A heat dissipation structure for a high-voltage soft starter

Abstract

The utility model relates to a kind of heat dissipation structure for high-voltage soft starting device, the high-voltage soft starting device includes cabinet, transformer room is equipped in cabinet;The heat dissipation structure includes heat dissipation passage, is installed in the outside of transformer room, the bottom air inlet of heat dissipation passage is connected with transformer room, and the top air outlet is equipped with heat dissipation fan.This application constructs the directional efficient hot air discharge path by bottom air inlet, top air outlet heat dissipation passage, and the heat of transformer room is forcedly extracted through air outlet by heat dissipation fan suction design, solves the problem that heat is easily retained in transformer room in traditional heat dissipation mode;Heat dissipation passage is installed in the outside of transformer room, neither occupies transformer room internal space, and can be forcedly extracted by fan, significantly improve heat dissipation efficiency, quickly reduce the temperature when transformer operates, avoid the electrical components caused by high temperature to reduce capacity, insulation material aging and sensitivity decline, guarantee high-voltage soft starting device stable operation.

Description

Technical Field

[0001] This utility model relates to the field of soft starter technology, specifically to a heat dissipation structure for a high-voltage soft starter. Background Technology

[0002] High-voltage soft starters are medium- and high-voltage motor control devices based on high-voltage liquid resistance soft starting, magnetic saturation reactor (magnetically controlled) starters, and thyristor series technology. With technological advancements, the application of high-voltage soft starters has become increasingly widespread; however, during long-term use, a prominent problem has been discovered: the motor requires a transformer for voltage transformation and starting, and the transformer generates a large amount of heat during operation, which accumulates and causes the temperature to rise. This high-temperature environment not only causes derating of other electrical components, reducing the actual output capacity of the equipment, but also accelerates the aging of insulation materials, shortening the equipment's lifespan. Furthermore, it affects the sensitivity of various components, posing a threat to the stable operation of the equipment.

[0003] In the past, natural cooling or simple direct fan blowing was often used to address the heat dissipation problem of transformers. Natural cooling relies on natural air convection, which has extremely low heat dissipation efficiency and is difficult to meet the heat dissipation requirements under high load operation. Although simple direct fan blowing can enhance the heat dissipation effect to a certain extent, the airflow direction is chaotic and cannot form a directional and efficient heat dissipation path, and some heat will still remain in the compartment.

[0004] Therefore, there is an urgent need to develop a heat dissipation structure suitable for high-voltage soft starters. Utility Model Content

[0005] This utility model addresses the technical problems existing in the prior art by providing a heat dissipation structure for a high-voltage soft starter.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A heat dissipation structure for a high-voltage soft starter, the high-voltage soft starter including a cabinet, the cabinet containing a transformer chamber; the heat dissipation structure including a heat dissipation channel installed outside the transformer chamber, the bottom air inlet of the heat dissipation channel being connected to the transformer chamber, and a heat dissipation fan being provided at the top air outlet.

[0007] The beneficial effects of this utility model are: A directional and efficient hot air exhaust path is constructed through the bottom air intake and top air exhaust heat dissipation channel. The heat dissipation fan exhaust design forces the heat in the transformer room to be extracted through the air outlet, solving the problem of heat retention in the transformer room in traditional heat dissipation methods. The heat dissipation channel is installed on the outside of the transformer room, which does not occupy the internal space of the transformer room, and can significantly improve the heat dissipation efficiency through forced exhaust by the fan. It can quickly reduce the temperature of the transformer during operation, avoid the derating of electrical components, aging of insulation materials and decrease in sensitivity caused by high temperature, and ensure the stable operation of the high-voltage soft starter.

[0008] Furthermore, the cabinet interior is divided into multiple sealed chambers by partitions, including a transformer chamber, a capacitor chamber, and a cable chamber. These partitions physically isolate the cabinet, preventing heat generated during transformer operation from spreading to the capacitor and cable chambers, and protecting components in other chambers from high temperatures.

[0009] Furthermore, the transformer room sidewall is equipped with louvers, through which outside air can be blown into the transformer room. The louvers provide a stable inlet of cold air for the transformer room, forming an air circulation of intake and exhaust with the exhaust function of the heat dissipation channel, continuously replenishing the cool source for the transformer room and enhancing the heat dissipation effect.

[0010] Furthermore, a dustproof net is detachably installed on the inner side of the louvers via a mounting frame. The dustproof net can further filter fine impurities such as dust and lint in the air, preventing them from entering the transformer chamber and adhering to the surface of the transformer and other components, thus preventing dust accumulation from affecting heat dissipation efficiency or causing electrical short circuits.

[0011] Furthermore, an air filter is installed on the inner side of the dustproof net via a mounting plate. Adding an air filter to the dustproof net allows for deep purification of the air entering the transformer room, effectively filtering out fine particulate matter, making it suitable for industrial environments with high dust levels and poor air quality.

[0012] Furthermore, an air intake fan is installed on the inner side of the dustproof net via an mounting plate. The air intake fan actively draws external cold air into the transformer chamber, forming a strong convective circulation of active air intake and forced exhaust with the cooling fan at the top of the heat dissipation channel. Compared with natural air intake, this can significantly improve the air circulation speed and air volume, quickly removing the heat generated by the transformer.

[0013] Furthermore, a temperature sensor is installed inside the transformer room. This sensor can monitor temperature changes in the transformer room in real time, providing data for intelligent control of the cooling system and solving the energy waste problem caused by the continuous full-load operation of traditional cooling fans.

[0014] Furthermore, the heat dissipation channel has a hollow L-shaped plate structure. The hollow structure ensures unobstructed flow of hot air from the transformer compartment to the air outlet; the L-shaped plate design can flexibly adapt to the installation space of the cabinet and surrounding equipment, avoid other components of the cabinet, reduce installation interference, and improve space utilization.

[0015] Furthermore, the air inlet of the heat dissipation channel is provided with a mounting part. The mounting part provides a precise and stable assembly structure for the connection between the heat dissipation channel and the transformer room, avoiding gaps at the connection between the air inlet and the transformer room due to installation deviations, preventing hot air leakage and affecting the heat dissipation effect.

[0016] Furthermore, the cooling fans include multiple main cooling fans and multiple backup cooling fans. This redundant configuration solves the reliability problem of cooling interruption in traditional single-fan cooling systems when a fan fails. Attached Figure Description

[0017] Figure 1 , Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 3 , Figure 4 This is a schematic diagram of the heat dissipation channel structure according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the internal structure of the transformer room according to an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Transformer room; 2. Capacitor room; 3. Cable room; 4. Heat dissipation channel; 41. Installation section; 5. Heat dissipation fan; 6. Louver; 7. Dustproof net; 8. Air filter; 9. Air intake fan. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0021] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0022] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0023] Please see Figures 1 to 5 .

[0024] Example 1 This embodiment provides a heat dissipation structure for a high-voltage soft starter, wherein: The high-voltage soft starter includes a cabinet, the interior of which is divided into multiple sealed chambers by partitions, including but not limited to a transformer chamber 1, a capacitor chamber 2, and a cable chamber 3. The partitions physically isolate the cabinet from the other chambers, preventing heat generated by the transformer from spreading to the capacitor chamber 2 and cable chamber 3, and preventing components in other chambers from being affected by high temperatures. Simultaneously, the sealed structure reduces cross-contamination of dust and moisture between chambers, lowers the risk of malfunctions caused by interference between different components, extends the service life of components in each chamber, and improves the overall operational stability of the device.

[0025] The heat dissipation structure includes a heat dissipation channel 4, installed on the outside of the transformer chamber 1. The bottom air inlet of the heat dissipation channel 4 is connected to the transformer chamber 1, and a cooling fan 5 is installed at the top air outlet. The purpose is to create a directional and efficient hot air exhaust path through the bottom-intake and top-exhaust heat dissipation channel 4, and to forcibly extract heat from the transformer chamber 1 through the air outlet using the exhaust fan 5, thus solving the problem of heat retention in the transformer chamber 1 in traditional heat dissipation methods. Specifically: The heat dissipation channel 4 has a hollow L-shaped plate structure. The hollow structure ensures unobstructed flow of hot air from the transformer compartment 1 to the air outlet; the L-shaped plate design can flexibly adapt to the installation space of the cabinet and surrounding equipment, avoiding other components of the cabinet (such as the terminals of the capacitor compartment and cable compartment), reducing installation interference and improving space utilization; at the same time, the plate structure can increase the contact area between the heat dissipation channel 4 and the outside air, assisting in heat dissipation (transferring some heat to the outside through thermal conduction), and further improving heat dissipation efficiency.

[0026] The air inlet of the heat dissipation channel 4 is provided with a mounting part 41 (which can be an integral or separate mounting plate, and can be fixedly connected to the side wall of the transformer room 1 by means of bolts, etc.). The mounting part 41 provides a precise and stable assembly structure for the connection between the heat dissipation channel 4 and the transformer room 1, avoiding gaps at the connection between the air inlet and the transformer room 1 due to installation deviations (preventing hot air leakage and affecting the heat dissipation effect); at the same time, the standardized mounting part facilitates the quick assembly and disassembly of the heat dissipation channel 4, reduces the difficulty of operation during later maintenance (such as cleaning the dust inside the channel and replacing the fan), and improves assembly and maintenance efficiency.

[0027] The cooling fan 5 includes multiple main cooling fans and multiple backup cooling fans. This redundant configuration of main and backup fans solves the reliability problem of "cooling interruption due to fan failure" in traditional single-fan cooling systems. When a main cooling fan stops operating due to a fault, a backup fan can be started to ensure continuous airflow through the cooling channel, preventing a sudden rise in transformer room temperature. The multiple fan design also allows for adjustment of the number of operating fans based on temperature changes (combined with temperature sensor data), balancing strong cooling under high loads with energy saving under low loads, improving the stability and fault tolerance of the cooling system, and adapting to the high reliability requirements of high-voltage soft-start devices (especially when driving important motor loads).

[0028] Example 2 It is basically the same as Example 1, except that: The transformer room 1 has louvers 6 installed on its side wall via a mounting frame, allowing outside air to be blown into it. The louvers 6 provide a stable inlet of cold air to the transformer room 1, forming an intake-exhaust air circulation with the exhaust function of the heat dissipation channel 4, continuously replenishing the cooling source and enhancing heat dissipation. Simultaneously, the structural design of the louvers 6 can block large particles such as rainwater and fallen leaves from entering while introducing cold air, balancing ventilation and basic protection, and solving the problem of traditional open-type air intakes being easily affected by external environmental interference.

[0029] Example 3 It is basically the same as Example 2, except that: A dustproof net 7 is detachably installed on the inner side of the louver 6 via a mounting frame. The dustproof net 7 can further filter fine impurities such as dust and lint in the air, preventing them from entering the transformer chamber 1 and adhering to the surface of the transformer and other components. This prevents dust accumulation from affecting heat dissipation efficiency or causing electrical short circuits. At the same time, the detachable installation design facilitates regular disassembly, cleaning, or replacement of the dustproof net 7, reducing maintenance difficulty. Maintenance of the protective components can be completed without disassembling the cabinet, ensuring long-term dustproof effect and extending the maintenance cycle of the device.

[0030] Example 4 It is basically the same as Example 3, except that: An air filter 8 is installed on the inner side of the dustproof net 7 via an mounting plate. If necessary, an air filter 8 can be added to the dustproof net 7 to deeply purify the air entering the transformer room 1, effectively filtering out fine particulate matter (such as dust, pollen, smoke particles, etc.), which is suitable for industrial scenarios with high dust and poor air quality. Through dual filtration (dustproof net 7 - air filter 8), the cleanliness of the air entering the transformer room 1 is greatly improved, protecting the transformer and precision components (such as relays and circuit boards) from the corrosion of impurities, further reducing the failure rate, and adapting to occasions with high cleanliness operation requirements.

[0031] Example 5 It is basically the same as Example 4, except that: An air intake fan 9 is installed inside the dustproof net 7 via a mounting plate. The air intake fan 9 actively draws in external cold air into the transformer chamber 1, forming a strong convective circulation of active air intake and forced exhaust with the cooling fan 5 at the top of the heat dissipation channel 4. Compared with natural air intake (relying solely on the louvers 6), this significantly increases the air circulation speed and air volume, quickly removing the heat generated by the transformer. It is especially suitable for the heat dissipation needs of transformers operating under high loads (such as during the reduced-voltage starting stage of a motor). At the same time, the air intake fan 9 is installed inside the dustproof net 7, which can prevent the fan from being directly contaminated by external impurities and extend the service life of the fan.

[0032] Example 6 It is basically the same as Example 5, except that: A temperature sensor (an existing temperature sensor can be used) is installed inside the transformer room 1. The temperature sensor can be electrically connected to the controller (such as a PLC) of the high-voltage soft starter control system via a line. The temperature sensor can monitor the temperature change of the transformer room 1 in real time and transmit the temperature information to the controller. The controller can be electrically connected to the control terminal of the cooling fan 5 via a line to control the number of cooling fans 5 started, the start time, and the speed.

[0033] When the motor starts through the transformer, the transformer generates a large amount of heat. When the temperature of the transformer chamber 1 is higher than the preset threshold, all cooling fans 5 are immediately started. Air enters through the air inlet of the heat dissipation channel 4, and is forced out through the heat dissipation channel 4 by the cooling fans 5. The cold air enters the chamber through the louvers 6 on the side wall of the transformer, forming a circulation. When the motor starts and runs, the heat generated is relatively small. When the temperature is lower than the preset value, the number of cooling fans 5 can be reduced or the speed can be reduced.

[0034] The temperature sensor enables on-demand heat dissipation, solving the energy waste problem caused by the continuous full-load operation of traditional cooling fans. It ensures heat dissipation effect while reducing energy consumption. At the same time, real-time temperature monitoring can detect temperature anomalies (such as local overheating) in a timely manner, provide early warning of fault risks, and provide data basis for intelligent control of the heat dissipation system.

[0035] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A heat dissipation structure for a high-voltage soft starter, characterized in that, The high-voltage soft starter includes a cabinet, inside which is a transformer chamber; the heat dissipation structure includes a heat dissipation channel installed outside the transformer chamber, with the bottom air inlet of the heat dissipation channel connected to the transformer chamber and the top air outlet equipped with a heat dissipation fan.

2. The heat dissipation structure for a high-voltage soft starter according to claim 1, characterized in that, The cabinet is divided into multiple sealed chambers by partitions, including a transformer chamber, a capacitor chamber, and a cable chamber.

3. A heat dissipation structure for a high-voltage soft starter according to claim 1 or 2, characterized in that, The transformer room is equipped with louvers on its side wall, through which outside air can be blown into the transformer room.

4. The heat dissipation structure for a high-voltage soft starter according to claim 3, characterized in that, A dustproof net is detachably installed on the inner side of the louvers via a mounting frame.

5. The heat dissipation structure for a high-voltage soft starter according to claim 4, characterized in that, An air filter is installed on the inner side of the dustproof net via an mounting plate.

6. The heat dissipation structure for a high-voltage soft starter according to claim 4, characterized in that, An air intake fan is installed on the inner side of the dustproof net via an mounting plate.

7. The heat dissipation structure for a high-voltage soft starter according to claim 1, characterized in that, A temperature sensor is installed inside the transformer room.

8. The heat dissipation structure for a high-voltage soft starter according to claim 1, characterized in that, The heat dissipation channel has a hollow L-shaped plate structure.

9. The heat dissipation structure for a high-voltage soft starter according to claim 1, characterized in that, The air inlet of the heat dissipation channel is equipped with an installation part.

10. A heat dissipation structure for a high-voltage soft starter according to claim 1, characterized in that, The cooling fans include multiple main cooling fans and multiple backup cooling fans.

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