WO2003081140A1 - Climatiseur et procede de commande de climatiseur - Google Patents
Climatiseur et procede de commande de climatiseur Download PDFInfo
- Publication number
- WO2003081140A1 WO2003081140A1 PCT/JP2003/002813 JP0302813W WO03081140A1 WO 2003081140 A1 WO2003081140 A1 WO 2003081140A1 JP 0302813 W JP0302813 W JP 0302813W WO 03081140 A1 WO03081140 A1 WO 03081140A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- indoor
- motor
- air conditioner
- heat exchanger
- indoor units
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 34
- 238000004378 air conditioning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F3/06—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 characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—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 characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/345—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
- F25B41/347—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids with the valve member being opened and closed cyclically, e.g. with pulse width modulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0232—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
- F25B2313/02323—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses during heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
-
- 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
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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, particularly to a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit, and a control method of the multi-type air conditioner.
- an air conditioner including an outdoor unit and an indoor unit
- a so-called multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit.
- a refrigerant circuit is configured between an outdoor unit having a compressor and an outdoor heat exchanger and a plurality of indoor units each having an indoor heat exchanger.
- an electric valve for adjusting the amount of refrigerant flowing through each indoor heat exchanger is provided.
- the high-temperature refrigerant from the compressor is distributed to each indoor heat exchanger, and each indoor heat exchanger performs the heating operation.
- each motor-operated valve adjusts the opening degree according to the temperature of the discharge pipe of the compressor, the temperature in the room where each indoor unit is arranged, and the like, and adjusts the amount of refrigerant.
- stop room a room in which the indoor unit has stopped operating during the heating operation
- the motorized valve in the stop room generates refrigerant pool in the indoor heat exchanger.
- the motor-operated valve is opened to some extent and a small amount of refrigerant is allowed to flow. If the opening of the motor-operated valve at this time is a fixed value, it cannot respond to changes in the actual operating conditions, and it is difficult to perform stable refrigerant control.
- the amount of the liquid refrigerant staying between the stop rooms may be different.
- the electric valve is controlled uniformly, so not only the electric valve in the room where a large amount of liquid refrigerant is retained, but also other electric valves are opened. Will be in a state of being This causes the generation of refrigerant noise in the stop room where the liquid refrigerant does not stay.
- An object of the present invention is to provide air that can perform stable refrigerant control even when a multi-type air conditioner is performing a heating operation and there are a plurality of indoor units that have stopped operating. It is an object of the present invention to provide a control method for a conditioner and an air conditioner.
- the refrigerant circuit connects the outdoor heat exchanger, the compressor, and the plurality of indoor heat exchangers.
- the motor-operated valve is provided in the refrigerant circuit and adjusts the amount of refrigerant flowing through each of the plurality of indoor heat exchangers.
- Discharge pipe temperature sensor The sensor detects the temperature of the discharge pipe of the compressor.
- the motor-operated valve opening correction means determines the opening of the motor-operated valve corresponding to the stopped indoor unit based on the discharge pipe temperature when there are multiple indoor units that have stopped operating during the heating operation. Control.
- the electric valve opening correction means corrects the opening of the electric valve corresponding to the indoor unit whose operation is stopped for each electric valve.
- the electrically operated valve corresponding to the stopped indoor unit means an electrically operated valve that adjusts the amount of refrigerant flowing to the indoor heat exchanger of the stopped indoor unit.
- the opening of the motor-operated valve corresponding to the indoor unit whose operation is stopped is not uniformly controlled for all motor-operated valves. Each time is corrected. For this reason, it is possible to correct and control the optimal opening degree of the motor-operated valve in accordance with a difference in environment that affects the refrigerant, such as the temperature and location of the room where the indoor unit is placed.
- stable refrigerant control can be performed even when the heating operation is performed and the indoor unit is stopped in operation.
- the invention according to claim 2 is the air conditioner according to claim 1, further comprising a liquid pipe temperature sensor that detects a liquid pipe temperature between the indoor heat exchanger and the electric valve. Then, when there are a plurality of indoor units that are stopped during the heating operation, the electric valve opening correction means stops the operation and the average value of the liquid pipe temperature of the indoor units that are stopped. Correct the opening of the motor-operated valve corresponding to the indoor unit whose operation has been stopped for each motor-operated valve so that the difference from the liquid pipe temperature of the indoor unit falls within a certain range.
- this air conditioner operation is performed so that the difference between the average value of the liquid pipe temperatures of all the indoor units that are stopped and the liquid pipe temperature of the indoor units that are stopped is within a certain range.
- the opening of the motorized valve corresponding to the stopped indoor unit is controlled for each motorized valve.
- the amount of the refrigerant flowing in the indoor unit whose operation is stopped can be made substantially equal for each indoor unit.
- malfunctions that occur when liquid pools in the indoor heat exchanger occur or when the amount of refrigerant flowing through the indoor units that are not operating differ for each indoor unit, such as generation of refrigerant noise and air conditioner Can be reduced, such as a decrease in overall heating capacity.
- An invention according to claim 3 is an outdoor unit having an outdoor heat exchanger, a plurality of indoor units having an indoor heat exchanger, and a refrigerant connecting the outdoor heat exchanger, the compressor, and the plurality of indoor heat exchangers.
- An air conditioner comprising a circuit, a plurality of motor-operated valves provided in the refrigerant circuit to regulate the amount of refrigerant flowing through each of the plurality of indoor heat exchangers, and a discharge pipe temperature sensor for detecting a discharge pipe temperature of the compressor.
- Control method comprising a first step and a second step.
- the opening of the motor-operated valve corresponding to the indoor unit that has stopped operating is set based on the discharge pipe temperature.
- the above-mentioned electric valve opening is corrected for each electric valve.
- the degree of opening of the motorized valves corresponding to the indoor units whose operation is stopped is not corrected uniformly for all motorized valves, but is corrected for each motorized valve. You. For this reason, it is possible to correct and control the optimal opening of the motor-operated valve in accordance with a difference in environment that affects the refrigerant, such as the temperature of the room in which the indoor unit is placed, the location, and the like.
- stable refrigerant control is performed even when the heating operation is being performed and there are a plurality of indoor units that are not operating. be able to.
- FIG. 1 is a configuration diagram of an air conditioner.
- FIG. 2 is a schematic diagram of a refrigerant circuit of the air conditioner.
- FIG. 3 is a control block diagram.
- FIG. 4 is a control flowchart of a motor-operated valve opening degree.
- FIG. 5 is a control flowchart of the electric valve opening correction.
- FIG. 1 shows an air conditioner 1 employing an embodiment of the present invention.
- the air conditioner 1 is a so-called multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit.
- This air conditioner 1 has four indoor units 3a, 3b, 3c, 3 (1 is connected by refrigerant pipes 4 &, 4b, 4c, 4d) to one outdoor unit 2. These four rooms Machines 3a, 3b, 3c, 3d are arranged in separate rooms. Here, it is assumed that only the indoor unit 3a is performing the heating operation, and the other three indoor units 3b, 3c, and 3d are in the stopped state.
- FIG. 2 schematically shows the refrigerant circuit 5 of the air conditioner 1.
- the refrigerant circuit 5 includes one outdoor unit 2 and four indoor units 3 a, 3 b, 3 c, and 3 d connected in parallel to the outdoor unit 2.
- the outdoor unit 2 includes a compressor 20, a four-way switching valve 21, an outdoor heat exchanger 22, an accumulator 23, and the like. Further, on the discharge side of the compressor 20, a discharge pipe thermistor 24 for detecting the discharge pipe temperature on the discharge side of the compressor 20 is attached.
- the outdoor unit 2 includes an outdoor air thermistor 25 for detecting the outdoor air temperature and an outdoor heat exchange thermistor 26 for detecting the temperature of the outdoor heat exchanger 22.
- the indoor unit 3a includes an indoor heat exchanger 30a and an electric valve 33a, and the indoor heat exchanger 30a and the electric valve 33a are connected in series.
- the motor-operated valve 33a is provided on the outlet side of the indoor heat exchanger 30a and adjusts the amount of refrigerant flowing through the indoor heat exchanger 30a.
- the indoor unit 3a includes a room temperature thermistor 31a for detecting the indoor temperature and an indoor heat exchange thermistor 32a for detecting the temperature of the indoor heat exchanger 30a.
- the pipe between the indoor heat exchanger 30a and the electric valve 33a is provided with a liquid pipe thermistor 34 for detecting the temperature of the liquid pipe between the indoor heat exchanger 30a and the electric valve 33a. Have been.
- a gas pipe thermistor 35 for detecting the temperature of the refrigerant passing therethrough is provided.
- the other indoor units 3b, 3c, and 3d have the same configuration.
- the same symbols are given to the indoor heat exchanger, the motor-operated valve, and various thermistors.
- motorized valves 33a, 33b, 33c, 33d are not necessarily built in the indoor units 3a, 3b, 3c, 3d, but are installed in the indoor units 3a, 3b, 3c, 3d.
- it may be provided outside the 3d, for example, inside a branch unit that connects each indoor unit 3a, 3b, 3c, 3d to the outdoor unit 2.
- FIG. 1 a control block diagram of the air conditioner 1 is shown in FIG.
- the outdoor unit 2 includes an outdoor control unit 27 including a microprocessor, a ROM, a RAM, various interfaces, and the like.
- Various sensors such as a discharge pipe thermistor 24, an outdoor air thermistor 25, and an outdoor heat exchange thermistor 26 are connected to the outdoor control unit 27, and a detection signal of each sensor is input.
- the outdoor control unit 27 is configured to control each part during operation by supplying a control signal to the connected compressor 20, the four-way switching valve 21, and the like.
- the indoor unit 3a includes an indoor control unit 36a including a microprocessor, a ROM, a RAM, and various interfaces similar to those of the outdoor unit 2.
- a room temperature thermistor 31a, an indoor heat exchange thermistor 32a, a liquid pipe thermistor 34a, and a gas pipe thermistor 35a are connected to the indoor control unit 36a, and are configured to input detection signals from each sensor. Have been.
- the indoor control unit 36a is connected to a motor-operated valve 33a provided in the indoor unit 3a, and is configured to transmit a control signal to each motor-operated valve 33a to adjust the opening. I have.
- a transmission line 40a is provided between the outdoor control unit 27 and the indoor control unit 36a, and various data can be input / output via the transmission line 40a.
- the indoor control units 36b, 36c, and 36d of the indoor units 3b, 3c, and 3d transmit data to the outdoor control unit 27, respectively. They are connected by lines 40b, 40c, 40d.
- the outdoor control unit 27 controls the air conditioning operation by controlling the operation frequency of the compressor 20 according to various conditions during operation.
- the indoor control units 36a, 36b, 36c, and 36d control the air-conditioning operation by controlling the opening pulse of the motor-operated valve 33a according to various conditions during operation. Further, the outdoor control unit 27 determines the opening degree of the indoor units 3 b, 3 c, 3 (the electric valve 331 of 1), 33 c, 33 d whose operation is stopped based on the discharge pipe temperature. The feedback control is performed, and the opening is corrected for each of the motor-operated valves 33b, 33c, and 33d.
- the control of the indoor units 3b, 3c, 3 (1 motorized valve 331), 33c, and 33d whose operation is stopped will be described.
- a multi-type air conditioner In a multi-type air conditioner, multiple indoor units are placed in different rooms, and multiple Air conditioning of the room is performed, but not all indoor units are operated at the same time. That is, some indoor units may be operating, and the remaining indoor units may be stopped.
- the room where the indoor unit 3a that is operating is located is called the ⁇ operating room ''
- the room where the indoor units 3b, 3c, and 3d that are not operating are located is called the ⁇ stop room ''.
- the control of the motor-operated valve in the stop room when the heating operation is being performed and there are a plurality of stop rooms will be described.
- the opening of the electric valve 33a in the operating room is determined based on the discharge pipe temperature To, and the opening of the electric valves 33b, 33c, 33d in the stop room is It is determined to be a value proportional to the opening of the motor-operated valve 33a in the operating room determined based on the pipe temperature To.
- step S11 the condensing temperature T ca of the indoor heat exchanger 30a in the operating room and the evaporating temperature Te of the outdoor heat exchanger 22 and the force are respectively the indoor heat exchange thermistor 32a and the outdoor heat exchange thermistor 26. And is detected by
- step S12 the target discharge pipe temperature Tm is calculated by the following equation.
- Tm a XT c a + b XTe + s h 1
- step S13 the deviation between the target discharge pipe temperature Tm and the discharge pipe temperature To detected by the discharge pipe thermistor 24 is calculated, and the amount of change in the discharge pipe temperature To at regular intervals is calculated.
- step S14 the opening of the motor-operated valve 33a in the cab is determined. Further, in step S15, the degree of opening of the motor-operated valves 33b, 33c, 33d in the stop room is determined. That is, the opening degree of the electric valve 33a in the operating room is multiplied by a certain coefficient d to obtain the target electric valve opening degree of the electric valves 33b, 33c, 33d in the stop room. Next, as shown in the flowchart of FIG. 5, the target electric valve opening is corrected for each electric valve 33b, 33c, 33d in the stop room.
- step S21 (1) the air conditioner 1 is in the heating operation, and (2) the electric valves 33b, 33c, and 33d are in the feedback control. It is determined whether or not both conditions are satisfied. When both of the above conditions are satisfied, the process proceeds to step S22.
- step S22 the sampling timer TTHS5 is set up.
- step S23 it is determined whether or not the sampling timer TTHS5 has reached a predetermined time. When the sampling timer TTHS5 has reached a predetermined time, the process proceeds to step S24.
- step S24 first, (1) detection of the liquid tube temperature T1 # in each stop room is performed. Next, (2) the average value T1aVe of the liquid pipe temperatures in each stop room is calculated. Then, (3) a deviation T 1 # between the liquid tube temperature T 1 # of each stop room and the average value T 1 a V e is calculated.
- # above means any of the symbols b, c, and d attached to each indoor unit in the stopped room.
- step S25 it is determined whether the absolute value of the deviation obtained in step S24 is equal to or more than a predetermined value T1abs for each stopped room. If the absolute value of the deviation is equal to or larger than the predetermined value, the process proceeds to step S25. If the absolute value of the deviation is smaller than the predetermined value, the process returns to step S21.
- step 26 the correction amount of the opening of the motor-operated valves 33b, 33c, 33d is calculated, and the opening of the motor-operated valves 33b, 33c, 33d is corrected for each stop room.
- the amount of correction of the opening is calculated by multiplying the deviation by a negative coefficient.
- the liquid tube temperature T l # increases, and in an indoor heat exchanger with a low refrigerant flow rate, the liquid tube temperature T l # decreases.
- the opening degree of each motor-operated valve is set so that the target motor-operated valve with a lower liquid pipe temperature ⁇ 1 # is opened and the target motor-operated valve with a higher liquid pipe temperature ⁇ 1 # is closed. Is corrected.
- the degree of opening of the electrically operated valves 33b, 33c, 33d in the stop room is controlled based on the discharge pipe temperature To, and all the indoor units 3b, 3c, 3d in the stop room. So that the difference between the average value between the liquid pipe temperatures T 1 b, T ic and T 1 d and the liquid pipe temperature T 1 # of the indoor units 3 b, 3 c and 3 d in the stop room is within a certain range.
- the electric valves 33b, 33c and 33d are controlled individually. For this reason, indoor units 3b, 3c, 3d may be used when indoor units 3b, 3c, 3d are placed on different floors or when indoor temperatures differ.
- the amount of refrigerant flowing in the indoor units 3b, 3c, and 3d that are not operating should be approximately equal for each indoor unit 3b, 3c, and 3d. I can do it.
- the degree of opening of the motorized valves 33b, 33c, 33d in the stop room is controlled more finely than in the case of only control using the discharge pipe temperature To. be able to. Thereby, even when there are a plurality of stop rooms, more stable refrigerant control can be performed.
- the deviation ⁇ 1 # between the liquid pipe temperature T 1 # and the average value T lave of each stop room is equal to or greater than a predetermined value. Is determined, and no correction is performed for the motor-operated valve having a small deviation ⁇ 1 #. Therefore, when the deviation ⁇ 1 # is small, it is determined that the influence of the refrigerant drift is small, and the change in the opening degree can be omitted.
- the opening degree of the motorized valve corresponding to the indoor unit whose operation is stopped is not controlled uniformly for all the motorized valves. Since each correction is performed by the correction means for each motor-operated valve, stable refrigerant control can be performed even when the heating operation is being performed and there are a plurality of indoor units that have stopped operating. .
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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)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES03708529.7T ES2510640T3 (es) | 2002-03-27 | 2003-03-10 | Acondicionador de aire y procedimiento de control de un acondicionador de aire |
EP03708529.7A EP1496316B1 (en) | 2002-03-27 | 2003-03-10 | Air conditioner, and method of controlling air conditioner |
AU2003213441A AU2003213441B2 (en) | 2002-03-27 | 2003-03-10 | Air conditioner, and method of controlling air conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002/89150 | 2002-03-27 | ||
JP2002089150A JP3772777B2 (ja) | 2002-03-27 | 2002-03-27 | 空気調和機および空気調和機の制御方法 |
Publications (1)
Publication Number | Publication Date |
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WO2003081140A1 true WO2003081140A1 (fr) | 2003-10-02 |
Family
ID=28449491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002813 WO2003081140A1 (fr) | 2002-03-27 | 2003-03-10 | Climatiseur et procede de commande de climatiseur |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1496316B1 (ja) |
JP (1) | JP3772777B2 (ja) |
CN (1) | CN1294390C (ja) |
AU (1) | AU2003213441B2 (ja) |
ES (1) | ES2510640T3 (ja) |
WO (1) | WO2003081140A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1571405A3 (en) * | 2004-02-25 | 2006-06-21 | Lg Electronics Inc. | Control method for heat pumps |
CN100363689C (zh) * | 2004-08-04 | 2008-01-23 | 三星电子株式会社 | 多空调系统及其操作方法 |
CN105485868A (zh) * | 2015-12-23 | 2016-04-13 | 宁波奥克斯电气股份有限公司 | 多联机的内机电子膨胀阀的复位控制方法 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100338410C (zh) * | 2004-02-25 | 2007-09-19 | Lg电子株式会社 | 用于复式热泵的控制方法 |
KR100640856B1 (ko) * | 2004-12-14 | 2006-11-02 | 엘지전자 주식회사 | 멀티 공기조화기의 제어방법 |
KR100640858B1 (ko) | 2004-12-14 | 2006-11-02 | 엘지전자 주식회사 | 공기조화기 및 그 제어방법 |
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JP2021038907A (ja) * | 2019-09-05 | 2021-03-11 | 東芝キヤリア株式会社 | 空気調和機 |
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KR100545009B1 (ko) * | 1999-02-03 | 2006-01-24 | 산요덴키가부시키가이샤 | 공기조화기 |
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- 2003-03-10 AU AU2003213441A patent/AU2003213441B2/en not_active Expired
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JP2001304713A (ja) * | 2000-04-17 | 2001-10-31 | Mitsubishi Electric Corp | 空気調和装置および開閉弁 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1571405A3 (en) * | 2004-02-25 | 2006-06-21 | Lg Electronics Inc. | Control method for heat pumps |
US7272943B2 (en) | 2004-02-25 | 2007-09-25 | Lg Electronics Inc. | Control method for multiple heat pump |
CN100363689C (zh) * | 2004-08-04 | 2008-01-23 | 三星电子株式会社 | 多空调系统及其操作方法 |
US7380407B2 (en) | 2004-08-04 | 2008-06-03 | Samsung Electronics Co., Ltd. | Multi air conditioning system and method for operating the same |
CN105485868A (zh) * | 2015-12-23 | 2016-04-13 | 宁波奥克斯电气股份有限公司 | 多联机的内机电子膨胀阀的复位控制方法 |
CN105485868B (zh) * | 2015-12-23 | 2018-05-22 | 宁波奥克斯电气股份有限公司 | 多联机的内机电子膨胀阀的复位控制方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1496316A1 (en) | 2005-01-12 |
JP3772777B2 (ja) | 2006-05-10 |
CN1294390C (zh) | 2007-01-10 |
CN1643304A (zh) | 2005-07-20 |
EP1496316A4 (en) | 2012-02-01 |
JP2003287260A (ja) | 2003-10-10 |
ES2510640T3 (es) | 2014-10-21 |
AU2003213441A1 (en) | 2003-10-08 |
EP1496316B1 (en) | 2014-07-16 |
AU2003213441B2 (en) | 2006-07-27 |
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