CN114396709A - Multi-module air conditioning system, control method thereof and storage medium - Google Patents
Multi-module air conditioning system, control method thereof and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention discloses a multi-module air conditioning system and a control method thereof, wherein the multi-module air conditioning system comprises the following steps: in the initial running state of the whole machine, the modules meeting the natural cooling starting condition are all started according to the address sequence preferentially, and then the modules meeting the compressor starting condition are started according to the address sequence; in the energy-saving dispatching control after the whole machine operates in the initial state, the natural cooling operation and/or the compressor operation of each module are controlled according to the natural cooling on/off condition, the compressor on/off condition, the water temperature loading condition/unloading condition and the module operation state. Under the partial load operation, the operation state of each module unit is balanced by identifying the operation parameters of each module, so that the service life of the whole machine is prevented from being shortened; meanwhile, the advantages of natural cooling are utilized to the maximum extent through judgment of relevant parameter conditions, and the operation energy efficiency is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-module air conditioner system, a control method and a storage medium thereof.
Background
The air-cooled water chilling unit with the natural cooling function has the advantage of obviously improving the energy efficiency when the ambient temperature is lower, and is more applied to the fields of data centers, industrial cooling and the like in recent years. Generally, a unit with large cooling capacity (such as more than 800 kW) adopts a modular design, namely, one set of control system drives a plurality of cold water modules, the refrigeration cycles of each module are mutually independent, the control and scheduling of the plurality of modules are relatively simple for a common compressor system, products in the current market also have a mature scheme, but for an air-cooled water chiller with a natural cooling component, the simplest double-module unit is taken as an example, two sets of compressor refrigeration cycles and two sets of natural cooling cycles exist, on the premise of ensuring the requirement of the cooling capacity of a user, how to match the control and scheduling can realize the energy-saving effect to the maximum extent, and the technical problems of low operation energy efficiency, short service life and the like caused by unbalanced scheduling and control among modules of the multi-module natural cooling water chiller are avoided.
Disclosure of Invention
The invention provides a multi-module air conditioning system, a control method and a storage medium thereof, which aim to solve the technical problems of low operation energy efficiency, short service life of the whole machine and the like caused by unbalanced dispatching control among modules of a multi-module natural cooling water chilling unit.
The control method of the multi-module air conditioning system provided by the invention comprises the following steps:
in the initial running state of the whole machine, the modules meeting the natural cooling starting condition are all started according to the address sequence preferentially, and then the modules meeting the compressor starting condition are started according to the address sequence;
and in the energy-saving dispatching control after the whole machine operates in the initial state, controlling the natural cooling operation and/or the compressor operation of each module according to the natural cooling on/off condition, the compressor on/off condition, the water temperature loading/unloading condition and the operation state of the module.
In the initial running state of the whole machine:
when the natural cooling starting condition is met, starting natural cooling operation in sequence according to the address sequence of each module, and keeping the compressor closed;
and when the natural cooling starting condition is not met, starting the compressors to operate in sequence according to the address sequence of each module, and keeping the natural cooling closed.
The opening interval time of each module is T1, and if the outlet water temperature Tout reaches the outlet water target temperature Tog in the opening process, the rest modules are not opened any more and are kept closed.
Executing the following steps in the energy-saving scheduling control:
(a) judging whether each module meets the natural cooling starting condition, if not, executing the step (b); if yes, further judging whether the running state values of all the modules are less than or equal to 1, and if not, executing the step (b); if yes, sequentially starting natural cooling operation of the corresponding modules according to the module address sequence, and then returning to the step (a);
(b) judging whether each module meets the natural cooling closing condition, if not, executing the step (c), if so, further judging whether the running state values of all the modules are larger than 1, and if not, executing the step (c); if yes, closing the natural cooling operation of the modules meeting the conditions in sequence according to the address sequence, and then returning to the step (a);
(c) judging whether the closing condition of the compressor is met, if not, executing the step (d), if so, further judging whether the running state value of each module is an odd number, and if not, executing the step (d); if so,thenSequentially closing the compressors of the corresponding modules according to the address sequence, further judging whether the water temperature loading condition is met, if so, sequentially starting the natural cooling operation of the modules according to the module address sequence, and then returning to the step (a); if not, returning to the step (a);
(d) detecting whether a compressor starting condition is met, if not, executing the step (e), if so, further judging whether a water temperature loading condition is met and the running state values of all modules are more than or equal to 2, if so, sequentially starting the compressors meeting the condition modules according to the module address sequence, and then returning to the step (a); if not, executing the step (e);
(e) judging whether a module pair with one module being 0 and the other module being 3 exists in the running state values of all the modules, if so, switching the running state of the module with the running state value of 0 into the running state with the running state value of 2 according to the module address sequence, and then returning to the step (a); if not, executing the step (f);
(f) judging whether the total number of the modules with the running state value of 3 is more than or equal to the total number of the modules with the running state values of 0 and 1, if so, sequentially switching the modules with the running state value of 3 into the modules with the running state value of 2 to run according to the module address sequence, and then returning to the step (a); if not, directly returning to the step (a).
In the above operation state switching, only one module is switched at a time, and the interval T2 is switched at a time.
The natural cooling is started under the following conditions: the difference delta T between the inlet water temperature Tin and the environment temperature Tenv is larger than a set value Tzs; the natural cooling shut-off conditions are: the difference delta T between the inlet water temperature Tin and the ambient temperature Tenv is less than or equal to the set value Tzs-T.
The compressor off conditions are: the difference delta T between the inlet water temperature Tin and the environment temperature Tenv is less than or equal to a set limit temperature difference Tjx; the compressor starting conditions are as follows: the difference delta T between the inlet water temperature Tin and the ambient temperature Tenv is larger than the set limit temperature difference Tjx + T.
The water temperature loading conditions are as follows: the outlet water temperature Tout is more than or equal to the sum of the water outlet target temperature Tog and the water temperature control precision dT; the water temperature unloading conditions are: the outlet water temperature Tout is smaller than the difference between the outlet water target temperature Tog and the water temperature control accuracy dT.
The present invention also provides a storage medium containing computer-executable instructions for a control method of the above multi-module air conditioning system when executed by a computer processor.
The invention also provides a multi-module air conditioning system, and the multi-module air conditioning system adopts the control method.
Compared with the prior art, the invention has the following beneficial effects:
1. under the operation of partial load, the operation parameters of each module are identified to carry out overall scheduling control, so that the operation state of each module unit is balanced, and the service life of the whole machine is prevented from being shortened due to long-time and heavy-load operation of part of modules;
2. and the operation energy efficiency is improved by utilizing the advantage of natural cooling to the maximum extent through judging relevant parameter conditions.
Drawings
The invention is described in detail below with reference to the following figures and specific examples, wherein:
FIG. 1 is a system diagram of a chiller single module with a natural cold zone;
FIG. 2 is a schematic diagram of a multi-module control system of the present invention;
FIG. 3 is a flow chart of the multi-module energy-saving scheduling control of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1, a water chiller module with a natural cooling area includes a compression refrigeration cycle and a natural cooling cycle. The compression refrigeration cycle is composed of a compressor 1, an air-cooled condenser 2, a throttling device 3 and an evaporator 4. The natural cooling circulation consists of a heat exchanger 5, a circulating pump 6 and an air cooler 7. When the water chilling unit operates, chilled water exchanging heat with the evaporator 4 provides cooling capacity for a user. When the ambient temperature is low enough, the secondary refrigerant in the natural cooling circulation exchanges heat with ambient air in the air cooler 7 to reduce the temperature, then exchanges heat with water in the freezing water pipeline through the heat exchanger 5, the cooled water provides cold energy for the user side, and at the moment, the compressor is not started.
For a unit with large cooling capacity, a multi-module design is generally adopted, namely, a set of control system drives a plurality of modules, and each module is provided with a natural cooling cycle and a compression cooling cycle. The control method provided by the invention is to collocate and control the operation of each module on the premise of ensuring the requirement of the user on the cold quantity so as to realize the energy-saving effect to the maximum extent.
As shown in fig. 2, the multi-module control system provided by the present invention includes a dispatch control center and N parallel cooling water chiller modules communicating with the dispatch control center, each of which includes a compressor refrigeration cycle and a natural cooling cycle. The invention provides a control method of a multi-module air-cooled water chilling unit, which establishes a set of multi-module control scheme by taking required cold output as a basis and energy efficiency optimization as a control target, and effectively schedules and controls an operation load when the whole unit is in partial load operation.
The control method of the multi-module air conditioning system provided by the invention comprises the following steps: the control of the initial running state of the whole machine and the energy-saving dispatching control after the whole machine runs in the initial state. In the initial running state of the whole machine, the modules meeting the natural cooling starting condition are all started from low to high according to the address sequence, and then the modules meeting the compressor starting condition are started from low to high according to the address sequence; in the energy-saving dispatching control after the whole machine operates in the initial state, the natural cooling operation and/or the compressor operation of each module are controlled according to the natural cooling on/off condition, the compressor on/off condition, the water temperature loading condition/unloading condition and the operation state of the module.
The invention firstly defines some whole machine operation parameters and judgment conditions.
The whole machine operation parameters comprise: the system comprises a cold machine inlet water temperature Tin, a cold machine outlet water temperature Tout, an ambient temperature Tenv, a cold machine target outlet water temperature Tog and operation state states of modules, wherein the state1 represents the operation state of the module 1, the state2 represents the operation state of the module 2, and. The operation state value can be divided into four levels, wherein 0 represents the compressor closing and natural cooling closing state, 1 represents the compressor opening and natural cooling closing state, 2 represents the compressor closing and natural cooling opening state, and 3 represents the compressor opening and natural cooling opening state.
The judgment conditions include:
(1) setting a natural cooling opening condition and a natural cooling closing condition:
setting the difference value between the water inlet temperature Tin and the environment temperature Tenv as delta T, wherein delta T = Tin-Tenv;
setting the natural cooling starting conditions as follows: δ T > Tzs, and natural cooling shut-off conditions are as follows: delta T is less than Tzs-T, T in the embodiment is 3 ℃, Tzs is set according to actual designs of different units, and the suggested value range is 5-8 ℃.
(2) Setting a compressor on condition and a compressor off condition:
when the configuration of the water chilling unit is consistent with the water flow of a user side, the output refrigerating capacity during natural cooling operation is only related to the difference value delta T, a limit temperature difference value Tjx is set, the value can be measured through a laboratory, and the refrigerating capacity obtained through natural cooling can be equivalent to the nominal refrigerating capacity of the water chilling unit when the delta T = Tjx, namely, the compressor can be turned off at the moment, and the natural cooling is completely used for providing refrigeration.
The compressor shutdown conditions were: delta T is less than or equal to Tjx, and the starting condition of the compressor is as follows: Δ T > Tjx + T, in this example, T is 3 ℃.
(3) Setting water temperature loading conditions and water temperature unloading conditions:
the water temperature loading conditions are as follows: the outlet water temperature Tout is more than or equal to (Tog + dT), and the cold output of the unit is increased at the moment; the water temperature unloading conditions are as follows: the outlet water temperature Tout < (Tog-dT) needs the unit to reduce the cold output. Tog is the target outlet water temperature of the refrigerator, dT is the water temperature control precision, and the value range of dT is generally 0.1-1 ℃.
The control method of the multi-module air conditioning system provided by the invention comprises the following steps: the control of the initial running state of the whole machine and the energy-saving scheduling control of the whole machine after running for delta t time in the initial state.
(1) Control of initial running state of complete machine
When the natural cooling starting condition is met, the natural cooling is started in sequence according to the sequence of the module 1, the module 2, the module … and the module N, the compressor is kept to be closed, meanwhile, the starting interval time of each module is T1, the value range of T1 is 30-60 seconds, and if the outlet water temperature Tout reaches the outlet water target temperature Tog in the starting process, the rest modules are not started any more and are kept to be closed;
when the natural cooling starting condition is not met, the compressors are sequentially started according to the sequence of the module 1, the module 2, the module … and the module N, natural cooling is kept to be closed, meanwhile, the starting interval time of each module is T1, the value range of T1 is 30-60 seconds, and if the outlet water temperature Tout reaches the outlet water target temperature Tog in the starting process, the rest modules are not started any more and are kept to be closed.
After the modules meeting the natural cooling starting condition are all started preferentially by the control, the modules not meeting the natural cooling starting condition are started in the sequence from the low address to the high address of the modules, and each module independently judges whether the natural cooling starting condition is met, for example, 4 modules are provided, wherein the module 1 and the module 3 meet the natural cooling starting condition, but the module 2 and the module 4 are not met, the natural cooling operation is started in sequence according to the sequence of the module 1 and the module 3, and the compressor operation is started in sequence according to the sequence of the module 2 and the module 4.
(2) And the whole machine enters energy-saving scheduling control after running for delta t time in an initial state, the delta t is recommended to be at least 60 seconds, and timing is started by a module N or the water outlet temperature Tout reaches the water outlet target temperature Tog.
As shown in fig. 3, the energy-saving scheduling control is as follows:
firstly, collecting the operation parameters of the whole machine, including the inlet water temperature Tin, the outlet water temperature Tout, the environment temperature Tenv and the outlet water target temperature Tog, and the operation state1, state 2.
Step (a), detecting whether each module meets a natural cooling starting condition, wherein delta T is larger than Tzs, if yes, entering the following judgment operation: detecting the operation states 1-stateN of each module, if the operation state value is not more than 1, sequentially starting the natural cooling operation of the corresponding modules according to the sequence of the module addresses from low to high, unloading or closing all the module compressors according to the water temperature, then re-detecting the operation parameters of the whole machine, and returning to the step (a); if not, go to step (b).
Satisfying the natural cooling start condition shows that the natural cooling start energy efficiency is better than the compressor refrigeration, therefore open natural cooling as much as possible, after the natural cooling is started, the cold output is increased, the compressor unloads according to the water temperature, reduces the compressor operation load.
(b) Detecting whether a natural cooling closing condition is met, wherein delta T is less than Tzs-T, T is 3 ℃ in the embodiment, and if yes, entering the following judgment operation: detecting the running state value of each module, if the running state value is greater than 1, closing the natural cooling of the corresponding module, loading or opening all the module compressors according to the water temperature, then re-detecting the running parameters of the whole machine, and returning to the step (a); if not, go to step (c).
Satisfying the natural cooling off condition shows that the efficiency of the on-state natural cooling is inferior to the compressor refrigeration, at this time, the natural cooling is turned off in sequence, and the compressor is used for refrigeration.
(c) Detecting whether a compressor closing condition is met, wherein delta T is less than or equal to Tjx, and if not, turning to the step (d); if yes, the following judgment operation is carried out: detecting the operation states 1-stateN of each module, if the operation state value is odd, closing the corresponding module compressor, further judging whether the water temperature loading condition is met, if so, naturally cooling each module, sequentially starting (keeping starting after starting) according to the sequence of module addresses from low to high, and then returning to the step (a); if not, directly returning to the step (a).
The lower the ambient temperature is, the higher the natural cooling capacity and energy efficiency are, when the compressor closing condition is met, the requirement of the user on the refrigerating capacity can be met only by natural cooling, the compressor refrigeration is not needed at the moment, the refrigerating energy efficiency is improved, the reliability problem of the low-temperature operation refrigeration of the compressor is also avoided, and the compressors of the modules are closed one by one at the moment.
(d) Detecting whether a compressor starting condition is met, wherein delta T is greater than Tjx +3, and if not, turning to the step (e); if yes, the following judgment operation is carried out: and (4) detecting the operation states 1-stateN of each module, judging whether the operation state values of all the modules are greater than 2 and meet the water temperature loading condition, if not, keeping the corresponding module compressor closed, turning to the step (e), if so, sequentially starting the compressors of the modules meeting all the conditions according to the sequence of addresses from low to high, and then returning to the step (a).
When the starting condition of the compressor is met, the requirement of the full-load operation capacity of a user can not be met only by natural cooling, at the moment, as long as the condition that the natural cooling of each module is started and the water temperature loading condition is met is detected, the fact that the full-load operation of the natural cooling is started cannot meet the requirement of cooling capacity is meant, and the compressor is required to be started in sequence according to the module address.
(e) Detecting the running state of each module, judging whether 0-3 pairs exist in the running state values of all the modules (namely, the running state value of one module is 0 and the running state value of one module is 3), if so, switching the module with the running state value of 0 into the state with the running state value of 2, and then returning to the step (a); if not, go to step (f).
When the running state value is 0-3, the situation that some modules of the whole machine are in a complete idle state and some modules are in a full output state is shown, the natural cooling running of the current module is started, so that the environment temperature is favorable for starting the natural cooling, the idle modules are naturally cooled and started, and other modules automatically control the unloading or closing of the compressor according to the water temperature.
(f) Detecting the operation states 1-stateN, judging whether the total number of modules with the operation state value of 3 is more than or equal to the total number of modules with the operation state values of 0 and 1, if not, returning to the step (a); if yes, and the water temperature loading condition is not met, the modules with the operation state value of 3 are switched to the state with the operation state value of 2 according to the sequence of the module addresses from low to high, and then the step (a) is returned.
The total number of the modules with the operation state value of 3 is more than or equal to the total number of the modules with the operation state values of 0 and 1, which shows that the natural cooling is favorably started currently, but some modules do not utilize the natural cooling, the modules with the operation state value of 3 are switched into the state with the operation state value of 2, the cold output of the whole machine is reduced, and the modules with the operation state values of 0 or 1 are forced to be converted into the modules with the operation state values of 2 or 3.
When the running state is switched according to the conditions, only one module is switched each time, the interval T2 and the interval T2 are taken for 5-10min each time, and then all the conditions are detected again for judgment.
According to the control method provided by the invention, under the partial load operation, the operation parameters of each module are identified, the overall scheduling control is carried out, the operation state of each module unit is balanced, and the service life of the whole machine is prevented from being shortened due to long-time and heavy-load operation of part of modules; meanwhile, the operation energy efficiency is improved by utilizing the advantage of natural cooling to the maximum extent through judgment of related parameter conditions.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of a multi-module air conditioning system is characterized by comprising the following steps:
in the initial running state of the whole machine, the modules meeting the natural cooling starting condition are all started according to the address sequence preferentially, and then the modules meeting the compressor starting condition are started according to the address sequence;
and in the energy-saving dispatching control after the whole machine operates in the initial state, controlling the natural cooling operation and/or the compressor operation of each module according to the natural cooling on/off condition, the compressor on/off condition, the water temperature loading/unloading condition and the operation state of the module.
2. The control method according to claim 1, characterized in that in the complete machine initial operation state:
when the natural cooling starting condition is met, starting natural cooling operation in sequence according to the address sequence of each module, and keeping the compressor closed;
and when the natural cooling starting condition is not met, starting the compressors to operate in sequence according to the address sequence of each module, and keeping the natural cooling closed.
3. The control method of claim 2, wherein the time interval between the opening of each module is T1, and if the leaving water temperature Tout reaches the leaving water target temperature Tog during the opening process, the remaining modules are not opened and kept closed.
4. The control method according to claim 1, characterized in that the following steps are performed in the energy-saving scheduling control:
(a) judging whether each module meets the natural cooling starting condition, if not, executing the step (b); if yes, further judging whether the running state values of all the modules are less than or equal to 1, and if not, executing the step (b); if yes, sequentially starting natural cooling operation of the corresponding modules according to the module address sequence, and then returning to the step (a);
(b) judging whether each module meets the natural cooling closing condition, if not, executing the step (c), if so, further judging whether the running state values of all the modules are larger than 1, and if not, executing the step (c); if yes, closing the natural cooling operation of the modules meeting the conditions in sequence according to the address sequence, and then returning to the step (a);
(c) judging whether the closing condition of the compressor is met, if not, executing the step (d), if so, further judging whether the running state value of each module is an odd number, and if not, executing the step (d); if so,thenSequentially closing the compressors of the corresponding modules according to the address sequence, further judging whether the water temperature loading condition is met, if so, sequentially starting the natural cooling operation of the modules according to the module address sequence, and then returning to the step (a); if not, returning to the step (a);
(d) detecting whether a compressor starting condition is met, if not, executing the step (e), if so, further judging whether a water temperature loading condition is met and the running state values of all modules are more than or equal to 2, if so, sequentially starting the compressors meeting the condition modules according to the module address sequence, and then returning to the step (a); if not, executing the step (e);
(e) judging whether a module pair with one module being 0 and the other module being 3 exists in the running state values of all the modules, if so, switching the running state of the module with the running state value of 0 into the running state with the running state value of 2 according to the module address sequence, and then returning to the step (a); if not, executing the step (f);
(f) judging whether the total number of the modules with the running state value of 3 is more than or equal to the total number of the modules with the running state values of 0 and 1, if so, sequentially switching the modules with the running state value of 3 into the modules with the running state value of 2 to run according to the module address sequence, and then returning to the step (a); if not, directly returning to the step (a).
5. The control method according to claim 4, wherein the switching of the state is performed by switching only one module at a time, with a switching interval of time T2.
6. The control method according to claim 1, wherein the condition under which natural cooling is turned on is: the difference delta T between the inlet water temperature Tin and the environment temperature Tenv is larger than a set value Tzs; the natural cooling shut-off conditions are: the difference delta T between the inlet water temperature Tin and the ambient temperature Tenv is less than or equal to the set value Tzs-T.
7. The control method as set forth in claim 1, wherein the compressor off condition is:
the difference delta T between the inlet water temperature Tin and the environment temperature Tenv is less than or equal to a set limit temperature difference Tjx; the compressor starting conditions are as follows: the difference delta T between the inlet water temperature Tin and the ambient temperature Tenv is larger than the set limit temperature difference Tjx + T.
8. The control method as set forth in claim 1, wherein the water temperature loading condition is:
the outlet water temperature Tout is more than or equal to the sum of the water outlet target temperature Tog and the water temperature control precision dT; the water temperature unloading conditions are: the outlet water temperature Tout is smaller than the difference between the outlet water target temperature Tog and the water temperature control accuracy dT.
9. A storage medium containing computer-executable instructions for performing the method of controlling a multi-module air conditioning system of any one of claims 1-8 when executed by a computer processor.
10. A multi-module air conditioning system, characterized in that it employs the control method of any one of claims 1 to 8.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7430118B1 (en) * | 2007-06-04 | 2008-09-30 | Yahoo! Inc. | Cold row encapsulation for server farm cooling system |
| CN102080861A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团江苏有限公司 | Regulation method of working condition of air conditioner and integral air conditioner |
| CN106051969A (en) * | 2016-05-23 | 2016-10-26 | 合肥工业大学 | Control method of combined type air-conditioning system with natural cooling function |
| CN112178872A (en) * | 2020-09-18 | 2021-01-05 | 珠海格力电器股份有限公司 | Water chilling unit control method and device and water chilling unit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7430118B1 (en) * | 2007-06-04 | 2008-09-30 | Yahoo! Inc. | Cold row encapsulation for server farm cooling system |
| CN102080861A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团江苏有限公司 | Regulation method of working condition of air conditioner and integral air conditioner |
| CN106051969A (en) * | 2016-05-23 | 2016-10-26 | 合肥工业大学 | Control method of combined type air-conditioning system with natural cooling function |
| CN112178872A (en) * | 2020-09-18 | 2021-01-05 | 珠海格力电器股份有限公司 | Water chilling unit control method and device and water chilling unit |
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