Electrical cabinet and temperature control system for an electrical cabinet

Abstract

The utility model discloses an electrical cabinet and temperature control system of electrical cabinet relates to electrical equipment technical field, wherein, electrical cabinet includes cabinet body and flow guide subassembly, and the bottom and top of cabinet body are established with first air inlet and air outlet respectively, and the air outlet is provided with the main fan of exhaust to the air outlet of cabinet, flow guide subassembly sets up in the cabinet body, and flow guide subassembly includes main air pipe and air duct, and main air pipe extends along verticality, and the first air duct is formed in main air pipe, and the first air duct is installed with main heating element, and the upper and lower ends of main air pipe are established with the air outlet of the first air duct and the air inlet of the first air duct respectively, and the air inlet is close to first air inlet setting, and the air of cabinet outside can flow into the first air duct through first air inlet and air inlet, and the air duct is connected between air outlet and air outlet. The main fan can exhaust the air in the first air duct outside the cabinet, thereby prompting the air circulation in the first air duct, avoiding the hot air accumulation in the cabinet, and effectively improving the heat dissipation effect of the electrical cabinet.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to an electrical cabinet and a temperature control system for the electrical cabinet. Background Technology

[0002] Electrical cabinets, as key equipment for the centralized installation of electrical components, continuously generate heat during operation. If this heat cannot be dissipated in time, the internal temperature of the cabinet will continue to rise, which can accelerate component aging, affect their performance and lifespan, or even cause equipment failure or safety accidents. Therefore, efficient and reliable heat dissipation is the core element for ensuring the stable operation of electrical cabinets.

[0003] In existing electrical cabinet designs, the main heat-generating components, such as power modules and power drivers, which generate a lot of heat, are usually distributed in multiple vertical layers. The heat dissipation of existing electrical cabinets mainly relies on natural convection or simple fan cooling. This cooling method makes the main heat-generating components on the upper layer susceptible to the rising heat flow generated by the main heat-generating components on the lower layer, and heat accumulation is likely to occur in the upper part of the cabinet, resulting in poor heat dissipation of the electrical cabinet. Utility Model Content

[0004] The main purpose of this utility model is to propose an electrical cabinet and an electrical cabinet temperature control system, which aims to solve the technical problem of poor heat dissipation effect of electrical cabinets in the prior art.

[0005] To achieve the above objectives, the electrical cabinet proposed in this utility model includes a cabinet body and an air guiding component. The bottom and top of the cabinet body are respectively provided with a first air inlet and an air outlet. The air outlet is provided with a main fan that exhausts air to the outside of the cabinet body. The air guiding component is disposed inside the cabinet body and includes a main air duct and a guide duct. The main air duct extends vertically and forms a first air channel inside the main air duct. A main heating element is installed in the first air channel. The upper and lower ends of the main air duct are respectively provided with an air outlet and an air inlet that connect to the first air channel. The air inlet is located close to the first air inlet. Air from outside the cabinet body can flow into the first air channel through the first air inlet and the air inlet. The guide duct connects the air outlet and the air outlet.

[0006] In one embodiment, the main air duct has an auxiliary air inlet located between the air inlet and the air outlet of the main air duct. The side wall of the cabinet has a second air inlet corresponding to the auxiliary air inlet. The second air inlet and the auxiliary air inlet are connected by an auxiliary air duct, and air from outside the cabinet can flow into the first air duct through the second air inlet and the auxiliary air inlet.

[0007] In one embodiment, the main air duct has a plurality of auxiliary air inlets, which are distributed vertically at intervals. The side wall of the cabinet has a plurality of second air inlets at positions corresponding to the plurality of auxiliary air inlets, and each second air inlet and the corresponding auxiliary air inlet are connected through an auxiliary air duct.

[0008] In one embodiment, the auxiliary air inlet is provided with an auxiliary fan that blows air into the first air duct.

[0009] In one embodiment, the bottom end of the air guide duct is positioned around the main air duct near the air outlet, the top end of the air guide duct is positioned around the air outlet, the area of ​​the air outlet is larger than the area of ​​the air outlet, and the air guide duct is gradually expanded from bottom to top.

[0010] In one embodiment, a second air duct is formed between the main air duct and the cabinet. A secondary heating element is installed in the second air duct. Ventilation holes are provided on the wall of the air duct. Air from outside the cabinet can flow into the second air duct through the first air inlet and be discharged from the air outlet through the ventilation holes.

[0011] In one embodiment, the air duct includes multiple sidewalls, which are connected end to end and enclose each other to form the wall of the air duct. Each sidewall is inclined outward from bottom to top, and multiple ventilation holes are spaced apart on each sidewall. The total area of ​​all the ventilation holes on the multiple sidewalls is smaller than the area of ​​the air outlet.

[0012] In one embodiment, the cabinet includes a top plate, a bottom plate, and four side plates. The four side plates are arranged opposite each other in pairs. The bottom of each pair of opposite side plates is provided with the first air inlet, and the top plate is provided with the air outlet.

[0013] In one embodiment, the electrical cabinet is equipped with a plurality of temperature sensors, which are installed vertically at intervals on the wall of the main air duct.

[0014] This utility model proposes a temperature control system for an electrical cabinet, which is applied to the aforementioned electrical cabinet. The electrical cabinet is equipped with multiple temperature sensors, which are installed vertically at intervals within the cabinet. The temperature control system is used to receive the temperature signals from each of the temperature sensors and adjust the heat dissipation airflow within the electrical cabinet.

[0015] The electrical cabinet proposed in this utility model has multiple main heating elements distributed vertically at intervals. A main air duct and a guide duct are installed inside the cabinet. The main air duct surrounds the multiple main heating elements within a first air channel and directs the air entering the cabinet to the heating elements. The upper end of the main air duct connects to the guide duct via an air outlet, and the guide duct connects to the air outlet. A main fan is installed at the air outlet, which exhausts the air from the first air channel outside the cabinet, thereby promoting air circulation within the first air channel, preventing hot air from accumulating inside the cabinet, and thus enhancing the heat dissipation efficiency of the main heating elements inside the electrical cabinet, effectively improving the heat dissipation effect of the electrical cabinet. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the electrical cabinet provided by this utility model; Figure 2 A schematic diagram of the internal structure of an embodiment of the electrical cabinet provided by this utility model from one perspective; Figure 3 A schematic diagram of the internal structure of an embodiment of the electrical cabinet provided by this utility model from another perspective; Figure 4 This is a partial exploded view of an embodiment of the electrical cabinet provided by this utility model.

[0018] Explanation of icon numbers: 10. Cabinet; 11. First air inlet; 12. Air outlet; 13. Main fan; 14. Second air inlet; 15. Top panel; 16. Bottom panel; 17. Side panel; 20. Air guide assembly; 21. Main air duct; 211. First air duct; 212. Air inlet; 213. Air outlet; 214. Auxiliary air inlet; 215. Auxiliary air duct; 216. Auxiliary fan; 22. Air guide duct; 221. Second air duct; 222. Ventilation hole; 30. Fan cover; 31. Exhaust vent; 40. Radiator; 50. Temperature sensor.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] In existing electrical cabinet designs, the main heat-generating components, such as power modules and power drivers, which generate a lot of heat, are usually distributed in multiple vertical layers. The heat dissipation of existing electrical cabinets mainly relies on natural convection or simple fan cooling. This cooling method makes the main heat-generating components on the upper layer susceptible to the rising heat flow generated by the main heat-generating components on the lower layer, resulting in heat accumulation in the upper part of the cabinet and poor heat dissipation effect of the electrical cabinet.

[0024] This utility model proposes an electrical cabinet, including a cabinet body 10 and a flow guiding component 20. The bottom and top of the cabinet body 10 are respectively provided with a first air inlet 11 and an air outlet 12. The air outlet 12 is provided with a main fan 13 that exhausts air to the outside of the cabinet body 10. The flow guiding component 20 is disposed inside the cabinet body 10. The flow guiding component 20 includes a main air duct 21 and a flow guiding duct 22. The main air duct 21 extends vertically and forms a first air channel 211 inside the main air duct 211. A main heating element is installed in the first air channel 211. The upper and lower ends of the main air duct 21 are respectively provided with an air outlet 213 and an air inlet 212 that connect to the first air channel 211. The air inlet 212 is located close to the first air inlet 11. Air from outside the cabinet body 10 can flow into the first air channel 211 through the first air inlet 11 and the air inlet duct 212. The flow guiding duct 22 connects the air outlet 213 and the air outlet 12.

[0025] Please see Figure 1 , Figure 2 and Figure 4 The cabinet 10 has a first air inlet 11 located near the bottom of its side wall, and an air outlet 12 located at the top. A main air duct 21 extends from the bottom of the cabinet 10 to its top, with its lower end not touching the bottom. Air entering the cabinet 10 through the first air inlet 11 flows into the first air duct 211 through the air inlet 212. Guided by the main air duct 21, the air flows from bottom to top through multiple vertically distributed main heating elements within the first air duct 211, exchanging heat with each element. The air then flows through the air outlet 213 into the air guide duct 22, and finally exits the cabinet 10 through the air outlet 12. When the main fan 13 at the air outlet 12 is activated, it draws air out of the cabinet 10 and exhausts it outside, creating a negative pressure inside the cabinet 10. This promotes airflow and facilitates rapid heat dissipation within the cabinet 10.

[0026] The electrical cabinet proposed in this utility model has multiple main heating elements distributed vertically at intervals. A main air duct 21 and a guide duct 22 are installed inside the cabinet body 10. The main air duct 21 surrounds the multiple main heating elements within a first air duct 211 and directs the air entering the cabinet body 10 to the main heating elements. The upper end of the main air duct 21 is connected to the guide duct 22 via an air outlet 213, and the guide duct 22 is connected to an air outlet 12. A main fan 13 is installed at the air outlet 12, which can exhaust the air in the first air duct 211 outside the cabinet body 10, thereby promoting air circulation within the first air duct 211, preventing hot air from accumulating inside the cabinet body 10, thus enhancing the heat dissipation efficiency of the main heating elements inside the electrical cabinet and effectively improving the heat dissipation effect of the electrical cabinet.

[0027] In one embodiment, the main air duct 21 is provided with an auxiliary air inlet 214, which is located between the air inlet 212 and the air outlet 213 of the main air duct 21. The side wall of the cabinet 10 is provided with a second air inlet 14 corresponding to the position of the auxiliary air inlet 214. The second air inlet 14 and the auxiliary air inlet 214 are connected by an auxiliary air duct 215. Air outside the cabinet 10 can flow into the first air duct 211 through the second air inlet 14 and the auxiliary air inlet 214.

[0028] Please see Figure 3 An auxiliary air inlet 214 is provided in the middle of the main air duct 21, and a second air inlet 14 is provided near the middle of the cabinet 10. This allows air from outside the cabinet 10 to enter the cabinet 10 not only through the first air inlet 11, but also directly into the first air duct 211 through the second air inlet 14 and the auxiliary air duct 215. The air from the second air inlet 14 and the air entering the first air duct 211 from the first air inlet 11 converge in the middle of the main air duct 21 and flow together through the main heating element for heat exchange. Because the auxiliary air inlet 214 is located near the middle of the main air duct 21, it can specifically supplement the central area of ​​the main heating element with ambient air from outside the electrical cabinet. This solves the problem of uneven heat dissipation in the middle that may be caused by relying solely on air intake from the bottom of the cabinet 10, making the temperature distribution of the main heating element more uniform along the vertical direction, avoiding local heat accumulation, improving the efficiency of heat exchange of air inside the cabinet 10 and the overall heat dissipation performance of the electrical cabinet.

[0029] In one embodiment, the main air duct 21 has multiple auxiliary air inlets 214, which are distributed vertically at intervals. The side wall of the cabinet 10 has multiple second air inlets 14 at the positions corresponding to the multiple auxiliary air inlets 214, and each second air inlet 14 and the corresponding auxiliary air inlet 214 are connected through an auxiliary air duct 215.

[0030] Please see Figure 3 and Figure 4Multiple main heating elements are installed inside the main air duct 21. When air enters the cabinet 10 from the first air inlet 11 and flows into the first air duct 211 from bottom to top, the air temperature gradually rises as heat is exchanged with the main heating elements, causing the temperature difference between the air and the main heating elements to gradually decrease, and the heat dissipation effect to gradually decrease. By sequentially opening multiple auxiliary air inlets 214 in the middle of the first air duct 211 and supplementing the first air duct 211 with cooler air through multiple auxiliary air ducts 215, the vertical temperature gradient inside the first air duct 211 is broken, allowing the main heating elements installed at different heights inside the first air duct 211 to obtain a more uniform cooling effect. By opening multiple second air inlets 14 on the side wall of the cabinet 10 and multiple corresponding auxiliary air inlets 214 in the middle of the main air duct 21, the effective air intake area of ​​the cabinet 10 is significantly increased, and cooler air can be supplied into the first air duct 211 from different heights, thereby improving the uniformity of the vertical temperature gradient in the first air duct 211 and increasing the heat dissipation efficiency.

[0031] In one embodiment, the auxiliary air inlet 214 is provided with an auxiliary fan 216 that blows air into the first air duct 211.

[0032] Please see Figure 3 The auxiliary fan 216 can blow air from outside the cabinet 10 into the auxiliary air duct 215 and into the first air duct 211 through the auxiliary air inlet 214. This allows the air entering the first air duct 211 through the auxiliary air duct 215 to penetrate the air already present in the first air duct 211, causing the newly entered, cooler air to mix violently with the warmer air in the first air duct 211. This reduces the air temperature at higher positions inside the cabinet 10, ensuring that the mixed air can continue to efficiently dissipate heat from the main heat-generating components at higher positions, further improving the heat dissipation effect of the electrical cabinet.

[0033] In one embodiment, the bottom end of the air duct 22 is surrounded by the main air duct 21 near the air outlet 213, and the top end of the air duct 22 is surrounded by the air outlet 12. The area of ​​the air outlet 12 is larger than the area of ​​the air outlet 213, and the air duct 22 is gradually expanded from bottom to top.

[0034] It should be noted that the bottom end of the air guide duct 22 abuts against the side wall of the main air duct 21, so that the bottom opening of the air guide duct 22 surrounds the air outlet 213, and the top of the air guide duct 22 abuts against the top of the cabinet 10, so that the top opening of the air guide duct 22 surrounds the air outlet 12. Both the main air duct 21 and the air guide duct 22 adopt a multi-plate splicing structure, which can effectively eliminate assembly errors between the air guide duct 22, the main air duct 21, and the cabinet 10. The air guide duct 22 gradually widens from the air outlet 213 to the air outlet 12, allowing the air in the first air duct 211 to flow out of the cabinet 10 more fully, while the air flowing into the air guide duct 22 from the second air duct 221 can mix more smoothly with the air flowing out of the first air duct 211 and be smoothly discharged from the cabinet 10 together.

[0035] In one embodiment, a second air duct 221 is formed between the main air duct 21 and the cabinet 10. A secondary heating element is installed in the second air duct 221. A ventilation hole 222 is opened on the wall of the air duct 22. The area of ​​the ventilation hole 222 is smaller than the area of ​​the air outlet 213. Air outside the cabinet 10 can flow into the second air duct 221 through the first air inlet 11 and be discharged from the air outlet 12 through the ventilation hole 222.

[0036] It can be explained that a first air duct 211 is formed inside the main air duct 21, and a second air duct 221 is formed between the main air duct 21 and the cabinet 10. The main air duct 21 extends from a position near the bottom of the cabinet 10 to the top of the cabinet 10. The lower end of the main air duct 21 does not abut against the bottom of the cabinet 10, so that the first air duct 211 and the second air duct 221 are connected at the bottom of the cabinet 10. Part of the air entering the cabinet 10 from the first air inlet 11 enters the first air duct 211, and the other part enters the second air duct 221. Air in the first air duct 211 flows through the main heating element in the main air duct 211 under the guidance of the main air duct 21, and exchanges heat with the main heating element. Then it flows into the air guide duct 22 through the air outlet 213, and finally flows out of the cabinet 10 through the air outlet 12. Air entering the second air duct 221 exchanges heat with the secondary heating element in the second air duct 221, and then flows into the air guide duct 22 through the ventilation holes 222 opened on the pipe wall of the air guide duct 22, and finally flows out of the cabinet 10 through the air outlet 12.

[0037] In one embodiment, the area of ​​the ventilation hole 222 is smaller than the area of ​​the air outlet 213. Since the air entering the second air duct 221 needs to flow into the air guide duct 22 through the ventilation hole 222, while the air entering the first air duct 211 flows into the air guide duct 22 through the air outlet 213, and the area of ​​the air outlet 213 is larger than the area of ​​the ventilation hole 222, the amount of air entering the air guide duct 22 from the first air duct 211 is greater than the amount of air entering the air guide duct 22 from the second air duct 221. Consequently, more air enters the cabinet 10 through the first air inlet 11, ensuring that the main heating element, which generates more heat, exchanges heat with more air, while the secondary heating element, which generates relatively less heat, exchanges heat with less air, thus achieving a reasonable distribution of air within the cabinet 10.

[0038] In one embodiment, the air duct 22 includes multiple sidewalls, which are connected end to end and enclose the duct wall of the air duct 22. Each sidewall is inclined outward from bottom to top, and multiple ventilation holes 222 are spaced apart on each sidewall. The total area of ​​all ventilation holes 222 on the multiple sidewalls is smaller than the area of ​​the air outlet 213.

[0039] Furthermore, each sidewall is inclined from its bottom end connected to the main air duct 21 to its top end connected to the air outlet 12, moving away from the central axis of the air guide duct 22, so that the air guide duct 22 gradually expands from bottom to top. Each sidewall is set at an angle to the airflow direction in the second air duct 221, and each sidewall can block part of the airflow in the second air duct 221, while the other part of the air can flow out of the second air duct 221 through multiple ventilation holes 222. The total ventilation area of ​​the multiple ventilation holes 222 is smaller than the ventilation area of ​​the air outlet 213, so that the amount of air flowing into the air guide duct 22 from the second air duct 221 is less than the amount of air flowing into the air guide duct 22 from the first air duct 211, thereby achieving a reasonable distribution of airflow within the cabinet 10.

[0040] In one embodiment, the cabinet 10 includes a top plate 15, a bottom plate 16 and four side plates 17. The four side plates 17 are arranged opposite each other in pairs. The bottom of each pair of opposite side plates 17 is provided with a first air inlet 11, and the top plate 15 is provided with an air outlet 12.

[0041] Understandably, the two first air inlets 11 are arranged opposite each other, and the two first air inlets 11 are located on both sides of the cabinet 10. The air outlet 12 is located in the middle of the top plate 15 of the cabinet 10, so that the air entering the cabinet 10 through the two first air inlets 11 can flow fully through the main heating element or secondary heating element in the cabinet 10. The symmetrical arrangement of the two first air inlets 11 enables symmetrical airflow on both sides of the cabinet 10, thereby ensuring that the heating elements in different positions in the cabinet can obtain sufficient and uniform heat dissipation airflow, and improving the uniformity of heat dissipation effect.

[0042] In one embodiment, the heat dissipation structure further includes a fan cover 30, which is connected to the top plate 15 and covers the air outlet 12. An exhaust port 31 is provided on the side of the fan cover 30, and ventilation grilles are provided at both the first air inlet 11 and the exhaust port 31.

[0043] Please see Figure 1 The fan cover 30 is connected to the top plate 15 of the cabinet 10 and completely covers the outside of the air outlet 12. The fan cover 30 completely surrounds the top air outlet 12 and covers the outside of the main fan 13. The air outlet 12 is located on the side of the main fan 13. The airflow in the air duct 22 passes through the air outlet 12 on the side of the main fan 13 and is then discharged to the outside of the cabinet 10 through the exhaust port 31 on the side of the fan cover 30. The top of the fan cover 30 is closed to prevent rainwater from entering the electrical cabinet. The ventilation grille at the exhaust port 31 of the fan cover 30 can prevent foreign objects from falling directly into the top main fan 13 through the exhaust port 31, ensuring the safe operation of the fan. The ventilation grille at the first air inlet 11 can effectively block larger foreign objects from entering the cabinet 10, preventing dust, insects, etc. from contaminating or blocking the internal electrical components and heat dissipation ducts.

[0044] In one embodiment, a radiator 40 for dissipating heat from the main heat-generating component is provided in the first air duct 211. The radiator 40 has multiple spaced fins, and a flow gap is formed between the multiple fins to communicate with the first air duct 211.

[0045] Please see Figure 3 The main heating element is connected to the radiator 40, which transfers the heat generated by the main heating element to the fins. Multiple fins are spaced apart, allowing air in the first air duct 211 to pass through these gaps and exchange heat with the fins, thus carrying away the heat from the fins. The spaced fins effectively increase the contact area between the fins and the air, improving heat exchange efficiency. The spaced arrangement of the multiple fins ensures that airflow can evenly penetrate the cross-section of the radiator 40, preventing heat accumulation in localized areas.

[0046] In one embodiment, a plurality of temperature sensors 50 are arranged inside the electrical cabinet, and the plurality of temperature sensors 50 are installed vertically at intervals inside the cabinet 10.

[0047] It can be explained that each temperature sensor 50 is installed on the main heating element inside the cabinet 10. Multiple temperature sensors 50 are respectively installed on multiple main heating elements distributed vertically at intervals. By collecting the surface temperature of multiple main heating elements through multiple temperature sensors 50, the temperature gradient of the main heating elements at different heights within the electrical cabinet can be obtained, thereby determining the heat dissipation effect of multiple main heating elements. The temperature sensors 50 and their temperature acquisition methods both utilize existing technology and will not be described in detail here.

[0048] This utility model also proposes a temperature control system for an electrical cabinet. The temperature control system is applied to the aforementioned electrical cabinet, and the specific structure of the electrical cabinet is as described in the above embodiments. Since this temperature control system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0049] The electrical cabinet is equipped with multiple temperature sensors 50, which collect the surface temperature of multiple main heat-generating components inside the electrical cabinet. The temperature control system is used to receive the temperature information collected by each temperature sensor 50 and adjust the heat dissipation airflow inside the electrical cabinet.

[0050] It can be explained that the temperature control system can determine the heat dissipation effect inside the electrical cabinet based on the temperature information of the temperature sensor 50, and can control the rotation speed of the main fan 13 to adjust the heat dissipation airflow inside the electrical cabinet. Thus, it dynamically adjusts the airflow speed inside the cabinet 10 according to the heat dissipation effect, realizing the dynamic matching between the heat dissipation airflow and the actual heat load. This not only ensures the reliability of the thermal management of the electrical cabinet under various working conditions, but also optimizes the overall energy efficiency of the temperature control system.

[0051] It can also be noted that when the electrical cabinet is equipped with an auxiliary fan 216, the temperature control system is electrically connected to the auxiliary fan 216 and can control the speed of the auxiliary fan 216.

[0052] It can be further explained that there can be one or more electrical cabinets. When there are multiple electrical cabinets, the multiple temperature sensors 50 and multiple main fans 13 in the multiple electrical cabinets are electrically connected to the temperature control system. The temperature control system can control the speed of the multiple main fans 13. The temperature control system, temperature sensors 50, main fans 13 and their electrical connection methods, as well as the control method of the temperature control system for the main fans 13, all adopt existing technologies and will not be described in detail here.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An electrical cabinet, characterized in that, include: The cabinet has a first air inlet and an air outlet at its bottom and top, respectively, and the air outlet is equipped with a main fan that exhausts air out of the cabinet. An airflow guiding component is disposed within the cabinet. The airflow guiding component includes a main air duct and an air guide duct. The main air duct extends vertically and forms a first air channel within it. A main heating element is installed within the first air channel. An air outlet and an air inlet are respectively provided at the upper and lower ends of the main air duct, connecting to the first air channel. The air inlet is located close to the first air inlet. Air from outside the cabinet can flow into the first air channel through the first air inlet and the air inlet. The air guide duct connects the air outlet and the air outlet.

2. The electrical cabinet as described in claim 1, characterized in that, The main air duct has an auxiliary air inlet located between the air inlet and the air outlet of the main air duct. The side wall of the cabinet has a second air inlet corresponding to the auxiliary air inlet. The second air inlet and the auxiliary air inlet are connected by an auxiliary air duct. Air from outside the cabinet can flow into the first air duct through the second air inlet and the auxiliary air inlet.

3. The electrical cabinet as described in claim 2, characterized in that, The main air duct has multiple auxiliary air inlets, which are distributed vertically at intervals. The side wall of the cabinet has multiple second air inlets corresponding to the positions of the multiple auxiliary air inlets, and each second air inlet and the corresponding auxiliary air inlet are connected through an auxiliary air duct.

4. The electrical cabinet as described in claim 2, characterized in that, The auxiliary air inlet is equipped with an auxiliary fan that blows air into the first air duct.

5. The electrical cabinet as described in claim 1, characterized in that, The bottom end of the air guide duct is positioned around the main air duct near the air outlet, and the top end of the air guide duct is positioned outside the air outlet. The area of ​​the air outlet is larger than the area of ​​the air outlet duct. The air guide duct gradually expands from bottom to top.

6. The electrical cabinet as described in any one of claims 1 to 5, characterized in that, A second air duct is formed between the main air duct and the cabinet. A secondary heating element is installed in the second air duct. Ventilation holes are opened on the wall of the air duct. Air from outside the cabinet can flow into the second air duct through the first air inlet and be discharged from the air outlet through the ventilation holes.

7. The electrical cabinet as described in claim 6, characterized in that, The air duct includes multiple sidewalls, which are connected end to end and enclose the duct wall to form the air duct wall. Each sidewall is inclined outward from bottom to top, and multiple ventilation holes are spaced apart on each sidewall. The total area of ​​all the ventilation holes on the multiple sidewalls is smaller than the area of ​​the air outlet.

8. The electrical cabinet as described in any one of claims 1 to 5, characterized in that, The cabinet includes a top panel, a bottom panel, and four side panels. The four side panels are arranged in pairs facing each other. The bottom of each pair of facing side panels is provided with the first air inlet, and the top panel is provided with the air outlet.

9. The electrical cabinet as described in any one of claims 1 to 5, characterized in that, The electrical cabinet is equipped with multiple temperature sensors, which are installed vertically at intervals on the wall of the main air duct.

10. A temperature control system for an electrical cabinet, characterized in that, An electrical cabinet as described in any one of claims 1 to 8 is provided with a plurality of temperature sensors arranged inside the electrical cabinet, the plurality of temperature sensors being installed vertically at intervals within the cabinet, and the temperature control system being used to receive temperature signals from each of the temperature sensors and adjust the heat dissipation airflow within the electrical cabinet.

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