CN114135988A - Control method and device of modular air conditioning system, controller and air conditioning system - Google Patents
Control method and device of modular air conditioning system, controller and air conditioning system Download PDFInfo
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
Abstract
The application relates to a control method and device of a modular air conditioning system, a controller and the air conditioning system. By the scheme, the starting and stopping states of the compressors of the system can be controlled, and the modularized installation and the modularized control of the air conditioning system with any cooling capacity can be realized after the scheme is applied, so that the modularized air conditioning system can achieve an optimal control strategy, and the air conditioning system can achieve the optimal running state under any cooling capacity load.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method and device of a modular air conditioning system, a controller and the air conditioning system.
Background
With the popularization of air conditioners, more and more air conditioners enter common families, and at present, most of the air conditioners are installed and operated in a single mode, namely, each air conditioner is controlled independently through a respective control method, and the control methods are mature and are distributed to the market. In some parts of europe, modular installation and control of air conditioners with different cooling capacities, especially small cooling capacity air conditioners (4-16 KW), according to the needs of users become a new market demand, but at present, the technology in the aspect is in the initial stage of research and development, and mature technology is not available.
Disclosure of Invention
The application provides a control method and device of a modular air conditioning system, a controller and the air conditioning system, and aims to solve the problem of control requirements for the modular air conditioning system at present.
The above object of the present application is achieved by the following technical solutions:
in a first aspect, an embodiment of the present application provides a method for controlling a modular air conditioning system, where the modular air conditioning system includes a plurality of air conditioners, each air conditioner includes at least one compressor, and the method includes:
when the modularized air-conditioning system is started for the first time, controlling one or more compressors to be started in sequence according to a preset starting sequence until the working condition requirement is met;
in the operation process of the modular air-conditioning system, according to the current working condition requirement, if the number of the compressors in the operation state is determined to be required to be adjusted, one or more compressors are controlled to be started or stopped in sequence according to a preset start-stop strategy; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
Optionally, the controlling the one or more compressors to start sequentially according to a preset sequence includes:
determining a starting time interval required for starting the next compressor according to a preset time interval determination rule;
when the running time of the recently started compressor reaches the starting time interval, judging whether a starting condition for controlling the starting of the next compressor is met;
and if the starting condition is met, controlling the next compressor to start.
Optionally, the determining, according to a preset time interval determination rule, a start time interval required for starting a next compressor includes:
if only one compressor is in the running state currently, determining the starting time interval required for starting the next compressor as ts+t1；
If at least two compressors are in the running state, determining the starting time interval required for starting the next compressor according to the following rules:
start up the
A compressor and a start-up device
The starting time interval of each compressor is ts+t2Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+t3Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+2t3The starting time interval between the starting of the other compressors and the starting of the previous compressor is ts；
Wherein n is the total number of compressors included in the modular air conditioning system and is calculated
And
time calculation result systemOne rounding up or one rounding down in unison, ts、t1、t2And t3Are all preset values.
Alternatively, it is determined whether the number of compressors in operation needs to be adjusted by the following strategy:
determining the system inlet water temperature and the water temperature drop rate of the modular air-conditioning system; the system inlet water temperature is calculated based on inlet water temperatures of all air conditioners in running states, and the water temperature drop rate is calculated based on the system inlet water temperature at the current moment and the system inlet water temperature at the previous moment;
and judging whether the number of the compressors in the running state needs to be adjusted or not based on the inlet water temperature and the temperature drop rate of the water temperature of the system.
Optionally, based on system inlet water temperature and water temperature drop rate, judge whether need to adjust the quantity of the compressor that is in running state, include:
if Tin≥Tc+T1And Δ Tt≤ΔTt1Determining that the number of compressors in the running state needs to be increased;
if Tin≥Tc+T1And Δ Tt>ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted;
if Tc+T1>Tin>Tc+T2And Δ Tt>ΔTt1Determining that the number of compressors in the operating state needs to be reduced;
if Tc+T1>Tin>Tc+T2And Δ Tt2≤ΔTt≤ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted;
if Tc+T1>Tin>Tc+T2And Δ Tt<ΔTt2Determining that the number of compressors in the running state needs to be increased;
if Tc-T3≤Tin≤Tc+T2Determining that the number of compressors in the operating state does not need to be adjusted;
if Tin<Tc-T3Determining that the number of compressors in the operating state needs to be reduced;
wherein, TinFor the system inlet water temperature, TcSet value for inlet water temperature, T1Is a preset first temperature correction value, T2Is a preset second temperature correction value, T3For a preset third temperature correction value, Δ TtIs the rate of water temperature decrease, Δ Tt1At a predetermined first temperature drop rate, Δ Tt2Is a preset second temperature drop rate.
Optionally, the controlling the one or more compressors to stop according to a preset start-stop strategy includes:
one or more compressors are sequentially controlled to be shut down every first shutdown interval or every second shutdown interval.
Optionally, if Tc-T4<Tin<Tc-T3Controlling the shutdown time interval of one or more compressors to be the first shutdown time interval if Tin≤Tc-T4Controlling the one or more compressors to be stopped for the second stop time interval; wherein the first shutdown time interval is greater than the second shutdown time interval, T4Is a preset fourth temperature correction value.
Optionally, the method further includes:
before controlling the first compressor of each air conditioner to start, controlling the fan of the corresponding air conditioner to start, and after the corresponding fan runs for a preset time, controlling the first compressor of the corresponding air conditioner to start.
Optionally, the preset starting sequence includes: and presetting the address sequence of the main board in each air conditioner.
Optionally, the method further includes:
in the operation process of the modular air conditioning system, a shutdown instruction is acquired; the shutdown instruction comprises a manual shutdown instruction and a timing shutdown instruction;
and controlling all started compressors to stop in sequence at intervals of a third stop time interval according to the shutdown instruction.
Optionally, the method further includes:
under the heating mode, if one or more air conditioners meet the defrosting condition, controlling the air conditioners meeting the defrosting condition to enter the defrosting mode; and controlling the number of the air conditioners which simultaneously enter the defrosting mode not to exceed the preset proportion of the total number of the air conditioners in heating operation.
In a second aspect, an embodiment of the present application further provides a control device for a modular air conditioning system, where the modular air conditioning system includes a plurality of air conditioners, each air conditioner includes at least one compressor, the device includes:
the first control module is used for controlling one or more compressors to be sequentially started according to a preset starting sequence until working condition requirements are met when the modular air-conditioning system is started for the first time;
the second control module is used for controlling one or more compressors to be sequentially started or stopped according to a preset start-stop strategy if the number of the compressors in the running state is determined to be required to be adjusted according to the current working condition requirement in the running process of the modular air-conditioning system; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
In a third aspect, an embodiment of the present application further provides a controller of a modular air conditioning system, including:
a memory and a processor coupled to the memory;
the memory is used for storing programs, and the programs are at least used for realizing the control method of the modular air conditioning system according to any one of the first aspect;
the processor is used for calling and executing the program stored in the memory.
In a fourth aspect, an embodiment of the present application further provides a modular air conditioning system, which includes the controller of the modular air conditioning system of the third aspect, and further includes a plurality of air conditioners that are sequentially connected to the controller of the modular air conditioning system in a communication manner in a wired or wireless manner; wherein each air conditioner includes at least one compressor.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the technical scheme, the control scheme for the modularized air-conditioning system is provided, the starting and stopping states of all compressors of the system can be controlled, and the modularized installation and the modularized control of the air-conditioning system with any cooling capacity can be realized after the scheme is applied, so that the modularized air-conditioning system can achieve an optimal control strategy, and the air-conditioning system can achieve an optimal running state under any cooling capacity load.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic diagram of a communication connection relationship of a modular air conditioning system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a water system connection of a modular air conditioning system according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a control method of a modular air conditioning system according to an embodiment of the present disclosure;
FIG. 4 is a timing diagram for controlling the sequential start of the compressors according to the embodiment of the present application;
fig. 5 is a schematic structural diagram of a control device of a modular air conditioning system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a controller of a modular air conditioning system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In order to better realize the application of the modular air conditioning system, the application provides a control method and related devices, equipment and the air conditioning system applying the control method, so as to ensure that the air conditioning system can reach the optimal running state under any cooling capacity load. Specific embodiments are described in detail below by way of examples.
Examples
Before describing the control method of the present application in detail, the structure and principle of a related modular air conditioning system to which the control method can be applied will be described first.
Referring to fig. 1-2, fig. 1 is a schematic diagram of a communication connection relationship of a modular air conditioning system according to an embodiment of the present disclosure, and fig. 2 is a schematic diagram of a connection relationship of a water system of a modular air conditioning system according to an embodiment of the present disclosure.
As shown in fig. 1, the modular air conditioning system includes 16 modules (module 1 to module 16) that are sequentially connected in a communication manner and are finally connected to an integrated controller, where each module represents a modular air conditioner (hereinafter, referred to as "air conditioner" for short, and refers to components such as an air conditioner external unit including a refrigeration unit), each air conditioner includes a control motherboard, and the control motherboard is configured to collect operation parameters of the corresponding air conditioner, such as temperature parameters collected by temperature sensors at various locations, pressure parameters collected by pressure sensors at various locations, and the like, and then send the collected parameters to the integrated controller through the communication module, and finally the integrated controller executes the control method described in the subsequent embodiment of the present application, so as to implement centralized control on each module. In addition, in practical application, the centralized controller can be connected with one control screen, so that a user can simultaneously check the operating parameters of each air conditioner through the control screen and issue control instructions to each air conditioner.
The communication connection method of the plurality of modules (air conditioners) comprises but is not limited to wired connection, such as RS485 industrial bus connection, wireless WIFI connection and the like. In addition, it should be noted that, in practical application, the number of the air conditioners included in the modular air conditioning system is not limited to 16, but may be reasonably set according to the cooling capacity of each air conditioner and the total cooling capacity required by the user, and the connection relationship and the control method are consistent with those of the provided drawings in principle.
As shown in fig. 2, a plurality of water systems of the air conditioner are connected in parallel to the main system to jointly implement cooling/heating operation. It should be noted that fig. 2 only shows two air conditioners, but when an actual modular air conditioning system includes more air conditioners (for example, 16 modules in fig. 1), only the expansion is needed directly on the basis of fig. 2.
Based on the above system, in summary, from the control system, a plurality of modular air conditioners are combined together through a water system and communication control, but in the actual control method, the modular air conditioners are not distinguished, the compressors in the modular air conditioners are numbered according to a specific rule, and then the compressors are started or stopped according to the operation parameters of the whole system, so that the cooling or heating purpose is finally and reasonably realized.
Specific control method referring to fig. 3, fig. 3 is a schematic flow chart of a control method of a modular air conditioning system according to an embodiment of the present disclosure. The control method may be applied to the systems shown in fig. 1-2 and may be performed by the centralized controller shown in fig. 1.
As shown in fig. 3, the control method at least includes the following steps:
s101: when the modularized air-conditioning system is started for the first time, controlling one or more compressors to be started in sequence according to a preset starting sequence until the working condition requirement is met;
specifically, when the modular air conditioning system is started for the first time, the modular air conditioning system firstly starts components such as a water pump and a fan according to requirements, and then starts the compressor. When the compressor is started, only one compressor is started at a time, the centralized controller continuously acquires the operation parameters of each operating air conditioner, whether more compressors need to be started or not is judged according to the current working condition requirement (such as the cold quantity requirement), if not, the current state is maintained, and the working condition requirement is achieved at the moment. The initial startup of the modular air conditioning system comprises the following conditions: 1. starting up for the first time after power on; 2. the air conditioner is started for the first time after all the air conditioner units are stopped, wherein the stopping comprises stopping at a temperature point, fault stopping, manual stopping and the like.
It should be noted that, in practical applications, each air conditioner includes at least one compressor (i.e. one, two or more, but three or more are rare cases), and the number of the compressors does not substantially affect the control method of the present embodiment.
S102: in the operation process of the modular air-conditioning system, according to the current working condition requirement, if the number of the compressors in the operation state is determined to be required to be adjusted, one or more compressors are controlled to be started or stopped in sequence according to a preset start-stop strategy; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
Specifically, in the operation process of the modular air-conditioning system, the operating condition requirements may change continuously, so that the current operating condition requirements of the modular air-conditioning system need to be determined in real time or at regular time, and whether the number of the compressors in the operating state needs to be adjusted is judged, and if so, one or more compressors are controlled to start or stop according to a preset start-stop strategy (i.e., a principle strategy of "start-first-stop first, stop-first-start"). The principle strategy of 'stop before start, stop before start' is used for avoiding the conditions that the running time of some compressors is long and the running time of some compressors is short, so that the running time of the compressors in the whole system is relatively small, the running reliability of the compressors is improved, and the service life of the compressors is prolonged.
By the control scheme, the starting and stopping states of all the compressors of the system can be controlled, and the modularized installation and the modularized control of the air conditioning system with any cooling capacity can be realized after the scheme is applied, so that the modularized air conditioning system achieves an optimal control strategy, and the air conditioning system can achieve the optimal running state under any cooling capacity load.
In some embodiments, when the step S101 controls the one or more compressors to start sequentially according to a preset sequence, the specific process includes: determining a starting time interval required for starting the next compressor according to a preset time interval determination rule; when the running time of the recently started compressor reaches the starting time interval, judging whether a starting condition for controlling the starting of the next compressor is met; and if the starting condition is met, controlling the next compressor to start.
Specifically, in the above embodiment, when one or more compressors need to be controlled to start in sequence, since the system operation parameter changes after each compressor is started, and the change process is not completed instantly, in order to ensure that the system reaches a stable operation state, a certain time (i.e. the start time interval) needs to be waited before the next compressor is controlled to start, so as to stabilize the system.
When the starting time interval required for starting the next compressor is determined according to the preset time interval determination rule in the above steps, in a specific implementation, for example, a preset value may be directly adopted as the starting time interval for each compressor.
However, considering that the number of compressors usually included in the modular air conditioning system is large, when the preset value is directly adopted as the starting time interval, too many compressors continuously started in a short time may be caused, so that the system operation parameter changes too fast, and further frequent start and stop are caused. Therefore, in some embodiments of the present application, the following scheme is provided for determining the start time interval:
firstly, if only one compressor is in operation state currently, the starting time interval required for starting the next compressor is determined as ts+t1；
If at least two compressors are in the running state, determining the starting time interval required for starting the next compressor according to the following rules:
start up the
A compressor and a start-up device
The starting time interval of each compressor is ts+t2Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+t3Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+2t3The starting time interval between the starting of the other compressors and the starting of the previous compressor is ts；
Wherein n is the total number of compressors included in the modular air conditioning system and is calculated
And
unified upward rounding or unified downward rounding of time calculation results, ts、t1、t2And t3Are all preset values.
Specifically, after the system is started, if only one compressor is currently in the operating state, the compressor is usually relied on only to provide insufficient cooling capacity, so that the preset time interval t is directly used in the embodiments+t1As a corresponding start-up time interval. When at least two compressors are in operation state, the system is startedAnd controlling the starting of the compressors according to the rule of the second condition.
To facilitate a more intuitive understanding, let n be 19, ts＝1，t1＝2，t2＝1，t3A timing chart for controlling the start of the n compressors is shown in fig. 4 (calculation) when the time unit is min 2 (in all the time units)
And
the calculation results are rounded up).
Of course, it should be understood that, in a specific application, the values specifically adopted by the parameters can be appropriately adjusted, and only the basic principle is needed to be followed: from the general trend, the time interval for starting the next compressor is longer and longer each time a certain number of compressors are started.
When the running time of the recently started compressor reaches the starting time interval determined in the previous step, whether more compressors need to be started is judged according to the current working condition requirement, namely whether the starting condition for controlling the starting of the next compressor is met, if the starting condition is met, the next compressor is controlled to be started, and then the previous steps are repeatedly executed until the working condition requirement is met. If the starting condition is judged not to be met, the working condition requirement is met, so that more compressors are not started any more, and the number of the currently operated compressors is kept unchanged.
On the basis of the above solutions, in order to better control the modular air conditioning system, the present application further provides further specific implementation solutions or improvements through the following embodiments.
In some embodiments, in step S102, it is determined whether the number of the compressors in the operating state needs to be adjusted by the following strategy:
determining the system inlet water temperature and the water temperature drop rate of the modular air-conditioning system; the system inlet water temperature is calculated based on inlet water temperatures of all air conditioners in running states, and the water temperature drop rate is calculated based on the system inlet water temperature at the current moment and the system inlet water temperature at the previous moment;
and judging whether the number of the compressors in the running state needs to be adjusted or not based on the inlet water temperature and the temperature drop rate of the water temperature of the system.
Specifically, the system inlet water temperature of the modular air conditioning system can represent whether the current cold quantity is sufficient or not, and the water temperature drop rate can represent the change trend and the change speed of the current cold quantity, so that whether the number of the compressors in the running state needs to be adjusted or not can be judged through the system inlet water temperature and the water temperature drop rate.
In addition, in practical applications, the specific process of determining the system inlet water temperature of the modular air conditioning system may include: if the number of the air conditioners in the running state is 1, taking the water inlet temperature of the corresponding air conditioner as the water inlet temperature of the system; if the number of the air conditioners in the running state is 2, taking the average value of the inlet water temperatures of the corresponding air conditioners as the inlet water temperature of the system; and if the number of the air conditioners in the running state is at least 3, acquiring the inlet water temperature of each air conditioner in the running state, removing the highest temperature and the lowest temperature, and taking the average value of all the residual values as the inlet water temperature of the system.
Further, one possible implementation of determining a control strategy for a compressor based on the system inlet water temperature and the water temperature drop rate may include:
1) if Tin≥Tc+T1And Δ Tt≤ΔTt1Determining that the number of compressors in the running state needs to be increased; when the conditions are met, the system shows that the inlet water temperature is overhigh and the temperature drop rate of the water temperature is small at the moment, so that more compressors are controlled to start to provide more cold energy;
2) if Tin≥Tc+T1And Δ Tt>ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted; when the above conditions are met, the system is indicated that the inlet water temperature is overhigh but the water temperature drop rate is larger at the momentAfter a period of time, the system inlet water temperature can be reduced to a reasonable range, so that the number of started compressors is kept unchanged;
3) if Tc+T1>Tin>Tc+T2And Δ Tt>ΔTt1Determining that the number of compressors in the operating state needs to be reduced; when the conditions are met, the system water inlet temperature is higher but the water temperature drop rate is higher, and after a period of time, the system water inlet temperature can be reduced to exceed a reasonable range, so that a certain number of compressors are controlled to be stopped in sequence to reduce the cold quantity; wherein, the time interval of the shutdown can adopt a set value, such as 5 min;
4) if Tc+T1>Tin>Tc+T2And Δ Tt2≤ΔTt≤ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted; when the conditions are met, the system water inlet temperature is higher and the water temperature drop rate is lower, so that the system water inlet temperature can be reduced to a reasonable range, and the number of started compressors is kept unchanged;
5) if Tc+T1>Tin>Tc+T2And Δ Tt<ΔTt2Determining that the number of compressors in the running state needs to be increased; when the conditions are met, the system water inlet temperature is higher and the water temperature drop rate is too low, and the system water inlet temperature can be increased to exceed a reasonable range after a period of time, so that more compressors are controlled to be started to provide more cold energy;
6) if Tc-T3≤Tin≤Tc+T2Determining that the number of compressors in the operating state does not need to be adjusted; when the conditions are met, the system water inlet temperature is reasonable, so that the number of started compressors is kept unchanged;
7) if Tin<Tc-T3Determining that the number of compressors in the operating state needs to be reduced; when the above conditions are met, the system water inlet temperature is low, so that a certain amount of pressure is controlledThe compressor is stopped to reduce the cold quantity;
wherein, TinFor the system inlet water temperature, TcSet value for inlet water temperature, T1Is a preset first temperature correction value (default is 4 ℃, and can be adjusted according to requirements), T2Is a preset second temperature correction value (default is 1 ℃, and can be adjusted according to requirements), T3Δ T is a preset third temperature correction value (default 1 ℃, can be adjusted according to requirements), andtis the rate of water temperature decrease, Δ Tt1At a first predetermined temperature drop rate (default of 0.5 ℃/min, adjustable as required), Δ Tt2At a preset second rate of temperature drop (default to 0.4 Δ T)t1I.e., 0.2 ℃/min, can be adjusted as desired).
Based on the above solution, in some embodiments, in step S102, controlling the one or more compressors to stop according to a preset start-stop strategy includes: one or more compressors are sequentially controlled to be shut down every first shutdown interval or every second shutdown interval.
That is, when the compressors are controlled to be sequentially stopped, the compressors may be controlled to be sequentially stopped at preset stop time intervals (first stop time intervals or second stop time intervals).
For example, if Tc-T4<Tin<Tc-T3Controlling the shutdown time interval of one or more compressors to be the first shutdown time interval if Tin≤Tc-T4Controlling the one or more compressors to be stopped for the second stop time interval; wherein the first shutdown time interval is greater than the second shutdown time interval, T4Is a preset fourth temperature correction value. Wherein, when Tc-T4<Tin<Tc-T3When the temperature of the inlet water of the system is too low and still in a reasonable range which can be borne by the system, the time interval of the shutdown adopts a larger first shutdown time interval (such as 5min), and when T isin≤Tc-T4The time shows that the temperature of the inlet water of the system is too low and exceeds the reasonable range which can be borne by the systemIn order to protect the system, the time interval of the shutdown is therefore a second, smaller shutdown time interval (e.g. 2min), enabling a fast emergency shutdown.
In addition, when specifically implemented, the method further includes: before controlling the first compressor of each air conditioner to start, controlling the fan of the corresponding air conditioner to start, and after the corresponding fan runs for a preset time, controlling the first compressor of the corresponding air conditioner to start.
That is, before the first compressor of each air conditioner is controlled to be started, it is required to ensure that the fan belonging to the same air conditioner is started first and operates for a preset time (for example, 45s) to meet the starting requirement of the compressor. And wherein the start-up sequence of the fan and the compressor satisfies the following rules: when the starting time of the compressor A is reached, if the starting condition of the fan is met, the fan is started firstly, and the compressor A is started after the fan runs for a preset time, which is equivalent to delaying the starting time of the compressor A for the preset time.
In some embodiments, in step S101, when controlling the one or more compressors to start sequentially, the corresponding preset start sequence may be, for example, according to a sequence from the module 1 to the module 16, and in a specific implementation, the control motherboard (motherboard for short) included in each module is preset with different addresses for communicating with the centralized controller, so that the preset start sequence may be a preset address sequence of the motherboard in each air conditioner.
The above control method for controlling the sequential stop of the compressors is substantially an automatic control logic of the system itself. In addition, some embodiments of the present application further provide a shutdown control method related to user intervention, where in this embodiment, the method further includes: in the operation process of the modular air conditioning system, a shutdown instruction is acquired; the shutdown instruction comprises a manual shutdown instruction and a timing shutdown instruction; and controlling all started compressors to stop in sequence at intervals of a third stop time interval according to the shutdown instruction.
That is, in this embodiment, the centralized controller may further control all started compressors to stop in sequence according to a manual shutdown instruction and a timing shutdown instruction triggered by a user, and in a specific implementation, since the compressor is stopped triggered by the user, it is equivalent to that the user does not need to continue to use the modular air conditioning system at this time, therefore, a third shutdown time interval during which the compressors are stopped in sequence may be smaller than the first shutdown time interval (e.g., 5min) and the second shutdown time interval (e.g., 2min), for example, may be 10s, so as to implement a rapid shutdown of the entire system.
In addition, after the user manually shuts down or shuts down at regular time, if the whole system is not powered off (the previous running state can be memorized), when the system is restarted, the starting sequence of the compressors can be directly according to the starting sequence before shutdown, so that the judging and calculating processes are reduced.
In addition, it should be noted that when the compressors are sequentially controlled to start according to a preset start sequence or when the compressors are controlled to start according to a preset start-stop strategy, if an air conditioner corresponding to the next compressor to be started fails or triggers protection, the compressor to be started is skipped over, and the following compressors are started in sequence. And when the compressor is started again after the fault or protection is recovered, the compressor which has the fault or protects the corresponding air conditioner before is preferentially started. Among them, air conditioner faults and protection include but are not limited to: high voltage protection, low voltage protection, compressor overload protection (the internal protection of the compressor and the external overcurrent protection are connected in series), phase sequence protection, fan overload protection, exhaust high temperature protection, various temperature sensing package faults, anti-freezing protection, anti-overheating protection, water flow switch protection and the like.
In addition, in some embodiments, the method further comprises: under the heating mode, if one or more air conditioners meet the defrosting condition, controlling the air conditioners meeting the defrosting condition to enter the defrosting mode; and controlling the number of the air conditioners which simultaneously enter the defrosting mode not to exceed the preset proportion of the total number of the air conditioners in heating operation.
Specifically, when a plurality of (for example, 16) air conditioners are combined into an integral system to operate in heating, because each air conditioner is not simultaneously started, the frosting conditions of evaporators of the air conditioners are different, and a plurality of air conditioners can simultaneously meet the defrosting condition. The purpose is to ensure the safe and reliable operation of the system, and the reason is as follows: when the air conditioner is defrosted, the refrigerating operation is equivalently changed, so if too many air conditioning units are defrosted simultaneously, the temperature of the system water is reduced to be too low, the water way is possibly frozen, and the system is further abnormal.
The preset ratio may be 1/3, for example. For example: if 15 air conditioners in the system are in heating operation and 8 air conditioners reach defrosting conditions, the number of the air conditioners entering defrosting at the same time is less than or equal to 15/3 and is 5, and the rest 3 air conditioners need to enter defrosting after the first 5 air conditioners finish defrosting.
In addition, based on the same inventive concept, the embodiment of the present application further provides a control device of the modular air conditioning system, corresponding to the control method of the modular air conditioning system described in the above embodiment. The device is a software and/or hardware-based functional module for implementing the control method of the modular air conditioning system of the above embodiment.
As shown in fig. 5, the control device includes:
the first control module 51 is used for controlling one or more compressors to be sequentially started according to a preset starting sequence when the modular air-conditioning system is started for the first time until the working condition requirement is met;
the second control module 51 is configured to, during an operation process of the modular air conditioning system, control one or more compressors to be sequentially started or stopped according to a preset start-stop strategy if it is determined that the number of the compressors in an operation state needs to be adjusted according to a current working condition requirement; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
Optionally, when the first control module 51 controls the one or more compressors to start sequentially according to a preset sequence, the first control module is specifically configured to:
determining a starting time interval required for starting the next compressor according to a preset time interval determination rule;
when the running time of the recently started compressor reaches the starting time interval, judging whether a starting condition for controlling the starting of the next compressor is met;
and if the starting condition is met, controlling the next compressor to start.
Optionally, when determining the start time interval required for starting the next compressor according to the preset time interval determination rule, the first control module 51 is specifically configured to:
if only one compressor is in the running state currently, determining the starting time interval required for starting the next compressor as ts+t1；
If at least two compressors are in the running state, determining the starting time interval required for starting the next compressor according to the following rules:
start up the
A compressor and a start-up device
The starting time interval of each compressor is ts+t2Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+t3Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+2t3The starting time interval between the starting of the other compressors and the starting of the previous compressor is ts；
Wherein n is a modular air conditionerThe total number of compressors included in the system, and calculating
And
unified upward rounding or unified downward rounding of time calculation results, ts、t1、t2And t3Are all preset values.
Alternatively, the second control module 52 determines whether the number of compressors in operation needs to be adjusted by:
determining the system inlet water temperature and the water temperature drop rate of the modular air-conditioning system; the system inlet water temperature is calculated based on inlet water temperatures of all air conditioners in running states, and the water temperature drop rate is calculated based on the system inlet water temperature at the current moment and the system inlet water temperature at the previous moment;
and judging whether the number of the compressors in the running state needs to be adjusted or not based on the inlet water temperature and the temperature drop rate of the water temperature of the system.
Optionally, the second control module 52 is specifically configured to, when determining whether the number of the compressors in the running state needs to be adjusted based on the system inlet water temperature and the water temperature drop rate:
if Tin≥Tc+T1And Δ Tt≤ΔTt1Determining a control strategy for the compressors to control one or more compressors to start in sequence;
if Tin≥Tc+T1And Δ Tt>ΔTt1Determining that the control strategy for the compressors is to maintain the number of started compressors unchanged;
if Tc+T1>Tin>Tc+T2And Δ Tt>ΔTt1Determining a control strategy for the compressors to control one or more compressors to be stopped in sequence;
if Tc+T1>Tin>Tc+T2And Δ Tt2≤ΔTt≤ΔTt1Determining that the control strategy for the compressors is to maintain the number of started compressors unchanged;
if Tc+T1>Tin>Tc+T2And Δ Tt<ΔTt2Determining a control strategy for the compressors to control one or more compressors to start in sequence;
if Tc-T3≤Tin≤Tc+T2Determining that the control strategy for the compressors is to maintain the number of started compressors unchanged;
if Tin<Tc-T3Determining a control strategy for the compressors to control one or more compressors to be stopped in sequence;
wherein, TinFor the system inlet water temperature, TcSet value for inlet water temperature, T1Is a preset first temperature correction value, T2Is a preset second temperature correction value, T3For a preset third temperature correction value, Δ TtIs the rate of water temperature decrease, Δ Tt1At a predetermined first temperature drop rate, Δ Tt2Is a preset second temperature drop rate.
Optionally, when the second control module 52 controls the one or more compressors to stop according to the preset start-stop strategy, the second control module is specifically configured to:
one or more compressors are sequentially controlled to be shut down every first shutdown interval or every second shutdown interval.
Optionally, if Tc-T4<Tin<Tc-T3Controlling the shutdown time interval of one or more compressors to be the first shutdown time interval if Tin≤Tc-T4Controlling the one or more compressors to be stopped for the second stop time interval; wherein the first shutdown time interval is greater than the second shutdown time interval, T4Is a preset fourth temperature correction value.
Optionally, the first control module 51 is further configured to:
before controlling the first compressor of each air conditioner to start, controlling the fan of the corresponding air conditioner to start, and after the corresponding fan runs for a preset time, controlling the first compressor of the corresponding air conditioner to start.
Optionally, the first control module 51 or the second control module 52 is further configured to:
obtaining a shutdown instruction; the shutdown instruction comprises a manual shutdown instruction and a timing shutdown instruction;
and controlling all started compressors to stop in sequence at intervals of a third stop time interval according to the shutdown instruction.
Optionally, the first control module 51 or the second control module 52 is further configured to:
under the heating mode, if one or more air conditioners meet the defrosting condition, controlling the air conditioners meeting the defrosting condition to enter the defrosting mode; and controlling the number of the air conditioners which simultaneously enter the defrosting mode not to exceed the preset proportion of the total number of the air conditioners in heating operation.
The specific implementation manner of each step implemented by each functional module may refer to the corresponding content of the foregoing method embodiment, and is not described in detail here.
In addition, based on the same inventive concept, the embodiment of the present application further provides a controller of a modular air conditioning system, corresponding to the control method of the modular air conditioning system described in the above embodiment. This controller is the centralized controller shown in fig. 1.
As shown in fig. 6, a controller of a modular air conditioning system includes:
a memory 61 and a processor 62 connected to the memory 61;
a memory 61 for storing a program for implementing at least the method of controlling the modular air conditioning system of any of the preceding method embodiments;
and a processor 62 for calling and executing the program stored in the memory 61.
The specific implementation manner of each step implemented by the above procedure may refer to the corresponding content of the foregoing method embodiment, and is not described in detail here. And after the controller is applied to the modularized air-conditioning system, a corresponding control scheme can be realized.
By the control scheme, the starting and stopping states of all the compressors of the system can be controlled, and the modularized installation and the modularized control of the air conditioning system with any cooling capacity can be realized after the scheme is applied, so that the modularized air conditioning system achieves an optimal control strategy, and the air conditioning system can achieve the optimal running state under any cooling capacity load.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (14)
1. A method of controlling a modular air conditioning system, the modular air conditioning system including a plurality of air conditioners, each air conditioner including at least one compressor, the method comprising:
when the modularized air-conditioning system is started for the first time, controlling one or more compressors to be started in sequence according to a preset starting sequence until the working condition requirement is met;
in the operation process of the modular air-conditioning system, according to the current working condition requirement, if the number of the compressors in the operation state is determined to be required to be adjusted, one or more compressors are controlled to be started or stopped in sequence according to a preset start-stop strategy; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
2. The method of claim 1, wherein controlling the one or more compressors to start sequentially in a predetermined sequence comprises:
determining a starting time interval required for starting the next compressor according to a preset time interval determination rule;
when the running time of the recently started compressor reaches the starting time interval, judging whether a starting condition for controlling the starting of the next compressor is met;
and if the starting condition is met, controlling the next compressor to start.
3. The method of claim 2, wherein determining a starting time interval required for starting the next compressor according to a preset time interval determination rule comprises:
if only one compressor is in the running state currently, determining the starting time interval required for starting the next compressor as ts+t1；
If at least two compressors are in the running state, determining the starting time interval required for starting the next compressor according to the following rules:
start up the
A compressor and a start-up device
The starting time interval of each compressor is ts+t2Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+t3Start up of
A compressor and a start-up device
The starting time interval of each compressor is ts+t2+2t3The starting time interval between the starting of the other compressors and the starting of the previous compressor is ts；
Wherein n is the total number of compressors included in the modular air conditioning system and is calculated
And
unified upward rounding or unified downward rounding of time calculation results, ts、t1、t2And t3Are all preset values.
4. Method according to claim 1, characterized in that it is determined whether the number of compressors in operation needs to be adjusted by the following strategy:
determining the system inlet water temperature and the water temperature drop rate of the modular air-conditioning system; the system inlet water temperature is calculated based on inlet water temperatures of all air conditioners in running states, and the water temperature drop rate is calculated based on the system inlet water temperature at the current moment and the system inlet water temperature at the previous moment;
and judging whether the number of the compressors in the running state needs to be adjusted or not based on the inlet water temperature and the temperature drop rate of the water temperature of the system.
5. The method of claim 4, wherein determining whether an adjustment to the number of compressors in operation is required based on the system inlet water temperature and the rate of water temperature drop comprises:
if Tin≥Tc+T1And Δ Tt≤ΔTt1Determining that the number of compressors in the running state needs to be increased;
if Tin≥Tc+T1And Δ Tt>ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted;
if Tc+T1>Tin>Tc+T2And Δ Tt>ΔTt1Determining that the number of compressors in the operating state needs to be reduced;
if Tc+T1>Tin>Tc+T2And Δ Tt2≤ΔTt≤ΔTt1Determining that the number of compressors in the operating state does not need to be adjusted;
if Tc+T1>Tin>Tc+T2And Δ Tt<ΔTt2Determining that the number of compressors in the running state needs to be increased;
if Tc-T3≤Tin≤Tc+T2Determining that the number of compressors in the operating state does not need to be adjusted;
if Tin<Tc-T3Then, thenDetermining that a reduction in the number of compressors in operation is required;
wherein, TinFor the system inlet water temperature, TcSet value for inlet water temperature, T1Is a preset first temperature correction value, T2Is a preset second temperature correction value, T3For a preset third temperature correction value, Δ TtIs the rate of water temperature decrease, Δ Tt1At a predetermined first temperature drop rate, Δ Tt2Is a preset second temperature drop rate.
6. The method of claim 5, wherein controlling the one or more compressors to shutdown according to a predetermined start-stop strategy comprises:
one or more compressors are sequentially controlled to be shut down every first shutdown interval or every second shutdown interval.
7. The method of claim 6, wherein if T is greater than Tc-T4<Tin<Tc-T3Controlling the shutdown time interval of one or more compressors to be the first shutdown time interval if Tin≤Tc-T4Controlling the one or more compressors to be stopped for the second stop time interval; wherein the first shutdown time interval is greater than the second shutdown time interval, T4Is a preset fourth temperature correction value.
8. The method of claim 1, further comprising:
before controlling the first compressor of each air conditioner to start, controlling the fan of the corresponding air conditioner to start, and after the corresponding fan runs for a preset time, controlling the first compressor of the corresponding air conditioner to start.
9. The method of claim 1, wherein the preset boot sequence comprises: and presetting the address sequence of the main board in each air conditioner.
10. The method of claim 1, further comprising:
in the operation process of the modular air conditioning system, a shutdown instruction is acquired; the shutdown instruction comprises a manual shutdown instruction and a timing shutdown instruction;
and controlling all started compressors to stop in sequence at intervals of a third stop time interval according to the shutdown instruction.
11. The method of claim 1, further comprising:
under the heating mode, if one or more air conditioners meet the defrosting condition, controlling the air conditioners meeting the defrosting condition to enter the defrosting mode; and controlling the number of the air conditioners which simultaneously enter the defrosting mode not to exceed the preset proportion of the total number of the air conditioners in heating operation.
12. A control apparatus for a modular air conditioning system, the modular air conditioning system including a plurality of air conditioners, each air conditioner including at least one compressor, the apparatus comprising:
the first control module is used for controlling one or more compressors to be sequentially started according to a preset starting sequence until working condition requirements are met when the modular air-conditioning system is started for the first time;
the second control module is used for controlling one or more compressors to be sequentially started or stopped according to a preset start-stop strategy if the number of the compressors in the running state is determined to be required to be adjusted according to the current working condition requirement in the running process of the modular air-conditioning system; wherein, the preset start-stop strategy comprises: the first stopped compressor is started first and the first started compressor is stopped first.
13. A controller for a modular air conditioning system, comprising:
a memory and a processor coupled to the memory;
the memory for storing a program for implementing at least a control method of the modular air conditioning system according to any one of claims 1 to 11;
the processor is used for calling and executing the program stored in the memory.
14. A modular air conditioning system comprising the controller of the modular air conditioning system of claim 13, further comprising a plurality of air conditioners communicatively connected in sequence to the controller of the modular air conditioning system by wire or wirelessly; wherein each air conditioner includes at least one compressor.
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| CN202111345688.3A CN114135988A (en) | 2021-11-15 | 2021-11-15 | Control method and device of modular air conditioning system, controller and air conditioning system |
| PCT/CN2022/107939 WO2023082707A1 (en) | 2021-11-15 | 2022-07-26 | Modular air conditioning system control method and apparatus, controller, and air conditioning system |
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| WO2023082707A1 (en) * | 2021-11-15 | 2023-05-19 | 珠海格力电器股份有限公司 | Modular air conditioning system control method and apparatus, controller, and air conditioning system |
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| CN112254308B (en) * | 2020-10-22 | 2021-08-20 | 珠海格力电器股份有限公司 | Modularized air conditioning unit and compressor control method thereof |
| CN114135988A (en) * | 2021-11-15 | 2022-03-04 | 珠海格力电器股份有限公司 | Control method and device of modular air conditioning system, controller and air conditioning system |
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| JP2004101012A (en) * | 2002-09-06 | 2004-04-02 | Fujitsu General Ltd | Control method for multiple chamber type air conditioner |
| CN1952511A (en) * | 2005-10-21 | 2007-04-25 | 三星电子株式会社 | Control method of multi type air conditioner |
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