WO2015176439A1 - 一种防尘网堵塞检测方法、系统及装置 - Google Patents

一种防尘网堵塞检测方法、系统及装置 Download PDF

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Publication number
WO2015176439A1
WO2015176439A1 PCT/CN2014/087145 CN2014087145W WO2015176439A1 WO 2015176439 A1 WO2015176439 A1 WO 2015176439A1 CN 2014087145 W CN2014087145 W CN 2014087145W WO 2015176439 A1 WO2015176439 A1 WO 2015176439A1
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WIPO (PCT)
Prior art keywords
speed
clogging
fan
air filter
rotational speed
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PCT/CN2014/087145
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English (en)
French (fr)
Inventor
李廷永
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14892493.9A priority Critical patent/EP3147632A4/en
Publication of WO2015176439A1 publication Critical patent/WO2015176439A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20181—Filters; Louvers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/444—Auxiliary equipment or operation thereof controlling filtration by flow measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan

Definitions

  • the invention relates to the technical field of heat dissipation of communication equipment, in particular to a method, a system and a device for detecting air clogging.
  • heat dissipation system is an air-cooled heat dissipation system. Air cooling is actually forced convection heat transfer. The fan continuously blows cold air into the device. Because there is hot air in the device, the temperature difference will occur, and the existence of the temperature difference will transfer the heat from the high temperature to the low temperature, so that the hot air in the device will flow out. Let the temperature of the device drop.
  • Dust-proof nets are generally installed between the fan and the equipment to prevent dust, especially for communication system equipment with high reliability requirements. Dust accumulation on the air filter can affect the heat dissipation performance of the device, which will affect the reliability of the device.
  • the existing communication equipment requires regular inspection and maintenance of the air filter to ensure the normal operation of the equipment, which requires a large labor cost.
  • the degree of clogging of the air filter is not the same.
  • Regular maintenance does not guarantee that the air filter will remain in a normal state forever. Therefore, it is necessary to provide a dust net clogging detection method to block the air filter. Timely alarms to remind users to perform maintenance work.
  • the related art mainly detects the clogging of the air filter by the following methods: collecting the speed of the fan and the wind speed parameter under the speed, obtaining the wind resistance characteristic parameter according to the speed of the fan and the wind speed parameter under the speed; according to the wind resistance characteristic parameter and the alarm
  • the threshold determines the degree of clogging of the air filter, which in turn generates an air filter alarm to remind the user to perform maintenance work.
  • this method is only applicable to the fixed fan speed cooling system, and is not suitable for the fan speed control system.
  • the wind speed adjusts the speed according to the temperature of the equipment, so the speed of the fan is changed.
  • the wind resistance characteristic parameter changes with the change of the fan speed, and the air filter blockage cannot be effectively recognized.
  • the embodiment of the invention provides a method, a system and a device for detecting the air filter clogging, which can solve the problems of the dust filter clogging detection method applicable to the fan speed regulation heat dissipation system in the related art, which is complicated, high in cost and small in application range.
  • an embodiment of the present invention provides a dust net clogging detecting method, including: detecting a first rotating speed when a wind turbine reaches a target value at a current ambient temperature; determining that at a current ambient temperature, When the air filter is in a certain degree of blockage, the fan makes the device temperature reach the second speed required by the target value; determining the difference between the first speed and the second speed, and obtaining the speed change range according to the difference; determining according to the speed change range The extent to which the air filter is currently blocked.
  • the method before detecting the first rotating speed when the fan reaches the target value at the current ambient temperature, the method further comprises: detecting that the air filter reaches a target when the air filter is at a specific blockage level at different ambient temperatures The required fan speed is obtained as the first correspondence between the ambient temperature and the fan speed;
  • Determining the second rotation speed required by the fan to reach the target value when the air filter is at a specific degree of clogging at the current ambient temperature includes: determining the degree of clogging of the air filter according to the current ambient temperature and the first correspondence relationship When the fan makes the temperature of the device reach the target fan speed, the fan speed is set to the second speed.
  • the particular degree of clogging is any degree of cleaning of the dust screen from clean to complete clogging, and including cleaning and complete clogging.
  • detecting the first rotational speed when the wind turbine reaches the target temperature at the current ambient temperature includes:
  • the setting manner of the initial rotation speed includes: setting an initial rotation speed of the wind turbine to a fixed value; or determining, according to the current ambient temperature and the first correspondence relationship, a fan required to make the device temperature reach a target value when the air filter is cleaned; Speed, set the fan speed to the initial speed of the fan.
  • the method before determining the degree of clogging of the air filter according to the magnitude of the change of the rotational speed, the method further includes: setting the same first severe clogging threshold for different ambient temperatures;
  • Determining the degree of clogging of the air filter according to the magnitude of the change of the rotational speed includes: determining whether the amplitude of the change of the rotational speed is greater than or equal to the first severe clogging threshold, and if so, determining that the air filter is severely blocked.
  • the method before determining the degree of clogging of the air filter according to the magnitude of the change of the speed, the method further includes: setting a second severe clogging threshold corresponding to different ambient temperatures, and obtaining a second correspondence between the ambient temperature and the second severe clogging threshold relationship;
  • Determining the degree of clogging of the air filter according to the magnitude of the change of the speed includes: determining a second severe clogging threshold according to the current ambient temperature and the second correspondence, determining whether the magnitude of the variability is greater than or equal to the determined second severe occlusion threshold, and if so, determining the defense The dust net is seriously blocked.
  • the method before detecting the first rotation speed when the wind turbine reaches the target value at the current ambient temperature, the method further includes: periodically detecting the actual rotation speed of the wind turbine at the current ambient temperature;
  • the method further includes: determining a difference between the actual speed of the fan and the second speed, The actual speed change amplitude; determine whether the actual speed change amplitude is greater than or equal to the second severe jam threshold corresponding to the current ambient temperature, and if so, it is determined that the air filter is severely blocked.
  • the embodiment of the present invention further provides a dust net clogging detecting system, comprising: a first speed determining module, a second speed determining module, a speed change amplitude determining module, and a clogging degree determining module;
  • the first rotational speed determining module is configured to detect a first rotational speed when the wind turbine causes the device temperature to reach the target value at the current ambient temperature;
  • the second rotational speed determining module is configured to determine a second rotational speed required by the wind turbine to bring the device temperature to the target value when the air filter is at a specific clogging degree at the current ambient temperature;
  • the speed change amplitude determining module is configured to determine a difference between the first speed and the second speed, and obtain a speed change range according to the difference;
  • the clogging degree determining module is configured to determine the current clogging degree of the air filter according to the magnitude of the change in the rotational speed.
  • the system further includes a first correspondence determining module, configured to detect a fan speed required to achieve a target temperature value of the air filter at a specific clogging degree under different ambient temperatures, and obtain an ambient temperature and The first correspondence between the fan speeds;
  • the second rotational speed determining module includes a second rotational speed determining sub-module, configured to determine, according to the current ambient temperature and the first correspondence relationship, a fan speed required for the fan to reach a target value when the air filter is at a specific clogging degree, and set The fan speed is the second speed.
  • the first rotational speed determining module includes an initial speed setting submodule and a speed regulating submodule;
  • the initial speed setting sub-module is used to set an initial speed for the fan
  • the speed control sub-module is configured to gradually adjust the fan speed based on the detected temperature of the device based on the initial speed, until the device temperature is less than or equal to the target value, and set the fan speed at this time to be the first speed.
  • the initial speed setting module includes a first initial speed setting sub-module or a second initial speed setting sub-module, the first initial speed setting sub-module is set to set the initial rotational speed of the fan to a fixed value; the second initial speed setting The sub-module is configured to determine, according to the current ambient temperature and the first correspondence relationship, a fan speed required for the fan to reach the target value when the air filter is cleaned, and set the fan speed to be the initial speed of the fan.
  • the system further includes a first severe congestion threshold setting module configured to set the same first severe congestion threshold for different ambient temperatures;
  • the clogging degree determining module includes a first determining module configured to determine whether the rotational speed change amplitude is greater than or equal to the first severe clogging threshold, and if so, determine that the air filter is severely blocked.
  • the system further includes a second severe congestion threshold setting module, configured to set a second severe congestion threshold corresponding to different ambient temperatures, and obtain a second correspondence between the ambient temperature and the second severe congestion threshold;
  • the clogging degree determining module includes a second determining module, configured to determine a second severe clogging threshold according to the current ambient temperature and the second corresponding relationship, and determine whether the rotational speed change amplitude is greater than or equal to the determined second severe occlusion threshold, and if yes, determine the dustproof The network is clogged.
  • the embodiment of the invention further provides an air filter clogging detecting device, comprising: an ambient temperature detecting module, a device temperature detecting module, a fan speed detecting module, a processing module and a storage module; and the ambient temperature detecting module is configured to detect the current ambient temperature;
  • the device temperature detecting module is set to detect the device temperature;
  • the fan speed detecting module is set to detect the rotating speed of the fan; when the device temperature detecting module detects that the temperature of the device reaches the target value, the processing module is notified, and the processing module is set to obtain from the fan speed detecting module.
  • the speed of the fan at this time is set to be the first speed;
  • the storage module is configured to store the relationship between the second speed and the ambient temperature, and the second speed is that the air filter reaches the target temperature when the air filter is in a certain degree of clogging.
  • the processing module is further configured to obtain a current ambient temperature from the ambient temperature detecting module, and obtain a second rotational speed of the fan corresponding to the current ambient temperature from the storage module;
  • the processing module is further configured to determine the first rotational speed relative to The difference between the second rotation speeds, the magnitude of the change in the rotational speed, Determining the degree of clogging of the air filter according to the current rotation speed variation width.
  • the storage module is further configured to store a first severe congestion threshold and/or a second severe congestion threshold; the first severe congestion threshold is the same threshold set for different ambient temperatures; the processing module is further configured to obtain from the storage module The first severe blocking threshold is determined, and it is determined whether the magnitude of the rotational speed change is greater than or equal to the first severe blocking threshold. If yes, it is determined that the air filter is severely blocked; the second severe blocking threshold is a threshold corresponding to different ambient temperatures; the processing module further After the current ambient temperature is obtained, the second critical congestion threshold corresponding to the current ambient temperature is obtained from the storage module, and it is determined whether the rotational speed change amplitude is greater than or equal to the determined second severe congestion threshold. If yes, the air filter is determined to be severely blocked. .
  • the dust net clogging detection method and system provided by the embodiments of the present invention can solve the problems of the dust filter clogging detection method applicable to the fan speed regulation heat dissipation system in the related art, which is complicated, high in cost, and small in application range.
  • the method proposed by the embodiment of the present invention mainly compares the fan speed adjusted by the fan under actual conditions and the fan of the fan in a specific clogging degree under the condition of the same ambient temperature and the same device temperature target value. The speed is used to determine the blockage of the air filter.
  • the method proposed by the embodiment of the invention only needs to measure the first rotational speed of the fan, and calculate the first rotational speed relative to the first The difference between the two speeds can determine the blockage of the air filter and does not require large expensive equipment. Therefore, the method provided by the embodiment of the invention is simple, low in cost, and wide in scope of application.
  • FIG. 1 is a schematic flowchart of a method for detecting an air filter clogging according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a dust net clogging detection method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic flowchart of a dust net clogging detecting method according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of a dust net jam detection system according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of another air filter clogging detection system according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic structural diagram of another air filter clogging detection system according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic structural diagram of another air filter clogging detecting system according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic structural diagram of a dust net jam detecting device according to Embodiment 5 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a method for detecting air filter clogging.
  • the method includes:
  • Step S101 Determine a first rotation speed when the wind turbine reaches the target value at the current ambient temperature.
  • the target value refers to the target value of the device temperature, that is, the target temperature or target temperature range that the device is required to reach, for example, the current temperature of the device is 60 degrees, and then the air-cooling heat dissipation system is turned on, and the user wants to make When the temperature of the device reaches 20 degrees, the target value of the device temperature is 20 degrees. If you want the temperature of the device to reach the range of 20-30 degrees, then the target value of the device temperature is 20-30 degrees.
  • This embodiment is directed to the same device, and in the related art, since the target values of the same device are the same, the present embodiment mainly describes the same target value of the same device. The same is true for the device whose target value is adjustable.
  • the first rotation speed when the fan reaches the target value refers to cooling the device by the air cooling and cooling system in actual application, and when the temperature of the device is lower than the target value to the first time to lower than the first time. The speed of the fan when it is equal to the target value.
  • Step S102 Determine the second rotation speed required by the fan to reach the target value when the air filter is at a specific degree of clogging at the current ambient temperature.
  • the degree of clogging is such that the dust screen is cleaned to complete clogging and contains any degree of cleanliness and complete clogging. Therefore, the specific degree of clogging of the air filter may be that the air filter is clean, slightly blocked, severely blocked, completely blocked, and the like.
  • the determined second rotation speed is the rotation speed required by the fan to make the equipment temperature reach the target value when the air filter is severely blocked at the current ambient temperature, if the first rotation speed of the fan is lower than the second rotation speed, the air filter is blocked. The degree is lower than severe blockage.
  • Step S103 determining a difference between the first rotation speed and the second rotation speed, and obtaining a rotation speed variation range according to the difference.
  • the determination of the second rotational speed may be determined by an experiment in advance, for example, detecting the fan speed required for the temperature of the device to reach the target value at a specific degree of clogging at each ambient temperature. Obtaining a first correspondence relationship between the ambient temperature and the fan speed; determining, according to the current ambient temperature and the first correspondence, a fan speed required to bring the temperature of the device to the target value, and setting the fan speed to be cleaned when the air filter is cleaned The second speed.
  • the first correspondence can be expressed in various forms, for example, in the form of a table. See Table 1.
  • the data in Table 1 is measured at a device temperature target of 20 degrees:
  • the correspondence between the ambient temperature and the fan speed required to bring the device temperature to the target value is measured according to an experiment or by parameter inference or artificial setting of the device. If the test is performed by an experiment, and the dust-proof net is cleaned as an example, the corresponding relationship can be determined by: cleaning the dust-proof net, placing the device in a space where the temperature can be adjusted, and creating a form, the table content. Including the ambient temperature and the fan speed required to bring the device temperature to the target value (generally for the same device, the device temperature target value is fixed, so here is the device temperature target value as a fixed value). The ambient temperature is from 23 degrees to 55 degrees and the target temperature of the device is set to 20 degrees.
  • the ambient temperature to a value and check the fan speed that causes the device temperature to reach the target value and fill it in the form. Starting from an ambient temperature of 23 degrees to an ambient temperature of 55 degrees, the fan speed at which the device temperature reaches the target value is detected once every other time.
  • the first correspondence includes the relationship between the ambient temperature, the target value of the device temperature, and the fan speed required to bring the device temperature to the target value, after determining the target values of the current ambient temperature and the device temperature.
  • the corresponding relationship determines the rotational speed of the fan, which can be set as the initial rotational speed of the fan. If the air filter is clean, the fan can use this initial rotational speed to achieve the device temperature target value. If the air filter is clogged, it will affect the heat dissipation effect. If the fan uses the initial speed to blow cold air to the device, the temperature of the device cannot be lower than or equal to the target value.
  • the wind turbine performs the fan speed according to the detected device temperature and target value. Adjust so that the wind blown onto the device can cause the device temperature to be below or equal to the target value.
  • Step S104 Determine the degree of clogging of the air filter according to the magnitude of the change in the rotational speed.
  • the manner in which the degree of clogging is judged is related to the setting of the degree of clogging of the air filter. For example, when the specific degree of clogging is set to be slightly blocked, it is only necessary to determine whether the difference between the first rotational speed and the second rotational speed is less than zero, and the clogging of the air filter can be determined. When the first rotational speed is relative to the second rotational speed When the difference is less than zero, it indicates that the first rotation speed is smaller than the second rotation speed, indicating that the degree of clogging of the air filter is lower than the slight clogging, and cleaning is not required at this time. This way of judging is very simple, but it is not easy to directly determine the degree of clogging for a situation greater than zero.
  • the specific clogging degree is set to be severely blocked, it is only necessary to determine whether the difference between the first rotational speed and the second rotational speed is greater than zero, and the clogging of the air filter can be determined.
  • the difference between the first rotational speed and the second rotational speed is greater than zero, the first rotational speed is greater than the second rotational speed, indicating that the degree of clogging of the air filter is more serious than severe blockage, and the air filter needs to be cleaned. .
  • Such a judgment method is not easy to directly determine the degree of clogging for a case of less than zero.
  • a clogging threshold may also be set, and the degree of clogging of the air filter may be determined by comparing the relationship between the difference between the first rotational speed and the second rotational speed (ie, the magnitude of the rotational speed change) and the occlusion threshold.
  • the blocking thresholds can be set to the same for different ambient temperatures; the corresponding blocking thresholds can also be set for different ambient temperatures. In the case where the clogging threshold is the same, in the present embodiment, the first clogging threshold is used.
  • the manner of determining the degree of clogging according to the magnitude of the change of the rotational speed is: determining whether the amplitude of the change of the rotational speed of the first rotational speed and the second rotational speed is greater than or equal to the first occlusion threshold, and if so, determining that the air filter is severely blocked.
  • the clogging threshold can be set according to the degree of clogging of the air filter when the alarm is required. Therefore, the clogging threshold is further divided into a severe clogging threshold and a slight clogging threshold.
  • the setting of the specific value of the clogging threshold also needs to be set according to the specific clogging degree of the air filter.
  • the severe clogging threshold needs to be set relatively large, and the slight clogging threshold can be set smaller.
  • the severe clogging threshold does not need to be set so large, even 0.
  • the clogging threshold can be determined experimentally. For example, at a certain temperature, the third speed required to make the temperature of the device reach the target value when the air filter is cleaned is detected, and the fan needs to be cleaned when the air filter is blocked.
  • the fourth rotational speed required to bring the device temperature to the target value, and the difference between the fourth rotational speed and the third rotational speed is set as the occlusion threshold.
  • the speed required for the fan to reach the target value of the device at this time can be set to the fourth speed.
  • the second occlusion threshold in this embodiment.
  • a second correspondence between the ambient temperature and the second blocking threshold is obtained. For example, the following table shows:
  • the second blocking thresholds corresponding to different ambient temperatures may be the same or different, which may be set according to actual conditions.
  • it is determined that the second clogging threshold is determined according to the current ambient temperature and the second correspondence, and whether the amplitude of the rotation of the first rotation speed and the second rotation speed is greater than or equal to the determined second clogging threshold, and if so, the defense is determined. The dust net is seriously blocked.
  • the second occlusion threshold needs to be determined according to the current ambient temperature and the established second correspondence, and then The magnitude of the change in the rotational speed is compared with the second occlusion threshold to determine whether the air filter needs to be cleaned.
  • an initial rotation speed may be set for the fan, and according to the detected temperature of the device, the fan rotation speed is gradually adjusted on the basis of the initial rotation speed, so that the device temperature is less than or equal to the target value, and the fan rotation speed at this time is set to be the first
  • the speed of the initial speed is set to: set the initial speed of the fan to a fixed value, and the fixed value may be 0; or select the second speed as the initial speed according to the current ambient temperature and the first correspondence.
  • the fan speed required for the fan to reach the target value when the air filter is cleaned is determined according to the current ambient temperature and the first correspondence relationship, and the fan speed is set to be the initial speed of the fan.
  • the fan rotational speed is gradually adjusted based on the initial rotational speed, so that the device temperature is less than or equal to the target value, and the fan rotational speed at this time is set as the first rotational speed.
  • the specific adjustment manner may be: determining whether the temperature of the device is lower than or equal to the target value, and if not, starting from the initial rotation speed, increasing the rotation speed of the fan step by step until the detected temperature of the device is lower than or equal to the target value.
  • the fan speed is the first speed of the fan.
  • the initial speed of the fan is set to the current ambient temperature, and the fan makes the temperature of the device when the air filter is cleaned.
  • the beneficial effect of the fan speed required to reach the target value is to reduce the frequency of the fan's temperature of the test equipment.
  • the fan can adjust the rotation speed to the second rotation speed to make The device temperature reaches the target value. If dust is accumulated on the dust-proof net, it will affect the heat dissipation effect of the fan. If the fan uses the second speed to dissipate heat from the device, the temperature of the device will not reach the target value. At this time, the fan will increase the speed and make the temperature of the device. Below or equal to the target value, the adjusted fan speed is the first speed.
  • the fan speed control strategy is based on a temperature sensitive point within the equipment.
  • the fan periodically detects the temperature of the device and determines whether the temperature of the device is lower than or equal to the target value (if the target value is a range, it is determined whether the temperature of the device is within the target value range) If not, increase the speed; then check the temperature of the device. If the temperature of the device is still greater than the target value of the device, increase the speed again, and cycle until the temperature of the device is lower than or equal to the target value.
  • the speed is the first speed of the fan.
  • the air filter In order to be able to detect the blockage of the air filter in time, it is also possible to periodically detect the actual speed of the fan at the current ambient temperature; and determine the difference between the actual speed of the fan and the second speed to obtain the actual speed change range; Whether the speed change amplitude is greater than or equal to the corresponding second severe jam threshold in the current environment, and if so, an alarm. In this way, the speed of the fan is monitored during the speed regulation of the fan. When the actual speed of the fan relative to the second speed is greater than or equal to the determined second severe blockage threshold, the air filter is blocked. Serious, it needs to be cleaned, so you can inform the user in time to let the user clean the air filter in time.
  • the fan speed can be expressed by the fan speed gear position, or the fan control word can be expressed as long as the feature quantity can characterize the fan speed.
  • the amplitude of the first speed of the fan relative to the second speed is: the difference between the gear position corresponding to the first speed of the fan and the gear corresponding to the second speed and the fan
  • the quotient of the total number of gear positions; the blockage threshold is a value.
  • the advantage of using the gear position to indicate the speed of the fan is that when the speed of the fan is detected, no special equipment is needed to detect the speed, and only the gear position of the fan needs to be known, which makes the detection method easier.
  • the fan gear position is represented by such a scheme, which is exemplified in the following embodiment 3. Please refer to the third embodiment.
  • the ambient temperature in this embodiment does not specifically refer to the ambient temperature of the device, but also the temperature that can characterize the ambient temperature, such as the temperature of certain objects in the environment, and the temperature of these objects varies with the ambient temperature. Changes vary, and do not change as the machine's fan speed changes. For example, the temperature of the fan, the temperature detected at the air inlet of the device, or the temperature detected at a certain point on the device board, or the temperature detected at a certain point on the control panel of the device fan.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a dust net detection method, which is an example of cleaning the air filter with a specific degree of clogging of the air filter. Please refer to Figure 2, including the following steps:
  • Step S201 In the case of cleaning the air filter, determine the correspondence between the ambient temperature, the device temperature target value, and the fan speed required to make the device temperature reach the target value; and set a severe jam threshold.
  • Step S202 detecting the current ambient temperature, determining a target value of the device temperature, and determining a second rotational speed of the fan according to the correspondence.
  • Step S203 setting the second rotation speed of the fan to the initial rotation speed, starting from the initial rotation speed, adjusting the fan rotation speed according to the temperature of the equipment and the target value of the equipment temperature; detecting the fan rotation speed at a timing, when the equipment temperature is less than or equal to the target value, setting The fan speed at this time is the first speed of the fan.
  • Step S204 It is determined whether the difference between the first rotation speed of the fan and the second rotation speed is greater than or equal to the severe congestion threshold. If yes, it is determined that the air filter is severely blocked, and it has reached the level of cleaning, and an alarm for cleaning the air filter is issued.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment provides a dust net clogging detection method.
  • the specific clogging degree of the air filter is taken as an example.
  • the rotation speed of the fan is represented by a gear position. Referring to FIG. 3, the following contents are included:
  • Step S301 designing an experiment to obtain a correspondence relationship between the ambient temperature, the target value of the device temperature, and the fan speed required to make the device temperature reach the target value in the case of cleaning the air filter; setting the target value of the device temperature For 20 ° C, the ambient temperature is set to 33 values, from 23 ° C to 55 ° C, the fan speed is expressed by the gear position.
  • the wind speed of the equipment temperature reaches 20 ° C is set to the lowest gear
  • the environment At a temperature of 55 ° C the wind speed at which the device temperature reaches 20 ° C is set to
  • the highest grade 33 files when the ambient temperature is between 24 °C and 54 °C, the fan speed gears correspond to one-to-one from 2nd to 32nd, and the total number of correspondences is 33.
  • the fan speed control strategy is not based on the ambient temperature speed regulation, but is adjusted according to a temperature sensitive point in the equipment;
  • Step S302 setting a blocking threshold of 16/33;
  • Step S303 detecting that the current ambient temperature is 33 ° C (if the ambient temperature is between the set upper and lower adjacent temperatures, the ambient temperature is taken as the lower limit value of the adjacent temperature, that is, the low temperature value, such as the ambient temperature is 23.6 ° C, located at 23 ° C -24 Between °C, according to the ambient temperature of 23 ° C). Set the device temperature target value to 20 ° C, according to the above correspondence, set the initial speed of the fan to 11 files;
  • Step S304 detecting whether the temperature of the sensitive point of the device reaches the target value, if not, executing step S305, and if yes, executing step S306;
  • Step S305 Up-regulating the fan speed gear position 1 step, and then performing step S304;
  • Step S306 determining whether the difference between the gear position of the current speed of the fan and the gear position of the initial speed of the fan is greater than the occlusion threshold, and if yes, executing step S307; if not, not processing;
  • Step S307 An alarm is issued.
  • the ambient temperature is in the range of 23 ° C - 39 ° C, and the difference between the current speed of the fan and the initial speed of the fan can be up to 16, that is, an effective air filter clogging alarm can be performed.
  • the clogging threshold is set to 16/32. This value can be adjusted according to actual needs. It is recommended to be no less than 16/32 and no more than 24/32. If you want to know the air filter blockage earlier, it is an air filter. If the maintenance time is sufficient, the setting value can be appropriately smaller. If you want to maintain the air filter for a longer period of time, you can ensure that the air filter is maintained in time. This setting value can be appropriately larger.
  • the blocking threshold can be set smaller, such as the ambient temperature of 45 ° C, the corresponding design gear is 23 files, if the 16-speed change is reported, the dust filter is blocked, because there are only 32 File, the threshold may be set to 1/4.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the system further includes a first correspondence determining module 405.
  • the first correspondence determining module 405 is configured to detect that when the air filter is in a certain degree of congestion at different ambient temperatures, The fan speed required to bring the device temperature to the target value is obtained as a first correspondence between the ambient temperature and the fan speed;
  • the second speed determining module 402 includes a second speed determining sub-module 4021, configured to be based on the current ambient temperature and the first The corresponding relationship determines the fan speed required for the fan to reach the target value when the air filter is in a certain degree of clogging, and sets the fan speed to the second speed.
  • the first rotational speed determining module 401 may further include an initial speed setting sub-module 4011 and a speed regulating sub-module 4012, as shown in FIG. 6.
  • the initial speed setting sub-module 4011 is configured to set an initial speed for the fan;
  • the speed adjusting sub-module 4012 is configured to gradually adjust the fan speed based on the detected initial temperature according to the detected temperature of the device, so that the device temperature is less than or equal to the target value, The fan speed at this time is the first speed;
  • the initial speed setting module 4011 includes a first initial speed setting sub-module or a second initial speed setting sub-module, and the first initial speed setting sub-module is used to set the initial speed of the fan to one a fixed value;
  • the second initial speed setting sub-module is configured to determine, according to the current ambient temperature and the first correspondence relationship, a fan speed required for the fan to reach a target value when the air filter is cleaned, and setting the fan speed to be an initial fan Rotating speed.
  • the system may further include a first severe jam threshold setting module 406.
  • the first severe jam threshold setting module 406 is configured to set the same first severe jam threshold for different ambient temperatures.
  • the clogging degree determining module 404 includes a first determining module 4041 configured to determine whether the rotational speed change amplitude is greater than or equal to the first severe occlusion threshold, and if so, determine that the air filter is severely blocked.
  • the system may further include a second severe jam threshold setting module 407 configured to set a second severe jam threshold corresponding to different ambient temperatures, and obtain an ambient temperature and a second severe jam.
  • the clogging degree determining module 404 includes a second determining module 4042, configured to determine a second severe clogging threshold according to the current ambient temperature and the second correspondence, and determine whether the rotational speed change amplitude is greater than or equal to the determined The second severe clogging threshold, if yes, determines that the air filter is severely blocked.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the system includes: an ambient temperature detecting module 801, a device temperature detecting module 802, a fan speed detecting module 803, a processing module 804, and a storage module 805.
  • the module 801 is configured to detect the current ambient temperature;
  • the device temperature detecting module 802 is configured to detect the device temperature;
  • the fan speed detecting module 803 is configured to detect the rotating speed of the fan; and when the device temperature detecting module 802 detects that the temperature of the device reaches the target value, the notification processing is performed.
  • the processing module is configured to obtain the speed of the fan at this time from the fan speed detecting module, and set the speed to be the first speed;
  • the storage module 805 is configured to store the relationship between the second speed and the ambient temperature, and the second speed is dustproof When the net is at a certain degree of clogging, the fan makes the device temperature reach the required speed;
  • the processing module 804 is further configured to acquire the current ambient temperature from the ambient temperature detecting module, and obtain a fan corresponding to the current ambient temperature from the storage module 805.
  • the processing module 804 is further configured to determine the first rotational speed relative to the second rotational speed The difference is obtained by the magnitude of the change in the rotational speed, and the degree of current clogging of the air filter is determined according to the magnitude of the change in the rotational speed.
  • the storage module 805 is further configured to store a first severe congestion threshold and/or a second severe congestion threshold; the first severe congestion threshold is the same threshold set for different ambient temperatures; the processing module 804 is further configured to Obtaining a first severe jam threshold from the storage module 805, and determining whether the speed change amplitude is greater than or equal to the first severe jam threshold. If yes, determining that the air filter is severely blocked; and the second severe jam threshold is corresponding to different ambient temperatures.
  • the processing module 804 is further configured to: after acquiring the current ambient temperature, acquire a second severe congestion threshold corresponding to the current ambient temperature from the storage module 805, and determine whether the rotational speed change amplitude is greater than or equal to the determined second severe congestion threshold, and if so, Then it is determined that the air filter is severely blocked.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the method provided by the embodiment of the invention is simple, low in cost and wide in scope of application.

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Abstract

一种防尘网堵塞检测方法、系统及装置，该方法包括：检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速；确定第一转速相对于第二转速的差值，根据所述差值得到转速变化幅度；根据转速变化幅度确定防尘网当前堵塞的程度。

Description

一种防尘网堵塞检测方法、系统及装置 技术领域
本发明涉及通讯设备散热技术领域，特别涉及一种防尘网堵塞检测方法、系统及装置。
背景技术
目前电子设备在运行的过程中会发热，使设备的温度升高。设备温度过高会影响设备的性能，因此电子设备大多都会设置散热系统，常用的散热系统为风冷散热系统。风冷散热实际上就是强制对流换热。风机不断向设备吹入冷空气，因为设备中存在热空气，所以就会产生温差，而温差的存在会使热从高温处传递到低温处，从而设备中的热空气便会流出来了，从而让设备的温度降下来。采用风冷散热必不可少引入灰尘，灰尘对设备的工作会产生一定的影响，而且还可能腐蚀设备。为了减少灰尘对设备的影响和腐蚀，一般都会在风机和设备之间安装防尘网来进行防尘，特别是对可靠性要求很高的通讯系统设备。防尘网积灰会影响设备散热性能，从而会影响设备的可靠性。
现有通讯设备均要求对防尘网进行定期的检测和维护，确保设备正常运行，这需要投入较大的人力成本。考虑到设备运行环境的多样性，防尘网堵塞程度也不尽相同，定期维护也不能保证防尘网永远保持正常状态，因此需要提供一种防尘网堵塞检测方法，以便在防尘网堵塞时及时告警，提醒用户进行维护工作。
相关技术中主要通过以下方式对防尘网堵塞情况进行检测：采集风机的转速、以及转速下的风速参数，根据风机的转速、以及转速下的风速参数获得风阻特征参数；根据风阻特征参数和告警阈值确定防尘网的堵塞程度，进而产生防尘网告警，提醒用户进行维护工作。然而这种方法只适用于固定风机转速散热系统，对于风机调速散热系统并不适用，因为对于风机调速散热系统而言，风机会根据设备的温度对转速进行调整，因此风机的转速是变化的，风阻特征参数随着风机转速变化而变化，无法有效识别防尘网堵塞从而 产生误告警，适用范围受限。针对上述方法不适用与风机调速散热系统的情况，本领域技术人员又提出了利用激光对防尘网进行检测，激光通过防尘网时会发生衰减，并且激光衰减程度受防尘网上的灰尘厚度影响，因此可以根据检测通过防尘网的激光透设光强来判断防尘网堵塞状态，进而产生防尘网告警，提醒用户进行维护工作。然而利用激光透射检测技术需要新增加激光发射及检测硬件装置，提高系统复杂性，即占用系统空间又增加成本，适用范围大大受限。因此，相关技术中还没有一种简单、成本又低的适用于风机调速散热系统的防尘网堵塞检测方法。
发明内容
本发明实施例提供一种防尘网堵塞检测方法、系统和装置，能解决相关技术中适用于风机调速散热系统的防尘网堵塞检测方法较复杂、成本高、适用范围小的问题。
为解决上述技术问题，本发明实施例提供了一种防尘网堵塞检测方法，包括：检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速；确定第一转速相对于第二转速的差值，根据差值得到转速变化幅度；根据转速变化幅度确定防尘网当前堵塞的程度。
可选地，检测在当前环境温度下，风机使设备温度达到目标值时的第一转速之前还包括：检测在不同环境温度下，防尘网在特定的堵塞程度时，为使设备温度达到目标值所需的风机转速，得到环境温度和风机转速之间的第一对应关系；
确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速包括：根据当前环境温度和第一对应关系确定防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的风机转速，设定该风机转速为第二转速。
可选地，特定的堵塞程度为防尘网从清洁到完全堵塞，且包含清洁和完全堵塞中的任一程度。
可选地，检测在当前环境温度下，风机使设备温度达到目标值时的第一转速包括：
为风机设置一个初始转速，根据检测到的设备的温度，在初始转速的基础上逐渐调整风机转速，直到设备温度小于等于目标值，设定此时的风机转速为第一转速。
可选地，初始转速的设置方式包括：将风机的初始转速设置为一个固定值；或根据当前环境温度和第一对应关系确定在防尘网清洁时风机使设备温度达到目标值所需的风机转速，设定该风机转速为风机的初始转速。
可选地，在根据转速变化幅度确定防尘网堵塞的程度之前，还包括：对于不同环境温度，设置同样的第一严重堵塞阈值；
根据转速变化幅度确定防尘网堵塞的程度包括：判断转速变化幅度是否大于或等于第一严重堵塞阈值，如是，则判定防尘网堵塞严重。
可选地，在根据转速变化幅度确定防尘网堵塞的程度之前，还包括：对于不同的环境温度对应设置第二严重堵塞阈值，并得到环境温度和第二严重堵塞阈值之间的第二对应关系；
根据转速变化幅度确定防尘网堵塞的程度包括：根据当前环境温度和第二对应关系确定第二严重堵塞阈值，判断转速变化幅度是否大于或等于确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
可选地，在检测在当前环境温度下，风机使设备温度达到目标值时的第一转速之前还包括：在当前环境温度下，定时检测风机的实际转速；
在确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速之后还包括：确定风机的实际转速相对于第二转速的差值，得到实际转速变化幅度；判断实际转速变化幅度是否大于或等于当前环境温度对应的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
本发明实施例还提供了一种防尘网堵塞检测系统，包括：第一转速确定模块、第二转速确定模块、转速变化幅度确定模块和堵塞程度确定模块；
第一转速确定模块设置为检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；
第二转速确定模块设置为确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速；
转速变化幅度确定模块设置为确定第一转速相对于第二转速的差值，根据差值得到转速变化幅度；
堵塞程度确定模块用于根据转速变化幅度确定防尘网当前堵塞的程度。
可选地，系统还包括第一对应关系确定模块，用于检测在不同环境温度下，防尘网在特定的堵塞程度时，为使设备温度达到目标值所需的风机转速，得到环境温度和风机转速之间的第一对应关系；
第二转速确定模块包括第二转速确定子模块，用于根据当前环境温度和第一对应关系确定防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的风机转速，设定该风机转速为第二转速。
可选地，第一转速确定模块包括初始速度设置子模块和调速子模块；
初始速度设置子模块用于为风机设置一个初始转速；
调速子模块用于根据检测到的设备的温度，在初始转速的基础上逐渐调整风机转速，直到设备温度小于等于目标值，设定此时的风机转速为第一转速。
可选地，初始速度设置模块包括第一初始速度设置子模块或第二初始速度设置子模块，第一初始速度设置子模块设置为将风机的初始转速设置为一个固定值；第二初始速度设置子模块设置为根据当前环境温度和第一对应关系确定在防尘网清洁时风机使设备温度达到目标值所需的风机转速，设定该风机转速为风机的初始转速。
可选地，系统还包括第一严重堵塞阈值设定模块，设置为对于不同环境温度，设置同样的第一严重堵塞阈值；
堵塞程度确定模块包括第一判定模块，设置为判断转速变化幅度是否大于或等于第一严重堵塞阈值，如是，则判定防尘网堵塞严重。
可选地，系统还包括第二严重堵塞阈值设定模块，用于对于不同的环境温度对应设置第二严重堵塞阈值，并得到环境温度和第二严重堵塞阈值之间的第二对应关系；
堵塞程度确定模块包括第二判定模块，用于根据当前环境温度和第二对应关系确定第二严重堵塞阈值，判断转速变化幅度是否大于或等于确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
本发明实施例还提供了一种防尘网堵塞检测装置，包括：环境温度检测模块、设备温度检测模块、风机转速检测模块、处理模块和存储模块；环境温度检测模块设置为检测当前环境温度；设备温度检测模块设置为检测设备温度；风机转速检测模块设置为检测风机的转速；当设备温度检测模块检测到设备的温度达到目标值时，通知处理模块，处理模块设置为从风机转速检测模块获取风机在此时的转速，设定该转速为第一转速；存储模块设置为存储第二转速与环境温度的关系，第二转速为防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的转速；处理模块还设置为从环境温度检测模块获取当前环境温度，并从存储模块获取与当前环境温度下对应的风机的第二转速；处理模块还设置为确定第一转速相对于第二转速的差值，得到转速变化幅度，并根据转速变化幅度确定防尘网当前堵塞的程度。
可选地，存储模块还设置为存储第一严重堵塞阈值和/或第二严重堵塞阈值；第一严重堵塞阈值为对于不同环境温度，设置的同样的阈值；处理模块还设置为从存储模块获取第一严重堵塞阈值，并判断转速变化幅度是否大于或等于第一严重堵塞阈值，如是，则判定防尘网堵塞严重；第二严重堵塞阈值为对于不同的环境温度对应设置的阈值；处理模块还设置为在获取当前环境温度之后，从存储模块获取与当前环境温度对应的第二严重堵塞阈值，判断转速变化幅度是否大于或等于确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
本发明实施例提供的防尘网堵塞检测方法及系统可解决相关技术中适用于风机调速散热系统的防尘网堵塞检测方法较复杂、成本高、适用范围小的问题。本发明实施例提出的方法主要通过限定在相同环境温度、相同设备温度目标值的情况下，对比风机在实际情况下调整的风机转速与风机在防尘网在特定的堵塞程度的情况下的风机转速来确定防尘网的堵塞情况。本发明实施例提出的方法仅需要对风机的第一转速进行测量，计算第一转速相对于第 二转速的差值就可以判断防尘网的堵塞情况，并不需要大的昂贵的设备。因此，本发明实施例提供的方法简单、成本低，而且适用范围广。
附图概述
图1为本发明实施例一提供的一种防尘网堵塞检测方法流程示意图；
图2为本发明实施例二提供的一种防尘网堵塞检测方法流程示意图；
图3为本发明实施例三提供的一种防尘网堵塞检测方法流程示意图；
图4为本发明实施例四提供的一种防尘网堵塞检测系统结构示意图；
图5为本发明实施例四提供的另一种防尘网堵塞检测系统结构示意图；
图6为本发明实施例四提供的另一种防尘网堵塞检测系统结构示意图；
图7为本发明实施例四提供的另一种防尘网堵塞检测系统结构示意图；
图8为本发明实施例五提供的一种防尘网堵塞检测装置结构示意图。
本发明的较佳实施方式
下面结合附图对本发明实施例作详细说明，在不冲突的情况下，本发明实施例和实施例中的特征可以相互任意组合。
实施例一：
本实施例提供了一种防尘网堵塞检测方法，请参考图1，包括：
步骤S101：确定在当前环境温度下，风机使设备温度达到目标值时的第一转速。
在本实施例中，目标值是指设备温度的目标值，也即想要设备达到的目标温度或目标温度范围，例如设备的当前温度是60度，这时开启风冷散热系统，想要使设备的温度达到20度，则设备温度的目标值就是20度。如果想要设备的温度达到20-30度这个范围内就可以，那么设备温度的目标值就是20-30度。本实施例是针对同一个设备而言，而相关技术中，因同一设备的目标值都相同，所以在本实施例主要以同一设备的目标值相同进行说明。对于目标值可调的设备，同样适用于本实施例。
在本实施例中，风机使设备温度达到目标值时的第一转速是指在实际应用中，通过风冷散热系统对设备进行降温，当设备的温度从高于目标值到首次降低到低于或等于目标值时，风机的转速。
步骤S102：确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速。
特定的堵塞程度为防尘网从清洁到完全堵塞中，且包含清洁和完全堵塞的任一程度。因此，防尘网的特定堵塞程度可以是防尘网清洁、轻微堵塞、严重堵塞、完全堵塞等情况。当确定的第二转速为在当前环境温度下，防尘网严重堵塞时风机使设备温度达到目标值所需的转速时，如果风机的第一转速低于第二转速，说明防尘网堵塞的程度低于严重堵塞。
步骤S103：确定所述第一转速与第二转速的差值，根据差值得到转速变化幅度。
在本实施例中，第二转速的确定可采用事先通过实验测定，例如，检测在各环境温度下，防尘网在特定的堵塞程度时，为使设备的温度达到目标值所需的风机转速，得到环境温度和风机转速之间的第一对应关系；根据当前环境温度和第一对应关系确定为使设备的温度达到目标值所需的风机转速，设定该风机转速为防尘网清洁时的第二转速。
第一对应关系的表现形式有多种，例如可采用表格的形式表现，请参见表1，表1中的数据是在设备温度目标值是20度下测得的：
表1
环境温度(度) 风机转速(r/s)
23 10
26 12
30 14
为使表格中的内容更全面，还可以检测不同环境温度下，风机为使设备温度达到不同的目标值所需的转速，得到环境温度、设备温度目标值和风机转速的对应关系，如下表：
表2
Figure PCTCN2014087145-appb-000001
在本实施例中，环境温度和为使设备温度达到目标值所需的风机转速的对应关系是根据实验测得的，或者由设备的参数推理或人为设定得到。如果是通过实验进行检测，以防尘网是清洁为例，可采用以下方式确定对应关系：将防尘网清洁干净，将设备置于一个可以调节温度的空间内，建立一张表格，表格内容包括环境温度和使设备温度达到目标值所需的风机转速(一般对于同一台设备，其设备温度目标值是固定的，所以这里以设备温度目标值为定值为例)。环境温度取值从23度到55度，设备温度的目标值设置为20度。将环境温度置于某一值，检测使设备温度达到目标值的风机转速，并填入表格内。从环境温度为23度开始到环境温度为55度，每隔一度检测一次使设备温度达到目标值的风机转速。
因为第一对应关系中包含了环境温度、设备温度目标值和为使设备温度达到目标值所需的风机转速的对应关系，因此在确定了当前环境温度和设备温度的目标值之后，就可以根据对应关系确定风机的转速，可以将该转速设置为风机的初始转速，如果防尘网是清洁的，则风机采用这个初始转速就可以使设备的温度达到设备温度目标值。如果防尘网存在堵塞，则会影响散热效果，风机采用初始转速向设备吹冷风就不能使设备的温度低于或等于目标值，风机会根据检测到的设备温度和目标值对风机的转速进行调整，以使其吹到设备上的风能使设备温度低于或等于目标值。
步骤S104：根据转速变化幅度确定防尘网堵塞的程度。
堵塞程度的判断方式与防尘网特定的堵塞程度的设置有关。例如当特定的堵塞程度设置为轻微堵塞时，只需要判断第一转速相对于第二转速的差值是否小于零，就可以判断防尘网的堵塞情况。当第一转速相对于第二转速的 差值小于零时，说明第一转速比第二转速小，说明防尘网堵塞的程度低于轻微堵塞，这时并不需要清洁。这样的判断方式非常简单，但是对于大于零的情况就不易直接确定堵塞程度。当特定的堵塞程度设置为严重堵塞时，只需要判断第一转速相对于第二转速的差值是否大于零，就可以判断防尘网的堵塞情况。当第一转速相对于第二转速的差值大于零时，说明第一转速比第二转速大，说明防尘网堵塞的程度比严重堵塞还严重，这时就需要对防尘网进行清洁处理。这样的判断方式对于小于零的情况就不易直接确定堵塞程度。
为了更准确地确定堵塞程度，还可以设置堵塞阈值，通过比较第一转速相对于第二转速的差值(也即转速变化幅度)与堵塞阈值之间的关系来判断防尘网的堵塞程度。对于不同环境温度，堵塞阈值可以设置得都相同；也可以对应不同环境温度设置相应的堵塞阈值。对于堵塞阈值都相同的这种情况，在本实施例中，用第一堵塞阈值表示。根据转速变化幅度确定堵塞程度的方式为：判断第一转速与第二转速的转速变化幅度是否大于或等于第一堵塞阈值，如是，则判定防尘网堵塞严重。堵塞阈值可根据需要告警时防尘网的堵塞程度进行设置，因此，堵塞阈值又分为严重堵塞阈值、轻微堵塞阈值等。堵塞阈值的具体值的设定也需要根据防尘网的特定堵塞程度进行设定。当设置的特定堵塞程度为清洁或轻微堵塞时，就需要将严重堵塞阈值设置得比较大，而轻微堵塞阈值就可以设置小一些。而对于设置的特定堵塞程度为严重堵塞时，严重堵塞阈值就不需要设置得那么大，甚至为0都可以。堵塞阈值可通过实验确定，例如，在某一温度下，检测风机在防尘网清洁的情况下使设备温度达到目标值所需的第三转速，和风机在防尘网堵塞需要清理的情况下使设备温度达到目标值所需的第四转速，将第四转速与第三转速的差值设置为堵塞阈值。其中，用户认为何时需要对防尘网进行清洁了，就可以将此时风机使设备温度达到目标值所需的速度设置为第四速度。
对于对应不同环境温度设置相应的堵塞阈值这种情况，在本实施例中用第二堵塞阈值表示。在对于不同的环境温度对应设置第二堵塞阈值后，可得到环境温度和第二堵塞阈值之间的第二对应关系。例如下表所示：
表3
Figure PCTCN2014087145-appb-000002
从上表可见，在一组对应关系中，不同环境温度对应的第二堵塞阈值可以相同，也可以不同，这可以根据实际情况进行设置。在后续的判断中，需要根据当前环境温度和第二对应关系确定第二堵塞阈值，判断第一转速与第二转速的转速变化幅度是否大于或等于确定的第二堵塞阈值，如是，则判定防尘网堵塞严重。因为第二对应关系中不同设备温度目标值可能对应不同的第二堵塞阈值，所以在获得了转速变化幅度之后，需要根据当前环境温度和建立的第二对应关系确定第二堵塞阈值，然后再将转速变化幅度与第二堵塞阈值进行对比，确定是否需要对防尘网进行清洁。
在上述步骤S101中，可为风机设置一个初始转速，根据检测到的设备的温度，在初始转速的基础上逐渐调整风机转速，使得设备温度小于等于目标值，设定此时的风机转速为第一转速；初始转速的设置方式包括：将风机的初始转速设置为一个固定值，这个固定值可以为0；或根据当前环境温度和上述第一对应关系，选择第二转速作为初始转速。较优的，可根据当前环境温度和第一对应关系确定在防尘网清洁时风机使设备温度达到目标值所需的风机转速，设定该风机转速为风机的初始转速。设置好初始转速之后，根据检测到的设备的温度，在初始转速的基础上逐渐调整风机转速，使得设备温度小于等于目标值，设定此时的风机转速为第一转速。具体的调整方式可以为：判断设备的温度是否低于或等于目标值，如否，则从初始转速开始，逐级增大风机的转速，直到检测到的设备的温度低于或等于目标值，当设备的温度首次低于或等于目标值时，风机的转速为风机的第一转速。由此可见，将风机的初始转速设置为当前环境温度下，在防尘网清洁时风机使设备温度 达到目标值所需的风机转速的有益效果是：减少风机的检测设备温度的频率。
当确定的第二转速为在当前环境温度下，防尘网清洁时风机使设备温度达到目标值所需的转速时，如果防尘网是清洁的，风机将转速调整到第二转速就可以使设备温度达到目标值。如果防尘网上堆积了灰尘，会影响风机对设备的散热效果，如果风机采用第二转速对设备进行散热，并不能使设备温度达到目标值，这时风机就会增大转速，使设备的温度低于或等于目标值，调整后的风机转速就是第一转速。风机调速策略依据设备内某温度敏感点调速。以下以一个例子对风机调速进行说明：风机定时检测设备温度，判断设备的温度是否低于或等于目标值(如果目标值是一个范围，则判断设备的温度是否在在这个目标值范围内)，若否，则增大转速；然后再检测设备温度，如果设备的温度还是大于设备温度目标值，则再增大转速，如此循环，直到设备的温度低于或等于目标值，此时的风机的转速就是风机的第一转速。
为能够及时地发现防尘网的堵塞情况，还可以在当前环境温度下，定时检测风机的实际转速；并确定风机的实际转速相对于第二转速的差值，得到实际转速变化幅度；判断实际转速变化幅度是否大于或等于当前环境下对应的第二严重堵塞阈值，如是，则告警。这种方式通过在风机调速的过程中对风机的转速进行监测，当风机的实际转速相对于第二转速变化的幅度大于或等于确定的第二严重堵塞阈值时，就预示着防尘网堵塞严重，需要进行清洗，因此可以及时告知用户，让用户及时对防尘网进行的清洗。
在本实施例中，风机转速可用风机转速档位表示，也可能风机控制字表示，只要该特征量能表征风机转速即可。当风机转速用档位表示时，所述风机的第一转速相对于所述第二转速变化的幅度为：风机的第一转速对应的档位与第二转速对应的档位的差值与风机的档位总数的商；所述堵塞阈值为一个数值。采用档位表示风机的转速的好处是：在检测风机的转速时，不需要专门的设备对其转速进行检测，只需要获知风机的档位即可，使检测方法更容易。对于风机转速用风机档位表示这种方案，在下面的实施例三中有示例性的说明，请参考实施例三。
本实施例中的环境温度并非特指设备所处环境温度，也指可以表征环境温度的温度，例如所在环境中某些物体的温度，这些物体的温度随环境温度 变化而变化，而不随设备风机转速变化而变化的。例如风机的温度，设备进风口处检测温度，也可是设备单板上某点检测温度，也可以设备风机控制板上某点检测温度。
实施例二：
本实施例提供了一种防尘网检测方法，该检测方法以防尘网的特定的堵塞程度为防尘网清洁为例。请参见图2，包括如下步骤：
步骤S201：在防尘网清洁的情况下，确定环境温度、设备温度目标值和为使设备温度达到目标值所需的风机转速的对应关系；并设置一个严重堵塞阈值。
步骤S202：检测当前环境温度，确定设备温度的目标值，根据对应关系，确定风机的第二转速。
步骤S203：将风机的第二转速设置为初始转速，风机从初始转速开始，根据设备的温度及设备温度的目标值调整风机转速；定时检测风机转速，当设备温度小于或等于目标值时，设定此时的风机转速为风机的第一转速。
步骤S204：判断风机的第一转速相对于第二转速的差值是否大于等于严重堵塞阈值，如是，则判断防尘网的堵塞严重，已经到了需要清洁的程度，发出清洁防尘网的警报。
实施例三：
本实施例提供了一种防尘网堵塞检测方法，在该方法中，以防尘网的特定堵塞程度为清洁为例，风机的转速用档位表示，请参见图3，包括如下内容：
步骤S301：设计实验，获得在防尘网清洁的情况下，环境温度、设备温度目标值、为使设备温度达到目标值所需的风机转速之间的对应关系；将设备温度的目标值都设置为20℃，环境温度设置33个值，从23℃到55℃，风机转速用档位表示，当环境温度为23℃时，将使设备温度达到20℃的风速设置为最低档1档，环境温度为55℃时，将使设备温度达到20℃的风速设置为 最高档33档，环境温度处于24℃—54℃之间时，风扇转速档位从2档—32档分别与之一一对应，对应关系总数为33个。虽然环境温度与风机转速档位存在一一对应关系，但风机调速策略并不依据环境温度调速，而依据设备内某温度敏感点调速；
步骤S302：设定堵塞阈值为16/33；
步骤S303：检测当前环境温度为33℃(如果环境温度介于设定上下临近温度之间时，环境温度取临近温度下限值即温度低值，比如环境温度为23.6℃，位于23℃-24℃之间，按环境温度23℃处理)。设定设备温度目标值为20℃，根据上述对应关系，将风机的初始速度设置为11档；
步骤S304：检测设备敏感点温度是否达到目标值，如否，则执行步骤S305，如是，则执行步骤S306；
步骤S305：上调风机转速档位1档，然后执行步骤S304；
步骤S306：判断风机当前的转速的档位与风机的初始速度的档位的差值与总档位的商是否大于堵塞阈值，若是，则执行步骤S307，若否，则不处理；
步骤S307：发出警报。
本实施例中，环境温度在23℃—39℃范围内，风机当前的转速的档位与风机的初始速度的档位的差值最大可以为16个，即可以进行有效防尘网堵塞告警。
本实施例中，堵塞阈值设定为16/32，这个值可根据实际使用需要调整，建议不小于16/32，不大于24/32，如希望更早预知防尘网堵塞，为防尘网维护预留足够时间，则这个设置值可适当小些，如希望防尘网维护时间更长，可以保证及时维护防尘网，则这个设置值可适当大些。
此外，对于环境温度较大的，可设置其堵塞阈值小一些，比如环境温度45℃，对应的设计档位为23档，如果变化16档才上报防尘网堵塞则有问题，因为总共才32档，这时阈值可能设置成1/4。
实施例四：
本实施例提供了一种防尘网堵塞检测系统，请参见图4，包括：第一转 速确定模401、第二转速确定模块402、转速变化幅度确定模块403和堵塞程度确定模块404；第一转速确定模块401设置为检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；第二转速确定模块402设置为确定在当前环境温度下，防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的第二转速；转速变化幅度确定模块403设置为确定第一转速相对于第二转速的差值，得到转速变化幅度；堵塞程度确定模块404设置为根据转速变化幅度确定防尘网当前堵塞的程度。
在本实施例中，系统还包括第一对应关系确定模块405，请参见图5，第一对应关系确定模块405，设置为检测在不同环境温度下，防尘网在特定的堵塞程度时，为使设备温度达到目标值所需的风机转速，得到环境温度和风机转速之间的第一对应关系；第二转速确定模块402包括第二转速确定子模块4021，设置为根据当前环境温度和第一对应关系确定防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的风机转速，设定该风机转速为第二转速。
在本实施例中，第一转速确定模块401还可包括初始速度设置子模块4011和调速子模块4012，请参见图6。初始速度设置子模块4011设置为为风机设置一个初始转速；调速子模块4012设置为根据检测到的设备的温度，在初始转速的基础上逐渐调整风机转速，使得设备温度小于等于目标值，设定此时的风机转速为第一转速；初始速度设置模块4011包括第一初始速度设置子模块或第二初始速度设置子模块，第一初始速度设置子模块用于将风机的初始转速设置为一个固定值；第二初始速度设置子模块设置为根据当前环境温度和第一对应关系确定在防尘网清洁时风机使设备温度达到目标值所需的风机转速，设定该风机转速为风机的初始转速。
在本实施例中，系统还可以包括第一严重堵塞阈值设定模块406，请参见图7，第一严重堵塞阈值设定模块406用于对于不同环境温度，设置同样的第一严重堵塞阈值；堵塞程度确定模块404包括第一判定模块4041，设置为判断转速变化幅度是否大于或等于第一严重堵塞阈值，如是，则判定防尘网堵塞严重。系统还可以包括第二严重堵塞阈值设定模块407，设置为对于不同的环境温度对应设置第二严重堵塞阈值，并得到环境温度和第二严重堵 塞阈值之间的第二对应关系；堵塞程度确定模块404包括第二判定模块4042，设置为根据当前环境温度和第二对应关系确定第二严重堵塞阈值，判断转速变化幅度是否大于或等于确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
实施例五：
本实施例提供了一种防尘网堵塞检测装置，请参见图8，包括：环境温度检测模801、设备温度检测模块802、风机转速检测模块803、处理模块804、存储模块805；环境温度检测模块801用于检测当前环境温度；设备温度检测模块802设置为检测设备温度；风机转速检测模块803用于检测风机的转速；当设备温度检测模块802检测到设备的温度达到目标值时，通知处理模块804，处理模块设置为从风机转速检测模块获取风机在此时的转速，设定该转速为第一转速；存储模块805设置为存储第二转速与环境温度的关系，第二转速为防尘网在特定的堵塞程度时，风机使设备温度达到目标值所需的转速；处理模块804还设置为从环境温度检测模块获取当前环境温度，并从存储模块805获取与当前环境温度下对应的风机的第二转速；处理模块804还设置为确定第一转速相对于第二转速的差值，得到转速变化幅度，并根据转速变化幅度确定防尘网当前堵塞的程度。
在本实施例中，存储模块805还设置为存储第一严重堵塞阈值和/或第二严重堵塞阈值；第一严重堵塞阈值为对于不同环境温度，设置的同样的阈值；处理模块804还设置为从存储模块805获取第一严重堵塞阈值，并判断转速变化幅度是否大于或等于第一严重堵塞阈值，如是，则判定防尘网堵塞严重；第二严重堵塞阈值为对于不同的环境温度对应设置的阈值；处理模块804还设置为在获取当前环境温度之后，从存储模块805获取与当前环境温度对应的第二严重堵塞阈值，判断转速变化幅度是否大于或等于确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通 技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
上述实施例中的各装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的各装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
工业实用性
本发明实施例提供的方法简单、成本低，而且适用范围广。

Claims (16)

  1. 一种防尘网堵塞检测方法，包括：
    检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；
    确定在所述当前环境温度下，防尘网在特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的第二转速；
    确定所述第一转速相对于所述第二转速的差值，根据所述差值得到转速变化幅度；
    根据所述转速变化幅度确定所述防尘网当前堵塞的程度。
  2. 如权利要求1所述的防尘网堵塞检测方法，其中，所述检测在当前环境温度下，风机使设备温度达到目标值时的第一转速之前还包括：检测在不同环境温度下，所述防尘网在特定的堵塞程度时，为使所述设备温度达到所述目标值所需的风机转速，得到所述环境温度和所述风机转速之间的第一对应关系；
    所述确定在当前环境温度下，防尘网在特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的第二转速包括：根据所述当前环境温度和所述第一对应关系确定所述防尘网在所述特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的风机转速，设定该风机转速为第二转速。
  3. 如权利要求1或2所述的防尘网堵塞检测方法，其中，所述特定的堵塞程度为防尘网从清洁到完全堵塞，且包含清洁和完全堵塞中的任一程度。
  4. 如权利要求2所述的防尘网堵塞检测方法，其中，所述检测在当前环境温度下，风机使设备温度达到目标值时的第一转速包括：
    为所述风机设置一个初始转速，根据检测到的设备的温度，在所述初始转速的基础上逐渐调整风机转速，直到所述设备温度小于等于所述目标值，设定此时的风机转速为第一转速。
  5. 如权利要求4所述的防尘网堵塞检测方法，其中，
    所述为所述风机设置一个初始转速包括：将所述风机的初始转速设置为一个固定值；或根据所述当前环境温度和所述第一对应关系确定在防尘网清 洁时风机使设备温度达到所述目标值所需的风机转速，设定该风机转速为风机的初始转速。
  6. 如权利要求3所述的防尘网堵塞检测方法，其中，在所述根据所述转速变化幅度确定防尘网堵塞的程度之前，还包括：对于不同环境温度，设置同样的第一严重堵塞阈值；
    所述根据所述转速变化幅度确定所述防尘网堵塞的程度包括：判断所述转速变化幅度是否大于或等于所述第一严重堵塞阈值，如是，则判定所述防尘网堵塞严重。
  7. 如权利要求3所述的防尘网堵塞检测方法，其中，在所述根据所述转速变化幅度确定所述防尘网堵塞的程度之前，还包括：对于不同的环境温度对应设置第二严重堵塞阈值，并得到所述环境温度和所述第二严重堵塞阈值之间的第二对应关系；
    所述根据所述转速变化幅度确定防尘网堵塞的程度包括：根据所述当前环境温度和所述第二对应关系确定第二严重堵塞阈值，判断所述转速变化幅度是否大于或等于所述第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
  8. 如权利要求7所述的防尘网堵塞检测方法，其中，在所述检测在当前环境温度下，风机使设备温度达到目标值时的第一转速之前还包括：在所述当前环境温度下，定时检测所述风机的实际转速；
    在所述确定在当前环境温度下，所述防尘网在特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的第二转速之后还包括：确定所述风机的实际转速相对于所述第二转速的差值，根据所述差值得到实际转速变化幅度；判断所述实际转速变化幅度是否大于或等于当前环境温度对应的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
  9. 一种防尘网堵塞检测系统，包括：第一转速确定模块、第二转速确定模块、转速变化幅度确定模块和堵塞程度确定模块；
    所述第一转速确定模块设置为检测在当前环境温度下，风机使设备温度达到目标值时的第一转速；
    所述第二转速确定模块设置为确定在所述当前环境温度下，所述防尘网 在特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的第二转速；
    所述转速变化幅度确定模块设置为确定所述第一转速相对于所述第二转速的差值，根据所述差值得到转速变化幅度；以及
    所述堵塞程度确定模块设置为根据所述转速变化幅度确定防尘网当前堵塞的程度。
  10. 如权利要求9所述的防尘网堵塞检测系统，其中，所述系统还包括第一对应关系确定模块，设置为检测在不同环境温度下，所述防尘网在特定的堵塞程度时，为使所述设备温度达到所述目标值所需的风机转速，得到所述环境温度和所述风机转速之间的第一对应关系；
    所述第二转速确定模块包括第二转速确定子模块，设置为根据所述当前环境温度和所述第一对应关系确定所述防尘网在所述特定的堵塞程度时，所述风机使所述设备温度达到所述目标值所需的风机转速，设定该风机转速为第二转速。
  11. 如权利要求10所述的防尘网堵塞检测系统，其中，所述第一转速确定模块包括初始速度设置子模块和调速子模块；
    所述初始速度设置子模块设置为为所述风机设置一个初始转速；
    所述调速子模块设置为根据检测到的设备的温度，在所述初始转速的基础上逐渐调整风机转速，直到所述设备温度小于等于所述目标值，设定此时的风机转速为第一转速。
  12. 如权利要求11所述的防尘网堵塞检测系统，其中，
    所述初始速度设置模块包括第一初始速度设置子模块或第二初始速度设置子模块，第一初始速度设置子模块设置为将所述风机的初始转速设置为一个固定值；第二初始速度设置子模块设置为根据所述当前环境温度和所述第一对应关系确定在所述防尘网清洁时所述风机使所述设备温度达到所述目标值所需的风机转速，设定该风机转速为所述风机的初始转速。
  13. 如权利要求12所述的防尘网堵塞检测系统，所述系统还包括第一严重堵塞阈值设定模块，设置为对于不同环境温度，设置同样的第一严重堵塞 阈值；
    所述堵塞程度确定模块包括第一判定模块，设置为判断所述转速变化幅度是否大于或等于所述第一严重堵塞阈值，如是，则判定所述防尘网堵塞严重。
  14. 如权利要求12所述的防尘网堵塞检测系统，其中，所述系统还包括第二严重堵塞阈值设定模块，设置为对于不同的环境温度对应设置第二严重堵塞阈值，并得到环境温度和第二严重堵塞阈值之间的第二对应关系；
    所述堵塞程度确定模块包括第二判定模块，设置为根据当前环境温度和所述第二对应关系确定第二严重堵塞阈值，判断所述转速变化幅度是否大于或等于所述确定的第二严重堵塞阈值，如是，则判定所述防尘网堵塞严重。
  15. 一种防尘网堵塞检测装置，包括：环境温度检测模块、设备温度检测模块、风机转速检测模块、处理模块和存储模块；
    所述环境温度检测模块设置为检测当前环境温度；
    所述设备温度检测模块设置为检测设备温度；
    所述风机转速检测模块设置为检测风机的转速；
    所述设备温度检测模块还设置为当检测到设备的温度达到目标值时，通知所述处理模块，所述处理模块设置为从所述风机转速检测模块获取风机在此时的转速，设定该转速为第一转速；
    所述存储模块设置为存储第二转速与环境温度的关系，所述第二转速为防尘网在特定的堵塞程度时，风机使设备温度达到所述目标值所需的转速；所述处理模块还设置为从所述环境温度检测模块获取当前环境温度，并从所述存储模块获取与当前环境温度下对应的风机的第二转速；
    所述处理模块还设置为确定所述第一转速相对于所述第二转速的差值，根据所述差值得到转速变化幅度，并根据所述转速变化幅度确定防尘网当前堵塞的程度。
  16. 如权利要求15所述的防尘网堵塞检测装置，其中，所述存储模块还设置为存储第一严重堵塞阈值和/或第二严重堵塞阈值；
    所述第一严重堵塞阈值为对于不同环境温度，设置的同样的阈值；所述 处理模块还设置为从所述存储模块获取第一严重堵塞阈值，并判断所述转速变化幅度是否大于或等于所述第一严重堵塞阈值，如是，则判定防尘网堵塞严重；
    所述第二严重堵塞阈值为对于不同的环境温度对应设置的阈值；所述处理模块还设置为在获取当前环境温度之后，从所述存储模块获取与当前环境温度对应的第二严重堵塞阈值，判断所述转速变化幅度是否大于或等于所述确定的第二严重堵塞阈值，如是，则判定防尘网堵塞严重。
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