Circulating heat dissipation type low-voltage electrical cabinet

Abstract

This invention relates to the field of electrical cabinet heat dissipation technology, specifically a circulating heat dissipation low-voltage electrical cabinet, including a cabinet body and a fan structure. A fan structure communicating with the interior of the cabinet is installed on the top of the cabinet body, and a heat collection cylinder is located above the fan structure. An elastic cylinder is connected through the bottom of the heat collection cylinder, and the elastic cylinder is fitted outside the fan structure. A circulation cylinder is located at the bottom of the cabinet body, and a connecting ring is connected through the top of the circulation cylinder. An air inlet pipe communicating with the interior and exterior is located at the bottom of the cabinet body, and the air inlet pipe is fitted outside the connecting ring. This invention collects the hot airflow discharged from the cabinet through the heat collection cylinder at the top of the cabinet body, transports it to an external cooling device via an air supply pipe, and then sends the low-temperature airflow back into the cabinet body through the circulation cylinder at the bottom of the cabinet body, forming a completely closed internal airflow circulation path. This eliminates the need to introduce ambient air, avoiding the problem of external dust and moisture entering the cabinet and contaminating electrical components. Furthermore, the hot airflow is not discharged into the deployment space, ensuring long-term stable heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrical cabinet heat dissipation technology, specifically to a circulating heat dissipation type low-voltage electrical cabinet. Background Technology

[0002] Low-voltage electrical cabinets are core equipment in power transmission and distribution systems used to carry and control low-voltage power distribution components. They are widely used in many fields such as industrial production, building power supply, and municipal infrastructure. The electrical components integrated inside, such as circuit breakers, contactors, and transformers, continuously generate a large amount of heat during operation. If the heat cannot be dissipated in time, the temperature inside the cabinet will continue to rise. This can lead to reduced component operating efficiency and shortened lifespan, or even cause safety accidents such as component overheating and burnout, and power outages. Therefore, an efficient and stable heat dissipation structure is the key to ensuring the long-term reliable operation of low-voltage electrical cabinets.

[0003] Most mainstream low-voltage electrical cabinets currently employ a convection cooling structure for heat dissipation. Typically, an intake fan at the bottom of the cabinet draws in external airflow, while an exhaust fan at the top expels the rising hot air directly to the outside environment. This type of structure presents several problems in practical applications: First, the directly introduced outside air generally carries dust, moisture, and other impurities. These impurities, carried into the cabinet by the airflow, gradually adhere to the surfaces of electrical components, reducing their heat dissipation efficiency and potentially causing insulation degradation, short circuits, and other malfunctions, increasing maintenance costs and safety risks. Second, if the electrical cabinet is deployed in a closed indoor environment, the exhausted hot air cannot dissipate to the outside in time, leading to a continuous rise in indoor temperature. Consequently, the temperature of the incoming air also increases, reducing the overall heat dissipation effect.

[0004] Therefore, the present invention provides a circulating heat dissipation low-voltage electrical cabinet that improves heat dissipation and reduces the entry of impurities. Summary of the Invention

[0005] In response to the problems that existing electrical cabinets mainly rely on internal and external airflow for heat dissipation, which can easily lead to dust and moisture entering the cabinet and causing malfunctions, and that rising external temperatures can affect the heat dissipation effect, a circulating heat dissipation type low-voltage electrical cabinet was designed.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a circulating heat dissipation type low-voltage electrical cabinet, including a cabinet body and a fan structure. The top of the cabinet body is equipped with a fan structure that communicates with the inside of the cabinet body. During normal use, the bottom opening of the cabinet body allows air to enter and carry away the heat generated inside upward. A heat collection cylinder is provided above the fan structure to concentrate the hot airflow generated by heat dissipation into the cylinder. Furthermore, an elastic cylinder is connected through the bottom of the heat collection cylinder. The elastic cylinder is sleeved outside the fan structure to ensure the airflow collection effect and prevent the hot airflow from escaping. The top surface of the heat collection cylinder is connected to the first air supply pipe through the first threaded cylinder. One end of the first air supply pipe is detachably connected to the first threaded cylinder through a threaded ring. The other end of the first air supply pipe is connected to the air inlet of the external cooling device. The fan transports the hot airflow generated by heat dissipation through the air supply pipe to the external cooling device for cooling. The external cooling device is either a condenser or a heat exchanger. The appropriate cooling method can be selected according to environmental requirements, which can effectively cool the hot airflow. Furthermore, the bottom of the cabinet is equipped with a circulation cylinder, the top of which is connected to a docking ring. The bottom of the cabinet is equipped with an air inlet pipe that connects the inside and outside. The air inlet pipe is sleeved on the outside of the docking ring. When the fan is running, it draws airflow from the inside of the circulation cylinder into the inside of the cabinet. The top edge of the circulation cylinder is connected to a third threaded cylinder, and the outside of the third threaded cylinder is connected to a second air supply pipe. The second air supply pipe has the same structure as the first air supply pipe and is connected to the exhaust end of the external cooling device. The cooled airflow is guided by the fan through the circulation cylinder and introduced into the cabinet, so that the cooling airflow can effectively dissipate heat from the internal components of the cabinet, improving the heat dissipation effect. At the same time, the cooling airflow circulates, preventing external dust and moisture from entering the cabinet.

[0007] Furthermore, the two end side walls of the heat collection cylinder are connected to a second threaded cylinder, and the external thread of the second threaded cylinder is connected to a detachable first threaded cap for sealing. For multiple electrical cabinets, the heat collection cylinders of multiple electrical cabinets can be connected to each other by cooperating with common pipelines through the second threaded cylinder, thereby forming a heat exhaust channel.

[0008] Furthermore, the two end side walls of the circulation cylinder are connected to a fourth threaded cylinder, and the external thread of the fourth threaded cylinder is connected to a detachable second threaded cap for sealing. For multiple electrical cabinets, the circulation cylinders at the bottom of multiple electrical cabinets can be connected to each other by the fourth threaded cylinder in conjunction with common pipelines, thereby forming a cooling airflow channel. It can be adapted to different numbers of electrical cabinets and has strong adaptability.

[0009] Furthermore, a fitting gasket is fixedly connected to the bottom of the elastic cylinder, and the fitting gasket fits against the top surface of the cabinet to improve the sealing effect.

[0010] Furthermore, the bottom of the cabinet is provided with an air inlet groove, and the air inlet pipe is located inside the air inlet groove. The bottom of the air inlet pipe is fixedly connected with a sealing gasket of elastic material to prevent external dust and moisture from entering.

[0011] Furthermore, a detachable filter element structure is inserted into the inner side of the docking ring. The filter element structure is a replaceable composite filter element, which includes an activated carbon layer and a filter layer, used to adsorb moisture and particulate pollutants, respectively. The top of the filter element structure is fixedly connected to a handle through the outer shell. The filter element structure is used to adsorb water vapor and filter dust, and can be easily disassembled and replaced.

[0012] Furthermore, multiple sets of sealing rings made of elastic material are axially fixed to the inner wall of the docking ring. The sealing rings are attached to the outside of the filter element structure to improve the airtightness of the connection.

[0013] Furthermore, support frames are symmetrically fixed to the outer walls on both sides of the heat collection cylinder, and the upper end of the support frame is fixed to external facilities by bolts, thereby improving the installation stability of the heat collection cylinder.

[0014] Furthermore, support blocks are symmetrically fixedly connected to the outer walls on both sides of the circulation cylinder to enhance its support strength.

[0015] Furthermore, both the heat collection cylinder and the circulation cylinder are made of metal.

[0016] The beneficial effects of this invention are: 1. This invention collects the hot airflow discharged from the cabinet through a heat collection cylinder at the top of the cabinet, and then transports it to an external cooling device for cooling via an air supply pipe. The low-temperature airflow is then returned to the cabinet through a circulation cylinder at the bottom of the cabinet, forming a completely closed internal airflow circulation path. This eliminates the need to introduce ambient air, avoiding the problem of external dust and moisture entering the cabinet and contaminating electrical components, significantly reducing the probability of component failure and extending the service life of the equipment. Furthermore, the hot airflow will not be discharged into the deployment space, so even in a closed indoor environment, it will not cause an increase in ambient temperature. The heat dissipation efficiency remains stable over a long period of time, effectively alleviating the problem of heat dissipation attenuation during long-term operation.

[0017] 2. The heat collection cylinder, circulation cylinder and air supply pipe of the present invention are all connected by threaded structure to achieve detachable connection. The heat collection cylinder is sleeved on the outside of the fan through an elastic cylinder, and the circulation cylinder is sleeved on the outside of the air inlet pipe through a connecting ring. There is no need to make structural modifications such as opening holes or welding to the cabinet body. It can be adapted simply by lifting the cabinet. 3. The heat collection cylinder and the circulation cylinder of the present invention are both provided with threaded cylinders with detachable threaded caps on their side walls. When multiple electrical cabinets need to be cooled, the heat dissipation components of adjacent electrical cabinets can be connected through common pipelines to connect adjacent hot air collection channels and adjacent cooling air discharge channels, so that multiple electrical cabinets can be circulated and cooled through one cooling device, which has strong adaptability. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cabinet structure of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the three-dimensional structure of the heat collection cylinder of the present invention; Figure 6 This is a cross-sectional view of the heat collection cylinder of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the circulation cylinder of the present invention; Figure 8 This is a cross-sectional view of the circulation cylinder of the present invention.

[0020] In the diagram: 1. Cabinet; 11. Air inlet slot; 12. Air inlet pipe; 13. Sealing gasket; 2. Heat collector cylinder; 21. Elastic cylinder; 211. Fitting gasket; 22. First threaded cylinder; 23. Second threaded cylinder; 24. First threaded cap; 3. First air supply pipe; 31. Threaded ring; 4. Support frame; 5. Circulation cylinder; 51. Third threaded cylinder; 52. Fourth threaded cylinder; 53. Second threaded cap; 54. Connecting ring; 541. Sealing ring; 55. Filter element structure; 551. Outer shell; 552. Handle; 56. Support block; 6. Second air supply pipe; 7. Fan structure. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example: Figures 1-8 As shown, the circulating heat dissipation low-voltage electrical cabinet of the present invention includes a cabinet body 1 and a fan structure 7. The cabinet body 1 is a common electrical cabinet. The top of the cabinet body 1 is equipped with a fan structure 7 that connects to the inside of the cabinet body 1. The rising hot air generated inside the cabinet can be carried away by the operation of the fan. The bottom of the cabinet body 1 is provided with an air inlet slot 11. When the conventional electrical cabinet is in operation, air can be introduced into the interior from the bottom of the cabinet body 1 through the fan structure 7 for cooling. In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a heat collection cylinder 2 is installed above the fan structure 7. Support frames 4, L-shaped plate structures made of metal, are symmetrically fixed to the outer walls of the heat collection cylinder 2. The upper end of the support frame 4 is fixed to external facilities, such as the ceiling or wall hanger of the machine room, via bolts. The lower end of the support frame 4 can be welded or bolted to the heat collection cylinder 2. An elastic cylinder 21, made of high-temperature resistant and anti-aging silicone rubber, is connected through the bottom of the heat collection cylinder 2. The elastic cylinder 21 is fitted onto the outside of the fan structure 7 and has a certain elastic recovery capability, allowing it to be stably installed on the outside of the fan structure 7. The top surface of the heat collection cylinder 2 is connected to the first gas delivery pipe 3 via a first threaded cylinder 22, using a common gas delivery pipeline. The end of the pipe is threadedly connected to the heat collection cylinder 2 and is detachable. A silicone gasket can be placed on the outside of the first threaded cylinder 22 to achieve a seal when the threaded structure is compressed. One end of the first gas delivery pipe 3 is detachably connected to the first threaded cylinder 22 via a threaded ring 31, and the other end of the first gas delivery pipe 3 is connected to the inlet of an external cooling device. The air end connection is used to transport hot air to the cooling equipment for cooling. The cooling equipment is either a condenser or a heat exchanger, and the appropriate cooling method can be selected according to environmental requirements. The bottom of the cabinet 1 is equipped with a circulation cylinder 5. Support blocks 56 are symmetrically fixed to the outer walls of both sides of the circulation cylinder 5 to enhance the structural strength of the circulation cylinder 5 and make it stably support the electrical cabinet. Both the heat collection cylinder 2 and the circulation cylinder 5 are made of metal. The top of the circulation cylinder 5 is connected to the docking ring 54. The bottom of the cabinet 1 is equipped with an air inlet pipe 12 that connects the inside and outside. The air inlet pipe 12 is sleeved on the outside of the docking ring 54, which can introduce the gas inside the circulation cylinder 5 into the inside of the cabinet 1. The top edge of the circulation cylinder 5 is connected to a third threaded cylinder 51. The outside of the third threaded cylinder 51 is connected to a second air supply pipe 6. The second air supply pipe 6 has the same structure as the first air supply pipe 3 and is connected to the circulation cylinder 5 in the same threaded and detachable manner. The second air supply pipe 6 is connected to the exhaust end of the external cooling equipment to introduce the cooled air into the inside of the cabinet 1. Specifically, using the aforementioned technical means, a heat collection cylinder 2 is installed on the top of the electrical cabinet to guide the hot airflow out, and a circulation cylinder 5 is installed at the bottom of the electrical cabinet to guide the cooling airflow in. The heat collection cylinder 2 and the circulation cylinder 5 are connected to the air inlet and exhaust end of the external cooling equipment through air supply pipelines, respectively. The cooling equipment cools the airflow that has heated up after flowing through the electrical cabinet, and then the cooled airflow is introduced into the electrical cabinet for further cooling. This circulating heat dissipation avoids the airflow coming into contact with the outside air, which could bring dust and moisture into the electrical cabinet. At the same time, the cooling equipment improves the heat dissipation effect.

[0023] Furthermore, refer to Figure 4 , Figure 5 and Figure 6As shown, a fitting washer 211 is fixedly connected to the bottom of the elastic cylinder 21. The fitting washer 211 fits against the top surface of the cabinet 1. The fitting washer 211 is made of elastic rubber and can stably fit against the electrical cabinet under the elastic support of the elastic cylinder 21. The air inlet pipe 12 is located inside the air inlet groove 11. A sealing washer 13 of elastic material is fixedly connected to the bottom of the air inlet pipe 12. After the electrical cabinet is installed on the top surface of the circulation cylinder 5, the air inlet pipe 12 is sleeved on the outside of the docking ring 54. At the same time, the elastic sealing washer 13 fits against the circulation cylinder 5, which improves the air tightness of the connection, prevents external dust and moisture from entering, and improves the stability of airflow circulation. In this embodiment, refer to Figure 4 , Figure 7 and Figure 8 As shown, a detachable filter element structure 55 is inserted into the inner side of the docking ring 54. The filter element is a replaceable composite filter element, which includes an activated carbon layer and a filter layer, used to adsorb moisture and particulate pollutants, respectively. The top of the filter element structure 55 is fixedly connected to the handle 552 through the outer shell 551, which can easily insert and remove the filter element. The filter element structure 55 is used to filter water vapor and dust. Multiple sets of elastic sealing rings 541 are axially fixed to the inner wall of the docking ring 54. The sealing rings 541 fit against the outer side of the filter element structure 55 to improve the airtightness of the connection. Specifically, through the above-mentioned technical means, the airflow is filtered through the filter structure 55 before entering the electrical cabinet, and the dust and moisture in the airflow are adsorbed. In addition, when the electrical cabinet is opened later, the filter structure 55 can be observed through the air inlet pipe 12 from the cabinet body 1. The filter structure 55 can be easily plugged in and replaced through the air inlet pipe 12.

[0024] In this embodiment, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the two ends of the heat collection cylinder 2 are connected to the second threaded cylinder 23 through the side walls, and the external thread of the second threaded cylinder 23 is connected to the detachable first threaded cap 24 for sealing; the two ends of the circulation cylinder 5 are connected to the fourth threaded cylinder 52 through the side walls, and the external thread of the fourth threaded cylinder 52 is connected to the detachable second threaded cap 53 for sealing. Specifically, through the above technical solution, threaded cylinders are set on both sides of the heat collection cylinder 2 and on both sides of the circulation cylinder 5. This allows the heat collection cylinders 2 above adjacent electrical cabinets to be connected together through connecting pipes (such as pipes with the same structure as the first air supply pipe 3 and the second air supply pipe 6) to form a centralized heat exhaust channel, and the circulation cylinders 5 at the bottom of adjacent electrical cabinets to be connected together to form a centralized air intake channel. In addition, to enhance airflow, fans can be added to the air inlet and exhaust port of the external cooling facility. Some cooling equipment has its own fans, which can smoothly guide the airflow and avoid the accumulation of hot air inside the heat collection cylinder 2. After multiple cabinets are connected in parallel, multiple electrical cabinets can be cooled simultaneously through one or a few cooling devices, improving the adaptability of the circulating cooling device.

[0025] The working principle and usage process of this invention: First, the circulation cylinder 5 is fixed to the ground with bolts. Then, the electrical cabinet is placed on top of the circulation cylinder 5, with the bottom air inlet pipe 12 of the electrical cabinet fitted onto the outside of the top docking ring 54 of the circulation cylinder 5 (the filter element structure 55 is pre-inserted into the inside of the docking ring 54). Next, the heat collection cylinder 2 is fixed to the external facilities via the support frame 4, positioning it above the electrical cabinet. The bottom elastic cylinder 21 of the heat collection cylinder 2 covers the outside of the top fan structure 7 of the electrical cabinet. Then, the operator connects the heat collection cylinder 2 to the air inlet of the external cooling equipment using the first air supply pipe 3. The second air supply pipe 6 connects the circulation cylinder 5 to the exhaust port of the external cooling equipment. When the electrical cabinet is running, the cooling equipment is started simultaneously, so that the electrical cabinet can exhaust the heat generated by the operation of the electrical components upward through the fan component. The exhaust hot air flows through the pipeline to the cooling equipment for cooling, and then is discharged into the interior of the circulation cylinder 5 through the exhaust port of the cooling equipment and the pipeline. The fan component then draws the cooled air upward from the bottom of the electrical cabinet, so that the cooled air flows through the components inside the electrical cabinet for cooling. This circulating cooling avoids the airflow carrying dust and moisture, resulting in a good cooling effect.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circulating heat dissipation type low-voltage electrical cabinet comprising a cabinet body (1) and a fan structure (7), characterized in that: The top of the cabinet (1) is equipped with a fan structure (7) that connects to the inside of the cabinet (1), and a heat collection cylinder (2) is provided above the fan structure (7). The bottom of the heat collection cylinder (2) is connected to an elastic cylinder (21), which is sleeved on the outside of the fan structure (7). The top surface of the heat collection cylinder (2) is connected to the first gas delivery pipe (3) through the first threaded cylinder (22). One end of the first gas delivery pipe (3) is detachably connected to the first threaded cylinder (22) through a threaded ring (31), and the other end of the first gas delivery pipe (3) is connected to the air inlet of the external cooling device to deliver hot air to the cooling device for cooling. The bottom of the cabinet (1) is provided with a circulation cylinder (5), and the top of the circulation cylinder (5) is connected to a docking ring (54). The bottom of the cabinet (1) is provided with an air inlet pipe (12) that connects the inside and outside. The air inlet pipe (12) is sleeved on the outside of the docking ring (54). The top edge of the circulation cylinder (5) is connected to a third threaded cylinder (51). The outside of the third threaded cylinder (51) is connected to a second air supply pipe (6). The second air supply pipe (6) has the same structure as the first air supply pipe (3). The second air supply pipe (6) is connected to the exhaust end of the external cooling device and introduces the cooled airflow into the cabinet (1).

2. The circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: The heat collection cylinder (2) has a second threaded cylinder (23) that is connected through to both ends of the side wall. The external thread of the second threaded cylinder (23) is connected to a detachable first threaded cap (24) for sealing.

3. The circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: The two end side walls of the circulating cylinder (5) are connected to a fourth threaded cylinder (52), and the external thread of the fourth threaded cylinder (52) is connected to a detachable second threaded cap (53) for sealing.

4. The circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: The bottom of the elastic cylinder (21) is fixedly connected to a fitting washer (211), which fits the top surface of the cabinet (1).

5. A circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: The bottom of the cabinet (1) is provided with an air inlet groove (11), and the air inlet pipe (12) is located inside the air inlet groove (11). The bottom of the air inlet pipe (12) is fixedly connected to a sealing gasket (13) made of elastic material.

6. A circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: The inner side of the docking ring (54) is fitted with a detachable filter element structure (55). The top of the filter element structure (55) is fixedly connected to the handle (552) through the outer shell (551). The filter element structure (55) is used to adsorb water vapor and filter dust.

7. The circulating heat dissipation type low-voltage electrical cabinet according to claim 6, characterized in that: The inner wall of the docking ring (54) is axially fixedly connected with multiple sets of elastic material sealing rings (541), and the sealing rings (541) are attached to the outside of the filter element structure (55).

8. The circulating heat radiation type low voltage electrical cabinet according to claim 1, characterized in that: The outer walls of the heat collection cylinder (2) are symmetrically fixed with support frames (4), and the upper end of the support frame (4) is fixed to the external facilities by bolt structure.

9. The circulating heat radiation type low voltage electrical cabinet according to claim 1, characterized in that: Support blocks (56) are symmetrically fixed to the outer walls on both sides of the circulating cylinder (5).

10. The circulating heat dissipation type low-voltage electrical cabinet according to claim 1, characterized in that: Both the heat collection cylinder (2) and the circulation cylinder (5) are made of metal.

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