WO2020038006A1 - Procédé de commande de système de climatisation multi-bloc - Google Patents

Procédé de commande de système de climatisation multi-bloc 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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English (en)
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/fr

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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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  • Air Conditioning Control Device (AREA)

Abstract

La présente invention se situe dans le domaine technique des climatiseurs, et vise à résoudre le problème selon lequel un procédé de commande, destiné à un système de climatisation multi-bloc existant, ne peut pas résoudre les effets de réfrigération et de chauffage non équilibrés pendant le fonctionnement du système de climatisation multi-bloc. Par conséquent, la présente invention concerne un procédé de commande destiné à un système de climatisation multi-bloc. Le système de climatisation multi-bloc comprend une unité extérieure et une pluralité d'unités intérieures reliées à l'unité extérieure. Le procédé de commande consiste : à acquérir un indice d'équilibrage des charges des effets de réfrigération et de chauffage d'un système de climatisation et le mode de fonctionnement actuel de l'unité extérieure ; et à régler sélectivement une activation de commande du système de climatisation en fonction de l'indice d'équilibrage des charges des effets de réfrigération et de chauffage et du mode de fonctionnement actuel de l'unité extérieure. Le procédé selon la présente invention vise à garantir l'équilibrage des effets de toutes les unités intérieures de réfrigération et de toutes les unités intérieures de chauffage, et à équilibrer l'effet de chauffage de toutes les unités intérieures de chauffage, et l'effet de réfrigération de toutes les unités intérieures de réfrigération, conjointement à la réduction de la consommation d'énergie du système de climatisation autant que possible, ce qui permet au système de climatisation multi-bloc d'économiser plus d'énergie.
PCT/CN2019/083647 2018-08-20 2019-04-22 Procédé de commande de système de climatisation multi-bloc WO2020038006A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN109237704B (zh) * 2018-08-20 2021-09-21 青岛海尔空调电子有限公司 用于多联机空调系统的控制方法
CN112013474A (zh) * 2019-05-30 2020-12-01 广东美的制冷设备有限公司 空调器及其控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101650552A (zh) * 2008-08-14 2010-02-17 海尔集团公司 多联式变频空调能力预测控制系统和方法
CN107166647A (zh) * 2017-05-19 2017-09-15 青岛海尔空调电子有限公司 一种多联机控制方法及系统
CN107726567A (zh) * 2017-10-25 2018-02-23 广东美的暖通设备有限公司 新风机的控制方法及系统、新风机及多联机空调系统
JP2018054222A (ja) * 2016-09-29 2018-04-05 ダイキン工業株式会社 冷凍装置
CN109237704A (zh) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 用于多联机空调系统的控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62102046A (ja) * 1985-10-28 1987-05-12 Toshiba Corp 空気調和機
KR20060030761A (ko) * 2004-10-06 2006-04-11 삼성전자주식회사 다실형 공기조화 시스템 및 그 제어방법
CN104896621B (zh) * 2015-06-09 2017-08-29 广东美的暖通设备有限公司 多联机空调系统及多联机空调系统的控制方法
CN105674402B (zh) * 2016-03-23 2018-10-16 广东美的暖通设备有限公司 多联机系统及其模式切换控制方法
CN105757893B (zh) * 2016-03-23 2019-01-18 广东美的暖通设备有限公司 多联机系统及其室外换热器的换热控制方法
CN106642521A (zh) * 2016-09-21 2017-05-10 广东美的暖通设备有限公司 多联机空调系统的控制方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101650552A (zh) * 2008-08-14 2010-02-17 海尔集团公司 多联式变频空调能力预测控制系统和方法
JP2018054222A (ja) * 2016-09-29 2018-04-05 ダイキン工業株式会社 冷凍装置
CN107166647A (zh) * 2017-05-19 2017-09-15 青岛海尔空调电子有限公司 一种多联机控制方法及系统
CN107726567A (zh) * 2017-10-25 2018-02-23 广东美的暖通设备有限公司 新风机的控制方法及系统、新风机及多联机空调系统
CN109237704A (zh) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 用于多联机空调系统的控制方法

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