CN107202409A - Air-conditioning system and its control method and device - Google Patents
Air-conditioning system and its control method and device Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 65
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Abstract
The invention discloses a kind of air-conditioning system and its control method and device, the air-conditioning system includes N number of unit subsystem in parallel, and each unit subsystem is made up of at least one units connected in series, the described method comprises the following steps：The target temperature value of user's setting is obtained, and obtains total leaving water temperature of N number of unit subsystem in parallel；The target temperature value and total leaving water temperature set according to user carries out start-up and shut-down control to each unit in N number of unit subsystem in parallel；After the completion of start-up and shut-down control is carried out, the target temperature value of each unit in starting state and control temperature in N number of unit subsystem in parallel are obtained, so that each unit in starting state is carried out plus Unloading Control according to corresponding target temperature value and control temperature.Thus, each unit is controlled using one-level control mode so that data processing becomes simplified as, is advantageously implemented the compatible extensions of unit, and suitable for series, parallel or connection in series-parallel unit, highly versatile.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method for controlling an air conditioning system, a computer-readable storage medium, a control device for an air conditioning system, and an air conditioning system having the control device.
Background
At present, the application of the combined control of the modular units is very common, mainly because the modular splicing mode is combined flexibly, the refrigerating capacity can be controlled flexibly through a host (namely, the refrigerating capacity is reasonably distributed according to the load requirement of each unit), and the installation position of each unit can be more flexible. Generally, the modular units are spliced in parallel, but many old systems are updated, or the unit installation position is limited by the arrangement position of a water system, and the requirements can be met only by a series connection and parallel connection mode.
In the related art, a superimposed control mode of a first-stage parallel connection and a second-stage series connection is adopted, although the mode can meet the requirement, the control mode is relatively complex, and two-stage control exists, for example, a master machine of the second-stage series connection control may be a slave machine of the first-stage parallel connection control, and a master machine of the first-stage parallel connection control may also be a master machine of the second-stage series connection control, so that the processing and conversion of data are complicated, and the compatible expansion is not facilitated.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a control method for an air conditioning system, which controls each unit in a primary control manner, so that data processing is simplified, and compatible expansion of the units is facilitated.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to provide a control device for an air conditioning system.
A fourth object of the present invention is to provide an air conditioning system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for an air conditioning system, where the air conditioning system includes N parallel unit subsystems, where each unit subsystem is formed by at least one unit connected in series, and the method includes the following steps: acquiring a target temperature value set by a user, and acquiring the total outlet water temperature of the N parallel unit subsystems; performing start-stop control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature; and after the start-stop control of each unit in the N parallel unit subsystems is finished, acquiring a target temperature value and a control temperature of each unit in a starting state in the N parallel unit subsystems so as to enable each unit in the starting state to carry out loading and unloading control according to the corresponding target temperature value and the control temperature.
According to the control method of the air conditioning system, the target temperature value set by a user is obtained, the total outlet water temperature of the N parallel unit subsystems is obtained, then start-stop control is carried out on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and after the start-stop control of each unit in the N parallel unit subsystems is completed, the target temperature value and the control temperature of each unit in a starting state in the N parallel unit subsystems are obtained, so that each unit in the starting state can carry out loading and unloading control according to the corresponding target temperature value and the control temperature. Therefore, each unit is controlled by adopting a one-level control mode, so that data processing becomes simple, compatible expansion of the units is facilitated, the method is suitable for series, parallel or series-parallel units, and the universality is high.
According to one embodiment of the invention, when each unit in the N parallel unit subsystems is started and controlled according to the target temperature value set by the user and the total outlet water temperature, the unit in a shutdown state in the unit subsystem corresponding to the unit in a starting state is controlled to start, and after all the units in the unit subsystems are in the starting state, other unit subsystems are controlled to start; or, the machine set subsystem in the shutdown state of each machine set in the N parallel machine set subsystems is controlled to start first until each machine set subsystem in the N parallel machine set subsystems has a machine set start, and then the machine set in the shutdown state in the N parallel machine set subsystems is controlled to start.
According to one embodiment of the invention, when the shutdown control is performed on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, the unit in the unit subsystems, the number of which is greater than 1, in the N parallel unit subsystems is controlled to be shutdown, one unit in each unit subsystem in the N parallel unit subsystems is enabled to be in the enabled state, and then the N parallel unit subsystems are controlled to be shutdown; or firstly controlling the unit in the unit subsystem corresponding to the unit in the shutdown state to be shut down, and then controlling other unit subsystems to be shut down after all the units in the unit subsystem are shut down.
According to an embodiment of the present invention, the obtaining a target temperature value and a control temperature of each unit in a start state in the N parallel unit subsystems includes: acquiring the outlet water temperature of each unit in the N parallel unit subsystems, taking the minimum value of the outlet water temperature in each unit subsystem as the control temperature of each unit in an open state in the unit subsystem, and taking the target temperature value set by the user as the target temperature value of each unit in the open state; or acquiring the target temperature value of each set in the starting state according to the target temperature value set by the user and the outlet water temperature of each set in the starting state, and taking the outlet water temperature of each set in the starting state as the respective control temperature.
According to an embodiment of the present invention, the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature includes: if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control; and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
To achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium having instructions stored therein, which when executed perform the control method of the air conditioning system described above.
The computer-readable storage medium of the embodiment of the invention controls each unit by executing the control method of the air conditioning system and adopting a primary control mode, so that the data processing is simplified, the compatible expansion of the units is favorably realized, and the computer-readable storage medium is suitable for series, parallel or series-parallel units and has strong universality.
In order to achieve the above object, a third aspect of the present invention provides a control device for an air conditioning system, the air conditioning system including N parallel unit subsystems, wherein each unit subsystem is formed by at least one unit connected in series, the device including: the acquisition module is used for acquiring a target temperature value set by a user and acquiring the total outlet water temperature of the N parallel unit subsystems; and the control module is used for performing start-stop control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and acquiring the target temperature value and the control temperature of each unit in a starting state in the N parallel unit subsystems after the start-stop control on each unit in the N parallel unit subsystems is completed, so that each unit in the starting state performs loading and unloading control according to the corresponding target temperature value and the control temperature.
According to the control device of the air conditioning system, the target temperature value set by a user is obtained through the obtaining module, the total outlet water temperature of the N parallel unit subsystems is obtained, the control module controls starting and stopping of each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and after the starting and stopping of each unit in the N parallel unit subsystems are completed, the target temperature value and the control temperature of each unit in a starting state in the N parallel unit subsystems are obtained, so that each unit in the starting state can be subjected to loading and unloading control according to the corresponding target temperature value and the control temperature. Therefore, each unit is controlled by adopting a one-level control mode, so that data processing becomes simple, compatible expansion of the units is facilitated, the method is suitable for series, parallel or series-parallel units, and the universality is high.
According to one embodiment of the invention, when the control module performs start control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, the control module firstly controls the start of the unit in the shutdown state in the unit subsystems corresponding to the unit in the start state, and controls the start of other unit subsystems after the units in the unit subsystems are all in the start state; or the control module controls the machine set subsystem in the shutdown state of each machine set in the N parallel machine set subsystems to start up until each machine set subsystem in the N parallel machine set subsystems has the machine set start-up, and then controls the machine set in the shutdown state in the N parallel machine set subsystems to start up.
According to an embodiment of the invention, when the control module performs shutdown control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, the control module firstly controls the units in the unit subsystems, which are in an on state and have the number greater than 1, in the N parallel unit subsystems to be shutdown, enables one unit in each unit subsystem in the N parallel unit subsystems to be in an on state, and then controls the N parallel unit subsystems to be shutdown; or the control module controls the unit in the unit subsystem corresponding to the unit in the shutdown state to be shut down firstly, and controls other unit subsystems to be shut down after all the units in the unit subsystem are shut down.
According to an embodiment of the present invention, when the control module obtains a target temperature value and a control temperature of each unit in a start state in the N parallel unit subsystems, the control module obtains an outlet water temperature of each unit in the N parallel unit subsystems, takes a minimum value of the outlet water temperature in each unit subsystem as a control temperature of each unit in an on state in the unit subsystem, and takes a target temperature value set by a user as a target temperature value of each unit in the on state; or the control module acquires the target temperature value of each set in the starting state according to the target temperature value set by the user and the outlet water temperature of each set in the starting state, and takes the outlet water temperature of each set in the starting state as the respective control temperature.
According to an embodiment of the present invention, the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature includes: if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control; and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
According to an embodiment of the present invention, the control module is integrated in any one of the N parallel unit subsystems, or the control module is an independent controller.
In order to achieve the above object, a fourth aspect of the present invention provides an air conditioning system, which includes the control device of the air conditioning system.
According to the air conditioning system provided by the embodiment of the invention, each unit is controlled by adopting a primary control mode through the control device, so that the data processing is simplified, the compatible expansion of the units is favorably realized, and the air conditioning system is suitable for series, parallel or series-parallel units and has strong universality.
Drawings
Fig. 1 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a block diagram of parallel unit subsystems in an air conditioning system according to one embodiment of the present invention;
FIG. 3 is a block diagram of parallel unit subsystems in an air conditioning system according to another embodiment of the present invention; and
fig. 4 is a block diagram illustrating a control apparatus of an air conditioning system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A control method of an air conditioning system, a computer-readable storage medium, a control device of an air conditioning system, and an air conditioning system having the control device proposed according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention.
In an embodiment of the present invention, the air conditioning system may include N parallel unit subsystems, wherein each unit subsystem is formed by at least one unit connected in series.
For example, as shown in fig. 2 and fig. 3, 4 parallel unit subsystems are taken as an example. The first unit subsystem can be formed by connecting a 1# unit and a 2# unit in series; the second unit subsystem can be formed by connecting a 3# unit and a 4# unit in series; the third unit subsystem can be composed of a No. 5 unit; the fourth unit subsystem can be formed by connecting the 6# unit and the 7# unit in series.
As shown in fig. 1, the control method of the air conditioning system according to the embodiment of the present invention may include the steps of:
and S1, acquiring a target temperature value set by a user, and acquiring the total outlet water temperature of the N parallel unit subsystems.
The target temperature value T is a temperature value set by a user according to needs, and the total water outlet temperature of the N parallel unit subsystems can be obtained in real time through a temperature sensor arranged on a water flow pipeline for collecting water outlet of the N parallel unit subsystems.
And S2, performing start-stop control on each unit in the N parallel unit subsystems according to the target temperature value and the total water outlet temperature set by the user.
Specifically, in order to avoid the problems that data processing conversion is complex and compatible expansion is not easy caused by two-stage control when the unit is in hybrid series-parallel connection, the two-stage control system is simplified into a one-stage control system, namely a master and a plurality of slaves, wherein the master and the slaves can be installed in any combination (such as series connection, parallel connection or series-parallel connection). After the installation of the host and the slave is finished, the host identifies the series unit and the parallel unit in the system, and controls the start or stop of the slave according to a target temperature value T set by a user and the total water outlet temperature of the N parallel unit subsystems.
Specifically, when the air conditioning system operates in a cooling mode, if a target temperature value T set by a user is greater than the total outlet water temperature, controlling the unit in a shutdown state to start according to a certain rule; and if the target temperature value T set by the user is less than the total outlet water temperature, controlling the unit in the starting state to stop according to a certain rule. When the air conditioning system operates in a heating mode, if a target temperature value T set by a user is smaller than the total outlet water temperature, controlling the unit in a shutdown state to start according to a certain rule; and if the target temperature value T set by the user is greater than the total outlet water temperature, controlling the unit in the starting state to stop according to a certain rule. After the unit is started/stopped once, the sizes of the primary target temperature value and the total effluent temperature value are judged until the difference between the target temperature value and the total effluent temperature meets the requirement, for example, the difference between the target temperature value T and the total effluent temperature is less than 1 ℃, and then the unit is kept in the current state.
The start-stop rules of the unit are explained in detail below.
According to one embodiment of the invention, when each unit in the N parallel unit subsystems is started and controlled according to a target temperature value and a total water outlet temperature set by a user, the unit in a shutdown state in the unit subsystems corresponding to the unit in a starting state is controlled to start, and after all the units in the unit subsystems are in the starting state, other unit subsystems are controlled to start; or, the machine set subsystem in the shutdown state of each machine set in the N parallel machine set subsystems is controlled to start firstly until each machine set subsystem in the N parallel machine set subsystems is started, and then the machine set in the shutdown state of the N parallel machine set subsystems is controlled to start.
According to another embodiment of the invention, when the shutdown control is performed on each unit in the N parallel unit subsystems according to the target temperature value and the total outlet water temperature set by the user, the unit in the unit subsystems, the number of which is greater than 1, in the N parallel unit subsystems is controlled to be shutdown, one unit in each unit subsystem in the N parallel unit subsystems is enabled to be in the enabled state, and then the N parallel unit subsystems are controlled to be shutdown; or firstly controlling the machine set in the machine set subsystem corresponding to the machine set in the shutdown state to be shutdown, and then controlling other machine set subsystems to be shutdown after all the machine sets in the machine set subsystem are shutdown.
In particular, the system shown in fig. 2 and 3 is still taken as an example. Suppose that the 1# unit is used as a master of 4 parallel unit subsystems, and the 2# unit, the 3# unit, the 4# unit, the 5# unit, the 6# unit and the 7# unit are used as slaves.
The sequence in which the master controls the slave to be in the activated state will be described first.
Example one: when the unit is judged to need to be started, the unit subsystem where the unit in the starting state is located can be preferentially screened, then whether an un-started unit exists in the unit subsystem or not is judged, and if the un-started unit exists in the unit subsystem, the un-started unit in the unit subsystem is preferentially started. For example, if the 3# unit is already in a starting state, the 4# unit can be started preferentially when judging that other units need to be started; for another example, if the 3# unit and the 6# unit are both in the starting state, the host may start the 4# unit that forms the unit subsystem with the 3# unit first, or start the 7# unit that forms the unit subsystem with the 6# unit, and specifically may determine the starting sequence according to the configuration of the slave, the target temperature value set by the user, and the total outlet water temperature.
After the starting is finished, delaying for a period of time, judging whether the unit needs to be continuously started according to a target temperature value set by a user and the total outlet water temperature, if so, continuously starting the unit according to the above mode until all the units in all the unit subsystems in the starting state are in the starting state, and then controlling the starting of the units in other unit subsystems according to a certain rule. For example, starting according to a unit coding sequence; or, the temperature difference value is determined according to the temperature difference value between the target temperature value T set by the user and the total outlet water temperature, and if the temperature difference value is large, the unit with the higher outlet water temperature is started; and when the temperature difference is small, starting the units with lower water outlet temperature, and keeping the state of each unit unchanged until the difference between the target temperature value T set by the user and the total water outlet temperature is small.
Example two: the method comprises the steps of firstly removing a unit subsystem where a unit which is already in a starting state is located, and preferentially starting an unit subsystem which is not started in 4 parallel unit subsystems, namely preferentially starting a unit in the unit subsystems which are all in a stopping state in the 4 parallel unit subsystems, for example, a 3# unit is already in a starting state, and then when a host controls other units to be started, the 4# unit is not started, and the 5# unit or the 6# unit is preferentially started.
After the start is finished, delaying for a period of time, judging whether the unit needs to be continuously started according to a target temperature value set by a user and the total outlet water temperature, if so, continuously starting the unit according to the above mode until all the units in each unit system are in a starting state, and then controlling the unit which is not started to be started according to a certain rule. For example, the starting sequence may be determined according to the number of the units in the shutdown state in each unit subsystem, such as preferentially starting the units in the unit subsystem with a larger number; or, the units in the shutdown state are sequentially started according to the unit coding sequence; or determining the starting sequence of the units which are not started according to the difference value between the target temperature value T set by the user and the total outlet water temperature, and keeping the state of each unit unchanged until the difference value between the target temperature value T set by the user and the total outlet water temperature is small.
Next, the sequence in which the master controls the slave to be in the shutdown state will be described.
Example one: when the unit is required to be suspended, the unit subsystems with the number of the units in the starting state larger than 1 in all the unit subsystems can be preferentially screened out, and then the units in the unit subsystems are preferentially suspended. For example, all the units in the 4 parallel unit subsystems are in an on state, and when the units need to be suspended, the 2# unit, the 4# unit (or the 3# unit) and the 7# unit (or the 6# unit) can be suspended first.
After the shutdown is completed, delaying for a period of time, and then judging whether the unit needs to be continuously suspended according to a target temperature value set by a user and the total outlet water temperature, if so, continuously suspending the units in the unit subsystems of which the starting number is more than 1 so as to ensure that one unit in each unit subsystem is in a starting state. When only one unit in each unit subsystem is in a starting state and the unit needs to be suspended continuously, the units can be suspended in sequence according to the coding sequence of the units; or, determining a suspension sequence of the units according to a temperature difference value between a target temperature value T set by a user and the total effluent temperature, for example, when the temperature difference value is large, suspending the unit with the higher effluent temperature first; when the temperature difference is small, the unit with the small water outlet temperature can be suspended firstly until the difference between the target temperature value T set by the user and the total water outlet temperature is small, and the state of each unit is kept unchanged.
Example two: firstly, determining the unit subsystem where the unit is suspended last time, judging whether other units in the starting state exist in the unit subsystem, and if so, suspending the unit in the starting state in the unit subsystem preferentially. For example, the unit that was suspended last is the 3# unit, and when the unit needs to be suspended again, the 4# unit can be suspended preferentially.
After the start is finished, delaying for a period of time, judging whether the unit needs to be continuously started according to a target temperature value set by a user and the total outlet water temperature, and if so, continuing to suspend the unit in the starting state in the unit subsystem until all the units in the unit subsystem are in the shutdown state. If the unit still needs to be suspended, the unit can be suspended in sequence according to the coding sequence of the unit; or determining the suspension sequence of the units according to the temperature difference between the target temperature value T set by the user and the total outlet water temperature, and keeping the state of each unit unchanged until the difference between the target temperature value T set by the user and the total outlet water temperature is small.
It can be understood that, in the embodiment of the present invention, the master may be an additional master controller, at this time, the 1# unit to the 7# unit are all used as slaves, the master controller performs start-stop control on the slaves (the 1# unit to the 7# unit) according to the target temperature value and the total effluent temperature set by the user, a control method is the same as the control method of the master being the 1# unit, and a detailed description thereof is omitted here.
And S3, after the start-stop control of each unit in the N parallel unit subsystems is completed, acquiring the target temperature value and the control temperature of each unit in the starting state in the N parallel unit subsystems, so that each unit in the starting state performs loading and unloading control according to the corresponding target temperature value and the control temperature.
According to an embodiment of the present invention, obtaining a target temperature value and a control temperature of each unit in a start state in N parallel unit subsystems includes: acquiring the outlet water temperature of each unit in N parallel unit subsystems, taking the minimum value of the outlet water temperature of each unit subsystem as the control temperature of each unit in an open state in the unit subsystem, and taking a target temperature value set by a user as the target temperature value of each unit in the open state; or acquiring the target temperature value of each set in the starting state according to the target temperature value set by the user and the outlet water temperature of each set in the starting state, and taking the outlet water temperature of each set in the starting state as the respective control temperature.
Further, according to an embodiment of the present invention, the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature includes: if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control; and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
Specifically, after the master machine controls the slave machine to start and stop according to the target temperature value and the total effluent temperature, the slave machine performs loading and unloading control according to the target temperature value and the control temperature, and the master machine also performs loading and unloading control according to the target temperature value and the control temperature (when the master machine is any one of a plurality of parallel machine set subsystems).
When the target temperature value and the control temperature of each unit are obtained, the water outlet temperature of the corresponding unit can be obtained through a temperature sensor arranged at the water outlet of each unit, then the host reads the water outlet temperatures of all the units in the starting state, compares the water outlet temperatures of all the units connected in series in each unit subsystem to obtain the minimum water outlet temperature of each unit subsystem as the control temperature of each unit in the unit subsystem, and simultaneously takes the target temperature value set by a user as the target temperature value of all the units in the starting state.
For example, assuming that all units (1# unit to 7# unit) are in a start state, as shown in fig. 2, the minimum outlet water temperature obtained by the first unit subsystem is the outlet water temperature of the 2# unit, which is denoted as outlet water temperature 2, and then the control temperatures of the 1# unit and the 2# unit are both outlet water temperature 2. Similarly, the control temperatures of the 3# unit and the 4# unit are both the water outlet temperature 4, and only one unit is in the unit subsystem where the 5# unit is located, so that the control temperature of the 5# unit is the water outlet temperature of the 5# unit, that is, the control temperatures of the water outlet temperature 5, the 6# unit and the 7# unit are both the water outlet temperature 7.
Further, considering that energy efficiency of each unit is different, when the units need to be controlled more accurately, the host machine can calculate a target temperature value of each unit according to a target temperature value set by a user and a water outlet temperature of each unit in an open state (comprehensively considering a water inlet and outlet temperature difference of each unit, energy efficiency of each unit and the like), and send the target temperature value of each unit to the corresponding unit, wherein when only one unit in the unit subsystems is in a start state, the target temperature value of the unit is the target temperature value set by the user. Meanwhile, the host sends the obtained outlet water temperature of each set in the starting state to the corresponding set to serve as the control temperature of the set.
For example, assuming that all units (1# unit to 7# unit) are in a start state, as shown in fig. 3, the target temperature value of the 1# unit is T1, the control temperature is outlet water temperature 1, the target temperature value of the 2# unit is T2, the control temperature is outlet water temperature 2, the target temperature value of the 3# unit is T3, the control temperature is outlet water temperature 3, the target temperature value of the 4# unit is T4, the control temperature is outlet water temperature 4, the target temperature value of the 5# unit is target temperature value T set by a user, the control temperature is outlet water temperature 5, the target temperature value of the 6# unit is T6, the control temperature is outlet water temperature 6, the target temperature value of the 7# unit is T7, and the control temperature is outlet water temperature 7.
After the control temperature and the target temperature value corresponding to each unit in each unit subsystem are obtained, the control temperature and the target temperature value of each unit are judged. If the control temperature of the unit is greater than the target temperature value, carrying out loading control; and if the control temperature of the unit is less than the target temperature value, carrying out unloading control. The loading and unloading control can load and unload the unit and can also load and unload the unit subsystem where the unit is located. For example, each unit may include more than one compressor, and if two compressors are currently running, one compressor may be turned on again when loading is required; or controlling other units in the unit subsystem where the unit is located to be in a starting state. Similarly, when unloading is needed, one of the compressors can be closed; or controlling other units in the unit subsystem where the unit is located to be in a shutdown state so as to realize loading and unloading control of each unit.
The control method of the air conditioning system adopts a setting mode of one host and a plurality of slave machines, the host controls the unit to start and stop according to a target temperature value set by a user and the total effluent water temperature of the system, and the slave machines control the load according to the target temperature value and the control temperature of the slave machines. When the control temperature is higher than the target temperature value of the control temperature, the load is loaded in a certain mode, and when the control temperature is lower than the target temperature value of the control temperature, the load is relieved in a certain mode, so that the original two-stage control system is simplified into a one-stage control system, the data processing is simplified, the compatible expansion of the units is favorably realized, for example, the system can be expanded into the condition that two or more units are connected in series and then a plurality of units are connected in parallel, or the system is directly applied to the condition that a plurality of units are connected in series and not connected in parallel.
In summary, according to the control method of the air conditioning system in the embodiment of the present invention, first, a target temperature value set by a user is obtained, and a total outlet water temperature of the N parallel unit subsystems is obtained, then, start-stop control is performed on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and after the start-stop control is completed on each unit in the N parallel unit subsystems, a target temperature value and a control temperature of each unit in a start state in the N parallel unit subsystems are obtained, so that each unit in the start state performs load and unload control according to the corresponding target temperature value and control temperature. Therefore, each unit is controlled by adopting a one-level control mode, so that data processing becomes simple, compatible expansion of the units is facilitated, the method is suitable for series, parallel or series-parallel units, and the universality is high.
Fig. 4 is a block diagram schematically illustrating a control apparatus of an air conditioning system according to an embodiment of the present invention. In an embodiment of the present invention, the air conditioning system may include N parallel unit subsystems, wherein each unit subsystem is formed by at least one unit connected in series.
As shown in fig. 4, the control apparatus of an air conditioning system according to an embodiment of the present invention may include: an acquisition module 10 and a control module 20.
The obtaining module 10 is configured to obtain a target temperature value set by a user, and obtain a total outlet water temperature of the N parallel unit subsystems. The control module 20 is connected to the obtaining module 10, and the control module 20 is configured to perform start-stop control on each unit in the N parallel unit subsystems according to a target temperature value and a total outlet water temperature set by a user, and after the start-stop control on each unit in the N parallel unit subsystems is completed, obtain a target temperature value and a control temperature of each unit in a start state in the N parallel unit subsystems, so that each unit in the start state performs loading and unloading control according to the corresponding target temperature value and control temperature.
According to an embodiment of the present invention, when the control module 20 performs start control on each unit of the N parallel unit subsystems according to a target temperature value and a total outlet water temperature set by a user, wherein the control module 20 first controls the unit in a shutdown state in the unit subsystems corresponding to the unit in a start state to start, and then controls other unit subsystems to start after the units in the unit subsystems are all in a start state; or, the control module 20 first controls the machine set subsystem in the shutdown state of each machine set of the N parallel machine set subsystems to start until each machine set subsystem of the N parallel machine set subsystems has a machine set start, and then controls the machine set in the shutdown state of the N parallel machine set subsystems to start.
According to an embodiment of the present invention, when the control module 20 performs shutdown control on each unit in the N parallel unit subsystems according to a target temperature value and a total outlet water temperature set by a user, wherein the control module 20 first controls the units in the unit subsystems, which are in an on state and have the number greater than 1, in the N parallel unit subsystems to shutdown, and makes each unit subsystem in the N parallel unit subsystems have one unit in an on state, and then controls the N parallel unit subsystems to shutdown; or, the control module 20 first controls the unit in the unit subsystem corresponding to the unit in the shutdown state to shutdown, and then controls the other unit subsystems to shutdown after all the units in the unit subsystem are shutdown.
According to an embodiment of the present invention, when the control module 20 obtains a target temperature value and a control temperature of each unit in a start state in N parallel unit subsystems, the control module 20 obtains an outlet water temperature of each unit in the N parallel unit subsystems, takes a minimum value of the outlet water temperature in each unit subsystem as a control temperature of each unit in an on state in the unit subsystem, and takes a target temperature value set by a user as the target temperature value of each unit in the on state; or, the control module 20 obtains the target temperature value of each unit in the on state according to the target temperature value set by the user and the outlet water temperature of each unit in the on state, and takes the outlet water temperature of each unit in the on state as the respective control temperature.
According to an embodiment of the present invention, the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature includes: if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control; and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
According to an embodiment of the present invention, the control module 20 may be integrated into any one of the N parallel unit subsystems, or the control module 20 may be a stand-alone controller.
It should be noted that, for details that are not disclosed in the control device of the air conditioning system according to the embodiment of the present invention, please refer to details that are disclosed in the control method of the air conditioning system according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the control device of the air conditioning system, the target temperature value set by a user is obtained through the obtaining module, the total outlet water temperature of the N parallel unit subsystems is obtained, the control module controls starting and stopping of each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and after the starting and stopping of each unit in the N parallel unit subsystems are completed, the target temperature value and the control temperature of each unit in a starting state in the N parallel unit subsystems are obtained, so that each unit in the starting state can be subjected to loading and unloading control according to the corresponding target temperature value and the control temperature. Therefore, each unit is controlled by adopting a one-level control mode, so that data processing becomes simple, compatible expansion of the units is facilitated, the method is suitable for series, parallel or series-parallel units, and the universality is high.
In addition, an embodiment of the present invention also provides a computer-readable storage medium having instructions stored therein, which when executed, perform the control method of the air conditioning system described above.
The computer-readable storage medium of the embodiment of the invention controls each unit by executing the control method of the air conditioning system and adopting a primary control mode, so that the data processing is simplified, the compatible expansion of the units is favorably realized, and the computer-readable storage medium is suitable for series, parallel or series-parallel units and has strong universality.
In addition, the embodiment of the invention also provides an air conditioning system which comprises the control device of the air conditioning system.
According to the air conditioning system provided by the embodiment of the invention, each unit is controlled by adopting a primary control mode through the control device, so that the data processing is simplified, the compatible expansion of the units is favorably realized, and the air conditioning system is suitable for series, parallel or series-parallel units and has strong universality.
It should be understood that portions of the present invention 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.
In addition, in the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A control method of an air conditioning system is characterized in that the air conditioning system comprises N parallel unit subsystems, wherein each unit subsystem is formed by connecting at least one unit in series, and the method comprises the following steps:
acquiring a target temperature value set by a user, and acquiring the total outlet water temperature of the N parallel unit subsystems;
performing start-stop control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature;
and after the start-stop control of each unit in the N parallel unit subsystems is finished, acquiring a target temperature value and a control temperature of each unit in a starting state in the N parallel unit subsystems so as to enable each unit in the starting state to carry out loading and unloading control according to the corresponding target temperature value and the control temperature.
2. The control method of an air conditioning system according to claim 1, wherein, when each unit of the N parallel unit subsystems is start-controlled according to the target temperature value set by the user and the total outlet water temperature, wherein,
firstly, controlling the starting of the unit in the shutdown state in the unit subsystems corresponding to the unit in the starting state, and controlling the starting of other unit subsystems after the units in the unit subsystems are all in the starting state; or,
the method comprises the steps of firstly controlling the machine set subsystem of each machine set in the N parallel machine set subsystems to be in a shutdown state to be started until each machine set subsystem of the N parallel machine set subsystems is started, and then controlling the machine set in the N parallel machine set subsystems to be in a shutdown state to be started.
3. The control method of an air conditioning system according to claim 1 or 2, characterized in that, when performing shutdown control on each unit of the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, wherein,
firstly, controlling the shutdown of the units in the unit subsystems with the number of the units in the starting state larger than 1 in the N parallel unit subsystems, enabling one unit in each unit subsystem in the N parallel unit subsystems to be in the starting state, and then controlling the shutdown of the N parallel unit subsystems; or,
the method comprises the steps of firstly controlling the units in the unit subsystems corresponding to the units in the shutdown state to be shutdown, and then controlling other unit subsystems to be shutdown after all the units in the unit subsystems are shutdown.
4. The method for controlling an air conditioning system according to claim 1, wherein the obtaining of the target temperature value and the control temperature of each unit in the startup state in the N parallel unit subsystems comprises:
acquiring the outlet water temperature of each unit in the N parallel unit subsystems, taking the minimum value of the outlet water temperature in each unit subsystem as the control temperature of each unit in an open state in the unit subsystem, and taking the target temperature value set by the user as the target temperature value of each unit in the open state; or,
and acquiring the target temperature value of each set in the starting state according to the target temperature value set by the user and the outlet water temperature of each set in the starting state, and taking the outlet water temperature of each set in the starting state as respective control temperature.
5. The control method of the air conditioning system according to claim 4, wherein the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature comprises:
if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control;
and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
6. A computer-readable storage medium having instructions stored therein, which when executed, perform a control method of an air conditioning system according to any one of claims 1 to 5.
7. A control apparatus for an air conditioning system, the air conditioning system including N parallel unit subsystems, wherein each unit subsystem is formed by at least one unit connected in series, the apparatus comprising:
the acquisition module is used for acquiring a target temperature value set by a user and acquiring the total outlet water temperature of the N parallel unit subsystems;
and the control module is used for performing start-stop control on each unit in the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, and acquiring the target temperature value and the control temperature of each unit in a starting state in the N parallel unit subsystems after the start-stop control on each unit in the N parallel unit subsystems is completed, so that each unit in the starting state performs loading and unloading control according to the corresponding target temperature value and the control temperature.
8. The control device of air conditioning system according to claim 7, wherein the control module performs start-up control of each unit of the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature,
the control module controls the starting of the unit in the shutdown state in the unit subsystems corresponding to the unit in the starting state, and controls the starting of other unit subsystems after the units in the unit subsystems are all in the starting state; or,
the control module controls the machine set subsystem in a shutdown state of each machine set in the N parallel machine set subsystems to start up until each machine set subsystem in the N parallel machine set subsystems has a machine set to start up, and then controls the machine set in a shutdown state in the N parallel machine set subsystems to start up.
9. The control device of air conditioning system according to claim 7 or 8, wherein the control module performs shutdown control on each unit of the N parallel unit subsystems according to the target temperature value set by the user and the total outlet water temperature, wherein,
the control module controls the machine sets in the machine set subsystems with the number of the machine sets in the starting state larger than 1 in the N parallel machine set subsystems to stop firstly, enables one machine set in each machine set subsystem in the N parallel machine set subsystems to be in the starting state, and then controls the N parallel machine set subsystems to stop; or,
the control module controls the unit in the unit subsystem corresponding to the unit in the shutdown state to be shut down, and controls other unit subsystems to be shut down after all the units in the unit subsystem are shut down.
10. The control device of an air conditioning system according to claim 7, wherein the control module, when acquiring the target temperature value and the control temperature of each unit in a start-up state among the N parallel unit subsystems, wherein,
the control module acquires the outlet water temperature of each unit in the N parallel unit subsystems, takes the minimum value of the outlet water temperature of each unit subsystem as the control temperature of each unit in an open state in the unit subsystem, and takes the target temperature value set by the user as the target temperature value of each unit in the open state; or,
the control module obtains the target temperature value of each set in the starting state according to the target temperature value set by the user and the outlet water temperature of each set in the starting state, and takes the outlet water temperature of each set in the starting state as the respective control temperature.
11. The control device of air conditioning system according to claim 10, wherein the loading and unloading control of each unit in the startup state according to the corresponding target temperature value and the control temperature includes:
if the control temperature of the unit is greater than the target temperature value of the unit, carrying out loading control;
and if the control temperature of the unit is less than the target temperature value of the unit, carrying out unloading control.
12. The control device of the air conditioning system according to claim 7, wherein the control module is integrally provided in any one of the N parallel unit subsystems, or the control module is an independent controller.
13. An air conditioning system characterized by comprising the control device of the air conditioning system according to any one of claims 7 to 12.
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Effective date of registration: 20230714 Address after: 401336 No. 15 Rose Road, Nanan District, Chongqing Patentee after: CHONGQING MIDEA GENERAL REFRIGERATION EQUIPMENT Co.,Ltd. Patentee after: MIDEA GROUP Co.,Ltd. Patentee after: Meitong Energy Technology (Chongqing) Co.,Ltd. Address before: 401336 No. 15 Rose Road, Nanan District, Chongqing Patentee before: CHONGQING MIDEA GENERAL REFRIGERATION EQUIPMENT Co.,Ltd. Patentee before: MIDEA GROUP Co.,Ltd. |