WO2020038006A1 - Control method for multi-split air conditioning system - Google Patents

Control method for multi-split air conditioning system Download PDF

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Publication number
WO2020038006A1
WO2020038006A1 PCT/CN2019/083647 CN2019083647W WO2020038006A1 WO 2020038006 A1 WO2020038006 A1 WO 2020038006A1 CN 2019083647 W CN2019083647 W CN 2019083647W WO 2020038006 A1 WO2020038006 A1 WO 2020038006A1
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WIPO (PCT)
Prior art keywords
outdoor unit
cooling
heating
mode
expansion valve
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PCT/CN2019/083647
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French (fr)
Chinese (zh)
Inventor
禚百田
时斌
程绍江
张锐钢
王军
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青岛海尔空调电子有限公司
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Publication of WO2020038006A1 publication Critical patent/WO2020038006A1/en

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    • 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
    • F24F11/88—Electrical aspects, e.g. circuits

Definitions

  • the invention belongs to the technical field of air conditioning, and specifically provides a control method for a multi-line air conditioning system.
  • Multi-connected air-conditioning system is a type of central air-conditioning system, commonly known as "one drag and more", which refers to an outdoor unit connected to multiple indoor units through pipes. It has a wide range of applications in small and medium-sized buildings and some public buildings. .
  • Existing multi-connected air-conditioning systems can include both cooling indoor units and heating indoor units, all of which are connected to outdoor units.
  • the disadvantage of the structure of this type of air-conditioning system is that the outdoor unit can only choose the cooling mode and One operation in the heating mode, which makes the multi-line air conditioning system prone to the problem of uneven heating and cooling effects.
  • the capacity of a refrigerating indoor unit and the capacity of a heating indoor unit are generally compared, and then the operation mode of the outdoor unit is determined.
  • the outdoor unit heat exchanger will release heat to the outside to reduce the temperature of the refrigerant.
  • This method is beneficial to improving the cooling effect of the cooling indoor unit, but will reduce the heating effect of the heating indoor unit;
  • the outdoor unit heat exchanger will absorb heat from the outside to increase the temperature of the refrigerant. This method is beneficial to the heating effect of the heating indoor unit, but it will reduce the cooling effect of the cooling indoor unit.
  • the above control method can make both the cooling indoor unit and the heating indoor unit operate normally, the effect of the cooling indoor unit and the heating indoor unit cannot be guaranteed. Generally, only one side can be focused, that is, the heating of the heating indoor unit is guaranteed. The effect will affect the cooling effect of the refrigerating indoor unit, ensuring that the cooling effect of the refrigerating indoor unit will affect the heating effect of the heating indoor unit, and it is impossible to take into account all the indoor units. That is, the existing control method of the multi-connected air-conditioning system cannot solve the problem of uneven heating and cooling effects during the operation of the multi-connected air-conditioning system.
  • the present invention provides a method for A control method for an on-line air conditioning system.
  • the multi-online air conditioning system includes an outdoor unit and a plurality of indoor units connected to the outdoor unit.
  • the control method includes: obtaining a cooling and heating effect load balancing index of the air conditioning system and a current operating mode of the outdoor unit; Selectively adjust the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit.
  • the step of "obtaining the cooling and heating effect load balance index of the air conditioning system” specifically includes: obtaining the total cooling load and the total heating load of all indoor units; calculating the total cooling load and the total heating load The sum of the loads; calculate the ratio of the total cooling load to the sum to obtain the cooling and heating effect load balance index.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Greater than the first preset value and the current operating mode of the outdoor unit is a cooling mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is less than or equal to the first preset value and greater than or equal to the second preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Less than the second preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioner is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operation of the system.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the heating mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Greater than the third preset value and the current operation mode of the outdoor unit is heating mode, the current status of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit is continued to be obtained; based on the current status of the electronic expansion valve and the fan of the outdoor unit, select Adjust the control operation of the air conditioning system.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the cooling mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is less than or equal to the third preset value and greater than or equal to the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index If it is smaller than the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
  • the step of "obtaining the cooling and heating effect load balance index of the air conditioning system” specifically includes: obtaining the total cooling load and the total heating load of all indoor units; calculating the total cooling load and the total heating load The sum of the loads; calculate the ratio of the total heating load to the sum to obtain the cooling and heating effect load balance index.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Less than the fifth preset value and the current operation mode of the outdoor unit is a cooling mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is greater than or equal to the fifth preset value and less than or equal to the sixth preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Greater than the sixth preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioner is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operation of the system.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the heating mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" specifically includes: if the cooling and heating effect load balancing index Less than the seventh preset value and the current operation mode of the outdoor unit is a heating mode, then the current status of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit continue to be obtained; based on the current status of the electronic expansion valve and the fan of the outdoor unit, select Adjust the control operation of the air conditioning system.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
  • the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the cooling mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is greater than or equal to the seventh preset value and less than or equal to the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index If it is greater than the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
  • control method before the outdoor unit is turned on, the control method further includes: obtaining a total cooling load and a total heating load of all the indoor units; and selecting the outdoor unit to be turned on according to the total cooling load and the total heating load. mode.
  • the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” includes: calculating the sum of the total cooling load and the total heating load; calculating the total cooling load and the The ratio of the sum value is used to obtain the cooling and heating effect load balancing index; according to the cooling and heating effect load balancing index, the outdoor unit's on mode is selected.
  • the step of "selecting an on mode of the outdoor unit according to the cooling and heating effect load balancing index" specifically includes: if the cooling and heating effect load balancing index is greater than or equal to a ninth preset value, The outdoor unit is turned on in cooling mode.
  • the step of "selecting an on mode of the outdoor unit according to the cooling and heating effect load balancing index" further includes: if the cooling and heating effect load balancing index is less than a ninth preset value, the outdoor unit Turn on in heating mode.
  • the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” includes: calculating the sum of the total cooling load and the total heating load; calculating the total heating load Obtain the cooling and heating effect load balance index by the ratio with the sum value; according to the cooling and heating effect load balance index, select the on mode of the outdoor unit.
  • the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" specifically includes: if the cooling and heating effect load balancing index is greater than or equal to the tenth preset value, The outdoor unit is turned on in heating mode.
  • the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" further includes: if the cooling and heating effect load balancing index is less than the tenth preset value, the outdoor unit Turn on in cooling mode.
  • the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” specifically includes: if the total cooling load is greater than or equal to the total heating load, the outdoor unit uses cooling The mode is on.
  • the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” further includes: if the total cooling load is less than the total heating load, the outdoor unit is in a heating mode On.
  • the cooling and heating effect load balancing index of the air conditioning system and the current operation mode of the outdoor unit are first obtained, and then the cooling and heating effect load balancing index and the outdoor unit are obtained.
  • Current operating mode to selectively adjust the control operation of the air-conditioning system, so that when the indoor unit of the multi-line air-conditioning system has a problem of imbalanced cooling and heating, it can be adjusted in real time, thereby ensuring all cooling indoor units and heating indoor units
  • the balance of effects taking into account the heating effect of all heating indoor units and the cooling effect of all cooling indoor units, while reducing the energy consumption of the air conditioning system as much as possible, so that the multi-line air conditioning system is more energy efficient.
  • the cooling and heating effect load balance index calculated by the ratio of the total cooling load to the sum of the total cooling load and the total heating load can feedback the heating effect of the heating indoor unit and the cooling effect of the cooling indoor unit, that is, When the load balance index of the cooling and heating effect is greater than the first preset value and the current operation mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time, and the air conditioning system should be increased The opening degree of the electronic expansion valve on the outdoor unit side and the fan speed of the outdoor unit are increased, thereby improving the cooling effect of the air conditioning system; the load balancing index in the cooling and heating effect is less than or equal to the first preset value and greater than or equal to the second preset value And when the current operation mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are relatively balanced at this time and maintained at a better level.
  • the current control operation should be maintained, that is, the entire air conditioning system. No need to adjust the control operation; the load balance index of the cooling and heating effect is less than the second preset value and the outdoor unit's current When the row mode is cooling mode, it means that the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit.
  • the opening of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced. Reduce the cooling effect of the air conditioning system and improve the heating effect.
  • the outdoor unit needs to be replaced by The cooling mode is adjusted to the heating mode, and the opening degree of the electronic expansion valve is increased and the fan speed of the outdoor unit is increased, thereby further improving the heating effect of the air conditioning system.
  • the load balance index of the cooling and heating effect is greater than the third preset value and the current operation mode of the outdoor unit is the heating mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time.
  • the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced to reduce the heating effect of the air conditioning system and improve the cooling effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped In turn, when the cooling and heating effect load balance index is still greater than the third preset value, it is necessary to adjust the outdoor unit from the heating mode to the cooling mode, and increase the opening degree of the electronic expansion valve and increase the fan speed of the outdoor unit, thereby further Improve the cooling effect of the air conditioning system; the load balance index of the cooling and heating effect is less than or equal to the third preset value and greater than or equal to the fourth preset value and the current operating mode of the outdoor unit is the heating mode, indicating that the indoor unit of the cooling unit is at this time The cooling effect and heating effect of the heating indoor unit are relatively balanced and maintained at a better level, and the current control should be maintained Operation, that is, the entire air conditioning system does not need to adjust the control operation; the load balance index of the cooling and heating
  • the cooling and heating balance of the air-conditioning system can always be ensured, that is, the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are balanced, thereby achieving the purpose of taking into account the effects of all indoor units and reducing
  • the energy consumption of the online air-conditioning system makes the multi-line air-conditioning system more energy efficient and improves the user experience.
  • the cooling and heating effect load balance index calculated by the ratio of the total heating load to the total cooling load and the sum of the total heating load can be fed back to the heating indoor unit.
  • the heating effect and the cooling effect of the cooling indoor unit that is, when the load balance index of the cooling and heating effect is less than the fifth preset value and the current operating mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating at this time.
  • the heating effect of the indoor unit should increase the opening of the electronic expansion valve on the outdoor unit side of the air conditioning system and increase the fan speed of the outdoor unit, thereby improving the cooling effect of the air conditioning system; the load balancing index of the cooling and heating effect is greater than or equal to the fifth
  • the preset value is less than or equal to the sixth preset value and the current operating mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are relatively balanced at this time and maintained at a better level
  • the current control operation should be maintained, that is, the entire air-conditioning system does not need to adjust the control operation;
  • it is greater than the sixth preset value and the current operation mode of the outdoor unit is the cooling mode it means that the heating effect of the heating indoor unit at this time is not as good as the cooling effect of the cooling indoor unit.
  • the electronic expansion valve on the outdoor unit side of the air conditioning system should be reduced. Opening and reduce the fan speed of the outdoor unit, thereby reducing the cooling effect of the air conditioning system and improving the heating effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped, the cooling and heating effect load balance index is still greater than the sixth When the value is preset, it is necessary to adjust the outdoor unit from the cooling mode to the heating mode, and increase the opening degree of the electronic expansion valve and increase the fan speed of the outdoor unit, thereby further improving the heating effect of the air conditioning system.
  • the load balance index of the cooling and heating effect is less than the seventh preset value and the current operation mode of the outdoor unit is the heating mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time.
  • the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced to reduce the heating effect of the air conditioning system and improve the cooling effect.
  • the outdoor unit needs to be adjusted from the heating mode to the cooling mode, and the opening degree of the electronic expansion valve and the fan speed of the outdoor unit are increased, thereby further Improve the cooling effect of the air conditioning system;
  • the load balance index of the cooling and heating effect is greater than or equal to the seventh preset value and less than or equal to the eighth preset value and the current operating mode of the outdoor unit is the heating mode, indicating that the indoor unit of the cooling unit is at this time
  • the cooling effect and heating effect of the heating indoor unit are relatively balanced and maintained at a better level, and the current control should be maintained Operation, that is, the entire air-conditioning system does not need to adjust the control operation;
  • the load balance index of the cooling and heating effect is greater than the eighth preset value and the current operation mode of the outdoor unit is the heating mode, indicating that the heating effect of the heating indoor unit is not as good at this time
  • the cooling and heating balance of the air-conditioning system can be ensured at all times, that is, the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are balanced, thereby achieving the effects of all indoor units.
  • the purpose is to reduce the energy consumption of the multi-connected air-conditioning system, make the multi-connected air-conditioning system more energy efficient, and improve the user experience.
  • the cooling and heating effect load balance index calculated by the ratio of the total cooling load and the sum of the total cooling load and the total heating load can be calculated by the cooling and heating effect load balance index.
  • Select the on mode of the outdoor unit If the load balance index of the cooling and heating effect is greater than or equal to the ninth preset value, it means that the total cooling load of the indoor unit is greater than the total heating load, that is, the cooling effect of the cooling indoor unit is not as good as that of the heating room.
  • the outdoor unit's heating effect should be turned on in cooling mode.
  • the load balance index of the cooling and heating effect is less than the ninth preset value, it means that the total cooling load of the indoor unit is less than the total heating load, that is, the heating room.
  • the heating effect of the unit is not as good as the cooling effect of the indoor unit.
  • the outdoor unit should be turned on in the heating mode.
  • the cooling and heating effect load balance index calculated by the ratio of the total heating load to the total cooling load and the sum of the total heating load can be selected, and then the outdoor heating On mode, if the cooling and heating effect load balance index is greater than or equal to the tenth preset value, it means that the total heating load of the indoor unit is greater than the total cooling load, that is, the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit.
  • the outdoor unit should be turned on in heating mode; on the contrary, if the load balance index of the cooling and heating effect is less than the tenth preset value, it means that the total heating load of the indoor unit at this time is less than the total cooling load, that is, the cooling effect of the cooling indoor unit Not as good as the heating effect of the indoor unit.
  • the outdoor unit should be turned on in cooling mode.
  • a method of directly comparing the total cooling load and the total heating load may also be adopted, that is, if the total cooling load of the indoor unit is greater than the total heating The load indicates that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the outdoor unit should be turned on in the cooling mode to improve the cooling effect of the cooling indoor unit. If the total cooling load of the indoor unit is equal to the total heating load It shows that the cooling effect of the cooling indoor unit is very balanced with the heating effect of the heating indoor unit. At this time, the outdoor unit can be directly turned on in the cooling mode. If the total cooling load of the indoor unit is less than the total heating load, it means that the The heating effect is not as good as the cooling effect of a cooling indoor unit. At this time, the outdoor unit should be turned on in a heating mode to improve the heating effect of the heating indoor unit. Through this control method, before the outdoor unit is turned on, the optimal opening mode has been selected through judgment.
  • the cooling / heating effect of the indoor unit can be improved immediately, and the cooling of the multi-line air conditioning system can be achieved.
  • the heating is kept balanced or the equilibrium is reached at the fastest speed, thereby reducing the energy consumption of the multi-line air conditioning system, thereby making the multi-line air conditioning system more energy efficient and improving the user experience.
  • FIG. 1 is a flowchart of a control method of a multi-connected air-conditioning system according to the present invention
  • FIG. 2 is a schematic diagram of a connection between an outdoor unit and an indoor unit in Embodiment 6 of the present invention
  • FIG. 3 is a parameter table of the indoor unit in the sixth embodiment of the present invention.
  • the present invention provides a control method for a multi-connected air-conditioning system. While ensuring the balance of the effects of all cooling indoor units and heating indoor units, and taking into account the heating effects of all heating indoor units and the cooling effects of all cooling indoor units, at the same time reducing the energy consumption of the air conditioning system as much as possible, and enabling multi-line air conditioning The system is more energy efficient.
  • the multi-connected air-conditioning system of the present invention includes an outdoor unit and multiple indoor units connected to the outdoor unit.
  • the control method of the present invention includes: obtaining a cooling and heating effect load balance index of the air-conditioning system and outdoor The current operation mode of the air conditioner; selectively adjusts the control operation of the air conditioning system according to the cooling and heating effect load balance index and the current operation mode of the outdoor unit.
  • the cooling and heating effect load balancing index referred to in the present invention can also be referred to as the cooling and heating effect load balancing rate, that is, calculated from the total cooling load and total heating load of the indoor unit.
  • cooling and heating effect load balance index Rate CoolLoad / (CoolLoad + HeatLoad)
  • CoolLoad CoolLoad + HeatLoad
  • HeatLoad the ratio of the total cooling load HeatLoad to the total cooling load CoolLoad and the total heating load HeatLoad.
  • the cooling and heating effect load balancing index Rate HeatLoad / (CoolLoad + HeatLoad)
  • the steps of "obtaining the cooling and heating effect load balance index of the air-conditioning system” specifically include: obtaining the total cooling load CoolLoad and the total heating load HeatLoad of all indoor units; calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating The ratio of the total cooling load CoolLoad and the sum value (CoolLoad + HeatLoad) to obtain the cooling and heating effect load balance index Rate.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is greater than the first preset value and the outdoor unit
  • the current operating mode is cooling mode, increase the opening of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit.
  • the first preset value can be set to 55%, that is, when Rate is greater than 55%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling of the indoor unit is cooling. The effect is not as good as the heating effect of the indoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling of the indoor unit. effect.
  • the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%).
  • the fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate.
  • the electronic expansion of the outdoor unit is increased again.
  • Valve opening and increase fan speed of outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
  • the first preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the first preset value in actual applications, as long as it is determined by the first preset value.
  • the demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is less than Or equal to the first preset value and greater than or equal to the second preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
  • the second preset value can be set to 45%, that is, when the Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times.
  • the second preset value is not limited to 45%, and may also be other percentage values.
  • the boundary interval determined by the two preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is less than The second preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioning system is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operations.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Then reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the heating mode, increasing The opening degree of the electronic expansion valve increases the fan speed of the outdoor unit.
  • the second preset value of 45% is, when the Rate is less than 45%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured.
  • the thermal effect is not as good as the cooling effect of the indoor unit. Because the outdoor unit is in the cooling mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat radiation of the outdoor unit is reduced, thereby improving the heating effect of the indoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%), and the fan speed of the outdoor unit is reduced.
  • the opening ratio of the electronic expansion valve of the outdoor unit correspondingly reduced, that is, after reducing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate, if Rate If it is still less than 45%, reduce the opening degree of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit again.
  • the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention.
  • the opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still less than 45%, then the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time.
  • the step of “selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is greater than a third preset value and the outdoor unit The current operation mode of the heating unit is to continue to obtain the current state of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit; and to selectively adjust the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the cooling mode, increasing the electronic The opening of the expansion valve increases the fan speed of the outdoor unit.
  • the multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good. Since the outdoor unit is in heating mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat absorption of the outdoor unit is reduced, thereby improving the cooling effect of the indoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%). The opening ratio of the electronic expansion valve of the outdoor unit is correspondingly reduced.
  • the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If it is greater than 55%, the opening degree of the electronic expansion valve of the outdoor unit is reduced again and the fan speed of the outdoor unit is reduced.
  • the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications.
  • the adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention.
  • the opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still greater than 55%, the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time.
  • the outdoor unit needs to be switched from the heating mode to the cooling mode, and then the opening degree of the electronic expansion valve of the outdoor unit and the fan speed of the outdoor unit are increased to increase the cooling indoor unit.
  • the third preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the third preset value in actual applications, as long as it is determined by the third preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is less than Or equal to the third preset value and greater than or equal to the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
  • the fourth preset value can be set to 45%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times.
  • the fourth preset value is not limited to 45%, and may also be other percentage values.
  • the boundary interval determined by the four preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is less than The fourth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. Still taking the fourth preset value of 45% as an example, that is, when the Rate is less than 45%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured.
  • the thermal effect is not as good as the cooling indoor unit.
  • the opening of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased. Therefore, the heat absorption of the outdoor unit's heat exchanger can be used to improve the heating of the indoor unit. Heating effect.
  • the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%).
  • the fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit.
  • the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still less than 45%, the electronic expansion of the outdoor unit is increased again.
  • Valve opening and increase fan speed of outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
  • the steps of "obtaining the cooling and heating effect load balance index of the air-conditioning system” specifically include: obtaining the total cooling load CoolLoad and the total heating load HeatLoad of all indoor units; calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating The ratio of the total heating load HeatLoad and the sum value (CoolLoad + HeatLoad) to obtain the cooling and heating effect load balance index Rate.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is less than a fifth preset value and the outdoor unit
  • the current operating mode is cooling mode, increase the opening of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit.
  • the fifth preset value can be set to 45%, that is, when Rate is less than 45%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling of the indoor unit is cooling. The effect is not as good as the heating effect of the indoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling of the indoor unit. effect.
  • the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%).
  • the fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate.
  • the electronic expansion of the outdoor unit is increased again.
  • Valve opening and increase fan speed of outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
  • the fifth preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the fifth preset value in actual applications, as long as it is determined by the fifth preset value.
  • the demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is greater than Or equal to the fifth preset value and less than or equal to the sixth preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
  • the sixth preset value can be set to 55%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times.
  • the sixth preset value is not limited to 55%, and may also be other percentage values.
  • the boundary interval determined by the six preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is greater than The sixth preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously acquired; and the air conditioning system is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operations.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Then reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the heating mode, increasing The opening degree of the electronic expansion valve increases the fan speed of the outdoor unit.
  • the multi-line air conditioning system determines that the heating indoor unit is a heating system.
  • the thermal effect is not as good as the cooling effect of the indoor unit. Because the outdoor unit is in the cooling mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat radiation of the outdoor unit is reduced, thereby improving the heating effect of the indoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%), and the fan speed of the outdoor unit is reduced.
  • the opening ratio of the electronic expansion valve of the outdoor unit correspondingly reduced, that is, after reducing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate, if Rate If it is still greater than 55%, reduce the opening degree of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit again.
  • the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention.
  • the opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still greater than 55%, the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is less than a seventh preset value and the outdoor unit The current operation mode of the heating unit is to continue to obtain the current state of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit; and to selectively adjust the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit.
  • the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the cooling mode, increasing the electronic The opening of the expansion valve increases the fan speed of the outdoor unit.
  • the seventh preset value of 45% as an example, that is, when Rate is less than 45%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good. Since the outdoor unit is in heating mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat absorption of the outdoor unit is reduced, thereby improving the cooling effect of the indoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%). The opening ratio of the electronic expansion valve of the outdoor unit is correspondingly reduced.
  • the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If it is less than 45%, the opening degree of the electronic expansion valve of the outdoor unit is reduced again and the fan speed of the outdoor unit is reduced.
  • the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications.
  • the adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention.
  • the opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still less than 45%, then the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time.
  • the outdoor unit needs to be switched from the heating mode to the cooling mode, and then the opening degree of the electronic expansion valve of the outdoor unit and the fan speed of the outdoor unit are increased to increase the cooling indoor unit.
  • the seventh preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the seventh preset value in actual applications, as long as it is determined by the third preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is greater than Or equal to the seventh preset value and less than or equal to the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
  • the eighth preset value can be set to 55%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times.
  • the eighth preset value is not limited to 55%, and may also be other percentage values.
  • the boundary interval determined by the eight preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
  • the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit” further includes: if the cooling and heating effect load balancing index Rate is greater than An eighth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. Still taking the eighth preset value of 55% as an example, that is, when Rate is greater than 55%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured.
  • the thermal effect is not as good as the cooling indoor unit.
  • the opening of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased. Therefore, the heat absorption of the outdoor unit's heat exchanger can be used to improve the heating of the indoor unit. Heating effect.
  • the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit.
  • the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%).
  • the fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit.
  • the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still greater than 55%, the electronic expansion of the outdoor unit is increased again.
  • Valve opening and increase fan speed of outdoor unit the opening degree of the electronic expansion valve of the outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open).
  • Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
  • the control method of the present invention further includes: obtaining a total cooling load and a total heating load of all the indoor units; and selecting an on mode of the outdoor unit according to the total cooling load and the total heating load.
  • the outdoor unit on mode can also be determined by directly comparing the total cooling load and the total heating load.
  • the steps of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” include: calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating the ratio of the total cooling load CoolLoad and the total value to obtain cooling
  • the heating effect load balance index Rate (the calculation method is the same as that of the first embodiment, which will not be repeated here); according to the cooling and heating effect load balance index Rate, an on mode of the outdoor unit is selected.
  • the step of “selecting the opening mode of the outdoor unit according to the cooling and heating effect load balancing index Rate” specifically includes: if the cooling and heating effect load balancing index Rate is greater than or equal to a ninth preset value, the outdoor unit uses cooling The mode is turned on; if the cooling and heating effect load balance index Rate is less than the ninth preset value, the outdoor unit is turned on in the heating mode.
  • the ninth preset value may be 50%, that is, when Rate is greater than 50%, the total cooling load of the indoor unit CoolLoad is greater than the total heating load HeatLoad, indicating that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the outdoor unit should be turned on in the cooling mode to improve the cooling effect of the indoor unit.
  • the rate is less than 50%
  • the total cooling load of the indoor unit CoolLoad is less than the total heating load HeatLoad, indicating the heating of the indoor unit.
  • the effect is not as good as the cooling effect of the cooling indoor unit.
  • the outdoor unit should be turned on in the heating mode, thereby improving the heating effect of the heating indoor unit.
  • the ninth preset value is not limited to 50%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the ninth preset value in actual applications, as long as the boundary determined by the ninth preset value is used.
  • the outdoor unit can be turned on in either the cooling mode or the heating mode. In this implementation, In the example, the outdoor unit is turned on in the cooling mode.
  • the steps of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” include: calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating the ratio of the total heating load HeatLoad to the total value to obtain The cooling and heating effect load balancing index Rate (the calculation method is the same as that in the second embodiment, which will not be repeated here); according to the cooling and heating effect load balancing index Rate, an on mode of the outdoor unit is selected.
  • the step of “selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index Rate” specifically includes: if the cooling and heating effect load balancing index Rate is greater than or equal to the tenth preset value, The thermal mode is turned on; if the cooling and heating effect load balance index Rate is less than the tenth preset value, the outdoor unit is turned on in the cooling mode.
  • the tenth preset value may be 50%, that is, when Rate is greater than 50%, the total heating load of the indoor unit, HeatLoad, is greater than the total cooling load, CoolLoad, indicating that the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit.
  • the outdoor unit should be turned on in the heating mode, so as to improve the heating effect of the heating indoor unit; and when Rate is less than 50%, the total heating load HeatLoad of the indoor unit is less than the total cooling load CoolLoad, indicating that the The cooling effect is not as good as the heating effect of a heating indoor unit.
  • the outdoor unit should be turned on in a cooling mode to improve the cooling effect of the cooling indoor unit.
  • the tenth preset value is not limited to 50%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the tenth preset value in actual applications, as long as the boundary determined by the tenth preset value is determined.
  • the outdoor unit can be turned on in either the cooling mode or the heating mode. In this implementation, In the example, the outdoor unit is turned on in a heating mode.
  • the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load” specifically includes: if the total cooling load is greater than or equal to the total heating load, the outdoor unit is turned on in the cooling mode; if the total cooling load is less than the heating Total load, the outdoor unit is turned on in heating mode.
  • the outdoor unit is connected to all cooling indoor units through valve box 1, and the outdoor unit is connected to all heating indoor units through valve box 2. It should be noted that the mode of valve box 1 and valve box 2 It can be different, but the indoor unit mode connected to the same valve box must be the same.
  • 2 # indoor unit and 8 # indoor unit are off, 1 # indoor unit, 3 # indoor unit, and 4 # indoor
  • the unit is in cooling mode, and the 5 # indoor unit, 6 # indoor unit, and 7 # indoor unit are in heating state.
  • the parameters of the indoor unit see Figure 3.
  • the first preset value is still 55% as an example.
  • Rate is greater than 55%, it means that the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad.
  • the multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
  • the opening degree of the electronic expansion valve of the large outdoor unit and the fan speed of the outdoor unit are increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling effect of the cooling indoor unit.

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Abstract

The present invention falls within the technical field of air conditioners, and aims to solve the problem that a control method for an existing multi-split air conditioning system cannot solve unbalanced refrigeration and heating effects during operation of the multi-split air conditioning system. Therefore, provided in the present invention is a control method for a multi-split air conditioning system. The multi-split air conditioning system comprises an outdoor unit and a plurality of indoor units connected to the outdoor unit. The control method comprises: acquiring a load balance index of refrigeration and heating effects of an air conditioning system and the current operating mode of the outdoor unit; and selectively adjusting a control operation of the air conditioning system according to the load balance index of the refrigeration and heating effects and the current operating mode of the outdoor unit. The method in the present invention aims to guarantee balance of the effects of all refrigeration indoor units and heating indoor units, and balance the heating effect of all the heating indoor units, and the refrigeration effect of all the refrigeration indoor units, while reducing the energy consumption of the air conditioning system is reduced as much as possible, enabling the multi-split air conditioning system to save more energy.

Description

用于多联机空调系统的控制方法Control method for multi-line air conditioning system 技术领域Technical field
本发明属于空调技术领域，具体提供一种用于多联机空调系统的控制方法。The invention belongs to the technical field of air conditioning, and specifically provides a control method for a multi-line air conditioning system.
背景技术Background technique
多联机空调系统是中央空调系统的一种，俗称“一拖多”，指的是一台室外机通过管路连接多个室内机，其在中小型建筑以及部分公共建筑中具有十分广泛的应用。Multi-connected air-conditioning system is a type of central air-conditioning system, commonly known as "one drag and more", which refers to an outdoor unit connected to multiple indoor units through pipes. It has a wide range of applications in small and medium-sized buildings and some public buildings. .
现有的多联机空调系统，其可以同时包括制冷的室内机和制热的室内机，这些室内机全部和室外机相连，这种空调系统的结构的弊端在于：室外机只能选择制冷模式和制热模式中的一种运行，这就使得多联机空调系统易发生制冷制热效果不均衡的问题。Existing multi-connected air-conditioning systems can include both cooling indoor units and heating indoor units, all of which are connected to outdoor units. The disadvantage of the structure of this type of air-conditioning system is that the outdoor unit can only choose the cooling mode and One operation in the heating mode, which makes the multi-line air conditioning system prone to the problem of uneven heating and cooling effects.
现有技术中，一般是将制冷室内机的容量和制热室内机的容量进行比较，然后对室外机的运行模式进行判断。然而，室外机如果按照制冷模式运行，室外机换热器会对外界释放热量以降低冷媒温度，这种方式有利于提高制冷室内机的制冷效果，但是会降低制热室内机的制热效果；反之，室外机如果按照制热模式运行，室外机换热器会向外界吸收热量以提高冷媒温度，这种方式有利于制热室内机的制热效果，但是会降低制冷室内机的制冷效果，虽然上述控制方式能够使制冷室内机和制热室内机均正常运转，但是无法保证制冷室内机和制热室内机效果的均衡性，一般只能侧重于一方，即保证制热室内机的制热效果就会影响制冷室内机的制冷效果，保证制冷室内机的制冷效果就会影响制热室内机的制热效果，无法做到兼顾所有室内机。也就是说，现有的多联机空调系统的控制方法无法解决在多联机空调系统运行中制冷制热效果不均衡的问题。In the prior art, the capacity of a refrigerating indoor unit and the capacity of a heating indoor unit are generally compared, and then the operation mode of the outdoor unit is determined. However, if the outdoor unit operates in a cooling mode, the outdoor unit heat exchanger will release heat to the outside to reduce the temperature of the refrigerant. This method is beneficial to improving the cooling effect of the cooling indoor unit, but will reduce the heating effect of the heating indoor unit; On the contrary, if the outdoor unit operates in the heating mode, the outdoor unit heat exchanger will absorb heat from the outside to increase the temperature of the refrigerant. This method is beneficial to the heating effect of the heating indoor unit, but it will reduce the cooling effect of the cooling indoor unit. Although the above control method can make both the cooling indoor unit and the heating indoor unit operate normally, the effect of the cooling indoor unit and the heating indoor unit cannot be guaranteed. Generally, only one side can be focused, that is, the heating of the heating indoor unit is guaranteed. The effect will affect the cooling effect of the refrigerating indoor unit, ensuring that the cooling effect of the refrigerating indoor unit will affect the heating effect of the heating indoor unit, and it is impossible to take into account all the indoor units. That is, the existing control method of the multi-connected air-conditioning system cannot solve the problem of uneven heating and cooling effects during the operation of the multi-connected air-conditioning system.
因此，本领域需要一种新的用于多联机空调系统的控制方法来解决上述问题。Therefore, there is a need in the art for a new control method for a multi-line air conditioning system to solve the above problems.
发明内容Summary of the Invention
为了解决现有技术中的上述问题，即为了解决现有的多联机空调系统的控制方法无法解决在多联机空调系统运行中制冷制热效果不均衡的问题，本发明提供了一种用于多联机空调系统的控制方法，该多联机空调系统包括室外机和与室外机相连的多个室内机，该控制方法包括：获取空调系统的制冷制热效果负荷均衡指数和室外机的当前运行模式；根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作。In order to solve the above problems in the prior art, that is, to solve the problem that the existing control method of the multi-connected air-conditioning system cannot solve the problem of uneven heating and cooling effects during the operation of the multi-connected air-conditioning system, the present invention provides a method for A control method for an on-line air conditioning system. The multi-online air conditioning system includes an outdoor unit and a plurality of indoor units connected to the outdoor unit. The control method includes: obtaining a cooling and heating effect load balancing index of the air conditioning system and a current operating mode of the outdoor unit; Selectively adjust the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit.
在上述控制方法的优选技术方案中，“获取空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：获取所有室内机的制冷总负荷和制热总负荷；计算制冷总负荷与制热总负荷的和值；计算制冷总负荷与和值的比值来获取制冷制热效果负荷均衡指数。In the preferred technical solution of the above control method, the step of "obtaining the cooling and heating effect load balance index of the air conditioning system" specifically includes: obtaining the total cooling load and the total heating load of all indoor units; calculating the total cooling load and the total heating load The sum of the loads; calculate the ratio of the total cooling load to the sum to obtain the cooling and heating effect load balance index.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数大于第一预设值并且室外机的当前运行模式为制冷模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" specifically includes: if the cooling and heating effect load balancing index Greater than the first preset value and the current operating mode of the outdoor unit is a cooling mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数小于或等于第一预设值且大于或等于第二预设值并且室外机的当前运行模式为制冷模式，则维持空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is less than or equal to the first preset value and greater than or equal to the second preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数小于第二预设值并且室外机的当前运行模式为制冷模式，则继续获取电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Less than the second preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioner is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operation of the system.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具 体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤还包括：如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制热模式，增大电子膨胀阀的开度并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the heating mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数大于第三预设值并且室外机的当前运行模式为制热模式，则继续获取室外机的电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" specifically includes: if the cooling and heating effect load balancing index Greater than the third preset value and the current operation mode of the outdoor unit is heating mode, the current status of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit is continued to be obtained; based on the current status of the electronic expansion valve and the fan of the outdoor unit, select Adjust the control operation of the air conditioning system.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤还包括：如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制冷模式，增大电子膨胀阀的开度并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the cooling mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数小于或等于第三预设值且大于或等于第四预设值并且室外机的当前运行模式为制热模式，则维持空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is less than or equal to the third preset value and greater than or equal to the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数小于第四预设值并 且室外机的当前运行模式为制热模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is smaller than the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“获取空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：获取所有室内机的制冷总负荷和制热总负荷；计算制冷总负荷与制热总负荷的和值；计算制热总负荷与和值的比值来获取制冷制热效果负荷均衡指数。In the preferred technical solution of the above control method, the step of "obtaining the cooling and heating effect load balance index of the air conditioning system" specifically includes: obtaining the total cooling load and the total heating load of all indoor units; calculating the total cooling load and the total heating load The sum of the loads; calculate the ratio of the total heating load to the sum to obtain the cooling and heating effect load balance index.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数小于第五预设值并且室外机的当前运行模式为制冷模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" specifically includes: if the cooling and heating effect load balancing index Less than the fifth preset value and the current operation mode of the outdoor unit is a cooling mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数大于或等于第五预设值且小于或等于第六预设值并且室外机的当前运行模式为制冷模式，则维持空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is greater than or equal to the fifth preset value and less than or equal to the sixth preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数大于第六预设值并且室外机的当前运行模式为制冷模式，则继续获取电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Greater than the sixth preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioner is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operation of the system.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤还包括：如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制热模式，增大电子膨胀阀的开度并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the heating mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数小于第七预设值并且室外机的当前运行模式为制热模式，则继续获取室外机的电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" specifically includes: if the cooling and heating effect load balancing index Less than the seventh preset value and the current operation mode of the outdoor unit is a heating mode, then the current status of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit continue to be obtained; based on the current status of the electronic expansion valve and the fan of the outdoor unit, select Adjust the control operation of the air conditioning system.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes: if the electronic expansion valve is not completely closed and the outdoor unit's When the fan is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the fan speed of the outdoor unit is reduced.
在上述控制方法的优选技术方案中，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤还包括：如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制冷模式，增大电子膨胀阀的开度并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further includes: if the electronic expansion valve is completely closed and the fan of the outdoor unit is closed In the stalled state, the operation mode of the outdoor unit is switched to the cooling mode, the opening degree of the electronic expansion valve is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数大于或等于第七预设值且小于或等于第八预设值并且室外机的当前运行模式为制热模式，则维持空调系统的控制操作。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is greater than or equal to the seventh preset value and less than or equal to the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数大于第八预设值并且室外机的当前运行模式为制热模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。In a preferred technical solution of the above control method, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index If it is greater than the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the opening degree of the electronic expansion valve of the outdoor unit is increased, and the fan speed of the outdoor unit is increased.
在上述控制方法的优选技术方案中，在室外机开启之前，控制方法还包括：获取所有室内机的制冷总负荷和制热总负荷；根据制冷总负荷和制热总负荷，选择室外机的开启模式。In a preferred technical solution of the above control method, before the outdoor unit is turned on, the control method further includes: obtaining a total cooling load and a total heating load of all the indoor units; and selecting the outdoor unit to be turned on according to the total cooling load and the total heating load. mode.
在上述控制方法的优选技术方案中，“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤包括：计算制冷总负荷与制 热总负荷的和值；计算制冷总负荷与和值的比值来获取制冷制热效果负荷均衡指数；根据制冷制热效果负荷均衡指数，选择室外机的开启模式。In a preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" includes: calculating the sum of the total cooling load and the total heating load; calculating the total cooling load and the The ratio of the sum value is used to obtain the cooling and heating effect load balancing index; according to the cooling and heating effect load balancing index, the outdoor unit's on mode is selected.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数，选择室外机的开启模式”的步骤具体包括：如果制冷制热效果负荷均衡指数大于或等于第九预设值，则室外机以制冷模式开启。In a preferred technical solution of the above control method, the step of "selecting an on mode of the outdoor unit according to the cooling and heating effect load balancing index" specifically includes: if the cooling and heating effect load balancing index is greater than or equal to a ninth preset value, The outdoor unit is turned on in cooling mode.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数，选择室外机的开启模式”的步骤还包括：如果制冷制热效果负荷均衡指数小于第九预设值，则室外机以制热模式开启。In a preferred technical solution of the above control method, the step of "selecting an on mode of the outdoor unit according to the cooling and heating effect load balancing index" further includes: if the cooling and heating effect load balancing index is less than a ninth preset value, the outdoor unit Turn on in heating mode.
在上述控制方法的优选技术方案中，“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤包括：计算制冷总负荷与制热总负荷的和值；计算制热总负荷与和值的比值来获取制冷制热效果负荷均衡指数；根据制冷制热效果负荷均衡指数，选择室外机的开启模式。In the preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" includes: calculating the sum of the total cooling load and the total heating load; calculating the total heating load Obtain the cooling and heating effect load balance index by the ratio with the sum value; according to the cooling and heating effect load balance index, select the on mode of the outdoor unit.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数，选择室外机的开启模式”的步骤具体包括：如果制冷制热效果负荷均衡指数大于或等于第十预设值，则室外机以制热模式开启。In a preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" specifically includes: if the cooling and heating effect load balancing index is greater than or equal to the tenth preset value, The outdoor unit is turned on in heating mode.
在上述控制方法的优选技术方案中，“根据制冷制热效果负荷均衡指数，选择室外机的开启模式”的步骤还包括：如果制冷制热效果负荷均衡指数小于第十预设值，则室外机以制冷模式开启。In a preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" further includes: if the cooling and heating effect load balancing index is less than the tenth preset value, the outdoor unit Turn on in cooling mode.
在上述控制方法的优选技术方案中，“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤具体包括：如果制冷总负荷大于或等于制热总负荷，则室外机以制冷模式开启。In a preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" specifically includes: if the total cooling load is greater than or equal to the total heating load, the outdoor unit uses cooling The mode is on.
在上述控制方法的优选技术方案中，“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤还包括：如果制冷总负荷小于制热总负荷，则室外机以制热模式开启。In a preferred technical solution of the above control method, the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" further includes: if the total cooling load is less than the total heating load, the outdoor unit is in a heating mode On.
本领域技术人员能够理解的是，在本发明的优选技术方案中，先获取空调系统的制冷制热效果负荷均衡指数和室外机的当前运行模式，然后通过制冷制热效果负荷均衡指数和室外机的当前运行模式来选择性地调整空调系统的控制操作，使得在多联机空调系统的室内机发生制冷制热不均衡的问题时，可以实时进行调节，从而保证所有制冷室内机和制热室内机效果的均衡性，并且兼顾所有制热室内机的制热效果 和所有制冷室内机的制冷效果，同时尽可能地降低空调系统的能耗，使多联机空调系统更加节能。Those skilled in the art can understand that in the preferred technical solution of the present invention, the cooling and heating effect load balancing index of the air conditioning system and the current operation mode of the outdoor unit are first obtained, and then the cooling and heating effect load balancing index and the outdoor unit are obtained. Current operating mode to selectively adjust the control operation of the air-conditioning system, so that when the indoor unit of the multi-line air-conditioning system has a problem of imbalanced cooling and heating, it can be adjusted in real time, thereby ensuring all cooling indoor units and heating indoor units The balance of effects, taking into account the heating effect of all heating indoor units and the cooling effect of all cooling indoor units, while reducing the energy consumption of the air conditioning system as much as possible, so that the multi-line air conditioning system is more energy efficient.
进一步地，通过制冷总负荷与制冷总负荷和制热总负荷之和的比值计算得出的制冷制热效果负荷均衡指数可以反馈制热室内机的制热效果和制冷室内机的制冷效果，即在制冷制热效果负荷均衡指数大于第一预设值并且当前室外机的运行模式为制冷模式时，说明此时制冷室内机的制冷效果不如制热室内机的制热效果，应该增大空调系统室外机侧的电子膨胀阀开度并提高室外机的风机转速，从而提高空调系统的制冷效果；在制冷制热效果负荷均衡指数小于或等于第一预设值且大于或等于第二预设值并且室外机的当前运行模式为制冷模式时，说明此时制冷室内机的制冷效果和制热室内机的制热效果比较均衡，维持在较佳水平，应该维持当前的控制操作，即整个空调系统不需要调整控制操作；在制冷制热效果负荷均衡指数小于第二预设值并且室外机的当前运行模式为制冷模式时，说明此时制热室内机的制热效果不如制冷室内机的制冷效果，首先应该减小空调系统室外机侧的电子膨胀阀开度并降低室外机的风机转速，从而降低空调系统的制冷效果，改善制热效果，如果直到电子膨胀阀完全关闭并且室外机的风机完全停转而制冷制热效果负荷均衡指数仍然小于第二预设值时，则需要将室外机由制冷模式调整为制热模式，并且增大电子膨胀阀开度并提高室外机的风机转速，从而进一步提高空调系统的制热效果。同理地，在制冷制热效果负荷均衡指数大于第三预设值并且室外机的当前运行模式为制热模式时，说明此时制冷室内机的制冷效果不如制热室内机的制热效果，首先应该减小空调系统室外机侧的电子膨胀阀开度并降低室外机的风机转速，从而降低空调系统的制热效果，改善制冷效果，如果直到电子膨胀阀完全关闭并且室外机的风机完全停转而制冷制热效果负荷均衡指数仍然大于第三预设值时，则需要将室外机由制热模式调整为制冷模式，并且增大电子膨胀阀开度并提高室外机的风机转速，从而进一步提高空调系统的制冷效果；在制冷制热效果负荷均衡指数小于或等于第三预设值且大于或等于第四预设值并且室外机的当前运行模式为制热模式，说明此时制冷室内机的制冷效果和制热室内机的制热效果比较均衡，维持在较佳水平，应该维持当前的控制操作，即整个空调系统不需要调整控制操作；在制冷制热 效果负荷均衡指数小于第四预设值并且室外机的当前运行模式为制热模式，说明此时制热室内机的制热效果不如制冷室内机的制冷效果，应该增大空调系统室外机侧的电子膨胀阀开度并提高室外机的风机转速，从而提高空调系统的制热效果。通过上述的控制方式，能够始终保证空调系统的制冷制热均衡性，即制冷室内机的制冷效果和制热室内机的制热效果的均衡性，从而达到兼顾所有室内机效果的目的，降低多联机空调系统的能耗，使多联机空调系统更加节能，提升用户体验。Further, the cooling and heating effect load balance index calculated by the ratio of the total cooling load to the sum of the total cooling load and the total heating load can feedback the heating effect of the heating indoor unit and the cooling effect of the cooling indoor unit, that is, When the load balance index of the cooling and heating effect is greater than the first preset value and the current operation mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time, and the air conditioning system should be increased The opening degree of the electronic expansion valve on the outdoor unit side and the fan speed of the outdoor unit are increased, thereby improving the cooling effect of the air conditioning system; the load balancing index in the cooling and heating effect is less than or equal to the first preset value and greater than or equal to the second preset value And when the current operation mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are relatively balanced at this time and maintained at a better level. The current control operation should be maintained, that is, the entire air conditioning system. No need to adjust the control operation; the load balance index of the cooling and heating effect is less than the second preset value and the outdoor unit's current When the row mode is cooling mode, it means that the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit. First, the opening of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced. Reduce the cooling effect of the air conditioning system and improve the heating effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped and the cooling and heating effect load balance index is still less than the second preset value, the outdoor unit needs to be replaced by The cooling mode is adjusted to the heating mode, and the opening degree of the electronic expansion valve is increased and the fan speed of the outdoor unit is increased, thereby further improving the heating effect of the air conditioning system. Similarly, when the load balance index of the cooling and heating effect is greater than the third preset value and the current operation mode of the outdoor unit is the heating mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time. First, the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced to reduce the heating effect of the air conditioning system and improve the cooling effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped In turn, when the cooling and heating effect load balance index is still greater than the third preset value, it is necessary to adjust the outdoor unit from the heating mode to the cooling mode, and increase the opening degree of the electronic expansion valve and increase the fan speed of the outdoor unit, thereby further Improve the cooling effect of the air conditioning system; the load balance index of the cooling and heating effect is less than or equal to the third preset value and greater than or equal to the fourth preset value and the current operating mode of the outdoor unit is the heating mode, indicating that the indoor unit of the cooling unit is at this time The cooling effect and heating effect of the heating indoor unit are relatively balanced and maintained at a better level, and the current control should be maintained Operation, that is, the entire air conditioning system does not need to adjust the control operation; the load balance index of the cooling and heating effect is less than the fourth preset value and the current operation mode of the outdoor unit is the heating mode, indicating that the heating effect of the heating indoor unit is not as good at this time The cooling effect of a refrigerating indoor unit should increase the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and increase the fan speed of the outdoor unit, thereby improving the heating effect of the air conditioning system. Through the above-mentioned control method, the cooling and heating balance of the air-conditioning system can always be ensured, that is, the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are balanced, thereby achieving the purpose of taking into account the effects of all indoor units and reducing The energy consumption of the online air-conditioning system makes the multi-line air-conditioning system more energy efficient and improves the user experience.
更进一步地，作为上述方式的另一种替代方式，通过制热总负荷与制冷总负荷和制热总负荷之和的比值计算得出的制冷制热效果负荷均衡指数可以反馈制热室内机的制热效果和制冷室内机的制冷效果，即在制冷制热效果负荷均衡指数小于第五预设值并且当前室外机的运行模式为制冷模式时，说明此时制冷室内机的制冷效果不如制热室内机的制热效果，应该增大空调系统室外机侧的电子膨胀阀开度并提高室外机的风机转速，从而提高空调系统的制冷效果；在制冷制热效果负荷均衡指数大于或等于第五预设值且小于或等于第六预设值并且室外机的当前运行模式为制冷模式时，说明此时制冷室内机的制冷效果和制热室内机的制热效果比较均衡，维持在较佳水平，应该维持当前的控制操作，即整个空调系统不需要调整控制操作；在制冷制热效果负荷均衡指数大于第六预设值并且室外机的当前运行模式为制冷模式时，说明此时制热室内机的制热效果不如制冷室内机的制冷效果，首先应该减小空调系统室外机侧的电子膨胀阀开度并降低室外机的风机转速，从而降低空调系统的制冷效果，改善制热效果，如果直到电子膨胀阀完全关闭并且室外机的风机完全停转而制冷制热效果负荷均衡指数仍然大于第六预设值时，则需要将室外机由制冷模式调整为制热模式，并且增大电子膨胀阀开度并提高室外机的风机转速，从而进一步提高空调系统的制热效果。同理地，在制冷制热效果负荷均衡指数小于第七预设值并且室外机的当前运行模式为制热模式时，说明此时制冷室内机的制冷效果不如制热室内机的制热效果，首先应该减小空调系统室外机侧的电子膨胀阀开度并降低室外机的风机转速，从而降低空调系统的制热效果，改善制冷效果，如果直到电子膨胀阀完全关闭并且室外机的风机完全停转而制冷制热效果负荷均衡指数仍然小于第七预设值时，则需要将室外机由制热模式调整 为制冷模式，并且增大电子膨胀阀开度并提高室外机的风机转速，从而进一步提高空调系统的制冷效果；在制冷制热效果负荷均衡指数大于或等于第七预设值且小于或等于第八预设值并且室外机的当前运行模式为制热模式，说明此时制冷室内机的制冷效果和制热室内机的制热效果比较均衡，维持在较佳水平，应该维持当前的控制操作，即整个空调系统不需要调整控制操作；在制冷制热效果负荷均衡指数大于第八预设值并且室外机的当前运行模式为制热模式，说明此时制热室内机的制热效果不如制冷室内机的制冷效果，应该增大空调系统室外机侧的电子膨胀阀开度并提高室外机的风机转速，从而提高空调系统的制热效果。与上述类似地，通过这样的控制方式，能够始终保证空调系统的制冷制热均衡性，即制冷室内机的制冷效果和制热室内机的制热效果的均衡性，从而达到兼顾所有室内机效果的目的，降低多联机空调系统的能耗，使多联机空调系统更加节能，提升用户体验。Furthermore, as another alternative of the above method, the cooling and heating effect load balance index calculated by the ratio of the total heating load to the total cooling load and the sum of the total heating load can be fed back to the heating indoor unit. The heating effect and the cooling effect of the cooling indoor unit, that is, when the load balance index of the cooling and heating effect is less than the fifth preset value and the current operating mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating at this time. The heating effect of the indoor unit should increase the opening of the electronic expansion valve on the outdoor unit side of the air conditioning system and increase the fan speed of the outdoor unit, thereby improving the cooling effect of the air conditioning system; the load balancing index of the cooling and heating effect is greater than or equal to the fifth When the preset value is less than or equal to the sixth preset value and the current operating mode of the outdoor unit is the cooling mode, it means that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are relatively balanced at this time and maintained at a better level , The current control operation should be maintained, that is, the entire air-conditioning system does not need to adjust the control operation; When it is greater than the sixth preset value and the current operation mode of the outdoor unit is the cooling mode, it means that the heating effect of the heating indoor unit at this time is not as good as the cooling effect of the cooling indoor unit. First, the electronic expansion valve on the outdoor unit side of the air conditioning system should be reduced. Opening and reduce the fan speed of the outdoor unit, thereby reducing the cooling effect of the air conditioning system and improving the heating effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped, the cooling and heating effect load balance index is still greater than the sixth When the value is preset, it is necessary to adjust the outdoor unit from the cooling mode to the heating mode, and increase the opening degree of the electronic expansion valve and increase the fan speed of the outdoor unit, thereby further improving the heating effect of the air conditioning system. Similarly, when the load balance index of the cooling and heating effect is less than the seventh preset value and the current operation mode of the outdoor unit is the heating mode, it means that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit at this time. First, the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and the fan speed of the outdoor unit should be reduced to reduce the heating effect of the air conditioning system and improve the cooling effect. If the electronic expansion valve is completely closed and the fan of the outdoor unit is completely stopped When the cooling and heating effect load balance index is still less than the seventh preset value, the outdoor unit needs to be adjusted from the heating mode to the cooling mode, and the opening degree of the electronic expansion valve and the fan speed of the outdoor unit are increased, thereby further Improve the cooling effect of the air conditioning system; the load balance index of the cooling and heating effect is greater than or equal to the seventh preset value and less than or equal to the eighth preset value and the current operating mode of the outdoor unit is the heating mode, indicating that the indoor unit of the cooling unit is at this time The cooling effect and heating effect of the heating indoor unit are relatively balanced and maintained at a better level, and the current control should be maintained Operation, that is, the entire air-conditioning system does not need to adjust the control operation; the load balance index of the cooling and heating effect is greater than the eighth preset value and the current operation mode of the outdoor unit is the heating mode, indicating that the heating effect of the heating indoor unit is not as good at this time The cooling effect of a refrigerating indoor unit should increase the opening degree of the electronic expansion valve on the outdoor unit side of the air conditioning system and increase the fan speed of the outdoor unit, thereby improving the heating effect of the air conditioning system. Similar to the above, through such a control method, the cooling and heating balance of the air-conditioning system can be ensured at all times, that is, the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are balanced, thereby achieving the effects of all indoor units. The purpose is to reduce the energy consumption of the multi-connected air-conditioning system, make the multi-connected air-conditioning system more energy efficient, and improve the user experience.
再进一步地，在室外机开启之前，可以通过制冷总负荷与制冷总负荷和制热总负荷之和的比值计算得出的制冷制热效果负荷均衡指数，再通过制冷制热效果负荷均衡指数来选择室外机的开启模式，如果制冷制热效果负荷均衡指数大于或等于第九预设值，说明此时室内机的制冷总负荷大于制热总负荷，即制冷室内机的制冷效果不如制热室内机的制热效果，室外机应该以制冷模式开启；反之，如果制冷制热效果负荷均衡指数小于第九预设值，说明此时室内机的制冷总负荷小于制热总负荷，即制热室内机的制热效果不如制冷室内机的制冷效果，室外机应该以制热模式开启。替代性地，还可以通过制热总负荷与制冷总负荷和制热总负荷之和的比值计算得出的制冷制热效果负荷均衡指数，再通过制冷制热效果负荷均衡指数来选择室外机的开启模式，如果制冷制热效果负荷均衡指数大于或等于第十预设值，说明此时室内机的制热总负荷大于制冷总负荷，即制热室内机的制热效果不如制冷室内机的制冷效果，室外机应该以制热模式开启；反之，如果制冷制热效果负荷均衡指数小于第十预设值，说明此时室内机的制热总负荷小于制冷总负荷，即制冷室内机的制冷效果不如制热室内机的制热效果，室外机应该以制冷模式开启。除了上述采用制冷制热效果负荷均衡指数与预设值比较的方式之外，还可以采用直接将制冷总负荷和制热总负荷相比较的方式，即如果 室内机的制冷总负荷大于制热总负荷，说明制冷室内机的制冷效果不如制热室内机的制热效果，此时室外机应该以制冷模式开启，进而改善制冷室内机的制冷效果，如果室内机的制冷总负荷等于制热总负荷，说明制冷室内机的制冷效果与制热室内机的制热效果非常均衡，此时室外机可以直接以制冷模式开启，如果室内机的制冷总负荷小于制热总负荷，说明制热室内机的制热效果不如制冷室内机的制冷效果，此时室外机应该以制热模式开启，进而改善制热室内机的制热效果。通过这样的控制方式，使得在室外机开启之前，就已经通过判断来选择最佳的开启模式，在室外机开启之后，可以马上改善室内机的制冷/制热效果，使多联机空调系统的制冷制热保持均衡或者以最快的速度达到均衡，从而降低多联机空调系统的能耗，进而使多联机空调系统更加节能，提升用户体验。Furthermore, before the outdoor unit is turned on, the cooling and heating effect load balance index calculated by the ratio of the total cooling load and the sum of the total cooling load and the total heating load can be calculated by the cooling and heating effect load balance index. Select the on mode of the outdoor unit. If the load balance index of the cooling and heating effect is greater than or equal to the ninth preset value, it means that the total cooling load of the indoor unit is greater than the total heating load, that is, the cooling effect of the cooling indoor unit is not as good as that of the heating room. The outdoor unit's heating effect should be turned on in cooling mode. On the contrary, if the load balance index of the cooling and heating effect is less than the ninth preset value, it means that the total cooling load of the indoor unit is less than the total heating load, that is, the heating room. The heating effect of the unit is not as good as the cooling effect of the indoor unit. The outdoor unit should be turned on in the heating mode. Alternatively, the cooling and heating effect load balance index calculated by the ratio of the total heating load to the total cooling load and the sum of the total heating load can be selected, and then the outdoor heating On mode, if the cooling and heating effect load balance index is greater than or equal to the tenth preset value, it means that the total heating load of the indoor unit is greater than the total cooling load, that is, the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit. Effect, the outdoor unit should be turned on in heating mode; on the contrary, if the load balance index of the cooling and heating effect is less than the tenth preset value, it means that the total heating load of the indoor unit at this time is less than the total cooling load, that is, the cooling effect of the cooling indoor unit Not as good as the heating effect of the indoor unit. The outdoor unit should be turned on in cooling mode. In addition to the above-mentioned method of comparing the cooling and heating effect load balance index with a preset value, a method of directly comparing the total cooling load and the total heating load may also be adopted, that is, if the total cooling load of the indoor unit is greater than the total heating The load indicates that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit. At this time, the outdoor unit should be turned on in the cooling mode to improve the cooling effect of the cooling indoor unit. If the total cooling load of the indoor unit is equal to the total heating load It shows that the cooling effect of the cooling indoor unit is very balanced with the heating effect of the heating indoor unit. At this time, the outdoor unit can be directly turned on in the cooling mode. If the total cooling load of the indoor unit is less than the total heating load, it means that the The heating effect is not as good as the cooling effect of a cooling indoor unit. At this time, the outdoor unit should be turned on in a heating mode to improve the heating effect of the heating indoor unit. Through this control method, before the outdoor unit is turned on, the optimal opening mode has been selected through judgment. After the outdoor unit is turned on, the cooling / heating effect of the indoor unit can be improved immediately, and the cooling of the multi-line air conditioning system can be achieved. The heating is kept balanced or the equilibrium is reached at the fastest speed, thereby reducing the energy consumption of the multi-line air conditioning system, thereby making the multi-line air conditioning system more energy efficient and improving the user experience.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的多联机空调系统的控制方法的流程图；1 is a flowchart of a control method of a multi-connected air-conditioning system according to the present invention;
图2是本发明的实施例六中室外机与室内机的连接示意图；2 is a schematic diagram of a connection between an outdoor unit and an indoor unit in Embodiment 6 of the present invention;
图3是本发明的实施例六中室内机的参数表。FIG. 3 is a parameter table of the indoor unit in the sixth embodiment of the present invention.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
需要说明的是，在本发明的描述中，术语“第一”、“第二”、“第三”、“第四”、“第五”、“第六”、“第七”、“第八”、“第九”、“第十”仅用于描述目的，而不能理解为指示或暗示相对重要性。It should be noted that, in the description of the present invention, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "first "Eighth", "Ninth", and "Tenth" are used for descriptive purposes only and cannot be interpreted as indicating or implying relative importance.
基于背景技术指出的现有的多联机空调系统的控制方法无法解决在多联机空调系统运行中制冷制热效果不均衡的问题，本发明提供了一种用于多联机空调系统的控制方法，旨在保证所有制冷室内机和制热室内机效果的均衡性，并且兼顾所有制热室内机的制热效果和所有制冷室内机的制冷效果，同时尽可能地降低空调系统的能耗，使多联机空调系统更加节能。Based on the prior art multi-connected air-conditioning system control method pointed out in the background, the problem of uneven heating and cooling effects during the operation of the multi-connected air-conditioning system cannot be solved. The present invention provides a control method for a multi-connected air-conditioning system. While ensuring the balance of the effects of all cooling indoor units and heating indoor units, and taking into account the heating effects of all heating indoor units and the cooling effects of all cooling indoor units, at the same time reducing the energy consumption of the air conditioning system as much as possible, and enabling multi-line air conditioning The system is more energy efficient.
具体地，本发明的多联机空调系统包括室外机和与室外机相连的多个室内机，如图1所示，本发明的控制方法包括：获取空调系统的制冷制热效果负荷均衡指数和室外机的当前运行模式；根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作。其中，本发明所指的制冷制热效果负荷均衡指数也可以称为制冷制热效果负荷均衡率，即通过室内机的制冷总负荷和制热总负荷来计算得出，在实际应用中，可以先计算室内机的制冷总负荷和制热总负荷的和值，然后再通过制冷总负荷与该和值的比值来得出制冷制热效果负荷均衡指数，亦或者通过制热总负荷与该和值的比值来得出制冷制热效果负荷均衡指数。此外，在本发明中，室内机的制冷总负荷的计算方式为：计算所有制冷室内机中每个制冷室内机的制冷负荷，每个制冷室内机的制冷负荷为室内机容量(匹数)HP×(实际温度CurTemp-设定温度SetTemp)，因而所有制冷室内机的制冷总负荷CoolLoad＝∑[(CurTemp-SetTemp)×HP]；同理，室内机的制热总负荷的计算方式为：计算所有制热室内机中每个制热室内机的制热负荷，每个制热室内机的制热负荷为室内机容量(匹数)HP×(设定温度SetTemp-实际温度CurTemp)，因而所有制热室内机的制热总负荷HeatLoad＝∑[(SetTemp-CurTemp)×HP]。下面分别以制冷总负荷CoolLoad与制冷总负荷CoolLoad和制热总负荷HeatLoad之和的比值得出的制冷制热效果负荷均衡指数(即制冷制热效果负荷均衡指数Rate＝CoolLoad/(CoolLoad+HeatLoad))以及制热总负荷HeatLoad与制冷总负荷CoolLoad和制热总负荷HeatLoad之和的比值得出的制冷制热效果负荷均衡指数(即制冷制热效果负荷均衡指数Rate＝HeatLoad/(CoolLoad+HeatLoad))两个方面，详细地阐述本发明的技术方案。Specifically, the multi-connected air-conditioning system of the present invention includes an outdoor unit and multiple indoor units connected to the outdoor unit. As shown in FIG. 1, the control method of the present invention includes: obtaining a cooling and heating effect load balance index of the air-conditioning system and outdoor The current operation mode of the air conditioner; selectively adjusts the control operation of the air conditioning system according to the cooling and heating effect load balance index and the current operation mode of the outdoor unit. Among them, the cooling and heating effect load balancing index referred to in the present invention can also be referred to as the cooling and heating effect load balancing rate, that is, calculated from the total cooling load and total heating load of the indoor unit. In practical applications, First calculate the sum of the total cooling load and the total heating load of the indoor unit, and then calculate the cooling and heating effect load balance index by the ratio of the total cooling load and the sum, or use the total heating load and the sum To obtain the cooling and heating effect load balance index. In addition, in the present invention, the total cooling load of the indoor unit is calculated by calculating the cooling load of each cooling indoor unit in all the cooling indoor units, and the cooling load of each cooling indoor unit is the indoor unit capacity (horsepower) HP × (actual temperature CurTemp-set temperature SetTemp), so the total cooling load of all cooling indoor units CoolLoad = Σ [(CurTemp-SetTemp) × HP]; Similarly, the calculation method of total heating load of indoor units is: The heating load of each heating indoor unit among all heating indoor units, and the heating load of each heating indoor unit is the indoor unit capacity (number of horses) HP × (set temperature SetTemp-actual temperature CurTemp), so all heating The total heating load of the indoor unit, HeatLoad = [[SetTemp-CurTemp) × HP]. The cooling and heating effect load balance index (i.e., cooling and heating effect load balance index Rate = CoolLoad / (CoolLoad + HeatLoad)) is based on the ratio of the total cooling load CoolLoad, the total cooling load CoolLoad, and the total heating load HeatLoad. ) And the ratio of the total heating load HeatLoad to the total cooling load CoolLoad and the total heating load HeatLoad is worth the cooling and heating effect load balancing index (that is, the cooling and heating effect load balancing index Rate = HeatLoad / (CoolLoad + HeatLoad) ) Two aspects, the technical solution of the present invention is explained in detail.
实施例一Example one
“获取空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：获取所有室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad；计算制冷总负荷CoolLoad与制热总负荷HeatLoad的和值；计算制冷总负荷CoolLoad与和值(CoolLoad+HeatLoad)的比值来获取制冷制热效果负荷均衡指数Rate。The steps of "obtaining the cooling and heating effect load balance index of the air-conditioning system" specifically include: obtaining the total cooling load CoolLoad and the total heating load HeatLoad of all indoor units; calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating The ratio of the total cooling load CoolLoad and the sum value (CoolLoad + HeatLoad) to obtain the cooling and heating effect load balance index Rate.
“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate大于第一预设值并且室外机的当前运行模式为制冷模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。其中，第一预设值可以设定为55％，即当Rate大于55％时，室内机的制冷总负荷CoolLoad高于制热总负荷HeatLoad较多，多联机空调系统判断为制冷室内机的制冷效果不如制热室内机的制热效果，此时应增大室外机的电子膨胀阀的开度，并提高室外机的风机转速，从而利用室外机换热器的散热来提高制冷室内机的制冷效果。其中，室外机的风机转速应该参照室外机的电子膨胀阀开度比率进行调整。在实际应用中，室外机的电子膨胀阀的开度优选为每次增大5％(全开为100％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地提高，即在每次增大室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然大于55％，则再一次增大室外机的电子膨胀阀开度并提高室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于增大5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次增大的百分比数值各不相同，甚至在极端情况下可以直接一次增大至100％(即室外机的电子膨胀阀全开)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次增大的开度，这种每次电子膨胀阀开度增大的具体百分比数值的调整或改变不构成对本发明的限制。此外，第一预设值也不限于55％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第一预设值的具体数值，只要通过第一预设值确定的分界点能够判定制冷室内机的制冷效果不如制热室内机的制热效果即可。The step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is greater than the first preset value and the outdoor unit The current operating mode is cooling mode, increase the opening of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. The first preset value can be set to 55%, that is, when Rate is greater than 55%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling of the indoor unit is cooling. The effect is not as good as the heating effect of the indoor unit. At this time, the opening degree of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling of the indoor unit. effect. Among them, the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%). The fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still greater than 55%, the electronic expansion of the outdoor unit is increased again. Valve opening and increase fan speed of outdoor unit. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention. In addition, the first preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the first preset value in actual applications, as long as it is determined by the first preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate小于或等于第一预设值且大于或等于第二预设值并且室外机的当前运行模式为制冷模式，则维持空调系统的控制操作。仍以第一预设值为55％为例，其中，第二预设值可以设定为45％，即当Rate大于或等于45％且小于或等于55％时，室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad相差不多，多联机空 调系统判断为制冷室内机的制冷效果和制热室内机的制热效果基本处于均衡状态，因此多联机空调系统不必进行任何控制操作，使多联机空调系统始终保持在该均衡状态。此外，第二预设值也不限于45％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第二预设值的具体数值，只要通过第一预设值和第二预设值共同确定的分界区间能够判定制冷室内机的制冷效果和制热室内机的制热效果处于均衡状态即可。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is less than Or equal to the first preset value and greater than or equal to the second preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained. Still taking the first preset value of 55% as an example, wherein the second preset value can be set to 45%, that is, when the Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times. In addition, the second preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the second preset value in actual applications, as long as the first preset value and the first preset value are passed. The boundary interval determined by the two preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate小于第二预设值并且室外机的当前运行模式为制冷模式，则继续获取电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。具体而言，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速；如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制热模式，增大电子膨胀阀的开度并提高室外机的风机转速。仍以第二预设值为45％为例，即当Rate小于45％时，室内机的制热总负荷HeatLoad高于制冷总负荷CoolLoad较多，多联机空调系统判断为制热室内机的制热效果不如制冷室内机的制冷效果，由于此时室外机处于制冷模式，因此优先采用减小室外机的电子膨胀阀的开度，并降低室外机的风机转速的方式来使室外机换热器的散热降低，从而改善制热室内机的制热效果，在实际应用中，室外机的电子膨胀阀的开度优选为每次减小5％(全闭为0％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地降低，即在每次减小室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然小于45％，则再一次减小室外机的电子膨胀阀开度并降低室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于减小5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次减小的百分比数值各不相同，甚至在极端情况下可以直接一次减小至0％(即室外机的电子膨胀阀全闭)，本 领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次减小的开度，这种每次电子膨胀阀开度减小的具体百分比数值的调整或改变不构成对本发明的限制。在室外机的电子膨胀阀的开度减小至0％，即室外机的电子膨胀阀完全关闭(由于室外机的风机随着室外机的电子膨胀阀的开度比率进行转速调整，在室外机的电子膨胀阀完全关闭时，原则上室外机的风机处于停转状态)后，如果Rate还是小于45％，则此时无法再通过减小电子膨胀阀开度并降低室外机的风机转速的方式来提高制热室内机的制热效果，这时候需要将室外机由制冷模式切换至制热模式，然后增大室外机的电子膨胀阀的开度并提高室外机的风机转速的方式来提高制热室内机的制热效果。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is less than The second preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously obtained; and the air conditioning system is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operations. Specifically, the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Then reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the heating mode, increasing The opening degree of the electronic expansion valve increases the fan speed of the outdoor unit. Still taking the second preset value of 45% as an example, that is, when the Rate is less than 45%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured. The thermal effect is not as good as the cooling effect of the indoor unit. Because the outdoor unit is in the cooling mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat radiation of the outdoor unit is reduced, thereby improving the heating effect of the indoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%), and the fan speed of the outdoor unit is reduced. With the opening ratio of the electronic expansion valve of the outdoor unit correspondingly reduced, that is, after reducing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate, if Rate If it is still less than 45%, reduce the opening degree of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit again. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention. The opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still less than 45%, then the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time. To improve the heating effect of the heating indoor unit, you need to switch the outdoor unit from the cooling mode to the heating mode, and then increase the opening of the electronic expansion valve of the outdoor unit and increase the fan speed of the outdoor unit to improve the heating. Heating effect of thermal indoor unit.
“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate大于第三预设值并且室外机的当前运行模式为制热模式，则继续获取室外机的电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。具体而言，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速；如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制冷模式，增大电子膨胀阀的开度并提高室外机的风机转速。以第三预设值为55％为例，即当Rate大于55％时，室内机的制冷总负荷CoolLoad高于制热总负荷HeatLoad较多，多联机空调系统判断为制冷室内机的制冷效果不如制热室内机的制热效果，由于此时室外机处于制热模式，因此优先采用减小室外机的电子膨胀阀的开度，并降低室外机的风机转速的方式来使室外机换热器的吸热降低，从而改善制冷室内机的制冷效果，在实际应用中，室外机的电子膨胀阀的开度优选为每次减小5％(全闭为0％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地降低，即在每次减小室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然大于55％，则再一次减小室外机的电子膨胀阀开度并降低室外机的风机转速。当然，室外机的电子膨胀 阀的开度每次不限于减小5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次减小的百分比数值各不相同，甚至在极端情况下可以直接一次减小至0％(即室外机的电子膨胀阀全闭)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次减小的开度，这种每次电子膨胀阀开度减小的具体百分比数值的调整或改变不构成对本发明的限制。在室外机的电子膨胀阀的开度减小至0％，即室外机的电子膨胀阀完全关闭(由于室外机的风机随着室外机的电子膨胀阀的开度比率进行转速调整，在室外机的电子膨胀阀完全关闭时，原则上室外机的风机处于停转状态)后，如果Rate还是大于55％，则此时无法再通过减小电子膨胀阀开度并降低室外机的风机转速的方式来提高制冷室内机的制冷效果，这时候需要将室外机由制热模式切换至制冷模式，然后增大室外机的电子膨胀阀的开度并提高室外机的风机转速的方式来提高制冷室内机的制冷效果。此外，第三预设值也不限于55％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第三预设值的具体数值，只要通过第三预设值确定的分界点能够判定制冷室内机的制冷效果不如制热室内机的制热效果即可。The step of “selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is greater than a third preset value and the outdoor unit The current operation mode of the heating unit is to continue to obtain the current state of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit; and to selectively adjust the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit. Specifically, the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the cooling mode, increasing the electronic The opening of the expansion valve increases the fan speed of the outdoor unit. Take the third preset value of 55% as an example, that is, when Rate is greater than 55%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good. Since the outdoor unit is in heating mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat absorption of the outdoor unit is reduced, thereby improving the cooling effect of the indoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%). The opening ratio of the electronic expansion valve of the outdoor unit is correspondingly reduced. That is, after reducing the opening of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If it is greater than 55%, the opening degree of the electronic expansion valve of the outdoor unit is reduced again and the fan speed of the outdoor unit is reduced. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention. The opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still greater than 55%, the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time. To improve the cooling effect of the cooling indoor unit, the outdoor unit needs to be switched from the heating mode to the cooling mode, and then the opening degree of the electronic expansion valve of the outdoor unit and the fan speed of the outdoor unit are increased to increase the cooling indoor unit. Cooling effect. In addition, the third preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the third preset value in actual applications, as long as it is determined by the third preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate小于或等于第三预设值且大于或等于第四预设值并且室外机的当前运行模式为制热模式，则维持空调系统的控制操作。仍以第三预设值为55％为例，其中，第四预设值可以设定为45％，即当Rate大于或等于45％且小于或等于55％时，室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad相差不多，多联机空调系统判断为制冷室内机的制冷效果和制热室内机的制热效果基本处于均衡状态，因此多联机空调系统不必进行任何控制操作，使多联机空调系统始终保持在该均衡状态。此外，第四预设值也不限于45％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第四预设值的具体数值，只要通过第三预设值和第四预设值共同确定的分界区间能够判定制冷室内机的制冷效果和制热室内机的制热效果处于均衡状态即可。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is less than Or equal to the third preset value and greater than or equal to the fourth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained. Still taking the third preset value of 55% as an example, wherein the fourth preset value can be set to 45%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times. In addition, the fourth preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set specific values of the fourth preset value in actual applications, as long as the third preset value and the first preset value are passed. The boundary interval determined by the four preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate小于第四预设值并且室外机的当前运行模式为制热模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。仍以第四预设值为45％为例，即当Rate小于45％时，室内机的制热总负荷HeatLoad高于制冷总负荷CoolLoad较多，多联机空调系统判断为制热室内机的制热效果不如制冷室内机的制冷效果，此时应增大室外机的电子膨胀阀的开度，并提高室外机的风机转速，从而利用室外机换热器的吸热来提高制热室内机的制热效果。其中，室外机的风机转速应该参照室外机的电子膨胀阀开度比率进行调整。在实际应用中，室外机的电子膨胀阀的开度优选为每次增大5％(全开为100％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地提高，即在每次增大室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然小于45％，则再一次增大室外机的电子膨胀阀开度并提高室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于增大5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次增大的百分比数值各不相同，甚至在极端情况下可以直接一次增大至100％(即室外机的电子膨胀阀全开)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次增大的开度，这种每次电子膨胀阀开度增大的具体百分比数值的调整或改变不构成对本发明的限制。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operating mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is less than The fourth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. Still taking the fourth preset value of 45% as an example, that is, when the Rate is less than 45%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured. The thermal effect is not as good as the cooling indoor unit. At this time, the opening of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased. Therefore, the heat absorption of the outdoor unit's heat exchanger can be used to improve the heating of the indoor unit. Heating effect. Among them, the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%). The fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still less than 45%, the electronic expansion of the outdoor unit is increased again. Valve opening and increase fan speed of outdoor unit. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
实施例二Example two
“获取空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：获取所有室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad；计算制冷总负荷CoolLoad与制热总负荷HeatLoad的和值；计算制热总负荷HeatLoad与和值(CoolLoad+HeatLoad)的比值来获取制冷制热效果负荷均衡指数Rate。The steps of "obtaining the cooling and heating effect load balance index of the air-conditioning system" specifically include: obtaining the total cooling load CoolLoad and the total heating load HeatLoad of all indoor units; calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating The ratio of the total heating load HeatLoad and the sum value (CoolLoad + HeatLoad) to obtain the cooling and heating effect load balance index Rate.
“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate小于第五预设值并且室外机的当前运行模式为制冷模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转 速。其中，第五预设值可以设定为45％，即当Rate小于45％时，室内机的制冷总负荷CoolLoad高于制热总负荷HeatLoad较多，多联机空调系统判断为制冷室内机的制冷效果不如制热室内机的制热效果，此时应增大室外机的电子膨胀阀的开度，并提高室外机的风机转速，从而利用室外机换热器的散热来提高制冷室内机的制冷效果。其中，室外机的风机转速应该参照室外机的电子膨胀阀开度比率进行调整。在实际应用中，室外机的电子膨胀阀的开度优选为每次增大5％(全开为100％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地提高，即在每次增大室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然小于45％，则再一次增大室外机的电子膨胀阀开度并提高室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于增大5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次增大的百分比数值各不相同，甚至在极端情况下可以直接一次增大至100％(即室外机的电子膨胀阀全开)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次增大的开度，这种每次电子膨胀阀开度增大的具体百分比数值的调整或改变不构成对本发明的限制。此外，第五预设值也不限于45％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第五预设值的具体数值，只要通过第五预设值确定的分界点能够判定制冷室内机的制冷效果不如制热室内机的制热效果即可。The step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is less than a fifth preset value and the outdoor unit The current operating mode is cooling mode, increase the opening of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. The fifth preset value can be set to 45%, that is, when Rate is less than 45%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling of the indoor unit is cooling. The effect is not as good as the heating effect of the indoor unit. At this time, the opening degree of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling of the indoor unit. effect. Among them, the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%). The fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still less than 45%, the electronic expansion of the outdoor unit is increased again. Valve opening and increase fan speed of outdoor unit. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention. In addition, the fifth preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the fifth preset value in actual applications, as long as it is determined by the fifth preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate大于或等于第五预设值且小于或等于第六预设值并且室外机的当前运行模式为制冷模式，则维持空调系统的控制操作。仍以第五预设值为45％为例，其中，第六预设值可以设定为55％，即当Rate大于或等于45％且小于或等于55％时，室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad相差不多，多联机空调系统判断为制冷室内机的制冷效果和制热室内机的制热效果基本处于均衡状态，因此多联机空调系统不必进行任何控制操作，使多联机空调系统始终保持在该均衡状态。此外，第六预设值也不限于55％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第六 预设值的具体数值，只要通过第五预设值和第六预设值共同确定的分界区间能够判定制冷室内机的制冷效果和制热室内机的制热效果处于均衡状态即可。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is greater than Or equal to the fifth preset value and less than or equal to the sixth preset value and the current operation mode of the outdoor unit is a cooling mode, the control operation of the air conditioning system is maintained. Still taking the fifth preset value of 45% as an example, wherein the sixth preset value can be set to 55%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times. In addition, the sixth preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the sixth preset value in actual applications, as long as the fifth preset value and the first preset value are passed. The boundary interval determined by the six preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate大于第六预设值并且室外机的当前运行模式为制冷模式，则继续获取电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。具体而言，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速；如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制热模式，增大电子膨胀阀的开度并提高室外机的风机转速。仍以第六预设值为55％为例，即当Rate大于55％时，室内机的制热总负荷HeatLoad高于制冷总负荷CoolLoad较多，多联机空调系统判断为制热室内机的制热效果不如制冷室内机的制冷效果，由于此时室外机处于制冷模式，因此优先采用减小室外机的电子膨胀阀的开度，并降低室外机的风机转速的方式来使室外机换热器的散热降低，从而改善制热室内机的制热效果，在实际应用中，室外机的电子膨胀阀的开度优选为每次减小5％(全闭为0％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地降低，即在每次减小室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然大于55％，则再一次减小室外机的电子膨胀阀开度并降低室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于减小5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次减小的百分比数值各不相同，甚至在极端情况下可以直接一次减小至0％(即室外机的电子膨胀阀全闭)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次减小的开度，这种每次电子膨胀阀开度减小的具体百分比数值的调整或改变不构成对本发明的限制。在室外机的电子膨胀阀的开度减小至0％，即室外机的电子膨胀阀完全关闭(由于室外机的风机随着室外机的电子膨胀阀的 开度比率进行转速调整，在室外机的电子膨胀阀完全关闭时，原则上室外机的风机处于停转状态)后，如果Rate还是大于55％，则此时无法再通过减小电子膨胀阀开度并降低室外机的风机转速的方式来提高制热室内机的制热效果，这时候需要将室外机由制冷模式切换至制热模式，然后增大室外机的电子膨胀阀的开度并提高室外机的风机转速的方式来提高制热室内机的制热效果。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is greater than The sixth preset value and the current operation mode of the outdoor unit is the cooling mode, then the current status of the electronic expansion valve and the fan of the outdoor unit is continuously acquired; and the air conditioning system is selectively adjusted according to the current status of the electronic expansion valve and the fan of the outdoor unit Control operations. Specifically, the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Then reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the heating mode, increasing The opening degree of the electronic expansion valve increases the fan speed of the outdoor unit. Still taking the sixth preset value of 55% as an example, that is, when the Rate is greater than 55%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air conditioning system determines that the heating indoor unit is a heating system. The thermal effect is not as good as the cooling effect of the indoor unit. Because the outdoor unit is in the cooling mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat radiation of the outdoor unit is reduced, thereby improving the heating effect of the indoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%), and the fan speed of the outdoor unit is reduced. With the opening ratio of the electronic expansion valve of the outdoor unit correspondingly reduced, that is, after reducing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate, if Rate If it is still greater than 55%, reduce the opening degree of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit again. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention. The opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still greater than 55%, the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time. To improve the heating effect of the heating indoor unit, you need to switch the outdoor unit from the cooling mode to the heating mode, and then increase the opening of the electronic expansion valve of the outdoor unit and increase the fan speed of the outdoor unit to improve the heating. Heating effect of thermal indoor unit.
“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate小于第七预设值并且室外机的当前运行模式为制热模式，则继续获取室外机的电子膨胀阀和室外机的风机的当前状态；根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作。具体而言，“根据电子膨胀阀和室外机的风机的当前状态，选择性地调整空调系统的控制操作”的步骤具体包括：如果电子膨胀阀未完全关闭并且室外机的风机处于非停转状态，则减小电子膨胀阀的开度，并降低室外机的风机转速；如果电子膨胀阀完全关闭并且室外机的风机处于停转状态，则将室外机的运行模式切换为制冷模式，增大电子膨胀阀的开度并提高室外机的风机转速。以第七预设值为45％为例，即当Rate小于45％时，室内机的制冷总负荷CoolLoad高于制热总负荷HeatLoad较多，多联机空调系统判断为制冷室内机的制冷效果不如制热室内机的制热效果，由于此时室外机处于制热模式，因此优先采用减小室外机的电子膨胀阀的开度，并降低室外机的风机转速的方式来使室外机换热器的吸热降低，从而改善制冷室内机的制冷效果，在实际应用中，室外机的电子膨胀阀的开度优选为每次减小5％(全闭为0％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地降低，即在每次减小室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然小于45％，则再一次减小室外机的电子膨胀阀开度并降低室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于减小5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次减小的百分比数值各不相同，甚至在极端情况下可以直接一次减小至0％(即室外机的电子膨胀阀全闭)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次减小的开度，这种每次电 子膨胀阀开度减小的具体百分比数值的调整或改变不构成对本发明的限制。在室外机的电子膨胀阀的开度减小至0％，即室外机的电子膨胀阀完全关闭(由于室外机的风机随着室外机的电子膨胀阀的开度比率进行转速调整，在室外机的电子膨胀阀完全关闭时，原则上室外机的风机处于停转状态)后，如果Rate还是小于45％，则此时无法再通过减小电子膨胀阀开度并降低室外机的风机转速的方式来提高制冷室内机的制冷效果，这时候需要将室外机由制热模式切换至制冷模式，然后增大室外机的电子膨胀阀的开度并提高室外机的风机转速的方式来提高制冷室内机的制冷效果。此外，第七预设值也不限于45％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第七预设值的具体数值，只要通过第三预设值确定的分界点能够判定制冷室内机的制冷效果不如制热室内机的制热效果即可。The step of “selectively adjusting the control operation of the air conditioning system according to the cooling and heating effect load balancing index and the current operating mode of the outdoor unit” specifically includes: if the cooling and heating effect load balancing index Rate is less than a seventh preset value and the outdoor unit The current operation mode of the heating unit is to continue to obtain the current state of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit; and to selectively adjust the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit. Specifically, the step of “selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit” specifically includes: if the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state , Reduce the opening of the electronic expansion valve and reduce the fan speed of the outdoor unit; if the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operating mode of the outdoor unit is switched to the cooling mode, increasing the electronic The opening of the expansion valve increases the fan speed of the outdoor unit. Take the seventh preset value of 45% as an example, that is, when Rate is less than 45%, the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad, and the multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good. Since the outdoor unit is in heating mode at this time, it is preferred to reduce the opening of the electronic expansion valve of the outdoor unit and reduce the fan speed of the outdoor unit to make the outdoor unit heat exchanger. The heat absorption of the outdoor unit is reduced, thereby improving the cooling effect of the indoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably reduced by 5% each time (fully closed is 0%). The opening ratio of the electronic expansion valve of the outdoor unit is correspondingly reduced. That is, after reducing the opening of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If it is less than 45%, the opening degree of the electronic expansion valve of the outdoor unit is reduced again and the fan speed of the outdoor unit is reduced. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to being reduced by 5% each time, and may be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly reduced to 0% at a time (that is, the electronic expansion valve of the outdoor unit is fully closed). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve decreases does not constitute a limitation on the present invention. The opening degree of the electronic expansion valve of the outdoor unit is reduced to 0%, that is, the electronic expansion valve of the outdoor unit is completely closed (because the fan of the outdoor unit adjusts the rotation speed with the opening ratio of the electronic expansion valve of the outdoor unit, When the electronic expansion valve is completely closed, in principle, the fan of the outdoor unit is in a stopped state), if the Rate is still less than 45%, then the opening of the electronic expansion valve and the speed of the fan of the outdoor unit cannot be reduced at this time. To improve the cooling effect of the cooling indoor unit, the outdoor unit needs to be switched from the heating mode to the cooling mode, and then the opening degree of the electronic expansion valve of the outdoor unit and the fan speed of the outdoor unit are increased to increase the cooling indoor unit. Cooling effect. In addition, the seventh preset value is not limited to 45%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the seventh preset value in actual applications, as long as it is determined by the third preset value. The demarcation point can determine that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate大于或等于第七预设值且小于或等于第八预设值并且室外机的当前运行模式为制热模式，则维持空调系统的控制操作。仍以第七预设值为45％为例，其中，第八预设值可以设定为55％，即当Rate大于或等于45％且小于或等于55％时，室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad相差不多，多联机空调系统判断为制冷室内机的制冷效果和制热室内机的制热效果基本处于均衡状态，因此多联机空调系统不必进行任何控制操作，使多联机空调系统始终保持在该均衡状态。此外，第八预设值也不限于55％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第八预设值的具体数值，只要通过第七预设值和第八预设值共同确定的分界区间能够判定制冷室内机的制冷效果和制热室内机的制热效果处于均衡状态即可。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is greater than Or equal to the seventh preset value and less than or equal to the eighth preset value and the current operation mode of the outdoor unit is a heating mode, the control operation of the air conditioning system is maintained. Taking the seventh preset value as 45% as an example, the eighth preset value can be set to 55%, that is, when Rate is greater than or equal to 45% and less than or equal to 55%, the total cooling load of the indoor unit CoolLoad Similar to the total heating load HeatLoad, the multi-line air conditioning system judges that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are basically in a balanced state, so the multi-line air conditioning system does not need to perform any control operation, so that the multi-line air conditioning The system remains in this equilibrium state at all times. In addition, the eighth preset value is not limited to 55%, and may also be other percentage values. Those skilled in the art can flexibly set specific values of the eighth preset value in actual applications, as long as the seventh preset value and the first preset value are passed. The boundary interval determined by the eight preset values can determine that the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit are in an equilibrium state.
在上述技术方案的基础上，“根据制冷制热效果负荷均衡指数和室外机的当前运行模式，选择性地调整空调系统的控制操作”的步骤还包括：如果制冷制热效果负荷均衡指数Rate大于第八预设值并且室外机的当前运行模式为制热模式，则增大室外机的电子膨胀阀的开度，并提高室外机的风机转速。仍以第八预设值为55％为例，即当Rate大于 55％时，室内机的制热总负荷HeatLoad高于制冷总负荷CoolLoad较多，多联机空调系统判断为制热室内机的制热效果不如制冷室内机的制冷效果，此时应增大室外机的电子膨胀阀的开度，并提高室外机的风机转速，从而利用室外机换热器的吸热来提高制热室内机的制热效果。其中，室外机的风机转速应该参照室外机的电子膨胀阀开度比率进行调整。在实际应用中，室外机的电子膨胀阀的开度优选为每次增大5％(全开为100％)，室外机的风机转速随着室外机的电子膨胀阀的开度比率相应地提高，即在每次增大室外机的电子膨胀阀的开度后，多联机空调系统继续获取制冷制热效果负荷均衡指数Rate，如果Rate仍然大于55％，则再一次增大室外机的电子膨胀阀开度并提高室外机的风机转速。当然，室外机的电子膨胀阀的开度每次不限于增大5％，还可以为10％、15％等，或者室外机的电子膨胀阀的开度每次增大的百分比数值各不相同，甚至在极端情况下可以直接一次增大至100％(即室外机的电子膨胀阀全开)，本领域技术人员可以在实际应用中灵活地设置电子膨胀阀每次增大的开度，这种每次电子膨胀阀开度增大的具体百分比数值的调整或改变不构成对本发明的限制。Based on the above technical solution, the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balancing index and the current operation mode of the outdoor unit" further includes: if the cooling and heating effect load balancing index Rate is greater than An eighth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit, and increase the fan speed of the outdoor unit. Still taking the eighth preset value of 55% as an example, that is, when Rate is greater than 55%, the total heating load HeatLoad of the indoor unit is higher than the total cooling load CoolLoad, and the multi-line air-conditioning system determines that the heating indoor unit is manufactured. The thermal effect is not as good as the cooling indoor unit. At this time, the opening of the electronic expansion valve of the outdoor unit should be increased, and the fan speed of the outdoor unit should be increased. Therefore, the heat absorption of the outdoor unit's heat exchanger can be used to improve the heating of the indoor unit. Heating effect. Among them, the fan speed of the outdoor unit should be adjusted with reference to the opening ratio of the electronic expansion valve of the outdoor unit. In practical applications, the opening degree of the electronic expansion valve of the outdoor unit is preferably increased by 5% each time (full opening is 100%). The fan speed of the outdoor unit increases correspondingly with the opening ratio of the electronic expansion valve of the outdoor unit. That is, after increasing the opening degree of the electronic expansion valve of the outdoor unit each time, the multi-line air conditioning system continues to obtain the cooling and heating effect load balance index Rate. If the Rate is still greater than 55%, the electronic expansion of the outdoor unit is increased again. Valve opening and increase fan speed of outdoor unit. Of course, the opening degree of the electronic expansion valve of the outdoor unit is not limited to an increase of 5% each time, but may also be 10%, 15%, etc., or the percentage value of the opening degree of the electronic expansion valve of the outdoor unit is different each time. Even in extreme cases, it can be directly increased to 100% at one time (that is, the electronic expansion valve of the outdoor unit is fully open). Those skilled in the art can flexibly set the opening degree of the electronic expansion valve each time in practical applications. The adjustment or change of the specific percentage value of each time the opening degree of the electronic expansion valve increases does not constitute a limitation on the present invention.
优选地，在室外机开启之前，本发明的控制方法还包括：获取所有室内机的制冷总负荷和制热总负荷；根据制冷总负荷和制热总负荷，选择室外机的开启模式。其中，仍然可以通过计算前述的制冷制热效果负荷均衡指数来进行室外机开启模式的判断，此外，还可以通过直接将制冷总负荷和制热总负荷比较的方式来进行室外机开启模式的判断。下面通过三个实施例进一步地阐述本发明的技术方案。Preferably, before the outdoor unit is turned on, the control method of the present invention further includes: obtaining a total cooling load and a total heating load of all the indoor units; and selecting an on mode of the outdoor unit according to the total cooling load and the total heating load. Among them, it is still possible to determine the outdoor unit on mode by calculating the aforementioned cooling and heating effect load balance index. In addition, the outdoor unit on mode can also be determined by directly comparing the total cooling load and the total heating load. . The technical solution of the present invention is further explained by using three embodiments below.
实施例三Example three
“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤包括：计算制冷总负荷CoolLoad与制热总负荷HeatLoad的和值；计算制冷总负荷CoolLoad与和值的比值来获取制冷制热效果负荷均衡指数Rate(该计算方式与实施例一相同，在此就不再赘述)；根据制冷制热效果负荷均衡指数Rate，选择室外机的开启模式。具体而言，“根据制冷制热效果负荷均衡指数Rate，选择室外机的开启模式”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate大于或等于第九预设值，则室外机以制冷模式开启；如果制冷制热效果负荷均衡指数Rate小于第九 预设值，则室外机以制热模式开启。其中，第九预设值可以为50％，即当Rate大于50％时，室内机的制冷总负荷CoolLoad大于制热总负荷HeatLoad，说明制冷室内机的制冷效果不如制热室内机的制热效果，此时室外机应该以制冷模式开启，从而提高制冷室内机的制冷效果；而当Rate小于50％时，室内机的制冷总负荷CoolLoad小于制热总负荷HeatLoad，说明制热室内机的制热效果不如制冷室内机的制冷效果，此时室外机应该以制热模式开启，从而提高制热室内机的制热效果。此外，第九预设值不限于50％，还可以为其他百分比数值，本领域技术人员可以在实际应用中灵活地设置第九预设值的具体数值，只要通过第九预设值确定的分界点能够判定并比较制冷室内机的制冷效果和制热室内机的制热效果即可。需要说明的是，当Rate等于50％时，这时候室内机的制冷总负荷CoolLoad等于制热总负荷HeatLoad，原则上室外机既可以按照制冷模式开启，也可以按照制热模式开启，在该实施例中，室外机以制冷模式开启。The steps of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" include: calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating the ratio of the total cooling load CoolLoad and the total value to obtain cooling The heating effect load balance index Rate (the calculation method is the same as that of the first embodiment, which will not be repeated here); according to the cooling and heating effect load balance index Rate, an on mode of the outdoor unit is selected. Specifically, the step of “selecting the opening mode of the outdoor unit according to the cooling and heating effect load balancing index Rate” specifically includes: if the cooling and heating effect load balancing index Rate is greater than or equal to a ninth preset value, the outdoor unit uses cooling The mode is turned on; if the cooling and heating effect load balance index Rate is less than the ninth preset value, the outdoor unit is turned on in the heating mode. The ninth preset value may be 50%, that is, when Rate is greater than 50%, the total cooling load of the indoor unit CoolLoad is greater than the total heating load HeatLoad, indicating that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit. At this time, the outdoor unit should be turned on in the cooling mode to improve the cooling effect of the indoor unit. When the rate is less than 50%, the total cooling load of the indoor unit CoolLoad is less than the total heating load HeatLoad, indicating the heating of the indoor unit. The effect is not as good as the cooling effect of the cooling indoor unit. At this time, the outdoor unit should be turned on in the heating mode, thereby improving the heating effect of the heating indoor unit. In addition, the ninth preset value is not limited to 50%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the ninth preset value in actual applications, as long as the boundary determined by the ninth preset value is used. It is sufficient to determine and compare the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit. It should be noted that when Rate is equal to 50%, then the total cooling load of the indoor unit CoolLoad is equal to the total heating load HeatLoad. In principle, the outdoor unit can be turned on in either the cooling mode or the heating mode. In this implementation, In the example, the outdoor unit is turned on in the cooling mode.
实施例四 Embodiment 4
“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤包括：计算制冷总负荷CoolLoad与制热总负荷HeatLoad的和值；计算制热总负荷HeatLoad与和值的比值来获取制冷制热效果负荷均衡指数Rate(该计算方式与实施例二相同，在此就不再赘述)；根据制冷制热效果负荷均衡指数Rate，选择室外机的开启模式。具体而言，“根据制冷制热效果负荷均衡指数Rate，选择室外机的开启模式”的步骤具体包括：如果制冷制热效果负荷均衡指数Rate大于或等于第十预设值，则室外机以制热模式开启；如果制冷制热效果负荷均衡指数Rate小于第十预设值，则室外机以制冷模式开启。其中，第十预设值可以为50％，即当Rate大于50％时，室内机的制热总负荷HeatLoad大于制冷总负荷CoolLoad，说明制热室内机的制热效果不如制冷室内机的制冷效果，此时室外机应该以制热模式开启，从而提高制热室内机的制热效果；而当Rate小于50％时，室内机的制热总负荷HeatLoad小于制冷总负荷CoolLoad，说明制冷室内机的制冷效果不如制热室内机的制热效果，此时室外机应该以制冷模式开启，从而提高制冷室内机的制冷效果。此外，第十预设值不限于50％，还可以为其他百分比数值，本领域技术人员可以在实际 应用中灵活地设置第十预设值的具体数值，只要通过第十预设值确定的分界点能够判定并比较制冷室内机的制冷效果和制热室内机的制热效果即可。需要说明的是，当Rate等于50％时，这时候室内机的制冷总负荷CoolLoad等于制热总负荷HeatLoad，原则上室外机既可以按照制冷模式开启，也可以按照制热模式开启，在该实施例中，室外机以制热模式开启。The steps of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" include: calculating the sum of the total cooling load CoolLoad and the total heating load HeatLoad; calculating the ratio of the total heating load HeatLoad to the total value to obtain The cooling and heating effect load balancing index Rate (the calculation method is the same as that in the second embodiment, which will not be repeated here); according to the cooling and heating effect load balancing index Rate, an on mode of the outdoor unit is selected. Specifically, the step of “selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index Rate” specifically includes: if the cooling and heating effect load balancing index Rate is greater than or equal to the tenth preset value, The thermal mode is turned on; if the cooling and heating effect load balance index Rate is less than the tenth preset value, the outdoor unit is turned on in the cooling mode. The tenth preset value may be 50%, that is, when Rate is greater than 50%, the total heating load of the indoor unit, HeatLoad, is greater than the total cooling load, CoolLoad, indicating that the heating effect of the heating indoor unit is not as good as that of the cooling indoor unit. At this time, the outdoor unit should be turned on in the heating mode, so as to improve the heating effect of the heating indoor unit; and when Rate is less than 50%, the total heating load HeatLoad of the indoor unit is less than the total cooling load CoolLoad, indicating that the The cooling effect is not as good as the heating effect of a heating indoor unit. At this time, the outdoor unit should be turned on in a cooling mode to improve the cooling effect of the cooling indoor unit. In addition, the tenth preset value is not limited to 50%, and may also be other percentage values. Those skilled in the art can flexibly set the specific value of the tenth preset value in actual applications, as long as the boundary determined by the tenth preset value is determined. It is sufficient to determine and compare the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit. It should be noted that when Rate is equal to 50%, then the total cooling load of the indoor unit CoolLoad is equal to the total heating load HeatLoad. In principle, the outdoor unit can be turned on in either the cooling mode or the heating mode. In this implementation, In the example, the outdoor unit is turned on in a heating mode.
实施例五Example 5
“根据制冷总负荷和制热总负荷，选择室外机的开启模式”的步骤具体包括：如果制冷总负荷大于或等于制热总负荷，则室外机以制冷模式开启；如果制冷总负荷小于制热总负荷，则室外机以制热模式开启。通过将室内机的制热总负荷和制冷总负荷直接比较，可以直接比较制冷室内机的制冷效果和制热室内机的制热效果，从而直接选择相应的开启模式即可。The step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" specifically includes: if the total cooling load is greater than or equal to the total heating load, the outdoor unit is turned on in the cooling mode; if the total cooling load is less than the heating Total load, the outdoor unit is turned on in heating mode. By directly comparing the total heating load and the total cooling load of the indoor unit, the cooling effect of the cooling indoor unit and the heating effect of the heating indoor unit can be directly compared, and the corresponding opening mode can be directly selected.
下面结合一个具体的实施例来阐述上述的技术方案。The above technical solution is described below in combination with a specific embodiment.
实施例六Example Six
如图2和3所示，室外机通过阀盒1与所有制冷的室内机连接，室外机通过阀盒2与所有制热的室内机连接，需要说明的是，阀盒1和阀盒2的模式可以不同，但是同一个阀盒连接的室内机模式必须相同，继续参见图2和3，假定2#室内机和8#室内机处于关机状态，1#室内机、3#室内机和4#室内机处于制冷模式，5#室内机、6#室内机和7#室内机处于制热状态，室内机的参数详见图3，在室外机开启之前(以实施例三中的情况为例)，先计算室内机的制冷总负荷CoolLoad和制热总负荷HeatLoad，本实施例中制冷制热效果负荷均衡指数Rate的计算方式为Rate＝CoolLoad/(CoolLoad+HeatLoad))，其中，制冷总负荷CoolLoad＝∑[(CurTemp-SetTemp)×HP]＝(23.2-20)×5.0+(26.7-22)×1.2+(25.3-23)×0.6＝23.02，制热总负荷HeatLoad＝∑[(SetTemp-CurTemp)×HP]＝(30-26.5)×4.0+(25-24.2)×1.5+(24-23.5)×2.0＝16.2，因此，Rate＝23.02/(23.02+16.2)＝0.587＝58.7％，仍以第九预设值为50％为例，由于Rate大于50％，此时室内机应该以制冷模式开启。As shown in Figures 2 and 3, the outdoor unit is connected to all cooling indoor units through valve box 1, and the outdoor unit is connected to all heating indoor units through valve box 2. It should be noted that the mode of valve box 1 and valve box 2 It can be different, but the indoor unit mode connected to the same valve box must be the same. Continue to refer to Figures 2 and 3, assuming that 2 # indoor unit and 8 # indoor unit are off, 1 # indoor unit, 3 # indoor unit, and 4 # indoor The unit is in cooling mode, and the 5 # indoor unit, 6 # indoor unit, and 7 # indoor unit are in heating state. For the parameters of the indoor unit, see Figure 3. Before the outdoor unit is turned on (take the case in the third embodiment as an example), First calculate the total cooling load CoolLoad and total heating load HeatLoad of the indoor unit. In this embodiment, the calculation method of the cooling and heating effect load balance index Rate is Rate = CoolLoad / (CoolLoad + HeatLoad)), where the total cooling load CoolLoad = ∑ [(CurTemp-SetTemp) × HP] = (23.2-20) × 5.0 + (26.7-22) × 1.2 + (25.3-23) × 0.6 = 23.02, total heating load HeatLoad = ∑ [(SetTemp-CurTemp) × HP] = (30-26.5) × 4.0 + (25-24.2) × 1.5 + (24-23.5) × 2.0 = 16.2, therefore, Rate = 23.02 / (23.02 + 16.2) = 0.58 7 = 58.7%, still taking the ninth preset value as 50% as an example. Since the Rate is greater than 50%, the indoor unit should be turned on in the cooling mode at this time.
又比如，如果上述的计算结果为室外机开启之后，并且此时室外机的运行模式为制冷模式(即实施例一中的情况)，仍以第一预设 值为55％为例，由于此时Rate大于55％，说明室内机的制冷总负荷CoolLoad高于制热总负荷HeatLoad较多，多联机空调系统判断为制冷室内机的制冷效果不如制热室内机的制热效果，此时应增大室外机的电子膨胀阀的开度，并提高室外机的风机转速，从而利用室外机换热器的散热来提高制冷室内机的制冷效果。For another example, if the above calculation result is that the outdoor unit is turned on and the operating mode of the outdoor unit is the cooling mode (that is, the case in the first embodiment), the first preset value is still 55% as an example. When Rate is greater than 55%, it means that the total cooling load of the indoor unit CoolLoad is higher than the total heating load HeatLoad. The multi-line air conditioning system determines that the cooling effect of the cooling indoor unit is not as good as the heating effect of the heating indoor unit. The opening degree of the electronic expansion valve of the large outdoor unit and the fan speed of the outdoor unit are increased, so that the heat dissipation of the outdoor unit heat exchanger is used to improve the cooling effect of the cooling indoor unit.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical solutions after these changes or replacements will fall into the protection scope of the present invention.

Claims (32)

  1. 一种用于多联机空调系统的控制方法，所述多联机空调系统包括室外机和与所述室外机相连的多个室内机，其特征在于，所述控制方法包括：A control method for a multi-connected air-conditioning system. The multi-connected air-conditioning system includes an outdoor unit and a plurality of indoor units connected to the outdoor unit. The control method includes:
    获取所述空调系统的制冷制热效果负荷均衡指数和所述室外机的当前运行模式；Obtaining a cooling and heating effect load balancing index of the air conditioning system and a current operating mode of the outdoor unit;
    根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作。The control operation of the air conditioning system is selectively adjusted according to the cooling and heating effect load balance index and the current operation mode of the outdoor unit.
  2. 根据权利要求1所述的控制方法，其特征在于，“获取所述空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：The control method according to claim 1, wherein the step of "obtaining a cooling and heating effect load balance index of the air conditioning system" specifically includes:
    获取所有所述室内机的制冷总负荷和制热总负荷；Obtaining the total cooling load and the total heating load of all the indoor units;
    计算所述制冷总负荷与所述制热总负荷的和值；Calculating a sum of the total cooling load and the total heating load;
    计算所述制冷总负荷与所述和值的比值来获取所述制冷制热效果负荷均衡指数。Calculate the ratio of the total cooling load to the sum to obtain the cooling and heating effect load balance index.
  3. 根据权利要求2所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 2, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" is specific include:
    如果所述制冷制热效果负荷均衡指数大于第一预设值并且所述室外机的当前运行模式为制冷模式，则增大所述室外机的电子膨胀阀的开度，并提高所述室外机的风机转速。If the cooling and heating effect load balance index is greater than a first preset value and the current operation mode of the outdoor unit is a cooling mode, increase the opening degree of the electronic expansion valve of the outdoor unit and increase the outdoor unit Fan speed.
  4. 根据权利要求3所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 3, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further comprises include:
    如果所述制冷制热效果负荷均衡指数小于或等于所述第一预设值且大于或等于第二预设值并且所述室外机的当前运行模式为制冷模式，则维持所述空调系统的控制操作。If the cooling and heating effect load balance index is less than or equal to the first preset value and greater than or equal to the second preset value and the current operation mode of the outdoor unit is a cooling mode, control of the air conditioning system is maintained operating.
  5. 根据权利要求4所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 4, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further include:
    如果所述制冷制热效果负荷均衡指数小于所述第二预设值并且所述室外机的当前运行模式为制冷模式，则继续获取所述电子膨胀阀和所述室外机的风机的当前状态；If the load balance index of the cooling and heating effect is smaller than the second preset value and the current operation mode of the outdoor unit is a cooling mode, then continue to obtain the current states of the electronic expansion valve and the fan of the outdoor unit;
    根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作。According to the current state of the electronic expansion valve and the fan of the outdoor unit, the control operation of the air conditioning system is selectively adjusted.
  6. 根据权利要求5所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 5, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes:
    如果所述电子膨胀阀未完全关闭并且所述室外机的风机处于非停转状态，则减小所述电子膨胀阀的开度，并降低所述室外机的风机转速。If the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the speed of the fan of the outdoor unit is reduced.
  7. 根据权利要求6所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 6, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further comprises:
    如果所述电子膨胀阀完全关闭并且所述室外机的风机处于停转状态，则将所述室外机的运行模式切换为制热模式，增大所述电子膨胀阀的开度并提高所述室外机的风机转速。If the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operation mode of the outdoor unit is switched to a heating mode, the opening degree of the electronic expansion valve is increased, and the outdoor temperature is increased. The fan speed of the machine.
  8. 根据权利要求2所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 2, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" is specific include:
    如果所述制冷制热效果负荷均衡指数大于第三预设值并且所述室外机的当前运行模式为制热模式，则继续获取所述室外机的电子膨胀阀和所述室外机的风机的当前状态；If the load-balancing index of the cooling and heating effect is greater than a third preset value and the current operation mode of the outdoor unit is a heating mode, then continue to obtain the current of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit status;
    根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作。According to the current state of the electronic expansion valve and the fan of the outdoor unit, the control operation of the air conditioning system is selectively adjusted.
  9. 根据权利要求8所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 8, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes:
    如果所述电子膨胀阀未完全关闭并且所述室外机的风机处于非停转状态，则减小所述电子膨胀阀的开度，并降低所述室外机的风机转速。If the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the speed of the fan of the outdoor unit is reduced.
  10. 根据权利要求9所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 9, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further comprises:
    如果所述电子膨胀阀完全关闭并且所述室外机的风机处于停转状态，则将所述室外机的运行模式切换为制冷模式，增大所述电子膨胀阀的开度并提高所述室外机的风机转速。If the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operation mode of the outdoor unit is switched to a cooling mode, the opening degree of the electronic expansion valve is increased, and the outdoor unit is increased. Fan speed.
  11. 根据权利要求8所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 8, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further include:
    如果所述制冷制热效果负荷均衡指数小于或等于所述第三预设值且大于或等于第四预设值并且所述室外机的当前运行模式为制热模式，则维持所述空调系统的控制操作。If the cooling and heating effect load balance index is less than or equal to the third preset value and greater than or equal to the fourth preset value and the current operation mode of the outdoor unit is a heating mode, maintaining the Control operation.
  12. 根据权利要求11所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 11, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further comprises include:
    如果所述制冷制热效果负荷均衡指数小于所述第四预设值并且所述室外机的当前运行模式为制热模式，则增大所述室外机的电子膨胀阀的开度，并提高所述室外机的风机转速。If the cooling and heating effect load balance index is less than the fourth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit and increase the The fan speed of the outdoor unit is described.
  13. 根据权利要求1所述的控制方法，其特征在于，“获取所述空调系统的制冷制热效果负荷均衡指数”的步骤具体包括：The control method according to claim 1, wherein the step of "obtaining a cooling and heating effect load balance index of the air conditioning system" specifically includes:
    获取所有所述室内机的制冷总负荷和制热总负荷；Obtaining the total cooling load and the total heating load of all the indoor units;
    计算所述制冷总负荷与所述制热总负荷的和值；Calculating a sum of the total cooling load and the total heating load;
    计算所述制热总负荷与所述和值的比值来获取所述制冷制热效果负荷均衡指数。Calculate a ratio of the total heating load to the sum to obtain the cooling and heating effect load balance index.
  14. 根据权利要求13所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 13, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" is specific include:
    如果所述制冷制热效果负荷均衡指数小于第五预设值并且所述室外机的当前运行模式为制冷模式，则增大所述室外机的电子膨胀阀的开度，并提高所述室外机的风机转速。If the cooling and heating effect load balance index is less than a fifth preset value and the current operation mode of the outdoor unit is a cooling mode, increase the opening degree of the electronic expansion valve of the outdoor unit and increase the outdoor unit Fan speed.
  15. 根据权利要求14所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 14, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further comprises include:
    如果所述制冷制热效果负荷均衡指数大于或等于所述第五预设值且小于或等于第六预设值并且所述室外机的当前运行模式为制冷模式，则维持所述空调系统的控制操作。If the cooling and heating effect load balance index is greater than or equal to the fifth preset value and less than or equal to the sixth preset value and the current operation mode of the outdoor unit is a cooling mode, control of the air conditioning system is maintained operating.
  16. 根据权利要求15所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 15, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further comprises include:
    如果所述制冷制热效果负荷均衡指数大于所述第六预设值并且所述室外机的当前运行模式为制冷模式，则继续获取所述电子膨胀阀和所述室外机的风机的当前状态；If the cooling and heating effect load balance index is greater than the sixth preset value and the current operating mode of the outdoor unit is a cooling mode, then continue to obtain the current states of the electronic expansion valve and the fan of the outdoor unit;
    根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作。According to the current state of the electronic expansion valve and the fan of the outdoor unit, the control operation of the air conditioning system is selectively adjusted.
  17. 根据权利要求16所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 16, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes:
    如果所述电子膨胀阀未完全关闭并且所述室外机的风机处于非停转状态，则减小所述电子膨胀阀的开度，并降低所述室外机的风机转速。If the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the speed of the fan of the outdoor unit is reduced.
  18. 根据权利要求17所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 17, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further comprises:
    如果所述电子膨胀阀完全关闭并且所述室外机的风机处于停转状态，则将所述室外机的运行模式切换为制热模式，增大所述电子膨胀阀的开度并提高所述室外机的风机转速。If the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operation mode of the outdoor unit is switched to a heating mode, the opening degree of the electronic expansion valve is increased, and the outdoor temperature is increased. The fan speed of the machine.
  19. 根据权利要求13所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 13, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" is specific include:
    如果所述制冷制热效果负荷均衡指数小于第七预设值并且所述室外机的当前运行模式为制热模式，则继续获取所述室外机的电子膨胀阀和所述室外机的风机的当前状态；If the cooling and heating effect load balance index is less than a seventh preset value and the current operation mode of the outdoor unit is a heating mode, then continue to obtain the current of the electronic expansion valve of the outdoor unit and the fan of the outdoor unit. status;
    根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作。According to the current state of the electronic expansion valve and the fan of the outdoor unit, the control operation of the air conditioning system is selectively adjusted.
  20. 根据权利要求19所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤具体包括：The control method according to claim 19, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" specifically includes:
    如果所述电子膨胀阀未完全关闭并且所述室外机的风机处于非停转状态，则减小所述电子膨胀阀的开度，并降低所述室外机的风机转速。If the electronic expansion valve is not completely closed and the fan of the outdoor unit is in a non-stop state, the opening degree of the electronic expansion valve is reduced, and the speed of the fan of the outdoor unit is reduced.
  21. 根据权利要求20所述的控制方法，其特征在于，“根据所述电子膨胀阀和所述室外机的风机的当前状态，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 20, wherein the step of "selectively adjusting the control operation of the air conditioning system according to the current state of the electronic expansion valve and the fan of the outdoor unit" further comprises:
    如果所述电子膨胀阀完全关闭并且所述室外机的风机处于停转状态，则将所述室外机的运行模式切换为制冷模式，增大所述电子膨胀阀的开度并提高所述室外机的风机转速。If the electronic expansion valve is completely closed and the fan of the outdoor unit is stopped, the operation mode of the outdoor unit is switched to a cooling mode, the opening degree of the electronic expansion valve is increased, and the outdoor unit is increased. Fan speed.
  22. 根据权利要求19所述的控制方法，其特征在于，“根据所述制 冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 19, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further include:
    如果所述制冷制热效果负荷均衡指数大于或等于所述第七预设值且小于或等于第八预设值并且所述室外机的当前运行模式为制热模式，则维持所述空调系统的控制操作。If the cooling and heating effect load balance index is greater than or equal to the seventh preset value and less than or equal to the eighth preset value and the current operation mode of the outdoor unit is a heating mode, maintaining the Control operation.
  23. 根据权利要求22所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数和所述室外机的当前运行模式，选择性地调整所述空调系统的控制操作”的步骤还包括：The control method according to claim 22, wherein the step of "selectively adjusting the control operation of the air conditioning system based on the cooling and heating effect load balance index and the current operation mode of the outdoor unit" further include:
    如果所述制冷制热效果负荷均衡指数大于所述第八预设值并且所述室外机的当前运行模式为制热模式，则增大所述室外机的电子膨胀阀的开度，并提高所述室外机的风机转速。If the cooling and heating effect load balance index is greater than the eighth preset value and the current operation mode of the outdoor unit is a heating mode, increase the opening degree of the electronic expansion valve of the outdoor unit and increase the The fan speed of the outdoor unit is described.
  24. 根据权利要求1至23中任一项所述的控制方法，其特征在于，在所述室外机开启之前，所述控制方法还包括：The control method according to any one of claims 1 to 23, wherein before the outdoor unit is turned on, the control method further comprises:
    获取所有所述室内机的制冷总负荷和制热总负荷；Obtaining the total cooling load and the total heating load of all the indoor units;
    根据所述制冷总负荷和所述制热总负荷，选择所述室外机的开启模式。Selecting the on mode of the outdoor unit according to the total cooling load and the total heating load.
  25. 根据权利要求24所述的控制方法，其特征在于，“根据所述制冷总负荷和所述制热总负荷，选择所述室外机的开启模式”的步骤包括：The control method according to claim 24, wherein the step of "selecting the on mode of the outdoor unit based on the total cooling load and the total heating load" includes:
    计算所述制冷总负荷与所述制热总负荷的和值；Calculating a sum of the total cooling load and the total heating load;
    计算所述制冷总负荷与所述和值的比值来获取所述制冷制热效果负荷均衡指数；Calculating a ratio of the total cooling load to the sum to obtain the cooling and heating effect load balance index;
    根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式。Selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index.
  26. 根据权利要求25所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式”的步骤具体包括：The control method according to claim 25, wherein the step of "selecting the on mode of the outdoor unit based on the cooling and heating effect load balancing index" specifically includes:
    如果所述制冷制热效果负荷均衡指数大于或等于第九预设值，则 所述室外机以制冷模式开启。If the cooling and heating effect load balance index is greater than or equal to a ninth preset value, the outdoor unit is turned on in a cooling mode.
  27. 根据权利要求26所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式”的步骤还包括：The control method according to claim 26, wherein the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" further comprises:
    如果所述制冷制热效果负荷均衡指数小于所述第九预设值，则所述室外机以制热模式开启。If the cooling and heating effect load balance index is less than the ninth preset value, the outdoor unit is turned on in a heating mode.
  28. 根据权利要求24所述的控制方法，其特征在于，“根据所述制冷总负荷和所述制热总负荷，选择所述室外机的开启模式”的步骤包括：The control method according to claim 24, wherein the step of "selecting the on mode of the outdoor unit based on the total cooling load and the total heating load" includes:
    计算所述制冷总负荷与所述制热总负荷的和值；Calculating a sum of the total cooling load and the total heating load;
    计算所述制热总负荷与所述和值的比值来获取所述制冷制热效果负荷均衡指数；Calculating a ratio of the total heating load to the sum to obtain the cooling and heating effect load balance index;
    根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式。Selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index.
  29. 根据权利要求28所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式”的步骤具体包括：The control method according to claim 28, wherein the step of "selecting the on mode of the outdoor unit based on the cooling and heating effect load balancing index" specifically includes:
    如果所述制冷制热效果负荷均衡指数大于或等于第十预设值，则所述室外机以制热模式开启。If the load balancing index of the cooling and heating effect is greater than or equal to the tenth preset value, the outdoor unit is turned on in a heating mode.
  30. 根据权利要求29所述的控制方法，其特征在于，“根据所述制冷制热效果负荷均衡指数，选择所述室外机的开启模式”的步骤还包括：The control method according to claim 29, wherein the step of "selecting the on mode of the outdoor unit according to the cooling and heating effect load balancing index" further comprises:
    如果所述制冷制热效果负荷均衡指数小于所述第十预设值，则所述室外机以制冷模式开启。If the cooling and heating effect load balance index is less than the tenth preset value, the outdoor unit is turned on in a cooling mode.
  31. 根据权利要求24所述的控制方法，其特征在于，“根据所述制冷总负荷和所述制热总负荷，选择所述室外机的开启模式”的步骤具体包括：The control method according to claim 24, wherein the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" specifically includes:
    如果所述制冷总负荷大于或等于所述制热总负荷，则所述室外机以制冷模式开启。If the total cooling load is greater than or equal to the total heating load, the outdoor unit is turned on in a cooling mode.
  32. 根据权利要求31所述的控制方法，其特征在于，“根据所述制冷总负荷和所述制热总负荷，选择所述室外机的开启模式”的步骤还包括：The control method according to claim 31, wherein the step of "selecting the on mode of the outdoor unit according to the total cooling load and the total heating load" further comprises:
    如果所述制冷总负荷小于所述制热总负荷，则所述室外机以制热模式开启。If the total cooling load is less than the total heating load, the outdoor unit is turned on in a heating mode.
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