CN108873794B - Control equipment, system and method of cooling fan - Google Patents

Control equipment, system and method of cooling fan Download PDF

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Publication number
CN108873794B
CN108873794B CN201810765237.7A CN201810765237A CN108873794B CN 108873794 B CN108873794 B CN 108873794B CN 201810765237 A CN201810765237 A CN 201810765237A CN 108873794 B CN108873794 B CN 108873794B
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pwm
signal
path
control unit
pwm signal
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CN108873794A (en
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颜俐君
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Zhengzhou Yunhai Information Technology Co Ltd
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Zhengzhou Yunhai Information Technology Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/048—Monitoring; Safety
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • 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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Ventilation (AREA)

Abstract

The invention discloses a control device, a system and a method of a cooling fan, wherein the control device of the cooling fan comprises the following components: the system comprises a first path of PWM detection circuit, a second path of PWM detection circuit and a control unit; the first PWM detection circuit detects whether the first PWM signal is normal, and outputs the first PWM signal to the control unit when the first PWM signal is normal, otherwise outputs an invalid signal to the control unit; the second PWM detection circuit detects whether the second PWM signal is normal, and outputs the second PWM signal to the control unit when the second PWM signal is normal, otherwise outputs an invalid signal to the control unit; and the control unit is used for controlling the work of the cooling fan by using the other path of signal when judging that the received one path of signal is an invalid signal. In the circuit, if one path of PWM signal fails, the corresponding PWM detection circuit outputs an invalid signal to the control unit, the control unit identifies the invalid signal and controls the cooling fan by using the other path of PWM signal, so that the cooling fan can normally regulate the speed, and the power consumption and the noise generation are reduced.

Description

Control equipment, system and method of cooling fan
Technical Field
The invention relates to the technical field of automatic control, in particular to control equipment, a system and a method of a cooling fan.
Background
With the requirements of high performance and high expansion capability of storage devices in the fields of high performance computing, big data analysis and the like, an all-solid-state hard disk array using FLASH as a storage medium is gradually emerging. Higher performance means that higher power consumption is caused by the adoption of a CPU with stronger performance and more memory components, and therefore, the heat dissipation of the storage device is more and more important.
A heat dissipation fan is currently used to dissipate heat from a storage device. And controlling the rotating speed of the fan by using the PWM signal. In order to prevent the control signal from generating problems, the fan cannot work, and therefore the PWM signal adopts a double-path redundancy design. After comparing the two paths of PWM signals, the control unit controls the fan to work according to the path of PWM signal with higher frequency, so that normal heat dissipation of the storage device is ensured.
However, when two paths of PWM signals are designed at present, when one path fails, the failed path outputs a high-frequency PWM signal, and because the logic of the redundancy control is to select the path with higher frequency from the two paths of PWM signals to control the fan to work, no matter the other path outputs a PWM signal with low frequency or high frequency, the control unit can control the fan to work according to the high-frequency PWM signal, and at this time, the fan can rotate at full speed, resulting in the control unit consuming higher power and generating higher noise.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a control device, a system and a method for a cooling fan, when one path of PWM signal fails, the other path of PWM signal can be used for controlling the cooling fan to normally regulate the speed, so that the power consumption and the noise generation are reduced.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the present invention provides a control apparatus of a heat radiation fan, comprising: the system comprises a first path of PWM detection circuit, a second path of PWM detection circuit and a control unit;
the first PWM detection circuit is used for detecting whether a first PWM signal is normal or not, outputting the first PWM signal to the control unit when the first PWM signal is normal, and otherwise, outputting an invalid signal to the control unit;
the second PWM detection circuit is used for detecting whether the second PWM signal is normal or not, and outputting the second PWM signal to the control unit when the second PWM signal is normal, otherwise outputting an invalid signal to the control unit;
and the control unit is used for controlling the work of the cooling fan by using the other signal when judging that the received signal is an invalid signal.
Optionally, the control unit is configured to control the cooling fan to work by using a channel of PWM signal with a higher frequency when it is determined that the received two channels of signals are both PWM signals.
Optionally, the detecting of the first PWM signal by the first PWM detecting circuit includes:
the first PWM detection circuit detects whether the frequency of the first PWM signal is within a preset frequency range, and if the frequency of the first PWM signal exceeds the preset frequency range or cannot be identified, the first PWM signal is determined to have a fault;
the second PWM detecting circuit detects whether the second PWM signal is normal, and specifically includes:
and the second PWM detection circuit detects whether the frequency of the second PWM signal is within a preset frequency range, and if the frequency exceeds the preset frequency range or cannot be identified, the second PWM signal is determined to have a fault.
Optionally, the invalid signal is 0.
Optionally, the control device of the cooling fan further includes: a first controller and a second controller;
the first controller is used for outputting the first path of PWM signals according to the ambient temperature;
and the second controller is used for outputting the second path of PWM signals according to the environment temperature.
Optionally, the control device of the cooling fan further includes: a temperature sensor;
the temperature sensor is used for obtaining the ambient temperature.
The present invention also provides a control system of a cooling fan, including the control device of the cooling fan, further including: a heat dissipation fan and a storage device;
and the control equipment of the heat radiation fan is used for controlling the heat radiation fan to radiate heat for the storage equipment.
Optionally, the cooling fan is installed on a frame of the storage device.
The invention also provides a control method of the cooling fan, which is applied to the control equipment of the cooling fan, and the control method comprises the following steps:
detecting whether a first path of PWM signal is normal, and outputting the first path of PWM signal to the control unit when the first path of PWM signal is normal, otherwise, outputting an invalid signal to the control unit; detecting whether a second path of PWM signals is normal, and outputting the second path of PWM signals to the control unit when the second path of PWM signals is normal, otherwise, outputting invalid signals to the control unit;
and when judging that the received signal is an invalid signal, controlling the work of the cooling fan by using the other signal.
Optionally, the invalid signal is 0.
Compared with the prior art, the invention has at least the following advantages:
the application provides a radiator fan's controlgear includes: the system comprises a first path of PWM detection circuit, a second path of PWM detection circuit and a control unit; the first PWM detection circuit is used for detecting whether a first PWM signal is normal or not, outputting the first PWM signal to the control unit when the first PWM signal is normal, and otherwise, outputting an invalid signal to the control unit; the second PWM detection circuit is used for detecting whether the second PWM signal is normal or not, and outputting the second PWM signal to the control unit when the second PWM signal is normal, otherwise outputting an invalid signal to the control unit; and the control unit is used for controlling the work of the cooling fan by using the other signal when judging that the received signal is an invalid signal. In the circuit, when one path of PWM signal fails, the corresponding PWM detection circuit outputs an invalid signal to the control unit, and the control unit of the circuit recognizes the invalid signal and controls the cooling fan to work by using the other path of PWM signal, so that the cooling fan can normally regulate the speed, and the power consumption and the noise generation are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a control device of a cooling fan according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a control device of a cooling fan according to a second embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control system of a cooling fan according to a third embodiment of the present application;
fig. 4 is a flowchart of a method for controlling a cooling fan according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the figure is a schematic structural diagram of a control device of a cooling fan according to an embodiment of the present application.
The control device of radiator fan that this application embodiment provided includes: a first path of PWM detection circuit 101, a second path of PWM detection circuit 102 and a control unit 103;
the control unit 103 may be a PC or a server.
One end of the first path of PWM detection circuit 101 is connected to the control unit 103; one end of the second path of PWM detecting circuit 102 is connected to the control unit 103.
The first PWM detection circuit 101 is configured to detect whether a first PWM signal is normal, and when the first PWM signal is normal, output the first PWM signal to the control unit 103, otherwise output an invalid signal to the control unit 103;
the second PWM detection circuit 102 is configured to detect whether the second PWM signal is normal, and output the second PWM signal to the control unit 103 when the second PWM signal is normal, otherwise output an invalid signal to the control unit 103;
and the control unit 103 is configured to control the operation of the cooling fan by using the other path of signal when determining that the received one path of signal is the invalid signal.
It should be noted that, when one path of PWM signal fails, the control unit 103 sends an alarm signal to prompt the user to perform maintenance in time.
The control device of the cooling fan provided by the embodiment of the application has three working states, wherein the first working state is as follows: the first path of PWM signals is normal and the second path of PWM signals is normal; the second working state is as follows: the first path of PWM signal has a fault and the second path of PWM signal is normal; the third working state is as follows: the first path of PWM signals is normal and the second path of PWM signals has faults.
In order to facilitate understanding of different operating states of the control device of the cooling fan provided in the embodiments of the present application, the first operating state to the third operating state will be sequentially described in detail below.
The first working state: the first path of PWM signals is normal and the second path of PWM signals is normal.
When the first PWM signal is normal, the first PWM detection circuit 101 obtains a normal detection result of the first PWM signal, and outputs the first PWM signal to the control unit 103; when the second PWM signal is normal, the second PWM detection circuit 102 obtains a normal detection result of the second PWM signal, and outputs the second PWM signal to the control unit 103.
However, after the control unit 103 receives the first path of signal and the second path of signal, firstly, the control unit 103 determines that both the first path of signal and the second path of signal are PWM signals; then, the control unit 103 controls the operation of the cooling fan according to the first PWM signal and the second PWM signal.
There are various ways for the control unit 103 to control the operation of the cooling fan according to the first PWM signal and the second PWM signal. Three exemplary modes of operation will now be described.
The first way to control the operation of the cooling fan is: one path of PWM signal is preset as a decision signal, and when the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the decision signal. If the first path of PWM signal is preset as a decision signal, when the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the first path of PWM signal; if the second channel of PWM signals is preset as the decision signal, and when the control unit 103 determines that the first channel of PWM signals and the second channel of PWM signals are both PWM signals, the control unit 103 controls the operation of the cooling fan according to the second channel of PWM signals.
The second way to control the operation of the cooling fan is: and the control unit 103 is configured to control the operation of the cooling fan by using the one-path PWM signal with higher frequency when it is determined that the two received signals are both PWM signals. For example, if the frequency of the first PWM signal is f1 and the frequency of the second PWM signal is f2, if f1> f2, after the control unit 103 determines that the first PWM signal and the second PWM signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the first PWM signal; if f1 is f2, after the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the first path of PWM signal or the second path of PWM signal; if f1< f2, after the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the operation of the cooling fan according to the second path of PWM signal.
The second mode of controlling the operation of the cooling fan selects one path of PWM signal with higher frequency to control the operation of the cooling fan, so that the cooling fan is adjusted to a higher rotating speed, and the second mode of controlling the operation of the cooling fan has the advantages of best heat dissipation performance and is suitable for the control equipment of the cooling fan with high heat dissipation performance requirements.
The third way to control the operation of the cooling fan is: and the control unit 103 is configured to control the cooling fan to work by using the lower-frequency one of the PWM signals when it is determined that the two received signals are both PWM signals. For example, if the frequency of the first PWM signal is f1 and the frequency of the second PWM signal is f2, if f1> f2, after the control unit 103 determines that the first PWM signal and the second PWM signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the second PWM signal; if f1 is f2, after the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the cooling fan to operate according to the first path of PWM signal or the second path of PWM signal; if f1< f2, after the control unit 103 determines that the first path of signal and the second path of signal are both PWM signals, the control unit 103 controls the operation of the cooling fan according to the first path of PWM signal.
The third mode of controlling the operation of the cooling fan selects one path of PWM signal with lower frequency to control the operation of the cooling fan, so that the cooling fan is adjusted to a lower rotating speed, and the third mode of controlling the operation of the cooling fan has the advantages of minimum power consumption and suitability for energy-saving control equipment of the cooling fan.
The second working state: the first path of PWM signal has a fault and the second path of PWM signal is normal.
When the first PWM signal fails, the first PWM detection circuit 101 obtains a detection result of the first PWM signal failure, and outputs an invalid signal to the control unit 103; when the second PWM signal is normal, the second PWM detection circuit 102 obtains a normal detection result of the second PWM signal, and outputs the second PWM signal to the control unit 103.
However, after the control unit 103 receives the first path of signal and the second path of signal, firstly, the control unit 103 determines that the first path of signal is an invalid signal and the second path of signal is a PWM signal; then, the control unit 103 will control the operation of the heat dissipation fan according to the second path of PWM signal.
The third working state is as follows: the first path of PWM signals is normal and the second path of PWM signals has faults.
When the first PWM signal is normal, the first PWM detection circuit 101 obtains a normal detection result of the first PWM signal, and outputs the first PWM signal to the control unit 103; when the second PWM signal has a fault, the second PWM detection circuit 102 will obtain a detection result of the second PWM signal, and output an invalid signal to the control unit 103.
However, after the control unit 103 receives the first path of signal and the second path of signal, firstly, the control unit 103 determines that the first path of signal is a PWM signal and the second path of signal is an invalid signal; then, the control unit 103 controls the operation of the cooling fan according to the first PWM signal.
The application provides a radiator fan's controlgear includes: a first path of PWM detection circuit 101, a second path of PWM detection circuit 102 and a control unit 103; the first PWM detection circuit 101 is configured to detect whether a first PWM signal is normal, and when the first PWM signal is normal, output the first PWM signal to the control unit 103, otherwise output an invalid signal to the control unit 103; the second PWM detection circuit 102 is configured to detect whether the second PWM signal is normal, and output the second PWM signal to the control unit 103 when the second PWM signal is normal, otherwise output an invalid signal to the control unit 103; and the control unit 103 is configured to control the operation of the cooling fan by using the other path of signal when determining that the received one path of signal is the invalid signal. In the circuit, when one path of PWM signal fails, the corresponding PWM detection circuit outputs an invalid signal to the control unit 103, and the control unit 103 of the circuit recognizes the invalid signal and controls the operation of the cooling fan by using the other path of PWM signal, so that the cooling fan is normally adjusted in speed, and power consumption and noise generation are reduced.
Based on the control device for the cooling fan provided by the above embodiment, in order to automatically control the cooling fan, the embodiment of the present application further provides a control device for the cooling fan, which is described in detail below with reference to the accompanying drawings.
Example two:
referring to fig. 2, the figure is a schematic structural diagram of a control device of a cooling fan according to a second embodiment of the present application.
The control device of the cooling fan provided by the embodiment of the application comprises: a first path of PWM detection circuit 101, a second path of PWM detection circuit 102, a control unit 103, a first controller 201 and a second controller 202;
it should be noted that, the first PWM detection circuit 101, the second PWM detection circuit 102, and the control unit 103 in the control device provided by the present application are the same as those in the first embodiment, and are not described herein again.
The first controller 201 and the second controller 202 may be a microprocessor or a single chip microcomputer.
A first end of the first PWM detection circuit 101 is connected to the first controller 201, and a second end of the first PWM detection circuit 101 is connected to the control unit 103; the first controller 201 outputs a first PWM signal.
A first end of the second PWM detection circuit 102 is connected with the second controller 202, and a second end of the second PWM detection circuit 102 is connected with the control unit 103; wherein the second controller 202 outputs the second PWM signal.
The first controller 201 is configured to output the first PWM signal according to an ambient temperature;
the second controller 202 is configured to output the second PWM signal according to the ambient temperature.
The working process of the control equipment of the cooling fan provided by the embodiment of the application specifically comprises the following steps: firstly, according to the ambient temperature, the first controller 201 outputs a first path of PWM signals and the second controller 202 outputs a second path of PWM signals; secondly, the first PWM detection circuit 101 detects whether the first PWM signal is normal and outputs the corresponding first PWM signal to the control unit 103 according to the detection result, and the second PWM detection circuit 102 detects whether the second PWM signal is normal and outputs the corresponding second PWM signal to the control unit 103 according to the detection result; then, the control unit 103 determines whether the first path of signal and the second path of signal are invalid signals, and controls the cooling fan to work by using the other path of signal when determining that the received one path of signal is invalid; and when the received two paths of signals are judged to be PWM signals, controlling the work of the cooling fan by using one path of PWM signal with higher frequency.
The disable signal is for marking the defective PWM signal so that the defective PWM signal is distinguished from the normal PWM signal, and thus the disable signal may be represented by a specific symbol. For example, the invalid signal is 0.
When a PWM signal fails, the PWM signal may not be recognized, and when a failed PWM signal can be recognized, the frequency of the PWM signal will be a high frequency or a low frequency. Therefore, in the control device, the method for the PWM detection circuit to detect whether the corresponding one of the PWM signals is normal may be to determine whether the PWM signal is normal according to the frequency of the received PWM signal.
For example, the detecting of whether the first PWM signal is normal by the first PWM detecting circuit 101 specifically includes:
the first PWM detection circuit 101 detects whether the frequency of the first PWM signal is within a preset frequency range, and if the frequency exceeds the preset frequency range or cannot be identified, determines that the first PWM signal has a fault;
the second PWM detecting circuit 102 detects whether the second PWM signal is normal, and specifically includes:
the second PWM detection circuit 102 detects whether the frequency of the second PWM signal is within a preset frequency range, and if the frequency exceeds the preset frequency range or cannot be identified, determines that the second PWM signal has a fault;
the preset frequency range includes all frequencies of the PWM signal when the PWM signal is normal, and when the PWM signal fails, the frequency of the PWM signal is lower than the minimum value in the preset frequency range or higher than the maximum value in the preset frequency range.
For convenience of description and better understanding of the technical solutions provided by the present application for those skilled in the art, the following description will take the first PWM signal failure and the second PWM signal normal as examples.
Assuming that the preset frequency range is [ fmin, fmax ]; the frequency of the first path of PWM signal is f3, and f3 is fmin; the frequency of the second path of PWM signals is f4, and fmin < f4< fmax.
The working process of the control equipment of the cooling fan provided by the embodiment of the application is as follows:
first, the first controller 201 outputs a first PWM signal according to the ambient temperature, and the frequency of the first PWM signal is f 3; the second controller 202 outputs the second PWM signal according to the ambient temperature, and the frequency of the second PWM signal is f 4.
Then, when the first PWM detection circuit 101 detects that the frequency f3 of the first PWM signal is not within the preset frequency range [ fmin, fmax ], it determines that the first PWM signal has a fault, and outputs 0 as an invalid signal to the control unit 103; when the second PWM detection circuit 102 detects that the frequency f4 of the second PWM signal is within the preset frequency range [ fmin, fmax ], it is determined that the second PWM signal is normal, and the second PWM signal is output to the control unit 103.
Finally, the control unit 103 determines that the first path of signal is an invalid signal according to the signal 0 sent by the first path of PWM detection circuit 101, and determines that the second path of signal is a PWM signal according to the second path of PWM signal sent by the second path of PWM detection circuit 102, so that the control unit 103 controls the operation of the cooling fan by using the second path of PWM signal, and sends an alarm signal to prompt a user to timely overhaul the control device of the cooling fan.
Since the first controller 201 and the second controller 202 need to output the PWM signal according to the ambient temperature, a control device of the heat dissipation fan should have a means for collecting the temperature. For example, the control device of the cooling fan further includes a temperature sensor; the temperature sensor is used for obtaining the ambient temperature.
The control device of the cooling fan provided by the embodiment of the application further includes a first controller 201 and a second controller 202, where the first controller 201 is configured to output the first path of PWM signal according to an ambient temperature; the second controller 202 is configured to output the second PWM signal according to the ambient temperature. The control equipment can automatically output corresponding PWM signals according to the ambient temperature, so that the rotating speed of the cooling fan can be automatically adjusted. For example, the higher the ambient temperature, the higher the frequency of the PWM signal, and the greater the corresponding fan speed.
Based on the control device of the cooling fan provided by the above embodiments, embodiments of the present application provide a control system of the cooling fan, which is described in detail below with reference to the accompanying drawings.
Example three:
referring to fig. 3, the figure is a schematic structural diagram of a control system of a cooling fan according to a third embodiment of the present application.
The control system of radiator fan that this application embodiment provided includes: the control device 301, the cooling fan 302 and the storage device 303 of the cooling fan provided in the above embodiments;
the control device 301 of the heat dissipation fan is configured to control the heat dissipation fan 302 to dissipate heat for the storage device 303.
The storage device 303 will generate heat during use, thereby causing an increase in the temperature of the environment surrounding the storage device 303, however, the increase in the ambient temperature may affect the proper operation of the storage device 303 and even damage the storage device 303.
In order to improve the heat dissipation efficiency of the heat dissipation fan 302, the heat dissipation fan 302 needs to be installed around the storage device 303. For example, the heat dissipation fan 302 is mounted on a frame of the storage device 303.
The specific process of the control system of the cooling fan provided by the embodiment of the application is as follows: firstly, the control device 301 of the cooling fan outputs a first path of PWM signal and a second path of PWM signal according to the ambient temperature; secondly, the control device 301 of the cooling fan detects whether the first path of PWM signal and the second path of PWM signal are normal, and outputs the corresponding first path of signal and second path of signal to the control unit in the circuit according to the detection result; then, the control unit in the control device 301 of the cooling fan will respectively determine whether the two signals are invalid signals, and when it is determined that the received signal is an invalid signal, the other signal is used to control the cooling fan 302 to cool the storage device 303; when the two received signals are both PWM signals, the one PWM signal with higher frequency is used to control the heat dissipation fan 302 to dissipate heat for the storage device 303.
The control system of radiator fan that this application embodiment provided includes: the control device 301, the cooling fan and the storage device 303 of the cooling fan provided in the above embodiments; the control device 301 of the heat dissipation fan is configured to control the heat dissipation fan 302 to dissipate heat for the storage device 303. According to the ambient temperature, the system adjusts the rotating speed of the cooling fan 302 through the control device 301 of the cooling fan, so that the storage device 303 is effectively cooled, and the power consumption and the noise generation are reduced.
Based on the control device of the cooling fan provided by the above embodiments, embodiments of the present application provide a control method of the cooling fan, which is described in detail below with reference to the accompanying drawings.
Referring to fig. 4, the figure is a flowchart of a control method of a cooling fan according to an embodiment of the present application.
The control method of the cooling fan provided by the embodiment of the application is applied to the control device of the cooling fan provided by the embodiment, and comprises the following steps:
s401: detecting whether a first path of PWM signal is normal, and outputting the first path of PWM signal to the control unit when the first path of PWM signal is normal, otherwise, outputting an invalid signal to the control unit;
wherein the disable signal is used to mark the failed PWM signal so that the failed PWM signal is distinguished from the normal PWM signal, and thus the disable signal can be represented by a specific symbol. For example, the invalid signal is 0.
S402: detecting whether a second path of PWM signals is normal, and outputting the second path of PWM signals to the control unit when the second path of PWM signals is normal, otherwise, outputting invalid signals to the control unit;
it should be noted that: s401 and S402 have no fixed sequence, and can be performed with S401 and S402; or S402 can be performed first and then S401 can be performed; s401 and S402 may also be performed simultaneously.
S403: and when judging that the received signal is an invalid signal, controlling the work of the cooling fan by using the other signal.
The control method of the cooling fan provided by the embodiment of the application comprises the following steps: detecting whether a first path of PWM signal is normal, and outputting the first path of PWM signal to the control unit when the first path of PWM signal is normal, otherwise, outputting an invalid signal to the control unit; detecting whether a second path of PWM signals is normal, and outputting the second path of PWM signals to the control unit when the second path of PWM signals is normal, otherwise, outputting invalid signals to the control unit; and when judging that the received signal is an invalid signal, controlling the work of the cooling fan by using the other signal. When one path of PWM signal fails, the method replaces the path of PWM signal with an invalid signal to send the invalid signal to the control unit, then the control unit identifies the invalid signal and controls the cooling fan to work by using the other path of PWM signal, so that the cooling fan can normally regulate the speed, and the power consumption and the noise generation are reduced.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims (10)

1. A control apparatus of a heat dissipation fan, characterized by comprising: the system comprises a first path of PWM detection circuit, a second path of PWM detection circuit and a control unit;
the first PWM detection circuit is used for detecting whether a first PWM signal is normal or not, outputting the first PWM signal to the control unit when the first PWM signal is normal, and otherwise, outputting an invalid signal to the control unit;
the second PWM detection circuit is used for detecting whether the second PWM signal is normal or not, and outputting the second PWM signal to the control unit when the second PWM signal is normal, otherwise outputting an invalid signal to the control unit;
the control unit is used for controlling the work of the cooling fan by using the other path of signal when judging that the received one path of signal is an invalid signal;
when the first path of PWM signals and the second path of PWM signals are normal, the control unit controls the work of the cooling fan by using decision signals, and the decision signals are preset as the first path of PWM signals or the second path of PWM signals.
2. The control device of the heat dissipation fan according to claim 1, wherein the control unit is configured to control the heat dissipation fan to operate by using a higher-frequency PWM signal when it is determined that the two received signals are both PWM signals.
3. The apparatus for controlling a heat dissipation fan according to claim 1, wherein the first PWM detection circuit detects whether the first PWM signal is normal, and specifically includes:
the first PWM detection circuit detects whether the frequency of the first PWM signal is within a preset frequency range, and if the frequency of the first PWM signal exceeds the preset frequency range or cannot be identified, the first PWM signal is determined to have a fault;
the second PWM detecting circuit detects whether the second PWM signal is normal, and specifically includes:
and the second PWM detection circuit detects whether the frequency of the second PWM signal is within a preset frequency range, and if the frequency exceeds the preset frequency range or cannot be identified, the second PWM signal is determined to have a fault.
4. The control apparatus of a heat dissipation fan as recited in any one of claims 1 to 3, wherein the disable signal is 0.
5. The control apparatus of a heat dissipation fan as recited in any one of claims 1 to 3, further comprising: a first controller and a second controller;
the first controller is used for outputting the first path of PWM signals according to the ambient temperature;
and the second controller is used for outputting the second path of PWM signals according to the environment temperature.
6. The control apparatus of a heat dissipation fan as recited in claim 5, further comprising: a temperature sensor;
the temperature sensor is used for obtaining the ambient temperature.
7. A control system of a heat dissipation fan, comprising the control apparatus of a heat dissipation fan as recited in any one of claims 1 to 6, further comprising: a heat dissipation fan and a storage device;
and the control equipment of the heat radiation fan is used for controlling the heat radiation fan to radiate heat for the storage equipment.
8. The control system of claim 7, wherein the cooling fan is mounted on a frame of the storage device.
9. A control method of a heat radiation fan, applied to the control apparatus of a heat radiation fan according to any one of claims 1 to 6, comprising:
detecting whether a first path of PWM signal is normal, and outputting the first path of PWM signal to the control unit when the first path of PWM signal is normal, otherwise, outputting an invalid signal to the control unit; detecting whether a second path of PWM signals is normal, and outputting the second path of PWM signals to the control unit when the second path of PWM signals is normal, otherwise, outputting invalid signals to the control unit;
when judging that one path of received signal is an invalid signal, controlling the work of the cooling fan by using the other path of signal;
when the first path of PWM signals and the second path of PWM signals are normal, the control unit controls the work of the cooling fan by using decision signals, and the decision signals are preset as the first path of PWM signals or the second path of PWM signals.
10. The method as claimed in claim 9, wherein the disable signal is 0.
CN201810765237.7A 2018-07-12 2018-07-12 Control equipment, system and method of cooling fan Active CN108873794B (en)

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