EP3399250A1 - Système inter-relié et son procédé de commande - Google Patents

Système inter-relié et son procédé de commande Download PDF

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Publication number
EP3399250A1
EP3399250A1 EP17852265.2A EP17852265A EP3399250A1 EP 3399250 A1 EP3399250 A1 EP 3399250A1 EP 17852265 A EP17852265 A EP 17852265A EP 3399250 A1 EP3399250 A1 EP 3399250A1
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EP
European Patent Office
Prior art keywords
indoor unit
air conditioning
conditioning system
split air
priority level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17852265.2A
Other languages
German (de)
English (en)
Other versions
EP3399250B1 (fr
EP3399250A4 (fr
Inventor
Qihui BU
Yongfeng XU
Boqi LIANG
Hongwei Li
Shilong DONG
Xiaohong Wu
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.)
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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 Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Publication of EP3399250A1 publication Critical patent/EP3399250A1/fr
Publication of EP3399250A4 publication Critical patent/EP3399250A4/fr
Application granted granted Critical
Publication of EP3399250B1 publication Critical patent/EP3399250B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/54—Heating and cooling, simultaneously or alternatively
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
    • 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

  • the present disclosure relates to air conditioner field, and more particularly, to a multi-split air conditioning system and a method for controlling a multi-split air conditioning system.
  • a multi-split air conditioning system is a system that uses a single or multiple outdoor units in parallel, and configures a plurality of air conditioning indoor units.
  • the indoor units are independently controlled, and general operating modes include refrigerating, heating, air supply, etc.
  • the outdoor units can only operate in one mode, and cannot operate in refrigerating and heating mode at the same time. Since the body sense of each person may vary, in the transitional season, there may be cases that some people may want to start refrigerating and others may want to start heating. In this case, it is necessary to set a mode priority for the air conditioning system, and the system operates this mode first.
  • priority modes of each air conditioning manufacturer generally include a refrigerating priority or a heating priority. However, the priority modes have certain limitations, and cannot meet needs of most users, user experience is poor.
  • An objective of the present disclosure is to provide a multi-split air conditioning system and a method for controlling thereof, which aims to avoid conflicts in operating modes of multi-split air conditioning systems.
  • the present disclosure provides a method for controlling a multi-split air conditioning system, including: acquiring an outdoor ambient temperature when receiving a starting instruction of an indoor unit; determining whether the outdoor ambient temperature is within a preset temperature range; and determining an operating mode of the multi-split air conditioning system according to operating conditions of respective started indoor units, when the outdoor ambient temperature is within the preset temperature range.
  • determining the operating mode of the multi-split air conditioning system according to the operating conditions of respective started indoor units when the outdoor ambient temperature is within the preset temperature range comprises: determining whether there is a started indoor unit, when the outdoor ambient temperature is within the preset temperature range; determining whether the indoor unit sending the starting instruction has the highest priority level, when there is the started indoor unit; and determining the operating mode of the multi-split air conditioning system according to an operating mode set by the indoor unit sending the starting instruction when the indoor unit sending the starting instruction has the highest priority level, and determining the operating mode of the multi-split air conditioning system according to the operating mode of the started indoor unit when the indoor unit sending the starting instruction does not have the highest priority level.
  • the method further comprises: determining whether there are at least two indoor units sending the starting instruction, when there is no started indoor unit; and when there are at least two indoor units sending the starting instruction, determining the operating mode of the multi-split air conditioning system through a priority level rule or a majority rule according to the number of indoor units and set operating modes thereof.
  • the method further includes: when receiving a mode switching instruction sent by the indoor unit, determining whether the indoor unit sending the mode switching instruction has the highest priority level; when the indoor unit sending the mode switching instruction does not have the highest priority level, forwarding the mode switching instruction to the indoor unit having the highest priority level, and switching the operating mode of the multi-split air conditioning system when receiving confirmation from the indoor unit having the highest priority level; and when the indoor unit sending the mode switching instruction has the highest priority level, switching the current operating mode of the multi-split air conditioning system according to the mode switching instruction.
  • the method further includes: stopping operating of the indoor unit for a preset time period and then starting the indoor unit again, when a current indoor temperature corresponding to the indoor unit reaches a target temperature.
  • the method further includes: controlling the multi-split air conditioning system to operate in a heating mode when the outdoor ambient temperature is less than a lower limit of the preset temperature range; and controlling the multi-split air conditioning system to operate in a refrigerating mode when the outdoor ambient temperature is greater than an upper limit of the preset temperature range.
  • the present disclosure further provides a multi-split air conditioning system, including at least one outdoor unit and at least two indoor units.
  • the at least two indoor units and the at least one outdoor unit form a refrigerant cycle loop and communicate with each other.
  • the outdoor unit comprises a controller configured to receive a control signal from the indoor unit and control the outdoor unit according to the control signal.
  • the controller comprises: a temperature acquiring module, configured to acquire an outdoor ambient temperature when receiving a starting instruction of the indoor unit; a temperature determining module, configured to determine whether the outdoor ambient temperature is within a preset temperature range; and a control module, configured to determine an operating mode of the multi-split air conditioning system according to operating conditions of respective started indoor units when the outdoor ambient temperature is within the preset temperature range.
  • control module is further configured to: determine whether there is a started indoor unit when the outdoor ambient temperature is within the preset temperature range; determine whether the indoor unit sending the starting instruction has a highest priority level when there is the started indoor unit; and determine the operating mode of the multi-split air conditioning system according to an operating mode set by the indoor unit sending the starting instruction when the indoor unit sending the starting instruction has the highest priority level, and determine the operating mode of the multi-split air conditioning system according to the operating mode of the started indoor unit when the indoor unit sending the starting instruction does not have the highest priority level.
  • control module is further configured to determine whether there are at least two indoor units sending the starting instruction when there is no started indoor unit; and when there are at least two indoor units sending the starting instruction, determine the operating mode of the multi-split air conditioning system through a priority level rule or a majority rule according to the number of indoor units and set operating modes thereof.
  • control module is further configured to: when receiving a mode switching instruction sent by the indoor unit, determine whether the indoor unit sending the mode switching instruction has the highest priority level; when the indoor unit sending the mode switching instruction does not have the highest priority level, forward the mode switching instruction to the indoor unit having the highest priority level, and switch the operating mode of the multi-split air conditioning system when receiving confirmation from the indoor unit having the highest priority level; and when the indoor unit sending the mode switching instruction has the highest priority level, switch the current operating mode of the multi-split air conditioning system according to the mode switching instruction.
  • control module is further configured to: stop operating of the indoor unit for a preset time period and then start the indoor unit again, when a current indoor temperature corresponding to the indoor unit reaches a target temperature.
  • control module is further configured to: control the multi-split air conditioning system to operate in a heating mode when the outdoor ambient temperature is less than a lower limit of the preset temperature range; and control the multi-split air conditioning system to operate in a refrigerating mode when the outdoor ambient temperature is greater than a upper limit of the preset temperature range.
  • the multi-split air conditioning system when the multi-split air conditioning system is operating, it is determined whether the outdoor ambient temperature is in a transitional season. When the outdoor ambient temperature is in the transitional season, operating conditions of respective indoor units are obtained, and the operating mode of the multi-split air conditioning system is determined based on the operating conditions of respective indoor units, thereby avoiding conflicts in operating modes of multi-split air conditioning systems.
  • directional indications such as up, down, left, right, front, rear, etc.
  • the directional indications are only used to explain relative positional relationships and movement between various components in a specific posture (as illustrated in the drawing). If the specific posture changes, the directional indications may also change accordingly.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature.
  • technical solutions between various embodiments can be combined with each other, but must be based on the implementation of those skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of such technical solutions does not exist, and is not within the protection scope claimed by the present disclosure.
  • the present disclosure provides a method for controlling a multi-split air conditioning system, which solves conflicts in operating modes of multi-split air conditioning systems that, when the multi-split air conditioning system is used in a transitional season, some people want the indoor unit to operate in a refrigerating mode, and others want the indoor unit to operate in a heating mode, the ambient temperature is divided, operations in the transitional season are separately controlled and conflicts of operating modes are avoided.
  • Fig. 1 illustrates a structure of a multi-split air conditioning system according to an embodiment of the present disclosure.
  • the multi-split air conditioning system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a first throttling element 4, a second throttling element and an indoor heat exchanger.
  • the indoor heat exchanger includes a plurality of indoor heat change units, such as a first indoor heat exchange unit 6a and a second indoor heat exchange unit 6b illustrated in Fig. 1 .
  • the second throttling element includes a first electronic expansion valve 5a and a second electronic expansion valve 5b.
  • the four-way valve 2 includes four ports, i.e., a first port a, a second port b, a third port c and a fourth port d.
  • An exhaust port of the compressor 1 is connected with the first port a of the four-way valve 2 with a refrigerant line, and a one-way valve is provided at the exhaust port of the compressor to prevent refrigerant reflux.
  • a gas returning port of the compressor 1 is connected with the third port c of the four-way valve 2 with a refrigerant line.
  • the multi-split air conditioning system may further include a gas-liquid separator 9, i.e., gas-liquid separation is performed on the refrigerant returned to the compressor 1, to prevent liquid refrigerant from flowing into the compressor 1.
  • the third port c of the four-way valve 2 is connected with an inlet of the gas-liquid separator 9, and an outlet of the gas-liquid separator 9 is connected with the gas returning port of the compressor 1 with the refrigerant line.
  • An end of the outdoor heat exchanger 3 is connected with the second port b of the four-way valve 2 with a refrigerant line, and the other end of the outdoor heat exchanger 3 is connected with an end of the first throttling element 4 with a refrigerant line.
  • the other end of the first throttling element 4 is connected with an end of the indoor heat exchanger, i.e., is connected with an end of the first indoor exchange unit 6a and an end of the second indoor heat exchange unit 6b.
  • the other end of the indoor heat exchanger is connected with the four port d of the four-way valve 2 with a refrigerant line, i.e., the other end of the first indoor heat exchange unit 6a and the other end of the second indoor heat exchange unit 6b are connected with the four port d of the four-way valve 2 after joining with the refrigerant line.
  • a high-pressure valve 7 is provided on the refrigerant line that connects the first throttling element 4 and an end of the indoor heat exchanger.
  • a low-pressure 8 is provided on the refrigerant line that connects with the other end of the indoor heat exchanger and the four-way valve 2.
  • the present disclosure provides a method for controlling a multi-split air conditioning system. As illustrated in Fig. 2 , the method may include followings.
  • an outdoor ambient temperature is acquired when a starting instruction of an indoor unit is received.
  • the user When the user wants to start the indoor unit to adjust the temperature (such as increase temperature or decrease temperature) in the area where the indoor unit is located, the user may send a starting instruction, and set a target indoor temperature and an operating mode (such as a refrigerating mode, a heating mode, etc.).
  • the indoor unit receives the starting instruction sent by the user, and sends the starting instruction to the outdoor unit.
  • the outdoor unit acquires the outdoor ambient temperature based on the starting instruction of the indoor unit.
  • a temperature range i.e., a temperature range of the transitional season (such as 22°C to 28°C)
  • a temperature range of the transitional season such as 22°C to 28°C
  • the air conditioning system is controlled to operate in the heating mode.
  • the outdoor ambient temperature is greater than 28°C
  • the air conditioning system is controlled to operate in the refrigerating mode.
  • an operating mode of the multi-split air conditioning system is determined according to operating conditions of respective started indoor units.
  • the multi-split air conditioning system When the outdoor ambient temperature is within the preset temperature range, operating conditions of respective indoor units are obtained, and the operating mode of the multi-split air conditioning system is determined through a preset rule according to the operating conditions of respective indoor units.
  • the multi-split air conditioning system may operate in a refrigerating mode, or may operate in a heating mode.
  • the operating condition may include an operating state (such as on or off) of the indoor unit, and an operating mode (such as a refrigerating mode, a heating mode, etc.) of the indoor unit.
  • the multi-split air conditioning system when the multi-split air conditioning system is operating, it is determined whether the outdoor ambient temperature is in the transitional season, when the outdoor ambient temperature is in the transitional season, operating conditions of respective indoor units are obtained, and the operating mode of the multi-split air conditioning system is determined based on the operating conditions of respective indoor units, thereby avoiding conflicts in operating modes of multi-split air conditioning systems.
  • block S130 may include followings.
  • the outdoor unit may communicate with the indoor unit to inform its respective operating state.
  • the operating condition of the indoor unit can be obtained by querying the outdoor unit, such that it can be determined whether there is the started indoor unit.
  • the indoor units may be numbered in advance, such as indoor unit 1, indoor unit 2, indoor unit 3, etc.
  • a priority level may be set for each indoor unit, and a priority level table can be defined. Therefore, based on the preset priority level table, when it is determined that there is the started indoor unit, the priority level of the started indoor unit may be compared with that of the indoor unit sending the starting instruction, to determine whether the indoor unit sending the starting instruction has the highest priority level.
  • the operating mode of the multi-split air conditioning system is determined according to an operating mode set by the indoor unit sending the starting instruction, and otherwise the operating mode of the multi-split air conditioning system is determined according to the operating mode of the started indoor unit.
  • the operating mode of the multi-split air conditioning system is determined according to the operating mode set by the starting instruction. For example, when the indoor unit sending the starting instruction is in the refrigerating mode, the multi-split air conditioning system is currently operating in the heating mode, and then the current heating mode is switched to the refrigerating mode.
  • the indoor unit sending the starting instruction does not have the highest priority level, i.e., one of the started indoor units has the highest priority level, no operation is performed, and the multi-split air conditioning system operates in the current operating mode.
  • the multi-split air conditioning system When there is no started indoor unit, it is indicated that the multi-split air conditioning system is not in the operating state. It is determined whether there is one or more indoor units sending the starting instruction. When there is only one indoor unit sending the starting instruction, the operation of the multi-split air conditioning system is controlled based on the operating mode set by the starting instruction. When there are more than two indoor units sending the starting instruction, the operating mode of the multi-split air conditioning system is determined through a priority level rule or a majority rule based on set operating modes of respective indoor units.
  • the operating mode of the multi-split air conditioning system is determined through a priority level rule or a majority rule according to the number of indoor units and set operating modes thereof.
  • the majority rule refers to that, according to the number of indoor units sending the same starting instruction and the same operating modes set by respective indoor units, the operating mode of the multi-split air conditioning system is determined by the operating mode set by most of the indoor units.
  • the indoor units sending the starting instruction include an indoor unit 1, an indoor unit 2 and an indoor unit 4, the operating mode set by the indoor unit 1 is the refrigerating mode, the operating mode set by the indoor unit 2 is the heating mode, and the operating mode set by the indoor unit 4 is the refrigerating mode, and then the final operating mode of the multi-split air conditioning system is the refrigerating mode according to the majority rule.
  • the method further includes followings.
  • the mode switching instruction is forwarded to the indoor unit having the highest priority level, and the operating mode of the multi-split air conditioning system is switched when confirmation from the indoor unit having the highest priority level is received.
  • the user may want to switch the current operating mode (for example, switch the refrigerating mode to the heating mode), after the indoor unit receives the mode switching instruction, the indoor unit can send it to the outdoor unit.
  • the outdoor unit may first determine whether the indoor unit sending the mode switching instruction has the highest priority level. When the indoor unit sending the mode switching instruction has the highest priority level, the current operating mode of the multi-split air conditioning system is switched according to the mode switching instruction. When the indoor unit sending the mode switching instruction does not have the highest priority level, the mode switching instruction is forwarded to the indoor unit having the highest priority level to confirm. It should be noted that, the above comparison of the priority level is to compare the priority level of the indoor unit sending the mode switching instruction to that of the started indoor unit.
  • the method further includes followings.
  • the indoor unit may further detect the current indoor temperature corresponding to the indoor unit.
  • the indoor temperature may be detected by a temperature sensor provided at a return air inlet of the indoor unit.
  • the indoor unit is controlled to stop operating for a time period, and then the indoor unit is started again.
  • the multi-split air conditioning system may obtain operating conditions of remaining indoor units to re-determine the operating mode of the multi-split air conditioning system.
  • inventions of the present disclosure further provide a multi-split air conditioning system for performing the above method.
  • the multi-split air conditioning system includes the structure illustrated in Fig. 1 , and further includes a controller.
  • the controller is configured to receive a control signal from the indoor unit and control the outdoor unit according to the control signal.
  • the controller includes a temperature acquiring module 110, a temperature determining module 120 and a control module 130.
  • the temperature acquiring module 110 is configured to acquire an outdoor ambient temperature when receiving a starting instruction of the indoor unit.
  • the temperature determining module 120 is configured to determine whether the outdoor ambient temperature is within a preset temperature range.
  • the control module 130 is configured to determine an operating mode of the multi-split air conditioning system according to operating conditions of respective started indoor units when the outdoor ambient temperature is within the preset temperature range.
  • the user can may a starting instruction, and set a target indoor temperature and an operating mode (such as a refrigerating mode, a heating mode, etc.).
  • the indoor unit receives the starting instruction sent by the user, and sends the starting instruction to the outdoor unit.
  • the temperature acquiring module 110 acquires the outdoor ambient temperature based on the starting instruction of the indoor unit.
  • a temperature range i.e., a temperature range of the transitional season (such as 22°C to 28°C)
  • a temperature range of the transitional season such as 22°C to 28°C
  • the air conditioning system is controlled to operate in the heating mode.
  • the outdoor ambient temperature is greater than 28°C
  • the air conditioning system is controlled to operate in the refrigerating mode.
  • the multi-split air conditioning system When the outdoor ambient temperature is within the preset temperature range, operating conditions of respective indoor units are obtained, and the operating mode of the multi-split air conditioning system is determined through a preset rule according to the operating conditions of respective indoor units.
  • the multi-split air conditioning system may operate in a refrigerating mode, or may operate in a heating mode.
  • the operating condition may include an operating state (such as on or off) of the indoor unit, and an operating mode (such as a refrigerating mode, a heating mode, etc.) of the indoor unit.
  • the outdoor ambient temperature is in the transitional season, when the outdoor ambient temperature is in the transitional season, operating conditions of respective indoor units are obtained, and the operating mode of the multi-split air conditioning system is determined based on the operating conditions of respective indoor units, thereby avoiding conflicts in operating modes of multi-split air conditioning systems.
  • control module 130 in the controller is further configured to determine whether there is a started indoor unit when the outdoor ambient temperature is within the preset temperature range; determine whether the indoor unit sending the starting instruction has a highest priority level when there is the started indoor unit; and determine the operating mode of the multi-split air conditioning system according to an operating mode set by the indoor unit sending the starting instruction when the indoor unit sending the starting instruction has the highest priority level, and determine the operating mode of the multi-split air conditioning system according to the operating mode of the started indoor unit when the indoor unit sending the starting instruction does not have the highest priority level.
  • the outdoor unit may communicate with the indoor unit to inform its respective operating state.
  • the operating condition of the indoor unit can be obtained by querying the outdoor unit, such that it can be determined whether there is the started indoor unit.
  • the indoor units may be numbered in advance, such as indoor unit 1, indoor unit 2, indoor unit 3, etc.
  • a priority level may be set for each indoor unit, and a priority level table can be defined. Therefore, based on the preset priority level table, when it is determined that there is the started indoor unit, the priority level of the started indoor unit may be compared with that of the indoor unit sending the starting instruction, to determine whether the indoor unit sending the starting instruction has the highest priority level.
  • the operating mode of the multi-split air conditioning system is determined according to the operating mode set by the starting instruction. For example, when the indoor unit sending the starting instruction is in the refrigerating mode, the multi-split air conditioning system is currently operating in the heating mode, and then the current heating mode is switched to the refrigerating mode.
  • the indoor unit sending the starting instruction does not have the highest priority level, i.e., one of the started indoor units has the highest priority level, no operation is performed, and the multi-split air conditioning system operates in the current operating mode.
  • control module 130 is further configured to determine whether there are at least two indoor units sending the starting instruction when there is no started indoor unit; and when there are at least two indoor units sending the starting instruction, determine the operating mode of the multi-split air conditioning system through a priority level rule or a majority rule according to the number of indoor units and set operating modes thereof.
  • the multi-split air conditioning system When there is no started indoor unit, it is indicated that the multi-split air conditioning system is not in the operating state. It is determined whether there is one or more indoor units sending the starting instruction. When there is only one indoor unit sending the starting instruction, the operation of the multi-split air conditioning system is controlled based on the operating mode set by the starting instruction. When there are more than two indoor units sending the starting instruction, the operating mode of the multi-split air conditioning system is determined through a priority level rule or a majority rule based on set operating modes of respective indoor units.
  • the majority rule refers to that, according to the number of indoor units sending the same starting instruction and the same operating modes set by respective indoor units, the operating mode of the multi-split air conditioning system is determined by the operating mode set by most of the indoor units.
  • the indoor units sending the starting instruction include an indoor unit 1, an indoor unit 2 and an indoor unit 4, the operating mode set by the indoor unit 1 is the refrigerating mode, the operating mode set by the indoor unit 2 is the heating mode, and the operating mode set by the indoor unit 4 is the refrigerating mode, and then the final operating mode of the multi-split air conditioning system is the refrigerating mode according to the majority rule.
  • control module 130 is further configured to, when receiving a mode switching instruction sent by the indoor unit, determine whether the indoor unit sending the mode switching instruction has the highest priority level; when the indoor unit sending the mode switching instruction does not have the highest priority level, forward the mode switching instruction to the indoor unit having the highest priority level, and switch the operating mode of the multi-split air conditioning system when receiving confirmation from the indoor unit having the highest priority level; and when the indoor unit sending the mode switching instruction has the highest priority level, switch the current operating mode of the multi-split air conditioning system according to the mode switching instruction.
  • the user may want to switch the current operating mode (for example, switch the refrigerating mode to the heating mode), after the indoor unit receives the mode switching instruction, the indoor unit can send it to the outdoor unit.
  • the outdoor unit may first determine whether the indoor unit sending the mode switching instruction has the highest priority level. When the indoor unit sending the mode switching instruction has the highest priority level, the current operating mode of the multi-split air conditioning system is switched according to the mode switching instruction. When the indoor unit sending the mode switching instruction does not have the highest priority level, the mode switching instruction is forwarded to the indoor unit having the highest priority level to confirm. It should be noted that, the above comparison of the priority level is to compare the priority level of the indoor unit sending the mode switching instruction to that of the started indoor unit.
  • control module 130 is further configured to stop operating of the indoor unit for a preset time period and then start the indoor unit again, when a current indoor temperature corresponding to the indoor unit reaches a target temperature.
  • the indoor unit may further detect the current indoor temperature corresponding to the indoor unit.
  • the indoor temperature may be detected by a temperature sensor provided at a return air inlet of the indoor unit.
  • the indoor unit is controlled to stop operating for a time period, and then the indoor unit is started again.
  • the multi-split air conditioning system may obtain operating conditions of remaining indoor units to re-determine the operating mode of the multi-split air conditioning system.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Selective Calling Equipment (AREA)
  • Radio Relay Systems (AREA)
EP17852265.2A 2016-09-21 2017-08-28 Système inter-relié et son procédé de commande Active EP3399250B1 (fr)

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CN201610840220.4A CN106403183B (zh) 2016-09-21 2016-09-21 多联机系统及其控制方法
PCT/CN2017/099277 WO2018054196A1 (fr) 2016-09-21 2017-08-28 Système inter-relié et son procédé de commande

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CA3011765A1 (fr) 2018-03-29
KR20180099871A (ko) 2018-09-05
WO2018054196A1 (fr) 2018-03-29
US20190056139A1 (en) 2019-02-21
EP3399250A4 (fr) 2019-04-24
CN106403183B (zh) 2019-04-19
KR102179455B1 (ko) 2020-11-18
ES2919327T3 (es) 2022-07-26
CN106403183A (zh) 2017-02-15

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