EP3889522A1 - Dispositif de climatisation - Google Patents

Dispositif de climatisation Download PDF

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Publication number
EP3889522A1
EP3889522A1 EP19889376.0A EP19889376A EP3889522A1 EP 3889522 A1 EP3889522 A1 EP 3889522A1 EP 19889376 A EP19889376 A EP 19889376A EP 3889522 A1 EP3889522 A1 EP 3889522A1
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EP
European Patent Office
Prior art keywords
defrosting
indoor
heat exchanger
air
air conditioner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19889376.0A
Other languages
German (de)
English (en)
Other versions
EP3889522A4 (fr
Inventor
Jun UESHIGE
Yasuhisa KIKUCHI
Satoko Sugisaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Carrier Corp
Original Assignee
Toshiba Carrier Corp
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 Toshiba Carrier Corp filed Critical Toshiba Carrier Corp
Publication of EP3889522A1 publication Critical patent/EP3889522A1/fr
Publication of EP3889522A4 publication Critical patent/EP3889522A4/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • 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
    • 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
    • F25B2400/06—Several compression cycles arranged in parallel
    • 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
    • F25B2600/01—Timing
    • 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
    • F25B2600/23—Time delays
    • 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
    • F25B2700/2103—Temperatures near a heat exchanger
    • 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

Definitions

  • Embodiments described herein relate generally to an air conditioning apparatus comprising air conditioners.
  • an air conditioner comprising a heat-pump-type refrigerating cycle which sequentially connects a compressor, a four-way valve, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger by piping and circulates a refrigerant to draw heat from outdoor air and heat indoor air
  • frost gradually attaches on the surface of the outdoor heat exchanger functioning as an evaporator with progress of the heating and, when a frost dosage increases, a heat amount drawn from the outdoor air decreases and a heating capacity decreases.
  • Patent Literature 1 JP 2010-121798 A
  • an air conditioning apparatus air-conditioning the same air conditioning area with a plurality of air conditioners
  • a heating capacity becomes slightly short, the indoor temperature of the air conditioning area decreases, which may give discomfort to a resident.
  • the embodiments described herein aim to provide an air conditioning apparatus capable of suppressing decrease in an indoor temperature caused by defrosting as much as possible.
  • the air conditioning apparatus of claim 1 includes a plurality of air conditioners each including a heat-pump-type refrigerating cycle composed of a compressor, a four-way valve, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger, and executing a defrosting operation for the outdoor heat exchanger when defrosting start conditions of the outdoor heat exchanger are met, and a controller, at start of defrosting of any one of the air conditioners, changing the defrosting start conditions of the air conditioners excluding the air conditioner starting defrosting.
  • indoor units 20 of a plurality of air conditioners 1a, 1b, ... In configuring an air conditioning apparatus are arranged in the same air conditioning area R.
  • An air conditioner 1a serving as a master unit comprises a heat-pump-type refrigerating cycle formed by sequentially connecting a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a decompression device, for example, electric expansion valve 14, and an indoor heat exchanger 21 by piping.
  • a refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger (condenser) 13 through the four-way valve 12, the refrigerant flowing out from the outdoor heat exchanger 13 flows into the indoor heat exchanger (evaporator) 21 through the electric expansion valve 14, and the refrigerant flowing out from the indoor heat exchanger 21 is sucked into the compressor 11 through the four-way valve 12.
  • the refrigerant discharged from the compressor 11 flows into the indoor heat exchanger (condenser) 21 through the four-way valve 12, the refrigerant flowing out from the indoor heat exchanger 21 flows into the outdoor heat exchanger (evaporator) 13 through the electric expansion valve 14, and the refrigerant flowing out from the outdoor heat exchanger 13 is sucked into the compressor 11 through the four-way valve 12, as represented by arrows, by change of the flow path of the four-way valve 12.
  • the same flow of the refrigerant as that at the cooling operation is formed by return of the flow path of four-way valve 12.
  • An outdoor fan 15 sucking outdoor air and passing the outdoor air to the outdoor heat exchanger 13 is arranged in the vicinity of the outdoor heat exchanger 13, and an outside air temperature sensor 16 detecting an outside air temperature To is arranged in a suction air path of the outdoor fan 15.
  • An indoor fan 22 sucking the indoor air of the air conditioning area and passing the air through the indoor heat exchanger 21 is arranged in the vicinity of the indoor heat exchanger 21, and an indoor temperature sensor 23 detecting a temperature (referred to as an indoor temperature) Ta of the indoor air is arranged in a suction path of the indoor fan 22.
  • the compressor 11, the four-way valve 12, the outdoor heat exchanger 13, the electric expansion valve 14, the outdoor fan 15, and the outside air temperature sensor 16 are accommodated in an outdoor unit 10 together with an outdoor controller 18a, and the indoor unit 21, the indoor fan 22, and the indoor temperature sensor 23 are accommodated in the indoor unit 20 together with an indoor controller 24a.
  • the outdoor controller 18a and the indoor controller 24a are interconnected through a serial signal line 31 synchronous with a power supply voltage, and a remote control-type operator (simply referred to as a remote controller) 33 for the operation and for operating condition setting is connected to the indoor controller 24a through a cable 32.
  • the remote controller 33 is attached onto a wall surface of the air conditioning area or the like and can easily be controlled by the user.
  • the outdoor controller 18a is composed of a microcomputer and peripheral circuits thereof, controls the compressor 11, the four-way valve 12, the electric expansion valve 14, and the outdoor fan 15 in response to instructions from the indoor controller 24a, and sends data such as the detection temperature (referred to as an outside air temperature) To of the outside air temperature sensor 16 and the detection temperature (referred to as a heat exchanger temperature) Te of a heat exchange temperature sensor 17 to the indoor controller 24a by a serial signal line 31.
  • the indoor controller 24a is composed of a microcomputer and peripheral circuits thereof and controls the operation of the air conditioner 1a in accordance with control of the remote controller 33, the operating condition set by the remote controller 33, data transmitted from the outdoor controller 18a, and the like.
  • the indoor controller 24a preliminarily stores defrosting start conditions for the outdoor heat exchanger 13 in an internal memory and executes a defrosting operation for the outdoor heat exchanger 13 when the defrosting start conditions are met.
  • the threshold value A is a value selected depending on an outside air temperature To and, for example, 6°C are selected in a case where To ⁇ 0°C and, for example, 4°C are selected in a case where 0°C > To ⁇ -10°C and, for example, 2°C are selected in a case where To ⁇ -10°C.
  • a bus line 40 for control and for data transmission is connected between the indoor controller 24a and indoor controllers 24b to 24n.
  • Air conditioners 1b to 1n are merely different from the air conditioner 1a with respect to a feature of including outdoor controllers 18b to 24n and the indoor controllers 24b to 24n and the basic structure thereof is the same as that of the air conditioner 1a.
  • the indoor controllers 24b to 24n are composed of microcomputers and peripheral circuits thereof and totally control the operations of the air conditioners in response to the data transmitted from the respective outdoor controllers 18b to 18n and the instruction from the indoor controller 24a.
  • the indoor controllers 24b to 24n preliminarily store defrosting start conditions for the respective outdoor heat exchangers 13 in internal memories, and execute the defrosting operation for the respective outdoor heat exchangers 13 together with the outdoor controllers 18b to 18n when the defrosting start conditions are met.
  • the defrosting start conditions are the same as the defrosting start conditions (first defrosting start condition and second defrosting start condition) of the indoor controller 24a.
  • the air conditioner 1a and the indoor controller 24a function as the master unit which is the center of the control, and the remaining air conditioners 1b to 1n and the indoor controllers 24b to 24n function as slave units following the instructions of the master unit.
  • the indoor controller 24a of the air conditioner 1a comprises a first control section C1, a second control section C2, a third control section C3, and a fourth control section C4 as main functions relating to the linkage of the master unit and the slave units.
  • the first control section C1 executes communication with the indoor controllers 24a to 24n regularly as needed through the data bus line 40. Presence or absence of the defrosting start conditions, the operation state, and the like can be mutually recognized by the master unit and the slave units by this communication.
  • the second control section C2 changes the defrosting start conditions of the air conditioners other than the air conditioner (i.e., the air conditioner where the defrosting start conditions have been met) to the direction of being met later than usual ("later defrosting" mode).
  • the third control section C3 changes the defrosting start conditions of the air conditioner which are changed in the direction of being later to a direction of being met earlier than usual ("earlier defrosting" mode).
  • the fourth control section C4 reduces a rise capacity to restart heating of the air conditioner after the defrosting operation is ended.
  • Steps S1, S2 ... in the flowchart will be simply referred to as S1, S2 ...
  • the indoor controller 24a When the start control of the heating operation is executed with the remote controller 33 (YES in S1), the indoor controller 24a instructs the indoor controllers 24b to 24n to start the heating operation (S2) and instructs the indoor controllers 24b to 24n of a target indoor temperature (also referred to as a setting temperature) Ts set with the remote controller 33 (S3). Then, after the heating operation is started, the indoor controller 24a monitors a "defrosting" notice (i.e., a notice that the defrosting start conditions have been met) of the indoor controller 24a and the indoor controllers 24b to 24n (S4).
  • a "defrosting" notice i.e., a notice that the defrosting start conditions have been met
  • the indoor controller 24a monitors an "end of defrosting" notice (i.e., a notice that the defrosting operation is ended) of the indoor controller 24a and the indoor controller 24b to 24n (S6).
  • the indoor controller 24a monitors a stop control of the remote controller 33 (S8) .
  • the indoor controller 24a When the stop control is not made (NO in S8), the indoor controller 24a returns to S3 and repeats the same processes as those described above. When the stop control is made (YES in S8), the indoor controller 24a indicates the indoor controllers 24b to 24n to stop the heating operation (S9).
  • the indoor controller 24a When the "defrosting" notice is sent from either of the indoor controller 24a and the indoor controllers 24b to 24n in the determination of S4 (YES in S4), the indoor controller 24a notifies all the indoor controllers 24b to 24n that are the slave units of "defrosting” (S5) and shifts to the determination in S8.
  • the indoor controller 24a When the "end of defrosting" notice is sent from either of the indoor controller 24a and the indoor controllers 24b to 24n in the determination of S6 (YES in S6), the indoor controller 24a notifies all the indoor controllers 24b to 24n that are the slave units of the "end of defrosting" notice (S7) and shifts to the determination of S8.
  • FIG. 3 An example of the defrosting operation executed by the air conditioners 1a to 1c and an example on how the defrosting start conditions of the air conditioner 1a are varied with the execution of the defrosting operation of the air conditioners 1a to 1c are shown in FIG. 4 .
  • the indoor controller 24a and the indoor controllers 24b to 24n start the heating operation of each air conditioner (S12) and control each heating capacity (operation frequency F of each compressor 11) in accordance with a difference ⁇ T between the target indoor temperature Ts set with the remote controller 33 and the indoor temperature Ta detected by the indoor temperature sensor 23 (S13).
  • the indoor controller 24b when the defrosting start conditions are met in the indoor controller 24b of the slave unit, the indoor controller 24b notifies the indoor controller 24a of the master unit of "defrosting".
  • the indoor controller 24a of the master unit which receives the "defrosting" notice notifies all the indoor controllers 24b to 24n of the slave units of "defrosting" (YES in S4, and S5).
  • the indoor controller 24a monitors whether a certain time, for example, 40 minutes have elapsed after the start of the heating operation and whether the current heat exchanger temperature Te of the outdoor heat exchanger 13 is lower than a predetermined limit value (for example, -20°C) Tex or not (S21).
  • a predetermined limit value for example, -20°C
  • the indoor controller 24a shifts to determination of the stop instruction of S29 of a subsequent stage.
  • frost of the outdoor heat exchanger 13 may not be able to be removed by executing the defrosting operation and, therefore, the determination of S21 is adopted as the defrosting start condition to deal with such a low outside air temperature environment.
  • the indoor controller 24a starts the defrosting operation of the air conditioner 1a (S22) and notifies all the indoor controllers 24b to 24n of the slave units of "defrosting" (S23) by determining that defrosting for the outdoor heat exchanger 13 is necessary.
  • a high-temperature refrigerant discharged from the compressor 11 is directly supplied to the outdoor heat exchanger 13 through the four-way valve 12 directly, and the frost attached onto the surface of the outdoor heat exchanger 13 is removed by the heat of the high-temperature refrigerant, by the start of the defrosting operation.
  • the indoor controller 24a waits for the end-of-defrosting conditions determined based on, for example, the heat exchanger temperature Te of the outdoor heat exchanger 13 being met (S24).
  • the indoor controller 24a ends the defrosting operation of the air conditioner 1a and notifies all the indoor controllers 24b to 24n of the slave units of "end of defrosting" (S25). Then, since the setting of the "normal defrosting" mode that the reference value Teo and the limit value Tex are not changed continues at this time (YES in S26), the indoor controller 24a bypasses to restart the heating operation without executing a shift cancellation process of next S27 (S28).
  • the indoor controller 24a bypasses to monitor the instruction of stopping the heating operation without executing a capacity reduction process of S30 (S31).
  • the indoor controller 24a returns to S16 and repeats the same processes as those described above.
  • the indoor controller 24a starts the defrosting operation of the air conditioner 1a (S22) and notifies the indoor controllers 24b to 24n of the slave units of "defrosting" (S23) even if the defrosting operation of the air conditioner 1b where the defrosting start conditions have been met earlier and which is in the defrosting operation is still continuing. After the start of the defrosting operation, the indoor controller 24a waits for the end-of-defrosting conditions being met (S24).
  • the indoor controller 24a ends the defrosting operation of the air conditioner 1a and notifies all the indoor controllers 24b to 24n of the slave units of "end of defrosting" (S25). Then, since the reference value Teo and the limit value Tex are changed at this time and the "later defrosting" mode is set (NO in S26), the indoor controller 24a cancels the change of the reference value Teo and the limit value Tex, returns to the normal defrosting mode (S27), and restarts the heating operation (S28).
  • the indoor controller 24a suppresses an operation frequency F of the compressor 11 to approximately 80% of the normal level and reduces the rise capacity to restart heating for a predetermined time (S30).
  • the indoor controller 24a monitors the instruction of stopping the heating operation (S31). When the stop instruction is not sent (NO in S31), the indoor controller 24a shifts to the determination of S16. When the stop instruction is sent (YES in S31), the indoor controller 24a stops the heating operation (S32).
  • the defrosting start conditions of all the air conditioners 1a and 1c to 1n other than the air conditioner 1b are changed to the direction of being met later than usual (-1°C) and, therefore, even if the air conditioner 1b starts the defrosting operation the air conditioners 1a and 1c to 1n do not start the defrosting operation simultaneously. Therefore, decrease in the indoor temperature Ta of the air conditioning area caused by the defrosting can be suppressed as much as possible, and discomfort is not provided to a resident.
  • the indoor controllers 24b to 24n of the slave units may merely notify the indoor controller 24a of the master unit of the "defrosting" notice, and a notice of identification information such as an address indicating which air conditioner is the own air conditioner is unnecessary.
  • the indoor controller 24a of the master unit When receiving the "defrosting" notice from any one of the slave units, the indoor controller 24a of the master unit only transfers the notice to all the slave units, and a notice of the identification information such as the address indicating which air conditioner is the air conditioner where the defrosting start conditions are met is unnecessary.
  • the defrosting start conditions of the air conditioners 1a and 1c to 1n where the "later defrosting" mode is set may be met at the same time as the time when the defrosting start conditions of the air conditioner 1b are met again.
  • the defrosting start conditions of the air conditioners 1a and 1c to 1n where the "later defrosting" mode is set are changed to the direction of being met earlier than usual.
  • the timing of meeting the defrosting start conditions of the air conditioners 1a and 1c to 1n can be shifted to the early time when the defrosting start conditions of the air conditioner 1b restarting heating are met again, by changing the "later defrosting" mode to the "earlier defrosting" mode in the air conditioners 1a and 1c to 1n. That is, the possibility that defrosting of a plurality of air conditioners may start at the same timing can be lowered.
  • the air conditioner 1b where the defrosting start conditions have been met earlier may still be executing the defrosting operation at the timing at which any one of the air conditioners 1a and 1c to 1n in the "later defrosting" mode starts the defrosting operation and, in this case, defrosting operations of the plurality of air conditioners may be executed at the same time.
  • the plurality of air conditioners end the defrosting operations and restart heating, the progress condition of frost of the outdoor heat exchangers 13 of the respective air conditioners may agree and defrosting of the plurality of air conditioners may be started again at the same timing.
  • any one of the air conditioners 1a and 1c to 1n in the "later defrosting" mode start the defrosting operation, ends the defrosting operation, and restarts heating
  • the operation frequency F of the compressor 11 is suppressed to approximately 80% of the normal level and the rise capacity to restart heating is reduced.
  • the progress condition of frost of the outdoor heat exchangers 13 of the respective air conditioners can be made different. That is, the possibility that defrosting of a plurality of air conditioners may start at the same timing can be lowered.
  • the reference value Teo and the limit value Tex of the defrosting start conditions are shifted by -1°C as "later defrosting" mode, and the reference value Teo and the limit value Tex of the defrosting start conditions are shifted by +1°C as the earlier defrosting mode, but the value for shifting is not limited to -1°C, but can be approximately selected in accordance with the capacity of the outdoor heat exchanger 13, the capacity of the the heat-pump-type refrigerating cycle, and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
EP19889376.0A 2018-11-29 2019-11-28 Dispositif de climatisation Pending EP3889522A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018223498 2018-11-29
PCT/JP2019/046651 WO2020111200A1 (fr) 2018-11-29 2019-11-28 Dispositif de climatisation

Publications (2)

Publication Number Publication Date
EP3889522A1 true EP3889522A1 (fr) 2021-10-06
EP3889522A4 EP3889522A4 (fr) 2022-08-10

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EP19889376.0A Pending EP3889522A4 (fr) 2018-11-29 2019-11-28 Dispositif de climatisation

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EP (1) EP3889522A4 (fr)
JP (1) JP7098751B2 (fr)
CN (1) CN113167518B (fr)
WO (1) WO2020111200A1 (fr)

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JP7034227B1 (ja) 2020-09-30 2022-03-11 日立ジョンソンコントロールズ空調株式会社 空気調和機及び管理装置

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JP5590195B1 (ja) * 2013-07-11 2014-09-17 株式会社富士通ゼネラル 空気調和装置
JP5574028B1 (ja) * 2013-07-31 2014-08-20 株式会社富士通ゼネラル 空気調和装置
JPWO2018042611A1 (ja) * 2016-09-02 2019-04-18 三菱電機株式会社 冷凍空調システムおよびシステムコントローラ
CN108731321B (zh) * 2017-04-25 2020-04-24 同方人工环境有限公司 一种空气源热泵系统的除霜控制方法

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JPWO2020111200A1 (ja) 2021-09-27
EP3889522A4 (fr) 2022-08-10
CN113167518A (zh) 2021-07-23
JP7098751B2 (ja) 2022-07-11
WO2020111200A1 (fr) 2020-06-04

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