Electrical equipment heat dissipation control method, controller and electrical equipment

Abstract

The application provides a kind of electric equipment heat dissipation control method, controller and electric equipment, it is related to power electronic equipment control technical field.The electric equipment includes main equipment, heat dissipation equipment and shell, and heat dissipation equipment is used to dissipate heat for main equipment;Heat dissipation equipment includes first heat dissipation fan and second heat dissipation fan, and first heat dissipation fan and second heat dissipation fan are provided with common heat dissipation channel;The air outlet of first heat dissipation fan and the air inlet of second heat dissipation fan are respectively arranged on the shell;The method comprises: when the ambient temperature of electric equipment is greater than the preset ambient temperature threshold, control first heat dissipation fan to open;When first heat dissipation fan opens, if ambient temperature is not greater than the preset ambient temperature threshold, the operating state of second heat dissipation fan is obtained;If the operating state of second heat dissipation fan is open, control first heat dissipation fan to keep open.The application can effectively avoid the accumulation of heat in the equipment, prevent the phenomenon of local overheating.

Description

Technical Field

[0001] This invention relates to the field of power electronic equipment control technology, and in particular to a heat dissipation control method, controller and electrical equipment for electrical equipment. Background Technology

[0002] In industrial production, power transmission, and new energy power generation, various high-power electrical equipment, such as frequency converters, transformers, reactive power compensation devices, and motor controllers, are core components of the system and generate a large amount of heat during operation. To ensure the safe and stable operation of these devices, they are usually equipped with cooling systems.

[0003] However, the inventors discovered that the heat dissipation control logic of existing electrical equipment is generally quite simple, with each heat dissipation-related structure operating independently. This independent heat dissipation control method often results in problems such as untimely heat dissipation and low heat dissipation efficiency, which not only accelerates the aging of equipment components and shortens the service life of the equipment, but may also cause equipment failure due to localized overheating, increasing operation and maintenance costs. Summary of the Invention

[0004] This invention provides a heat dissipation control method, controller, and electrical equipment for electrical devices, in order to solve the problem that the heat dissipation control logic of existing electrical devices is generally simple, which easily leads to local temperature accumulation inside the electrical equipment and the inability to dissipate it in time.

[0005] In a first aspect, embodiments of the present invention provide a method for heat dissipation control of electrical equipment. The electrical equipment includes a main body, a heat dissipation device, and a casing. The heat dissipation device is used to dissipate heat from the main body. The heat dissipation device includes a first cooling fan and a second cooling fan, with a common heat dissipation channel between the first cooling fan and the second cooling fan. The air outlet of the first cooling fan and the air inlet of the second cooling fan are respectively disposed on the casing. The main body is disposed inside the electrical equipment. The method includes: Monitor the ambient temperature of electrical equipment; When the ambient temperature is higher than the preset ambient temperature threshold, the first cooling fan is turned on. If the ambient temperature is not greater than the preset ambient temperature threshold when the first cooling fan is turned on, the operating status of the second cooling fan is obtained. If the second cooling fan is in the "on" state, then the first cooling fan will be kept on.

[0006] In one possible implementation, the method also includes: Collect the inlet temperature of the air inlet and the outlet temperature of the air outlet; If the temperature difference between the air outlet and the air inlet is greater than the preset temperature difference threshold, then the first and second cooling fans will be turned on. The second cooling fan operates at a preset minimum speed.

[0007] In one possible implementation, the method also includes: Monitor the ambient humidity of electrical equipment; When the electrical equipment is in the start-up state, if the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is greater than the preset ambient temperature threshold, the first cooling fan and the second cooling fan will be turned on. When the electrical equipment is in the start-up state, if the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is less than the preset ambient temperature threshold, the first cooling fan will be turned off and the second cooling fan will be turned on. When the electrical equipment is in a stopped state, if the ambient humidity is greater than the preset ambient humidity threshold, the first cooling fan is controlled to run in reverse for a preset time.

[0008] In one possible implementation, the method also includes: Detect the temperature of the main equipment; If the device temperature exceeds the preset device temperature threshold, the second cooling fan will be turned on.

[0009] In one possible implementation, the method also includes: Perform fault detection on the first cooling fan; When the first cooling fan fails and the ambient temperature is higher than the preset ambient temperature threshold, the second cooling fan is turned on. When the ambient temperature is not greater than the preset ambient temperature threshold and the fan temperature is not greater than the preset fan temperature threshold, the second cooling fan is controlled to shut down.

[0010] In one possible implementation, the method also includes: Perform fault detection on the second cooling fan; When the second cooling fan fails and the equipment temperature exceeds the preset equipment temperature threshold, the first cooling fan is turned on. When the equipment temperature is not greater than the preset equipment temperature threshold and the ambient temperature is not greater than the preset ambient temperature threshold, the first cooling fan is shut down.

[0011] In one possible implementation, the first and second cooling fans are fault detected in the following manner: Obtain the first operating current and the second operating current corresponding to the first cooling fan and the second cooling fan; If the first operating current is greater than the preset current threshold, then determine whether the first operating current is within the preset current operating range; If not, then the first cooling fan is considered faulty; Alternatively, if the first operating current is greater than the preset current threshold, the first wind speed of the first cooling fan is collected after the first preset time interval. If the first wind speed is less than the preset wind speed, the first cooling fan is determined to be faulty. If the second operating current is greater than the preset current threshold, then determine whether the second operating current is within the preset current operating range; If not, the second cooling fan is considered faulty; Alternatively, if the second operating current is greater than the preset current threshold, the second wind speed of the second cooling fan is collected after the second preset time interval. If the second wind speed is less than the preset wind speed, the second cooling fan is determined to be faulty.

[0012] In one possible implementation, the electrical equipment is a transformer; a first cooling fan is located at the top of the transformer; and a second cooling fan is located at the bottom of the transformer.

[0013] In a second aspect, embodiments of the present invention also provide a controller, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect or any possible implementation thereof.

[0014] Thirdly, embodiments of the present invention also provide an electrical device, including a main device, a heat dissipation device, a housing, and a controller as provided in the second aspect, wherein the heat dissipation device is used to dissipate heat for the main device; the heat dissipation device includes a first heat dissipation fan and a second heat dissipation fan, and a common heat dissipation channel is provided between the first heat dissipation fan and the second heat dissipation fan; the air outlet of the first heat dissipation fan and the air inlet of the second heat dissipation fan are respectively provided on the housing; the main device is disposed inside the electrical device.

[0015] In this embodiment of the invention, in addition to a conventional second cooling fan, a first cooling fan is also provided. A common heat dissipation channel is provided between the first and second cooling fans. The first cooling fan is used for air outlet, and the second cooling fan is used for air inlet. During the heat dissipation process, the first and second cooling fans form a through airflow, working together to dissipate heat and ensure the heat dissipation effect of the heat-generating component. After the first cooling fan is turned on, even if the ambient temperature reaches the shutdown condition of the first cooling fan, it is not immediately turned off. Instead, the operating status of the second cooling fan is detected. When the second cooling fan is on, the first cooling fan continues to operate, and the heat inside the electrical equipment is smoothly discharged through the common heat dissipation channel, preventing internal heat accumulation. Through the collaborative working mechanism of the two cooling devices, the inability to quickly dissipate heat inside the equipment can be effectively avoided, preventing local overheating. At the same time, the condition constraint combined with the ambient temperature threshold prevents the cooling devices from starting and stopping randomly, balancing heat dissipation stability and energy saving. Attached Figure Description

[0016] Figure 1 This is a front view of the electrical equipment provided in an embodiment of the present invention; Figure 2 This is a front view of another electrical device provided in an embodiment of the present invention; Figure 3 This is a front view of another electrical device provided in an embodiment of the present invention; Figure 4 This is a flowchart illustrating the implementation of the heat dissipation control method for electrical equipment provided in this embodiment of the invention. Detailed Implementation

[0017] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] This invention provides a method for controlling the heat dissipation of electrical equipment. Figure 1 This is a front view of the electrical equipment provided in the embodiments of the present invention; such as Figure 1 As shown, the electrical equipment includes a main body 10, a heat dissipation device 20, and a housing 30. The heat dissipation device 20 is used to dissipate heat from the main body 10. The heat dissipation device 20 includes a first heat dissipation fan 21 and a second heat dissipation fan 22. A common heat dissipation channel is provided between the air outlet of the first heat dissipation fan 21 and the air inlet of the second heat dissipation fan 22. The air outlet of the first heat dissipation fan 21 and the air inlet of the second heat dissipation fan 22 are respectively provided on the housing 30. The main body 10 is located inside the electrical equipment.

[0019] Among them, Figure 1 In this configuration, the first cooling fan 21 can be located on the top of the outer side of the housing 30, and the second cooling fan 22 can be located on the inner side of the housing 30.

[0020] Figure 2 This is a front view of another electrical device provided in an embodiment of the present invention; Figure 2 In this configuration, the first cooling fan 21 can be located at the top inside the housing 30, and the second cooling fan 22 can be located at the bottom outside the housing 30.

[0021] Figure 3 This is a front view of another electrical device provided in an embodiment of the present invention; Figure 3 In this configuration, the first cooling fan 21 can be located at the top inside the housing 30, and the second cooling fan 22 can be located at the bottom inside the housing 30.

[0022] based on Figures 1 to 3It can be seen that the relative positions of the first cooling fan 21 and the second cooling fan 22 can be set according to actual needs. In addition to the top and bottom, they can also be set on the side. The two need to ensure that there is a common heat dissipation channel between them, and the airflow path of the common heat dissipation channel must flow through the main equipment 10, or in other words, the main equipment 10 must be located in the common heat dissipation channel. Among them, the heat dissipation effect is optimal when the airflow of the common heat dissipation channel is mainly concentrated on the heat dissipation of the main equipment 10.

[0023] Existing electrical equipment typically only has a single internal heat dissipation structure to cool the main equipment. Although some equipment may have multiple heat dissipation devices inside, the outer casing lacks matching heat dissipation devices. This results in the inability of internal and external heat dissipation to work together, which can easily lead to heat accumulation inside the equipment, a single heat dissipation path, uneven heat dissipation, local overheating, and low heat dissipation efficiency, making it difficult to ensure the stable operation of the main equipment.

[0024] To address this issue, this invention employs a first heat dissipation device 21 and a second heat dissipation device 22, forming a complete heat dissipation structure with internal and external components working in tandem. This broadens the heat dissipation path and improves heat dissipation uniformity. Combined with corresponding heat dissipation control methods, the two heat dissipation devices work collaboratively, not only preventing the external environment from affecting the internal structure but also quickly removing heat generated by the main equipment, preventing internal heat buildup, effectively reducing the operating temperature of the main equipment, improving overall heat dissipation efficiency and equipment reliability, and extending the equipment's service life.

[0025] In this embodiment, the electrical equipment can be various high-power heat-generating electrical equipment such as power conversion equipment, power transmission equipment, energy storage converters, frequency converters, inverters, transformers, reactive power compensation devices, motor controllers, and high-voltage switchgear. The main equipment 10 refers to the core heat-generating components inside the electrical equipment, including but not limited to: power modules, reactors, transformer bodies, motor stators / rotors, busbars, insulated gate bipolar transistor (IGBT) modules, rectifier-inverter components, etc.

[0026] The following is through Figure 4 ,right Figures 1 to 3 The heat dissipation control methods for the provided electrical equipment are described in detail: Figure 4 This is a flowchart illustrating the implementation of the heat dissipation control method for electrical equipment provided in an embodiment of the present invention. Figure 4 As shown, the method may include: Step 110: Monitor the ambient temperature of the electrical equipment.

[0027] Electrical equipment is mainly used in indoor and outdoor scenarios such as industrial production, factory workshops, substations, photovoltaic and wind power plants, energy storage power stations, rail transit, and data centers. It is typically installed in enclosed cabinets, box-type structures, electrical enclosures, or outdoor cabinets, operating in a natural air environment. Its operating environment temperature fluctuates with seasons, day and night, sunlight, and on-site conditions. Especially in enclosed, poorly ventilated, or high-temperature environments, external heat can easily penetrate the equipment, leading to a significant increase in internal temperature. Since the equipment's interior is a relatively enclosed space, the main equipment 10 continuously generates a large amount of heat during operation. Relying solely on internal heat dissipation is insufficient to simultaneously address the combined effects of internal heat generation and external heat intrusion, easily leading to heat accumulation and excessively high internal temperatures, thus affecting the safe and stable operation of the equipment. Therefore, a first cooling fan 21 is installed on the electrical equipment. On one hand, it blocks external heat from entering the equipment, reducing the impact of external ambient temperature on internal operating conditions; on the other hand, it works in conjunction with the internal second cooling fan 22 to quickly dissipate internal heat, thereby maintaining a stable and reliable operating environment.

[0028] In order to accurately determine the impact of the external environment on electrical equipment and to reasonably control the operating status of the first heat dissipation device 21, it is necessary to collect the ambient temperature of the electrical equipment in real time.

[0029] For example, a temperature sensor is arranged inside the housing 30 of the electrical equipment or at a preset position inside the equipment. The temperature sensor is electrically connected to the controller. The temperature sensor collects the ambient temperature of the space where the electrical equipment is located in real time and transmits the collected temperature signal to the controller. The controller receives and analyzes the temperature signal to obtain the ambient temperature of the electrical equipment.

[0030] By collecting ambient temperature data, the temperature of the external environment can be accurately identified, providing a reliable basis for the start-up, shutdown, operation, and coordinated control of the first cooling fan 21, thereby achieving more intelligent, energy-efficient, and more realistic heat dissipation control.

[0031] Step 120: When the ambient temperature is greater than the preset ambient temperature threshold, control the first cooling fan 21 to turn on.

[0032] When the ambient temperature exceeds the preset ambient temperature threshold, it indicates that the external ambient temperature is high, and external heat can easily penetrate into the electrical equipment, exacerbating the internal temperature rise. At this time, controlling the first cooling fan 21 to turn on serves two purposes: firstly, it forms an outward airflow barrier, preventing high-temperature external air from flowing back into the equipment and reducing the impact of external high temperatures on the internal working environment; secondly, it allows the accumulated heat inside the equipment to be quickly dissipated through the common heat dissipation channel between the first cooling fan 21 and the second cooling fan 22, preventing the main equipment 10 from overheating due to the superposition of internal and external heat, and ensuring the equipment can still operate safely and stably in high-temperature environments.

[0033] Step 130: If the ambient temperature is not greater than the preset ambient temperature threshold when the first cooling fan 21 is turned on, then obtain the operating status of the second cooling fan 22.

[0034] If the ambient temperature is not higher than the preset ambient temperature threshold when the first cooling fan 21 is turned on, it indicates that the current ambient temperature is low and the risk of external heat intrusion is small. Theoretically, the first cooling fan 21 can be turned off at this time.

[0035] However, at this time, the main equipment 10 inside the electrical equipment may still be in a state of working heat, and relying solely on the ambient temperature may overlook the actual internal heat dissipation needs. If the first heat dissipation device 21 is directly shut off, the internal heat will not be able to be quickly dissipated, and residual heat will easily accumulate inside the casing 30, causing the internal temperature to rise and affecting the stable operation of the main equipment 10. Therefore, it is necessary to continue to monitor the operating status of the second cooling fan 22, using the actual internal working conditions as the basis for coordinated control, to ensure matching of internal and external heat dissipation, continuous and reliable heat dissipation process, and to prevent the internal residual heat from failing to dissipate in time and causing the temperature to rise.

[0036] Step 140: If the second cooling fan 22 is in the on state, then control the first cooling fan 21 to remain on.

[0037] If the second cooling fan 22 is on, it indicates that the main equipment 10 inside the electrical equipment is still generating heat and requires forced cooling. At this time, even if the external ambient temperature has decreased and there is no risk of external heat backflow, it is still necessary to keep the first cooling fan 21 on to form a coordinated internal and external cooling system with the second cooling fan 22, so as to continue to quickly expel the heat accumulated inside to the outside, and avoid the accumulation of residual heat and temperature rebound caused by turning off the first cooling fan 21, thereby ensuring that the main equipment 10 is always in a safe and stable operating temperature range.

[0038] In summary, this embodiment of the invention achieves a coordinated, intelligent, stable, and reliable heat dissipation effect by real-time monitoring of the ambient temperature of the electrical equipment and combining the linkage control of the first cooling fan 21 and the second cooling fan 22. When the ambient temperature is high, the first cooling fan 21 is turned on in time, which can not only prevent the backflow of high-temperature air from the outside into the equipment, but also quickly dissipate internal heat. When the ambient temperature drops, the first cooling fan 21 is not simply turned off based on the ambient temperature, but is further judged based on the operating status of the internal second cooling fan 22. If internal heat dissipation is still required, the first cooling fan 21 is kept on, thereby avoiding the accumulation of internal residual heat and temperature rise caused by blindly shutting down based solely on the ambient temperature.

[0039] Through the above control logic, while blocking the influence of external heat, it is possible to ensure continuous, stable and efficient heat dissipation inside the electrical equipment, avoid the superposition of internal and external heat leading to overheating of the equipment, effectively improve the adaptability and reliability of the heat dissipation system, reduce the risk of equipment temperature rise, extend the service life of the main equipment, and enable the electrical equipment to operate safely and stably in complex and ever-changing industrial environments.

[0040] The control logic of the method provided by the present invention in other scenarios is described below through some optional embodiments: In an optional embodiment, after obtaining the operating status of the second cooling fan 22 in step 130, the method further includes: If the second cooling fan 22 is in the off state, control the first cooling fan 21 to turn off.

[0041] After obtaining the operating status of the second cooling fan 22, if it is determined that the second cooling fan 22 is off, it indicates that the main equipment 10 inside the electrical equipment no longer generates significant heat, and the internal heat dissipation requirement has been eliminated. At this time, the external ambient temperature is low, there is no risk of heat backflow, and there is no continuous heat source inside. Continuing to operate the first cooling fan 21 would cause unnecessary energy consumption and loss. Therefore, the first cooling fan 21 is controlled to shut down synchronously. It can be seen that the embodiment of the present invention can achieve intelligent energy saving and start-stop coordination while ensuring heat dissipation safety, so that the operating status of the two heat dissipation devices 20 is matched and ineffective operation is avoided.

[0042] In an optional embodiment, the method further includes: When the second cooling fan 22 is detected to be in operation, the first cooling fan 21 is controlled to turn on.

[0043] In addition to the method for turning on the first cooling fan 21 provided in step 120, the first cooling fan 21 can also determine whether to turn on based on the operating status of the second cooling fan 22.

[0044] Specifically, the activation of the second cooling fan 22 inside the electrical equipment indicates that the main equipment 10 is in a heat-generating operating condition and has a corresponding heat dissipation requirement. At this time, the first cooling fan 21 is actively activated to form a coordinated internal and external heat dissipation, effectively improving the heat dissipation efficiency and avoiding the phenomenon of untimely heat dissipation caused by a single temperature judgment.

[0045] In an optional embodiment, the method further includes: Monitor the ambient humidity of electrical equipment.

[0046] When the ambient humidity is greater than the preset ambient humidity threshold, the first cooling fan 21 is turned on.

[0047] Alternatively, when the ambient humidity is greater than a preset ambient humidity threshold, the first cooling fan 21 and the second cooling fan 22 can be turned on.

[0048] Considering that electrical equipment is often exposed to outdoor, factory, and humid environments, the ambient humidity fluctuates significantly with weather, season, and environmental moisture levels. Real-time monitoring of the ambient humidity at the location of electrical equipment can effectively identify the adverse effects of external humidity on the equipment's internal structure. When the ambient humidity exceeds a preset threshold, it indicates excessively high external air humidity. A large amount of moisture can easily penetrate the enclosed equipment casing, causing condensation on the inner walls, wiring, and surfaces of core components such as IGBTs. This can lead to safety hazards such as reduced insulation performance, short circuits, corrosion of metal parts, and abnormal equipment operation.

[0049] Therefore, in addition to the method of turning on the first cooling fan 21 provided in step 120, the first cooling fan 21 can also determine whether to turn on based on the ambient humidity.

[0050] When the ambient humidity is greater than the preset ambient humidity threshold, the first cooling fan 21 can be turned on independently. The first cooling fan 21 can form a continuous outward airflow, which on the one hand forms an airflow protection barrier to prevent the continuous influx of high humidity air from the outside into the equipment; on the other hand, it accelerates the air circulation inside the shell, dissipates the accumulated moisture inside, and gradually reduces the humidity of the internal space.

[0051] Alternatively, if the ambient humidity is too high and the risk of internal moisture is high, the first cooling fan 21 and the second cooling fan 22 can be turned on simultaneously. Through the coordinated operation of the internal and external heat dissipation equipment 20, a complete airflow circulation is formed, which greatly improves the internal air replacement efficiency, expels the internal humid gas more quickly, maintains a dry and stable operating environment inside the equipment, effectively avoids problems such as condensation, moisture corrosion, and insulation failure, and comprehensively improves the stability and safety of electrical equipment under humid and complex working conditions.

[0052] In an optional embodiment, the method further includes: The temperature of the main equipment is monitored.

[0053] If the device temperature exceeds the preset device temperature threshold, the second cooling fan 22 will be turned on.

[0054] Considering that the main equipment 10 is the core heat-generating component inside the electrical equipment, its temperature directly reflects the actual internal heat generation and heat dissipation requirements. By monitoring the equipment temperature of the main equipment 10 in real time, it is possible to accurately determine whether there is a risk of overheating in the internal operating conditions. When the equipment temperature of the main equipment 10 exceeds the preset equipment temperature threshold, it indicates that the components are generating excessive heat, and internal heat is continuously accumulating. If heat is not dissipated in time, it can easily lead to performance degradation of the components, accelerated aging, and even problems such as overheating damage and operational failures.

[0055] At this time, the internal second cooling fan 22 is turned on to provide targeted forced cooling for the heat-generating main equipment 10, quickly removing the heat generated by the components, keeping the temperature of the main equipment 10 within a safe operating range, ensuring the stable and reliable operation of the internal components, and extending the overall service life of the equipment.

[0056] In an optional embodiment, the method further includes: Collect the inlet temperature of the air inlet and the outlet temperature of the air outlet.

[0057] If the temperature difference between the air outlet and the air inlet is greater than the preset temperature difference threshold, then the first cooling fan 21 and the second cooling fan 22 will be turned on.

[0058] The second cooling fan 22 operates at a preset minimum speed.

[0059] In this embodiment, when the temperature difference between the air outlet temperature and the air inlet temperature is greater than the preset temperature difference threshold, it indicates that the main equipment 10 is in a state of strong heat generation. The heat generated inside the electrical equipment has accumulated to the point that it cannot be discharged by natural convection or the operation of the second cooling fan 22 alone. It must be discharged by the coordinated operation of the first cooling fan 21 and the second cooling fan 22 in the heat dissipation equipment 20.

[0060] During operation, the first cooling fan 21 operates as the main cooling fan at its normal speed, while the second cooling fan 22 operates as the auxiliary cooling fan at its lowest speed. During this process, the air inlet of the second cooling fan 22 draws in air at a low velocity, promoting slow diffusion of cool air within the cabinet and preventing short-circuiting of the airflow by allowing cool air to flow rapidly along a straight path to the outlet. Hot air inside the electrical equipment rises and accumulates at the top of the cabinet, where the first cooling fan 21 rapidly draws in the hot air and outputs it through the outlet. The two fans work together to ensure a continuous unidirectional cooling airflow within the cabinet, improving heat dissipation efficiency.

[0061] In an optional embodiment, the method further includes: Monitor the ambient humidity of electrical equipment.

[0062] When the electrical equipment is in the start-up state, if the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is greater than the preset ambient temperature threshold, the first cooling fan 21 and the second cooling fan 22 will be turned on.

[0063] When the electrical equipment is in the start-up state, if the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is less than the preset ambient temperature threshold, the first cooling fan 21 is controlled to turn off and the second cooling fan 22 is controlled to turn on.

[0064] When the electrical equipment is in a stopped state, if the ambient humidity is greater than the preset ambient humidity threshold, the first cooling fan 21 is controlled to run in reverse for a preset time.

[0065] In this implementation, if the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is greater than the preset ambient temperature threshold, it indicates that the current environment is a high temperature and high humidity environment. In order to accelerate the discharge of humid air inside the electrical equipment, the first cooling fan 21 and the second cooling fan 22 are turned on at the same time, so that a through cooling air channel is formed inside the electrical equipment to accelerate the discharge of hot and humid air.

[0066] If the ambient humidity is greater than the preset ambient humidity threshold and the ambient temperature is less than the preset ambient temperature threshold, it indicates that the current environment is a low temperature and high humidity environment. In order to prevent external humid air from entering the electrical equipment, the first cooling fan 21 is turned off and the second cooling fan 22 is turned on. Air is drawn in through the air inlet by the second cooling fan 22, increasing the pressure inside the electrical equipment. The inside is in a positive pressure state, which blocks external humid air from entering the electrical equipment.

[0067] When the electrical equipment is in a stopped state, the main equipment 10 does not generate heat. At this time, the second cooling fan 22 is turned off, and the internal temperature of the electrical equipment is close to the ambient temperature. If the ambient humidity is greater than the preset ambient humidity threshold, condensation is likely to form on the top of the electrical equipment. To solve this problem, in this case, the first cooling fan 21 is controlled to reverse its operation, changing from normal outward exhaust to blowing air into the cabinet, disturbing the air inside the cabinet and preventing condensation on the top.

[0068] In an optional embodiment, the method further includes: Fault detection was performed on the first cooling fan 21.

[0069] When the first cooling fan 21 fails and the ambient temperature is higher than the preset ambient temperature threshold, the second cooling fan 22 is turned on.

[0070] When the ambient temperature is not greater than the preset ambient temperature threshold and the equipment temperature is not greater than the preset equipment temperature threshold, the second cooling fan 22 is turned off.

[0071] To ensure the reliable operation of the entire heat dissipation system, this embodiment of the invention adds a fault detection process for the first heat dissipation fan 21 at the outer casing, which can determine in real time whether the first heat dissipation fan 21 is shut down, damaged, or unable to work properly.

[0072] When the first cooling fan 21 is detected to be faulty and unable to operate, and the ambient temperature is higher than the preset threshold, it means that external heat is easily intruded into the equipment and the internal heat dissipation pressure increases. At this time, the internal second cooling fan 22 is started to work, thereby replacing the faulty first cooling fan 21 to complete the internal heat dissipation work, making up for the heat dissipation gap caused by the failure of the external heat dissipation equipment, and avoiding the accumulation of heat inside the equipment and causing overheating failure.

[0073] If the ambient temperature subsequently drops to a safe range, i.e. not exceeding the preset ambient temperature threshold, and the temperature of the main equipment 10 itself is also within the preset safe threshold, i.e. the equipment temperature is not exceeding the preset equipment temperature threshold, then the electrical equipment as a whole has no additional heat dissipation requirement, and the second cooling fan 22 is controlled to shut down in time.

[0074] Through the above control logic, it is possible to reduce unnecessary energy consumption while ensuring the safe operation of equipment, and to achieve both redundancy protection and energy-saving control of the heat dissipation system.

[0075] In an optional embodiment, the method further includes: Fault detection was performed on the second cooling fan 22.

[0076] When the second cooling fan 22 fails and the equipment temperature exceeds the preset equipment temperature threshold, the first cooling fan 21 is controlled to start.

[0077] When the equipment temperature is not greater than the preset equipment temperature threshold and the ambient temperature is not greater than the preset ambient temperature threshold, the first cooling fan 21 is controlled to shut down.

[0078] To further improve the redundancy protection mechanism of the heat dissipation system, this embodiment of the invention adds fault detection for the internal second cooling fan 22, which can determine in real time whether the second cooling fan 22 has malfunctioned or is unable to operate normally for heat dissipation. When a fault is detected in the second cooling fan 22, which cannot dissipate heat for the internal main equipment 10, and the temperature of the main equipment 10 exceeds a preset equipment temperature threshold, it indicates that there is a significant risk of overheating inside. At this time, the first cooling fan 21 on the control shell is turned on to replace the faulty internal heat dissipation device for heat dissipation, accelerate the expulsion of internal heat, make up for the heat dissipation gap caused by the failure of internal heat dissipation, and prevent the main equipment from being damaged due to overheating.

[0079] When the temperature of the main equipment 10 drops to a safe range and the ambient temperature is also within a safe threshold, and there is no overall heat dissipation requirement for the electrical equipment, the first cooling fan 21 is turned off.

[0080] This approach ensures emergency cooling during malfunctions while preventing long-term ineffective operation of the fan, thus balancing equipment safety with energy conservation and consumption reduction.

[0081] In an optional embodiment, the first cooling fan 21 and the second cooling fan 22 are fault detected in the following manner: Obtain the first operating current and the second operating current corresponding to the first cooling fan and the second cooling fan.

[0082] If the first operating current is greater than the preset current threshold, then determine whether the first operating current is within the preset current operating range.

[0083] If not, then the first cooling fan 21 is determined to be faulty.

[0084] Alternatively, if the first operating current is greater than the preset current threshold, the first wind speed of the first cooling fan is collected after the first preset time interval.

[0085] If the first wind speed is less than the preset wind speed, the first cooling fan is determined to be faulty.

[0086] If the second operating current is greater than the preset current threshold, then determine whether the second operating current is within the preset current operating range.

[0087] If not, then the second cooling fan 22 is determined to be faulty.

[0088] Alternatively, if the second operating current is greater than the preset current threshold, the second wind speed of the second cooling fan is collected after the second preset time interval.

[0089] If the second wind speed is less than the preset wind speed, the second cooling fan is determined to be faulty.

[0090] This embodiment provides a specific fault detection method for the cooling fan. By combining the operating current with the wind speed detection, the operating status of the first cooling fan 21 and the second cooling fan 22 can be accurately identified.

[0091] When the heat dissipation equipment is a cooling fan, if it malfunctions, there will be an abnormal current in its corresponding operating circuit. Therefore, the first operating current and the second operating current of the two cooling fans are collected respectively as a preliminary judgment basis.

[0092] When either the first operating current or the second operating current exceeds the preset current threshold, it indicates that the first cooling fan 21 or the second cooling fan 22 has received the start-up command and is starting normally. Subsequent fault detection can then be performed.

[0093] Similarly, if the first operating current or the second operating current collected within the preset monitoring time does not exceed the preset current threshold, it indicates that the first cooling fan 21 or the second cooling fan 22 did not start normally after receiving the start command, or that the first cooling fan 21 or the second cooling fan 22 did not receive the start command. At this time, a fault determination can also be triggered and a fault indication can be issued to facilitate the staff to troubleshoot.

[0094] When either the first operating current or the second operating current exceeds a preset current threshold, a first indication signal and a second indication signal are generated, respectively. The first indication signal and the second indication signal are used to indicate the start-up of the first cooling fan 21 and the second cooling fan 22, respectively, and to indicate fault detection of the first cooling fan and the second cooling fan.

[0095] For the first cooling fan 21, after generating the first indication signal, if the first operating current deviates from the normal range, it is directly determined that the first cooling fan 21 has malfunctioned. The preset current threshold is within a preset current operating range, and it can be the minimum value within that preset current operating range.

[0096] In addition, a wind speed-assisted verification method can also be used. After the first indication signal is generated, the actual airflow speed of the fan is collected again after the first preset time interval. If the measured first wind speed is lower than the preset wind speed standard, it indicates that the fan has problems such as insufficient speed, jamming, or abnormal airflow, and the first cooling fan is also judged to be faulty.

[0097] Similarly, for the second cooling fan, if the second operating current deviates from the normal range after the second indication signal is generated, it is directly determined that the second cooling fan 22 has malfunctioned.

[0098] Alternatively, after generating the second indication signal, at a second preset time interval, the actual wind speed of the second cooling fan is collected. If the second wind speed does not meet the preset wind speed requirement, the second cooling fan 22 is determined to be faulty.

[0099] Therefore, it can be seen that adopting a multi-level fault diagnosis method that combines current and wind speed can avoid misjudgment caused by single parameter detection, improve the accuracy and reliability of fan fault identification, and provide accurate and reliable judgment basis for subsequent redundant switching and emergency control of the heat dissipation system.

[0100] As can be seen, this invention achieves intelligent heat dissipation control through multi-dimensional real-time monitoring of the external ambient temperature and humidity, the internal main equipment temperature, and the operating status of the cooling fans. On the one hand, the first cooling fan 21 forms an airflow barrier, effectively preventing high-temperature and high-humidity air from intruding into the equipment and avoiding damage to internal components due to heat, moisture, or condensation. On the other hand, it matches the start and stop of the second cooling fan 22 according to its operating requirements, avoiding heat dissipation lag, residual heat accumulation, or ineffective equipment operation caused by blindly starting and stopping based solely on ambient temperature, thus balancing heat dissipation effect with energy saving and consumption reduction.

[0101] Meanwhile, the present invention adds a comprehensive fan fault detection mechanism, which combines the operating current and actual wind speed as dual parameters to identify faults, resulting in high detection accuracy and low false judgment rate. When any cooling fan fails, another cooling fan can be started in time for emergency replacement cooling, forming a reliable cooling redundancy protection, effectively avoiding overheating faults caused by cooling failure.

[0102] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0103] This invention also provides a controller, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described in the above method embodiments.

[0104] This invention also provides an electrical device, including a main device 10, a heat dissipation device 20, a housing 30, and a controller as described above. The heat dissipation device 20 is used to dissipate heat from the main device 10. The heat dissipation device 20 includes a first heat dissipation fan 21 and a second heat dissipation fan 22, and a common heat dissipation channel is provided between the first heat dissipation fan 21 and the second heat dissipation fan 22. The air outlet of the first heat dissipation fan 21 and the air inlet of the second heat dissipation fan 22 are respectively provided on the housing 30. The main device 10 is disposed inside the electrical device.

[0105] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not detailed or described in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Unless otherwise specified or in conflict with logic, the terminology and / or descriptions between different embodiments are consistent and can be referenced interchangeably. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0106] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for controlling heat dissipation in electrical equipment, characterized in that, The electrical equipment includes a main body, a heat dissipation device, and a housing. The heat dissipation device is used to dissipate heat from the main body. The heat dissipation device includes a first cooling fan and a second cooling fan, and a common heat dissipation channel is provided between the first cooling fan and the second cooling fan. The air outlet of the first cooling fan and the air inlet of the second cooling fan are respectively located on the housing. The main body is disposed inside the electrical equipment. The method includes: Monitor the ambient temperature of the electrical equipment; When the ambient temperature is greater than a preset ambient temperature threshold, the first cooling fan is turned on. When the first cooling fan is turned on, if the ambient temperature is detected to be no greater than the preset ambient temperature threshold, the operating status of the second cooling fan is obtained. If the second cooling fan is in the "on" state, then the first cooling fan is controlled to remain on.

2. The electrical equipment heat dissipation control method according to claim 1, characterized in that, The method further includes: The inlet temperature of the air inlet and the outlet temperature of the air outlet are collected. If the temperature difference between the air outlet temperature and the air inlet temperature is greater than a preset temperature difference threshold, then the first cooling fan and the second cooling fan are controlled to turn on. The second cooling fan operates at a preset minimum speed.

3. The electrical equipment heat dissipation control method according to claim 1, characterized in that, The method also includes: Monitor the ambient humidity of the electrical equipment; When the electrical equipment is in the start-up state, if the ambient humidity is greater than a preset ambient humidity threshold and the ambient temperature is greater than a preset ambient temperature threshold, then the first cooling fan and the second cooling fan are controlled to turn on. When the electrical equipment is in the start-up state, if the ambient humidity is greater than a preset ambient humidity threshold and the ambient temperature is less than a preset ambient temperature threshold, then the first cooling fan is controlled to turn off and the second cooling fan is controlled to turn on. When the electrical equipment is in a stopped state, if the ambient humidity is greater than a preset ambient humidity threshold, the first cooling fan is controlled to run in reverse for a preset time.

4. The electrical equipment heat dissipation control method according to claim 1, characterized in that, The method further includes: Detect the temperature of the main equipment; If the device temperature is greater than a preset device temperature threshold, then the second cooling fan is turned on.

5. The electrical equipment heat dissipation control method according to claim 4, characterized in that, The method further includes: Perform fault detection on the first cooling fan; When the first cooling fan fails and the ambient temperature is greater than a preset ambient temperature threshold, the second cooling fan is controlled to turn on. When the ambient temperature is not greater than a preset ambient temperature threshold and the device temperature is not greater than a preset device temperature threshold, the second cooling fan is controlled to shut down.

6. The heat dissipation control method for electrical equipment according to claim 5, characterized in that, The method further includes: Perform fault detection on the second cooling fan; When the second cooling fan fails and the equipment temperature exceeds a preset equipment temperature threshold, the first cooling fan is controlled to turn on. When the device temperature is not greater than a preset device temperature threshold and the ambient temperature is not greater than a preset ambient temperature threshold, the first cooling fan is controlled to shut down.

7. The electrical equipment heat dissipation control method according to claim 6, characterized in that, The first and second cooling fans are fault detected in the following ways: Obtain the first operating current and the second operating current corresponding to the first cooling fan and the second cooling fan; If the first operating current is greater than the preset current threshold, then determine whether the first operating current is within the preset current operating range; If not, the first cooling fan is determined to be faulty; Alternatively, if the first operating current is greater than a preset current threshold, the first wind speed of the first cooling fan is collected after a first preset time interval. If the first wind speed is less than the preset wind speed, the first cooling fan is determined to be faulty. If the second operating current is greater than the preset current threshold, then determine whether the second operating current is within the preset current operating range; If not, then the second cooling fan is determined to be faulty; Alternatively, if the second operating current is greater than the preset current threshold, the second wind speed of the second cooling fan is collected after the second preset time interval. If the second wind speed is less than the preset wind speed, the second cooling fan is determined to be faulty.

8. The method for controlling heat dissipation of electrical equipment according to any one of claims 1 to 7, characterized in that, The electrical equipment is a transformer; the first cooling fan is located on the top of the transformer; the second cooling fan is located at the bottom of the transformer.

9. A controller, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1 to 8.

10. An electrical device, characterized in that, The device includes a main unit, a heat dissipation device, a housing, and a controller as described in claim 9, wherein the heat dissipation device is used to dissipate heat from the main unit; the heat dissipation device includes a first heat dissipation fan and a second heat dissipation fan, and a common heat dissipation channel is provided between the first heat dissipation fan and the second heat dissipation fan; the air outlet of the first heat dissipation fan and the air inlet of the second heat dissipation fan are respectively provided on the housing; the main unit is disposed inside the electrical equipment.

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