WO2017202152A1

WO2017202152A1 - Fan control method and apparatus

Info

Publication number: WO2017202152A1
Application number: PCT/CN2017/080242
Authority: WO
Inventors: 崔云锋; 陈继良
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-24
Filing date: 2017-04-12
Publication date: 2017-11-30
Also published as: CN107420332A

Abstract

A fan control method and apparatus. The method comprises: acquiring indication information from a user for operating a fan, when it is determined that the indication information indicates the disconnection of the fan, acquiring a state value of the fan, and when the state value of the fan reaches a predetermined first threshold value, disconnecting the fan. According to the method, a safety state of a system can be acquired according to the state of a fan, so as to perform the operation of safely inserting and pulling out the fan, thereby improving the safety of the system.

Description

Method and device for controlling fan

Technical field

The present application relates to, but is not limited to, the field of forced air cooling technology, and more particularly to a fan control method and apparatus.

Background technique

At present, as the power density of electronic products increases and people's requirements for product noise continue to increase, the control of temperature redundancy is also required to be more precise. To minimize noise during normal operation of the equipment, the fan speed tends to work well to meet the long-term operating temperature requirements of all components in the system. At this time, if the system is to be maintained, especially when the fan module is being pulled out, it may cause the critical components in the system to quickly overheat and even cause damage to the device.

1 is a schematic structural diagram of a fan control device. As shown in FIG. 1 , the fan control device includes a fan module 01, a fan drive module 02, a fan control module 03, and a system temperature acquisition module 04, all of which adopt an MCU (Microcontroller Unit, micro The Control Unit)/CPU (Central Processing Unit) does some simple temperature data processing to control the fan speed.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The above technology does not control the insertion and removal of the fan, nor does it supervise whether the fan is in place. When the fan insertion and removal operation does not meet the requirements of the current device, it is extremely easy to cause damage to the device, or even cause damage. Fire.

This paper provides a fan control method and device, which can acquire the safety state of the system according to the state of the fan, thereby enabling the safe insertion and removal of the fan and improving the safety of the system.

In a first aspect, an embodiment of the present invention provides a method for controlling a fan, where the method includes:

Obtaining instructions for the user to operate the fan;

Determining, when the indication information is that the fan is disconnected, acquiring a state value of the fan;

When the state value of the fan reaches a predetermined first threshold, the fan is turned off.

The method for controlling the fan provided by the embodiment of the present invention, the method for obtaining the state value of the fan when the indication information is that the fan is disconnected is obtained by obtaining the indication information of the fan operated by the user, when the fan is When the state value reaches a predetermined first threshold, the fan is turned off. When the fan is performing the unplugging operation, the state value of the fan is first obtained. The state value is the security state of the relationship device. The fan can be inserted and removed only when the state value is safe. Improves the safety of the fan during the extraction process.

In an embodiment, after disconnecting the fan, the method further includes:

Obtaining a status value of the fan alarm. When the status value of the fan alarm reaches a predetermined second threshold, outputting an alarm message for prompting to connect the fan.

By monitoring the status of the fan after disconnection, the user is reminded to insert the fan in time to ensure the safety of the device.

In an embodiment, obtaining a status value of the fan includes:

Obtaining a value of at least one of an operation time of the fan or a temperature of a chip associated with the fan.

By obtaining the value of at least one of the running time of the fan or the temperature of the chip associated with the fan, it can be convenient for the user to determine whether the disconnection of the fan will cause damage to the device through the state values, thereby improving the Safety.

In an embodiment, when the state value of the fan reaches a predetermined first threshold, the fan is disconnected, including:

The fan is turned off when the acquired value of the operation time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold.

When the value of at least one of the operation time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold, the operation is simple, and the user is provided with convenience.

In one embodiment, the value of the fan alarm state is obtained. When the acquired value reaches a predetermined second threshold, an alarm message is output for prompting to connect the fan, including:

Obtaining a value of at least one of a disconnection time of the fan or a temperature of a chip associated with the fan, and outputting when the acquired disconnection time of the fan or the temperature of the associated chip reaches a predetermined second threshold Alarm information for prompting to connect the fan.

Monitoring by obtaining the value of at least one of the off time of the fan or the temperature of the chip associated with the fan. If the value of the alarm state reaches a value that would damage the device, an alarm message is given to remind the user to insert the time in time. Fans to ensure the safety of the equipment.

In an embodiment, the method further includes: after the determining the indication information is that the fan is disconnected after the fan is disconnected, the method further includes:

The rotation speed of the fan is set to a predetermined rotation speed to bring the state value of the fan to a predetermined first threshold.

When the state of the fan is not in the safe state, the fan may be set to a predetermined speed by setting the speed of the fan, so that the state of the fan reaches a predetermined first threshold, that is, a safe state is reached, so that the fan can be inserted. Pull out the operation. In a second aspect, an embodiment of the present invention provides a device for controlling a fan, where the device includes: an indication module, a control module, and a switch module;

The indication module is configured to obtain indication information that the user operates the fan;

The control module is configured to determine that the indication information is a state value of the fan when the fan connection is disconnected;

The switch module is configured to disconnect the fan when the state value of the fan reaches a predetermined first threshold.

An apparatus for controlling a fan according to an embodiment of the present invention includes: an indication module, a control module, and a switch module, where the indication module is configured to acquire indication information of a user operating a fan, and the control module is configured to determine the indication When the information is that the fan is disconnected, the state value of the fan is obtained, and the switch module is configured to disconnect the fan when the state value of the fan reaches a predetermined first threshold. When the fan is performing the unplugging operation, the state value of the fan is first obtained. The state value is the security state of the relationship device. The fan can be inserted and removed only when the state value is safe. Improves the safety during fan extraction.

In one embodiment, the apparatus further includes: an alarm module;

The alarm module is configured to acquire a value of the fan alarm state after the switch module disconnects the fan, and output an alarm message when the state value of the fan alarm reaches a predetermined second threshold. Prompt to connect the fan.

In one embodiment, the control module is configured to obtain a value of at least one of an operating time of the fan or a temperature of a chip associated with the fan.

In one embodiment, the switch module is configured to disconnect the fan when the acquired value of the operating time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold .

In one embodiment, the alarm module is configured to acquire a value of at least one of an off time of the fan or a temperature of a chip associated with the fan, when the off time of the fan is acquired or an associated chip When the temperature reaches a predetermined second threshold, an alarm message is output for prompting the connection of the fan.

In an embodiment, the control module is further configured to: after determining that the indication information is that the fan is disconnected, setting a rotation speed of the fan to a predetermined rotation speed, so that a state value of the fan reaches a predetermined first Threshold.

When the state of the fan is not in the safe state, the fan may be set to a predetermined speed by setting the speed of the fan, so that the state of the fan reaches a predetermined first threshold, that is, a safe state is reached, so that the fan can be inserted. Pull out the operation.

Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions, the method of implementing the fan control when the computer executable instructions are executed by a processor.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic structural view of a fan control device;

FIG. 2 is a schematic flowchart diagram of Embodiment 1 of a method for controlling a fan according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of Embodiment 1 of a device for controlling a fan according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of Embodiment 2 of a device for controlling a fan according to an embodiment of the present invention.

Detailed

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The method according to the embodiment of the present invention may be applied to a device provided with a fan, and the device may be a computer, a server, a large device, or the like, but is not limited thereto.

The technical solutions of the present application are described in detail below by way of examples. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

FIG. 2 is a schematic flowchart diagram of Embodiment 1 of a method for controlling a fan according to an embodiment of the present disclosure. This embodiment relates to a process of state control when a fan performs a plugging operation. As shown in Figure 2, the method includes:

S101. Obtain indication information that the user operates the fan.

The indicator module of the fan is used to obtain the indication information of the fan operated by the user. For example, the user can click the information of the button that is inserted and removed by the fan to give the operation instruction information of the fan, and the fan can be inserted or removed. It is the insertion and removal operation of multiple fans, which can be determined according to the situation, but it is not limited to this.

S102. Determine, when the indication information is that the fan is disconnected, obtain a state value of disconnecting the fan.

The control module of the fan obtains the indication information of the user. When the indication information is that the fan connection is disconnected, an indicator may be set according to the actual situation to indicate that the fan is in a ready state. The fan is in a connected state, generally closed by a mechanical lock or an electromagnetic lock, and is restricted from being pulled out. For a fan, its main function is to cool the chip in the device when the fan is pulled out. When it is out, the safety state of the device is evaluated, that is, the state value of the fan is obtained. Therefore, all the fan speeds in the device can be set to a predetermined speed first, so that the temperature environment of the device is safe. State, in which the user can set the speed regulation strategy of the fan according to the heat dissipation requirements of the device. Generally, when the temperature of the key device such as the chip or the processor is low, the device will take a low wind speed rotation, when the device is chip or processed. When the temperature of the key device is high, the wind will rotate at a higher wind speed. There will be multiple gear positions in the middle, or the fan will be linearly changed to dynamically adjust the temperature of the key components such as the chip or processor in the system, and monitor the real-time. The temperature of the device determines the state value of the fan to be disconnected, and obtains the state value of the fan, and the state value may be a fan Value of the temperature or time of the fan associated with at least one chip, i.e., allowing users to understand if the moment to pull out the fan, will not cause damage to the device, therefore, real-time monitoring of the fan off-state value.

S103. When the state value of the fan reaches a predetermined first threshold, the fan is turned off.

When the control module of the fan monitors that the state value of the fan is in compliance with the security state of the device, the security state may set a threshold according to the situation, that is, the first threshold, and an indicator that can set a fan state. To indicate that the fan is in a safe state, you can open the mechanical lock or electromagnetic lock of the fan and pull out the fan.

A method for controlling a fan according to an embodiment of the present invention. The method obtains the indication information of a fan operated by a user, and determines that the indication information is that the fan is disconnected, and the fan is obtained. The state value, when the state value of the fan reaches a predetermined first threshold, then the fan is turned off. When the fan is performing the unplugging operation, the state value of the fan is first obtained. The state value is the security state of the relationship device. The fan can be inserted and removed only when the state value is safe. Improves the safety of the fan during the extraction process.

On the basis of the foregoing embodiment, after the connection of the fan is disconnected in the foregoing step 103, the method further includes:

After the fan is disconnected, the control module of the fan monitors the security state of the device after the fan is disconnected, that is, obtains the status value of the fan alarm, and gives an alarm prompt if there is an emergency. The status value may be the length of time that the fan is disconnected or at least one of the temperature of the key device such as the chip or the processor in the device to express the status value of the alarm. When the alarm module of the fan is aware of the alarm status of the fan. When the warning threshold (ie, the second threshold) is reached, the fan is disconnected for too long or the temperature of the critical components such as chips and processors in the device is too high, which may easily lead to damage to the device. The alarm message reminds the user to insert the corresponding position fan in time. The alarm information may be a warning light alarm or a warning word alarm, but it is not limited thereto.

In the above embodiment, the travel switch can be used to detect whether the fan is in position, that is, whether it is in a connected state, and set a time by a timer, thereby detecting whether the fan is pulled out for a long time, and reminding the user to insert the fan in time. . It is also possible to add a battery solution to the control module to implement the alarm function, because the operation time of unplugging the fan is relatively short, and some CPUs have low-power modules, that is, only a small number of modules in the CPU are working when power is off, so The power consumption is relatively small. You can also add a control module to the chassis to implement the design. Since the MCU can implement the detection and alarm functions, it does not cause cost problems. When the fan is properly inserted into the fan slot, the fan alarm is cleared. The module is alerted and the device continues to work normally.

Obtaining, according to the foregoing embodiment, a status value of the fan, including:

The main function of the fan is to cool the chip in the device. When the fan is pulled out, it is safe to evaluate the security state of the device, that is, whether the state of disconnecting the fan is safe. Therefore, the fan is disconnected. The status value of the fan, such as the running time of the fan, the temperature of the chip associated with the fan, etc., and monitoring the values, wherein, in actual use, obtaining the state value of disconnecting the fan, that is, acquiring the device Measured ambient temperature + minimum temperature rise of the device. When the fan is ready for OK, that is, the lower temperature limit before the fan is pulled out (the lowest temperature of the device), the minimum temperature rise for the device is achieved by the fan at full speed. The minimum temperature minus the ambient temperature of the equipment at that time is the minimum temperature rise of the equipment at full speed. For example, the lowest temperature that the measured board can reach at full speed of the fan is 45 °C, and the laboratory environment at that time is 25 °C, then the minimum temperature rise is 20 °C, then the state that the fan is ready to be OK is "measured ambient temperature +20" °C". Therefore, the user can store the lower temperature limit of each chip in the fan control module, and compare with the data collected by the device temperature collecting module. When all the temperatures collected by the device temperature collecting module reach the lower limit, the fan indicator displays When the fan is ready to be OK, the switch mode can release the mechanical lock and the user can pull out the fan. Of course, the user can set a temperature threshold slightly higher than this temperature according to his own needs and experience, and increase some margin, thereby speeding up the operation of the fan, and does not affect the use.

The setting and method of the lower threshold described above is an example, and any technician skilled in the thermal design or related work may make a simple modification or propose a similar operation, and the design includes but is not limited to the lower limit of the above temperature. The setting of the value, the calculation of the other methods to achieve the lower limit of the temperature, is basically the lowest temperature for setting the normal operation of the device.

On the basis of the foregoing embodiment, when the state value of the fan reaches a predetermined first threshold, the fan is disconnected, including:

Wherein, when the acquired running time reaches a predetermined time threshold, the user may give a predetermined time threshold according to the actual situation or the experience in practice, and when the fan runs for a certain period of time according to the predetermined speed, the fan is pulled out. When the operation reaches a safe range, the connection of the fan can be disconnected, that is, the mechanical valve or solenoid valve of the fan is released.

It is also possible that when the acquired temperature of the associated chip reaches a predetermined time threshold, that is, the user can give a predetermined temperature threshold according to the actual situation or the experience in practice, when the fan runs for a certain period of time, the fan makes When the operation of unplugging the fan reaches a safe range, the connection of the fan can be disconnected, that is, the mechanical valve or the solenoid valve of the fan can be released.

When the value of at least one of the acquired operation time of the fan or the temperature of the chip associated with the fan reaches a predetermined threshold, the operation is simple, and the user is provided with convenience.

On the basis of the foregoing embodiment, the status value of the fan alarm is obtained. When the status value of the fan alarm reaches a predetermined second threshold, the alarm information for connecting the fan is prompted, including:

Obtaining a value of at least one of a disconnection time of the fan or a temperature of a chip associated with the fan, and prompting when the acquired disconnection time of the fan or the temperature of the associated chip reaches a predetermined second threshold Connect the alarm information of the fan.

The main function of the fan is to cool the chip in the device. After the fan is pulled out, the security state of the device after the fan is pulled out is also evaluated, that is, the state value of the fan alarm is obtained, especially in the fan. The disconnection time, the device is still running, this time monitors the impact on the operation of the device after the fan is pulled out, that is, monitors the status value of the fan alarm. The status value can monitor the disconnection time value of the fan or the fan association. The value of at least one of the temperature of the chip, wherein, in actual use, after the fan is pulled out, the state value of the fan alarm is obtained, that is, the measured ambient temperature of the device + the maximum temperature rise of the device is obtained, when the fan is The state of the alarm, that is, the upper temperature limit (the maximum temperature of the device) after the fan is pulled out, the maximum temperature rise of the device is the highest temperature that the device can withstand without damage, minus the ambient temperature at that time. The maximum temperature rise of the equipment, for example: the maximum temperature of the measured equipment is not damaged is 115 ° C, the laboratory environment at that time is 25 ° C Then the maximum temperature is 90 ℃, then the fan alarm status value is "Found ambient temperature + 90 ℃". Therefore, it is necessary to know the maximum temperature that the associated chip can reach when the fan is unplugged, that is, the temperature alarm. The threshold value is also obtained based on the data collected by the system temperature acquisition module. In use, the designer or the user inputs the highest temperature that each chip can withstand in the control module. This temperature can be passed through the junction. The mild thermal resistance is used for calculation, and the chip manual will have a detailed introduction. When the designer designs the system, it is experimentally verified that the internal integrated temperature sensor or the independent temperature sensor reaches a certain temperature value, the junction temperature reaches the upper limit of the normal working of the chip, and the temperature of the sensor is the fan temperature. Upper threshold of the alarm. When the temperature data of a chip collected by the system temperature acquisition module reaches this temperature value, the control module outputs an alarm signal, the fan alarm module starts to work, and a series of alarm operations such as sound and light alarms are issued, prompting the user that the system is unstable at this time. Now, you need to plug the fan back in time. Of course, the upper threshold in the actual operation will increase some margin, so that the user can prepare some time, for example, reduce the upper limit temperature by 5 ° C, so that when the 5 ° C reaches the system chip can not work normally, the fan will alarm, the user The fan can be plugged in during this time.

On the basis of the foregoing embodiment, after the determining the indication information is that the fan is disconnected, the method further includes:

The setting and method of the upper threshold described above is an example, and any technician of a thermal design or related job may perform a simple modification or propose a similar operation, and the design includes but is not limited to the above temperature upper limit. The setting of the other methods to achieve the upper temperature limit is basically the highest temperature for setting the normal operation of the system.

When the obtained disconnection time reaches a predetermined time threshold, the threshold may be summarized according to actual conditions or experience in practice, and a predetermined time threshold is given. When the fan is pulled out for a period of time, if the device is in the device, When the temperature reaches a device that will damage the device, you can prompt an alarm message to connect the fan.

When the acquired temperature of the associated chip reaches a predetermined temperature threshold, the threshold may be summarized according to actual conditions or experience in practice, giving a predetermined temperature threshold when the fan After a period of time has elapsed, if the temperature in the device reaches a level that will damage the device, an alarm message can be sent to connect the fan.

FIG. 3 is a schematic structural diagram of Embodiment 1 of a device for controlling a fan according to an embodiment of the present invention. As shown in FIG. 3, the device includes: an indication module 10, a control module 20, and a switch module 30;

The indication module 10 is configured to obtain indication information that the user operates the fan;

The control module 20 is configured to: when determining that the indication information is that the fan is disconnected, acquire a state value of the fan;

The switch module 30 is configured to disconnect the fan when the state value of the fan reaches a predetermined first threshold.

As shown in Figure 3, on the basis of the above embodiment, the device further includes: an alarm module 40;

The alarm module 40 is configured to acquire a state value of the fan alarm. When the state value of the fan alarm reaches a predetermined second threshold, an alarm message is output for prompting connection of the fan.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

On the basis of the foregoing embodiment, the setting of the control module 20 to obtain the state value of the fan means:

The control module 20 is configured to acquire a value of at least one of an operation time of the fan or a temperature of a chip associated with the fan.

On the basis of the foregoing embodiment, the switch module 30 is configured to disconnect the fan when the state value of the fan reaches a predetermined first threshold, which means:

The switch module 30 is configured to disconnect the fan when the acquired value of the operating time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold

On the basis of the foregoing embodiment, the alarm module 40 is configured to acquire a value of the fan alarm state. When the value of the fan alarm state reaches a predetermined second threshold, an alarm message is output for prompting the connection. The fan refers to:

The alarm module 40 is configured to acquire a value of at least one of an off time of the fan or a temperature of a chip associated with the fan, when the obtained disconnection time of the fan or the temperature of the associated chip reaches a predetermined value At the second threshold, an alarm message is output for prompting the connection of the fan.

FIG. 4 is a schematic structural diagram of Embodiment 2 of a device for controlling a fan according to an embodiment of the present invention. As shown in FIG. 4, the actual use of the device in the device is described in detail below:

The device includes: a fan control module 400, at least one fan module 41, a fan driving module 42, a fan in-position detecting module 43, a system temperature collecting module 44, a fan status indicator 45, a fan alarm module 46, a fan plug button 47, and Fan mechanical lock 48.

Among them, the main function of the fan plug button 47 is to inform the control module of the idea that the user wants to insert and remove the fan. The implementation is mainly to send a switch amount or a high-low level change through a button or the like or The fan control module 400 is informed of a change in the analog signal or the like.

The button or the switch described in this embodiment may be a series of devices capable of providing a switch amount (high and low level change) to the fan control module 400, such as a button, a button, a ship switch, a dial code, etc., and may also provide PWM. A device that feeds a dog signal, a level flip, a bus mode, an analog signal, etc., but is not limited to the above devices.

The position of the switch is on the front panel of the fan, but is not limited to the front panel position and can be any convenient location for the customer to operate.

The system temperature collecting module 44 refers to a temperature collecting system integrated by a key device integrated in a device system and a temperature sensor (a dedicated temperature sensor) in the system, and the temperature collecting system includes the two collecting modes. One or two, but not limited to the two acquisition methods described, but also other ways to collect internal temperature information of the system.

The main function of the fan driving module 42 is to provide stable power supply for the fan operation, and receive the control signal sent by the fan control module 400 to control the switch of the fan and the rotation speed of the fan. The function of the receiving fan control module 400 to send signals and the fan board The function in the middle is a unified function, and the function selection can be placed in one of the two modules during the actual operation.

The fan driving module 42 may be a special fan driving chip, or may be a driving circuit composed of a triode or a MOS (Metal Oxide Semiconductor) single or combined tube, but is not limited to the above driving scheme.

The main function of the fan status indicator 45 is to indicate the current state of the fan. When the fan control module 400 receives the operation of the fan insertion button, the fan enters the preparation process. The indicator is mainly used to display the fan at this time. The state in which the user knows the current state of the fan.

The fan status indicator 45 includes two indication parts: “fan ready for OK” and “fan preparation”. The two modules can be implemented by means of indicators. The color definition is used to see the actual usage, but it can also be used by some users. The way to the user, such as sound, electrical signals (the signal can be PWM (Pulse Width Modulation) signal, can learn to feed the dog signal, can be level flip, can be bus mode, can be analog Signals, etc., including but not limited to the above signals), displayed through a display, etc., include but are not limited to the manner described.

The function of the fan mechanical lock (or electromagnetic lock) 48 is to limit the fan pullout. The normal state is to prevent the fan from being pulled out. After receiving the signal of the fan control module 400 releasing the fan, the fan is released, so that the fan can be normally pulled out.

This module can be realized by means of mechanical switches and uses electromagnetic relays, coils or other modules to control the unlocking of the mechanical lock. This module can also directly control the fan's "no pull out" and "pull out" states through the electromagnetic relay. The module includes the above-mentioned two methods of controlling the "no pull out" and "pull out" of the control fan, but is not limited to these two modes.

The fan in-position detecting module 43 can determine whether the fan is in position and finally provide an electrical signal to the fan control module 400.

The in-position detection signal can be added through the limit switch, the button, the mechanical structure control circuit, and the board (the signal can be a PWM signal, can be used to feed the dog signal, can be level-inverted, can be a bus mode, can be an analog signal, etc. The signals include, but are not limited to, the above signals, etc. to implement the functions of the modules, but are not limited to the manners described in this document.

The fan module 41 is a system heat dissipation module composed of a fan, and may be a single fan or a combination of multiple fans. The same may be a fan board in which multiple fans are combined. The module may add a conversion circuit or the like of the signal of the fan control module 400, but it is not necessary for the design of the module. Similarly, the design includes the fan and the combination described above, but is not limited to the description of the present design.

The fan alarm module 46 is composed of an acoustic alarm module and an optical alarm module, and is mainly used for an alarm function after the fan is pulled out for a long time. When the fan is pulled out for a long time, or the temperature monitored by the system temperature acquisition module has reached the set threshold, an audible and visual alarm is issued.

The module includes one or both of the sound and light alarm modules, but is not limited to the two kinds of alarms, and may provide an alarm to the user by other means, for example, by an electrical signal (the signal may be a PWM signal, It can be used to feed the dog signal, can be level flipped, can be bus mode, can be analog signal, etc., including but not limited to the above signals), display through configuration software, monitoring through the display and pop-up operation, and the like.

The processor of the fan control module 400 can be a CPU, an MCU, or an FPGA. (Field-Programmable Gate Array), CPLD (Complex Programmable Logic Device), SOC (System on Chip), ARM (Advanced RISC Machines, Advanced Reduced Instruction Set) One or a combination of a series of processors or controllers, but is not limited to the types described. The fan control module 400 is the control center of the entire fan board and is mainly responsible for the following functions:

(1) Interrupt signal processing of the plug-in fan button

The signal sent by the fan plug-in button 47 is collected, and the fan plug-in terminal preparation operation is started in time.

(2) Temperature data acquisition and processing

The critical device temperature and independent temperature sensor inside the system are monitored, and the collected temperature data is processed and analyzed to implement the relevant speed regulation strategy. The acquisition method may be by querying the registers of key devices inside the system, querying the data of independent temperature sensors inside the system, etc., but is not limited to the several acquisition modes.

(3) Fan speed control and fan speed control strategy setting

The speed of the fan is adjusted by providing a control signal to the fan drive module 42. The signal may be a PWM signal, may be a dog feed signal, may be level flipped, may be a bus mode, may be an analog signal, etc., the signal includes However, it is not limited to the above signals.

The user can set the speed regulation strategy of the fan according to the requirements of the system for heat dissipation. Generally, when the temperature of the key components in the system is low, the wind speed will be rotated at a low speed. When the temperature of the key components in the system is high, the wind speed will be adopted. Rotate, there will be multiple gear positions in the middle, or a linear change of the fan will be adopted to dynamically adjust the temperature of the key components in the system.

(4) Temperature alarm threshold setting for fan pullout

The temperature alarm threshold for fan extraction is calculated based on each system.

For the lower limit of the temperature alarm threshold, the minimum temperature that can be reached by the fan at full speed is first known. In the actual use process, the state value of the fan is obtained, that is, the measured ambient temperature of the device is obtained. Temperature rise, when the fan is ready to be OK, that is, the lower temperature limit before the fan is pulled out (the lowest temperature of the device), the minimum temperature rise for the device is the lowest temperature that can be achieved at the full speed of the fan in the device minus the device at that time. Ambient temperature The minimum temperature rise of the device at full speed. The designer or the user stores the lower temperature limit of each photo in the fan control module, and compares it with the data collected by the system temperature collecting module. When all the temperatures collected by the system temperature collecting module reach the lower limit, the fan indicator displays The fan is ready for OK, the control module releases the mechanical lock, and the user can pull out the fan. Of course, the user can set a temperature threshold slightly higher than this temperature according to his own needs and experience, and increase some margin, thereby speeding up the operation of the fan, and does not affect the use.

The upper threshold of the temperature alarm is also obtained based on the data collected by the system temperature acquisition module. In the actual use process, after the fan is pulled out, the state value of the fan alarm is obtained, that is, the measured ambient temperature of the device is obtained. + The maximum temperature rise of the device. When the fan is in the state of alarm, that is, the upper temperature limit of the fan (the maximum temperature of the device). For the maximum temperature rise of the device, it is the highest temperature that the device can withstand without damage. Subtracting the ambient temperature at that time is the maximum temperature rise of the device. In use, the designer or user inputs the highest temperature that each chip can withstand in the control module. This temperature can be performed by junction temperature and thermal resistance. Calculated, there will be a detailed introduction in the chip manual. When the designer designs the system, it is experimentally verified that the internal integrated temperature sensor or the independent temperature sensor reaches a certain temperature value, the junction temperature reaches the upper limit of the normal working of the chip, and the temperature of the sensor is the fan temperature. Upper threshold of the alarm. When the temperature data of a chip collected by the system temperature acquisition module reaches this temperature value, the control module outputs an alarm signal, the fan alarm module starts to work, and a series of alarm operations such as sound and light alarms are issued, prompting the user that the system is unstable at this time. Now, you need to plug the fan back in time. Of course, the upper threshold in the actual operation will increase some margin, so that the user can prepare some time, for example, reduce the upper limit temperature by 5 ° C, so that when the 5 ° C reaches the system chip can not work normally, the fan will alarm, the user The fan can be plugged in during this time.

The setting and method of the upper and lower thresholds described above are an example, and any technician of a thermal design or related job may perform a simple modification or propose a similar operation, and the design includes but is not limited to the above upper and lower limits. The setting of the value, for the calculation of other methods to achieve the setting of the upper and lower limits of the temperature, is basically the lowest temperature and the highest temperature for setting the normal operation of the system.

(5) The output fan pulls out the timeout alarm signal, and controls the alarm module to work and cancel the alarm.

When the fan control module 400 detects that the system temperature reaches the upper limit of the temperature alarm, it sends an alarm signal, which may be a PWM signal, can be used to feed the dog signal, can be level-inverted, can be a bus mode, can be an analog signal, etc. The alert signal includes, but is not limited to, the manner described. When the fan control module 400 detects that the fan is in position, that is, the fan has been normally inserted into the fan slot, the fan control module 400 clears the fan alarm signal.

(6) Control the fan electromagnetic lock to limit the operation of the plug-in fan

When the fan reaches the lower limit of the system temperature alarm, that is, when the system has reached the state in which the fan can be pulled out, the fan control module 400 outputs a control signal, and the fan is released to enable the user to pull out the fan normally. In other cases, the mechanical lock is always They are all locked and cannot be pulled out.

(7) Judging whether the fan is in place

The fan control module 400 checks the fan in-position detection module at any time. When the fan in-position detection module 43 can normally provide an output signal or prompts the fan control module 400 to be in position through a mechanical module, a travel switch, etc., it is determined that the fan is normally in position, otherwise This indicates that the fan is damaged or not in place.

The device indicating module 10 can be disposed in the fan plug button 47, the control module 20 can be disposed in the fan control module 400, the switch module 30 can be disposed in the fan mechanical lock 48, and the alarm module can be disposed in the fan alarm module 46.

In this embodiment, when the fan performs the pull-out operation, the state value of the fan is first obtained, and the state value is a security state of the relationship device. The fan can be inserted and removed only when the state value is safe. Therefore, the safety of the fan during the pulling out process is improved, and the whole operation process is intelligent, efficient and reliable.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present application, and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

Claims

A method of fan control, the method comprising:

Obtaining instructions for the user to operate the fan;

Determining, when the indication information is that the fan is disconnected, acquiring a state value of the fan;

When the state value of the fan reaches a predetermined first threshold, the fan is turned off.
The method of claim 1, further comprising: after disconnecting the fan,

Obtaining a status value of the fan alarm. When the status value of the fan alarm reaches a predetermined second threshold, outputting an alarm message for prompting to connect the fan.
The method of claim 1, wherein obtaining a status value of the fan comprises:

Obtaining a value of at least one of an operation time of the fan or a temperature of a chip associated with the fan.
The method according to claim 3, wherein when the state value of the fan reaches a predetermined first threshold, the fan is disconnected, including:

The fan is turned off when the acquired value of the operation time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold.
The method according to claim 2, wherein the value of the fan alarm state is obtained, and when the state value of the fan alarm reaches a predetermined second threshold, an alarm message is output for prompting connection of the fan, including :

Obtaining a value of at least one of a disconnection time of the fan or a temperature of a chip associated with the fan, and outputting when the acquired disconnection time of the fan or the temperature of the associated chip reaches a predetermined second threshold Alarm information for prompting to connect the fan.
The method according to any one of claims 1 to 5, wherein, after the determining the indication information is that the fan is disconnected, the method further comprises:

The rotation speed of the fan is set to a predetermined rotation speed to bring the state value of the fan to a predetermined first threshold.
A fan controlled device, the device comprising: an indication module, a control module and a switch module;

The indication module is configured to obtain indication information that the user operates the fan;

The control module is configured to determine that the indication information is a state value of the fan when the fan connection is disconnected;

The switch module is configured to disconnect the fan when a state value of the fan reaches a predetermined first threshold.
The apparatus of claim 7 further comprising: an alarm module;

The alarm module is configured to acquire a value of the fan alarm state after the switch module disconnects the fan, and output an alarm message when the state value of the fan alarm reaches a predetermined second threshold. Prompt to connect the fan.
The apparatus of claim 7, wherein the control module is configured to obtain a value of at least one of an operating time of the fan or a temperature of a chip associated with the fan.
The apparatus according to claim 9, wherein

The switch module is configured to disconnect the fan when the acquired value of the operation time of the fan or the temperature of the chip associated with the fan reaches a predetermined first threshold.
The device according to claim 8, wherein

The alarm module is configured to acquire a value of at least one of an off time of the fan or a temperature of a chip associated with the fan, when the obtained disconnection time of the fan or the temperature of the associated chip reaches a predetermined number At the second threshold, an alarm message is output for prompting the connection of the fan.
The apparatus according to any one of claims 7 to 11, wherein

The control module is further configured to: after determining that the indication information is that the fan is disconnected, set the rotation speed of the fan to a predetermined rotation speed, so that the state value of the fan reaches a predetermined first threshold.
A computer readable storage medium storing computer executable instructions for performing the method of fan control of any of claims 1-6.