A nuclear power plant power supply equipment cabinet heat dissipation structure and cabinet

Abstract

The application provides a nuclear power station power supply equipment cabinet heat dissipation structure and cabinet, belongs to instrument parts technical field, including cabinet body and respectively setting in the cabinet body's partition structure and heat dissipation air duct;The heat dissipation air duct is equipped with radiator;The partition structure and heat dissipation air duct divide the cabinet inner chamber into first chamber and second chamber;The first chamber includes accommodating cavity and ventilation cavity;Accommodating cavity is used to place the first module;Second chamber is used to place second module, and second module is set with the radiator.This nuclear power station power supply equipment cabinet heat dissipation structure provided by the application can ensure uniform heat dissipation for the first module and the second module, avoid local hot spot problem and improve the heat dissipation effect of the cabinet body.

Description

Technical Field

[0001] This invention belongs to the field of instrument component technology, and more specifically, relates to a heat dissipation structure for a power supply equipment cabinet used in nuclear power plants. Background Technology

[0002] Nuclear power plants are typically equipped with power equipment cabinets. Considering the need for multiple cabinets to be paralleled and the requirement for cabinets to be placed against walls, these cabinets generally employ a bottom-in, top-out ventilation system to dissipate heat from the internal electrical components. Because different electrical components are distributed within the cabinet, those located at the top receive hot air passing through the components below, resulting in poor overall heat dissipation and the creation of localized hot spots. Summary of the Invention

[0003] The purpose of this invention is to provide a heat dissipation structure and cabinet for power equipment cabinets used in nuclear power plants, aiming to solve the technical problem of poor heat dissipation effect of cabinets using the bottom air intake and top air exhaust ventilation method in the prior art.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a heat dissipation structure for a power equipment cabinet in a nuclear power plant, comprising a cabinet body, and a partition structure and a heat dissipation duct respectively disposed in the cabinet body and connected sequentially from bottom to top; the heat dissipation duct is provided with a radiator.

[0005] The partition structure and the heat dissipation duct divide the inner cavity of the cabinet into a first chamber and a second chamber; the first chamber includes a accommodating cavity and a ventilation cavity that are connected vertically; the accommodating cavity is used to place a first module; the second chamber is located above the accommodating cavity and in front of the ventilation cavity, and the second chamber is used to place a second module, which is fitted to the heat sink.

[0006] The cabinet has a first air inlet on its bottom plate and / or side plate, and a second air inlet on its side plate; the cabinet has an air outlet on its top plate; and a second ventilation opening is provided on the heat dissipation duct below the radiator; wherein the first air inlet, the first chamber, and the air outlet are connected in sequence; and the second air inlet, the second ventilation opening, the heat dissipation duct, and the air outlet are connected in sequence.

[0007] As a limitation of the present invention, the partition structure forms an air inlet channel, the front end of the air inlet channel is connected to the second air inlet, and the rear end of the air inlet channel faces the second ventilation opening.

[0008] Furthermore, the partition structure includes:

[0009] The baffle is located at the front end directly behind the second air inlet and at the rear end below the second vent.

[0010] The air deflector includes a lateral extension and a vertical extension connected in sequence; the front end of the lateral extension is located directly behind the second air inlet and directly below the baffle, the vertical extension is located behind the baffle, and the upper end of the vertical extension is connected to the second vent; wherein, the air inlet channel is formed between the baffle and the lateral extension.

[0011] Furthermore, the second chamber is also used to house a third module, which is electrically connected to the second module; the third module is placed on the baffle.

[0012] As a limitation of the present invention, the heat dissipation duct includes a first duct and a second duct connected sequentially from bottom to top; the radiator is located in the first duct, and the internal cavity structure of the first duct is adapted to the structure of the radiator; the lower end of the first duct forms the second ventilation opening.

[0013] Furthermore, the second air duct includes an inlet and a flared section connected sequentially from bottom to top; the internal cavity structure of the inlet is the same as that of the first air duct; the flared section expands outward from bottom to top.

[0014] As a limitation of the present invention, the top end of the heat dissipation duct is horizontally sealed off from the inner cavity of the cabinet; the heat dissipation duct is also provided with a first ventilation opening communicating with the first chamber and a third ventilation opening communicating with the second chamber.

[0015] Furthermore, the first ventilation opening and the third ventilation opening correspond to each other along the front and rear direction of the cabinet; a copper busbar is provided in the heat dissipation duct between the first ventilation opening and the third ventilation opening.

[0016] The beneficial effects of the heat dissipation structure for power equipment cabinets in nuclear power plants provided by this invention are as follows: Compared with the prior art, the heat dissipation structure for power equipment cabinets in nuclear power plants of this invention uses a partition structure and a heat dissipation duct to divide the cabinet cavity into a first chamber and a second chamber that are not interconnected. Some cold air passes through the first chamber from bottom to top to dissipate heat from the first module located in the lower half of the cabinet. The second module located in the upper half of the cabinet is attached to the heat sink. Some cold air passes through the heat dissipation duct from bottom to top to blow on the heat sink to remove heat from the second module and dissipate heat from it. Since the first chamber and the second chamber can each be vented with cold air, uniform heat dissipation can be ensured for the first module and the second module, avoiding the problem of local hot spots and improving the heat dissipation effect of the cabinet.

[0017] Secondly, the present invention also provides a cabinet, comprising:

[0018] The above-mentioned heat dissipation structure for power equipment cabinets used in nuclear power plants;

[0019] The first module is placed in the accommodating cavity;

[0020] The second module is placed in the second chamber;

[0021] The fan assembly is located inside the cabinet cavity and connected to the top of the heat dissipation duct.

[0022] As a limitation of the present invention, the second module is distributed in multiple sets at intervals along the left and right directions of the cabinet; the fan assembly includes multiple exhaust fans arranged at intervals along the left and right directions of the cabinet, and the multiple exhaust fans correspond one-to-one with the multiple second modules.

[0023] The cabinet provided by the present invention adopts the above-mentioned heat dissipation structure for power equipment cabinets used in nuclear power plants. The first chamber and the second chamber can be vented with cold air, which can ensure uniform heat dissipation for the first module and the second module, avoid local hot spots, and improve the heat dissipation effect of the cabinet. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the heat dissipation structure of the power supply equipment cabinet for nuclear power plants provided in an embodiment of the present invention (the left side panel of the cabinet is not shown in the figure).

[0026] Figure 2 A left-side view of the heat dissipation structure of the power equipment cabinet for a nuclear power plant provided in an embodiment of the present invention (the left side panel is not shown in the figure).

[0027] Figure 3 A schematic diagram of the cabinet structure provided for an embodiment of the present invention (the left side panel of the cabinet is not shown in the figure).

[0028] Figure 4 A schematic diagram of the left-side structure of the cabinet provided in an embodiment of the present invention (the left side panel of the cabinet is not shown in the figure);

[0029] Figure 5 A schematic diagram of the main structure of the cabinet provided in an embodiment of the present invention. Figure 1 ;

[0030] Figure 6 A schematic diagram of the main structure of the cabinet provided in an embodiment of the present invention. Figure 2 (The upper half of the front panel of the cabinet is not shown in the picture.)

[0031] In the picture:

[0032] 1. Cabinet; 11. First chamber; 111. Receiving cavity; 112. Ventilation cavity; 12. Second chamber; 13. First air inlet; 14. Second air inlet; 15. Air outlet; 2. Partition structure; 21. Baffle; 22. Guide plate; 221. Horizontal extension; 222. Vertical extension; 3. Heat dissipation duct; 31. First air duct; 32. Second air duct; 321. Inlet; 322. Flared section; 4. Radiator; 51. First module; 52. Second module; 53. Third module; 6. Exhaust fan. Detailed Implementation

[0033] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] Please refer to the following: Figure 1 and Figure 2 The heat dissipation structure of the power supply equipment cabinet for nuclear power plants provided by the present invention will now be described. The heat dissipation structure of the power supply equipment cabinet for nuclear power plants includes a cabinet body 1, and a partition structure 2 and a heat dissipation duct 3 respectively disposed in the cabinet body 1 and connected from bottom to top; a heat sink 4 is provided in the heat dissipation duct 3;

[0035] The partition structure 2 and the heat dissipation duct 3 divide the inner cavity of the cabinet 1 into a first chamber 11 and a second chamber 12. The first chamber 11 includes a accommodating cavity 111 and a ventilation cavity 112 that are connected vertically. The accommodating cavity 111 is used to place the first module 51. The second chamber 12 is located above the accommodating cavity 111 and in front of the ventilation cavity 112. The second chamber 12 is used to place the second module 52, and the second module 52 is fitted to the heat sink 4.

[0036] The bottom plate and / or side plate of the cabinet 1 are provided with a first air inlet 13, and the side plate of the cabinet 1 is provided with a second air inlet 14; the top plate of the cabinet 1 is provided with an air outlet 15; the heat dissipation duct 3 is provided with a second ventilation opening below the radiator 4; wherein, the first air inlet 13, the first chamber 11, and the air outlet 15 are connected in sequence; the second air inlet 14, the second ventilation opening, the heat dissipation duct 3, and the air outlet 15 are connected in sequence.

[0037] Cabinet 1 has a rectangular structure, consisting of a front panel, a rear panel, a left side panel, a right side panel, a top panel, a bottom panel, and a support frame connecting and supporting these panels. Additionally, a support base can be installed at the bottom of cabinet 1, and a rain shield can be installed at the top. Furthermore, a fan assembly is installed above the heat dissipation duct 3 within the interior cavity of cabinet 1; the fan assembly is used to draw air upwards, causing the airflow to move rapidly.

[0038] The partition structure 2 is located in the middle and upper part of the inner cavity of the cabinet 1, and the heat dissipation duct 3 is located at the top of the inner cavity of the cabinet 1. A fan assembly is connected above the heat dissipation duct 3. The partition structure 2 and the heat dissipation duct 3 are mainly used to separate the inner cavity of the cabinet 1, so that they form a first chamber 11 and a second chamber 12 that are not connected to each other and are independent.

[0039] The accommodating cavity 111 of the first chamber 11 occupies the lower half of the inner cavity of the cabinet 1, and the ventilation cavity 112 occupies the upper rear half of the inner cavity of the cabinet 1. Cold air enters the first chamber 11 from the first air inlet 13 and flows from bottom to top through the first chamber 11, passing through the first module 51 to carry away the heat of the first module 51 and dissipate heat from it. Finally, it flows out of the cabinet 1 from the air outlet 15.

[0040] The first air inlet 13 is located on the bottom plate of the cabinet 1 and / or on the side plate of the cabinet 1. Considering the need for the cabinet 1 to be placed side by side and against a wall, the first air inlet 13 is preferably located at the bottom of the front side plate of the cabinet 1, such as... Figure 1 As shown. Specifically, the first air inlet 13 is a mesh, and filter cotton can be installed behind it.

[0041] The second chamber 12 is located above the accommodating cavity 111. In order to facilitate the daily maintenance of the second module 52 in the second chamber 12, the second module 52 should face the front side panel of the cabinet 1 directly. Therefore, the second chamber 12 is located in front of the ventilation cavity 112. That is to say, the second chamber 12 occupies the upper front half of the inner cavity of the cabinet 1. It should be noted that since the ventilation cavity 112 is mainly used for ventilation of cold air, electrical components that need to be maintained cannot be installed in it. Therefore, in the front-back direction of the cabinet 1, the width of the ventilation cavity 112 is smaller than the width of the second chamber 12.

[0042] The second air inlet 14 is preferably located in the middle part of the front side panel of the cabinet 1, such as... Figure 1 As shown. The second air inlet 14 is also a mesh, and filter cotton can also be installed behind it.

[0043] The second module 52 is attached to the heat sink 4 and dissipates heat through the heat sink 4. The second module 52 can be a high-heat-generating device. Specifically, the heat sink 4 can adopt a common structure in the prior art, including a heat sink substrate and multiple heat sink fins connected to the heat sink substrate. The second module 52 is attached to the heat sink substrate. Cool air flows from bottom to top through the heat dissipation channel 3, blowing on the heat sink 4 to carry away the heat from the second module 52 and dissipate its heat.

[0044] Since the second module 52 dissipates heat through the heat sink 4, and the heat sink 4 is located within the heat dissipation duct 3, the second chamber 12 can be used as a closed chamber. The cold air passing through the second air inlet 14 directly enters the heat dissipation duct 3 (without entering the second chamber 12, thus avoiding blowing on the second module 52). This allows the cabinet to be used in harsh environments such as high temperature, high humidity, and high dust. If other modules are also installed in the second chamber 12, a guide fan can be installed in the second chamber 12 to circulate the airflow and remove heat from the other modules.

[0045] Of course, the second chamber 12 can also be an open chamber, with some of the cool air entering the cooling duct 3 through the second air inlet 14 and some entering the second chamber 12. The specific form of the second chamber 12 depends on the cabinet design requirements and the installation environment.

[0046] The heat dissipation structure for the power equipment cabinet of a nuclear power plant provided by this invention, compared with the prior art, uses a partition structure 2 and a heat dissipation duct 3 to divide the inner cavity of the cabinet into a first chamber 11 and a second chamber 12 that are not interconnected. Some of the cold air passes through the first chamber 11 from bottom to top to dissipate heat from the first module 51 located in the lower half of the cabinet body 1; the second module 52 located in the upper half of the cabinet is attached to the heat sink 4, and some of the cold air passes through the heat dissipation duct 3 from bottom to top to blow on the heat sink 4 to remove the heat from the second module 52 and dissipate heat from it; since the first chamber 11 and the second chamber 12 can each be vented with cold air, it can ensure uniform heat dissipation for the first module 51 and the second module 52, avoid the problem of local hot spots, and improve the heat dissipation effect of the cabinet body 1.

[0047] In some embodiments, the aforementioned partition structure 2 may adopt the following... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The partition structure 2 has an air inlet channel, the front end of which is connected to the second air inlet 14, and the rear end of which faces the second ventilation opening.

[0048] The second air inlet 14 extends along the left-right direction of the cabinet 1, and its total length is slightly less than the width of the front panel of the cabinet 1. This means the total opening area of ​​the second air inlet 14 is large, ensuring a sufficient supply of cool air. Because of the large opening area of ​​the second air inlet 14, an air intake channel is formed on the partition structure 2 to ensure that the heat dissipation channel can receive a large amount of cool air. The air intake channel acts as a guide, directing external cool air towards the heat dissipation duct 3 to remove heat from the radiator 4 and ensure sufficient heat dissipation for the second module 52.

[0049] The air intake channel can be a closed channel, with its front end connected to the second air inlet 14 and its rear end connected to the second ventilation outlet. In this way, cold air from the outside flows through the second air inlet 14, sequentially through the air intake channel and the heat dissipation duct 3, carrying away the heat from the radiator 4 to dissipate heat from the second module 52, and then flows out from the air outlet 15. Since the cold air from the outside does not pass through the second chamber 12, the second chamber 12 can be a closed chamber.

[0050] The air intake channel can also be a non-enclosed channel. For example, its front end connects to the second air intake 14, and its rear end connects to the second ventilation port. Some of the cold air from the outside enters the heat dissipation channel through the air intake channel, takes away the heat of the radiator 4, and dissipates the heat of the second module 52, and then flows out from the air outlet 15. Some of the cold air enters the second chamber 12 through the second air intake 14 and / or the air outlet of the air intake channel to dissipate the heat of the module in the second chamber 12.

[0051] In some embodiments, the aforementioned partition structure 2 may adopt the following... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The baffle structure 2 includes a baffle 21 and a guide plate 22. The front end of the baffle 21 is located directly behind the second air inlet 14, and the rear end is located below the second vent. The guide plate 22 includes a lateral extension 221 and a vertical extension 222 connected in sequence. The front end of the lateral extension 221 is located directly behind the second air inlet 14 and directly below the baffle 21, and the vertical extension 222 is located behind the baffle 21, with its upper end connected to the second vent. An air intake channel is formed between the baffle 21 and the lateral extension 221.

[0052] The left and right edges of the air deflector 22 are connected to the side panels or frame of the cabinet 1, respectively. The air deflector 22 is a bent plate, specifically including a horizontal extension 221 and a vertical extension 222. The horizontal extension 221 extends along the front-rear direction of the cabinet 1, and its front edge is connected to the front side panel of the cabinet 1. The vertical extension 222 extends along the vertical direction of the cabinet 1, or is slightly inclined relative to the vertical direction of the cabinet 1. The lower end of the vertical extension 222 is connected to the front end of the horizontal extension 221, and the upper end is connected to the lower end of the heat dissipation duct 3.

[0053] The baffle plate 22, combined with the heat dissipation duct 3, divides the inner cavity of the cabinet 1 into a first chamber 11 and a second chamber 12. In addition, the baffle plate 22 also serves to block and guide airflow.

[0054] The baffle 21 is located directly above the lateral extension 221 and cooperates with the lateral extension 221 to form an air intake channel. The rear end of the baffle 21 is slightly forward relative to the rear end of the lateral extension 221, so there is a ventilation gap between the rear end of the baffle 21 and the vertical extension 222. This ensures that some cold air can pass smoothly through the air intake channel and enter the heat dissipation duct 3, and also allows some cold air to enter the second chamber 12 to further dissipate heat from the second module 52.

[0055] Preferably, the vertical extension 222 is slightly inclined relative to the vertical direction of the cabinet 1. Specifically, the vertical extension 222 is inclined backward from bottom to top. Since the air inlet channel extends along the front-back direction of the cabinet 1, the vertical extension 222 adopts the above-mentioned method, which on the one hand can avoid being directly impacted by a large amount of cold air and unable to be diverted, thus preventing backflow, and allowing the guide plate 22 to further play a guiding role; on the other hand, it can also increase the strength of the guide plate 22 and extend its service life.

[0056] In some embodiments, the second chamber 12 is further used to house a third module 53, which is electrically connected to the second module 52; the third module 53 is placed on the baffle 21.

[0057] The modules installed in the second chamber 12 are determined according to the functions to be performed by the cabinet. Since the second module 52 is attached to the heat sink 4, the heat dissipation duct 3 is located in the middle and rear of the cabinet 1, and the partition structure 2 is below the heat dissipation duct 3, there is space in front of and below the second module 52 for the installation of other modules.

[0058] In this embodiment, a third module 53 is installed in front of and below the second module 52, and the third module 53 is placed on the baffle 21. The baffle 21, relative to the fixing bracket of the third module 53, not only makes full use of the internal space of the second chamber 12, but also eliminates the support structure of the third module 53, thus reducing costs.

[0059] In addition, since the front end of the support plate is located directly behind the second air inlet 14, cold air from the outside can be blown directly to the third module 53 through the second air inlet 14 to dissipate heat from the third module 53.

[0060] Because a fan assembly is located above the heat dissipation duct 3, the fan assembly draws air, which accelerates the airflow speed and improves the heat dissipation efficiency for the second module 52 and the third module 53. To further increase the airflow velocity and prevent interference from multiple airflows converging at the top of the cabinet 1, preferably, the top of the heat dissipation duct 3 horizontally blocks the inner cavity of the cabinet 1, such as... Figure 1 As shown, all airflow entering the cabinet 1 must enter the heat dissipation duct 3 and then flow out from the air outlet 15.

[0061] To ensure that the airflow in the second chamber 12 can flow upwards out of the cabinet 1, a third vent is provided on the heat dissipation duct 3, which is connected to the second chamber 12. The cold air entering the second chamber 12 through the second air inlet 14 flows upwards, passes through the third module 53 and the second module 52 in sequence to carry away heat, and then enters the heat dissipation duct 3 through the third vent, and finally flows out of the cabinet 1 through the air outlet 15.

[0062] In addition, to ensure that the airflow in the first chamber 11 can flow upward out of the cabinet 1, a first vent is provided on the heat dissipation duct 3, which is connected to the first chamber 11. The cold air entering the first chamber 11 through the first air inlet 13 flows upward, carries away the heat through the first module 51, and then enters the heat dissipation duct 3 through the first vent, and finally flows out of the cabinet 1 through the air outlet 15.

[0063] Preferably, multiple third vents and multiple first vents are distributed at intervals along the left-right direction of the cabinet 1, and the multiple third vents correspond one-to-one with the multiple first vents in the front-back direction of the cabinet 1. In addition to airflow, copper busbars can also be installed through the third vents and the first vents. That is, the copper busbars electrically connected to the first module 51 or the second module 52 can pass through the third vents, through the heat dissipation duct 3, and then connect to other electrical components in the first chamber 11.

[0064] It should be noted that, in order to ensure that the copper busbar is insulated from the heat dissipation duct 3, an insulating plate is provided on the outer periphery of the multiple third ventilation openings and the outer periphery of the multiple first ventilation openings.

[0065] In some embodiments, the aforementioned heat dissipation duct 3 can adopt the following... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The heat dissipation duct 3 includes a first duct 31 and a second duct 32 connected sequentially from bottom to top; the radiator 4 is located inside the first duct 31, and the internal cavity structure of the first duct 31 is adapted to the structure of the radiator 4; a second vent is formed at the lower end of the first duct 31.

[0066] The heat sink 4 can adopt a common structure in the prior art, including a heat sink base plate and multiple heat sink fins connected to the heat sink base plate. The surface of the heat sink base plate is perpendicular to the front-back direction of the cabinet 1, and the second module 52 is attached to the heat sink base plate. The surface of the heat sink fins is perpendicular to the left-right direction of the cabinet 1, and multiple heat sink fins are spaced apart along the left-right direction of the cabinet 1.

[0067] The internal structure of the first air duct 31 is adapted to the structure of the radiator 4. In other words, the cold air passing through the first air duct 31 will all pass through the radiator 4 and carry away the heat, thereby avoiding the loss of cold air.

[0068] Since the first module 51 is attached to the heat dissipation substrate, the front sidewall of the first air duct 31 is the heat dissipation substrate. Furthermore, the internal structure of the first air duct 31 is compatible with the structure of the heat sink 4, and the other sidewalls of the first air duct 31 can also be considered as a support frame for fixing the heat sink 4. This support frame consists of a left support plate, a right support plate, and a rear support plate, forming a rectangular frame within which the heat sink 4 is fixed. Therefore, the fixing frame and the heat dissipation substrate together form the first air duct 31.

[0069] In some embodiments, the second air duct 32 described above can be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The second air duct 32 includes an inlet 321 and a flared part 322 connected sequentially from bottom to top; the internal cavity structure of the inlet 321 is the same as that of the first air duct 31; the flared part 322 expands outward from bottom to top.

[0070] The inlet 321 connects to the first air duct 31, serving as an intermediate transition. The flared section 322 has a trumpet-shaped structure, with its top horizontally blocking the inner cavity of the cabinet 1, and a fan assembly is located above it. The front side wall of the flared section 322 has multiple third ventilation openings, and the rear side wall has multiple first ventilation openings.

[0071] The flared section 322 serves to gather airflow, preventing interference from multiple airflows converging at the top of the cabinet 1, and can also accelerate the airflow speed, improving the heat dissipation efficiency of the first module 51, the second module 52, and the third module 53.

[0072] Please see as follows Figures 3 to 6 Based on the same inventive concept, this application also provides a cabinet, including the above-mentioned heat dissipation structure of the power supply equipment cabinet for nuclear power plants, a first module 51, a second module 52 and a fan assembly; the first module 51 is placed in the accommodating cavity 111; the second module 52 is placed in the second chamber 12; the fan assembly is located in the inner cavity of the cabinet 1 and is connected to the top of the heat dissipation duct 3.

[0073] The cabinet provided by this invention adopts the above-mentioned heat dissipation structure of a power equipment cabinet for nuclear power plants. The internal cavity of the cabinet is divided into a first chamber 11 and a second chamber 12 that are not interconnected by a partition structure 2 and a heat dissipation duct 3. Some of the cold air passes through the first chamber 11 from bottom to top to dissipate heat from the first module 51 located in the lower half of the cabinet body 1. The second module 52 located in the upper half of the cabinet is attached to the heat sink 4. Some of the cold air passes through the heat dissipation duct 3 from bottom to top to blow on the heat sink 4 to remove the heat from the second module 52 and dissipate heat from it. Since the first chamber 11 and the second chamber 12 can each be vented with cold air, it can ensure uniform heat dissipation for the first module 51 and the second module 52, avoid the problem of local hot spots, and improve the heat dissipation effect of the cabinet body 1.

[0074] In some embodiments, the second module 52 and the fan assembly described above can be adopted as follows: Figure 6 The structure shown is described in the following document. Figure 6 The second module 52 is distributed in multiple groups at intervals along the left and right directions of the cabinet 1; the fan assembly includes multiple exhaust fans 6 arranged at intervals along the left and right directions of the cabinet 1, and the multiple exhaust fans 6 correspond one-to-one with the multiple second modules 52.

[0075] The number of second modules 52 depends on the functions and power requirements of the cabinet, while the number of exhaust fans 6 corresponds to the number of second modules 52. This ensures even heat dissipation for multiple second modules 52, maintaining a uniform temperature and further preventing localized hotspots.

[0076] Moreover, multiple exhaust fans are installed, so even if one of them fails, the fan assembly can still operate normally and will not cause overheating inside the cabinet.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat dissipation structure for a power supply equipment cabinet in a nuclear power plant, characterized in that, It includes a cabinet (1), and a partition structure (2) and a heat dissipation duct (3) respectively arranged in the cabinet (1) and connected from bottom to top; the heat dissipation duct (3) is provided with a radiator (4); The partition structure (2) and the heat dissipation duct (3) divide the inner cavity of the cabinet (1) into a first chamber (11) and a second chamber (12) that are not interconnected. The first chamber (11) includes a accommodating cavity (111) and a ventilation cavity (112) that are connected vertically. The accommodating cavity (111) is used to place the first module (51). The second chamber (12) is located above the accommodating cavity (111) and in front of the ventilation cavity (112). The second chamber (12) is used to place the second module (52), which is a high-heat-generating device. The second module (52) is fitted to the heat sink (4). The top of the heat dissipation duct (3) is horizontally blocked from the inner cavity of the cabinet (1); the heat dissipation duct (3) is provided with a first ventilation opening communicating with the first chamber (11) and a third ventilation opening communicating with the second chamber (12); The cabinet (1) has a first air inlet (13) on its bottom plate and / or on its side plate, and a second air inlet (14) on its side plate; the cabinet (1) has an air outlet (15) on its top plate; and the heat dissipation duct (3) has a second ventilation opening below the radiator (4). The first air inlet (13), the first chamber (11), the first vent, and the air outlet (15) are connected in sequence; the second air inlet (14), the second vent, the heat dissipation duct (3), and the air outlet (15) are connected in sequence; the second air inlet (14), the second chamber (12), the third vent, and the air outlet (15) are connected in sequence. The partition structure (2) forms an air inlet channel, the front end of which is connected to the second air inlet (14), and the rear end of which faces the second ventilation opening; the partition structure (2) includes: The front end of the baffle (21) is located directly behind the second air inlet (14), and the rear end is located below the second ventilation opening; The guide plate (22) includes a horizontal extension (221) and a vertical extension (222) connected in sequence; the front end of the horizontal extension (221) is located directly behind the second air inlet (14) and directly below the baffle (21); the vertical extension (222) is located behind the baffle (21) and there is a ventilation gap between the two; the upper end of the vertical extension (222) is inclined backward from bottom to top and connected to the second air inlet; wherein, the air inlet channel is formed between the baffle (21) and the horizontal extension (221).

2. The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in claim 1, characterized in that, The second chamber (12) is also used to place a third module (53), which is electrically connected to the second module (52); the third module (53) is placed on the baffle (21).

3. The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in claim 1, characterized in that, The heat dissipation duct (3) includes a first duct (31) and a second duct (32) connected sequentially from bottom to top; the radiator (4) is located in the first duct (31), and the internal cavity structure of the first duct (31) is adapted to the structure of the radiator (4); the lower end of the first duct (31) forms the second ventilation opening.

4. The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in claim 3, characterized in that, The second air duct (32) includes an inlet (321) and a flared part (322) connected sequentially from bottom to top; the inner cavity structure of the inlet (321) is the same as that of the first air duct (31); the flared part (322) expands outward from bottom to top.

5. The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in claim 1, characterized in that, The top of the heat dissipation duct (3) is horizontally blocked from the inner cavity of the cabinet (1); the heat dissipation duct (3) is also provided with a first ventilation opening communicating with the first chamber (11) and a third ventilation opening communicating with the second chamber (12).

6. The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in claim 5, characterized in that, The first ventilation opening and the third ventilation opening correspond to each other along the front and rear direction of the cabinet (1); a copper busbar is provided in the heat dissipation duct (3) between the first ventilation opening and the third ventilation opening.

7. A server rack, characterized in that, include: The heat dissipation structure for the power supply equipment cabinet of a nuclear power plant as described in any one of claims 1-6; The first module (51) is placed in the accommodating cavity (111); The second module (52) is placed in the second chamber (12); The fan assembly is located inside the cabinet (1) and connected to the top of the heat dissipation duct (3).

8. The cabinet as described in claim 7, characterized in that, The second module (52) is distributed in multiple groups at intervals along the left and right directions of the cabinet (1); the fan assembly includes multiple exhaust fans (6) arranged at intervals along the left and right directions of the cabinet (1), and the multiple exhaust fans (6) correspond one-to-one with the multiple second modules (52).

Images