CN113418546A - Dust screen blockage detection device and method and electronic equipment - Google Patents
Dust screen blockage detection device and method and electronic equipment Download PDFInfo
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- CN113418546A CN113418546A CN202010138449.XA CN202010138449A CN113418546A CN 113418546 A CN113418546 A CN 113418546A CN 202010138449 A CN202010138449 A CN 202010138449A CN 113418546 A CN113418546 A CN 113418546A
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Abstract
The embodiment of the invention discloses a device and a method for detecting blockage of a dust screen and electronic equipment, wherein the device comprises a heating unit, a first temperature sensor, a second temperature sensor and a controller; the heating unit is arranged at the downstream of the dust screen air duct, and the heating power is constant; the first temperature sensor is arranged at the upstream of the dust screen air duct and used for acquiring an initial first temperature and a first temperature at the upstream of the dust screen air duct; the second temperature sensor is arranged in the dust screen air duct on the side, away from the dust screen, of the heating unit and is used for acquiring an initial second temperature and a second temperature at the downstream of the dust screen air duct; the controller is used for determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient, and determining that the dust screen is in a blockage warning state when the temperature difference value between the second temperature and the first temperature is larger than or equal to the blockage early warning value. When the electronic equipment is used for different altitudes, the device can accurately judge whether the dust screen is blocked or not, and the detection accuracy is improved.
Description
Technical Field
The embodiment of the invention relates to detection technologies, in particular to a device and a method for detecting blockage of a dust screen and electronic equipment.
Background
The heat dissipation of electronic equipment is mostly realized through air cooling heat dissipation, and the air cooling equipment generally has the problem of dust deposition. In order to reduce the influence of dust on electronic equipment, most air cooling equipment is provided with a dust screen. However, the dust-collecting state of the dust screen can directly influence the heat dissipation of the system.
In order to ensure the normal operation of the equipment, the dust deposition state of the dust screen needs to be monitored in real time so as to clean the dust screen in time when the dust screen is blocked. The general method for detecting the blockage of the dust screen comprises the steps of setting a fixed alarm threshold value for air cooling equipment, periodically detecting the temperature rise value of a specific element in the equipment (the difference value of the temperature of the specific element in the equipment and the temperature of an air inlet of the dust screen), comparing the temperature rise value with the preset alarm threshold value, and triggering the blockage alarm of the dust screen once the detected temperature rise value exceeds the alarm threshold value.
However, since the air density is different at different altitudes, according to the basic theory of thermodynamics, when the electronic device is applied to different altitudes, the temperature rise values of specific components in the device due to the blockage of the dust screen are different, that is, the threshold values for judging whether the dust screen is blocked are different. Therefore, when the electronic equipment is applied to different altitudes, the scheme of judging whether the dust screen is blocked by adopting the same alarm threshold value easily causes false alarm or no alarm, and the accuracy and the reliability of detection are reduced.
Disclosure of Invention
The embodiment of the invention provides a device and a method for detecting blockage of a dust screen and electronic equipment.
In a first aspect, an embodiment of the present invention provides a device for detecting blockage of a dust screen, where the device includes: the heating device comprises a heating unit, a first temperature sensor, a second temperature sensor and a controller;
the heating unit is arranged at the downstream of the dust screen air duct, and the heating power of the heating unit is constant;
the first temperature sensor is arranged at the upstream of the dust screen air duct and used for acquiring initial first temperature at the upstream of the dust screen air duct when the dust screen is in a brand new state and continuously acquiring first temperature at the upstream of the dust screen air duct when the dust screen is in a working state;
the second temperature sensor is arranged in the dust screen air duct on the side, away from the dust screen, of the heating unit and is used for acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state and continuously acquiring a second temperature at the downstream of the dust screen air duct when the dust screen is in a working state;
the first temperature sensor, the second temperature sensor and the heating unit are electrically connected with the controller; the controller is used for determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient, and determining that the dust screen is in a blockage warning state when the temperature difference value between the second temperature and the first temperature is larger than or equal to the blockage early warning value.
Optionally, when the dust screen is in a brand new state, the difference value between the temperatures acquired by the second temperature sensor and the first temperature sensor is an initial temperature difference value, and when the dust screen is in a blockage warning state, the difference value between the temperatures acquired by the second temperature sensor and the first temperature sensor is a warning temperature difference value; the preset coefficient is the ratio of the alarm temperature difference value to the initial temperature difference value at the same altitude, and is a fixed value irrelevant to the altitude.
Optionally, the dust screen blockage detection device further comprises an alarm device;
the alarm device is electrically connected with the controller, and the controller controls the alarm device to send out warning information after determining that the dust screen is in the blocking warning state.
Optionally, the alarm device comprises a buzzer and/or an indicator light.
Optionally, the dust screen blockage detection device further comprises a memory;
the memory is electrically connected with the controller and used for storing the blockage early warning value;
the heat generating unit includes a heat generating resistor.
In a second aspect, an embodiment of the present invention provides a method for detecting clogging of a dust screen, which is performed by using the apparatus for detecting clogging of a dust screen provided in any one of the above aspects, and the method includes:
acquiring an initial first temperature at the upstream of an air duct of the dust screen when the dust screen is in a brand new state;
acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state;
determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient;
continuously acquiring a first temperature at the upstream of the dust screen air duct and a second temperature at the downstream of the dust screen air duct;
and if the temperature difference between the second temperature and the first temperature is greater than or equal to the blockage early warning value, determining that the dust screen is in a blockage warning state.
Optionally, when the dust screen is in a brand new state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is an initial temperature difference value, and when the dust screen is in a blockage warning state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is a warning temperature difference value; the preset coefficient is the ratio of the alarm temperature difference value to the initial temperature difference value at the same altitude, and is a fixed value irrelevant to the altitude.
Optionally, after determining that the dust screen is in the blocking alarm state, the method for detecting blocking of the dust screen further includes:
and generating the dustproof net blockage warning information.
Optionally, after determining the blockage warning value according to the initial first temperature, the initial second temperature, and the preset coefficient, the method for detecting blockage of the dust screen further includes:
and storing the blockage early warning value.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes a dust screen and the dust screen blockage detection apparatus provided in any one of the above aspects.
According to the embodiment of the invention, the initial first temperature and the initial second temperature are respectively obtained through the first temperature sensor and the second temperature sensor so as to determine the temperature rise value of the heating unit when the dust screen is brand new at a certain altitude, and then the blockage early warning value at the altitude is obtained through calculation by combining the preset coefficient.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting clogging of a dust screen according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another dust screen blockage detection device provided by the embodiment of the invention;
fig. 3 is a schematic flow chart of a method for detecting clogging of a dust screen according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another method for detecting clogging of a dust screen according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Before describing embodiments of the present invention, a detailed explanation of the problems of the background art will be provided. It will be appreciated that the air density varies widely for different altitudes. From the basic theory of thermodynamics, that is, the heat generation amount is specific heat, mass, and temperature rise, the temperature rise of the air inside the electronic device is heat generation power consumption/(specific heat of air, air density, and air volume). Because different altitude's air density change greatly, consequently, when electronic equipment was in different altitude, the difference of the inside air temperature rise of electronic equipment under the dust screen jam alarm state was very big, if adopt same warning threshold value to judge whether the dust screen blocks up inaccurate, caused the mistake easily and reported an emergency or not report an emergency and ask for help or increased vigilance.
In order to solve the problem, the blocking early warning value is set to be dynamically adjusted along with the altitude so as to improve the accuracy and reliability of the blocking warning of the dust screen.
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a device for detecting clogging of a dust screen according to an embodiment of the present invention, and referring to fig. 1, the device 10 for detecting clogging of a dust screen includes: the heating device comprises a heating unit 11, a first temperature sensor 12, a second temperature sensor 13 and a controller 14, wherein the heating unit 11 is arranged at the downstream of a dustproof net air duct, and the heating power of the heating unit 11 is constant; the first temperature sensor 12 is arranged at the upstream of the dust screen air duct and is used for acquiring an initial first temperature at the upstream of the dust screen air duct when the dust screen 21 is in a brand new state and continuously acquiring a first temperature at the upstream of the dust screen air duct when the dust screen 21 is in a working state; the second temperature sensor 13 is arranged in the dust screen air duct on the side of the heating unit 11 away from the dust screen 21, and is used for acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen 21 is in a brand new state and continuously acquiring a second temperature at the downstream of the dust screen air duct when the dust screen 21 is in a working state; the first temperature sensor 12, the second temperature sensor 13 and the heating unit 11 are electrically connected with the controller 14, and the controller 14 is configured to determine a blockage warning value according to the initial first temperature, the initial second temperature and a preset coefficient, and determine that the dust screen 21 is in a blockage warning state when a temperature difference value between the second temperature and the first temperature is greater than or equal to the blockage warning value.
For example, the direction indicated by the arrow in fig. 1 indicates the air flow direction of the dust screen air duct, and the air flow direction is from the upstream of the dust screen air duct to the downstream of the dust screen air duct, where the air flow direction is sequentially provided with the first temperature sensor 12, the dust screen 21, the heating unit 11, and the second temperature sensor 13, where the dust screen 21 belongs to a part of the electronic device, and the dust screen blockage detection device 10 is used to monitor the dust deposition state of the dust screen 21 and determine whether it is blocked for warning.
The first temperature sensor 12 is configured to obtain a temperature at an upstream of the dust screen air duct, that is, an ambient temperature of the electronic device. The second temperature sensor 13 is used to acquire the temperature at the downstream of the dust screen duct, in other words, the second temperature sensor 13 is used to acquire the air temperature affected by the heat generated by the heat generating unit 11. When the difference value of the temperatures acquired by the second temperature sensor 13 and the first temperature sensor 12 is greater than or equal to the blockage warning value, it is determined that the dust screen 21 is in a blockage warning state.
Specifically, the state of the dust screen can be divided into a brand new state and a working state (in the working state, if the dust screen is seriously blocked, the state can be regarded as a blocking alarm state) according to the dust deposition state of the dust screen. Accordingly, the temperature acquired by the first temperature sensor 12 may be divided into an initial first temperature and a first temperature, and the temperature acquired by the second temperature sensor 13 may be divided into an initial second temperature and a second temperature. In the embodiment of the invention, the initial first temperature and the initial second temperature are used for determining the blockage early warning value, and the temperature difference value between the second temperature and the first temperature is used for being compared with the blockage early warning value so as to judge whether the dust screen is in a blockage warning state or not.
From the above, in order to improve the accuracy and reliability of the anti-dust-net blockage alarm, when the electronic device works at different altitudes, different blockage early warning values need to be used for judgment. In the embodiment of the invention, the blockage warning value is (initial second temperature-initial first temperature) or a preset coefficient, wherein the preset coefficient is a fixed value, and since the initial second temperature and the initial first temperature are measured under the altitude of the electronic equipment, and when the altitude of the electronic equipment is different, the temperature rise value of the heating unit is different when the dustproof net is in a brand new state (namely the difference value between the initial second temperature and the initial first temperature is different), the blockage warning value obtained according to the formula is also different, thereby improving the accuracy of blockage warning. The preset coefficient may be determined empirically by those skilled in the art, and the embodiment of the present invention is not limited thereto, and the method for determining the preset coefficient will be described in the following.
It can be understood that the heating power of the components in the electronic device is not stable and unchanged, and if the dust screen is not blocked for warning, but the heating power of the components is suddenly increased, the difference between the second temperature and the first temperature may be greater than the blocking warning value, which may cause erroneous judgment, so that in the embodiment of the present invention, the heating unit 11 with constant heating power is added in the dust screen blocking detection apparatus 10, and the second temperature sensor 12 is used to obtain the temperature affected by the heating of the heating unit 11, thereby further improving the accuracy of the detection result.
It should be noted that the position of the heating unit 11 should be as close to the dust screen 21 as possible, so that on one hand, the detection result of the second temperature sensor 13 is not affected by other components, and on the other hand, the heat generated by the heating unit 11 is not affected by the working state of the original devices in the electronic device.
According to the embodiment of the invention, the initial first temperature and the initial second temperature are respectively obtained through the first temperature sensor and the second temperature sensor so as to determine the temperature rise value of the heating unit when the dust screen is brand new at a certain altitude, and then the blockage early warning value at the altitude is obtained through calculation by combining the preset coefficient.
On the basis of the above embodiment, optionally, when the dust screen 21 is in a brand new state, the difference between the temperatures acquired by the second temperature sensor 13 and the first temperature sensor 12 is an initial temperature difference value, and when the dust screen 21 is in a blockage warning state, the difference between the temperatures acquired by the second temperature sensor 13 and the first temperature sensor 12 is a warning temperature difference value, wherein the preset coefficient is a ratio of the warning temperature difference value to the initial temperature difference value at the same altitude, and the preset coefficient is a fixed value unrelated to the altitude.
According to the conclusion, the preset coefficient can be obtained by testing the initial temperature difference value and the alarm temperature difference value in advance in the design stage of the electronic equipment. After the electronic device is put into different altitudes, the controller 14 can determine the blockage early warning value at any altitude according to the preset coefficient, the initial first temperature and the initial second temperature so as to improve the accuracy and reliability of the dustproof network blockage warning.
In the following, the explanation is mainly given for "the preset coefficient is a constant value independent of altitude":
when the electronic equipment works at the altitude HaWhen the dust screen is in a brand-new state, the temperature of the air in the equipment rises (delta T)a) Heat generation power consumption (P)a) /(air specific Heat (c)a) Air density (. rho.)a) Air volume (V)a) ); temperature rise (delta T) of air in equipment under the state of dust screen blockage alarma') heat generation power consumption (P)a')/(air specific heat (c)a') air density (ρa') air volume (V)a')). In the formula,. DELTA.TaI.e. initial temperature difference value, Δ Ta' that is, the temperature difference value is alarmed, and therefore, the altitude HaLower, a predetermined coefficient Fa＝ΔTa′/ΔTa＝(Pa′/Pa)·(ca/ca′)·(ρa/ρa′)·(Va/Va') since the specific heat and density of air at the same altitude are substantially constant, i.e. ca/ca′＝1，ρa/ρa' 1, in the present embodiment, the heating power of the heating element is not changed, i.e., Pa′/PaWhen 1, Fa＝Va/Va′。
In the same way, when the electronic equipment works at the altitude Hb(Hb≠Ha) While, a predetermined coefficient Fb＝Vb/Vb′。
Since the air volume of the air cooling equipment is basically only related to the dust deposition state of the dust screen and is not related to the change of the altitude, Va/Va′＝Vb/Vb'. It is thus obtained that the predetermined coefficient is a constant value independent of altitude.
Through the analysis, the embodiment of the invention also ensures that the ratio of the alarm temperature difference value to the initial temperature difference value under different altitudes is a certain value by additionally arranging the heating unit with constant heating power, so that the ratio can be used as a preset coefficient, and the reliability of the calculation formula of the blockage early warning value and the accuracy of the calculation result are further ensured.
Fig. 2 is a schematic structural diagram of another dust screen blockage detection device according to an embodiment of the present invention, and the structure of the dust screen blockage detection device 10 is further described on the basis of the above embodiment.
Referring to fig. 2, optionally, the dust screen blockage detection device 10 further includes an alarm device 15, the alarm device 15 is electrically connected to the controller 14, and the controller 14 controls the alarm device 15 to send out an alarm message after determining that the dust screen 21 is in the blockage warning state.
Optionally, the alarm device 15 comprises a buzzer and/or an indicator light.
When the controller 14 determines that the dust screen 21 is in the blocking alarm state, the controller can remind the worker to clear the dust deposit on the dust screen in time by controlling one or more modes such as the buzzer ringing and the indicator lamp flickering.
It should be noted that, in addition to the alarm device 15, the dust screen blockage detection device 10 may further include a wireless communication device, and when the controller 14 determines that the dust screen 21 is in the blockage warning state, the wireless communication device may send a warning signal to a remote worker.
Optionally, the device 10 for detecting clogging of a dust screen further includes a memory 16, and the memory 16 is electrically connected to the controller 14 and is used for storing the clogging warning value.
After the electronic device is turned on at a certain altitude, the controller 14 may obtain the initial first temperature and the initial second temperature, calculate the blockage warning value by combining the preset coefficient, and store the blockage warning value in the memory 16, so as to read or call the blockage warning value in the subsequent judgment.
Optionally, the heat generating unit 11 includes a heat generating resistor.
The heating resistor has low cost, low power consumption and good practicability, and the requirement of the embodiment of the invention on constant heating power can be met by taking the heating resistor as a heating unit. Those skilled in the art can select the device of the heat generating unit according to actual needs, which is not limited in the embodiment of the present invention.
Based on the same inventive concept, an embodiment of the present invention further provides a method for detecting clogging of a dust screen, which can be performed by using the apparatus for detecting clogging of a dust screen provided in any of the above embodiments, and has the same beneficial effects as the apparatus for detecting clogging of a dust screen, as shown in fig. 3, the method specifically includes the following steps:
and S31, acquiring an initial first temperature at the upstream of the dust screen air duct when the dust screen is in a brand new state.
And S32, acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state.
And S33, determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient.
And S34, continuously acquiring a first temperature at the upstream of the dustproof net air duct and a second temperature at the downstream of the dustproof net air duct.
And S35, if the temperature difference between the second temperature and the first temperature is greater than or equal to the blockage early warning value, determining that the dust screen is in a blockage warning state.
According to the method for detecting the blockage of the dust screen, provided by the embodiment of the invention, the blockage early warning value is determined firstly, and then whether the dust screen is in the blockage warning state or not is judged according to the blockage early warning value, so that the judgment result of the blockage warning is more accurate and reliable.
On the basis, optionally, when the dust screen is in a brand new state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is an initial temperature difference value, and when the dust screen is in a blockage warning state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is a warning temperature difference value; the preset coefficient is the ratio of the alarm temperature difference value to the initial temperature difference value at the same altitude, and is a fixed value irrelevant to the altitude.
According to the conclusion, the preset coefficient can be obtained in advance in the design stage of the electronic equipment, and details are not repeated here.
Fig. 4 is a schematic flow chart of another method for detecting clogging of a dust screen according to an embodiment of the present invention, which is further optimized, and referring to fig. 4, the method includes the following steps:
and S41, acquiring an initial first temperature at the upstream of the dust screen air duct when the dust screen is in a brand new state.
And S42, acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state.
And S43, determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient.
And S44, storing the blockage early warning value.
And the blockage early warning value is stored, so that the subsequent reading or calling of the blockage early warning value is facilitated.
And S45, acquiring a first temperature at the upstream of the dust screen air duct and a second temperature at the downstream of the dust screen air duct at preset intervals.
For example, the preset time may be 6h, and a person skilled in the art may set the duration of the preset time by himself, which is not limited in the embodiment of the present invention. The method of testing the temperature at intervals can reduce power consumption and reduce the operation burden of the controller.
And S46, judging whether the temperature difference between the second temperature and the first temperature is greater than or equal to the blockage early warning value, if so, executing S47, otherwise, executing S45.
And S47, determining that the dust screen is in a blockage warning state.
And S48, generating the dustproof net blockage warning information.
Illustratively, the jam warning information can be fed back to the staff in a mode of indicating lamp flashing, buzzer sounding or wireless signal transmission to remind the staff of timely cleaning dust deposition of the dust screen.
The embodiment of the present invention further provides an electronic device, which at least includes the dust-screen blockage detection device provided in the embodiment of the present invention, so that the electronic device has the same beneficial effects as the dust-screen blockage detection device provided in the embodiment of the present invention, and the same points can refer to the description of the dust-screen blockage detection device, and are not repeated herein.
Fig. 5 is a schematic structural diagram of an electronic device 20 according to an embodiment of the present invention, where the electronic device 20 includes a dust screen 21 and the dust screen blockage detection apparatus 10 according to any of the embodiments, and when the electronic device 20 operates at different altitudes, the blockage warning state of the dust screen 21 can be accurately warned, so as to reduce unnecessary labor.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a dust screen blocks up detection device which characterized in that includes: the heating device comprises a heating unit, a first temperature sensor, a second temperature sensor and a controller;
the heating unit is arranged at the downstream of the dust screen air duct, and the heating power of the heating unit is constant;
the first temperature sensor is arranged at the upstream of the dust screen air duct and used for acquiring initial first temperature at the upstream of the dust screen air duct when the dust screen is in a brand new state and continuously acquiring first temperature at the upstream of the dust screen air duct when the dust screen is in a working state;
the second temperature sensor is arranged in the dust screen air duct on the side, away from the dust screen, of the heating unit and is used for acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state and continuously acquiring a second temperature at the downstream of the dust screen air duct when the dust screen is in a working state;
the first temperature sensor, the second temperature sensor and the heating unit are all electrically connected with the controller; the controller is used for determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient, and determining that the dust screen is in a blockage warning state when the temperature difference value between the second temperature and the first temperature is larger than or equal to the blockage early warning value.
2. The device for detecting clogging of a dust screen according to claim 1, wherein when the dust screen is in a brand new state, a difference between the temperatures acquired by the second temperature sensor and the first temperature sensor is an initial temperature difference value, and when the dust screen is in a clogging alarm state, a difference between the temperatures acquired by the second temperature sensor and the first temperature sensor is an alarm temperature difference value; the preset coefficient is the ratio of the alarm temperature difference value to the initial temperature difference value at the same altitude, and the preset coefficient is a fixed value irrelevant to the altitude.
3. The dust screen blockage detection apparatus according to claim 2, wherein the dust screen blockage detection apparatus further comprises an alarm apparatus;
the controller controls the alarm device to send out warning information after determining that the dust screen is in a blocking warning state.
4. The dust screen blockage detection apparatus of claim 3, wherein the alarm device comprises a buzzer and/or an indicator light.
5. The dust screen blockage detection device of any one of claims 1 to 4, wherein the dust screen blockage detection device further comprises a memory;
the memory is electrically connected with the controller and used for storing the blockage early warning value;
the heat generating unit includes a heat generating resistor.
6. A dust-screen clogging detection method which is performed by the dust-screen clogging detection apparatus according to any one of claims 1 to 5, characterized by comprising:
acquiring an initial first temperature at the upstream of an air duct of the dust screen when the dust screen is in a brand new state;
acquiring an initial second temperature at the downstream of the dust screen air duct when the dust screen is in a brand new state;
determining a blockage early warning value according to the initial first temperature, the initial second temperature and a preset coefficient;
continuously acquiring a first temperature at the upstream of the dust screen air duct and a second temperature at the downstream of the dust screen air duct;
and if the temperature difference between the second temperature and the first temperature is greater than or equal to the blockage early warning value, determining that the dust screen is in a blockage warning state.
7. The method for detecting clogging of a dust screen according to claim 6, wherein when the dust screen is in a brand new state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is an initial temperature difference value, and when the dust screen is in a clogging alarm state, the temperature difference value obtained by the second temperature sensor and the first temperature sensor is an alarm temperature difference value; the preset coefficient is the ratio of the alarm temperature difference value to the initial temperature difference value at the same altitude, and the preset coefficient is a fixed value irrelevant to the altitude.
8. The dust screen blockage detection method according to claim 6 or 7, wherein after said determining that the dust screen is in a blockage warning state, the dust screen blockage detection method further comprises:
and generating the dustproof net blockage warning information.
9. The method according to claim 6 or 7, wherein after determining the clogging warning value according to the initial first temperature, the initial second temperature and a preset coefficient, the method further comprises:
and storing the blockage early warning value.
10. An electronic device comprising a dust screen and the dust screen clogging detection apparatus according to any one of claims 1 to 5.
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