CN112665145B - Two-stage system cooperative control method and device, controller and air handling unit - Google Patents
Two-stage system cooperative control method and device, controller and air handling unit Download PDFInfo
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Abstract
The invention relates to a two-stage system cooperative control method, a device, a controller and an air handling unit, wherein the two-stage system cooperative control method comprises the following steps: acquiring environmental working conditions and user demand information; calculating the unit capacity requirement according to the environment working condition and the requirement information of the user; determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems; and controlling the two sets of systems to operate according to the operation state. According to the invention, the running states of two sets of systems are reasonably controlled through environmental working conditions and user requirements and the accumulated running time of the systems, so that the rotation is realized, and the problem of uneven load distribution of the two-stage systems under the condition of nonstandard load when the two-stage systems are simultaneously started is solved; and when the low-load single-stage system operates, the one-stage system is always started, so that the problem of unbalanced starting is solved, and the operation reliability of the whole machine is effectively improved.
Description
Technical Field
The invention relates to the technical field of double-stage air treatment, in particular to a double-stage system cooperative control method, a double-stage system cooperative control device, a double-stage system cooperative control controller and an air treatment unit.
Background
Along with the increasing attention of people to fresh air and air quality, the air treatment degree of a large-scale direct-expansion air treatment unit is required to be higher and higher in the market, and a double-stage refrigeration air treatment mode is provided for meeting the air deep treatment requirements of users.
However, the currently used processing control method between two stages of a dual-stage system is completely independent, and the following problems can be caused:
1. when the two-stage system is uniformly started, the load adaptability is poor, the two-stage system of the unit is cooled according to the same preset target, so that the load distribution of the two-stage system is uneven under other conditions except the standard working condition, the first-stage system is loaded, and the second-stage system is light in load.
2. When a system needs to be started, a first-level system is always started; because the two-stage systems are the same and the set temperatures are consistent, when the refrigerating low-load operation or the heating low-load operation is caused, the requirement can be met by only opening one system, at the moment, the one-stage system is opened, the total opening time of the one-stage system is far longer than that of the two-stage system, the possibility of system faults is increased, and the reliable operation of a unit is not guaranteed.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, a controller and an air handling unit for cooperative control of a dual-stage system, so as to solve the problem of uneven load distribution of the dual-stage system under the condition of non-standard load when the dual-stage systems are simultaneously turned on; and when the low-load single-stage system runs, the one-stage system is always started, so that the starting is unbalanced.
In order to achieve the purpose, the invention adopts the following technical scheme: a dual-stage system cooperative control method comprises the following steps:
acquiring environmental working conditions and user demand information;
calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems;
and controlling the two sets of systems to operate according to the operation state.
Optionally, the environmental condition includes:
the temperature or relative humidity of the dry and wet air inlet of the indoor unit.
Optionally, determining the operating states of the two sets of systems according to the unit capacity requirement and the rated capacity of the outdoor unit of each set of system includes:
if the unit capacity requirement is smaller than a first specific multiple of the rated capacity of the minimum outdoor unit, respectively acquiring the accumulated operation time of the two sets of systems; determining the running states of the two sets of systems according to the accumulated running duration;
if the unit capacity requirement is larger than a second specific multiple of the rated capacity of the maximum outdoor unit, the two sets of systems are started simultaneously, and the initial distribution capacities of the two sets of systems are half of the unit capacity requirement;
and if the unit capacity requirement is greater than or equal to a first specific multiple of the minimum outdoor unit rated capacity and is less than or equal to a second specific multiple of the maximum outdoor unit rated capacity, the two sets of systems operate according to the last operation state.
Optionally, determining the operating states of the two sets of systems according to the accumulated operating duration includes:
if the accumulated running time of the first set of system is longer than that of the second set of system, the second set of system is started; otherwise, the first set of system is started.
Optionally, when the capacity requirement of the unit is greater than or equal to a first specific multiple of the minimum outdoor unit rated capacity and less than or equal to a second specific multiple of the maximum outdoor unit rated capacity, and the unit is operated for the first time, two sets of systems are simultaneously started, and the initial distribution capacities of the two sets of systems are both half of the capacity requirement of the unit.
Optionally, the method further includes:
judging whether a module in the double-stage system sends out a capacity-limiting output signal or not;
when no module in the two-stage system sends out a capacity-limiting output signal, the two systems operate according to the initial distribution capacity, and the operation output of the unit is adjusted according to the difference between the actual outlet air temperature of the systems and the required outlet air temperature calculated by the distribution capacity;
when a certain module in the double-stage system sends out a capacity limiting output signal, acquiring the running capacity of the system where the module is located; and adjusting the distribution capacity of the other set of system to be the difference between the unit capacity requirement and the current operation capacity of the system where the module is located;
when a plurality of modules in the double-stage system send out capacity limiting output signals, the two sets of systems still operate according to the current capacity distribution mode.
The invention also provides a two-stage system cooperative control device, which comprises:
the acquisition module is used for acquiring environmental working conditions and requirement information of a user;
the calculation module is used for calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
the determining module is used for determining the running states of the two sets of systems according to the capacity requirement of the unit and the rated capacity of the outdoor unit of each set of system;
and the control module is used for controlling the two sets of systems to operate according to the operation state.
The invention also provides a controller for executing the double-stage system cooperative control method.
The invention also provides an air handling unit comprising:
a dual stage air treatment system, and a controller as previously described;
the controller is connected with the dual-stage air treatment system.
Optionally, the air handling unit comprises: fresh air handling unit and air conditioning unit.
By adopting the technical scheme, the two-stage system cooperative control method comprises the following steps: acquiring environmental working conditions and user demand information; calculating the unit capacity requirement according to the environment working condition and the requirement information of the user; determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems; and controlling the two sets of systems to operate according to the operation state. According to the invention, the running states of two sets of systems are reasonably controlled through environmental working conditions and user requirements and the accumulated running time of the systems, so that the rotation is realized, and the problem of uneven load distribution of the two-stage systems under the condition of nonstandard load when the two-stage systems are simultaneously started is solved; and when the low-load single-stage system operates, the one-stage system is always started, so that the problem of unbalanced starting is solved, and the operation reliability of the whole machine is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a dual-stage cooperative control method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a two-stage cooperative control method according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a dual-stage cooperative control apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an air handling unit according to an embodiment of the present invention.
In the figure: 1. an acquisition module; 2. a calculation module; 3. a determination module; 4. a control module; 5. a first system; 6. a second system; 7. and a controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic flow chart of a dual-stage system cooperative control method according to an embodiment of the present invention.
As shown in fig. 1, the method for cooperative control of a dual-stage system according to the present embodiment includes:
s101: acquiring environmental working conditions and user demand information;
further, the environmental conditions include:
the temperature or relative humidity of the dry and wet air inlet of the indoor unit.
S102: calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
further, the unit capacity requirement is the capacity of the unit initial output calculated by the unit based on the user requirement, that is, assuming the actual air outlet temperature is 30 ℃, the air outlet temperature is set to 20 ℃, then the unit calculates the initial capacity required to be output by the unit according to the user requirement and the current actual situation so as to meet the air outlet requirement of the user, and the requirement is the unit capacity requirement.
S103: determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems;
further, determining the operating states of the two sets of systems according to the unit capacity requirement and the rated capacity of the outdoor unit of each set of systems includes:
if the unit capacity requirement is smaller than a first specific multiple of the rated capacity of the minimum outdoor unit, respectively acquiring the accumulated operation time of the two sets of systems; determining the running states of the two sets of systems according to the accumulated running duration;
if the unit capacity requirement is larger than a second specific multiple of the rated capacity of the maximum outdoor unit, the two sets of systems are started simultaneously, and the initial distribution capacities of the two sets of systems are half of the unit capacity requirement;
and if the unit capacity requirement is greater than or equal to a first specific multiple of the minimum outdoor unit rated capacity and is less than or equal to a second specific multiple of the maximum outdoor unit rated capacity, the two sets of systems operate according to the last operation state.
Further, determining the operating states of the two sets of systems according to the accumulated operating duration includes:
if the accumulated running time of the first set of system is longer than that of the second set of system, the second set of system is started; otherwise, the first set of system is started.
Further, when the capacity requirement of the unit is greater than or equal to a first specific multiple of the minimum outdoor unit rated capacity and less than or equal to a second specific multiple of the maximum outdoor unit rated capacity, and the unit is operated for the first time, two sets of systems are simultaneously started, and the initial distribution capacity of the two sets of systems is half of the capacity requirement of the unit.
S104: and controlling the two sets of systems to operate according to the operation state.
The two-stage system cooperative control method reasonably controls the running states of the two sets of systems through the environmental working conditions and the user requirements and the accumulated running time of the systems, realizes alternation, and solves the problem of uneven load distribution of the two-stage systems under the condition of nonstandard load when the two-stage systems are simultaneously started; and when the low-load single-stage system operates, the one-stage system is always started, so that the problem of unbalanced starting is solved, and the operation reliability of the whole machine is effectively improved.
Fig. 2 is a schematic flow chart of a dual-stage system cooperative control method according to a second embodiment of the present invention.
As shown in fig. 2, the method for cooperative control of a dual-stage system according to the present embodiment includes:
s201: acquiring environmental working conditions and user demand information;
further, the environmental conditions include:
the temperature or relative humidity of the dry and wet air inlet of the indoor unit.
S202: calculating a unit capacity requirement A according to the environment working condition and the requirement information of the user;
s203: if the unit capacity requirement A is smaller than a first specific multiple (the first specific multiple can be recorded as m) of the minimum outdoor unit rated capacity B, respectively acquiring the accumulated operation time of the two sets of systems; determining the running states of the two sets of systems according to the accumulated running duration;
further, determining the operating states of the two sets of systems according to the accumulated operating duration includes:
if the accumulated running time of the first set of system is longer than that of the second set of system, the second set of system is started; otherwise, the first set of system is started.
S204: if the unit capacity requirement A is larger than a second specific multiple (the second specific multiple can be marked as n) of the maximum outdoor unit rated capacity C, the two sets of systems are simultaneously started, and the initial distribution capacity of the two sets of systems is half of the unit capacity requirement;
s205: and if the unit capacity requirement A is greater than or equal to a first specific multiple m of the minimum outdoor unit rated capacity B and is less than or equal to a second specific multiple n of the maximum outdoor unit rated capacity C, operating the two sets of systems according to the last operating state. If the unit operates for the first time, the two sets of systems are started simultaneously, and the initial distribution capacity of the two sets of systems is half of the capacity requirement of the unit.
And m and n are a quantity value and can be set according to actual conditions so as to avoid frequent reciprocating opening, and no specific value limitation is made here.
Controlling the two sets of systems to operate according to the operating state;
when the two systems are operated, the set is adjusted in the following way after being started:
s206: judging whether a module in the double-stage system sends out a capacity-limiting output signal or not;
s207: when no module in the two-stage system sends out a capacity-limiting output signal, the two systems operate according to the initial distribution capacity, and the operation output of the unit is adjusted according to the difference between the actual outlet air temperature of the systems and the required outlet air temperature calculated by the distribution capacity;
s208: when a certain module in the double-stage system sends out a capacity limiting output signal, acquiring the running capacity of the system where the module is located; and adjusting the distribution capacity of the other set of system to be the difference between the unit capacity requirement and the current operation capacity of the system where the module is located;
s209: when a plurality of modules in the double-stage system send out capacity limiting output signals, the two sets of systems still operate according to the current capacity distribution mode.
The method provided by the embodiment is cooperated with two-stage system control, can balance the capability distribution of the two-stage system and the frequency of single-stage starting, and is beneficial to improving the operation reliability of the unit.
Fig. 3 is a schematic structural diagram provided by an embodiment of a dual-stage system cooperative control device of the present invention.
As shown in fig. 3, the dual-stage system cooperative control device according to the present embodiment includes:
the system comprises an acquisition module 1, a processing module and a display module, wherein the acquisition module is used for acquiring environmental working conditions and requirement information of a user;
the calculation module 2 is used for calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
the determining module 3 is used for determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems;
and the control module 4 is used for controlling the two sets of systems to operate according to the operation state.
The working principle of the dual-stage system cooperative control device described in this embodiment is the same as that of the dual-stage system cooperative control method described in any of the above embodiments, and details are not repeated here.
The two-stage system cooperative control device can reasonably control the running states of two sets of systems through environmental working conditions and user requirements and the accumulated running time of the systems, realizes alternation, and solves the problem of uneven load distribution of the two-stage systems under the condition of nonstandard load when the two-stage systems are simultaneously started; and when the low-load single-stage system operates, the problem of starting imbalance is solved, and the operation reliability of the whole machine is effectively improved.
The invention also provides a controller for executing the dual-stage system cooperative control method described in fig. 1 or fig. 2.
FIG. 4 is a schematic structural diagram of an air handling unit according to an embodiment of the present invention.
As shown in fig. 4, the air handling unit according to this embodiment includes:
a dual stage air treatment system, and a controller as previously described;
the controller is connected with the dual-stage air treatment system.
In fig. 4, the dual-stage air treatment system includes a first system and a second system, where the first system and the second system are respectively connected to the controller and are configured to receive a control instruction sent by the controller. For each individual system (a first system or a second system), the indoor unit is connected with the outdoor unit through a communication network A, the first system is further connected with the second system through a communication network B, and an air supply outlet of the first system is connected to a return air inlet of the second system through an air pipe, so that multi-stage treatment of return air can be realized.
The temperature or relative humidity of the inlet air dry-wet bulb of the indoor unit is acquired by a temperature sensing bulb arranged on the system.
Further, the air handling unit includes: fresh air handling unit and air conditioning unit.
In practical use, after the network collocation of the two-stage system is finished, the master/slave of the unit is confirmed through hardware code extraction or a software program.
If the indoor unit is detected to be started, the controller calculates the unit capacity requirement A through the acquired air inlet dry-wet-bulb temperature or relative humidity of the indoor unit, the requirement information of a user (the requirement dry-wet-bulb temperature or relative humidity set by the user through the line controller) and the rated capacity of the indoor unit, and compares the calculated unit capacity requirement A with the rated capacity of the outdoor unit:
(1) if the unit capacity requirement A is less than m and the minimum outdoor unit rated capacity B, determining the operation states of the two systems according to the accumulated operation time of the first system and the second system: and if the accumulated running time of the first system is longer than that of the second system, starting the second system to run, and otherwise, starting the first system.
(2) If the capacity requirement A of the unit is larger than n × the rated capacity C of the maximum outdoor unit, the first system and the second system are started to operate simultaneously, the initial distribution capacity of the first system and the initial distribution capacity of the second system are both A/2, and the unit is adjusted in the following mode after being started:
a. and if the limit capacity output mark sent by a certain module in the system is detected to be set to 0, the two sets of systems operate according to the initial distribution capacity, and the unit operation output is adjusted according to the difference between the actual air outlet temperature of the systems and the required air outlet temperature calculated by the distribution capacity.
b. If the limit capacity output mark sent by a certain module in the system is detected to be set to be 1, the time group operation capacity A1 is received when the limit capacity mark position 1 is received, and the rest capacity A/2-A1 is redistributed to the machine group of which the limit capacity output mark is set to be 0.
c. If detecting that a plurality of modules of the system are all set to 1 [ limit capacity output mark ], the system still operates according to the current capacity distribution mode.
The limited capacity output zone bit refers to a total zone bit after the unit reaches other protection limits, and is used for forcibly limiting the unit output so as to avoid the unit from repeatedly generating the same problem protection.
(3) And if m is less than or equal to the minimum outdoor machine rated capacity B and less than or equal to n is less than or equal to the maximum outdoor machine rated capacity C, the unit is controlled according to the last time and enters the processing according to the maximum outdoor machine rated capacity C which is more than n for the first time.
The air handling unit can reasonably control the running states of two sets of systems according to the environmental working condition, the user requirement and the accumulated running time of the systems, so that the alternation is realized, and the problem of uneven load distribution of two-stage systems under the condition of nonstandard load when two-stage systems are simultaneously started is solved; and when the low-load single-stage system operates, the one-stage system is always started, so that the problem of unbalanced starting is solved, and the operation reliability of the whole machine is effectively improved.
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 the terms "first," "second," and the like in the description of the present invention 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 invention, 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 alternate implementations are included within the scope of the preferred embodiment of the present invention 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 invention.
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.
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 invention 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, 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 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 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 (8)
1. A two-stage system cooperative control method is characterized by comprising the following steps:
acquiring environmental working conditions and user demand information;
calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
determining the running states of the two sets of systems according to the capacity requirements of the units and the rated capacity of the outdoor unit of each set of systems;
controlling the two sets of systems to operate according to the operating state;
the determining the operating states of the two sets of systems according to the unit capacity requirement and the rated capacity of the outdoor unit of each set of systems comprises the following steps:
if the unit capacity requirement is smaller than a first specific multiple of the rated capacity of the minimum outdoor unit, respectively acquiring the accumulated operation time of the two sets of systems; determining the running states of the two sets of systems according to the accumulated running duration;
if the unit capacity requirement is larger than a second specific multiple of the rated capacity of the maximum outdoor unit, the two sets of systems are started simultaneously, and the initial distribution capacities of the two sets of systems are half of the unit capacity requirement;
if the capacity requirement of the unit is greater than or equal to a first specific multiple of the rated capacity of the minimum outdoor unit and less than or equal to a second specific multiple of the rated capacity of the maximum outdoor unit, and the unit is not operated for the first time, the two sets of systems keep the current operation state unchanged;
determining the operating states of the two sets of systems according to the accumulated operating duration comprises the following steps:
if the accumulated running time of the first set of system is longer than that of the second set of system, the second set of system is started; otherwise, the first set of system is started.
2. The dual-stage system coordinated control method according to claim 1, wherein the environmental conditions comprise:
the temperature or relative humidity of the dry and wet air inlet of the indoor unit.
3. The dual-stage system cooperative control method according to claim 1, further comprising:
when the capacity requirement of the unit is larger than or equal to a first specific multiple of the minimum outdoor unit rated capacity and smaller than or equal to a second specific multiple of the maximum outdoor unit rated capacity, and the unit is operated for the first time, two sets of systems are simultaneously started, and the initial distribution capacity of the two sets of systems is half of the capacity requirement of the unit.
4. The dual-stage system cooperative control method according to any one of claims 1 to 3, further comprising:
judging whether a module in the double-stage system sends out a capacity-limiting output signal or not;
when no module in the two-stage system sends out a capacity-limiting output signal, the two systems operate according to the initial distribution capacity, and the operation output of the unit is adjusted according to the difference between the actual outlet air temperature of the systems and the required outlet air temperature calculated by the distribution capacity;
when a certain module in the double-stage system sends out a capacity limiting output signal, acquiring the running capacity of the system where the module is located; and adjusting the distribution capacity of the other set of system to be the difference between the unit capacity requirement and the current operation capacity of the system where the module is located;
when a plurality of modules in the double-stage system send out capacity limiting output signals, the two sets of systems still operate according to the current capacity distribution mode.
5. A dual-stage system cooperative control apparatus, comprising:
the acquisition module is used for acquiring environmental working conditions and requirement information of a user;
the calculation module is used for calculating the unit capacity requirement according to the environment working condition and the requirement information of the user;
the determining module is used for determining the running states of the two sets of systems according to the capacity requirement of the unit and the rated capacity of the outdoor unit of each set of system;
and the control module is used for controlling the two sets of systems to operate according to the operation state.
6. A controller for performing the dual-stage system cooperative control method according to any one of claims 1 to 4.
7. An air handling unit, comprising:
a dual stage air treatment system, and the controller of claim 6;
the controller is connected with the dual-stage air treatment system.
8. The air handling unit of claim 7, wherein the air handling unit comprises: fresh air handling unit and air conditioning unit.
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