Temperature control device for power communication cabinet

Abstract

The application relates to a temperature control device of a power communication cabinet, belonging to the technical field of power system equipment, which comprises a micro-processing module, an air extraction fan and an air exhaust fan, an infrared thermal imaging module, a temperature sensor, a fan control module, an alarm module and a power module; the infrared thermal imaging module is used for shooting the infrared thermal image of components and elements in the power communication cabinet body; the temperature sensor is used for detecting the ambient temperature outside the power communication cabinet body; when the power communication cabinet body is put into operation, the micro-processing module matches the gear of the air extraction fan and the air exhaust fan according to the temperature rise characteristics of the power communication cabinet body under the current ambient temperature, and controls the air extraction fan and the air exhaust fan to operate at the corresponding gear. The temperature control device starts the air extraction fan and the air exhaust fan when the power communication cabinet body starts to operate, the air volume provided by the fans can just meet the heat dissipation and cooling demand of the power communication cabinet body under the current ambient temperature, and is favorable for improving the stability and service life of the components and elements.

Description

Technical Field

[0001] This invention relates to a temperature control device for a power communication cabinet, belonging to the technical field of power system equipment. Background Technology

[0002] Power communication cabinets are a type of outdoor cabinet, referring to cabinets made of metal or non-metal materials that are directly exposed to natural weather conditions. Unauthorized personnel are not permitted to enter or operate the equipment. These cabinets provide an outdoor physical working environment and security system for wireless communication sites or wired network workstations. Power communication cabinets are suitable for outdoor environments such as roadsides, parks, rooftops, mountainous areas, and flat ground. The cabinets can accommodate base station equipment, power supply equipment, batteries, temperature control equipment, transmission equipment, and other supporting equipment, or provide installation space and heat exchange capacity for these devices. They provide reliable mechanical and environmental protection for the normal operation of the internal equipment.

[0003] The power communication cabinet generates heat during operation and is prone to high temperatures. To ensure the normal operation of the power communication cabinet, temperature control is required.

[0004] The existing temperature control method for power communication cabinets involves installing temperature measuring instruments inside the cabinet. When the temperature detected by the instruments exceeds a preset value, the fan is activated. With this method, the components inside the cabinet continue to heat up before the fan starts. The components operate at high temperatures for extended periods, which affects their operational stability and lifespan, and can easily lead to localized overheating within the cabinet.

[0005] Chinese invention patent CN108650859A discloses a cooling device and method for a server rack, comprising: at least one array fan module and a fan control module; the array fan module is disposed in a target through hole on the rack door; the array fan module corresponds one-to-one with the equipment placement area inside the rack and is used to reduce the temperature of the equipment placement area; when the rack door is closed, the target through hole and the equipment placement area corresponding to the array fan module are directly opposite each other; the fan control module is disposed at a preset position on the rack door and is used to obtain the temperature of the equipment placement area; the fan control module is connected to the array fan module and is also used to control the operating status of the array fan module corresponding to the equipment placement area according to the temperature of the equipment placement area, the operating status including on and off.

[0006] The above-mentioned example can only activate the fan when the temperature exceeds a certain preset threshold. It cannot dynamically adjust the temperature in real time according to the temperature inside the cabinet and the temperature of the components, resulting in poor applicability. Therefore, it urgently needs to be improved. Summary of the Invention

[0007] In order to overcome the problems in the prior art, the present invention designs a temperature control device for a power communication cabinet, which can meet the heat dissipation and cooling requirements of the power communication cabinet body under the current ambient temperature, and prevent local overheating inside the cabinet, thus ensuring that the power communication cabinet body is kept at a low temperature.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A temperature control device for a power communication cabinet includes a control unit, which includes a microprocessor module, an infrared thermal imaging module, a temperature sensor, and a fan control module, all of which are electrically connected to the microprocessor module.

[0010] The infrared thermal imaging module is used to capture infrared thermal images of the components inside the power communication cabinet and transmit the infrared thermal image data to the microprocessor module.

[0011] The temperature sensor is used to detect the ambient temperature outside the power communication cabinet and transmit the detected temperature value to the microprocessor module.

[0012] The fan control module is connected to an exhaust fan and a ventilation fan;

[0013] When the power communication cabinet is in operation, the microprocessor module matches the speed of the exhaust fan and the ventilation fan according to the temperature rise characteristics of the power communication cabinet body under the current ambient temperature, and sends a command to the fan control module to control the exhaust fan and the ventilation fan to operate at the corresponding speed.

[0014] Furthermore, the method for obtaining the temperature rise characteristic is as follows: Before the power communication cabinet is put into operation, infrared thermal images of the inside of the power communication cabinet are taken using an infrared thermal imaging module at various ambient temperatures. After a time interval, another infrared thermal image is taken using the infrared thermal imaging module at various ambient temperatures. The area enclosed by the closed curve in the two infrared thermal images is the heat-generating area. The two infrared thermal images are processed by grayscale and gridding to obtain the areas of the heat-generating areas in the two infrared thermal images as Sa and Sb, respectively. The difference between Sa and Sb is calculated as: ΔS = Sb - Sa. ρ is defined as the area growth rate, then ρ = ΔS / t, where t is the time interval between the two infrared thermal images. The area growth rate is the temperature rise characteristic. Then, a table showing the correspondence between ambient temperature T and area growth rate ρ, i.e., the T-ρ table, is obtained through the temperature rise characteristic.

[0015] Furthermore, the method for matching the speed of the exhaust fan and the ventilation fan is as follows: Based on the T-ρ table, an active heat dissipation test is conducted in advance for the corresponding area growth rate at various ambient temperatures. The active heat dissipation test involves controlling the speed of the exhaust fan and the ventilation fan to match the current temperature rise characteristics. After multiple tests, the correspondence between the temperature rise characteristics at different ambient temperatures and the fan speed can be obtained, that is, the T-ρ-d table is obtained, where d represents the speed of the exhaust fan and the ventilation fan. When the power communication cabinet is put into operation, the corresponding speed data is read from the T-ρ-d table according to the current ambient temperature, and then the exhaust fan and the ventilation fan are controlled to operate at that speed.

[0016] Furthermore, it also includes an airflow adjustment mechanism and a motor drive module. The airflow adjustment mechanism includes an air guide plate and an adjustment motor. The air guide plate is located directly above the exhaust fan. The adjustment motor is fixedly connected to the housing of the power communication cabinet body. The output shaft of the adjustment motor is arranged along the front-back direction of the housing, and the adjustment motor is located at the center of the lower part of the housing. The output shaft of the adjustment motor is fixedly connected to the middle of the air guide plate. The control signal input terminal of the motor drive module is connected to the control signal output terminal of the microprocessor module, and the drive signal output terminal of the motor drive module is connected to the drive terminal of the adjustment motor.

[0017] Furthermore, the method for adjusting the air guide plate is as follows: during the operation of the power communication cabinet body, the microprocessor module controls the infrared thermal imaging module to capture infrared thermal images of the inside of the shell at regular intervals. The microprocessor module performs coordinate processing on the infrared thermal images to obtain the angle between the center point of each bright area in the infrared thermal image and the vertical axis of the coordinate system. Then, the angle data is converted into the rotation angle of the air guide plate, and the adjustment motor is controlled to drive the air guide plate to rotate cyclically to the required angle.

[0018] Furthermore, the coordinate transformation method specifically includes:

[0019] S1: The infrared thermal image is converted to grayscale to obtain a grayscale image, and grayscale threshold ranges are set as the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range. The grayscale values ​​of each region in the grayscale image will fall into the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range, respectively.

[0020] S2: Perform grayscale processing on the grayscale image again, then mark the areas with grayscale values ​​within the first grayscale threshold range as bright areas, the areas with grayscale values ​​within the second grayscale threshold range as bright areas, and the areas with grayscale values ​​within the third grayscale threshold range as dark areas.

[0021] S3: Establish a Cartesian coordinate system so that the center point of the motor shaft coincides with the origin of the Cartesian coordinate system;

[0022] S4: The center point of each highlighted area in the grayscale image is calibrated, and the angle between the coordinates of the center point of each highlighted area and the vertical axis of the coordinate system is calculated using trigonometric functions. The angle is the rotation angle of the air guide plate.

[0023] Furthermore, the method for calibrating the center point of the highlighted area is as follows:

[0024] S41: On the edge of the highlighted area, take the point L with the smallest x-coordinate, the point R with the largest x-coordinate, the point B with the smallest y-coordinate, and the point T with the largest y-coordinate.

[0025] S42: Determine the first straight line based on the coordinates of point L and point R, and determine the second straight line based on the coordinates of point B and point T. Select the midpoint N of the first straight line and the midpoint M of the second straight line. Determine the third straight line based on the coordinates of point N and point M. The midpoint J of the third straight line is defined as the center point of the highlighted area.

[0026] Furthermore, it also includes an RJ45 network port module that connects to the microprocessor module.

[0027] Furthermore, it also includes a wireless communication module connected to the microprocessor module.

[0028] Furthermore, it also includes an alarm module for providing alarm prompts and a power supply module for providing electrical power, and both the alarm module and the power supply module are electrically connected to the microprocessor module.

[0029] Compared with the prior art, the present invention has the following features and beneficial effects:

[0030] 1. Through the design of this invention, the exhaust fan and ventilation fan can be activated as soon as the power communication cabinet starts running. The exhaust fan and ventilation fan rotate at a low speed, and the air volume provided at this time is just enough to meet the heat dissipation and cooling needs of the power communication cabinet at the current ambient temperature. This avoids the situation where the internal temperature of the power communication cabinet is too high due to continuous heat accumulation. In other words, it ensures that the power communication cabinet always operates at a low temperature and will not overheat. Moreover, the exhaust fan and ventilation fan will not waste too much power. Compared with the traditional "waiting" temperature control method, it is obvious that the "preemptive" temperature control method in this invention can avoid the continuous temperature rise due to heat accumulation inside the power communication cabinet. The components inside the power communication cabinet always operate at a low temperature, and the internal temperature of the power communication cabinet will not overheat. This is beneficial to improving the stability and service life of the components, and the fans always running at a low speed are less likely to be damaged.

[0031] 2. Through the configuration of this invention, during the operation of the power communication cabinet, infrared thermal images are captured at regular intervals. After the images are processed into coordinates to obtain the angle between the center point of each bright area and the vertical axis of the coordinate system, the rotation angle of the motor is adjusted based on the angle data. The motor is then adjusted to reciprocate and drive the air guide plate to rotate to the required angle. This allows the air guide plate to direct the cold air entering the housing to each bright area, i.e., the concentrated heat source. The cold air circulates and alternately blows on each concentrated heat source, which can improve the air cooling effect inside the housing and greatly improve the efficiency of heat dissipation and cooling. This enables "dynamic tracking" of concentrated heat sources inside the housing. No matter where concentrated heat occurs inside the housing, the air guide plate can direct the cold air to that area for targeted heat dissipation and cooling, effectively improving the cooling effect. Attached Figure Description

[0032] Figure 1 This is a hardware module connection diagram of the present invention;

[0033] Figure 2 This is a front sectional view of the present invention;

[0034] Figure 3 yes Figure 2 A magnified view of a portion of point A;

[0035] Figure 4 This is a first comparative schematic diagram of the infrared thermal images of the present invention;

[0036] Figure 5 This is a second comparative schematic diagram of the infrared thermal images of the present invention;

[0037] Figure 6 This is the first grayscale image in the coordinate processing of this invention;

[0038] Figure 7 This is a schematic diagram illustrating the calculation of the rotation angle of this invention;

[0039] Figure 8 This is a schematic diagram showing the center point of the highlighted area.

[0040] The attached diagram is labeled as follows: 1. Housing; 2. Air inlet; 3. Exhaust fan; 4. Air outlet; 5. Vent fan; 6. Temperature sensor; 7. Alarm module; 8. Air guide plate; 9. Air guide duct; 10. Adjustable motor; 11. Rotating shaft; 12. Microprocessor module; 13. Power supply module; 14. Infrared thermal imaging module; 15. Fan control module; 16. Motor drive module; 17. RJ45 network port module; 18. Button module; 19. Wireless communication module; 20. Image processing unit; 100. Main control unit. Detailed Implementation

[0041] The present invention will now be described in more detail with reference to the embodiments.

[0042] Example 1

[0043] Please see Figure 1 A temperature control device for a power communication cabinet includes a control unit 100, which includes a microprocessor module 12, an infrared thermal imaging module 14, a temperature sensor 6, and a fan control module 15, all of which are electrically connected to the microprocessor module 12.

[0044] The infrared thermal imaging module 14 is used to capture infrared thermal images of the components inside the power communication cabinet and transmit the infrared thermal image data to the microprocessor module 12.

[0045] Specifically, the output end of the infrared thermal imaging module 14 is connected to the data receiving end of the microprocessor module 12. The infrared thermal imaging module 14 is installed on the back of the cabinet door of the power communication cabinet body. When the cabinet door is closed, the imaging module of the infrared thermal imaging module 14 can be directly facing the various components inside the housing 1.

[0046] The output terminal of the temperature sensor 6 is connected to the sampling terminal of the microprocessor module 12. The temperature sensor 6 is used to detect the ambient temperature outside the power communication cabinet and transmit the detected temperature value to the microprocessor module 12. The temperature sensor 6 is installed outside the housing 1.

[0047] The control command input terminal of the fan control module 15 is connected to the control command output terminal of the microprocessor module 12, and the fan control module 15 is connected to the exhaust fan 3 and the exhaust fan 5.

[0048] It also includes an alarm module 7 for alerting and a power supply module 13 for providing power, and both the alarm module 7 and the power supply module 13 are electrically connected to the microprocessor module 12.

[0049] In this embodiment, when an abnormally high temperature occurs inside the cabinet, the microprocessor module 12 controls the alarm module 7 to issue an alarm signal. At this time, the exhaust fan 3 or the ventilation fan 5 may be malfunctioning.

[0050] Specifically, the control signal input terminal of the alarm module 7 is connected to the control signal output terminal of the microprocessor module 12, and the alarm module 7 is used to trigger an alarm according to the control signal of the microprocessor module 12; the alarm module 7 is installed outside the housing 1.

[0051] For details, please refer to Figure 2An air inlet 2 is provided at the bottom of the housing 1, and an exhaust fan 3 is installed at the air inlet 2. The exhaust fan 3 is used to send air from outside the housing 1 into the housing 1. An air outlet 4 is provided at the top of the housing 1, and an exhaust fan 5 is installed at the air outlet 4. The exhaust fan 5 is used to exhaust air from inside the housing 1 out of the housing 1. The drive ends of the exhaust fan 3 and the exhaust fan 5 are both connected to the drive signal output end of the fan control module 15.

[0052] When the power communication cabinet is put into operation, the microprocessor module 12 matches the speed of the exhaust fan 3 and the ventilation fan 5 according to the temperature rise characteristics of the power communication cabinet under the current ambient temperature, and sends a command to the fan control module 15 to control the exhaust fan 3 and the ventilation fan 5 to operate at the corresponding speed.

[0053] Furthermore, the method for obtaining the temperature rise characteristics is as follows: Before the power communication cabinet body is put into operation, infrared thermal images of the inside of the power communication cabinet body are taken by the infrared thermal imaging module 14 at various ambient temperatures. After a time interval, another infrared thermal image is taken by the infrared thermal imaging module 14 at various ambient temperatures. The area enclosed by the closed curve in the two infrared thermal images is the heat-generating area. The two infrared thermal images are grayscaled and meshed to obtain the areas of the heat-generating areas in the two infrared thermal images as Sa and Sb, respectively. The difference between Sa and Sb is calculated as: ΔS=Sb-Sa; ρ is defined as the area growth rate, then ρ=ΔS / t, where t is the time interval between the two infrared thermal images. The area growth rate is the temperature rise characteristic. Under different ambient temperatures, for the power communication cabinet body under standard operating conditions, the above method for obtaining temperature rise characteristics can be used to obtain the temperature rise characteristics of the power communication cabinet body under different temperatures without active heat dissipation measures. Thus, a table of the correspondence between ambient temperature T and area growth rate ρ can be obtained, i.e., the T-ρ table.

[0054] For details, please refer to Figure 4 Infrared thermal images of the interior of the housing 1 are captured by the infrared thermal imaging module 14. Figure 4 The closed curve in the infrared thermal image is a schematic diagram of the infrared thermal distribution. In the infrared thermal image, the brightness of the area enclosed by the closed curve is significantly higher than that of other areas. The area enclosed by the closed curve can correspond to the heating part inside the housing 1, that is, it can correspond to the position of the heating element inside the housing 1.

[0055] Please see Figure 5 When no active heat dissipation measures are taken inside the housing 1, the heat generated by the components continues to accumulate, and the center temperature of the heat-generating part becomes higher and higher. At the same time, the heat from the heat-generating part is transferred and radiated to the surroundings. In the infrared thermal image obtained in the next capture, the area enclosed by the closed curve gradually increases.

[0056] In this embodiment, calculation Figure 4 The area enclosed by the closed curve in the middle. Figure 4 The total area of ​​the region enclosed by the closed curve is Sa = S1 + S2 + S3 + S4;

[0057] The calculation process is as follows: the infrared thermal image is converted to grayscale to obtain a grayscale image. The outline of the closed curve can be clearly shown in the grayscale image. The bright and dark areas in the grayscale image represent the heat-generating parts and other parts, respectively.

[0058] A grayscale image is divided into a certain number of small grids. The area of ​​each small grid can be calculated based on the length, width and number of small grids of the grayscale image.

[0059] The number of small grids in the bright area is counted. The area enclosed by the closed curve can be calculated by the number of small grids and the area of ​​each small grid. It should be noted that the small grids through which the closed curve passes are also included in the count.

[0060] Therefore, the area values ​​of S1, S2, S3 and S4 can be obtained respectively through the above method, and then the area of ​​Sa can be obtained.

[0061] Similarly, statistical analysis can be performed using the methods described above. Figure 5 The area S0 of the region enclosed by the closed curve can be obtained. Figure 5 The total area of ​​the region enclosed by the closed curve is Sb = S0.

[0062] Calculate the difference ΔS between Sa and Sb, ΔS = Sb - Sa; define ρ as the area growth rate, ρ = ΔS / t, where t is the time interval between two consecutive infrared thermal images, i.e., the shooting period;

[0063] Among them, the rate of area growth is the characteristic of temperature rise;

[0064] Under different ambient temperatures, for the power communication cabinet body under standard operating conditions, the above method can be used to obtain the temperature rise characteristics of the power communication cabinet body under different temperatures without active heat dissipation measures, thereby obtaining the corresponding relationship table between ambient temperature T and area growth rate ρ, i.e., the T-ρ table, and storing the T-ρ table data in the storage unit of the microprocessor module 12.

[0065] Specifically, the method for matching the speed of exhaust fan 3 and exhaust fan 5 is as follows: According to the T-ρ table, an active heat dissipation test is conducted in advance for the corresponding area growth rate at various ambient temperatures. That is, the speed of exhaust fan 3 and exhaust fan 5 is controlled (exhaust fan 3 and exhaust fan 5 always maintain the same speed) so that the speed of exhaust fan 3 and exhaust fan 5 can match the current temperature rise characteristics (that is, the cooling rate of the fan to the power communication cabinet body is greater than the heating rate of the power communication cabinet body) so as to cool down the power communication cabinet.

[0066] The active cooling test involves controlling the speed of exhaust fan 3 and exhaust fan 5 to match the current temperature rise characteristics. After multiple tests, the correspondence between the temperature rise characteristics under different ambient temperatures and the fan speed can be obtained, which yields the T-ρ-d table, where d represents the speed of exhaust fan 3 and exhaust fan 5. When the power communication cabinet is put into operation, the corresponding speed data is read from the T-ρ-d table according to the current ambient temperature, and then the exhaust fan 3 and exhaust fan 5 are controlled to operate at that speed.

[0067] In this embodiment, after multiple experiments, the correspondence between the temperature rise characteristics (i.e., the area growth rate ρ) and the fan speed d can be obtained, and then the T-ρ-d table can be obtained, where d represents the speed of the exhaust fan 3 and the ventilation fan 5.

[0068] Specifically, when the power communication cabinet is put into operation, the microprocessor module 12 collects the ambient temperature detection value output by the temperature sensor 6, and reads the corresponding speed of the exhaust fan 3 and the exhaust fan 5 from the T-ρ-d table according to the current ambient temperature value. The microprocessor module 12 then sends the speed information of the exhaust fan 3 and the exhaust fan 5 to the fan control module 15 through the instruction. The fan control module controls the exhaust fan 3 and the exhaust fan 5 to rotate at the speed.

[0069] In this embodiment, an RJ45 network port module 17 is also included. The RJ45 network port module 17 is connected to the data transceiver end of the microprocessor module. The RJ45 network port module 17 can connect the present invention to a local area network or the Internet.

[0070] In this embodiment, a wireless communication module 19 is also included. The wireless communication module 19 is connected to the communication terminal of the microprocessor module 12. The wireless communication module 19 is used for communication with external devices or cloud servers.

[0071] In this embodiment, the wireless communication module 19 is one or more of the following: WIFI module, ZigBee module, and Lora module.

[0072] As can be seen from the above description, the beneficial effects of the present invention are as follows: the above solution can realize the start of the exhaust fan 3 and the exhaust fan 5 when the power communication cabinet body starts running. The exhaust fan 3 and the exhaust fan 5 rotate at a low speed. At this time, the air volume provided can just meet the heat dissipation and cooling needs of the power communication cabinet body under the current ambient temperature, and avoid the situation where the temperature inside the power communication cabinet body is too high due to the continuous accumulation of heat. That is, it ensures that the power communication cabinet body always operates at a low temperature and will not overheat. Moreover, the exhaust fan 3 and the exhaust fan 5 will not waste too much power.

[0073] Traditional power communication cabinets rely on a simple temperature control method: a temperature sensor is installed inside the cabinet, and the fan is activated when the detected temperature exceeds a preset value. However, this method results in components inside the cabinet continuously heating up before the fan starts. Prolonged operation at high temperatures negatively impacts component stability and lifespan, and can easily lead to localized overheating within the cabinet. Furthermore, to accelerate heat dissipation, the fan typically operates at high speeds upon startup, making it prone to damage and requiring frequent maintenance, thus increasing the maintenance burden.

[0074] In this invention, compared to the traditional "waiting" temperature control method, the "advance" temperature control method can obviously avoid the continuous temperature rise caused by heat accumulation inside the power communication cabinet. The components inside the power communication cabinet always operate at a lower temperature, and there will be no overheating inside the power communication cabinet. This is beneficial to improving the stability and service life of the components, and the fan always operates at a lower speed, making it less prone to damage.

[0075] Example 2

[0076] A temperature control device for a power communication cabinet differs from Embodiment 1 in that:

[0077] Please see Figure 2 and Figure 3 In this embodiment, a wind direction adjustment mechanism and a motor drive module 16 are also provided inside the housing 1 of the power communication cabinet body. The wind direction adjustment mechanism includes a wind guide plate 8 and an adjustment motor 10. The wind guide plate 8 is located directly above the exhaust fan 3, and multiple wind guide slots 9 are provided on the wind guide plate 8 (the structure of the wind guide plate 8 is similar to the structure of the air vent of a car air conditioner).

[0078] The regulating motor 10 is fixedly connected to the housing 1 of the power communication cabinet body. The output shaft of the regulating motor 10 is arranged along the front and rear direction of the housing 1, and the regulating motor 10 is located at the center of the lower part of the housing 1. The output shaft of the regulating motor 10 is fixedly connected to the middle of the air guide plate 8. The control signal input terminal of the motor drive module 16 is connected to the control signal output terminal of the microprocessor module 12, and the drive signal output terminal of the motor drive module 16 is connected to the drive terminal of the regulating motor 10.

[0079] Specifically, when the adjusting motor 10 rotates, it can drive the air guide plate 8 to rotate synchronously, thereby changing the left and right tilt angle of the air guide plate 8.

[0080] Please refer to Figure 6 and Figure 7 The adjustment method of the air guide plate 8 is as follows: During the operation of the power communication cabinet body, the microprocessor module 12 controls the infrared thermal imaging module 14 to capture infrared thermal images inside the shell 1 at regular intervals. The microprocessor module 12 performs coordinate processing on the infrared thermal images to obtain the angle between the center point of each bright area in the infrared thermal image and the vertical axis of the coordinate system. Then, the angle data is converted into the rotation angle of the air guide plate 8, and the adjustment motor 10 is controlled to drive the air guide plate 8 to rotate repeatedly to the required angle.

[0081] In this embodiment, please refer to Figure 6 and Figure 7 The specific method for coordinate transformation is as follows:

[0082] S1: The infrared thermal image is converted to grayscale to obtain a grayscale image, and grayscale threshold ranges are set as the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range. The grayscale values ​​of each region in the grayscale image will fall into the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range, respectively.

[0083] Please see Figure 6 When an infrared thermal image is converted to grayscale, there will be a loss due to the heat transfer and radiation from the heated area to the surroundings. Therefore, there will be areas with different grayscale values ​​in the heated area in the grayscale image. The closer to the heated center, the larger the grayscale value. The grayscale values ​​of areas I, II, III, IV and V decrease in that order.

[0084] Specifically, grayscale threshold ranges are set as the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range. The grayscale values ​​of regions I, II, III, IV, and V will fall into the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range, respectively.

[0085] S2: Please refer to Figure 7The grayscale image is then converted to grayscale again. The regions with grayscale values ​​within the first grayscale threshold range (regions I and II in this embodiment) are marked as bright regions, the regions with grayscale values ​​within the second grayscale threshold range (regions III and IV in this embodiment) are marked as bright regions, and the regions with grayscale values ​​within the third grayscale threshold range (region V in this embodiment) are marked as dark regions.

[0086] This allows us to identify bright, light, and dark areas in the image, with the bright areas best reflecting the heat generation of the components.

[0087] S3: Establish a plane rectangular coordinate system so that the center point of the rotating shaft 11 of the adjusting motor 10 coincides with the origin of the plane rectangular coordinate system;

[0088] S4: Please refer to Figure 7 The center point of each bright area in the grayscale image is marked, and the angle between the coordinates of the center point of each bright area and the vertical axis of the coordinate system is calculated using trigonometric functions. The angle is the rotation angle of the air guide plate 8.

[0089] For details, please refer to Figure 8 In this embodiment, the method for calibrating the center point of the highlighted area is as follows:

[0090] S41: On the edge of the highlighted area, take the point L with the smallest x-coordinate, the point R with the largest x-coordinate, the point B with the smallest y-coordinate, and the point T with the largest y-coordinate.

[0091] S42: Determine the first straight line based on the coordinates of point L and point R, and determine the second straight line based on the coordinates of point B and point T. Select the midpoint N of the first straight line and the midpoint M of the second straight line. Determine the third straight line based on the coordinates of point N and point M. The midpoint J of the third straight line is defined as the center point of the highlighted area.

[0092] Then, the center point coordinates of each highlighted area can be obtained, and the angle between the center point coordinates of each highlighted area and the vertical axis of the coordinate system can be calculated using trigonometric functions.

[0093] Please see Figure 7 Assume there are two bright areas in the grayscale image, and the angles between the center point of the two bright areas and the vertical axis of the coordinate system are α and β, respectively. α and β are the rotation angles of the air guide plate 8.

[0094] After the image processing unit 20 obtains the included angle data, the microprocessor module 12 converts the included angle data into control parameters for the regulating motor 10. In this embodiment, the regulating motor 10 is a stepper motor. The microprocessor module 12 converts the included angle data into the number of rotation steps of the stepper motor and sends the number of rotation steps to the motor drive module 16. The motor drive module 16 outputs a corresponding number of pulse signals to the stepper motor, thereby controlling the regulating motor 10 to drive the air guide plate 8 to rotate to angles α and β.

[0095] During the operation of the power communication cabinet, infrared thermal images are captured at regular intervals. After the images are processed into coordinates, the angle between the center point of each bright area and the vertical axis of the coordinate system is obtained. Based on the angle data, the rotation angle of the adjustment motor 10 is obtained. The adjustment motor 10 reciprocates to drive the air guide plate 8 to rotate to the required angle, so that the air guide plate 8 can guide the cold air entering the shell 1 to each bright area, i.e. the heat concentration part. The cold air circulates and blows on each heat concentration part, which can make the air cooling effect in the shell 1 better and greatly improve the heat dissipation efficiency.

[0096] This enables "dynamic tracking" of concentrated heat-generating areas within the housing 1. Regardless of which part of the housing 1 experiences concentrated heat generation, the air guide plate 8 can direct cool air to that part for targeted heat dissipation and cooling, effectively improving the cooling effect.

[0097] In the description of this invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0098] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0099] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A temperature control device for a power communication cabinet, characterized in that: It includes a control unit, which includes a microprocessor module, an infrared thermal imaging module, a temperature sensor, and a fan control module, all of which are electrically connected to the microprocessor module. The infrared thermal imaging module is used to capture infrared thermal images of the internal components of the power communication cabinet and transmit the infrared thermal image data to the microprocessor module. The temperature sensor is used to detect the ambient temperature outside the power communication cabinet and transmit the detected temperature value to the microprocessor module; The fan control module is connected to both an exhaust fan and a ventilation fan; When the power communication cabinet is put into operation, the microprocessor module matches the speed of the exhaust fan and the ventilation fan according to the temperature rise characteristics of the power communication cabinet body under the current ambient temperature, and sends a command to the fan control module to control the exhaust fan and the ventilation fan to operate at the corresponding speed. Before the power communication cabinet is put into operation, infrared thermal images of the cabinet are taken at various ambient temperatures using an infrared thermal imaging module. After a time interval, another infrared thermal image is taken at various ambient temperatures using the same module. The area enclosed by the closed curve in the two infrared thermal images is the heat-generating area. The two infrared thermal images are then processed by grayscale and meshing to obtain the areas of the heat-generating areas in the two images, Sa and Sb, respectively. The difference between Sa and Sb is calculated as: ΔS = Sb - Sa. ρ is defined as the area growth rate, then ρ = ΔS / t, where t is the time interval between the two infrared thermal images. The area growth rate is the temperature rise characteristic. A table showing the correspondence between ambient temperature T and area growth rate ρ, i.e., the T-ρ table, is obtained through the temperature rise characteristic. The specific method for matching the speed of the exhaust fan and the ventilation fan is as follows: Based on the T-ρ table, active heat dissipation tests are conducted in advance for the corresponding area growth rate at various ambient temperatures. The active heat dissipation test involves controlling the speed of the exhaust fan and the ventilation fan to match the current temperature rise characteristics. After multiple tests, the correspondence between the temperature rise characteristics at different ambient temperatures and the fan speed can be obtained, resulting in the T-ρ-d table, where d represents the speed of the exhaust fan and the ventilation fan. When the power communication cabinet is put into operation, the corresponding speed data is read from the T-ρ-d table according to the current ambient temperature, and then the exhaust fan and the ventilation fan are controlled to operate at that speed.

2. The temperature control device for a power communication cabinet according to claim 1, characterized in that: It also includes an airflow adjustment mechanism and a motor drive module. The airflow adjustment mechanism includes an air guide plate and an adjustment motor. The air guide plate is located directly above the exhaust fan. The adjustment motor is fixedly connected to the housing of the power communication cabinet body. The output shaft of the adjustment motor is arranged along the front-back direction of the housing, and the adjustment motor is located at the center of the lower part of the housing. The output shaft of the adjustment motor is fixedly connected to the middle of the air guide plate. The control signal input terminal of the motor drive module is connected to the control signal output terminal of the microprocessor module, and the drive signal output terminal of the motor drive module is connected to the drive terminal of the adjustment motor.

3. The temperature control device for a power communication cabinet according to claim 2, characterized in that: The method for adjusting the air guide plate is as follows: During the operation of the power communication cabinet, the microprocessor module controls the infrared thermal imaging module to capture infrared thermal images of the inside of the shell at regular intervals. The microprocessor module performs coordinate processing on the infrared thermal images to obtain the angle between the center point of each bright area in the infrared thermal image and the vertical axis of the coordinate system. Then, the angle data is converted into the rotation angle of the air guide plate, and the adjustment motor is controlled to drive the air guide plate to rotate cyclically to the required angle.

4. The temperature control device for a power communication cabinet according to claim 3, characterized in that: The specific method for coordinate transformation is as follows: S1: The infrared thermal image is converted to grayscale to obtain a grayscale image, and grayscale threshold ranges are set as the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range. The grayscale values ​​of each region in the grayscale image will fall into the first grayscale threshold range, the second grayscale threshold range, and the third grayscale threshold range, respectively. S2: Perform grayscale processing on the grayscale image again, then mark the areas with grayscale values ​​within the first grayscale threshold range as bright areas, the areas with grayscale values ​​within the second grayscale threshold range as bright areas, and the areas with grayscale values ​​within the third grayscale threshold range as dark areas. S3: Establish a Cartesian coordinate system so that the center point of the motor shaft coincides with the origin of the Cartesian coordinate system; S4: The center point of each highlighted area in the grayscale image is calibrated, and the angle between the coordinates of the center point of each highlighted area and the vertical axis of the coordinate system is calculated using trigonometric functions. The angle is the rotation angle of the air guide plate.

5. The temperature control device for a power communication cabinet according to claim 4, characterized in that: The method for calibrating the center point of the highlighted area is as follows: S41: On the edge of the highlighted area, take the point L with the smallest x-coordinate, the point R with the largest x-coordinate, the point B with the smallest y-coordinate, and the point T with the largest y-coordinate. S42: Determine the first straight line based on the coordinates of point L and point R, and determine the second straight line based on the coordinates of point B and point T. Select the midpoint N of the first straight line and the midpoint M of the second straight line. Determine the third straight line based on the coordinates of point N and point M. The midpoint J of the third straight line is defined as the center point of the highlighted area.

6. The temperature control device for a power communication cabinet according to claim 1, characterized in that: It also includes an RJ45 network port module that connects to the microprocessor module.

7. The temperature control device for a power communication cabinet according to claim 1, characterized in that: It also includes a wireless communication module that connects to the microprocessor module.

8. The temperature control device for a power communication cabinet according to claim 1, characterized in that: It also includes an alarm module for providing alarm signals and a power supply module for providing electrical power, and both the alarm module and the power supply module are electrically connected to the microprocessor module.

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