WO2018054196A1 - 多联机系统及其控制方法 - Google Patents

多联机系统及其控制方法 Download PDF

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Publication number
WO2018054196A1
WO2018054196A1 PCT/CN2017/099277 CN2017099277W WO2018054196A1 WO 2018054196 A1 WO2018054196 A1 WO 2018054196A1 CN 2017099277 W CN2017099277 W CN 2017099277W WO 2018054196 A1 WO2018054196 A1 WO 2018054196A1
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WO
WIPO (PCT)
Prior art keywords
indoor unit
line system
mode
indoor
ambient temperature
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.)
Ceased
Application number
PCT/CN2017/099277
Other languages
English (en)
French (fr)
Inventor
卜其辉
许永锋
梁伯启
李宏伟
董世龙
吴晓鸿
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
Priority to KR1020187022461A priority Critical patent/KR102179455B1/ko
Priority to EP17852265.2A priority patent/EP3399250B1/en
Priority to ES17852265T priority patent/ES2919327T3/es
Priority to CA3011765A priority patent/CA3011765A1/en
Publication of WO2018054196A1 publication Critical patent/WO2018054196A1/zh
Priority to US16/169,792 priority patent/US20190056139A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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 invention relates to the field of air conditioning, in particular to a multi-line system and a control method thereof.
  • the main object of the present invention is to propose a multi-line system and a control method thereof, aiming at avoiding conflicts in the operation mode of the multi-line system.
  • a control method for a multi-line system proposed by the present invention includes the following steps:
  • the operation mode of the multi-line system is determined according to the operation state of each indoor unit that is turned on.
  • the determining the operating mode of the multi-line system according to the operating conditions of each indoor unit comprises:
  • the operating mode of the multi-line system is determined according to the operating mode set by the indoor unit that issues the opening command; otherwise, the operating mode of the indoor unit that is turned on determines the multi-line system. Operating mode.
  • the step of determining whether there is an open indoor unit further comprises:
  • the operation mode of the multi-line system is determined according to the priority level or the multiple open priority rule according to the number of indoor units and the set operation mode.
  • control method further includes:
  • control method further includes:
  • the indoor unit is stopped after the preset time is stopped.
  • control method further includes:
  • the multi-line system is controlled to operate the cooling mode.
  • the present invention further provides a multi-line system including at least one outdoor unit and at least two indoor units, and a refrigerant circulation loop is formed between the indoor unit and the outdoor unit; and between the indoor unit and the outdoor unit Communicating with each other, the outdoor unit includes a controller, receives a control signal of the indoor unit, and controls the operation of the outdoor unit according to the control signal; the controller includes:
  • a temperature acquiring module configured to acquire an outdoor ambient temperature when receiving an opening instruction of the indoor unit
  • a temperature judging module configured to determine whether the outdoor ambient temperature is in a preset temperature interval
  • the control module is configured to determine an operation mode of the multi-line system according to the running condition of each indoor unit when the outdoor ambient temperature is in a preset temperature range.
  • control module is further configured to: determine whether there is an indoor unit that is turned on when the outdoor ambient temperature is in a preset temperature interval; and determine an priority of the indoor unit that issues the opening command when there is an indoor unit that is turned on Is the rating the most High; when the priority of the indoor unit that issues the opening command is the highest, the operating mode of the multi-line system is determined according to the operating mode set by the indoor unit that issued the opening command; otherwise, the multi-line is determined according to the operating mode of the opened indoor unit. The operating mode of the system.
  • control module is further configured to: when there is no indoor unit that is turned on, determine that at least two indoor units that issue an opening command; and when at least two indoor units that issue an opening instruction, according to the indoor unit
  • the number of units and their set operation mode determine the operation mode of the multi-line system according to the priority level or the multiple open priority rule.
  • control module is further configured to: when receiving the mode switching instruction issued by the indoor unit, determine whether the priority level of the indoor unit that issues the mode switching instruction is the highest; when the priority level of the indoor unit that issues the mode switching instruction is not At the highest time, the mode switching instruction is forwarded to the indoor unit with the highest priority, and when the confirmation of the indoor unit is received, the operation mode of the multi-line system is switched; when the indoor unit that issues the mode switching instruction has the highest priority At this time, the current operation mode of the multi-line system is switched according to the mode switching instruction.
  • control module is further configured to: when the current indoor temperature corresponding to the indoor unit reaches the target set temperature, stop the indoor unit to operate for a preset time and then turn on the indoor unit.
  • control module is further configured to:
  • FIG. 1 is a schematic structural diagram of an embodiment of a multiple online system according to the present invention.
  • FIG. 2 is a schematic flow chart of a first embodiment of a method for controlling a multi-line system according to the present invention
  • FIG. 3 is a schematic diagram showing the steps of refining the operation mode of the multi-line system in the control method of the multi-line system of the present invention
  • FIG. 4 is a schematic flow chart of a second embodiment of a method for controlling a multi-line system according to the present invention.
  • FIG. 5 is a schematic flow chart of a third embodiment of a method for controlling a multi-line system according to the present invention.
  • FIG. 6 is a schematic diagram of functional modules of a controller of a multi-line system of the present invention.
  • Label name Label name 1 compressor 2 Four-way valve 3 Outdoor heat exchanger 4 First throttling element 5a First electronic expansion valve 5b Second electronic expansion valve 6a First indoor heat exchange unit 6b Second indoor heat exchange unit 7 High pressure valve 8 Low pressure valve 9 Gas-liquid separator
  • first”, “second”, etc. in the embodiments of the present invention, the description of the "first”, “second”, etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the invention provides a control method for a multi-line system, which mainly solves the problem that when a multi-line air-conditioning system is used in a transitional season, some people want the indoor unit to operate in a cooling mode, and others hope that the indoor unit operates in a heating mode to cause a multi-line system operation.
  • Pattern conflicts divide the ambient temperature to allow for separate control of the transitional season to avoid conflicts in operating modes.
  • the multi-line system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a first throttle member 4, a second throttle member, and an indoor heat exchanger.
  • the indoor heat exchanger may include a plurality of indoor heat exchange units, such as the first indoor heat exchange unit 6a and the second indoor heat exchange unit 6b shown in FIG.
  • the corresponding second throttle member also includes a first electronic expansion valve 5a and a second electronic expansion valve 5b.
  • the four-way valve 2 has four ports, namely a first port a, a second port b, a third port c, and a fourth port d.
  • the exhaust port of the compressor 1 is respectively communicated with the first port a of the four-way valve 2 through the refrigerant line, and a check valve may be disposed at the exhaust port of the compressor to prevent the refrigerant from flowing back at the exhaust port.
  • the return port of the compressor 1 communicates with the third port c of the four-way valve 2 through the refrigerant line, respectively.
  • the multi-line system may further include a gas-liquid separator 9, that is, the refrigerant returning to the compression 1 is subjected to gas-liquid separation to prevent the liquid refrigerant from entering the compressor 1.
  • the third port c of the four-way valve 2 communicates with the inlet of the gas-liquid separator 9, and the outlet of the gas-liquid separator 9 is further communicated with the return port of the compressor 1 through the refrigerant line.
  • One end of the outdoor heat exchanger 3 communicates with the second port b of the four-way valve 2 through a refrigerant pipe, and the other end of the outdoor heat exchanger 3 communicates with one end of the first throttle member 4 through a refrigerant pipe.
  • the other end of the first throttle member 4 is in communication with one end of the indoor heat exchanger. That is, it is in communication with one end of the first indoor heat exchange unit 6a and one end of the second indoor heat exchange unit 6b.
  • the other end of the indoor heat exchanger is in communication with the fourth port d of the four-way valve 2 through the refrigerant line. That is, the other end of the first indoor heat exchange unit 6a and the other end of the second indoor heat exchange unit 6b are joined by the refrigerant pipe, and then communicate with the fourth port d of the four-way valve 2, respectively.
  • the first throttle member 4 is provided with a high pressure valve 7 on a refrigerant line that communicates with one end of the indoor heat exchanger.
  • a low pressure valve 8 is disposed on the refrigerant line communicating with the four-way valve 2 at the other end of the indoor heat exchanger.
  • the present invention proposes a control method for a multi-line system.
  • the control method may include:
  • Step S110 when receiving an opening instruction of the indoor unit, acquiring an outdoor ambient temperature
  • an opening command can be issued, and the indoor target temperature and the operation mode, such as the cooling mode, the heating mode, and the like, can be set.
  • the indoor unit receives an open command issued by the user and transmits the open command to the outdoor unit.
  • the outdoor unit obtains the outdoor ambient temperature according to the opening instruction of the indoor unit.
  • a temperature range that is, a temperature range of the transitional season, for example, 22 to 28 ° C is preset.
  • the outdoor ambient temperature is within the temperature range, it indicates that it is currently in a transitional season; when the outdoor ambient temperature is less than 22 °C, the air conditioning system is controlled to operate in a heating mode; when the outdoor ambient temperature is greater than 28 °C, the air conditioning system is controlled to operate. Cooling mode.
  • Step S130 When the outdoor ambient temperature is in a preset temperature interval, determine an operation mode of the multi-line system according to the operation condition of each indoor unit.
  • the operation status of each indoor unit is obtained, and according to the operation condition of each indoor unit, the operation mode of the multi-line system is determined according to a preset determination rule. That is, it is possible to run the cooling mode or the heating mode.
  • the operating conditions include operating states of the indoor unit, such as opening or closing, and operating modes of the indoor unit, such as a cooling mode, a heating mode, and the like.
  • the multi-line system when the multi-line system is running, it is determined whether the outdoor ambient temperature is in a transitional season. When the outdoor ambient temperature is in a transitional season, the operation status of each indoor unit is obtained, and the operation of each indoor unit is integrated. Determine the operating mode of the multi-line system, thus avoiding the operating mode conflicts of the multi-line system.
  • step S130 includes:
  • the outdoor unit Since the multi-line system is running, the outdoor unit will communicate with the indoor unit to inform each other's operating status. That is, when the outdoor ambient temperature is in the preset temperature range, by querying the outdoor unit, the opening condition of the indoor unit can be obtained, thereby judging whether there is an indoor unit that has been turned on.
  • Step S132 When there is an indoor unit that is turned on, it is determined whether the priority level of the indoor unit that issues the opening command is the highest;
  • each indoor unit is numbered in advance, for example, an indoor unit 1, an indoor unit 2, an indoor unit 3, ....
  • the priority levels are set for each indoor unit, and a priority level table is formed. Therefore, based on the preset level situation table, when it is determined that there is an indoor unit that has been turned on, the priority level of the opened indoor unit is compared with the priority level of the indoor unit that issues the opening command, and the indoor unit that issues the opening command is determined. Is the highest priority?
  • the operation mode of the multi-line system will be determined according to the operation mode set by the open command. For example, if the indoor unit that issues the open command is in the cooling mode and the multi-line system is currently in the heating mode, the current heating mode is switched to the cooling mode.
  • Step S134 when there is no indoor unit that is turned on, it is determined whether at least two indoor units that issue the opening instruction are;
  • the multi-connection system When there is no indoor unit that is turned on, it indicates that the multi-connection system is currently in an inoperative state, that is, whether the indoor unit that issued the opening command is one or more.
  • the indoor unit that issues the opening command is one
  • the multi-line system operation is controlled directly according to the operation mode set by the opening command.
  • the units are integrated.
  • the operation mode setting of the internal machine determines the operation mode of the multi-line system according to the priority level or the multiple opening priority rules.
  • step S135 when there are at least two indoor units that issue an open command, the operation mode of the multi-line system is determined according to the priority level or the multiple open priority rule according to the number of indoor units and the set operation mode.
  • the operation mode of the multi-line system is determined according to the priority rule, which can be referred to as described above.
  • the multi-open priority rule is to determine the operation mode of the multi-line system according to the number of indoor units that issue the open command and the operation mode set by each indoor unit.
  • the indoor units that issue the opening command are the indoor unit 1, the indoor unit 2, and the indoor unit 4, and the operation mode set by the indoor unit 1 is the cooling mode, and the operation mode set by the indoor unit 2 is the heating mode, and the indoor unit 4
  • the set operation mode is the cooling mode
  • the multi-on priority rule is pressed, and the final operation mode of the multi-line system is the cooling mode.
  • control method further includes:
  • Step S140 after determining the operation mode of the multi-line system, when receiving the mode switching instruction issued by the indoor unit, determining whether the priority level of the indoor unit that issued the mode switching instruction is the highest;
  • Step S150 when the priority level of the indoor unit that issued the mode switching instruction is not the highest, the mode switching instruction is forwarded to the indoor unit with the highest priority, and when the confirmation of the indoor unit is received, the operation of the multi-line system is switched. mode;
  • Step S160 When the priority level of the indoor unit that issues the mode switching instruction is the highest, the current operation mode of the multi-line system is switched according to the mode switching instruction.
  • the user may wish to switch the current operating mode, for example, switching the cooling mode to the heating mode, and after receiving the mode switching command, the indoor unit transmits it to the outdoor unit.
  • the outdoor unit first determines whether the priority level of the indoor unit that issued the mode switching command is the highest, and when the priority level of the indoor unit that issued the mode switching command is the highest, switches the current operation mode of the multi-line system according to the mode switching instruction. When the priority of the indoor unit that issued the mode switching command is not the highest, the mode switching command is forwarded to the indoor unit with the highest priority for confirmation.
  • the comparison priority is to compare the indoor unit that issued the mode switching command with the indoor unit that has been turned on.
  • control method further includes:
  • Step S170 after determining an operation mode of the multi-line system, acquiring a current indoor temperature corresponding to the indoor unit;
  • Step S180 When the current indoor temperature corresponding to the indoor unit reaches the target set temperature, the indoor unit is stopped for a preset time, and then the indoor unit is turned on.
  • the indoor unit After the operation mode of the multi-line system is determined, the indoor unit will also detect the current indoor temperature corresponding to the indoor unit.
  • the indoor temperature can be detected by a temperature sensor provided at the air return of the indoor unit.
  • the indoor unit When the indoor temperature corresponding to the indoor unit reaches the target set temperature, the indoor unit is controlled to stop working for a period of time, and then the indoor unit is turned on.
  • the multi-line system When the indoor unit stops working, the multi-line system will obtain the operation status of the remaining indoor units to re-determine the operation mode of the multi-line system.
  • the embodiment of the present invention further provides a multi-line system running the foregoing control method
  • the multi-line system includes the structure shown in FIG. 1 , and further includes a controller, and the controller can receive the control signal of the indoor unit. And control the outdoor unit operation according to the control signal.
  • the controller includes:
  • the temperature obtaining module 110 is configured to acquire an outdoor ambient temperature when receiving an opening instruction of the indoor unit
  • the temperature determining module 120 is configured to determine whether the outdoor ambient temperature is in a preset temperature interval
  • the control module 130 is configured to determine an operation mode of the multiple online system according to the running condition of each indoor unit when the outdoor ambient temperature is in a preset temperature interval.
  • an opening command can be issued, and the indoor target temperature and the operation mode, such as the cooling mode, the heating mode, and the like, can be set.
  • the indoor unit receives an open command issued by the user and transmits the open command to the outdoor unit.
  • the temperature acquisition module 110 acquires the outdoor ambient temperature according to the opening instruction of the indoor unit.
  • a temperature range that is, a temperature range of the transitional season, for example, 22 to 28 ° C is preset.
  • the outdoor ambient temperature is within the temperature range, it indicates that it is currently in a transitional season; when the outdoor ambient temperature is less than 22 °C, the air conditioning system is controlled to operate in a heating mode; when the outdoor ambient temperature is greater than 28 °C, the air conditioning system is controlled to operate. Cooling mode.
  • the operation status of each indoor unit is obtained, and according to the operation condition of each indoor unit, the operation mode of the multi-line system is determined according to a preset determination rule. That is, it is possible to run the cooling mode or the heating mode.
  • the operating conditions include operating states of the indoor unit, such as opening or closing, and operating modes of the indoor unit, such as a cooling mode, a heating mode, and the like.
  • the multi-line system when the multi-line system is running, it is determined whether the outdoor ambient temperature is in a transitional season. When the outdoor ambient temperature is in a transitional season, the operation status of each indoor unit is obtained, and the operation of each indoor unit is integrated. Determine the operating mode of the multi-line system, thus avoiding the operating mode conflicts of the multi-line system.
  • control module 130 in the controller is further configured to: determine whether there is an indoor unit that is turned on when the outdoor ambient temperature is in a preset temperature interval; and determine that an open command is issued when there is an indoor unit that is turned on Whether the priority of the indoor unit is the highest; when the priority of the indoor unit that issues the opening command is the highest, the operation mode of the multi-line system is determined according to the operation mode set by the indoor unit that issues the opening command; otherwise, according to the opened indoor unit The operating mode determines the operating mode of the multi-line system.
  • the outdoor unit Since the multi-line system is running, the outdoor unit will communicate with the indoor unit to inform each other's operating status. That is, when the outdoor ambient temperature is in the preset temperature range, by querying the outdoor unit, the opening condition of the indoor unit can be obtained, thereby judging whether there is an indoor unit that has been turned on.
  • each indoor unit is numbered in advance, for example, an indoor unit 1, an indoor unit 2, an indoor unit 3, ....
  • the priority levels are set for each indoor unit, and a priority level table is formed. Therefore, based on the preset level situation table, when it is determined that there is an indoor unit that has been turned on, the priority level of the opened indoor unit is compared with the priority level of the indoor unit that issues the opening command, and the indoor unit that issues the opening command is determined. Is the highest priority?
  • the operation mode of the multi-line system will be determined according to the operation mode set by the open command. For example, if the indoor unit that issues the open command is in the cooling mode and the multi-line system is currently in the heating mode, the current heating mode is switched to the cooling mode.
  • control module 130 is further configured to: when there is no indoor unit that is turned on, determine that at least two indoor units that issue an open command; and when at least two indoor units that issue an open command are used, according to the indoor unit
  • the number of units and their set operation mode determine the operation mode of the multi-line system according to the priority level or the multiple open priority rule.
  • the multi-connection system When there is no indoor unit that is turned on, it indicates that the multi-connection system is currently in an inoperative state, that is, whether the indoor unit that issued the opening command is one or more.
  • the indoor unit that issues the opening command is one
  • the multi-line system operation is controlled directly according to the operation mode set by the opening command.
  • the operation mode setting of each indoor unit is integrated, and the operation mode of the multi-line system is determined according to rules such as priority level or multiple open priority.
  • control module 130 is further configured to: when receiving the mode switching instruction sent by the indoor unit, determine whether the priority level of the indoor unit that issues the mode switching instruction is the highest; when the priority level of the indoor unit that issues the mode switching instruction is not At the highest time, the mode switching instruction is forwarded to the indoor unit with the highest priority, and when the confirmation of the indoor unit is received, the operation mode of the multi-line system is switched; when the indoor unit that issues the mode switching instruction has the highest priority Root The current operating mode of the multi-line system is switched according to the mode switching instruction.
  • the user may wish to switch the current operating mode, for example, switching the cooling mode to the heating mode, and after receiving the mode switching command, the indoor unit transmits it to the outdoor unit.
  • the outdoor unit first determines whether the priority level of the indoor unit that issued the mode switching command is the highest, and when the priority level of the indoor unit that issued the mode switching command is the highest, switches the current operation mode of the multi-line system according to the mode switching instruction. When the priority of the indoor unit that issued the mode switching command is not the highest, the mode switching command is forwarded to the indoor unit with the highest priority for confirmation.
  • the comparison priority is to compare the indoor unit that issued the mode switching command with the indoor unit that has been turned on.
  • control module 130 is further configured to: when the current indoor temperature corresponding to the indoor unit reaches the target set temperature, stop the indoor unit to operate for a preset time and then turn on the indoor unit.
  • the indoor unit After the operation mode of the multi-line system is determined, the indoor unit will also detect the current indoor temperature corresponding to the indoor unit.
  • the indoor temperature can be detected by a temperature sensor provided at the air return port of the indoor unit.
  • the indoor unit When the indoor temperature corresponding to the indoor unit reaches the target set temperature, the indoor unit is controlled to stop working for a period of time, and then the indoor unit is turned on.
  • the multi-line system When the indoor unit stops working, the multi-line system will obtain the operation status of the remaining indoor units to re-determine the operation mode of the multi-line system.

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Abstract

一种多联机系统及其控制方法，该控制方法包括以下步骤：当接收到室内机的开启指令时，获取室外环境温度（S110）；判断室外环境温度是否处于预设的温度区间（S120）；当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式（S130）。

Description

多联机系统及其控制方法
相关申请的交叉引用
本申请基于申请号为201610840220.4，申请日为2016年9月21日的中国专利申请提出，并要求前述中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及空调领域，特别涉及一种多联机系统及其控制方法。
背景技术
多联机空调系统是一种使用单台或多台室外机并联，配置多台空调室内机的一种系统，室内机独立控制，一般运行模式为制冷、制热、送风等，但同一系统中，外机只能运行一种模式，而不能同时制冷和制热，由于每个人的体感不同，在过渡性季节会出现一部分人想开制冷、另一部分人想开制热的情况，此时，就必须对空调系统设置一种模式优先，系统优先运作该模式，目前各空调厂家的优先模式大致为制冷优先或制热优先。但这种做法具有一定的局限性，并不能满足大部分用户的使用需求，用户体验不高。
发明内容
本发明的主要目的是提出一种多联机系统及其控制方法，旨在避免多联机系统运行模式的冲突。
为实现上述目的，本发明提出的一种多联机系统的控制方法，包括以下步骤：
当接收到室内机的开启指令时，获取室外环境温度；
判断室外环境温度是否处于预设的温度区间；
当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式。
优选地，所述当室外环境温度处于预设的温度区间时，根据各室内机的运行情况，确定多联机系统的运行模式的步骤包括：
当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；
当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最高；
当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的 运行模式。
优选地，所述当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机的步骤之后还包括：
当不存在已开启的室内机时，判断发出开启指令的室内机是否为至少两台；
当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
优选地，所述控制方法还包括：
当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；
当发出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；
当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。
优选地，所述控制方法还包括：
当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
优选地，所述控制方法还包括：
当所述室外环境温度小于所述预设温度区间的下限时，控制所述多联机系统运行制热模式；
当室外环境温度大于所述预设温度区间的上限时，控制所述多联机系统运行制冷模式。
此外，为实现上述目的，本发明还提供了一种多联机系统，包括至少一室外机以及至少两个室内机，室内机与室外机之间形成冷媒循环回路；而且室内机和室外机之间相互通讯，室外机包括控制器，接收室内机的控制信号，并根据控制信号控制室外机运行；所述控制器包括：
温度获取模块，用于当接收到室内机的开启指令时，获取室外环境温度；
温度判断模块，用于判断室外环境温度是否处于预设的温度区间；
控制模块，用于当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式。
优选地，所述控制模块还用于：当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最 高；当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的运行模式。
优选地，所述控制模块还用于：当不存在已开启的室内机时，判断发出开启指令的室内机为至少两台；当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
优选地，所述控制模块还用于：当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；当发出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。
优选地，所述控制模块还用于：当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
优选地，所述控制模块还用于：
当所述室外环境温度小于所述预设温度区间的下限时，控制所述多联机系统运行制热模式；当室外环境温度大于所述预设温度区间的上限时，控制所述多联机系统运行制冷模式。
本发明实施例在多联机系统运行时，判断室外环境温度是否位于过渡性季节，当室外环境温度运行在过渡性季节时，将获取各室内机的运行情况，并综合各室内机的运行情况，确定多联机系统的运行模式，从而避免了多联机系统的运行模式冲突。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明多联机系统一实施例的结构示意图；
图2为本发明多联机系统的控制方法第一实施例的流程示意图；
图3为本发明多联机系统的控制方法中确定多联机系统的运行模式的细化步骤示意图；
图4为本发明多联机系统的控制方法第二实施例的流程示意图；
图5为本发明多联机系统的控制方法第三实施例的流程示意图；
图6为本发明多联机系统的控制器的功能模块示意图。
附图标号说明：
标号 名称 标号 名称
1 压缩机 2 四通阀
3 室外换热器 4 第一节流元件
5a 第一电子膨胀阀 5b 第二电子膨胀阀
6a 第一室内换热单元 6b 第二室内换热单元
7 高压阀 8 低压阀
9 气液分离器    
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提供了一种多联机系统的控制方法，主要解决过渡性季节使用多联机空调系统时，部分人希望室内机运行制冷模式，另外一部分人希望室内机运行制热模式而造成多联机系统运行模式的冲突，将环境温度进行划分，以对过渡性季节的运行进行单独控制，以避免运行模式的冲突。
具体地，如图1所示，示出了本发明多联机系统一实施例的结构。该多联机系统包括压缩机1、四通阀2、室外换热器3、第一节流部件4、第二节流部件、室内换热器。其中室内换热器可包括多个室内换热单元，例如图1所示的第一室内换热单元6a、第二室内换热单元6b。对应的第二节流部件也包括第一电子膨胀阀5a、第二电子膨胀阀5b。
上述四通阀2具有四个端口，即第一端口a、第二端口b、第三端口c、第四端口d。
压缩机1的排气口通过冷媒管路分别与四通阀2的第一端口a连通，且所述压缩机的排气口处可设置单向阀，以防止排气口的冷媒回流。压缩机1的回气口通过冷媒管路分别与四通阀2的第三端口c连通。可以理解的是，该多联机系统还可包括一气液分离器9，即将返回压缩1的冷媒进行气液分离，避免液态的冷媒进入压缩机1。四通阀2的第三端口c与气液分离器9的入口连通，气液分离器9的出口再通过冷媒管路与压缩机1的回气口连通。
室外换热器3的一端通过冷媒管路与四通阀2的第二端口b连通，室外换热器3另一端通过冷媒管路与第一节流部件4的一端连通。第一节流部件4的另一端与室内换热器一端连通。即分别与第一室内换热单元6a的一端以及第二室内换热单元6b的一端连通。
室内换热器另一端通过冷媒管路分别与四通阀2的第四端口d连通。即第一室内换热单元6a的另一端以及第二室内换热单元6b的另一端通过冷媒管路汇合后，再分别与四通阀2的第四端口d连通。
上述第一节流部件4与室内换热器的一端连通的冷媒管路上设有高压阀7。上述室内换热器另一端与四通阀2连通的冷媒管路上设有低压阀8。
基于上述多联机系统，本发明提出了一种多联机系统的控制方法。如图2所示，该控制方法可包括：
步骤S110、当接收到室内机的开启指令时，获取室外环境温度；
当用户希望开启室内机，以对室内机所在的区域进行温度调节时，例如升温或降温，可以发出开启指令，并设定室内目标温度及运行模式，例如制冷模式、制热模式等等。室内机接收到用户发出的开启指令，并将该开启指令发送至室外机。室外机则根据室内机的开启指令，获取室外环境温度。
步骤S120、判断室外环境温度是否处于预设的温度区间；
本实施例中，预设一温度区间，即过渡性季节的温度范围，例如22～28℃。当室外环境温度处于该温度区间内，则表示当前处于过渡性季节；当室外环境温度小于22℃时，则控制空调系统运行制热模式；当室外环境温度大于28℃时，则控制空调系统运行制冷模式。
步骤S130、当室外环境温度处于预设的温度区间时，根据各室内机的运行情况，确定多联机系统的运行模式。
当室外环境温度处于预设的温度区间时，则获取各室内机的运行情况，并根据各室内机的运行情况，按照预设的确定规则，确定多联机系统的运行模式。即可能运行制冷模式，也可能运行制热模式。该运行情况包括室内机的运行状态，例如开启或关闭，以及室内机的运行模式，例如制冷模式、制热模式等等。
本发明实施例在多联机系统运行时，判断室外环境温度是否位于过渡性季节，当室外环境温度运行在过渡性季节时，将获取各室内机的运行情况，并综合各室内机的运行情况，确定多联机系统的运行模式，从而避免了多联机系统的运行模式冲突。
进一步地，如图3所示，上述步骤S130包括：
步骤S131、当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；
由于多联机系统运行过程中，室外机将与室内机进行互相通讯，以告知各自的运行状态。即当室外环境温度处于预设的温度区间时，通过查询室外机，即可获得室内机的开启情况，从而判断是否存在已开启的室内机。
步骤S132、当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最高；
本发明实施例中，预先将各室内机进行编号，例如室内机1、室内机2、室内机3…。对各室内机进行优先等级的设置，并形成优先等级情况表。因此，基于该预设的等级情况表，当判断存在已开启的室内机时，将已开启的室内机的优先等级与发出开启指令的室内机的优先等级进行比较，确定发出开启指令的室内机的优先等级是否最高。
步骤S133、当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的运行模式。
若发出开启指令的室内机的优先等级最高时，将按照该开启指令所设定的运行模式，确定多联机系统的运行模式。例如发出开启指令的室内机为制冷模式，多联机系统当前运行为制热模式，则将当前的制热模式切换为制冷模式。
当发出开启指令的室内机的优先等级不是最高时，即已开启的室内机之一的优先等级为最高，则不做处理，按多联机系统的当前运行模式运行。
步骤S134、当不存在已开启的室内机时，判断发出开启指令的室内机是否为至少两台；
当不存在已开启的室内机时，表示多联机系统当前处于未运行状态，即判断发出开启指令的室内机是一台，还是多台。当发出开启指令的室内机为一台时，直接根据该开启指令设定的运行模式，控制多联机系统运行。当发出开启指令的室内机为两台以上时，则综合各室 内机的运行模式设定情况，按照优先等级或多开优先等规则，确定多联机系统的运行模式。
步骤S135、当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
按优先等级规则确定多联机系统的运行模式，可参照前面所述。多开优先规则是指，根据发出开启指令的室内机台数以及各室内机设定的运行模式，哪个设定的运行模式多就按其确定多联机系统的运行模式。例如，发出开启指令的室内机为室内机1、室内机2、室内机4，且室内机1设定的运行模式为制冷模式，室内机2设定的运行模式为制热模式，室内机4设定的运行模式为制冷模式，则按多开优先规则，该多联机系统的最终运行模式为制冷模式。
进一步地，如图4所示，所述控制方法还包括：
步骤S140、在确定多联机系统的运行模式后，当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；
步骤S150、当发出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；
步骤S160、当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。
在确定多联机系统的运行模式后，用户可能希望切换当前运行模式，例如将制冷模式切换为制热模式，室内机接收到模式切换指令后，将其发送至室外机。室外机则先判断发出模式切换指令的室内机的优先等级是否为最高，当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。当发出模式切换指令的室内机的优先等级不是最高时，则将模式切换指令转发至优先等级最高的室内机进行确认。需要说明的是，上述比较优先等级是将发出模式切换指令的室内机与已开启的室内机之间进行比较。
进一步地，如图5所示，所述控制方法还包括：
步骤S170、在确定多联机系统的运行模式后，获取室内机对应的当前室内温度；
步骤S180、当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
在多联机系统的运行模式确定后，室内机还将检测室内机对应的当前室内温度。本实施 例中，可以通过设置在室内机回风口处的温度传感器检测室内温度。当室内机对应的室内温度达到目标设定温度时，则控制室内机停止工作一段时间后，再开启室内机。当室内机停止工作后，多联机系统将获取其余的室内机的运行情况，以重新确定多联机系统的运行模式。
对应地，本发明实施例还提供了运行上述控制方法的一种多联机系统，该多联机系统包括如图1所示的结构，还包括控制器，该控制器可以接收室内机的控制信号，并根据控制信号控制室外机运行。具体地，如图6所示，该控制器包括：
温度获取模块110，用于当接收到室内机的开启指令时，获取室外环境温度；
温度判断模块120，用于判断室外环境温度是否处于预设的温度区间；
控制模块130，用于当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式。
当用户希望开启室内机，以对室内机所在的区域进行温度调节时，例如升温或降温，可以发出开启指令，并设定室内目标温度及运行模式，例如制冷模式、制热模式等等。室内机接收到用户发出的开启指令，并将该开启指令发送至室外机。温度获取模块110则根据室内机的开启指令，获取室外环境温度。
本实施例中，预设一温度区间，即过渡性季节的温度范围，例如22～28℃。当室外环境温度处于该温度区间内，则表示当前处于过渡性季节；当室外环境温度小于22℃时，则控制空调系统运行制热模式；当室外环境温度大于28℃时，则控制空调系统运行制冷模式。
当室外环境温度处于预设的温度区间时，则获取各室内机的运行情况，并根据各室内机的运行情况，按照预设的确定规则，确定多联机系统的运行模式。即可能运行制冷模式，也可能运行制热模式。该运行情况包括室内机的运行状态，例如开启或关闭，以及室内机的运行模式，例如制冷模式、制热模式等等。
本发明实施例在多联机系统运行时，判断室外环境温度是否位于过渡性季节，当室外环境温度运行在过渡性季节时，将获取各室内机的运行情况，并综合各室内机的运行情况，确定多联机系统的运行模式，从而避免了多联机系统的运行模式冲突。
进一步地，上述控制器中的控制模块130还用于：当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最高；当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的运行模式。
由于多联机系统运行过程中，室外机将与室内机进行互相通讯，以告知各自的运行状态。即当室外环境温度处于预设的温度区间时，通过查询室外机，即可获得室内机的开启情况，从而判断是否存在已开启的室内机。
本发明实施例中，预先将各室内机进行编号，例如室内机1、室内机2、室内机3…。对各室内机进行优先等级的设置，并形成优先等级情况表。因此，基于该预设的等级情况表，当判断存在已开启的室内机时，将已开启的室内机的优先等级与发出开启指令的室内机的优先等级进行比较，确定发出开启指令的室内机的优先等级是否最高。
若发出开启指令的室内机的优先等级最高时，将按照该开启指令所设定的运行模式，确定多联机系统的运行模式。例如发出开启指令的室内机为制冷模式，多联机系统当前运行为制热模式，则将当前的制热模式切换为制冷模式。
当发出开启指令的室内机的优先等级不是最高时，即已开启的室内机之一的优先等级为最高，则不做处理，按多联机系统的当前运行模式运行。
进一步地，上述控制模块130还用于：当不存在已开启的室内机时，判断发出开启指令的室内机为至少两台；当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
当不存在已开启的室内机时，表示多联机系统当前处于未运行状态，即判断发出开启指令的室内机是一台，还是多台。当发出开启指令的室内机为一台时，直接根据该开启指令设定的运行模式，控制多联机系统运行。当发出开启指令的室内机为两台以上时，则综合各室内机的运行模式设定情况，按照优先等级或多开优先等规则，确定多联机系统的运行模式。
上述按优先等级规则确定多联机系统的运行模式，可参照前面所述。多开优先规则是指，根据发出开启指令的室内机台数以及各室内机设定的运行模式，哪个设定的运行模式多就按其确定多联机系统的运行模式。例如，发出开启指令的室内机为室内机1、室内机2、室内机4，且室内机1设定的运行模式为制冷模式，室内机2设定的运行模式为制热模式，室内机4设定的运行模式为制冷模式，则按多开优先规则，该多联机系统的最终运行模式为制冷模式。
进一步地，上述控制模块130还用于：当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；当发出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；当发出模式切换指令的室内机的优先等级为最高时，根 据模式切换指令对多联机系统的当前运行模式进行切换。
在确定多联机系统的运行模式后，用户可能希望切换当前运行模式，例如将制冷模式切换为制热模式，室内机接收到模式切换指令后，将其发送至室外机。室外机则先判断发出模式切换指令的室内机的优先等级是否为最高，当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。当发出模式切换指令的室内机的优先等级不是最高时，则将模式切换指令转发至优先等级最高的室内机进行确认。需要说明的是，上述比较优先等级是将发出模式切换指令的室内机与已开启的室内机之间进行比较。
进一步地，上述控制模块130还用于：当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
在多联机系统的运行模式确定后，室内机还将检测室内机对应的当前室内温度。本实施例中，可以通过设置在室内机回风口处的温度传感器检测室内温度。当室内机对应的室内温度达到目标设定温度时，则控制室内机停止工作一段时间后，再开启室内机。当室内机停止工作后，多联机系统将获取其余的室内机的运行情况，以重新确定多联机系统的运行模式。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (12)

  1. 一种多联机系统的控制方法，其特征在于，所述控制方法包括以下步骤：
    当接收到室内机的开启指令时，获取室外环境温度；
    判断室外环境温度是否处于预设的温度区间；
    当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式。
  2. 如权利要求1所述的多联机系统的控制方法，其特征在于，所述当室外环境温度处于预设的温度区间时，根据各室内机的运行情况，确定多联机系统的运行模式的步骤包括：
    当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；
    当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最高；
    当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的运行模式。
  3. 如权利要求2所述的多联机系统的控制方法，其特征在于，所述当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机的步骤之后还包括：
    当不存在已开启的室内机时，判断发出开启指令的室内机是否为至少两台；
    当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
  4. 如权利要求2所述的多联机系统的控制方法，其特征在于，所述控制方法还包括：
    当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；
    当发出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；
    当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。
  5. 如权利要求1-4任一项所述的多联机系统的控制方法，其特征在于，所述控制方法还包括：
    当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
  6. 如权利要求1所述的多联机系统的控制方法，其特征在于，所述控制方法还包括：
    当所述室外环境温度小于所述预设温度区间的下限时，控制所述多联机系统运行制热模式；
    当室外环境温度大于所述预设温度区间的上限时，控制所述多联机系统运行制冷模式。
  7. 一种多联机系统，包括至少一室外机以及至少两个室内机，室内机与室外机之间形成冷媒循环回路；而且室内机和室外机之间相互通讯，室外机包括控制器，接收室内机的控制信号，并根据控制信号控制室外机运行；其特征在于，所述控制器包括：
    温度获取模块，用于当接收到室内机的开启指令时，获取室外环境温度；
    温度判断模块，用于判断室外环境温度是否处于预设的温度区间；
    控制模块，用于当室外环境温度处于预设的温度区间时，根据开启的各室内机的运行情况，确定多联机系统的运行模式。
  8. 如权利要求7所述的多联机系统，其特征在于，所述控制模块还用于：当室外环境温度处于预设的温度区间时，判断是否存在已开启的室内机；当存在已开启的室内机时，判断发出开启指令的室内机的优先等级是否最高；当发出开启指令的室内机的优先等级最高时，按照发出开启指令的室内机设定的运行模式，确定多联机系统的运行模式；否则按照已开启的室内机的运行模式，确定多联机系统的运行模式。
  9. 如权利要求8所述的多联机系统，其特征在于，所述控制模块还用于：当不存在已开启的室内机时，判断发出开启指令的室内机为至少两台；当发出开启指令的室内机为至少两台时，根据室内机的台数及其设定的运行模式，按照优先等级或多开优先规则，确定多联机系统的运行模式。
  10. 如权利要求8所述的多联机系统，其特征在于，所述控制模块还用于：当接收到室内机发出的模式切换指令时，判断发出模式切换指令的室内机的优先等级是否为最高；当发 出模式切换指令的室内机的优先等级不是最高时，将所述模式切换指令转发至优先等级最高的室内机，并在接收到该室内机的确认时，切换多联机系统的运行模式；当发出模式切换指令的室内机的优先等级为最高时，根据模式切换指令对多联机系统的当前运行模式进行切换。
  11. 如权利要求7-10任一项所述的多联机系统，其特征在于，所述控制模块还用于：当室内机对应的当前室内温度达到目标设定温度时，停止室内机运行预设时间后再开启室内机。
  12. 如权利要求7所述的多联机系统，其特征在于，所述控制模块还用于：
    当所述室外环境温度小于所述预设温度区间的下限时，控制所述多联机系统运行制热模式；当室外环境温度大于所述预设温度区间的上限时，控制所述多联机系统运行制冷模式。
PCT/CN2017/099277 2016-09-21 2017-08-28 多联机系统及其控制方法 Ceased WO2018054196A1 (zh)

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