CN117177546A - Intelligent control system of cooling fan - Google Patents
Intelligent control system of cooling fan Download PDFInfo
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- CN117177546A CN117177546A CN202311445257.3A CN202311445257A CN117177546A CN 117177546 A CN117177546 A CN 117177546A CN 202311445257 A CN202311445257 A CN 202311445257A CN 117177546 A CN117177546 A CN 117177546A
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- 238000001816 cooling Methods 0.000 title claims abstract description 162
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 238000005057 refrigeration Methods 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 2
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The application belongs to the technical field of reactive power compensation of power systems, and particularly relates to an intelligent control system of a cooling fan. The intelligent control system of the cooling fan is applied to an SVG system and mainly comprises a current detection module, a temperature detection module, a refrigerating unit and a control unit, wherein the refrigerating unit comprises the cooling fan, the control unit receives detection signals fed back by the current detection module and the temperature detection module in real time, and the starting and the rotating speed adjustment of the cooling fan are controlled by judging the corresponding relation between the temperature of an IGBT (insulated gate bipolar transistor) inner core in each chain link unit and the current of a converter chain. According to the intelligent control system of the cooling fan, the rotating speed of the cooling fan is correspondingly adjusted according to the feedback signal of the detection module, the adjustment control precision is high, frequent start and stop of the cooling fan can be effectively avoided, the energy consumption of the system is reduced, the running stability of the system is improved, and the working noise is reduced.
Description
Technical Field
The application belongs to the technical field of reactive power compensation of power systems, and particularly relates to an intelligent control system of a cooling fan.
Background
At present, an air cooling circulation system in an SVG system (Static Var Generator ) generally adopts an automatic control mode, and the start and stop of a cooling fan are controlled according to temperature numerical feedback of a chain unit so as to ventilate and dissipate heat of the chain unit. For example, the method for controlling the start and stop of the SVG cooling fans is disclosed in Chinese patent publication No. CN106438427B, wherein the cooling fans are divided into a plurality of groups, direct corresponding relation between IGBT temperature and current of a converter chain is established for each group of cooling fans, the start and stop of each group of cooling fans are independently controlled according to the IGBT temperature and the corresponding relation of each group of fans, intermittent ventilation and heat dissipation are carried out according to actual heat dissipation requirements, unnecessary operation of the cooling fans is reduced, and energy consumption is reduced.
However, the control method is easy to cause frequent switching of the cooling fan between the starting state and the stopping state, and the frequent starting and stopping can cause larger damage to the cooling fan, so that the service life of the fan is influenced, and the cooling fan can generate larger vibration and noise in the initial starting process, so that the overall stability of equipment is influenced.
Disclosure of Invention
Based on this, it is necessary to provide an intelligent control system of a cooling fan to solve the problems of high energy consumption and high working noise of the cooling system in the prior art.
The above purpose is achieved by the following technical scheme: an intelligent control system of a cooling fan is applied to an SVG system, the number of chain link units in the SVG system is i, i is more than or equal to 2 and is an integer, and the intelligent control system comprises: the current detection module is used for detecting the current of the current conversion chain of each chain link unit; the temperature detection module is used for detecting the temperature of the IGBT inner cores in the chain link units; the refrigerating unit comprises i groups of cooling fans, and each group of cooling fans is arranged in one-to-one correspondence with the chain link units and is used for cooling the chain link units; the control unit can receive the current value signal fed back by the current detection module and the temperature value signal detected by the temperature detection module, and correspondingly control the start and stop of the cooling fan and the change of the rotating speed; the current detection module detects the current of the current converting chain of each chain link unit in real time and feeds back a detected current value signal Ik to the control unit, the temperature detection module detects the temperature of the IGBT inner core of each chain link unit in real time and feeds back a detected temperature value signal Tk to the control unit, wherein k is more than 0 and less than i, and the control unit executes the following judging steps according to the received real-time feedback signals Ik and Tk:
step S01: before the cooling fan corresponding to the kth chain link unit is started, if M1-K1 is equal to or less than Ik, the control unit controls the cooling fan corresponding to the kth chain link unit to be started, wherein M1 and K1 are set constants;
step S02: after the cooling fan corresponding to the kth chain link unit is started, the initial rotating speed of the cooling fan corresponding to the kth chain link unit is nk, and if M2-K2 is Tk < Ik, the control unit controls the rotating speed of the cooling fan corresponding to the kth chain link unit to increase; if M2-k2×tk=ik, the control unit controls the rotation speed of the cooling fan corresponding to the kth link unit to be kept unchanged; if M2-K2×tk > Ik, the control unit controls the rotation speed of the cooling fan corresponding to the kth link unit to decrease, wherein M2 and K2 are set constants, and M1-K1×tk is less than M2-K2×tk.
The application has the beneficial effects that: each chain link unit corresponding to the SVG system is provided with a temperature detection module, a current detection module and a cooling fan, the current of a converter chain of each chain link unit and the temperature of an IGBT inner core are detected in real time, and a control unit carries out operation judgment according to a feedback numerical value signal, so that the running state of the cooling fan is accurately regulated according to the running condition of each chain link unit of the SVG system, the pertinence is strong, the control is accurate, and the energy consumption required by cooling is effectively reduced. In addition, the rotating speed of the cooling fan is controlled to be correspondingly adjusted according to the feedback signal, so that frequent start and stop of the cooling fan can be effectively avoided, the running stability of the cooling fan is ensured, and the service life of the cooling fan is prolonged; meanwhile, the cooling fan maintains a certain rotating speed to run, can perform stable ventilation and cooling on the chain link units, reduces the fluctuation range of the temperature of the chain link units, reduces the numerical fluctuation of the current of the converter chain of the chain link units, and improves the running stability of the chain link units.
Further, the detection period of the current detection module is the same as the detection period of the temperature detection module.
The beneficial effects are that: the detection periods of the two detection modules are the same, so that more accurate detection data can be provided for the operation judgment of the control unit, and the accuracy of feedback control is improved.
Further, the intelligent cooling system further comprises a rotating speed detection module, wherein the rotating speed detection module can detect the rotating speed of each cooling fan in real time and feed back a rotating speed numerical signal obtained by detection to the control unit.
Further, the determining step performed by the control unit further includes:
and S03, when the rotating speed of the cooling fan corresponding to the kth chain link unit is reduced to nk, the control unit controls the cooling fan corresponding to the kth chain link unit to be closed.
Further, the refrigerating unit further comprises a refrigerating assembly, the refrigerating assembly can provide cool air for the cooling fan, and the cooling fan blows the cool air to the corresponding chain link unit to realize cooling.
The beneficial effects are that: the additional refrigeration subassembly that sets up provides air conditioning for cooling fan, can effectively improve cooling fan's cooling effect to reduce cooling fan's operation load, reduce cooling fan's energy consumption, and reduce operating noise.
Further, the determining step performed by the control unit further includes:
step S04: the control unit calculates the total heat generated by all the chain unit units in unit time, qheat=c×m (delta T1+ delta T2+ … + delta Ti), wherein delta T1, delta T2, … and delta Ti are temperature change values of all the chain unit units in unit time, and c and m are constants; the control unit is provided with a minimum heat threshold Qmin and a maximum heat threshold Qmax, qmin is smaller than Qmax, when the Q heat is larger than or equal to Qmax, the control unit controls the power of the refrigerating assembly to be increased, and when the Q heat is smaller than Qmin, the control unit controls the power of the refrigerating assembly to be reduced.
The beneficial effects are that: the total heat generated by all the chain link units in unit time is calculated, the overall heating condition of the chain link units can be intuitively fed back, the power change of the refrigerating assembly is controlled according to the heating condition, and the cooling assembly is matched with ventilation of the cooling fan, so that unnecessary energy consumption of the refrigerating assembly can be reduced while cooling the chain link units is effectively ensured, and the overall working noise of the system is reduced.
Further, the determining step performed by the control unit further includes: step S05: the control unit calculates the total air quantity G wind of all cooling fans in unit time, wherein G wind = f (n1+n2+ … +ni), f is an air quantity calculation coefficient, f is a constant, and n1, n2, … and ni are real-time rotating speeds of all the cooling fans; the control unit is provided with a maximum air volume threshold Gmax, and when G air is larger than or equal to Gmax, the control unit sends out a warning signal and controls the power of the refrigeration assembly to be increased.
The beneficial effects are that: the control unit calculates the total air quantity of the cooling fan, correspondingly adjusts the power of the refrigerating assembly, prevents the overall load of the cooling motor from being overlarge, and comprehensively judges the cooling and heat dissipation conditions according to the total air quantity so as to give a warning in time when the cooling fan or the chain link unit has abnormal conditions.
Further, the refrigerating assembly is arranged in the refrigerating space, the refrigerating assembly can cool the air in the refrigerating space, an air inlet is correspondingly formed in one side of each chain link unit in the refrigerating space, an air outlet is correspondingly formed in the other side of each chain link unit, the cooling fan is arranged at the air outlet, and the cooling fan can blow cool air in the refrigerating space out of the air outlet to cool the chain link units.
Further, the intelligent control system and the SVG system are arranged in a closed shell together.
The beneficial effects are that: through setting up air outlet and the air intake of intercommunication refrigeration space in chain link unit both sides, the ventilation effect of cooperation cooling blower has realized the inner loop of air current, reduces the heat exchange that air conditioning and external emergence, guarantees the cooling effect to the whole energy consumption of reduction system. In addition, the air flow is internally circulated, so that the whole system can be arranged in the closed shell and is not communicated with the outside, the whole system is effectively protected, and the influence of external interference such as oxidation, corrosion, dust and the like on the whole system is reduced.
Further, the detection period of the current detection module and the detection period of the temperature detection module are both microsecond.
Drawings
FIG. 1 is a schematic diagram of an intelligent control system of a cooling fan according to the present application;
wherein: 100. a closed housing; 200. a control unit; 300. a link unit; 400. a partition plate; 500. a cooling fan; 600. an air inlet; 700. an air outlet; 800. a refrigerating space; 900. a refrigeration assembly.
Detailed Description
The present application will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The intelligent control system of the cooling fan of the application is described in detail below with reference to the accompanying drawings and the detailed description.
An embodiment one of the intelligent control system of the cooling fan of the present application: referring to FIG. 1, the intelligent control system of the cooling fan of the present application is applied to an SVG system, and the SVG system is integrally provided in a hermetic shell 100 together with the SVG system, wherein the SVG system includes a plurality of link units 300, and the number of the link units 300 is defined as i (i is equal to or greater than 2 and is an integer).
The intelligent control system of the cooling fan mainly comprises a current detection module, a temperature detection module, a rotation speed detection module, a control unit 200 and a refrigerating unit, wherein the current detection module can detect the current of a converter chain of each chain link unit 300 in real time and feed back a detected current value signal Ik to the control unit 200, the temperature detection module can detect the temperature of an IGBT (insulated gate bipolar transistor) inner core of each chain link unit 300 in real time and feed back a detected temperature value signal Tk to the control unit 200, the rotation speed detection module can detect the rotation speed of each cooling fan 500 in real time and feed back a detected rotation speed value signal to the control unit 200, and after receiving the current value signal fed back by the current detection module, the temperature value signal detected by the temperature detection module and the rotation speed value signal fed back by the rotation speed detection module, the control unit 200 carries out operation processing on data and feeds back and adjusts the running state of the refrigerating unit according to a judging step.
The detection period of the current detection module, the detection period of the temperature detection module and the detection period of the rotation speed detection module are the same, and the detection periods are all 0.8 microsecond, so that the three can feed back data signals to the control unit 200 at the same time, more accurate operation data are provided for the control unit 200, the feedback adjustment precision of the control unit 200 is improved, the operation of the refrigeration unit is coordinated to the greatest extent, and the energy consumption of the system is reduced.
The refrigerating unit comprises cooling fans 500, a refrigerating space 800 and refrigerating components 900 arranged in the refrigerating space 800, the refrigerating components 900 can cool air in the refrigerating space 800, air inlets 600 are correspondingly formed in one sides of the chain link units 300 in the refrigerating space 800, air outlets 700 are correspondingly formed in the other sides of the chain link units 300, the cooling fans 500 are divided into i groups, the cooling fans 500 in each group are correspondingly arranged at the air outlets 700 one by one, and the cooling fans 500 blow out cool air in the refrigerating space 800 from the air outlets 700, so that the chain link units 300 are cooled. The control unit 200 can control the start and stop of the cooling fan 500 and can adjust the rotation speed of the cooling fan 500.
The refrigeration assembly 900 in the refrigeration unit cooperates with the cooling fan 500 to effectively enhance the cooling effect, so as to achieve the purpose of saving energy, specifically, the refrigeration assembly 900 refrigerates the gas in the refrigeration space 800, so that the cooling fan 500 can blow out low-temperature air flow, thereby accelerating the cooling of the chain link unit 300, and the cooling fan 500 drives the air flow to form the air flow internal circulation of 'the air outlet 700-the chain link unit 300-the air inlet 600-the refrigeration space 800-the refrigeration assembly 900-the air outlet 700' in the airtight housing 100, so that the intelligent control system and the SVG system of the cooling fan can be jointly arranged in the airtight housing 100 without introducing external air, the heat exchange between the low-temperature air flow blown out by the cooling fan 500 and the outside is reduced, the energy consumption of the refrigeration assembly 900 is reduced while the cooling effect of the chain link unit 300 is ensured, and the loss of output power is reduced, thereby reducing the overall energy consumption of the system.
And the whole system is arranged in the airtight shell 100, so that the influence of external interference such as oxidization, corrosion and dust on the whole system can be effectively reduced, and the stable operation of the whole system is ensured. The sealed shell 100 is further internally provided with a baffle 400, the baffle 400 separates each chain link unit 300, and simultaneously separates the cooling fan 500, the air inlet 600 and the air outlet 700 corresponding to different chain link units 300, so that the mutual influence among the chain link units 300 is avoided, the accuracy of feedback values is ensured, and the control precision of the intelligent control system is improved.
Further, taking the kth link unit 300 as an example, the control unit 200 performs the following determination steps:
step S01: before the cooling fan 500 corresponding to the kth chain unit 300 is started, if M1-K1 is equal to or less than Ik, the control unit 200 controls the cooling fan 500 corresponding to the kth chain unit 300 to start, where M1 and K1 are set constants;
step S02: after the cooling fan 500 corresponding to the kth link unit 300 is started, the initial rotation speed of the cooling fan 500 corresponding to the kth link unit 300 is nk, and if M2-K2×tk < Ik, the control unit 200 controls the rotation speed of the cooling fan 500 corresponding to the kth link unit 300 to increase; if M2-k2×tk=ik, the control unit 200 controls the rotation speed of the cooling fan 500 corresponding to the kth link unit 300 to remain unchanged; if M2-K2×tk > Ik, the control unit 200 controls the rotation speed of the cooling fan 500 corresponding to the kth link unit 300 to decrease, wherein M2 and K2 are set constants, and M1-K1×tk < M2-K2×tk.
That is, whether the control unit 200 controls the cooling fan 500 to start needs to be determined according to the relationship between the temperature of the IGBT core and the current of the converter chain, and after the cooling fan 500 is started, the control unit 200 also adjusts the rotation speed of the cooling fan 500 according to the real-time correspondence between the temperature of the IGBT core and the current of the converter chain, so that the control unit has a relatively strong pertinence and an accurate control relationship, and can avoid frequent start and stop of the cooling fan 500, prevent the frequent start and stop of the cooling fan 500 from causing the temperature of the link unit 300 to fluctuate greatly, and through the operation stability of the link unit 300, simultaneously prolong the service life of the cooling fan 500.
In step S03, when the rotation speed of the cooling fan 500 corresponding to the kth link unit 300 is reduced to nk, the control unit 200 controls the cooling fan 500 corresponding to the kth link unit 300 to be turned off.
Step S04: the control unit 200 calculates the total heat generated by all the unit cells 300 in a unit time, qheat=cχ m (Δt1+Δt2+ … +Δti), where Δt1, Δt2, …, Δti are the temperature change values of each unit cell 300 in a unit time, and c and m are constants; the control unit 200 has a minimum heat threshold Qmin and a maximum heat threshold Qmax, qmin < Qmax, and when qheat is greater than or equal to Qmax, the control unit 200 controls the power of the refrigeration assembly 900 to increase, and when qheat is less than Qmin, the control unit 200 controls the power of the refrigeration assembly 900 to decrease.
The control unit 200 calculates the total heat generated by all the link units 300 in unit time, can intuitively feed back the overall heating condition of the link units 300 through the total heat value, and adjusts the power of the refrigerating assembly 900 on the whole according to the heating condition, so that the power changes according to the heat dissipation requirement of the link units 300, the accuracy of feedback adjustment of the system is further improved, the rotating speed adjustment of the cooling fan 500 is matched, the unnecessary energy consumption of the refrigerating assembly 900 is reduced while the cooling of the link units 300 is effectively ensured, and the overall working noise of the system is reduced.
Step S05: the control unit 200 calculates the total air volume gwind of all cooling fans 500 in a unit time, wherein gwind=f (n1+n2+ … +ni), f is an air volume calculation coefficient, f is a constant, and n1, n2, … and ni are real-time rotational speeds of the cooling fans 500; the control unit 200 has a maximum air volume threshold value Gmax, and when the G-wind is greater than or equal to Gmax, the control unit 200 sends a warning signal and controls the power of the refrigeration assembly 900 to increase.
The control unit 200 calculates the total air quantity of the cooling fan 500, is convenient for comprehensively judging the cooling and heat dissipation conditions according to the total air quantity, correspondingly adjusts the power of the refrigerating assembly 900, and can timely warn when the abnormal condition occurs in the cooling fan 500 or the chain link unit 300, thereby preventing the damage of components caused by the overlarge overall load of the cooling motor.
The step S04 and the step S05 do not have a sequence, and the control unit 200 adjusts the power of the refrigeration assembly 900 together according to the determination of the two steps, so that the actual running situation of the refrigeration assembly 900 better meets the cooling requirement of the chain unit 300, the cooling effect is utilized to the maximum, and the energy consumption of the system is reduced.
Of course, the intelligent control system of the cooling fan of the present application is not limited to the above-described embodiment, and several other embodiments different from the intelligent control system of the cooling fan in the above-described embodiment are provided below.
In other embodiments of the intelligent control system of the cooling fan of the present application, different from the above-described embodiments, it is: the detection periods of the current detection module, the temperature detection module and the rotation speed detection module can be different, and the detection time can also have smaller difference, for example, 0.1 microsecond, and the operation judgment precision of the control unit is not affected.
In other embodiments of the intelligent control system of the cooling fan of the present application, different from the above-described embodiments, it is: the cooling fan is arranged in an air duct communicated with the outside, and the cooling fan can realize heat dissipation and cooling of the chain link units by discharging hot air outwards.
In other embodiments of the intelligent control system of the cooling fan of the present application, different from the above-described embodiments, it is: the control unit can also not calculate and judge the total heat and the total air quantity, and only adjusts the rotating speed of the cooling fan according to the corresponding relation between the IGBT core temperature and the converter chain current of each chain unit.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that, for those skilled in the art, the technical features of the above-described embodiments may be arbitrarily combined, and several variations and modifications may be made without departing from the spirit of the present application, and the combinations of these technical features should be considered as the scope of the present description as long as there is no contradiction. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. An intelligent control system of a cooling fan, which is applied to an SVG system, and is characterized in that i chain link units in the SVG system are more than or equal to 2 and are integers, and the intelligent control system comprises:
the current detection module is used for detecting the current of the current conversion chain of each chain link unit;
the temperature detection module is used for detecting the temperature of the IGBT inner cores in the chain link units;
the refrigerating unit comprises i groups of cooling fans, and each group of cooling fans is arranged in one-to-one correspondence with the chain link units and is used for cooling the chain link units;
the control unit can receive the current value signal fed back by the current detection module and the temperature value signal detected by the temperature detection module, and correspondingly control the start and stop of the cooling fan and the change of the rotating speed;
the current detection module detects the current of the current converting chain of each chain link unit in real time and feeds back a detected current value signal Ik to the control unit, the temperature detection module detects the temperature of the IGBT inner core of each chain link unit in real time and feeds back a detected temperature value signal Tk to the control unit, wherein k is more than 0 and less than i, and the control unit executes the following judging steps according to the received real-time feedback signals Ik and Tk:
step S01: before the cooling fan corresponding to the kth chain link unit is started, if M1-K1 is equal to or less than Ik, the control unit controls the cooling fan corresponding to the kth chain link unit to be started, wherein M1 and K1 are set constants;
step S02: after the cooling fan corresponding to the kth chain link unit is started, the initial rotating speed of the cooling fan corresponding to the kth chain link unit is nk, and if M2-K2 is Tk < Ik, the control unit controls the rotating speed of the cooling fan corresponding to the kth chain link unit to increase; if M2-k2×tk=ik, the control unit controls the rotation speed of the cooling fan corresponding to the kth link unit to be kept unchanged; if M2-K2×tk > Ik, the control unit controls the rotation speed of the cooling fan corresponding to the kth link unit to decrease, wherein M2 and K2 are set constants, and M1-K1×tk is less than M2-K2×tk.
2. The intelligent control system of a cooling fan according to claim 1, wherein a detection period of the current detection module is the same as a detection period of the temperature detection module.
3. The intelligent control system of cooling fans according to claim 1, further comprising a rotation speed detection module, wherein the rotation speed detection module is capable of detecting the rotation speed of each cooling fan in real time and feeding back the detected rotation speed value signal to the control unit.
4. The intelligent control system of a cooling fan according to claim 3, wherein the determining step performed by the control unit further comprises:
and S03, when the rotating speed of the cooling fan corresponding to the kth chain link unit is reduced to nk, the control unit controls the cooling fan corresponding to the kth chain link unit to be closed.
5. The intelligent control system of a cooling fan according to claim 3, wherein the refrigeration unit further comprises a refrigeration assembly capable of providing cool air to the cooling fan, the cooling fan blowing cool air toward the corresponding link unit to effect cooling.
6. The intelligent control system of a cooling fan according to claim 5, wherein the determining step performed by the control unit further comprises:
step S04: the control unit calculates the total heat generated by all the chain unit units in unit time, qheat=c×m (delta T1+ delta T2+ … + delta Ti), wherein delta T1, delta T2, … and delta Ti are temperature change values of all the chain unit units in unit time, and c and m are constants;
the control unit is provided with a minimum heat threshold Qmin and a maximum heat threshold Qmax, qmin is smaller than Qmax, when the Q heat is larger than or equal to Qmax, the control unit controls the power of the refrigerating assembly to be increased, and when the Q heat is smaller than Qmin, the control unit controls the power of the refrigerating assembly to be reduced.
7. The intelligent control system of a cooling fan according to claim 5, wherein the determining step performed by the control unit further comprises:
step S05: the control unit calculates the total air quantity G wind of all cooling fans in unit time, wherein G wind = f (n1+n2+ … +ni), f is an air quantity calculation coefficient, f is a constant, and n1, n2, … and ni are real-time rotating speeds of all the cooling fans;
the control unit is provided with a maximum air volume threshold Gmax, and when G air is larger than or equal to Gmax, the control unit sends out a warning signal and controls the power of the refrigeration assembly to be increased.
8. The intelligent control system of a cooling fan according to claim 5, wherein the cooling assembly is disposed in a cooling space, the cooling assembly is capable of cooling air in the cooling space, the cooling space is provided with air inlets corresponding to one side of each chain unit, and air outlets corresponding to the other side of each chain unit, the cooling fan is disposed at the air outlets, and the cooling fan is capable of blowing cool air in the cooling space from the air outlets to cool the chain units.
9. The intelligent control system of a cooling fan of claim 8, wherein the intelligent control system is co-located with the SVG system in a closed housing.
10. The intelligent control system of a cooling fan according to claim 1, wherein the detection period of the current detection module and the detection period of the temperature detection module are both in microsecond level.
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| CN202311445257.3A CN117177546A (en) | 2023-11-02 | 2023-11-02 | Intelligent control system of cooling fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117939840B (en) * | 2023-12-28 | 2024-06-18 | 广州德昕仪实验室设备科技有限公司 | Ventilation intelligent control cabinet system |
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| CN117939840B (en) * | 2023-12-28 | 2024-06-18 | 广州德昕仪实验室设备科技有限公司 | Ventilation intelligent control cabinet system |
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