR 2010002937 W KR2010002937 W KR 2010002937W WO 2010131874 A2 WO2010131874 A2 WO 2010131874A2
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WO
WIPO (PCT)
Prior art keywords
cold water
chiller
set temperature
temperature
compressor
Prior art date
Application number
PCT/KR2010/002937
Other languages
English (en)
Korean (ko)
Other versions
WO2010131874A3 (fr
Inventor
김홍열
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to EP10775076.2A priority Critical patent/EP2431677A4/fr
Priority to CN201080025167.3A priority patent/CN102460029B/zh
Priority to US13/319,668 priority patent/US20120131935A1/en
Publication of WO2010131874A2 publication Critical patent/WO2010131874A2/fr
Publication of WO2010131874A3 publication Critical patent/WO2010131874A3/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
    • F24F3/0442—Systems in which all treatment is given in the central station, i.e. all-air systems with volume control at a constant 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator

Definitions

  • the present invention relates to an air conditioner and a method of operating the same, and more particularly, to an air conditioner and a method of operating the same, which cools water in a refrigeration cycle, heat exchanges the air with the cooled water, and supplies the same to the room.
  • an air conditioner is a device that cools and heats a room using a refrigeration cycle of a refrigerant including a compressor, a condenser, an expansion device, and an evaporator to create a more comfortable indoor environment for a user.
  • the air conditioner is an evaporator configured to heat exchange the water and the refrigerant, and the water heat-exchanged with the refrigerant is configured to cool the air in a heat exchanger such as a cold water coil.
  • a heat exchanger such as a cold water coil.
  • an object of the present invention is to provide an air conditioner for controlling the compressor by setting the cold water set temperature by the pressure difference of the refrigeration cycle.
  • An air conditioner according to the present invention for solving the above problems includes a compressor, a condenser, an expansion mechanism, and an evaporator, and a water pipe is connected to the evaporator to supply cold water, and the chiller is connected to a plurality of chillers connected in parallel.
  • the chiller in operation among the plurality of chillers may be configured to set a cold water set temperature of a chiller that is a driver according to a differential pressure between a high pressure side and a low pressure side, and to adjust an operating capacity of the compressor according to a set cold water set temperature. If there is a chiller that is equal to or greater than the set pressure during the set time and the chiller is not currently running, the operation command is transmitted to the chiller that is not currently running.
  • Each of the plurality of chillers may include a low pressure sensor configured to sense a suction side pressure of the compressor; A high pressure sensor for sensing the discharge pressure of the compressor; The chiller controller may be configured to set the cold water set temperature according to the differential pressure between the high pressure sensed by the high pressure sensor and the low pressure sensed by the low pressure sensor, and adjust the operating capacity of the compressor according to the set cold water set temperature.
  • the air conditioner includes a common water pipe temperature sensor for measuring a temperature of a common water pipe through which the coolant supplied from the plurality of chillers passes together, and the chiller controller is detected by the common water pipe temperature sensor.
  • the cold water set temperature may be set according to temperature.
  • the air conditioner may further include a communication line connecting the chiller control units of the plurality of chillers to transmit an operation command from one of the plurality of chillers to another.
  • a method of operating an air conditioner according to the present invention includes a compressor, a condenser, an expansion mechanism, and an evaporator, and a water pipe is connected to the evaporator to supply cold water, and the air to drive a plurality of chillers connected in parallel to the water pipe.
  • a method of operating a conditioner comprising: a cold water set temperature setting step of setting a cold water set temperature if the differential pressure between the high pressure and the low pressure of the chiller as the operation is equal to or greater than the set pressure during the set time; A compressor operation capacity adjusting step of adjusting an operation capacity of the compressor according to the cold water setting temperature set in the cold water setting temperature setting step; And if the differential pressure is greater than or equal to the set pressure during the set time and there is a chiller that is not currently running among the plurality of chillers, a driving command transmitting step of transmitting a driving command to the chiller that is not currently running.
  • the cold water set temperature setting step may increase the cold water set temperature if the differential pressure is greater than or equal to the set pressure during the set time.
  • the operation command transmitting step may transmit the stop set temperature of the chiller that is not currently running together with the operation command to the chiller that is not currently running.
  • the cold water outlet temperature of the common water pipe among the water pipes after the operation command transmission step is different from the cold water set temperature, it may be returned to the cold water set temperature setting step.
  • the method may further include a compressor operation capacity readjustment step of adjusting an operation capacity of the compressor according to the cold water setting temperature set in the cold water setting temperature increasing step.
  • the step of stopping the chiller which is the operation may be further included.
  • the method may further include a compressor operation capacity readjustment step of adjusting an operation capacity of the compressor according to the cold water setting temperature set in the cold water setting temperature decreasing step.
  • the present invention is configured as described above by adjusting the operating capacity of the compressor according to the set cold water set temperature, it is possible to efficiently operate according to the load, there is an advantage that can minimize the power consumption.
  • the minimum chiller can be operated at partial load, and when it is difficult to cope with the load with one chiller, another chiller which is currently stopped is additionally operated, so there is an advantage in that it can operate in response to the load with minimal power consumption. .
  • FIG. 1 is a schematic structural diagram of an embodiment of an air conditioner according to the present invention.
  • FIG. 2 is a configuration diagram showing the inside of the air handling unit shown in FIG. 1;
  • FIG. 3 is a configuration diagram showing the inside of the chiller shown in FIG.
  • FIG. 4 is a control block diagram of an embodiment of an air conditioner according to the present invention.
  • FIG. 5 is a flowchart illustrating an embodiment of a method of operating an air conditioner according to the present invention.
  • FIGS. 1 and 3 are schematic configuration diagrams of an embodiment of an air conditioner according to the present invention
  • Figure 2 is a block diagram showing the inside of the air handling unit shown in Figure 1
  • Figure 3 is the inside of the chiller shown in Figure 1
  • 4 is a block diagram of the chiller illustrated in FIGS. 1 and 3.
  • the air conditioner according to the present embodiment includes at least one air handling unit 1, 2, and a plurality of chillers 3, 4, 5. At least one air handling unit 1, 2 and a plurality of chillers 3, 4, 5 are connected by a water pipe 6.
  • the air handling unit (1) (2) is a cold water demand destination where the cold water supplied from the plurality of chillers (3) (4) (5) is used, and the cold water supplied from the plurality of chillers (3) (4) (5).
  • Heat exchangers such as cold water coils to pass through.
  • the air handling unit (1) (2) may be composed of a non-ventilating air conditioning unit that heats indoor air in a heat exchanger and then supplies it to the room, mixes outdoor air and indoor air, and heats the mixed air in the heat exchanger. It is also possible to be configured as a combined air conditioning unit for supplying to the room after supplying, it will be described as consisting of a combined air conditioning unit.
  • the air handling units 1 and 2 may be installed in an air-conditioning room or a machine room separately provided from a room where the air handling units 1 and 2 are air-conditioned in a building in which an air conditioner is installed, and may be installed outdoors.
  • the air handling unit (1) (2) may be made of a plurality of like the chiller (3) (4) (5), the cold water supplied from the plurality of chiller (3) (4) (5) is collected and passed through It is also possible to consist of a singular piece.
  • the air handling unit (1) (2) consists of a plurality, it is also possible to mutually cooperate with each other separate air-conditioning area, and it is also possible to air-condition one air-conditioning area.
  • the chillers (3) (4) (5) are cold water supply units for supplying cold water to the heat exchanger of the air handling unit (1) (2) using a refrigeration cycle consisting of a compressor, a condenser, an expansion mechanism, and an evaporator.
  • the chillers (3) (4) (5) are installed outdoors when the condenser is air cooled, and are installed in machine rooms such as basements or outdoors when the condenser is water cooled.
  • the water pipe 6 includes a common water pipe 7, a chiller connection water pipe 8, 9, 10, and an air handling unit connection pipe 11, 12.
  • the common water pipe 7 passes together the cold water supplied from the plurality of chillers 3, 4, 5 of the water pipe 6.
  • Chiller connection water pipes (8) (9) (10) connect the common water pipe (7) and the plurality of chillers (3) (4) (5).
  • the air handling unit connection pipes 11 and 12 connect the common water pipe 6 and the at least one air handling unit 1 and 2.
  • the water pipe 6 includes a common water pipe 7, a chiller connection water pipe 8, 9, 10, and an air handling unit connection pipe 11, 12 of the chiller 3, 4, 5.
  • the air handling unit (1) (2) includes an air handling unit control unit (13) and (14) for controlling an air blowing fan and a blowing fan for sucking the outdoor air and the indoor air and passing the heat exchanger to the room. .
  • the air handling unit control units 13 and 14 of the respective air handling units 1 and 2 are connected to each other by the communication line 15.
  • the plurality of chillers 3, 4, 5 include chiller control units 16, 17, 18 that control compressors and the like.
  • the chiller control unit 16 of one of the plurality of chillers 3, 4, 5 is connected to the air handling unit control unit 13 of the air handling unit 1, 2 by a communication line 19, and each chiller (3) (4) (5), each chiller control unit 16, 17, 18 is connected to the communication line 20, 21 so that one chiller sends an operation command to the other chiller.
  • the air handling unit 1, 2 consists of the first air handling unit 1 and the second air handling unit 2, and the chillers 3, 4, 5 are the first chiller ( 3) and the second chiller 4 and the third chiller 5, the air handling unit control unit 13, 14 of each of the first air handling unit 1 and the second air handling unit 2; Is connected to the communication line 15, the air handling unit control unit 13 of any one of the first air handling unit (1) and the second air handling unit (2) is the first, second, third chillers (3) (4) (5) is connected to the chiller control unit 16 of the first chiller (3) and the communication line 19, the chiller control unit (17) of the chiller control unit 16 and the second chiller (4) of the first chiller (3).
  • the control unit 18 connects the communication line 21 to allow the second chiller 4 to input a driving command to the third chiller 5. It is connected.
  • the air handling unit (1) (2) has a space therein and includes an indoor air intake section (22A), an indoor air outlet (22B), an outside air intake (22C), and an air conditioning air outlet (22D). And an air handling unit case 22.
  • the air handling units (1) and (2) are installed inside the air handling unit case 22, and blower fans 27 and 28 for flowing outdoor air and indoor air, and inside the air handling unit case 22. It further includes a heat exchanger (40) installed to heat-exchange the cold air with the air flowing toward the air conditioning air outlet (22D).
  • the air handling unit (1) (2) has a ventilation duct (22E) which communicates the indoor and indoor air intakes (22A) so that indoor air is sucked into the air handling unit case (22) through the indoor air intakes (22A). Is connected.
  • the air handling unit (1) (2) communicates with the indoor air outlet (22B) and outdoors so that some of the air sucked into the air handling unit case (22) is discharged to the outside through the indoor air intake (22A).
  • the exhaust duct 22F is connected.
  • the air handling unit (1) (2) has an outdoor air duct (22G) which communicates the outdoor and outdoor air intakes (22C) so that outdoor air is sucked into the air handling unit case (22) through the outdoor air intakes (22C). ) Is connected.
  • the air handling unit (1) (2) is connected to the air conditioning air outlet (22D) and the air supply duct (22H) in communication with the room so that the air air-conditioned inside the air handling unit case 22 is supplied to the room.
  • the ventilation duct 22E is connected to the indoor air intake 22A
  • the exhaust duct 22F is connected to the indoor air outlet 22B
  • the outdoor air duct 22G is connected to the outdoor air intake 22C
  • the air supply duct 22H is connected to the air conditioning air outlet 22D.
  • the air handling unit (1) (2) some of the indoor air sucked into the indoor air intake unit 22A is exhausted to the outside through the indoor air outlet 22B, and the other is sucked into the outside air intake unit 22C. And the mixed air is heat-exchanged with the heat exchanger 40 and then supplied to the room through the air conditioning air outlet 22D and the air supply duct 22H.
  • the air handling units 1 and 2 are provided with a mixing chamber 26 in which indoor air and outdoor air are mixed before the heat exchanger 40 in the air flow direction.
  • the blowing fans 27 and 28 are positioned between the indoor air inlet 22A and the indoor air outlet 22B in the direction of the flow of the indoor air, and blow the indoor air into the air handling unit case 22 for blowing.
  • Air conditioning unit 22D which is located between the heat exchanger 40 and the air conditioning air outlet 22D in the flow direction of the mixed air, and sucks the mixed air into the heat exchanger 40, and then the air conditioning air outlet 22D.
  • Blowing fan (27) (28) is made of a flow rate variable blowing fan to adjust the flow rate.
  • the blower fans 27 and 28 are blowers 29, a housing 32 formed with an air inlet 30 and an air outlet 31 surrounding the blower 29, and a blower for rotating the blower 29.
  • the drive source 33 is included.
  • the blower drive source 33 may be made of a motor having a rotational shaft connected to the rotational center of the blower 29.
  • the blower driving source 33 may be a shaft 34 connected to the rotational center of the blower 29 and a motor installed to be located outside the housing 32. It is also possible to comprise a power transmission member for connecting the 35 and the driving force of the motor 35 to the shaft 34.
  • the power transmission member is composed of a drive pulley 36 provided on the rotating shaft of the motor 35 and a driven pulley 38 provided on the shaft 34, and a belt 37 wound around the drive pulley 35 and the driven wind vane 38. Can be done.
  • the motor 35 consists of an inverter motor which can vary the rotation speed of the blower 29.
  • the heat exchanger 40 is a kind of cooling coil in which the mixed air and cold water are heat-exchanged to cool the mixed air, and has a cold water coil having a flow path through which the cold water passes.
  • the heat exchanger 40 is installed to be located between the mixing chamber 26 and the supply pan 27, to which the water pipe 6, in particular the air handling unit connection pipe 11, 12 is connected.
  • the air handling unit (1) (2) further includes dampers (43) (44) (45) for adjusting the ratio of indoor air and outdoor air in the mixed air.
  • the dampers 43, 44, and 45 are installed at the indoor air outlet 22B to control the indoor air exhaust amount, and the outdoor air intake 22C to adjust the outdoor air intake.
  • the outdoor air damper 44 and the mixing damper 45 installed in the mixing chamber 26 to adjust the amount of air sucked into the mixing chamber 26 in the indoor air.
  • the chillers (3) (4) (5) include a chiller case (50), a compressor (51) for compressing a refrigerant, a condenser (52) for condensing the refrigerant compressed by the compressor (51), and a condenser (52). And an evaporator 54 in which the condensed refrigerant expands and an evaporator 54 in which the refrigerant expanded in the expansion mechanism 53 exchanges heat with water.
  • the compressor 51, the condenser 52, the expansion mechanism 53 and the evaporator 54 form a refrigeration cycle.
  • the chillers 3, 4 and 5 are installed outdoors when the condenser 52 is air cooled, and are installed in a machine room such as a cellar or outdoors when the condenser 52 is water cooled.
  • the chiller case 50 is provided with a compressor 51, a condenser 52, an expansion mechanism 53, and an evaporator 54, and when the condenser 52 is air cooled, outdoor air is sucked into the chiller case 50. After the heat exchange with the condenser 52 is made of a structure that is discharged to the outside of the chiller case (50).
  • the compressor 51 is composed of a variable displacement compressor having a variable operating capacity, and may be configured such that a plurality of compressors are partially or fully driven according to the load, or may be configured as an inverter compressor having a variable frequency according to the load. .
  • Compressor 51 has a discharge pipe is connected to the condenser 52, the discharge pipe is provided with an oil separator (55) for separating the oil from the refrigerant and oil flowing out of the compressor 51, the oil separator (55) An oil recovery flow path 56 for allowing oil to be recovered to 51 is connected.
  • the condenser 52 causes the refrigerant to be condensed by the outdoor air blown by the outdoor fan 57 or the refrigerant to be condensed by the cooling water supplied by a cooling tower (not shown).
  • the refrigerant is condensed by the outdoor air blown by the air.
  • the evaporator 54 is a kind of cooler connected to the heat exchanger 40 and the water pipe 6 of the air handling units 1 and 2 to cool the water while the refrigerant expanded in the expansion mechanism 53 evaporates.
  • the evaporator 54 is formed with a refrigerant passage through which a refrigerant passes and a water passage through which water passes.
  • the evaporator 54 comprises a shell-tube including a plurality of inner tubes through which water passes and having a water flow path, and a shell having a refrigerant flow path formed outside the plurality of inner tubes and through which the refrigerant passes.
  • Type heat exchanger
  • the evaporator 54 is connected to the chiller connecting pipes 8, 9, 10 to a plurality of inner tubes.
  • the water pipe 6 is disposed to pass through the chiller case 50 and the air handling unit case 22, respectively, and the water pipe 6 is provided with a cold water pump 58 for pumping cold water to be circulated.
  • the cold water pump 58 may be installed at a portion of the water pipe 6 located inside the air handling unit 1, 2, and is installed at a portion located inside the chiller 3, 4, 5. It is also possible, and it can also be provided in the part located between the air handling unit 1 (2) and the chiller (3) (4) (5).
  • the cold water pump 58 is preferably installed in the air handling unit (1) (2) or chiller (3) (4) (5) to facilitate the control and wire connection.
  • the chillers 3, 4, and 5 have different temperatures of the cold water discharged from the evaporator 54 according to the operating capacity of the compressor 51.
  • the chillers 3, 4, and 5 are operated according to the cold water set temperature Twt. Control the capacity.
  • the chillers (3) (4) (5) set the cold water set temperature (Twt) of the chiller in operation according to the differential pressure between the high pressure side and the low pressure side of the chiller in operation.
  • the chiller (3) (4) (5) further includes a low pressure sensor (59) for detecting the suction side pressure of the compressor 51, and a high pressure sensor (60) for detecting the discharge side pressure of the compressor (51),
  • the control unit 16, 17, 18 sets the cold water set temperature Twt according to the differential pressure between the high pressure sensed by the high pressure sensor 60 and the low pressure sensed by the low pressure sensor 59, and sets the set cold water set temperature Twt. ), The operating capacity of the compressor 51 is adjusted.
  • the low pressure sensor 59 is installed in a suction pipe connected to suck the refrigerant into the compressor 51, and the high pressure sensor 60 is installed in the discharge pipe through which the refrigerant discharged from the compressor 51 is guided.
  • the chiller control unit 16, 17, 18 sets the cold water set temperature Twt within the cold water variable lower limit value Twtmin and the cold water variable upper limit value Twtmax which are the ranges in which the cold water temperature can be varied.
  • the chiller control unit (16) (17) (18) controls the compressor 51 for the reference operating capacity so as to correspond to the reference cold water setting temperature among the cold water setting temperature variable ranges at the initial operation of the air conditioner, and then the low pressure sensor (59). And sets a new cold water set temperature (Twt) according to the difference between the pressure sensed by the high pressure sensor 60, and drives the compressor 51 with an operating capacity corresponding to the newly set cold water set temperature (Twt).
  • the chiller (3) (4) (5) is set to the cold water set temperature (Twt) as described above, if the pressure difference between the high pressure and the low pressure is higher than the set value for the set time, the chiller that is currently operating does not correspond to the load because The chilled water set temperature Twt is increased to reduce the power consumption of the chiller that is the driver, and if there is a chiller that is not currently running, the operation command is sent to the chiller that is not currently running.
  • the air conditioner operates and stops a common water pipe temperature sensor 62 that measures a temperature of the common water pipe 7 among the water pipes 6, and an air conditioner. And a control unit 64 for inputting a desired temperature such as an indoor set temperature.
  • the common water pipe temperature sensor 62 detects the temperature of the cold water supplied to the air handling units 1 and 2 after flowing out of the chillers 3, 4 and 5, and the common water of the water supply pipes. It is installed in the pipe (7).
  • the chiller control unit 16, 17, 18 operates / stops the chiller 3, 4, 5 according to the input of the control unit 64, and senses the low pressure sensor 59 and the high pressure sensor 60.
  • the chilled water set temperature (Twt) is newly set according to the pressure applied, and the chiller which is not currently operated is operated.
  • the cold water set temperature (Twt) is newly updated according to the temperature of the cold water detected by the common water pipe temperature sensor 62.
  • the operating capacity of the compressor is adjusted to the newly set cold water set temperature (Twt).
  • the air handling units 1 and 2 are driven, and at least one of the chillers 3, 4 and 5 is driven.
  • the plurality of chillers (3) (4) and (5) drive the compressor (51) and the outdoor fan (57) while the chiller control unit (16) (17) (18) of the chiller is the driver.
  • the dog is also regulated and the cold water pump 58 is driven.
  • the compressor 51 When the compressor 51 is driven, the refrigerant circulates through the compressor 51, the condenser 52, the expansion mechanism 53, and the evaporator 54. At this time, the refrigerant passing through the evaporator 54 removes heat from the water while Lower the temperature.
  • the water cooled in the evaporator 54 cools the heat exchanger 40 of the air handling unit 1 and 2 through the water pipe 6, and then the water pipe 6 is opened. Recovered to the evaporator 54 through, where water cools the heat exchanger 40 while circulating the evaporator 54 and the heat exchanger 40.
  • the chiller control unit of the chiller which is the driver, determines the operating capacity of the compressor 51 according to the cold water set temperature, drives the compressor 51 at the determined operating capacity, and the chiller currently stopped. If it is to be operated, drive the chiller which is currently stopped.
  • the chiller control unit (16) (17) (18) drives the compressor (51) by setting the cold water set temperature (Twt) as the reference cold water set temperature (Twi) of the cold water set temperature range during the initial operation of the air conditioner.
  • Twt cold water set temperature
  • Twi reference cold water set temperature
  • the chiller control unit of operator's Chiller responds to the standard cold water set temperature.
  • the compressor 51 is controlled by the operating capacity, and the cold water set temperature is varied according to the difference between the high pressure and the low pressure and the temperature of the common water pipe 7 during the driving of the compressor 51, and then corresponds to the variable cold water set temperature.
  • the compressor 51 is controlled to the operating capacity to be.
  • the chiller 3 which is the driver, varies the cold water set temperature Twt according to the difference between the high pressure and the low pressure.
  • the operation method of the air conditioner which drives another chiller 4 and changes cold water set temperature Twt according to the temperature of the common water pipe 7 is demonstrated in detail.
  • FIG. 5 is a flowchart illustrating an embodiment of a method of operating an air conditioner according to the present invention.
  • One embodiment of the operation method of the air conditioner according to the present invention includes a cold water set temperature setting step (S1) (S2), and compressor operation capacity adjustment step (S3).
  • Cold water set temperature setting step (S1) (S2) sets the cold water set temperature in accordance with the differential pressure of the high pressure and low pressure of the chiller (3) which is the operation.
  • the cold water set temperature setting step (S1) (S2) takes into account the operation of the chiller 4 that is not currently running, as described later, and the current operation.
  • the cold water set temperature of the chiller 3 in operation is increased so that the power consumption of the chiller 3 is reduced.
  • the cold water set temperature setting step (S1) (S2) is a reference cold water set temperature (Twi) is the current cold water set temperature and the reference cold water set temperature (Swi) if the detection time of high and low pressure is immediately after the initial operation of the chiller (3). Twi) is set to a temperature higher than the set point (e.g., 0.5 DEG C) to the subsequent cold water set point.
  • the cold water set temperature at the time of detecting high pressure and low pressure is the current cold water set temperature and is set higher than the cold water set temperature at the time of detecting high pressure and low pressure. For example, 0.5 ° C.) set the high temperature to the subsequent cold water set temperature.
  • the differential pressure is not more than the set pressure for the set time, the conventional cold water set temperature is maintained.
  • the compressor operation capacity adjusting step S3 is to adjust the operation capacity of the compressor 51 according to the cold water set temperature Twt set in the cold water set temperature set step S1 and S2, and the differential pressure during the set time. (For example, 10 minutes) When the pressure is higher than or equal to the set pressure, the compressor 51 is controlled to an operating capacity corresponding to the increased cold water set temperature.
  • the control of the compressor 51 is maintained at an operating capacity corresponding to the conventional cold water set temperature.
  • the operation method of the air conditioner if there is a chiller (4) that is not currently running among the plurality of chillers together with or after the compressor operation capacity adjusting step (S3) as described above, the operation command to the chiller (4) that is not currently running.
  • the operation command transmission step (S4) (S5) for transmitting the operation is performed, and if there is no chiller that is not currently running among the plurality of chillers, that is, if all the chillers are currently operating, the operation command transmission step is not performed.
  • Operation command transmission step (S4) (S5) is transmitted to the chiller (4) that is currently unoperated together with the operation command to transmit the stop set temperature of the chiller (4) that is not currently running, and the chiller (4) that is not currently running is the received operation
  • the drive is further started and stopped.
  • the chiller 4 receiving the operation command as described above and the stop set temperature of the chiller not only drives the compressor 51 and the outdoor fan 57, but also adjusts the expansion mechanism 53, and controls the cold water pump 58. Drive it.
  • At least one air handling unit (1) (2) is passed through a greater amount of cold water than before the chiller (4) that was not running, the temperature of the cold air supplied to the room from the air handling unit (1) (2) Is lower than before the chiller 4, which had not been driven, is further operated, and the load in the room is gradually reduced.
  • the chiller 3 performs cold water according to the cold water outlet temperature of the common water pipe 7 among the water pipes 6. Set the set temperature.
  • the chiller 3 performs the cold water set temperature setting step S1 (S2) when the cold water outlet temperature of the common water pipe 7 of the water pipes 6 is equal to the cold water set temperature after the operation command transmission step S4 and S5. Return to). That is, since the cold water coincides with the cold water set temperature by the additional operation of the chiller 4 that was not running, the cold water set temperature setting step (S1) (S2) does not change the additional cold water set temperature and detects the subsequent load variation. Return to).
  • the chiller 3 is cold water for increasing the cold water set temperature if the cold water outlet temperature of the common water pipe 7 of the water pipe 6 is lower than the cold water set temperature after the operation command transmission step (S4) (S5).
  • the cold water set temperature increasing step S7 includes a compressor operating capacity readjustment step S9 of adjusting the operating capacity of the compressor 51 according to the cold water set temperature set in the step S8.
  • the chiller 3 that was in operation for reducing power consumption is reduced when the cold water outlet temperature of the common water pipe 7 falls below the cold water set temperature.
  • the cold water set temperature is lowered again and the compressor 1 is controlled accordingly.
  • the stop step (S10) (S11) of stopping the chiller (3) as an operation is further performed.
  • the chiller stop set temperature is preferably set to the maximum temperature of the chiller set temperature (Twt) variable range of the chiller that was in operation.
  • the chiller 3 is configured to reduce the cold water set temperature if the chilled water outlet temperature of the common water pipe 7 of the water pipes 6 is greater than the cold water set temperature after the operation command transmission step S4 or S5.
  • the compressor operation capacity re-adjustment step S13 of adjusting the operation capacity of the compressor 51 according to the cold water setting temperature set in the cold water setting temperature reduction step S12 is included.
  • the operation method of the air conditioner is returned to the cold water set temperature setting step (S1) (S2) after the compressor operation capacity readjustment step (S13).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

L'invention concerne un climatiseur comprenant un compresseur, un condenseur, un détendeur et un évaporateur, des conduites d'eau raccordées à l'évaporateur pour l'alimentation en eau froide et une pluralité de refroidisseurs auxquels des conduites d'eau respectives sont raccordées parallèlement les unes aux autres. La température de l'eau froide du refroidisseur en fonctionnement parmi plusieurs refroidisseurs est réglée en fonction de la différence entre un côté haute pression et un côté basse pression, et la capacité du compresseur est ajustée en fonction de la température réglée de l'eau froide. Si la différence entre le côté haute pression et le côté basse pression est supérieure à un niveau préétabli pour une durée préétablie et si un refroidisseur n'est pas en fonctionnement pour le moment, une commande de mise en marche est transmise au refroidisseur qui n'est pas en fonctionnement pour le moment. Ainsi, le climatiseur de la présente invention fonctionne de manière efficace en fonction des charges et la consommation d'énergie est minimisée.
PCT/KR2010/002937 2009-05-11 2010-05-07 Climatiseur et procédé pour le faire fonctionner WO2010131874A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10775076.2A EP2431677A4 (fr) 2009-05-11 2010-05-07 Climatiseur et procédé pour le faire fonctionner
CN201080025167.3A CN102460029B (zh) 2009-05-11 2010-05-07 空气调节器及其运行方法
US13/319,668 US20120131935A1 (en) 2009-05-11 2010-05-07 Air conditioner and method for operating same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090040916A KR20100121961A (ko) 2009-05-11 2009-05-11 공기조화기
KR10-2009-0040916 2009-05-11

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WO2010131874A2 true WO2010131874A2 (fr) 2010-11-18
WO2010131874A3 WO2010131874A3 (fr) 2011-01-27

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EP (1) EP2431677A4 (fr)
KR (1) KR20100121961A (fr)
CN (1) CN102460029B (fr)
WO (1) WO2010131874A2 (fr)

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KR101854336B1 (ko) * 2011-10-28 2018-06-14 엘지전자 주식회사 공기조화기 및 그 제어방법
CN102788005B (zh) * 2012-08-02 2015-03-11 青岛海信日立空调系统有限公司 一种优化多联机空调系统中压缩机运行控制的方法及装置
CN103968478B (zh) * 2013-02-01 2018-02-23 Lg电子株式会社 冷却系统及其控制方法
CN104279722B (zh) * 2013-07-11 2017-04-12 盟立自动化股份有限公司 空调节能控制装置的控制方法
JP6338663B2 (ja) * 2014-06-19 2018-06-06 三菱電機株式会社 冷凍サイクル装置および冷凍サイクルシステム
JP2016008788A (ja) * 2014-06-25 2016-01-18 ダイキン工業株式会社 空気調和システム
EP3165849B1 (fr) * 2014-07-02 2023-04-26 Mitsubishi Electric Corporation Dispositif de source de chaleur et système de source de chaleur doté d'un dispositif de source de chaleur
CN107532805A (zh) * 2015-04-21 2018-01-02 三菱电机株式会社 热源单元
CN106322641B (zh) * 2015-07-06 2019-06-25 约克广州空调冷冻设备有限公司 空调机组控制方法、空调机组、空调机组群及空调机组群控制方法
CN207350718U (zh) * 2015-10-26 2018-05-11 三菱电机株式会社 空调系统
CN106671728A (zh) * 2015-11-06 2017-05-17 福特环球技术公司 空调系统及其控制方法
JP2018063097A (ja) * 2016-10-14 2018-04-19 三菱重工サーマルシステムズ株式会社 空冷チラー
TWI644062B (zh) * 2017-06-26 2018-12-11 群光電能科技股份有限公司 調整系統

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Also Published As

Publication number Publication date
EP2431677A2 (fr) 2012-03-21
WO2010131874A3 (fr) 2011-01-27
CN102460029A (zh) 2012-05-16
EP2431677A4 (fr) 2016-04-27
KR20100121961A (ko) 2010-11-19
CN102460029B (zh) 2014-06-18
US20120131935A1 (en) 2012-05-31

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