CN113251713B - Capability distribution method, device and system for module unit - Google Patents
Capability distribution method, device and system for module unit Download PDFInfo
- Publication number
- CN113251713B CN113251713B CN202110635350.5A CN202110635350A CN113251713B CN 113251713 B CN113251713 B CN 113251713B CN 202110635350 A CN202110635350 A CN 202110635350A CN 113251713 B CN113251713 B CN 113251713B
- Authority
- CN
- China
- Prior art keywords
- started
- compressor
- unit
- controlling
- output capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a capacity distribution method, a device and a system of a module unit, wherein the method comprises the following steps: acquiring historical operation information of compressors of each unit, and a constant flow demand and a variable flow demand; determining a target compressor to be started according to historical operation information, a constant flow demand and a variable flow demand, and controlling the target compressor to be started; when a loading demand exists, controlling a started compressor in the fixed frequency unit to increase the output capacity or controlling a compressor which is not started in the fixed frequency unit to start according to the loading demand, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the compressor which is not started in the variable frequency unit to start; when a load reduction demand exists, the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed according to the load reduction demand, and/or the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed. The technical scheme provided by the embodiment of the invention can improve the working efficiency and energy efficiency of the module unit.
Description
Technical Field
The embodiment of the invention relates to a refrigeration technology, in particular to a capacity distribution method, a capacity distribution device and a capacity distribution system for a module unit.
Background
For a refrigeration system such as a refrigeration system applied in the commercial field, the use of a module unit is becoming more and more widespread due to the large demand of a refrigeration space, and becomes an indispensable part of the refrigeration system. Along with the requirement on the refrigeration effect is higher and higher, the original module unit using the fixed-frequency compressor cannot meet the market demand, and the frequency converter unit using the variable-frequency compressor is more and more common.
At present, the existing capacity allocation method for a module unit generally allocates capacity only to a fixed-frequency unit or only to a frequency converter unit, and for a unit system with the fixed-frequency unit and the frequency converter unit, when the fixed-frequency unit and the frequency converter unit are used in a mixed manner, effective control over the working state and working frequency of a compressor of each unit is lacked, so that the working efficiency and energy efficiency of the module unit are affected.
Disclosure of Invention
The embodiment of the invention provides a capacity distribution method, device and system of a module unit, and aims to improve the working efficiency and energy efficiency of the module unit.
In a first aspect, an embodiment of the present invention provides a capacity allocation method for a module unit, including:
acquiring historical operation information of compressors of each unit, and a constant flow demand and a variable flow demand;
determining a target compressor to be started according to historical operation information, a fixed flow demand and a variable flow demand, and controlling the target compressor to be started;
when a loading demand exists, controlling a started compressor in the fixed frequency unit to increase the output capacity or controlling a compressor which is not started in the fixed frequency unit to start according to the loading demand, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the compressor which is not started in the variable frequency unit to start;
when a load reduction demand exists, the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed according to the load reduction demand, and/or the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed.
Optionally, controlling the started compressor in the fixed frequency unit to increase output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading requirement includes:
when the loading requirement of the fixed frequency unit is smaller than the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to increase the output capacity;
and when the loading requirement of the fixed frequency unit exceeds the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to start.
Optionally, controlling a started compressor in the inverter unit to increase output capacity or controlling a compressor not started in the inverter unit to start according to a loading requirement includes:
when the loading requirement of the frequency converter set is smaller than the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to increase the output capacity;
and when the loading requirement of the frequency converter set exceeds the residual output capacity of the started compressor in the frequency converter set, controlling the compressor which is not started in the frequency converter set to start.
Optionally, after controlling the compressor that is not started in the inverter group to start, the method further includes:
when the running time of at least two compressors of the frequency conversion unit reaches the preset time, adjusting the frequencies of the at least two compressors to the same frequency;
the frequency of at least two compressors is controlled to increase or decrease to the same extent.
Optionally, controlling the output reduction capacity or the shutdown of the started compressor in the frequency scheduling unit according to the load reduction requirement includes:
when the load reduction requirement of the fixed frequency unit is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to reduce the output capacity;
and when the load shedding requirement of the fixed frequency unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to be closed.
Optionally, controlling the started compressor in the inverter unit to reduce output capacity or close according to the load shedding requirement includes:
when the load shedding requirement of the frequency converter set is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the started compressors in the frequency converter set to reduce the output capacity;
and when the load shedding requirement of the frequency converter set exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the started compressors in the frequency converter set to be closed.
Optionally, determining a target compressor to be started according to the historical operation information, the constant flow demand and the variable flow demand, and controlling the target compressor to start includes:
when a variable flow demand exists, the number of compressors needing to be started by the frequency converter set is determined according to the historical operation information and the variable flow demand, the target compressor is controlled to be started, and the compressors of the frequency converter set which is abnormally operated and/or operated beyond the range are controlled to be started.
In a second aspect, an embodiment of the present invention further provides a capacity allocation apparatus for a module unit, including:
the information acquisition module is used for acquiring historical operation information of compressors of each unit and the constant flow demand and the variable flow demand;
the starting determining module is used for determining a target compressor to be started according to historical operation information, a constant flow demand and a variable flow demand and controlling the target compressor to be started;
the first control module is used for controlling the started compressor in the fixed frequency unit to increase the output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading requirement when the loading requirement exists, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the started compressor in the variable frequency unit to start;
and the second control module is used for controlling the started compressor in the frequency converter set to reduce the output capacity or close according to the load reduction requirement and/or controlling the started compressor in the frequency converter set to reduce the output capacity or close when the load reduction requirement exists.
In a third aspect, an embodiment of the present invention further provides a module unit system, including a fixed-frequency unit and a frequency converter unit, where the fixed-frequency unit and the frequency converter unit both include a controller and a compressor, and the controller is electrically connected to the compressor, and the fixed-frequency and frequency-conversion capability distribution device of the module unit according to the second aspect is integrated in the controller.
Optionally, the fixed-frequency unit and the variable-frequency unit both comprise at least two compressors.
According to the capacity distribution method, device and system of the module unit, provided by the embodiment of the invention, historical operation information of compressors of each unit and fixed flow demand and variable flow demand are obtained; determining a target compressor to be started according to historical operation information, a fixed flow demand and a variable flow demand, and controlling the target compressor to be started; when a loading demand exists, controlling the started compressor in the fixed frequency unit to increase the output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading demand, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the started compressor in the variable frequency unit to start; when a load reduction demand exists, the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed according to the load reduction demand, and/or the started compressor in the frequency converter set is controlled to reduce the output capacity or be closed. Compared with the existing mode of only carrying out capacity distribution on the fixed-frequency unit or only carrying out capacity distribution on the variable-frequency unit, the capacity distribution method, the capacity distribution device and the capacity distribution system of the modular unit provided by the embodiment of the invention carry out corresponding control on the compressor and/or the variable-frequency unit of the fixed-frequency unit according to the loading requirement or the unloading requirement, and when the fixed-frequency unit and the variable-frequency unit are used in a mixed mode, the effective control on the working state and the working frequency of the compressor of each unit is realized, so that the working efficiency and the energy efficiency of the modular unit are improved.
Drawings
Fig. 1 is a flowchart of a capacity allocation method for a module unit according to an embodiment of the present invention;
fig. 2 is a flowchart of a capacity allocation method for a module unit according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of start-stop and output capacity of a compressor according to a second embodiment of the present invention;
fig. 4 is a block diagram of a capacity allocation apparatus of a module unit according to a third embodiment of the present invention;
fig. 5 is a block diagram of a module unit system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a capacity allocation method for a module unit according to an embodiment of the present invention, where the method is applicable to aspects such as capacity allocation for the module unit, and the method may be executed by a capacity allocation apparatus for the module unit, where the apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in a controller of a module unit system having a capacity allocation function for the module unit, and the method specifically includes the following steps:
and step 110, acquiring historical operation information of compressors of each unit, and a constant flow demand and a variable flow demand.
The unit can comprise a fixed frequency unit and a frequency converter unit, and the historical operation information can comprise historical operation duration and historical fault information of the compressor. The historical operation information, the constant flow demand and the variable flow demand of each unit compressor can be stored in a storage module of a controller of the module unit system, and the capacity distribution device of the module unit can be electrically connected with the storage module so as to obtain the historical operation information, the constant flow demand and the variable flow demand of each unit compressor.
And step 120, determining a target compressor needing to be started according to the historical operation information, the constant flow demand and the variable flow demand, and controlling the target compressor to be started.
Specifically, taking the inverter unit as an example, when there is a variable flow demand, the number of compressors to be started by the inverter unit is determined according to the historical operation information and the variable flow demand, the target compressor is controlled to be started, and the compressors of the inverter unit which is abnormally operated and/or operated beyond the range are controlled to be started.
And step 130, when a loading demand exists, controlling the started compressor in the fixed frequency unit to increase the output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading demand, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the started compressor in the variable frequency unit to start.
For example, if the loading requirement of the fixed frequency unit is less than the residual output capacity of the started compressor in the fixed frequency unit, the started compressor in the fixed frequency unit can be controlled to increase the output capacity. And if the loading requirement of the frequency converter set exceeds the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to start.
And 140, when the load shedding demand exists, controlling the started compressor in the frequency converter set to reduce the output capacity or close according to the load shedding demand, and/or controlling the started compressor in the frequency converter set to reduce the output capacity or close.
For example, if the load reduction demand of the fixed-frequency unit is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed-frequency unit, the started compressors in the fixed-frequency unit can be controlled to reduce the output capacity. And if the load shedding requirement of the frequency converter set exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the compressor with the minimum current output capacity in the started compressors in the frequency converter set to be closed.
According to the capacity allocation method for the module unit, the compressor and/or the frequency converter unit of the fixed-frequency unit are/is correspondingly controlled according to the loading requirement or the unloading requirement, and when the fixed-frequency unit and the frequency converter unit are used in a mixed mode, the working state and the working frequency of the compressor of each unit are effectively controlled, so that the working efficiency and the energy efficiency of the module unit are improved.
Example two
Fig. 2 is a flowchart of a capacity allocation method for a module unit according to a second embodiment of the present invention, where the method is applicable to aspects such as capacity allocation for the module unit, and the method may be executed by a capacity allocation apparatus for the module unit, where the apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in a controller of a module unit system having a capacity allocation function for the module unit, and the method specifically includes the following steps:
and step 210, acquiring historical operation information of compressors of each unit, and a constant flow demand and a variable flow demand.
And step 220, when a variable flow demand exists, determining the number of compressors needing to be started by the frequency converter set according to the historical operation information and the variable flow demand, controlling the target compressor to be started, and controlling the compressors of the frequency converter set which is abnormally operated and/or operated beyond the range to be started.
Specifically, if the variable flow rate requirement is 50 and the maximum output capacity of the compressor of the inverter unit is 50, it is determined that one compressor of the inverter unit needs to be started, and the starting of the compressor with a short historical operation time can be controlled. If the variable flow rate requirement is 100 and the maximum output capacity of the compressor of the frequency conversion unit is 50, two compressors which need to be started by the frequency conversion unit can be determined, and the compressor with historical abnormal operation information or longer historical operation time can be controlled to be started, so that the current operation time of the compressor is shorter than the current operation time of other compressors, the operation intensity of the compressor is relieved to a certain extent, the compressor is prevented from being out of order due to overlong operation time, and the operation reliability of the unit is improved.
And step 230, when the loading requirement of the fixed frequency unit is smaller than the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to increase the output capacity.
Specifically, fig. 3 is a schematic diagram of start-stop and output capacities of a compressor according to a second embodiment of the present invention, and referring to fig. 3, taking a maximum output capacity of the compressor as 50 as an example, if one compressor has been started in a fixed-frequency unit, a remaining output capacity of the compressor is 20, and a loading requirement of the fixed-frequency unit is 10, the compressor is controlled to increase the output capacity, so as to meet the loading requirement of the fixed-frequency unit.
And 240, when the loading requirement of the fixed frequency unit exceeds the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to start.
Specifically, referring to fig. 3, taking the maximum output capacity of the compressor as 50 as an example, if one compressor has been started in the fixed-frequency unit, the remaining output capacity of the compressor is 10, and the loading requirement of the fixed-frequency unit is 50, the fixed-frequency unit is controlled to start another compressor, and the compressor started first is controlled to operate at the maximum output capacity, that is, the output capacity of the compressor started first is controlled to increase by 10, the remaining output capacity is controlled to decrease to 0, and the output capacity of the compressor started later is controlled to increase from 0 to 40, so as to meet the loading requirement.
And 250, when the loading requirement of the frequency converter set is smaller than the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to increase the output capacity.
The specific process of controlling the started compressor in the inverter unit to increase the output capacity may refer to the process of controlling the started compressor in the inverter unit to increase the output capacity, and is not described herein again.
And step 260, when the loading requirement of the frequency converter set exceeds the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to start.
Specifically, the specific process of controlling the start of the compressor that is not started in the inverter group may refer to the process of controlling the start of the compressor that is not started in the inverter group. After the compressors which are not started in the frequency converter set are controlled to be started, when the running time of at least two compressors of the frequency converter set reaches a preset time, such as one minute, the frequencies of the at least two compressors are adjusted to be the same, such as 50HZ; the frequency of at least two compressors is controlled to increase or decrease in the same degree, so that the started compressors in the frequency converter set can work at the same frequency, and the frequency of the started compressors in the frequency converter set can be adjusted to be optimal uniformly.
And 270, when the load shedding requirement of the fixed frequency unit is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to reduce the output capacity.
Specifically, taking the maximum output capacity 50 of the compressor as an example, if two compressors have been started in the fixed-frequency unit, the current output capacity of the compressor with the smallest current output capacity in the two compressors is 30, and the load shedding requirement of the fixed-frequency unit is 20, the compressor can be controlled to reduce the output capacity to achieve the load shedding requirement.
And step 280, when the deloading requirement of the fixed frequency unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to be closed.
Specifically, taking the maximum output capacity 50 of the compressor as an example, if two compressors are started in the fixed-frequency unit, the current output capacity of the compressor with the minimum current output capacity in the two compressors is 30, and the load shedding requirement of the fixed-frequency unit is 50, the compressor can be controlled to be turned off, and the output capacity of the other started compressor is controlled to be reduced by 20, so as to achieve the load shedding requirement.
And 290, when the load shedding requirement of the frequency converter set is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the started compressors in the frequency converter set to reduce the output capacity.
The specific process of controlling the started compressor in the inverter group to reduce the output capacity may refer to the process of controlling the started compressor in the inverter group to reduce the output capacity, and is not described herein again.
And 291, controlling the started compressor in the frequency converter unit to be closed when the load shedding requirement of the frequency converter unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter unit.
According to the capacity distribution method of the module unit, the compressor and/or the frequency converter unit of the fixed-frequency unit are/is correspondingly controlled according to the loading requirement or the unloading requirement, and when the fixed-frequency unit and the frequency converter unit are used in a mixed mode, the working state and the working frequency of the compressor of each unit are effectively controlled, so that the working efficiency and the energy efficiency of the module unit are improved.
EXAMPLE III
Fig. 4 is a block diagram of a capacity allocation apparatus of a module unit according to a third embodiment of the present invention, where the capacity allocation apparatus of the module unit includes: an information acquisition module 310, a start determination module 320, a first control module 330, and a second control module 340; the information obtaining module 310 is configured to obtain historical operation information of each unit compressor, and a constant flow demand and a variable flow demand; the starting determining module 320 is configured to determine a target compressor to be started according to the historical operation information, the constant flow demand and the variable flow demand, and control the target compressor to be started; the first control module 330 is configured to, when a loading demand exists, control a started compressor in the fixed-frequency unit to increase output capacity or control a compressor not started in the fixed-frequency unit to start according to the loading demand, and/or control a started compressor in the variable-frequency unit to increase output capacity or control a compressor not started in the variable-frequency unit to start; the second control module 340 is configured to control the started compressors in the frequency converter set to reduce output capacity or to be turned off according to the load shedding requirement and/or control the started compressors in the frequency converter set to reduce output capacity or to be turned off when there is a load shedding requirement.
On the basis of the above embodiment, the first control module 330 includes a first control unit and a second control unit, where the first control unit is configured to control the started compressor in the fixed frequency unit to increase the output capacity when the loading demand of the fixed frequency unit is less than the remaining output capacity of the started compressor in the fixed frequency unit; the second control unit is used for controlling the compressors which are not started in the fixed frequency unit to be started when the loading requirement of the fixed frequency unit exceeds the residual output capacity of the started compressors in the fixed frequency unit.
Optionally, the first control module 330 includes a third control unit and a fourth control unit, where the third control unit is configured to control the started compressor in the inverter unit to increase the output capacity when the loading demand of the inverter unit is smaller than the remaining output capacity of the started compressor in the inverter unit; and the fourth control unit is used for controlling the compressors which are not started in the frequency converter unit to start when the loading requirement of the frequency converter unit exceeds the residual output capacity of the started compressors in the frequency converter unit.
Preferably, the first control module 330 further includes a first frequency adjusting unit and a second frequency adjusting unit, where the first frequency adjusting unit is configured to adjust the frequencies of at least two compressors of the inverter group to the same frequency when the operating durations of the at least two compressors reach the preset duration; the second frequency adjustment unit is used for controlling the frequencies of at least two compressors to increase or decrease to the same degree.
In one embodiment, the second control module 340 includes a fifth control unit and a sixth control unit, the fifth control unit is configured to control the activated compressors in the fixed frequency unit to decrease the output capacity when the load reduction demand of the fixed frequency unit is less than the current output capacity of the compressor with the smallest current output capacity among the activated compressors in the fixed frequency unit; the sixth control unit is used for controlling the started compressor in the fixed frequency unit to be closed when the load shedding demand of the fixed frequency unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit.
Optionally, the second control module 340 includes a seventh control unit and an eighth control unit, where the seventh control unit is configured to control the started compressor in the inverter unit to reduce the output capacity when the load shedding demand of the inverter unit is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the inverter unit; and the eighth control unit is used for controlling the started compressor in the frequency converter unit to be closed when the load shedding requirement of the frequency converter unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter unit.
Optionally, the start determining module 320 includes a start control unit, and the start control unit is configured to determine, according to the historical operation information and the variable flow demand, the number of compressors that the inverter unit needs to be started, control the start of a target compressor, and control the start of compressors of the inverter unit that is abnormally operated and/or operated beyond a range.
The capacity allocation device for a module unit provided in this embodiment and the capacity allocation method for a module unit provided in any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects, and detailed technical details in this embodiment are not described in the capacity allocation method for a module unit provided in any embodiment of the present invention.
Fig. 5 is a block diagram of a module unit system according to a third embodiment of the present invention, where the module unit system includes a capability allocation device of the module unit according to any embodiment of the present invention, and further includes a fixed frequency unit 10 and a frequency converter unit 20, and the capability allocation device is used to correspondingly control the frequency converter unit and the fixed frequency unit.
Wherein, the fixed frequency unit 10 and the frequency converter unit 20 can be respectively provided with a plurality of units. The fixed frequency unit 10 and the variable frequency unit 20 may each include a controller and a compressor, and the controller is electrically connected to the compressor. Fig. 5 illustrates a fixed-frequency unit 10 and a variable-frequency unit 20, and the number of the fixed-frequency unit 10 and the variable-frequency unit 20 can be specifically set according to actual situations. The controller 11 of the fixed frequency unit 10 is electrically connected to the compressor 12 of the fixed frequency unit 10, and the controller 21 of the inverter unit 20 is electrically connected to the compressor 22 of the inverter unit 20. The modular unit system may further include a main controller 30, the controller 11 of the fixed frequency unit 10 and the controller 21 of the variable frequency unit 20 are electrically connected to the main controller 30, and the capacity allocation device may be integrated in the main controller 30. The main controller 30 may send a command for controlling the fixed-frequency unit 10 to the controller 11 of the fixed-frequency unit 10, and send a command for controlling the inverter unit 20 to the controller 21 of the inverter unit 20, so as to control the compressor 12 of the fixed-frequency unit 10 and the compressor 22 of the inverter unit 20, respectively.
Optionally, the fixed-frequency unit 10 and the variable-frequency unit 20 each include at least two compressors.
Specifically, taking the inverter assembly 20 including two compressors 22 as an example, when the output capacity of one compressor 22 cannot meet the loading requirement, the other compressor 22 may be started to meet the loading requirement. The specific number of compressors of each unit can be set according to actual conditions, and is not limited herein.
The module unit system provided by this embodiment and the method for allocating capacity of the module unit provided by any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects, and detailed technical details in this embodiment are not described in the method for allocating capacity of the module unit provided by any embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. A capacity allocation method for a module unit is characterized by comprising the following steps:
acquiring historical operation information of compressors of each unit, and a constant flow demand and a variable flow demand;
determining a target compressor to be started according to the historical operation information, the constant flow demand and the variable flow demand, and controlling the target compressor to be started;
when a loading demand exists, controlling the started compressor in the fixed frequency unit to increase the output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading demand, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the started compressor in the variable frequency unit to start;
when a load reduction demand exists, controlling the started compressor in the fixed frequency unit to reduce the output capacity or close the compressor according to the load reduction demand, and/or controlling the started compressor in the variable frequency unit to reduce the output capacity or close the compressor;
the determining a target compressor needing to be started according to the historical operation information, the constant flow demand and the variable flow demand, and controlling the target compressor to be started comprises the following steps:
when a variable flow demand exists, determining the number of compressors to be started by the frequency converter set according to the historical operation information and the variable flow demand, controlling the starting of a target compressor, and controlling the starting of the compressors of the frequency converter set which is abnormally operated and/or operated beyond the range;
the historical operation information includes historical operation time length and historical fault information of the compressor.
2. The capacity allocation method for the module unit according to claim 1, wherein the controlling of the started compressors in the fixed frequency unit to increase the output capacity or the controlling of the started compressors in the fixed frequency unit to start according to the loading requirement comprises:
when the loading requirement of the fixed frequency unit is smaller than the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to increase the output capacity;
and when the loading requirement of the fixed frequency unit exceeds the residual output capacity of the started compressor in the fixed frequency unit, controlling the started compressor in the fixed frequency unit to start.
3. The capacity allocation method for the module unit according to claim 1, wherein the controlling of the started compressors in the inverter unit to increase the output capacity or controlling of the un-started compressors in the inverter unit to start according to the loading demand comprises:
when the loading requirement of the frequency converter set is smaller than the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to increase the output capacity;
and when the loading requirement of the frequency converter set exceeds the residual output capacity of the started compressor in the frequency converter set, controlling the started compressor in the frequency converter set to start.
4. The capacity allocation method for the module unit according to claim 3, wherein after controlling the compressor in the inverter unit that is not started to start, the method further comprises:
when the running time of at least two compressors of the frequency conversion unit reaches a preset time, adjusting the frequencies of the at least two compressors to the same frequency;
controlling the frequency of the at least two compressors to increase by the same degree or decrease by the same degree.
5. The capacity allocation method for a module group according to claim 1, wherein the controlling the compressors started in the fixed frequency group to reduce the output capacity or shut down according to the load reduction demand comprises:
when the load shedding requirement of the fixed frequency unit is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to reduce the output capacity;
and when the load shedding requirement of the fixed frequency unit exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the fixed frequency unit, controlling the started compressors in the fixed frequency unit to be closed.
6. The capacity allocation method for the module unit according to claim 1, wherein the controlling of the started compressors in the inverter unit to reduce the output capacity or shut down according to the load reduction demand comprises:
when the load shedding requirement of the frequency converter set is smaller than the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the started compressors in the frequency converter set to reduce the output capacity;
and when the load shedding requirement of the frequency converter set exceeds the current output capacity of the compressor with the minimum current output capacity in the started compressors in the frequency converter set, controlling the started compressors in the frequency converter set to be closed.
7. A capacity distribution apparatus for a modular unit, comprising:
the information acquisition module is used for acquiring historical operation information of compressors of each unit and the constant flow demand and the variable flow demand;
the starting determining module is used for determining a target compressor to be started according to the historical operation information, the constant flow demand and the variable flow demand and controlling the target compressor to be started;
the first control module is used for controlling the started compressor in the fixed frequency unit to increase the output capacity or controlling the started compressor in the fixed frequency unit to start according to the loading requirement when the loading requirement exists, and/or controlling the started compressor in the variable frequency unit to increase the output capacity or controlling the started compressor in the variable frequency unit to start;
the second control module is used for controlling the started compressor in the fixed frequency unit to reduce the output capacity or close the started compressor in the fixed frequency unit and/or controlling the started compressor in the variable frequency unit to reduce the output capacity or close the started compressor in the variable frequency unit when load shedding needs exist;
the starting determining module comprises a starting control unit, and the starting control unit is used for determining the number of compressors to be started by the frequency converter set according to the historical operation information and the variable flow demand when the variable flow demand exists, controlling the starting of a target compressor, and controlling the starting of the compressors of the frequency converter set which is abnormally operated and/or operated beyond the range;
the historical operation information includes historical operation time length and historical failure information of the compressor.
8. A modular unit system, comprising the capacity allocation device of the modular unit as claimed in claim 7, and further comprising a fixed frequency unit and a variable frequency unit, wherein the capacity allocation device is configured to control the variable frequency unit and the fixed frequency unit accordingly.
9. The modular unit system according to claim 8, wherein the fixed frequency unit and the variable frequency unit each comprise at least two compressors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635350.5A CN113251713B (en) | 2021-06-08 | 2021-06-08 | Capability distribution method, device and system for module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635350.5A CN113251713B (en) | 2021-06-08 | 2021-06-08 | Capability distribution method, device and system for module unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113251713A CN113251713A (en) | 2021-08-13 |
| CN113251713B true CN113251713B (en) | 2022-12-16 |
Family
ID=77186942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110635350.5A Active CN113251713B (en) | 2021-06-08 | 2021-06-08 | Capability distribution method, device and system for module unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113251713B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876475A (en) * | 2010-05-28 | 2010-11-03 | 深圳和而泰智能控制股份有限公司 | Method and system for controlling central air-conditioning |
| CN106196783B (en) * | 2016-06-28 | 2020-02-28 | 青岛海尔空调电子有限公司 | Control method and control device of module unit and module unit |
| CN108224702B (en) * | 2017-12-18 | 2020-08-18 | 青岛海尔空调电子有限公司 | Control method and device for central air-conditioning system |
| CN109237708A (en) * | 2018-08-28 | 2019-01-18 | 青岛海尔空调电子有限公司 | Control method for air-conditioner set |
-
2021
- 2021-06-08 CN CN202110635350.5A patent/CN113251713B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113251713A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3376128B1 (en) | Control structure of an air-conditioning system and control method of the same | |
| AU2010361822B2 (en) | Power conversion device and refrigeration air-conditioning device | |
| EP2030313B1 (en) | Ride-through method and system for hvac&r chillers | |
| TWI450482B (en) | A power converter system that operates efficiently over a range of load conditions | |
| US20070005195A1 (en) | Distributed energy storage for reducing power demand | |
| CN107289577B (en) | Control method and control system of generator power supply air conditioner and air conditioner | |
| CN111725879A (en) | Light-storage combined power supply mobile energy storage system and control method thereof | |
| US20190058426A1 (en) | System and method for operating a pumped storage power plant with a double fed induction machine | |
| CN114567017A (en) | Power supply and distribution method and device for data center and computer storage medium | |
| CN113251713B (en) | Capability distribution method, device and system for module unit | |
| EP3779301A1 (en) | Method and device for controlling capacity change of compressor, and smart home appliance | |
| CN117404761A (en) | Modularized air conditioning unit and control method and control device thereof | |
| EP3567691B1 (en) | Composite power storage system and power storage method | |
| CN112780538B (en) | Variable frequency electric appliance, variable frequency controller and control method thereof | |
| WO2007030176A1 (en) | Ride-through method and system for hvac&r chillers | |
| JP2023019166A (en) | Charge/discharge control device and charge/discharge control program | |
| CN113959069A (en) | Air conditioning system | |
| CN106451740A (en) | Distribution equipment and distribution method of air-conditioning power supply and air-conditioner | |
| CN112383233A (en) | Self-adaptive carrier frequency control method and self-adaptive carrier frequency control circuit | |
| US20210229529A1 (en) | Transportation refrigeration device, power management system and power management method | |
| CN110906501A (en) | Control method and system and air conditioner | |
| CN113915112B (en) | Unit variable frequency compressor control method and device and condensing unit | |
| CN107504623B (en) | Control method and system for water flow of air conditioning unit | |
| CN113266923B (en) | Control method and control device of compressor | |
| CN117704676A (en) | Control method, device, equipment and medium of variable-frequency air source heat pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |