CN116202189A - Control method and device of air conditioning unit and electronic equipment - Google Patents
Control method and device of air conditioning unit and electronic equipment Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 174
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- 238000010438 heat treatment Methods 0.000 claims abstract description 59
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- 230000033228 biological regulation Effects 0.000 claims abstract description 7
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- 238000004364 calculation method Methods 0.000 claims description 20
- 238000005057 refrigeration Methods 0.000 claims description 16
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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
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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
- F24F11/62—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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention provides a control method and device of an air conditioning unit and electronic equipment. Wherein the method comprises the following steps: determining a load regulation target value of an air conditioning unit; acquiring operation condition parameters of each compressor, and calculating first optimal efficiency and first workload of each compressor based on the operation condition parameters; the first optimal efficiency and the first workload of each compressor are alternately arranged and combined to obtain the second optimal efficiency and the second workload of the air conditioning unit; determining a target optimal efficiency and a target workload from a second optimal efficiency and a second workload of the plurality of air conditioning units based on the load adjustment target value; and controlling the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload. In the mode, the air conditioning system can adapt to the condition that the specifications of the various compressors in the air conditioning system are different, and the energy efficiency of the air conditioning system can be improved.
Description
Technical Field
The present invention relates to the field of compressors, and in particular, to a control method and apparatus for an air conditioning unit, and an electronic device.
Background
At present, a multi-compressor cold water (heat pump) unit in the industry generally adopts a plurality of air conditioners with the same model or specification, and the design can make the control method of the unit on each compressor relatively simpler. The control method of the typical air conditioning unit comprises the following steps: for the compressors (not all compressors) which are already operated, the refrigeration capacity and the operation efficiency of each compressor are approximately considered to be the same at the moment according to the principle that the power or the current is equal. When the unit is loaded, each compressor is loaded with the same power or current proportion until the power or current of the running compressor is full, and then the non-running compressor is started; similarly, when the unit is unloaded, each compressor is unloaded (reduced) by the same power or current until the lowest capacity limit of the compressor has been reached, and one of the compressors that is already operating is shut down.
However, the above-described control method of the air conditioning unit has two significant drawbacks. Firstly, when the types and specifications of a plurality of compressors used by a cold water (heat pump) unit are different, the original control method cannot well judge the refrigeration capacity distribution of each compressor and the increase and decrease of the running number of the compressors; secondly, the existing control method can enable the refrigerating capacity of the air conditioning unit to meet the requirements of a user water system by adjusting the operation parameters of the compressor, but is not based on the principle of optimal efficiency of the compressor, so that the energy efficiency of the air conditioning unit is poor.
Disclosure of Invention
Therefore, the invention aims to provide a control method, a control device and electronic equipment of an air conditioning unit, which are suitable for the situation that the specifications of various compressors in the air conditioning unit are different, and can improve the energy efficiency of the air conditioning unit.
In a first aspect, an embodiment of the present invention provides a control method of an air conditioning unit, applied to an air conditioning unit, where the air conditioning unit includes a plurality of compressors, the method includes: determining a load regulation target value of an air conditioning unit; acquiring operation condition parameters of each compressor, and calculating first optimal efficiency and first workload of each compressor based on the operation condition parameters; wherein the maximum value of the first workload characterizes the maximum refrigerating capacity or the maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes the minimum refrigerating capacity or the minimum heating capacity of the compressor under the first optimal efficiency; the first optimal efficiency and the first workload of each compressor are alternately arranged and combined to obtain the second optimal efficiency and the second workload of the air conditioning unit; the maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload represents the minimum refrigerating capacity or the minimum heating capacity of the air conditioning unit under the first optimal efficiency; determining a target optimal efficiency and a target workload from a second optimal efficiency and a second workload of the air conditioning unit based on the load adjustment target value; and controlling the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload.
In a preferred embodiment of the present application, the air conditioning unit includes: a controller of an air conditioning unit, a plurality of compressors, sensors of the plurality of compressors, a controller of the plurality of compressors, and an actuator of the plurality of compressors.
In a preferred embodiment of the present application, the step of determining the load adjustment target value of the air conditioning unit includes: the controller of the air conditioning unit determines a load adjustment target value of the air conditioning unit based on the change curve of the target water temperature and the current water temperature.
In a preferred embodiment of the present application, the step of obtaining the operation condition parameters of each compressor includes: the sensors of the plurality of compressors acquire operating condition parameters of the compressors.
In a preferred embodiment of the present application, the controller of the compressor stores a performance database in advance; the performance database comprises the corresponding relation between the operation condition parameters of the compressor and the first optimal efficiency and the first workload of the compressor; the step of calculating the first optimal efficiency and the first workload of each compressor based on the operation condition parameters comprises the following steps: the operating condition parameters are input into a performance database, and a first optimal efficiency and a first workload of the compressor are output.
In a preferred embodiment of the present application, the step of obtaining the second best efficiency and the second workload of the air conditioning unit by the calculation of the first best efficiency and the first workload of each compressor in a cross arrangement and combination manner includes: and the controller of the air conditioning unit is used for carrying out cross arrangement and combination calculation on the first optimal efficiency and the first workload of each compressor to obtain the second optimal efficiency and the second workload of the air conditioning unit.
In a preferred embodiment of the present application, the step of determining the target optimal efficiency and the target workload from the second optimal efficiency and the second workload of the air conditioning unit based on the load adjustment target value includes: determining a third optimal efficiency and a third workload from the second optimal efficiency and the second workload of the air conditioning unit; wherein the minimum value of the third workload is less than the load adjustment target value, and the load adjustment target value is less than the maximum value of the third workload; the maximum value of the third optimal efficiency is set as the target optimal efficiency, and the third workload corresponding to the target optimal efficiency is set as the target workload.
In a preferred embodiment of the present application, the maximum value of the third best efficiency corresponds to a plurality of third workloads; the step of taking the third workload corresponding to the target optimal efficiency as the target workload comprises the following steps: determining a plurality of compressor operation times corresponding to a third workload corresponding to a maximum value of the third optimal efficiency; and taking a third workload corresponding to the minimum value of the running time of the compressor as a target workload.
In a preferred embodiment of the present application, the step of determining the target optimal efficiency and the target workload from the second optimal efficiency and the second workload of the air conditioning unit based on the load adjustment target value includes: if the third workload does not exist, calculating the difference value between the minimum value of each second workload and the load adjustment target value; taking the second workload corresponding to the minimum value of the difference value as a target workload; and taking the second best efficiency corresponding to the target workload as the target best efficiency.
In a preferred embodiment of the present application, the step of controlling the air conditioning unit to perform the cooling or heating operation based on the target optimal efficiency and the target workload includes: the actuators of the compressors are controlled based on the target optimal efficiency and the target workload to cause the respective compressors to perform a cooling or heating operation.
In a preferred embodiment of the present application, the air conditioning unit is a water chiller or a heat pump unit.
In a second aspect, an embodiment of the present invention further provides a control device of an air conditioning unit, applied to the air conditioning unit, where the air conditioning unit includes a plurality of compressors, and the device includes: the load regulation target value determining module is used for determining a load regulation target value of the air conditioning unit; the first optimal efficiency and first work load calculation module is used for obtaining operation condition parameters of each compressor and calculating first optimal efficiency and first work load of each compressor based on the operation condition parameters; wherein the maximum value of the first workload characterizes the maximum refrigerating capacity or the maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes the minimum refrigerating capacity or the minimum heating capacity of the compressor under the first optimal efficiency; the second optimal efficiency and second work load calculation module is used for carrying out cross arrangement and combination calculation on the first optimal efficiency and the first work load of each compressor to obtain the second optimal efficiency and the second work load of the air conditioning unit; the maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload represents the minimum refrigerating capacity or the minimum heating capacity of the air conditioning unit under the first optimal efficiency; a target optimal efficiency and target workload calculation module for determining a target optimal efficiency and target workload from a second optimal efficiency and second workload of the plurality of air conditioning units based on the load adjustment target value; and the air conditioning unit operation module is used for controlling the air conditioning unit to execute refrigeration or heating operation based on the target optimal efficiency and the target workload.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, where the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the control method of an air conditioning unit.
In a fourth aspect, embodiments of the present invention further provide a computer-readable storage medium storing computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the control method of an air conditioning unit described above.
The embodiment of the invention has the following beneficial effects:
according to the control method, the control device and the electronic equipment of the air conditioning unit, the first optimal efficiency and the first workload of each compressor are calculated based on the operation condition parameters, the first optimal efficiency and the first workload of each compressor are calculated in a cross arrangement and combination mode to obtain the second optimal efficiency and the second workload of the air conditioning unit, the target optimal efficiency and the target workload are determined from the second optimal efficiency and the second workload, and refrigerating or heating operation of the air conditioning unit is controlled based on the target optimal efficiency and the target workload.
In this embodiment, the cooling capacity and heating capacity to be achieved by each compressor can be well calculated and distributed, and the number of compressors to be operated can be controlled to be increased and decreased, regardless of whether the model specifications and performance characteristics of the plurality of compressors in the air conditioning unit are the same or not. And the operation of the optimal efficiency operation permutation and combination of the multiple compressors can be carried out and the optimal solution is sought according to the actual operation conditions of the compressors on the premise of meeting the requirements of the refrigerating capacity or heating capacity of users, so that the multiple air conditioning unit can operate in the optimal energy efficiency state during load adjustment, the unit power consumption is saved, and the energy conservation and emission reduction of the building are realized.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the disclosure.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system of a double-compressor water-cooled cold water (heat pump) unit provided by an embodiment of the invention;
fig. 2 is a flowchart of a control method of an air conditioning unit according to an embodiment of the present invention;
FIG. 3 is a flowchart of another control method of an air conditioning unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a control system principle of an air conditioning unit according to an embodiment of the present invention;
fig. 5 is a logic schematic diagram of a control method of an air conditioning unit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a compressor performance database and operating principle provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Currently, referring to the schematic diagram of a dual-compressor water-cooled cold water (heat pump) unit system shown in fig. 1, in the industry, a multi-compressor cold water (heat pump) unit generally adopts a plurality of air conditioners with the same model or specification (i.e., the compressors 1 and 2 in fig. 1 adopt the same model or specification), so that the control method of the unit on each compressor can be relatively simple by design. The control method of the typical air conditioning unit in the industry is as follows: for the compressors (not all compressors) which are already operated, the refrigeration capacity and the operation efficiency of each compressor are approximately considered to be the same at the moment according to the principle that the power or the current is equal. When the unit is loaded, each compressor is loaded with the same power or current proportion until the power or current of the running compressor is full, and then the non-running compressor is started; similarly, when the unit is unloaded, each compressor is unloaded (reduced) by the same power or current until the lowest capacity limit of the compressor has been reached, and one of the compressors that is already operating is shut down.
However, the above-described control method of the conventional air conditioning unit has two significant drawbacks. Firstly, when the types and specifications of a plurality of compressors used by a cold water (heat pump) unit are different, the original control method cannot well judge the refrigeration capacity distribution of each compressor and the increase and decrease of the running number of the compressors; secondly, the existing control method can enable the refrigerating capacity of the air conditioning unit to meet the requirements of a user water system by adjusting the operation parameters of the compressor, but is not based on the principle of optimal efficiency of the compressor, so that the energy efficiency of the air conditioning unit is poor. Based on the above, the embodiment of the invention provides a control method and device of an air conditioning unit and electronic equipment, and particularly relates to an energy efficiency optimal control method of a multi-compressor cold water (heat pump) unit.
For the convenience of understanding the present embodiment, a detailed description will be given of a control method of an air conditioning unit disclosed in the embodiment of the present invention.
Embodiment one:
the embodiment of the invention provides a control method of an air conditioning unit, which is applied to the air conditioning unit, wherein the air conditioning unit comprises a plurality of compressors, and the control method of the air conditioning unit comprises the following steps of:
step S202, a load adjustment target value of the air conditioning unit is determined.
The air conditioning unit provided by the embodiment of the invention comprises a plurality of compressors, wherein the compressors can be of the same type or specification, and can also be of different types and specifications. The compressor can be used for refrigerating or heating, and correspondingly, the air conditioning unit can be a water chilling unit or a heat pump unit.
The load adjustment target value of the air conditioning unit may be understood as a cooling capacity or a heating capacity which the user wants to generate when the air conditioning unit operates. The user may input the target water temperature, and the load adjustment target value of the air conditioning unit may be calculated based on the target water temperature input by the user.
Step S204, operation condition parameters of each compressor are obtained, and first optimal efficiency and first workload of each compressor are calculated based on the operation condition parameters.
The operation condition parameters of the compressor can comprise parameters such as temperature, humidity, current and the like of the compressor. The maximum value of the first workload represents the maximum refrigerating capacity or the maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes a minimum refrigeration capacity or a minimum heating capacity of the compressor at a first optimal efficiency.
Step S206, the first optimal efficiency and the first workload of each compressor are cross-arranged and combined to obtain the second optimal efficiency and the second workload of the air conditioning unit.
The maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload characterizes a minimum cooling capacity or a minimum heating capacity of the air conditioning unit under the first optimal efficiency.
After determining the first optimal efficiency and the first workload of each compressor, the first optimal efficiency and the first workload of each compressor may be arranged and combined in a plurality of ways, so as to obtain the second optimal efficiency and the second workload of the air conditioning unit.
Step S208, determining a target optimal efficiency and a target workload from the second optimal efficiency and the second workload of the air conditioning unit based on the load adjustment target value.
According to certain screening rules, an optimal efficiency and workload, which is called a target optimal efficiency and target workload, can be determined from the second optimal efficiency and second workload of the plurality of air conditioning units based on the load adjustment target value. The screening rule can be set based on the principle of optimal efficiency of the compressors, so that a control strategy of multi-compressor refrigerating capacity distribution and addition and subtraction of the number of the compressors is performed, the compressors can be in optimal efficiency, and the air conditioning unit can be in optimal energy efficiency.
Step S210, controlling the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload.
After the target optimal efficiency and the target workload are determined, the compressor in the air conditioning unit can be controlled to run or shut down according to the target optimal efficiency and the target workload so as to control the air conditioning unit to perform a cooling or heating operation.
According to the control method, the control device and the electronic equipment of the air conditioning unit, first optimal efficiency and first workload of each compressor are calculated based on operation condition parameters, second optimal efficiency and second workload of the air conditioning unit are determined based on the first optimal efficiency and the first workload of each compressor, target optimal efficiency and target workload are determined from the second optimal efficiency and the second workload, and refrigerating or heating operation of the air conditioning unit is controlled based on the target optimal efficiency and the target workload.
Embodiment two:
the present embodiment provides another control method of an air conditioning unit, which is implemented on the basis of the above embodiment, and focuses on the specific implementation step of determining the target optimal efficiency and the target workload from the second optimal efficiencies and the second workloads of the plurality of air conditioning units based on the load adjustment target values. As shown in fig. 3, the control method of the air conditioning unit in the embodiment includes the following steps:
step S302, a load adjustment target value of the air conditioning unit is determined.
Specifically, the air conditioning unit includes: a controller of an air conditioning unit (which may also be referred to as a unit controller), a plurality of compressors, sensors of the plurality of compressors, a controller of the plurality of compressors, and an actuator of the plurality of compressors. Referring to a schematic diagram of the control system principle of an air conditioning unit shown in fig. 4, the air conditioning unit in fig. 4 includes n compressors, each of which corresponds to a controller, an actuator and a sensor, and the controllers of the air conditioning unit are all in communication connection with the controllers of the n compressors.
The sensors of the 1-n # compressors can collect parameters such as pressure, temperature, current and the like, and the executors of the 1-n # compressors can perform capacity adjustment, rotation speed adjustment and the like of the compressors. And databases or mathematical models (functions, equations, association type and the like) of refrigerating (heating) quantity and efficiency and actuator action parameters of the corresponding compressors under different operation conditions are respectively stored in the controllers of the 1 # compressor to the n # compressor.
Furthermore, if the compressor model and specification are the same or the number of compressors is small, the compressor controller may be omitted, and instead the functions, software, database, and coupling relationship with the compressor sensors and actuators of the compressor controller are all integrated into the stack controller. In addition, the functions, software, databases, and the coupling relationship with the crew sensors and actuators can also be integrated into the compressor controller, thereby omitting the crew controller.
Specifically, the controller of the air conditioning unit may determine the load adjustment target value of the air conditioning unit based on the change curve of the target water temperature and the current water temperature.
Referring to a logic schematic diagram of a control method of an air conditioning unit shown in fig. 5, a unit controller may calculate a load adjustment target value of cooling (heating) of the unit according to a change curve of a target water temperature and a current actual water temperature set by a user.
Step S304, operation condition parameters of each compressor are obtained, and first optimal efficiency and first workload of each compressor are calculated based on the operation condition parameters.
Specifically, the sensors of the plurality of compressors may obtain the operating condition parameters of the compressors. The controller of the compressor may input the operating condition parameters into a performance database and output a first optimal efficiency and a first workload of the compressor.
As shown in fig. 5, the controller of the 1-n # compressor calculates the operation condition parameters of the compressor through the parameters acquired by the corresponding sensors and the actuator. Because the controller of the compressor is pre-stored with a performance database, based on the actual operation condition parameters of the compressor as input, the maximum and minimum refrigeration (heating) quantities, namely the first optimal efficiency and the first workload, of the compressor are calculated according to the performance database in the controller of the compressor.
Wherein, referring to a schematic diagram of a compressor performance database and operating principle shown in fig. 6, the compressor can be operated at an optimal efficiency within the boundaries of the maximum and minimum values of the first workload as shown in fig. 6.
Step S306, the first optimal efficiency and the first workload of each compressor are cross-arranged and combined to obtain the second optimal efficiency and the second workload of the air conditioning unit.
Specifically, the controller of the air conditioning unit may perform cross-permutation and combination calculation on the first optimal efficiency and the first workload of each compressor to obtain the second optimal efficiency and the second workload of the air conditioning unit.
As shown in fig. 5, after receiving the optimal efficiency and the maximum and minimum refrigerating (heating) amounts under the optimal efficiency uploaded by each compressor controller, the unit controller performs a cross permutation and combination operation with different numbers of compressor operations and different operation serial numbers, so as to obtain the unit optimal efficiency and the maximum and minimum refrigerating (heating) amounts under the unit optimal efficiency when multiple compressor operations are combined.
The cross permutation and combination may be a weighted calculation, for example: the first best efficiency of the No. 1 compressor is 85%, the first workload is 500-700, and the weight is 600; the first optimum efficiency of the No. 2 compressor is 83%, the first working amount is 200-4700, the weight is 300, the second optimum efficiency of the air conditioning unit is obtained by = (85% ×600+83% ×300)/900=84.33%, the minimum value of the second working amount = (500×600+200×300)/900=400, and the maximum value of the second working amount = (500×700+200×2700)/900= 988.89.
Step S308, determining a third optimal efficiency and a third workload from the second optimal efficiency and the second workload of the air conditioning unit; wherein the minimum value of the third workload is less than the load adjustment target value, and the load adjustment target value is less than the maximum value of the third workload.
In step S310, the maximum value of the third optimal efficiency is set as the target optimal efficiency, and the third workload corresponding to the target optimal efficiency is set as the target workload.
The embodiment of the invention can provide a mode of multistage screening target workload, and the first stage of condition screening: and (3) only reserving the compressor operation combination (namely third optimal efficiency and third workload) of 'the minimum refrigeration (heating) quantity under the optimal efficiency of the unit < the unit load adjustment target value < the maximum refrigeration (heating) quantity under the optimal efficiency of the unit', and then sequencing according to the optimal efficiency value of the unit from high to low, wherein the highest efficiency is the optimal solution of the optimal control method of the unit energy efficiency.
If the optimal solution of the first-stage condition screening is not unique (i.e., the maximum value of the third best efficiency corresponds to a plurality of third workloads), the following steps may be performed to perform the second-stage condition screening: determining a plurality of compressor operation times corresponding to a third workload corresponding to a maximum value of the third optimal efficiency; and taking a third workload corresponding to the minimum value of the running time of the compressor as a target workload. When the optimal solutions are 2 or more, the screening condition is the operation combination of the 'least time length of the compressor' so as to ensure the service life balance of each compressor.
If the optimal solution for the first level of condition screening is 0 (i.e., there is no third workload), the following steps may be performed to perform the second level of condition screening: if the third workload does not exist, calculating the difference value between the minimum value of each second workload and the load adjustment target value; taking the second workload corresponding to the minimum value of the difference value as a target workload; and taking the second best efficiency corresponding to the target workload as the target best efficiency.
When the optimal solution is 0, in order to ensure the refrigerating (heating) capacity requirement of the user, the operation combination of 'the unit load adjustment target value < the minimum refrigerating (heating) capacity under the optimal efficiency of the unit' and 'the minimum refrigerating (heating) capacity under the optimal efficiency of the unit-the overall target value of the unit load adjustment = minimum min' is adopted.
Step S312 controls the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload.
Specifically, actuators of the compressors may be controlled based on the target optimal efficiency and the target workload to cause the respective compressors to perform a cooling or heating operation.
Generally, when the compressor is operated in its optimum efficiency interval, the compressor is operated in an area where reliability and safety are good, and thus, stability of the unit is improved and risk of malfunction of the compressor is reduced. Therefore, the control method provided by the embodiment of the invention not only can improve the operation energy efficiency of the unit and realize energy conservation and emission reduction, but also can improve the stability of the unit and reduce the risk of compressor faults.
The method provided by the embodiment of the invention can ensure that the cooling capacity which is required to be achieved by each compressor can be well calculated and distributed no matter whether the model specifications and the performance characteristics of a plurality of compressors used are the same or not, and the control of increasing and reducing the running number of the compressors can be carried out.
According to the method provided by the embodiment of the invention, on the premise of meeting the refrigerating (heating) demand of a user, the operation of the optimal efficiency operation arrangement combination of the multiple compressors can be carried out and the optimal solution is sought according to the actual operation working conditions of the compressors, so that the cold water (heat pump) unit with the multiple compressors can be operated in the optimal energy efficiency state during load adjustment, the power consumption of the unit is saved, and the energy conservation and emission reduction of the building are realized.
When the compressor runs in the optimal efficiency interval, the compressor runs in the area with better reliability and safety, so that the method provided by the embodiment of the invention improves the stability of the unit and reduces the risk of compressor faults.
Embodiment III:
corresponding to the above method embodiment, the embodiment of the present invention provides a control device for an air conditioning unit, referring to a schematic structural diagram of a control device for an air conditioning unit shown in fig. 7, which is applied to an air conditioning unit, where the air conditioning unit includes a plurality of compressors, and the control device for an air conditioning unit includes:
a load adjustment target value determination module 71 for determining a load adjustment target value of the air conditioning unit;
a first optimal efficiency and first workload calculation module 72 for obtaining operating condition parameters of each compressor and calculating a first optimal efficiency and a first workload of each compressor based on the operating condition parameters; wherein the maximum value of the first workload characterizes the maximum refrigerating capacity or the maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes the minimum refrigerating capacity or the minimum heating capacity of the compressor under the first optimal efficiency;
a second best efficiency and second work amount calculating module 73, configured to calculate a first best efficiency and a first work amount of each compressor in a cross arrangement and combination manner, so as to obtain a second best efficiency and a second work amount of the air conditioning unit; the maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload represents the minimum refrigerating capacity or the minimum heating capacity of the air conditioning unit under the first optimal efficiency;
A target optimal efficiency and target workload calculation module 74 for determining a target optimal efficiency and target workload from a second optimal efficiency and second workload of the plurality of air conditioning units based on the load adjustment target value;
the air conditioning unit operation module 75 is configured to control the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload.
According to the control device of the air conditioning unit, provided by the embodiment of the invention, the first optimal efficiency and the first workload of each compressor are calculated based on the operation condition parameters, the first optimal efficiency and the first workload of each compressor are calculated in a cross arrangement and combination manner to obtain the second optimal efficiency and the second workload of the air conditioning unit, the target optimal efficiency and the target workload are determined from the second optimal efficiency and the second workload, and the air conditioning unit is controlled to execute refrigeration or heating operation based on the target optimal efficiency and the target workload.
In this embodiment, the cooling capacity and heating capacity to be achieved by each compressor can be well calculated and distributed, and the number of compressors to be operated can be controlled to be increased and decreased, regardless of whether the model specifications and performance characteristics of the plurality of compressors in the air conditioning unit are the same or not. And the operation of the optimal efficiency operation permutation and combination of the multiple compressors can be carried out and the optimal solution is sought according to the actual operation conditions of the compressors on the premise of meeting the requirements of the refrigerating capacity or heating capacity of users, so that the multiple air conditioning unit can operate in the optimal energy efficiency state during load adjustment, the unit power consumption is saved, and the energy conservation and emission reduction of the building are realized.
The air conditioning unit includes: a controller of an air conditioning unit, a plurality of compressors, sensors of the plurality of compressors, a controller of the plurality of compressors, and an actuator of the plurality of compressors.
The load adjustment target value determining module is used for determining the load adjustment target value of the air conditioning unit based on the change curve of the target water temperature and the current water temperature by the controller of the air conditioning unit.
The first optimal efficiency and the first working amount calculating module are used for acquiring operation condition parameters of the compressors through sensors of the compressors.
The controller of the compressor stores a performance database in advance; the performance database comprises the corresponding relation between the operation condition parameters of the compressor and the first optimal efficiency and the first workload of the compressor; the first optimal efficiency and first work amount calculation module is used for inputting the operation condition parameters into the performance database and outputting the first optimal efficiency and the first work amount of the compressor.
And the second optimal efficiency and second workload calculation module is used for the controller of the air conditioning unit to calculate the first optimal efficiency and the first workload of each compressor in a cross arrangement and combination way so as to obtain the second optimal efficiency and the second workload of the air conditioning unit.
The target optimal efficiency and target workload calculation module is used for determining a third optimal efficiency and a third workload in the second optimal efficiency and the second workload of the air conditioning unit; wherein the minimum value of the third workload is less than the load adjustment target value, and the load adjustment target value is less than the maximum value of the third workload; the maximum value of the third optimal efficiency is set as the target optimal efficiency, and the third workload corresponding to the target optimal efficiency is set as the target workload.
The maximum value of the third optimal efficiency corresponds to a plurality of third workloads; the target optimal efficiency and target work amount calculation module is used for determining the operation time of the compressor corresponding to a plurality of third works amount corresponding to the maximum value of the third optimal efficiency; and taking a third workload corresponding to the minimum value of the running time of the compressor as a target workload.
The target optimal efficiency and target work amount calculating module is used for calculating the difference value between the minimum value of each second work amount and the load adjusting target value if the third work amount does not exist; taking the second workload corresponding to the minimum value of the difference value as a target workload; and taking the second best efficiency corresponding to the target workload as the target best efficiency.
The air conditioning unit operation module is used for controlling the actuator of the compressor based on the target optimal efficiency and the target workload so as to enable each compressor to execute refrigeration or heating operation.
The air conditioning unit is a water chilling unit or a heat pump unit.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the control device of the air conditioning unit described above may refer to the corresponding process in the embodiment of the control method of the air conditioning unit described above, and will not be described herein again.
Embodiment four:
the embodiment of the invention also provides electronic equipment, which is used for running the control method of the air conditioning unit; referring to a schematic structural diagram of an electronic device shown in fig. 8, the electronic device includes a memory 100 and a processor 101, where the memory 100 is configured to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the control method of an air conditioning unit.
Further, the electronic device shown in fig. 8 further includes a bus 102 and a communication interface 103, and the processor 101, the communication interface 103, and the memory 100 are connected through the bus 102.
The memory 100 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 103 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 102 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 8, but not only one bus or type of bus.
The processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 101 or instructions in the form of software. The processor 101 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but also digital signal processors (Digital Signal Processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field-programmable gate arrays (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 100 and the processor 101 reads information in the memory 100 and in combination with its hardware performs the steps of the method of the previous embodiments.
The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions that, when being called and executed by a processor, cause the processor to implement the control method of the air conditioning unit, and the specific implementation can be referred to the method embodiment and will not be described herein.
The method, the device and the computer program product of the electronic device for controlling the air conditioning unit provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, and instructions included in the program codes can be used for executing the method in the previous method embodiment, and specific implementation can be referred to the method embodiment and will not be repeated here.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and/or apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A control method of an air conditioning unit, applied to an air conditioning unit including a plurality of compressors, the method comprising:
determining a load regulation target value of the air conditioning unit;
acquiring operation condition parameters of each compressor, and calculating first optimal efficiency and first workload of each compressor based on the operation condition parameters; wherein a maximum value of the first workload characterizes a maximum refrigeration capacity or a maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes a minimum refrigeration capacity or a minimum heating capacity of the compressor under the first optimal efficiency;
The first optimal efficiency and the first workload of each compressor are subjected to cross arrangement and combination calculation to obtain the second optimal efficiency and the second workload of the air conditioning unit; wherein the maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload represents the minimum refrigerating capacity or the minimum heating capacity of the air conditioning unit under the first optimal efficiency;
determining a target optimal efficiency and a target workload from a second optimal efficiency and a second workload of the air conditioning unit based on the load adjustment target value;
and controlling the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload.
2. The method of claim 1, wherein the air conditioning unit comprises: the controller of the air conditioning unit, the compressors, the sensors of the compressors, the controllers of the compressors and the actuators of the compressors.
3. The method of claim 2, wherein the step of determining a load adjustment target value for the air conditioning unit comprises:
And the controller of the air conditioning unit determines a load adjustment target value of the air conditioning unit based on the change curve of the target water temperature and the current water temperature.
4. The method of claim 2, wherein the step of obtaining operating condition parameters for each of said compressors comprises:
and a plurality of sensors of the compressors acquire the operation condition parameters of the compressors.
5. The method of claim 2, wherein the controller of the compressor has a performance database stored in advance; the performance database comprises the corresponding relation between the operation working condition parameters of the compressor and the first optimal efficiency and the first workload of the compressor;
a step of calculating a first optimum efficiency and a first workload of each of the compressors based on the operating condition parameters, comprising: and inputting the operation condition parameters into the performance database, and outputting the first optimal efficiency and the first workload of the compressor.
6. The method of claim 2, wherein the step of calculating a second optimal efficiency and a second workload of the air conditioning unit for each of the first optimal efficiency and first workload cross-permutation and combination of the compressors comprises:
And the controller of the air conditioning unit is used for carrying out cross arrangement and combination calculation on the first optimal efficiency and the first workload of each compressor to obtain the second optimal efficiency and the second workload of the air conditioning unit.
7. The method of claim 2, wherein determining a target optimal efficiency and target workload from a second optimal efficiency and second workload of the air conditioning unit based on the load adjustment target value comprises:
determining a third optimal efficiency and a third workload from the second optimal efficiency and the second workload of the air conditioning unit; wherein the minimum value of the third workload is less than the load adjustment target value, and the load adjustment target value is less than the maximum value of the third workload;
and taking the maximum value of the third optimal efficiency as a target optimal efficiency, and taking the third workload corresponding to the target optimal efficiency as a target workload.
8. The method of claim 7, wherein the maximum value of the third best efficiency corresponds to a plurality of third workloads; the step of taking the third workload corresponding to the target optimal efficiency as the target workload comprises the following steps:
Determining the compressor running time corresponding to a plurality of third workloads corresponding to the maximum value of the third optimal efficiency;
and taking a third workload corresponding to the minimum value of the running time of the compressor as a target workload.
9. The method of claim 7, wherein determining a target optimal efficiency and target workload from a second optimal efficiency and second workload of the air conditioning unit based on the load adjustment target value comprises:
if the third workload does not exist, calculating a difference value between the minimum value of each second workload and the load adjustment target value;
taking a second workload corresponding to the minimum value of the difference value as a target workload;
and taking the second best efficiency corresponding to the target workload as the target best efficiency.
10. The method of claim 2, wherein the step of controlling the air conditioning unit to perform a cooling or heating operation based on the target optimal efficiency and the target workload comprises:
and controlling actuators of the compressors based on the target optimal efficiency and the target workload to make each of the compressors perform a cooling or heating operation.
11. The method of claim 1, wherein the air conditioning unit is a chiller or a heat pump unit.
12. A control device of an air conditioning unit, the control device being applied to an air conditioning unit, the air conditioning unit including a plurality of compressors, the device comprising:
the load regulation target value determining module is used for determining a load regulation target value of the air conditioning unit;
the first optimal efficiency and first work load calculation module is used for obtaining operation condition parameters of each compressor and calculating first optimal efficiency and first work load of each compressor based on the operation condition parameters; wherein a maximum value of the first workload characterizes a maximum refrigeration capacity or a maximum heating capacity of the compressor under the first optimal efficiency; the minimum value of the first workload characterizes a minimum refrigeration capacity or a minimum heating capacity of the compressor under the first optimal efficiency;
the second optimal efficiency and second work load calculation module is used for carrying out cross arrangement and combination calculation on the first optimal efficiency and the first work load of each compressor to obtain the second optimal efficiency and the second work load of the air conditioning unit; wherein the maximum value of the second workload represents the maximum refrigerating capacity or the maximum heating capacity of the air conditioning unit under the second optimal efficiency; the minimum value of the second workload represents the minimum refrigerating capacity or the minimum heating capacity of the air conditioning unit under the first optimal efficiency;
A target optimal efficiency and target workload calculation module for determining a target optimal efficiency and target workload from a second optimal efficiency and second workload of the air conditioning unit based on the load adjustment target value;
and the air conditioning unit operation module is used for controlling the air conditioning unit to execute refrigeration or heating operation based on the target optimal efficiency and the target workload.
13. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of controlling an air conditioning unit of any of claims 1 to 11.
14. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement a method of controlling an air conditioning unit according to any one of claims 1 to 11.
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| CN202111453483.7A CN116202189A (en) | 2021-12-01 | 2021-12-01 | Control method and device of air conditioning unit and electronic equipment |
| PCT/CN2022/136008 WO2023098833A1 (en) | 2021-12-01 | 2022-12-01 | Method and apparatus for controlling air conditioning unit, electronic device, and readable storage medium |
| CA3219831A CA3219831A1 (en) | 2021-12-01 | 2022-12-01 | Method and apparatus for controlling air conditioning unit, electronic device, and readable storage medium |
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| CN116989430A (en) * | 2023-07-27 | 2023-11-03 | 广东德尔智慧科技股份有限公司 | Energy-saving optimization control method and system for refrigerating station |
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| JPH0510607A (en) * | 1991-06-28 | 1993-01-19 | Toshiba Corp | Air conditioner |
| CN102032647B (en) * | 2010-12-08 | 2013-10-30 | 海尔集团公司 | Magnetic suspension multi-nose central air-conditioning load distribution system and method |
| CN104990211B (en) * | 2015-06-24 | 2017-12-12 | 山东新力拓节能服务工程科技有限公司 | The control method of the centrifugal Central air-conditioning unit of multi-machine heads frequency conversion |
| GB2547806B (en) * | 2017-02-28 | 2018-02-28 | Cotopaxi Ltd | System and method for controlling compressor operating capacity of a refrigeration plant |
| CN109237709B (en) * | 2018-08-31 | 2020-12-08 | 青岛海尔空调电子有限公司 | Multi-split control method |
| CN113297812B (en) * | 2021-05-19 | 2022-07-05 | 浙江国祥股份有限公司 | Energy efficiency optimization control method for multi-handpiece variable-frequency centrifugal water chilling unit |
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| CN116989430A (en) * | 2023-07-27 | 2023-11-03 | 广东德尔智慧科技股份有限公司 | Energy-saving optimization control method and system for refrigerating station |
| CN116989430B (en) * | 2023-07-27 | 2024-05-28 | 广东德尔智慧科技股份有限公司 | Energy-saving optimization control method and system for refrigerating station |
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