CN113324318B - Control method of air-cooled modular unit - Google Patents
Control method of air-cooled modular unit Download PDFInfo
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- CN113324318B CN113324318B CN202010130038.6A CN202010130038A CN113324318B CN 113324318 B CN113324318 B CN 113324318B CN 202010130038 A CN202010130038 A CN 202010130038A CN 113324318 B CN113324318 B CN 113324318B
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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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- 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
- F24F2140/50—Load
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- 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
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Abstract
The invention relates to a control method of an air cooling module unit, the air cooling module unit comprises a plurality of parallel module units and can be connected to a plurality of tail ends, the control method comprises the following steps: inputting the designed outlet water temperature To, the target outlet water temperature Tset, the designed environment temperature Te, the total number N of the module machines and the total number M of the tail ends of the air-cooled module machine set; measuring the real-time ambient temperature Te 'and determining the real-time number of starts M' of the terminal; calculating a real-time capacity attenuation coefficient L of the air-cooled module unit based on the designed outlet water temperature To, the target outlet water temperature Tset, the designed environment temperature Te and the real-time environment temperature Te'; calculating the real-time load F of the air cooling module unit based on the real-time capacity attenuation coefficient L, the total number M of the tail ends and the real-time opening number M'; calculating the starting number N' of the module machines based on the real-time load F and the total number N of the module machines; and starting the module machine based on the calculated starting number N' so as to ensure that stable water outlet temperature is provided and the energy efficiency of the unit is improved.
Description
Technical Field
The invention relates to a control method of a central air-conditioning system, in particular to a control method of an air-cooling module unit.
Background
The air-cooled modular unit is generally a central air-conditioning equipment which is based on a modular technology, uses air as a cold (heat) medium and serves as a cold (heat) source. The air cooling module unit can be divided into a single refrigeration type and a heat pump type air cooling module unit. Both single-cooling and heat-pump air-cooling modular units are usually composed of a plurality of air-cooling modular units (hereinafter "modular units") connected in parallel and can be connected to a plurality of air-conditioning or user terminals (hereinafter "terminals") in order to be able to fulfill large-area cooling and/or heating needs. Each modular machine contains an independent refrigeration system, i.e., has a compressor, a condenser, an evaporator, and an expansion device. Therefore, the normal operation of other refrigeration circuits cannot be influenced when any refrigeration circuit is abnormal, and the relatively stable working performance of the unit is ensured.
In the prior art, the start and stop of the air cooling modular unit with a plurality of interconnected modular machines are controlled according to the outlet water temperature, and the change of load is not effectively considered. When the load of the air-cooled module unit is small, the fluctuation of the outlet water temperature is large. Therefore, the air-cooled modular unit is controlled only according to the outlet water temperature, not only can the unit be started and stopped frequently, but also the unit energy efficiency is reduced, and the reliability of the compressor can be influenced by the frequent start and stop of the unit.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the technical problems of large fluctuation of outlet water temperature and low energy efficiency when the load of an air-cooled modular unit is small, the present invention provides a control method for an air-cooled modular unit, wherein the air-cooled modular unit comprises a plurality of parallel modular units and can be connected to a plurality of terminals, and the control method comprises:
inputting a designed outlet water temperature To, a target outlet water temperature Tset, a designed environment temperature Te, the total number N of the module machines and the total number M of the tail ends of the air-cooled module machine set;
measuring the real-time environment temperature Te 'of the air-cooled modular unit and determining the real-time opening quantity M' of the tail end;
calculating a real-time capacity attenuation coefficient L of the air cooling module unit based on the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te and the real-time environment temperature Te';
calculating the real-time load F of the air cooling module unit based on the real-time capacity attenuation coefficient L, the total number M of the tail ends and the real-time opening number M';
calculating the starting number N' of the module machines based on the real-time load F and the total number N of the module machines; and is
Starting the module machine based on the calculated opening number N'.
In a preferred embodiment of the control method for the air-cooled modular unit, the step of starting the modular unit based on the calculated number of starts N' further includes the steps of:
comparing the calculated opening number N' with the total number N of the module machines;
when the calculated opening number N 'is smaller than the total number N of the module machines, starting the module machines one by one according to the calculated opening number N'; and
and when the calculated starting number N' is greater than or equal to the total number N of the module machines, starting all the module machines one by one.
In a preferred technical solution of the control method of the air-cooled modular unit, after the modular units are started one by one according to the calculated opening number N', the control method further includes:
judging the operation time T of the air-cooled modular unit Operation of Whether the first predetermined time period Tp1 is exceeded;
if the running time T is Operation of the device Without exceeding the first predetermined time period Tp1, the modular machine continues to run with the calculated number N' of openings; and
if the running time T is Operation of the device And recalculating the real-time capacity attenuation coefficient L 'and the real-time load F' if the first predetermined time period Tp1 is exceeded, and determining the variation n of the number of on-state of the modular machine based on the recalculated real-time capacity attenuation coefficient L 'and the real-time load F', wherein when-1<n<1, the number of started modular machines is kept unchanged; when n is more than or equal to 1, starting the n module machines in the standby state one by one; and are combinedAnd when n is less than or equal to-1, closing the n running module machines one by one.
In a preferable technical solution of the control method of the air-cooled modular unit, the control method further includes:
when the running time T of the air-cooled modular unit Operation of the device When a second preset time period Tp2 is reached, judging whether the real-time outlet water temperature of the air cooling module unit reaches the target outlet water temperature Tset, wherein the second preset time period Tp2 is longer than the first preset time period Tp1;
if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, closing the air cooling module unit; and is provided with
And if the real-time outlet water temperature of the air cooling module unit does not reach the target outlet water temperature Tset, returning to the step of recalculating the real-time capacity attenuation coefficient L 'and the real-time load R'.
In the preferable technical scheme of the control method of the air-cooled modular unit, after all the modular units are started one by one, the running time T of the air-cooled modular unit is determined Operation of When a second preset time period Tp2 is reached, judging whether the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset or not;
if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, closing the air cooling module unit;
if the real-time outlet water temperature of the air-cooled module unit does not reach the target outlet water temperature Tset, recalculating the real-time capacity attenuation coefficient L 'and the real-time load R', and determining the variable quantity N of the opening number of the module unit based on the recalculated real-time capacity attenuation coefficient L 'and the real-time load R', wherein-N < N <1; and is provided with
When the absolute value of the variable n is less than 1, all the module machines continue to keep the opening state; and when-N is less than N and less than or equal to-1, closing the N module machines in the running state one by one.
The control method of the air-cooled modular unitIn the preferred technical scheme of the method, after all the modular machines are continuously kept in the opening state or n modular machines in the running state are closed one by one, the running time T of the air cooling modular unit is determined Operation of the device And when the target water outlet temperature Tset reaches a second preset time period Tp2, re-entering the step of judging whether the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset.
In an optimal technical scheme of the control method of the air cooling module unit, the real-time capacity attenuation coefficient L of the air cooling module unit is calculated based on the following formula:
L＝{[A*(Tset/To)] 2 +[B*(Te’/Te)] 2 } 1/2 (formula 1)
Wherein A and B are constants.
In a preferred technical solution of the control method for the air-cooled modular unit, the real-time load F is calculated based on the following formula:
f = L × M'/M, (formula 2).
In a preferred technical solution of the control method of the air-cooled modular unit, the number N' of the modules that are turned on is calculated based on the following formula:
n' = F × N, (formula 3)
Wherein, N' takes the integral bit value of F N +1.
In a preferred embodiment of the control method for the air-cooled modular unit, the variation n is calculated based on the following formula:
n = F '× N-N' (formula 4).
The technical scheme includes that in order To avoid the technical problems of large fluctuation of the outlet water temperature of the air cooling module unit and low energy efficiency, the control method collects the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te, the total number of the module units N and the total number of the tail ends M of the air cooling module unit and measures the real-time environment temperature Te' so as To calculate the real-time capacity attenuation coefficient L of the air cooling module unit based on the parameters; calculating the real-time load F of the air cooling module unit based on the total number M of the tail ends, the real-time opening number M' of the tail ends and the real-time capacity attenuation coefficient L; calculating the number N' of the module machines needing to be started based on the real-time load F and the total number of the module machines; and starting the module machine based on the calculated number N'. The number of the modules of the air cooling module unit is controlled to start and stop by judging the change of the tail end load, namely when the environment temperature is high or the load of the unit is low, only part of the modules are started to maintain stable water outlet temperature, so that the technical problems that the water outlet temperature of the air cooling module unit is greatly fluctuated and the energy efficiency of the unit is reduced can be solved, and the unit can be prevented from being started and stopped frequently.
Preferably, during the operation of the air-cooling module unit, the opening number of the module units is adjusted in real time by recalculating the real-time capacity attenuation coefficient L 'and the real-time load F' of the air-cooling module unit according to the change of the environmental temperature and/or the load, so as to ensure the stability of the outlet water temperature.
Preferably, formula 1' l = { [ a (Tset/To)] 2 +[B*(Te’/Te)] 2 } 1/2 The real-time capacity attenuation coefficient of the air-cooled modular unit is determined according to the capacity attenuation coefficient curve. Therefore, the start and stop of the air cooling module unit can be controlled more accurately based on the real-time capacity attenuation coefficient.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is an example of a system of an air-cooled modular unit to which the control method of the air-cooled modular unit of the present invention is applicable;
FIG. 2 is a flow chart of a control method of the air cooling module set of the present invention;
fig. 3 is a flowchart of an embodiment of a control method of an air cooling module unit according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
In order to solve the technical problems of large water temperature fluctuation and insufficient energy efficiency of the conventional air-cooled modular unit, the invention provides a control method of the air-cooled modular unit, wherein the air-cooled modular unit comprises a plurality of modular units which are connected in parallel and can be connected to a plurality of tail ends, and the control method comprises the following steps:
inputting the designed outlet water temperature To, the target outlet water temperature Tset, the designed environment temperature Te, the total number N of the module machines and the total number M of the tail ends of the air-cooled module machine set;
measuring the real-time environment temperature Te 'of the air cooling module unit and determining the real-time opening quantity M' of the tail end;
calculating a real-time capacity attenuation coefficient L of the air cooling module unit based on the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te and the real-time environment temperature Te';
calculating the real-time load F of the air cooling module unit based on the real-time capacity attenuation coefficient L, the total number M of the tail ends and the real-time opening number M';
calculating the starting number N' of the module machines based on the real-time load F and the total number N of the module machines; and is
Starting the module machine based on the calculated starting number N'.
The design water temperature To and the design environment temperature Te refer To parameters on which the air-cooled modular unit is designed and selected. The target outlet water temperature Tset refers to a unit target outlet water temperature selected by a user based on a specific operation condition when the air-cooled module unit operates.
Fig. 1 is an example of a system of an air-cooled modular unit to which the control method of the air-cooled modular unit of the present invention is applicable. As shown in fig. 1, the air-cooled modular unit has a plurality of N air-cooled modular units 11 connected in parallel to each other and fluidly connected to a plurality of M terminals 12 through pipes. Each module 11 has an independent heat pump refrigeration system. These modular machines 11 are capable of providing cold and/or hot water to some or all of the terminals 12 as needed to meet the cooling and heating load demands of the user. The control method of the air cooling module unit can be applied to the air cooling module unit so as to control the starting and stopping number of the module machines 11 of the air cooling module unit by judging the load change of the tail end 12 according to the change of the environment and/or the load, thereby ensuring the stable water outlet temperature, avoiding the frequent starting and stopping of the unit and further improving the energy efficiency ratio of the unit.
Fig. 2 is a flow chart of the control method of the air cooling module unit of the invention. The control method of the air cooling module unit comprises the steps of S1, S2, S3, S4, S5 and S6. In step S1, the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te, the total number N of the module units, and the total number M of the terminals of the air-cooled module unit are input. In step S2, the real-time ambient temperature Te 'of the air-cooled modular unit is measured, and the real-time number of terminals turned on M' is determined. In step S3, a real-time capacity attenuation coefficient L of the air-cooled modular unit is calculated based on the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te, and the real-time environment temperature Te'. In one or more embodiments, the real-time capability attenuation factor L is calculated using equation 1, namely:
L＝{[A*(Tset/To)] 2 +[B*(Te’/Te)] 2 } 1/2 ，
wherein, A and B are constants related to the air-cooled modular unit and can be determined according to experiments respectively. In step S4, the real-time load F of the air-cooled modular unit is calculated based on the real-time capacity attenuation coefficient L, the total number M of the terminals, and the real-time opening number M'. In one or more embodiments, the real-time load of the air-cooled modular unit F = L × M'/M (equation 2). In step S5, the on-number N' of the module machines is calculated based on the real-time load F and the total number N of the module machines. In one or more embodiments, N '= F × N (formula 3), where N' takes the integer bit value of F × N +1. In step S6, the module machine is started based on the calculated number of on-times N'. Unless explicitly stated to the contrary, these steps are not limited in the order of execution, e.g., steps S1 and S2 may be executed concurrently.
Fig. 3 is a flowchart of an embodiment of a control method of an air cooling module set according to the present invention. As shown in fig. 3, in one or more embodiments, the method for controlling an air-cooled module set of the present invention includes steps S1-S5, so as to obtain a real-time capacity attenuation coefficient L, a real-time load L, and a number N' of modules that need to be turned on of the air-cooled module set by using equations 1, 2, and 3, respectively.
In one or more embodiments, after calculating the number of module machines N' that need to be turned on in step S5, control may proceed to step S7. As shown in fig. 3, in step S7, the calculated number of on-state N' is compared with the total number of module machines N. When the calculated number of starts N 'is smaller than the total number N of the module machines, the control method proceeds to step S8, i.e., the module machines are started one by one according to the calculated number of starts N'. When the calculated number N' of on-times is equal to or greater than N, the control method proceeds to step S15 to start all the N modular machines one by one. There is a time interval between the module machines being started one by one, for example every 3 minutes (other suitable time intervals may be selected as required) to reduce the circuit load at start-up.
After the N' module machines of step S8 are started, the control method proceeds to step S9 to determine the unit operation time T Operation of Whether the first time interval Tp1 is exceeded. In one or more embodiments, first time interval Tp1= N'. Sup.3 +10 in minutes, where "3" is the start-up interval time of the modular machine 3 minutes. In other embodiments, the start-up time interval may be longer or shorter than 3 minutes.
If the running time T is Operation of If the first predetermined time period Tp1 is not exceeded, the control method returns to step S8 to start the N' module machines one by one or to keep running after start-up. If the running time T is Operation of Beyond the first predetermined time period Tp1, the control method then proceeds to step S10, where the real-time capacity attenuation factor L ' and the real-time load F ' are recalculated based on the measured real-time ambient temperature Te '. In one or more embodiments, the calculation formulas used are formula 1 and formula 2, respectively. Then, the control method proceeds to step S11, where the variation n of the turn-on number of the module machine is determined based on the recalculated real-time capacity attenuation coefficient L 'and the real-time load F' in step S11. The control method then proceeds to step S12 to determine whether the variation n is-1<n<1. If so, it means that the number of started modular machines does not need to be changed, e.g. continued with the calculated numberThe opening number N' is run until the air-cooled modular unit running time reaches a second predetermined time period Tp2, for example, 30 minutes (step S16). The second predetermined time period Tp2 should be longer than the first predetermined time period Tp2. Then, the control method proceeds to step S17, and determines whether the real-time outlet water temperature of the air-cooling module unit reaches the target outlet water temperature Tset. And if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, stopping the operation of the air cooling module unit (step S18), and ending the control process. If the real-time outlet water temperature of the air cooling module unit does not reach the target outlet water temperature Tset, the control method returns to the step S10, and the real-time capacity attenuation coefficient L 'and the real-time load F' are recalculated.
As shown in FIG. 3, when n ≧ 1, which indicates that the total capacity of the started modular machines is insufficient to meet the actual load demand, more modular machines need to be started, so the control method proceeds to step S13 to start the n modular machines in standby state one by one. Conversely, when n ≦ 1, indicating that the total capacity of the operating modular machines exceeds the actual load demand, control proceeds to step S14 to shut down the n modular machines in operation, one by one. There may also be a time interval between the machine modules being shut down, for example, one machine module being shut down every 3 minutes (other suitable time intervals may be selected as desired). Then, the air-cooled modular unit starts to time until the running time T of the air-cooled modular unit Operation of A second predetermined time period Tp2, for example 30 minutes, is reached (step S16). When the running time T of the air-cooled modular unit Operation of When the second preset time period Tp2 is reached, the control method also proceeds to step S17, and it is determined whether the real-time outlet water temperature of the air-cooling module unit reaches the target outlet water temperature Tset. And if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, stopping the operation of the air cooling module unit (step S18), and ending the control process. If the real-time outlet water temperature of the air cooling module unit does not reach the target outlet water temperature Tset, the control method returns to the step S10, and the real-time capacity attenuation coefficient L 'and the real-time load F' are recalculated.
With continued reference to FIG. 3, in one or more embodiments, after all N modular machines are activated one by one in step S15, the air-cooled modular units are also turned onStarting to time until its running time T Operation of A second predetermined time period Tp2, for example 30 minutes, is reached (step S16). When the running time T of the air-cooled modular unit Operation of When the second preset time period Tp2 is reached, the control method proceeds to step S17, and then determines whether the outlet water temperature of the air-cooling module unit reaches the target outlet water temperature Tset. And if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, stopping the operation of the air cooling module unit (step S18), and ending the control process. If the real-time outlet water temperature of the air cooling module unit does not reach the target outlet water temperature Tset, the control method returns to the step S10, and the real-time capacity attenuation coefficient L ' and the real-time load F ' are recalculated by using the measured real-time environment temperature Te '. Then, the control method proceeds to step S11, and determines the variation n of the turn-on number of the module machine based on the recalculated real-time capacity attenuation coefficient L 'and the real-time load F'. In the case where all modular machines have been fully activated, the actual range of values for N should be-N<n<1, there is no situation that a new modular machine needs to be started. Therefore, if-1<n<1, the control method proceeds to step S16, i.e. the air-cooled modular unit starts to time until its running time T Operation of the device A second predetermined time period Tp2, for example 30 minutes, is reached. if-N<n is less than or equal to-1, which indicates that the total capacity of the operated modular machines exceeds the actual load demand, and therefore n operated modular machines need to be shut down, and correspondingly, the control method proceeds to step S14. The control method then proceeds to step S16, in which the air-cooled modular unit is started to time up to its operating time T Operation of the device A second predetermined time period Tp2 is reached, for example 30 minutes or other longer or shorter time period that can suffice. When the running time T of the air-cooled modular unit Operation of the device When the second preset time period Tp2 is reached, the control method proceeds to step S17, and then determines whether the real-time outlet water temperature of the air cooling module unit reaches the target outlet water temperature Tset. And if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, stopping the operation of the air cooling module unit (step S18), and ending the control process. If the real-time outlet water temperature of the air cooling module unit does not reach the target outlet water temperature Tset, the control method also returns to the step S10, and the real-time outlet water temperature is recalculatedA capacity attenuation factor L 'and a real-time load F'.
According to the control method of the air cooling module unit, the load change under different working conditions can be measured according to the performance attenuation change curve of the unit during the operation of the air cooling module unit, and the operation number of the module units can be adjusted in real time according to the real-time change of the environment temperature and/or the load, so that the stable supply of the outlet water temperature of the air cooling module unit is ensured, the frequent start and stop of a compressor are avoided, and the energy efficiency ratio of the air cooling module unit is improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. A control method of an air-cooled modular unit, wherein the air-cooled modular unit comprises a plurality of modular units connected in parallel and can be connected to a plurality of tail ends, the control method comprises the following steps:
inputting the designed outlet water temperature To, the target outlet water temperature Tset, the designed environment temperature Te, the total number N of the module machines and the total number M of the tail ends of the air-cooled module machine set;
measuring the real-time environment temperature Te 'of the air cooling module unit and determining the real-time opening number M' of the tail end;
calculating a real-time capacity attenuation coefficient L of the air cooling module unit based on the design outlet water temperature To, the target outlet water temperature Tset, the design environment temperature Te and the real-time environment temperature Te';
calculating the real-time load F of the air cooling module unit based on the real-time capacity attenuation coefficient L, the total number M of the tail ends and the real-time opening number M';
calculating the starting number N' of the module machines based on the real-time load F and the total number N of the module machines; and is
Starting the module machine based on the calculated number of starts N',
the real-time capacity attenuation coefficient L of the air cooling module unit is calculated based on the following formula:
L＝{[A*(Tset/To)] 2 +[B*(Te’/Te)] 2 } 1/2 wherein A and B are constants;
wherein the real-time load F is calculated based on the following formula:
f = L M'/M; and
wherein the starting number N' of the modular machines is calculated based on the following formula:
n '= F × N, where N' takes the integer bit value of F × N +1.
2. The control method of the air-cooled modular unit according to claim 1, characterized in that, in the step of starting the modular unit based on the calculated number of on-times N', it comprises the further steps of:
comparing the calculated number of on-times N' with the total number of the module machines N,
when the calculated opening number N 'is smaller than the total number N of the module machines, starting the module machines one by one according to the calculated opening number N'; and
and when the calculated opening number N' is greater than or equal to the total number N of the module machines, starting all the module machines one by one.
3. The control method of the air-cooling module unit as set forth in claim 2, wherein after starting the module units one by one according to the calculated opening number N', the control method further comprises:
judging the operation time T of the air-cooled module unit Operation of Whether the first predetermined time period Tp1 is exceeded;
if the running time T is Operation of The first predetermined time period Tp1 is not exceeded, the modular machine continues to run with the calculated number of openings N'; and
if the running time T is Operation of If the first predetermined time period Tp1 is exceeded, recalculating the real-time capacity attenuation factor L 'and the real-time load F', and determining the variation n of the number of switching-on of the modular machine based on the recalculated real-time capacity attenuation factor L 'and the real-time load F', wherein when-1<n<1, the number of started modular machines is kept unchanged; when n is more than or equal to 1, starting the n module machines in a standby state one by one; and when n is less than or equal to-1, closing the n running module machines one by one.
4. The control method of the air-cooled modular unit according to claim 3, further comprising:
when the running time T of the air-cooled modular unit Operation of When a second preset time period Tp2 is reached, judging whether the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, wherein the second preset time period Tp2 is longer than the first preset time period Tp1;
if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, closing the air cooling module unit; and is
And if the real-time water outlet temperature of the air cooling module unit does not reach the target water outlet temperature Tset, returning to the step of recalculating the real-time capacity attenuation coefficient L 'and the real-time load F'.
5. The control method of the air-cooled modular unit as claimed in claim 2, wherein the air-cooled modular unit is operated for a running time T after all the modular units are started up one by one Operation of the device When a second preset time period Tp2 is reached, judging whether the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset or not;
if the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset, closing the air cooling module unit;
if the real-time outlet water temperature of the air-cooled module unit does not reach the target outlet water temperature Tset, recalculating the real-time capacity attenuation coefficient L 'and the real-time load F', and determining the variable quantity N of the opening number of the module unit based on the recalculated real-time capacity attenuation coefficient L 'and the real-time load F', wherein-N < N <1; and is
When the absolute value of the variable n is less than 1, all the module machines continue to keep the opening state; and when-N is less than N and less than or equal to-1, closing the N running module machines one by one.
6. The control method of the air-cooled modular unit as claimed in claim 5, wherein the air-cooled modular unit is operated for a time T after all the modular units are continuously turned on or n of the modular units are turned off one by one Operation of And when a second preset time period Tp2 is reached, the step of judging whether the real-time water outlet temperature of the air cooling module unit reaches the target water outlet temperature Tset or not is carried out again.
7. The control method of the air cooling module set according to claim 3 or 5, wherein the variation n is calculated based on the following formula:
n＝F’*N-N’。
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| CN202010130038.6A CN113324318B (en) | 2020-02-28 | 2020-02-28 | Control method of air-cooled modular unit |
| PCT/CN2020/091308 WO2021169060A1 (en) | 2020-02-28 | 2020-05-20 | Method for controlling air-cooling module unit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003294290A (en) * | 2002-04-02 | 2003-10-15 | Yamatake Corp | Unit number control device of heat source and unit number control method |
| CN101986050A (en) * | 2010-09-09 | 2011-03-16 | 宁波奥克斯电气有限公司 | Method for controlling air-conditioner in variable volume modular unit |
| CN103375878A (en) * | 2012-04-26 | 2013-10-30 | 上海宝信软件股份有限公司 | Group control method for central air conditioning refrigerating unit |
| CN105546757A (en) * | 2016-01-05 | 2016-05-04 | 珠海格力电器股份有限公司 | Group control method and system for water chilling unit |
| JP2018017446A (en) * | 2016-07-27 | 2018-02-01 | 三菱電機ビルテクノサービス株式会社 | Air conditioning system and operation control method |
| CN108626923A (en) * | 2017-03-15 | 2018-10-09 | 约克广州空调冷冻设备有限公司 | A kind of control structure and control method of air-conditioning system |
| CN109812949A (en) * | 2019-02-22 | 2019-05-28 | 广东欧科空调制冷有限公司 | A kind of load control method, device and the air-conditioning of multi-compressor unit |
| CN209689093U (en) * | 2019-02-10 | 2019-11-26 | 大连鸿成机电设备有限公司 | A kind of public station system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3707185A (en) * | 1971-03-25 | 1972-12-26 | Modine Mfg Co | Modular air cooled condenser |
| 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 |
| CN110793161B (en) * | 2019-11-01 | 2021-06-08 | 青岛海信日立空调系统有限公司 | Air-cooled module unit |
-
2020
- 2020-02-28 CN CN202010130038.6A patent/CN113324318B/en active Active
- 2020-05-20 WO PCT/CN2020/091308 patent/WO2021169060A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003294290A (en) * | 2002-04-02 | 2003-10-15 | Yamatake Corp | Unit number control device of heat source and unit number control method |
| CN101986050A (en) * | 2010-09-09 | 2011-03-16 | 宁波奥克斯电气有限公司 | Method for controlling air-conditioner in variable volume modular unit |
| CN103375878A (en) * | 2012-04-26 | 2013-10-30 | 上海宝信软件股份有限公司 | Group control method for central air conditioning refrigerating unit |
| CN105546757A (en) * | 2016-01-05 | 2016-05-04 | 珠海格力电器股份有限公司 | Group control method and system for water chilling unit |
| JP2018017446A (en) * | 2016-07-27 | 2018-02-01 | 三菱電機ビルテクノサービス株式会社 | Air conditioning system and operation control method |
| CN108626923A (en) * | 2017-03-15 | 2018-10-09 | 约克广州空调冷冻设备有限公司 | A kind of control structure and control method of air-conditioning system |
| CN209689093U (en) * | 2019-02-10 | 2019-11-26 | 大连鸿成机电设备有限公司 | A kind of public station system |
| CN109812949A (en) * | 2019-02-22 | 2019-05-28 | 广东欧科空调制冷有限公司 | A kind of load control method, device and the air-conditioning of multi-compressor unit |
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