CN111425995A - Operation control method, multi-split heat pump air conditioning system and storage medium - Google Patents
Operation control method, multi-split heat pump air conditioning system and storage medium Download PDFInfo
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- CN111425995A CN111425995A CN202010261314.2A CN202010261314A CN111425995A CN 111425995 A CN111425995 A CN 111425995A CN 202010261314 A CN202010261314 A CN 202010261314A CN 111425995 A CN111425995 A CN 111425995A
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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
- F24F11/46—Improving electric energy efficiency or saving
- F24F11/47—Responding to energy costs
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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Abstract
The invention provides an operation control method, a multi-split heat pump air conditioning system and a storage medium, wherein the operation control method comprises the following steps: in response to an operation instruction of the indoor unit system, determining the required cooling power or heating power of the indoor unit system; determining at least one outdoor unit to be operated which is matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit; and configuring at least one outdoor unit to be operated to be in an operation state. Through the technical scheme of the invention, the outdoor unit can be in a high-efficiency operation state, and the requirement on indoor refrigeration or heating can be met, so that the energy-saving operation of the multi-split heat pump air conditioning system is realized.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to an operation control method, a multi-split heat pump air conditioning system and a computer readable storage medium.
Background
The multi-split heat pump air-conditioning system comprises an outer unit system and an inner unit system which are connected, the outer unit system comprises a plurality of outdoor units, in the operation process of the multi-split heat pump air-conditioning system, in the related technology, if one outdoor unit is detected to be incapable of meeting the use requirement, the outdoor unit system is switched to be started to work, and if the outdoor unit system cannot be matched with the capacity required by the indoor unit, the outer unit system is also operated in a low-output and low-efficiency section for a long time.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the present invention to provide an operation control method.
Another object of the present invention is to provide a multi-split heat pump air conditioning system.
It is another object of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided an operation control method including: in response to an operation instruction of the indoor unit system, determining the required cooling power or heating power of the indoor unit system; determining at least one outdoor unit to be operated which is matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit; and configuring at least one outdoor unit to be operated to be in an operation state.
In the technical scheme, the operation control method is suitable for a multi-split heat pump air-conditioning system, the multi-split heat pump air-conditioning system comprises an outer unit system and an inner unit system which are connected, the outer unit system comprises a plurality of outdoor units which are connected in parallel, and reference output power can be understood as output power corresponding to the optimal energy efficiency and/or the better energy efficiency of the outdoor units, so that at least one outdoor unit to be operated which can meet the refrigeration power or the heating power is determined according to the reference output power, one or more outdoor units which can meet the matching conditions in the plurality of outdoor units which are connected in parallel are controlled to operate, the outdoor units can be in an efficient operation state, the requirements for indoor refrigeration or heating can be met, and the energy-saving operation of the multi-split heat pump air-conditioning system.
Specifically, a plurality of outdoor units connected in parallel are connected with an indoor unit system through a set of pipelines, so that the refrigeration power or heating power required by the indoor unit system is provided by a single outdoor unit, or the refrigeration power or heating power required by the indoor unit system is determined after the output power of the outdoor units is accumulated, and the refrigeration capacities (or heating capacities) of different outdoor units are the same or different, so that at least one outdoor unit meeting the requirements of high-efficiency operation and indoor refrigeration capacity or heating capacity is determined by determining the matching relationship between the refrigeration power or heating power required by the indoor unit system and the output power of the outdoor unit in the optimal energy efficiency state and/or the optimal energy efficiency state, and the outdoor unit is controlled to operate, so that the energy conservation of the multi-split heat pump air conditioning system is realized.
In the above technical solution, determining at least one outdoor unit matched with the cooling power or the heating power according to the reference output power of the outdoor unit specifically includes: determining the reference output power of each outdoor unit according to the energy efficiency ratio curve; configuring various outdoor unit combinations according to a plurality of outdoor units connected in parallel, wherein the outdoor unit combinations comprise at least one outdoor unit; determining the reference output power of each outdoor unit combination according to the reference output power, and recording as the combined reference power; determining one combined reference power matched with the cooling power or the heating power in the plurality of combined reference powers, and recording the one combined reference power as matched output power; and determining the outdoor unit combination corresponding to the matched output power, and recording the outdoor unit combination as the matched outdoor unit combination so as to determine the matched outdoor unit combination as at least one outdoor unit to be operated, wherein the combined reference power corresponds to a power interval or a power value.
In this technical solution, each outdoor unit has an energy efficiency ratio curve, and different energy efficiency ratios corresponding to different output powers, so that the output power corresponding to the optimal energy efficiency and/or the more optimal energy efficiency through the energy efficiency ratio curve is the aforementioned reference output power.
The outdoor units can be configured with various outdoor unit combinations, and the configuration mode can be determined by a combination formula, namely:
c is the number of all combinations of m elements (wherein m is not less than 1 and not more than n) taken out of n different elements.
After determining a plurality of outdoor unit combinations, determining the reference output power of the outdoor unit combination by adopting a mode of accumulating the reference output power of the outdoor units in the combination for each outdoor unit combination, and recording the reference output power as the combined output power, wherein the combined output power comprises the output power of a single outdoor unit.
The combined output power can be a value or a numerical interval, and the matched combined output power is determined by comparing the combined output power with the required refrigeration power or heating power so as to further determine the matched outdoor unit combination, thereby realizing the efficient operation of the matched outdoor unit.
In order to improve the matching rate, the reference output power is represented by a power interval.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: configuring a plurality of reference power configuration intervals according to the plurality of combined reference powers; if the refrigerating power or the heating power belongs to any reference power configuration interval, recording the any reference power configuration interval as matching output power; and if the refrigerating power or the heating power does not belong to any reference power configuration interval, marking the reference power configuration interval which is greater than the refrigerating power or the heating power and is closest to the refrigerating power or the heating power as the matching output power.
As can be understood by those skilled in the art, if the required cooling power or heating power is greater than the reference output power of one outdoor unit and less than the sum of the reference output powers of two outdoor units, the two outdoor units are controlled to operate.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: and if the detected refrigerating power or heating power belongs to the power interval of any single outdoor unit combination, configuring the power interval into matched output power so as to configure any single outdoor unit combination into the outdoor unit to be operated.
In the technical scheme, the combination of the single outdoor units means that only one outdoor unit is arranged in the combination, if the required refrigerating power or heating power is small, namely when the single outdoor unit can meet the refrigerating or heating requirement, the refrigerating power or the heating power is detected to just belong to a certain combination of the single outdoor units, the refrigerating power or the heating power is indicated to be higher in matching with the combination of the single outdoor units, the combination of the single outdoor units is configured into the outdoor unit to be operated, the higher energy efficiency ratio can be obtained, and the operation energy saving is realized.
If the outdoor units have the same energy efficiency ratio curve, one outdoor unit can be selected to operate.
In any one of the above technical solutions, the method further includes: the multiple single outdoor unit combinations comprise a first single outdoor unit and a second single outdoor unit, the first single outdoor unit corresponds to a first power interval, the second single outdoor unit corresponds to a second power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the first power threshold and smaller than a lower limit threshold of the second power threshold, the second power interval is configured to be matched with the output power, so that the second single outdoor unit is configured to be an outdoor unit to be operated.
In the technical scheme, if the required refrigerating power or heating power is not detected to be just a combination of a certain single outdoor unit but between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: the multiple outdoor unit combinations comprise multiple outdoor unit combinations, if the fact that the refrigerating power or the heating power belongs to a power interval of any outdoor unit combination is detected, the power interval is configured to be matched with the output power, and any outdoor unit combination is configured to be an outdoor unit to be operated.
In the technical scheme, the combination of the single outdoor units means that only one outdoor unit is arranged in the combination, if the required refrigerating power or heating power is small, namely when the single outdoor unit can meet the refrigerating or heating requirement, the refrigerating power or the heating power is detected to just belong to a certain combination of the single outdoor units, the refrigerating power or the heating power is indicated to be higher in matching with the combination of the single outdoor units, the combination of the single outdoor units is configured into the outdoor unit to be operated, the higher energy efficiency ratio can be obtained, and the operation energy saving is realized.
And if the power interval with the combination of the multiple outdoor units meets the requirements of refrigeration or heating, one of the multiple outdoor units is selected to operate in a combined mode.
In any one of the above technical solutions, the method further includes: the multiple types of multi-outdoor unit combinations comprise a first outdoor unit combination and a second outdoor unit combination, the first outdoor unit combination corresponds to a third power interval, the second outdoor unit combination corresponds to a fourth power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the third power threshold and smaller than a lower limit threshold of the fourth power threshold, the fourth power interval is configured to be matched with output power, so that the second outdoor unit combination is configured to be an outdoor unit to be operated.
In the technical scheme, if the required refrigerating power or heating power is not detected to be just a combination of a certain single outdoor unit but between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any of the above technical solutions, the upper threshold is configured according to the maximum output power of the outdoor unit and a first coefficient, where the first coefficient is greater than or equal to 75% and less than or equal to 95%; the lower threshold is configured according to the maximum output power of the outdoor unit and a second coefficient, and the second coefficient is greater than or equal to 50% and less than or equal to 70%.
In any one of the above technical solutions, the method further includes: and if the change of the cooling power or the heating power is detected, reconfiguring the matched outdoor unit combination.
In the technical scheme, the mode of reconfiguring the outdoor unit combination is the same as the mode of reconfiguring the outdoor unit combination after responding to the operation instruction of the indoor unit system.
In any one of the above technical solutions, the outdoor unit is provided with an inverter scroll compressor.
In the technical scheme, the variable-frequency scroll compressor can reliably operate in the range of tens of hertz to more than one hundred hertz, and the compressor is favorable for further improving the output capacity and the adjustability of the compressor and enables each compressor to have the optimal energy efficiency output point in the multi-split heat pump air-conditioning system.
According to an aspect of the second aspect of the present invention, there is provided an operation control device including: a memory and a processor; a memory for storing a computer program; a processor for calling the computer program to execute the operation control method as defined in the technical solution of the first aspect of the present invention.
According to a third aspect of the present invention, there is provided a multi-split heat pump air conditioning system, including: the outdoor unit system and the indoor unit system are connected, the outdoor unit system comprises a plurality of outdoor units connected in parallel, and the operation control device defined in the technical scheme of the second aspect of the invention is respectively connected with the outdoor unit system and the indoor unit system, and the operation control device is suitable for executing the following operations: in response to an operation instruction of the indoor unit system, determining the required cooling power or heating power of the indoor unit system; determining at least one outdoor unit to be operated which is matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit; and configuring at least one outdoor unit to be operated to be in an operation state.
In the technical scheme, the outdoor unit is provided with the variable-frequency scroll compressor.
In the technical scheme, the variable-frequency scroll compressor can reliably operate in the range of tens of hertz to more than one hundred hertz, and the compressor is favorable for further improving the output capacity and the adjustability of the compressor and enables each compressor to have the optimal energy efficiency output point in the multi-split heat pump air-conditioning system.
According to an aspect of the fourth aspect of the present invention, there is also provided a computer-readable storage medium, on which a computer program is stored, the computer program, when executed, implementing the operation control method defined in the above aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 illustrates a schematic configuration diagram of a multi-split heat pump air conditioning system according to an embodiment of the present invention;
FIG. 2 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;
FIG. 3 illustrates a graphical representation of output power versus energy efficiency ratio in accordance with an embodiment of the present invention;
fig. 4 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, the multi-split heat pump air conditioning system according to the embodiment of the present invention includes an outdoor unit system and an indoor unit system (indoor unit 20) connected to each other, where the outdoor unit system includes a plurality of outdoor units connected in parallel, i.e., an outdoor unit 102A, an outdoor unit 102B, an outdoor unit 102C, an outdoor unit 102N, and N is the number of the outdoor units.
Wherein the external machine system is connected with the internal machine system by a pipeline 30.
An operation control method applicable to the multi-split heat pump air conditioning system is described below with reference to the following embodiments.
As shown in fig. 2, an operation control method according to an embodiment of the present invention includes:
step S202, in response to the operation instruction of the indoor unit system, determining the cooling power or the heating power required by the indoor unit system.
And step S204, determining at least one outdoor unit to be operated matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit.
Step S206, at least one outdoor unit to be operated is configured to be in an operation state.
In this embodiment, the operation control method is suitable for a multi-split heat pump air-conditioning system, the multi-split heat pump air-conditioning system includes an external unit system and an internal unit system which are connected, the external unit system includes a plurality of parallel-connected external units, and the reference output power can be understood as output power corresponding to optimal energy efficiency and/or better energy efficiency of the external units, so that at least one to-be-operated external unit which can satisfy cooling power or heating power is determined according to the reference output power, so as to control one or more external units which can satisfy the matching conditions among the plurality of parallel-connected external units to operate, and thus, the external units can be in an efficient operation state, and the requirements for indoor cooling or heating can be satisfied, thereby realizing energy-saving operation of the multi-split heat pump air-.
Specifically, a plurality of outdoor units connected in parallel are connected with an indoor unit system through a set of pipelines, so that the refrigeration power or heating power required by the indoor unit system is provided by a single outdoor unit, or the refrigeration power or heating power required by the indoor unit system is determined after the output power of the outdoor units is accumulated, and the refrigeration capacities (or heating capacities) of different outdoor units are the same or different, so that at least one outdoor unit meeting the requirements of high-efficiency operation and indoor refrigeration capacity or heating capacity is determined by determining the matching relationship between the refrigeration power or heating power required by the indoor unit system and the output power of the outdoor unit in the optimal energy efficiency state and/or the optimal energy efficiency state, and the outdoor unit is controlled to operate, so that the energy conservation of the multi-split heat pump air conditioning system is realized.
In the above embodiment, determining at least one outdoor unit matched with the cooling power or the heating power according to the reference output power of the outdoor unit specifically includes: determining the reference output power of each outdoor unit according to the energy efficiency ratio curve; configuring various outdoor unit combinations according to a plurality of outdoor units connected in parallel, wherein the outdoor unit combinations comprise at least one outdoor unit; determining the reference output power of each outdoor unit combination according to the reference output power, and recording as the combined reference power; determining one combined reference power matched with the cooling power or the heating power in the plurality of combined reference powers, and recording the one combined reference power as matched output power; and determining the outdoor unit combination corresponding to the matched output power, and recording the outdoor unit combination as the matched outdoor unit combination so as to determine the matched outdoor unit combination as at least one outdoor unit to be operated, wherein the combined reference power corresponds to a power interval or a power value.
In this embodiment, each outdoor unit has an energy efficiency ratio curve, and different energy efficiency ratios correspond to different output powers, so that the output power corresponding to the optimal energy efficiency and/or the better energy efficiency through the energy efficiency ratio curve is the aforementioned reference output power.
The outdoor units can be configured with various outdoor unit combinations, and the configuration mode can be determined by a combination formula, namely:
c is the number of all combinations of m elements (wherein m is not less than 1 and not more than n) taken out of n different elements.
After determining a plurality of outdoor unit combinations, determining the reference output power of the outdoor unit combination by adopting a mode of accumulating the reference output power of the outdoor units in the combination for each outdoor unit combination, and recording the reference output power as the combined output power, wherein the combined output power comprises the output power of a single outdoor unit.
The combined output power can be a value or a numerical interval, and the matched combined output power is determined by comparing the combined output power with the required refrigeration power or heating power so as to further determine the matched outdoor unit combination, thereby realizing the efficient operation of the matched outdoor unit.
In order to improve the matching rate, the reference output power is represented by a power interval.
In any of the above embodiments, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: configuring a plurality of reference power configuration intervals according to the plurality of combined reference powers; if the refrigerating power or the heating power belongs to any reference power configuration interval, recording the any reference power configuration interval as matching output power; and if the refrigerating power or the heating power does not belong to any reference power configuration interval, marking the reference power configuration interval which is greater than the refrigerating power or the heating power and is closest to the refrigerating power or the heating power as the matching output power.
As can be understood by those skilled in the art, if the required cooling power or heating power is greater than the reference output power of one outdoor unit and less than the sum of the reference output powers of two outdoor units, the two outdoor units are controlled to operate.
In any of the above embodiments, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: and if the detected refrigerating power or heating power belongs to the power interval of any single outdoor unit combination, configuring the power interval into matched output power so as to configure any single outdoor unit combination into the outdoor unit to be operated.
In this embodiment, a single outdoor unit combination means that there is only one outdoor unit in the combination, if the required cooling power or heating power is small, that is, when a single outdoor unit is adopted to satisfy the cooling or heating requirement, it is detected that the cooling power or heating power is right for a certain single outdoor unit combination, it indicates that the cooling power or heating power has high matching performance with the single outdoor unit combination, and the single outdoor unit combination is configured as an outdoor unit to be operated, so that a high energy efficiency ratio can be obtained, and operation energy saving is realized.
If the outdoor units have the same energy efficiency ratio curve, one outdoor unit can be selected to operate.
In any of the above embodiments, further comprising: the multiple single outdoor unit combinations comprise a first single outdoor unit and a second single outdoor unit, the first single outdoor unit corresponds to a first power interval, the second single outdoor unit corresponds to a second power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the first power threshold and smaller than a lower limit threshold of the second power threshold, the second power interval is configured to be matched with the output power, so that the second single outdoor unit is configured to be an outdoor unit to be operated.
In this embodiment, if it is not detected that the required cooling power or heating power is exactly in a certain single outdoor unit combination, but is between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any of the above embodiments, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: the multiple outdoor unit combinations comprise multiple outdoor unit combinations, if the fact that the refrigerating power or the heating power belongs to a power interval of any outdoor unit combination is detected, the power interval is configured to be matched with the output power, and any outdoor unit combination is configured to be an outdoor unit to be operated.
In this embodiment, a single outdoor unit combination means that there is only one outdoor unit in the combination, if the required cooling power or heating power is small, that is, when a single outdoor unit is adopted to satisfy the cooling or heating requirement, it is detected that the cooling power or heating power is right for a certain single outdoor unit combination, it indicates that the cooling power or heating power has high matching performance with the single outdoor unit combination, and the single outdoor unit combination is configured as an outdoor unit to be operated, so that a high energy efficiency ratio can be obtained, and operation energy saving is realized.
And if the power interval with the combination of the multiple outdoor units meets the requirements of refrigeration or heating, one of the multiple outdoor units is selected to operate in a combined mode.
In any of the above embodiments, further comprising: the multiple types of multi-outdoor unit combinations comprise a first outdoor unit combination and a second outdoor unit combination, the first outdoor unit combination corresponds to a third power interval, the second outdoor unit combination corresponds to a fourth power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the third power threshold and smaller than a lower limit threshold of the fourth power threshold, the fourth power interval is configured to be matched with output power, so that the second outdoor unit combination is configured to be an outdoor unit to be operated.
In this embodiment, if it is not detected that the required cooling power or heating power is exactly in a certain single outdoor unit combination, but is between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any of the above embodiments, the upper threshold is configured according to the maximum output power of the outdoor unit and a first coefficient, where the first coefficient is greater than or equal to 75% and less than or equal to 95%; the lower threshold is configured according to the maximum output power of the outdoor unit and a second coefficient, and the second coefficient is greater than or equal to 50% and less than or equal to 70%.
As shown in fig. 3, it is assumed that the output power of the outdoor unit 102A corresponding to the optimum capacity output segment (copmax) is < Qa to Qa' >.
Similarly, for the outdoor unit 102B, the output power corresponding to the optimum capacity output section (copmax) is < Qb to Qb' >.
For the outdoor unit 102C, the output power corresponding to the optimum capacity output section (i.e., copmax) is < Qc to Qc' >.
For an outdoor unit combination of two outdoor units, the output power corresponding to the best capacity output segment (i.e. copmax) may be: < Qa to Qa '> + < Qb to Qb' > and the like.
For the outdoor unit combination of the three outdoor units, the reference output power of one outdoor unit is continuously increased on the basis of the two combinations, and the output powers corresponding to the output sections (i.e. copmax) are sorted from small to large.
The method comprises the following steps of starting an internal machine of the system, calculating capacity requirements, namely refrigerating power or heating power Q required by the internal machine system, and comparing the capacities of the refrigerating power or the heating power Q:
1) if Qb is less than Q and less than Qb', the system only opens the outdoor unit 102B;
2) if Qb' is less than Q and less than Qc, the system only starts the outdoor unit 102C;
3) if Q is in the range of < Qb-Qb '> + < Qc-Qc' >, the system turns on the outdoor unit 102B and the outdoor unit 102C;
4) if < Qa to Qa '> < Qb to Qb' > < Q < Qb to Qb '> < Qc to Qc' >, the system turns on the outdoor unit 102B and the outdoor unit 102C.
If the load of the internal machine changes, the load is compared again, the corresponding output system is adjusted, and all the started external machines are always kept in the high-energy-efficiency output section.
In any of the above embodiments, further comprising: and if the change of the cooling power or the heating power is detected, reconfiguring the matched outdoor unit combination.
In this embodiment, the outdoor unit combination is reconfigured in the same manner as that after the operation instruction of the indoor unit system is responded.
In any of the above embodiments, the outdoor unit is provided with an inverter scroll compressor.
In the embodiment, the variable-frequency scroll compressor can reliably operate in the range of tens of hertz to more than one hundred hertz, and the compressor is favorable for further improving the output capacity and the adjustability of the compressor and enabling each compressor to have the optimal energy efficiency output point in the multi-split heat pump air-conditioning system.
As shown in fig. 4, the operation control device 40 according to the embodiment of the present invention includes: a memory 402 and a processor 404; a memory 402 for storing a computer program; and a processor 404 for calling a computer program to execute the operation control method described in the above embodiment.
According to an embodiment of the present invention, a multi-split heat pump air conditioning system includes: the connected outdoor unit system and indoor unit system, the outdoor unit system includes a plurality of outdoor units connected in parallel, the operation control device 40 as described in the above embodiment is respectively connected to the outdoor unit system and the indoor unit system, and the operation control device is adapted to perform the following operations: in response to an operation instruction of the indoor unit system, determining the required cooling power or heating power of the indoor unit system; determining at least one outdoor unit to be operated which is matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit; and configuring at least one outdoor unit to be operated to be in an operation state.
In the above embodiment, the outdoor unit is provided with the inverter scroll compressor.
In the embodiment, the variable-frequency scroll compressor can reliably operate in the range of tens of hertz to more than one hundred hertz, and the compressor is favorable for further improving the output capacity and the adjustability of the compressor and enabling each compressor to have the optimal energy efficiency output point in the multi-split heat pump air-conditioning system.
A computer-readable storage medium according to an embodiment of the present invention, having stored thereon a computer program that, when executed, implements: in response to an operation instruction of the indoor unit system, determining the required cooling power or heating power of the indoor unit system; determining at least one outdoor unit to be operated which is matched with the refrigerating power or the heating power according to the reference output power of the outdoor unit; and configuring at least one outdoor unit to be operated to be in an operation state.
In the technical scheme, the operation control method is suitable for a multi-split heat pump air-conditioning system, the multi-split heat pump air-conditioning system comprises an outer unit system and an inner unit system which are connected, the outer unit system comprises a plurality of outdoor units which are connected in parallel, and reference output power can be understood as output power corresponding to the optimal energy efficiency and/or the better energy efficiency of the outdoor units, so that at least one outdoor unit to be operated which can meet the refrigeration power or the heating power is determined according to the reference output power, one or more outdoor units which can meet the matching conditions in the plurality of outdoor units which are connected in parallel are controlled to operate, the outdoor units can be in an efficient operation state, the requirements for indoor refrigeration or heating can be met, and the energy-saving operation of the multi-split heat pump air-conditioning system.
Specifically, a plurality of outdoor units connected in parallel are connected with an indoor unit system through a set of pipelines, so that the refrigeration power or heating power required by the indoor unit system is provided by a single outdoor unit, or the refrigeration power or heating power required by the indoor unit system is determined after the output power of the outdoor units is accumulated, and the refrigeration capacities (or heating capacities) of different outdoor units are the same or different, so that at least one outdoor unit meeting the requirements of high-efficiency operation and indoor refrigeration capacity or heating capacity is determined by determining the matching relationship between the refrigeration power or heating power required by the indoor unit system and the output power of the outdoor unit in the optimal energy efficiency state and/or the optimal energy efficiency state, and the outdoor unit is controlled to operate, so that the energy conservation of the multi-split heat pump air conditioning system is realized.
In the above technical solution, determining at least one outdoor unit matched with the cooling power or the heating power according to the reference output power of the outdoor unit specifically includes: determining the reference output power of each outdoor unit according to the energy efficiency ratio curve; configuring various outdoor unit combinations according to a plurality of outdoor units connected in parallel, wherein the outdoor unit combinations comprise at least one outdoor unit; determining the reference output power of each outdoor unit combination according to the reference output power, and recording as the combined reference power; determining one combined reference power matched with the cooling power or the heating power in the plurality of combined reference powers, and recording the one combined reference power as matched output power; and determining the outdoor unit combination corresponding to the matched output power, and recording the outdoor unit combination as the matched outdoor unit combination so as to determine the matched outdoor unit combination as at least one outdoor unit to be operated, wherein the combined reference power corresponds to a power interval or a power value.
In this technical solution, each outdoor unit has an energy efficiency ratio curve, and different energy efficiency ratios corresponding to different output powers, so that the output power corresponding to the optimal energy efficiency and/or the more optimal energy efficiency through the energy efficiency ratio curve is the aforementioned reference output power.
The outdoor units can be configured with various outdoor unit combinations, and the configuration mode can be determined by a combination formula, namely:
c is the number of all combinations of m elements (wherein m is not less than 1 and not more than n) taken out of n different elements.
After determining a plurality of outdoor unit combinations, determining the reference output power of the outdoor unit combination by adopting a mode of accumulating the reference output power of the outdoor units in the combination for each outdoor unit combination, and recording the reference output power as the combined output power, wherein the combined output power comprises the output power of a single outdoor unit.
The combined output power can be a value or a numerical interval, and the matched combined output power is determined by comparing the combined output power with the required refrigeration power or heating power so as to further determine the matched outdoor unit combination, thereby realizing the efficient operation of the matched outdoor unit.
In order to improve the matching rate, the reference output power is represented by a power interval.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: configuring a plurality of reference power configuration intervals according to the plurality of combined reference powers; if the refrigerating power or the heating power belongs to any reference power configuration interval, recording the any reference power configuration interval as matching output power; and if the refrigerating power or the heating power does not belong to any reference power configuration interval, marking the reference power configuration interval which is greater than the refrigerating power or the heating power and is closest to the refrigerating power or the heating power as the matching output power.
As can be understood by those skilled in the art, if the required cooling power or heating power is greater than the reference output power of one outdoor unit and less than the sum of the reference output powers of two outdoor units, the two outdoor units are controlled to operate.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: and if the detected refrigerating power or heating power belongs to the power interval of any single outdoor unit combination, configuring the power interval into matched output power so as to configure any single outdoor unit combination into the outdoor unit to be operated.
In the technical scheme, the combination of the single outdoor units means that only one outdoor unit is arranged in the combination, if the required refrigerating power or heating power is small, namely when the single outdoor unit can meet the refrigerating or heating requirement, the refrigerating power or the heating power is detected to just belong to a certain combination of the single outdoor units, the refrigerating power or the heating power is indicated to be higher in matching with the combination of the single outdoor units, the combination of the single outdoor units is configured into the outdoor unit to be operated, the higher energy efficiency ratio can be obtained, and the operation energy saving is realized.
If the outdoor units have the same energy efficiency ratio curve, one outdoor unit can be selected to operate.
In any one of the above technical solutions, the method further includes: the multiple single outdoor unit combinations comprise a first single outdoor unit and a second single outdoor unit, the first single outdoor unit corresponds to a first power interval, the second single outdoor unit corresponds to a second power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the first power threshold and smaller than a lower limit threshold of the second power threshold, the second power interval is configured to be matched with the output power, so that the second single outdoor unit is configured to be an outdoor unit to be operated.
In the technical scheme, if the required refrigerating power or heating power is not detected to be just a combination of a certain single outdoor unit but between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any one of the above technical solutions, determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes: the multiple outdoor unit combinations comprise multiple outdoor unit combinations, if the fact that the refrigerating power or the heating power belongs to a power interval of any outdoor unit combination is detected, the power interval is configured to be matched with the output power, and any outdoor unit combination is configured to be an outdoor unit to be operated.
In the technical scheme, the combination of the single outdoor units means that only one outdoor unit is arranged in the combination, if the required refrigerating power or heating power is small, namely when the single outdoor unit can meet the refrigerating or heating requirement, the refrigerating power or the heating power is detected to just belong to a certain combination of the single outdoor units, the refrigerating power or the heating power is indicated to be higher in matching with the combination of the single outdoor units, the combination of the single outdoor units is configured into the outdoor unit to be operated, the higher energy efficiency ratio can be obtained, and the operation energy saving is realized.
And if the power interval with the combination of the multiple outdoor units meets the requirements of refrigeration or heating, one of the multiple outdoor units is selected to operate in a combined mode.
In any one of the above technical solutions, the method further includes: the multiple types of multi-outdoor unit combinations comprise a first outdoor unit combination and a second outdoor unit combination, the first outdoor unit combination corresponds to a third power interval, the second outdoor unit combination corresponds to a fourth power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the third power threshold and smaller than a lower limit threshold of the fourth power threshold, the fourth power interval is configured to be matched with output power, so that the second outdoor unit combination is configured to be an outdoor unit to be operated.
In the technical scheme, if the required refrigerating power or heating power is not detected to be just a combination of a certain single outdoor unit but between two power intervals, in order to meet the output requirement, the outdoor unit with the larger power interval is determined as the outdoor unit to be operated.
In any of the above technical solutions, the upper threshold is configured according to the maximum output power of the outdoor unit and a first coefficient, where the first coefficient is greater than or equal to 75% and less than or equal to 95%; the lower threshold is configured according to the maximum output power of the outdoor unit and a second coefficient, and the second coefficient is greater than or equal to 50% and less than or equal to 70%.
In any one of the above technical solutions, the method further includes: and if the change of the cooling power or the heating power is detected, reconfiguring the matched outdoor unit combination.
In the technical scheme, the mode of reconfiguring the outdoor unit combination is the same as the mode of reconfiguring the outdoor unit combination after responding to the operation instruction of the indoor unit system.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having a computer-usable computer program embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.
Claims (11)
1. An operation control method is suitable for a multi-split heat pump air-conditioning system, the multi-split heat pump air-conditioning system comprises an external unit system and an internal unit system which are connected, the external unit system comprises a plurality of outdoor units which are connected in parallel, and the operation control method comprises the following steps:
responding to an operation instruction of the indoor unit system, and determining the required cooling power or heating power of the indoor unit system;
determining at least one outdoor unit to be operated, which is matched with the cooling power or the heating power, according to a reference output power of the outdoor unit;
configuring at least one outdoor unit to be operated in an operation state.
2. The operation control method according to claim 1, wherein the determining at least one of the outdoor units that matches the cooling power or the heating power according to the reference output power of the outdoor unit, specifically comprises:
determining the reference output power of each outdoor unit according to an energy efficiency ratio curve;
configuring various outdoor unit combinations according to the plurality of outdoor units connected in parallel, wherein the outdoor unit combinations comprise at least one outdoor unit;
determining the reference output power of each outdoor unit combination according to the reference output power, and recording the reference output power as a combined reference power;
determining one of the combined reference powers which matches the cooling power or the heating power, and recording the one of the combined reference powers as a matching output power;
determining the outdoor unit combination corresponding to the matched output power and recording as a matched outdoor unit combination so as to determine the matched outdoor unit combination as at least one outdoor unit to be operated,
wherein the combined reference power corresponds to a power interval or power value.
3. The operation control method according to claim 2, wherein the determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes:
configuring a plurality of reference power configuration intervals according to the plurality of combined reference powers;
if the refrigeration power or the heating power belongs to any reference power configuration interval, recording any reference power configuration interval as the matching output power;
and if the refrigerating power or the heating power does not belong to any reference power configuration interval, marking the reference power configuration interval which is larger than the refrigerating power or the heating power and is closest to the refrigerating power or the heating power as the matching output power.
4. The operation control method according to claim 2, wherein the determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes:
the plurality of outdoor unit combinations comprise a plurality of single outdoor unit combinations, and if the refrigeration power or the heating power is detected to belong to the power interval of any one of the single outdoor unit combinations, the power interval is configured to be the matched output power, so that any one of the single outdoor unit combinations is configured to be the outdoor unit to be operated.
5. The operation control method according to claim 4, characterized by further comprising:
the multiple single outdoor unit combinations comprise a first single outdoor unit and a second single outdoor unit, the first single outdoor unit corresponds to a first power interval, the second single outdoor unit corresponds to a second power interval, and if the refrigerating power or the heating power is larger than an upper threshold of the first power threshold and smaller than a lower threshold of the second power threshold, the second power interval is configured to be the matching output power, so that the second single outdoor unit is configured to be the outdoor unit to be operated.
6. The operation control method according to claim 2, wherein the determining one of the plurality of combined reference powers that matches the cooling power or the heating power specifically includes:
the multiple outdoor unit combinations comprise multiple outdoor unit combinations, and if the refrigeration power or the heating power is detected to belong to the power interval of any one outdoor unit combination, the power interval is configured to be the matched output power, and any one outdoor unit combination is configured to be the outdoor unit to be operated.
7. The operation control method according to claim 6, characterized by further comprising:
the multiple types of multi-outdoor unit combinations comprise a first outdoor unit combination and a second outdoor unit combination, the first outdoor unit combination corresponds to a third power interval, the second outdoor unit combination corresponds to a fourth power interval, and if the refrigerating power or the heating power is larger than an upper limit threshold of the third power threshold and smaller than a lower limit threshold of the fourth power threshold, the fourth power interval is configured to be the matching output power, so that the second outdoor unit combination is configured to be the outdoor unit to be operated.
8. The operation control method according to claim 5 or 7,
the upper limit threshold is configured according to the maximum output power of the outdoor unit and a first coefficient, and the first coefficient is greater than or equal to 75% and less than or equal to 95%;
the lower threshold is configured according to a maximum output power of the outdoor unit and a second coefficient, and the second coefficient is greater than or equal to 50% and less than or equal to 70%.
9. The operation control method according to any one of claims 2 to 7, characterized by further comprising:
and if the change of the refrigerating power or the heating power is detected, reconfiguring the matching outdoor unit combination.
10. A multi-split heat pump air conditioning system, comprising:
the outdoor unit system and the indoor unit system are connected, and the outdoor unit system comprises a plurality of outdoor units connected in parallel; and
a memory and a processor, wherein the processor is capable of,
the memory for storing a computer program;
the processor is connected to the external machine system and the internal machine system, and is configured to call the computer program to perform the steps of the operation control method according to any one of claims 1 to 9.
11. A computer-readable storage medium, characterized in that a computer program is stored thereon, which when executed by a processor implements the operation control method of any one of claims 1 to 9.
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