LRM rack heat dissipation structure and electronic equipment

Abstract

The utility model discloses an LRM rack heat dissipation structure and an electronic device, and belongs to the technical field of LRMs, the LRM rack heat dissipation structure comprises a rack, a fan unit and a shock absorber, the rack is internally provided with at least three LRM modules which are sequentially arranged along the length direction of the rack; the shock absorbers are installed at the bottom of the rack and at least located at the two ends of the rack in the length direction. The fan units are located in the areas between the adjacent shock absorbers at the bottom of the rack and can slide in the length or width direction of the rack. The fan unit is provided with a fan installation cavity used for installing a fan, the LRM module right opposite to the fan installation cavity is a center LRM module, the other LRM modules are edge LRM modules, the fan installation cavity is connected with the center LRM module through a vertical communication air duct, and the fan installation cavity is connected with the edge LRM modules through inclined communication air ducts. Air flow in the fan mounting cavity is led to the heat dissipation teeth of the LRM modules for heat dissipation; and under the condition of ensuring that the fan unit has a quick plugging function, the requirement for heat dissipation of the LRM modules at all the slot positions is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to LRM (Line Replaceable Module, field replaceable module) technical field, especially a kind of LRM rack heat dissipation structure and electronic equipment. BACKGROUND

[0002] With the rapid development of science and technology and weapon industry, the functional integration of military electronic equipment is higher and higher, the environmental adaptability requirement is also more and more severe, and the structure appearance is more and more compact, therefore, higher degree of comprehensive optimization structure form is needed to meet the use requirement.

[0003] To adapt to the severe impact and vibration requirements of army weapon platform, LRM rack is designed for generalization of shock resistance and impact resistance, to cope with different working environment, metal shock absorber, rubber shock absorber or steel wire shock absorber is installed between the supporting plate and the fixed bottom plate of the mounting rack. To adapt to the severe heat dissipation requirements of army weapon platform, LRM rack will fix fan unit at the lower end of supporting plate, and fan unit will form air duct with LRM module heat dissipation teeth through long slot on rack supporting plate. However, after installing shock absorber, part of plug-in channel of fan unit is occupied, resulting in that the fan unit installed in LRM rack with plug-in fan unit for heat dissipation cannot avoid shock absorber and cannot be full of the lower end of supporting plate, resulting in that fan unit cannot directly blow to LRM module located at the space occupied by shock absorber on LRM rack, resulting in that the part of LRM module is difficult to dissipate heat. If fan unit is full of the lower end of supporting plate to cover the wind of fan unit to all slot LRM modules, fan unit can only be fixed at the lower end of supporting plate, and cannot realize the function of plug-in.

[0004] Therefore, how to design a kind of LRM rack heat dissipation structure and electronic equipment, which can meet the functional requirements of LRM fan unit with quick plug-in, and also consider the heat dissipation requirements of each slot LRM module, to adapt to the complex and severe combat environment and combat requirements of army is a technical problem to be solved by the skilled in the art. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defects and deficiencies in the prior art, and provides a kind of LRM rack heat dissipation structure and electronic equipment, which can meet the requirements of LRM fan unit with quick plug-in function, and also consider the heat dissipation requirements of each slot LRM module, to adapt to the complex and severe combat environment and combat requirements of army.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of LRM rack heat dissipation structure, comprising: rack, the inside of the rack is equipped with at least three LRM modules sequentially arranged along the length direction of the rack;Shock absorber, the shock absorber is installed in the bottom of the rack, and at least located in the length direction of the rack two ends;

[0008] Fan unit, the fan unit is located at the bottom of the rack between adjacent the shock absorber area, and can be along the length direction or width direction of the rack sliding;The fan unit has fan mounting cavity for installing fan, and the LRM module opposite with the fan mounting cavity is center LRM module, and the remaining LRM module is edge LRM module, the fan mounting cavity is connected with the heat dissipation tooth of the center LRM module by vertical communication air duct, and the fan mounting cavity is connected with the edge LRM module by inclined communication air duct, to guide the airflow in the fan mounting cavity to the heat dissipation tooth of each LRM module respectively, and the heat dissipation of each LRM module is carried out.

[0009] In an embodiment, the bottom surface of the rack is provided with a supporting plate, and a plurality of air outlets are arranged on the supporting plate, and the heat dissipation tooth of one LRM module corresponds to at least one air outlet;The air outlet corresponding to the heat dissipation tooth of the center LRM module is connected with the fan mounting cavity through the first air guide channel arranged vertically, and the air outlet corresponding to the heat dissipation tooth of the edge LRM module is connected with the fan mounting cavity through the second air guide channel arranged obliquely;The first air guide channel and the corresponding air outlet are connected to form the vertical communication air duct, and the second air guide channel and the corresponding air outlet are connected to form the inclined communication air duct.

[0010] In an embodiment, the second air guide channel comprises a left second air guide channel and a right second air guide channel, the right side of the rack is provided with a zeroth slot LRM module and a first slot LRM module, the bottom of the support plate is provided with an air guide baffle at a position corresponding to the zeroth slot LRM module and a position corresponding to the first slot LRM module, the end of the air guide baffle away from the support plate is inclined to the side close to the fan mounting cavity, and the right second air guide channel is formed between the two air guide baffles; the heat dissipation teeth of the zeroth slot LRM module and the first slot LRM module are close to each other and communicate with the right second air guide channel; the left side of the rack is provided with a last slot LRM module, the LRM module next to the last slot LRM module is a penultimate slot LRM module, the bottom of the support plate is also provided with the air guide baffle at a position corresponding to the last slot LRM module and a position corresponding to the penultimate slot LRM module, the end of the air guide baffle away from the support plate is also inclined to the side close to the fan mounting cavity, and the left second air guide channel is formed between the adjacent air guide baffles and communicates with the heat dissipation teeth of the last slot LRM module.

[0011] In an embodiment, the LRM module next to the first slot LRM module is a second slot LRM module, the end of the air guide baffle at the bottom of the first slot LRM module close to the fan mounting cavity is on the extension line of the central axis of the heat dissipation teeth of the second slot LRM module; the end of the air guide baffle at the bottom of the penultimate slot LRM module close to the fan mounting cavity is on the extension line of the central axis of the heat dissipation teeth of the penultimate slot LRM module.

[0012] In an embodiment, the zeroth slot LRM module is the edge LRM module, the first slot LRM module is the edge LRM module or the center LRM module, the second slot LRM module is the center LRM module, the last slot LRM module is the edge LRM module, and the penultimate slot LRM module is the center LRM module.

[0013] In an embodiment, the fan mounting cavity is also provided with a control board, the control board is in a long strip structure and is located at the front end / last end of the fan mounting cavity.

[0014] In an embodiment, the aspect ratio of the control board is not less than 10:1.

[0015] In an embodiment, the fan mounting cavity is provided with a fan cover plate facing an end cover of the LRM module, the fan cover plate is provided with an air outlet hole at a position corresponding to the fan, the first air guide channel and the second air guide channel are connected with the fan mounting cavity through the air outlet hole; the fan cover plate covers all the air outlets on the supporting plate, and the edges of the fan cover plate without the air outlet hole are respectively coincident with the leftmost and rightmost air guide baffles.

[0016] In an embodiment, the bottom of the rack is provided with two groups of sliding assemblies, the two groups of sliding assemblies are respectively located at two ends of the length direction of the rack and extend along the width direction of the rack, and the fan unit is slidingly connected with the rack through the sliding assemblies; the sliding assembly comprises a guide rail and the fan cover plate, the guide rail is installed on the bottom surface of the supporting plate and is slidingly connected with the fan cover plate.

[0017] The utility model discloses still provide a kind of electronic equipment, including the LRM rack heat dissipation structure.

[0018] The utility model relative to prior art obtains following technical effect:

[0019] Since the shock absorber is arranged at least at two ends of the length direction of the rack, that is, occupies the installation space of the fan unit in the length and width directions of the rack, to enable the fan unit to be plugged and unplugged, that is, to be able to slide relative to the rack, it is necessary to reduce the volume of the fan unit, so that the fan unit cannot completely cover the bottom surface of the rack, causing the air blown out from the fan unit to be unable to directly blow to the LRM modules located at the edges of the rack, affecting the heat dissipation of these LRM modules. Based on this, the vertical communication air duct is provided to enable the air in the fan mounting cavity to directly blow to the central LRM module, and the inclined communication air duct is provided to enable the air in the fan mounting cavity to blow to the edge LRM module in an inclined direction, realizing the technical effect of guiding the air in the fan mounting cavity to the heat dissipation teeth of each LRM module to dissipate heat for each LRM module. Under the condition of ensuring that the fan unit has the quick plugging and unplugging function, the heat dissipation demand of the fan unit for each slot LRM module is considered, to adapt to the complex and severe combat environment and combat requirements of the army. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1A front view structural schematic diagram of the LRM rack heat dissipation structure disclosed in an embodiment of the present application;

[0022] Figure 2 A top view structural schematic diagram of the LRM rack heat dissipation structure disclosed in an embodiment of the present application;

[0023] Figure 3 A structural schematic diagram of the communication air duct of the LRM rack heat dissipation structure disclosed in an embodiment of the present application;

[0024] Figure 4 A sectional structural schematic diagram of the communication air duct;

[0025] Figures 5 to 7 A structural schematic diagram of the supporting plate disclosed in an embodiment of the present application; wherein Figure 5 the structural features of the front face of the supporting plate are shown, Figure 6 the structural features of the back face of the supporting plate are shown, Figure 7 a sectional schematic diagram of the supporting plate is shown;

[0026] Figure 8 A structural schematic diagram of the fan unit disclosed in an embodiment of the present application;

[0027] Figure 9 A top view structural schematic diagram of the fan unit disclosed in an embodiment of the present application, with the fan cover plate removed;

[0028] Figure 10 A bottom view structural schematic diagram of the fan unit disclosed in an embodiment of the present application;

[0029] Figure 11 A partial sectional view of the LRM rack heat dissipation structure disclosed in an embodiment of the present application, with the LRM modules removed.

[0030] Wherein, 1, rack; 2, zeroth slot LRM module; 3, first slot LRM module; 4, second slot LRM module; 5, penultimate slot LRM module; 6, last slot LRM module; 7, fan unit; 8, shock absorber; 9, supporting plate; 10, second air guide passage; 10-1, left second air guide passage; 10-2, right second air guide passage; 11, end of the air guide baffle located at the bottom of the penultimate slot LRM module, close to the fan mounting cavity; 12, first air guide passage; 13, fan mounting cavity; 14, end of the air guide baffle located at the bottom of the first slot LRM module, close to the fan mounting cavity; 15, air guide baffle; 16, guide rail; 17, fan cover plate; 18, air outlet; 19, air hole; 20, fan; 21, control board; 22, bottom plate; 23, heat dissipation tooth. DETAILED DESCRIPTION

[0031] 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 protection scope of the present utility model.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 11 As shown, this utility model provides an LRM rack heat dissipation structure, including: a rack 1, a fan unit 7, and a shock absorber 8. The rack 1 has at least three LRM modules arranged sequentially along its length. The specific number of LRM modules can be set according to actual conditions. The shock absorber 8 is installed at the bottom of the rack 1 and is located at least at both ends of the rack 1's length. See also... Figure 11 In one embodiment, shock absorbers 8 are provided at each of the four corners of the frame 1, and a base plate 22 is provided at the bottom of the frame 1. One end of the shock absorber 8 is detachably fixed to the base plate 22, and the other end is detachably fixed to the frame 1 or a component installed at the bottom of the frame 1, such as a support plate 9. The fan unit 7 is located at the bottom of the frame 1 in the area between adjacent shock absorbers 8 and can slide along the length or width direction of the frame 1; wherein, the length direction of the frame 1 is shown in [reference needed]. Figure 1 In the X direction, the width direction of rack 1 is shown in the figure. Figure 11 The fan unit 7 has a fan mounting cavity 13 for mounting the fan 20. The LRM module directly opposite the fan mounting cavity 13 is the center LRM module, and the remaining LRM modules are edge LRM modules. That is, the LRM modules located at both ends of the frame 1 along the length direction, corresponding to the installation positions of the shock absorbers 8, are called edge LRM modules. The fan mounting cavity 13 is connected to the heat dissipation fins of the center LRM module through a vertical connecting ventilation channel, and the fan mounting cavity 13 is connected to the edge LRM modules through an inclined connecting ventilation channel, so that the airflow in the fan mounting cavity 13 is respectively directed to the heat dissipation fins of each LRM module. The airflow path to the heat dissipation fins of each LRM module is shown in [reference]. Figure 3 This achieves the technical effect of heat dissipation for each LRM module, solving the problem that some LRM modules have difficulty in heat dissipation because the fan units 7 cannot be fully distributed at the bottom of the rack 1.

[0034] See Figures 3 to 7The bottom surface of the rack 1 is provided with a support plate 9, and the support plate 9 is provided with a plurality of air outlets 18. Each LRM module's heat dissipation fins correspond to at least one air outlet 18. In one embodiment, one air outlet 18 corresponds to one LRM module; in another embodiment, if the LRM module itself is large or if there are two or more sets of heat dissipation fins along the length of the rack, the LRM module can also correspond to two or more air outlets 18. The air outlet 18 corresponding to the heat dissipation fins of the central LRM module is connected to the fan mounting cavity 13 through a vertically arranged first air guide channel 12, and the air outlet 18 corresponding to the heat dissipation fins of the edge LRM modules is connected to the fan mounting cavity 13 through an inclined second air guide channel 10. The first air guide channel 12 and the corresponding air outlet 18 are connected to form a vertical ventilation channel, and the second air guide channel 10 and the corresponding air outlet 18 are connected to form an inclined ventilation channel. By setting the inclined ventilation channel, the airflow generated in the fan mounting cavity 13 is guided to the edge LRM modules, thereby achieving heat dissipation for the edge LRM modules.

[0035] Since the central LRM module is located at the top of the fan mounting cavity 13, the air flowing out of the fan mounting cavity 13 can directly blow to the central LRM module, thus naturally forming the first air guide channel 12.

[0036] Regarding the configuration of the second air guide channel 10, for ease of description, each LRM module is numbered in a right-to-left or left-to-right order, where left and right correspond to the two ends of the rack 1 along its length. The LRM modules are then designated as LRM module 2 (slot 0), LRM module 3 (slot 1), LRM module 4 (slot 2), ..., LRM module 5 (slot 2 to 5), and LRM module 6 (slot 6). The second air guide channel 10 located on the left side of the rack 1 is referred to as the left second air guide channel 10-1, and the second air guide channel 10 located on the right side of the rack 1 is referred to as the right second air guide channel 10-2. The right side of the rack 1 is provided with a zero-slot LRM module 2 and a first-slot LRM module 3. Air guide baffles 15 are provided at the bottom of the tray 9 corresponding to both the zero-slot LRM module 2 and the first-slot LRM module 3. The ends of the two air guide baffles 15 away from the tray 9 are inclined towards the side closest to the fan mounting cavity 13, forming a right second air guide channel 10-2 between the two air guide baffles 15. The heat dissipation fins 23 of the zero-slot LRM module 2 and the first-slot LRM module 3 are close to each other and are connected to the right second air guide channel 10-2. In one embodiment, the zero-slot LRM module 2 adopts a reverse installation design, that is, the installation direction of each component of this module is opposite to that of the normal slot LRM, achieving the technical effect that the heat dissipation fins 23 of the zero-slot LRM module 2 and the first-slot LRM module 3 are close to each other and share a right second air guide channel 10-2.

[0037] The left side of the rack 1 is provided with the last slot LRM module 6 and the second-to-last slot LRM module 5. Air guide baffles 15 are also provided at the bottom of the tray 9 corresponding to the positions of the last slot LRM module 6 and the second-to-last slot LRM module 5. The ends of the air guide baffles 15 away from the tray 9 are inclined towards the side closer to the fan mounting cavity 13. A left second air guide channel 10-1 is formed between adjacent air guide baffles 15, and the left second air guide channel 10-1 is connected to the heat dissipation teeth 23 of the last slot LRM module 6. In other embodiments, the zeroth slot LRM module 2 and the first slot LRM module 3 can also be located on the left side of the rack 1, thus forming a left second air guide channel 10-1 with the air guide baffles corresponding to these two LRM modules; the last slot LRM module 6 and the second-to-last slot LRM module 5 can also be located on the right side of the rack 1, thus forming a right second air guide channel 10-2 with the air guide baffles corresponding to these two LRM modules.

[0038] The LRM module immediately adjacent to the first slot LRM module 3 is the second slot LRM module 4. The air guide baffle 15 located at the bottom of the first slot LRM module 3 is near the end of the fan mounting cavity 13. Figure 3 The location of number 14 is on the extension line of the central axis of the heat dissipation fins 23 of the second slot LRM module 4; it is located at the end of the air guide baffle 15 at the bottom of the penultimate slot LRM module 5 near the fan mounting cavity 13, i.e. Figure 3 The position marked 11 is located on the extension line of the central axis of the heat dissipation fins 23 of the LRM module 5 in the second-to-last slot. This allows for maximum airflow to the LRM modules on both sides of the rack 1 without affecting the airflow of the LRM modules 4 and 5 in the second-to-last slot. In other words, it provides sufficient airflow to the LRM modules 2 in the zeroth slot, 3 in the first slot, and 6 in the last slot, without affecting the heat dissipation of the LRM modules in adjacent slots.

[0039] Among them, LRM module 2 in slot 0 is an edge LRM module, LRM module 3 in slot 1 can be either an edge LRM module or a center LRM module, LRM module 5 in slot 2 is a center LRM module, LRM module 6 in slot 3 is an edge LRM module, and LRM module 5 in slot 4 is a center LRM module.

[0040] See Figure 9 The fan mounting cavity 13 also houses a control board 21, which is a long strip structure located at the front / rear end of the fan mounting cavity 13. The front and rear ends correspond to the two ends of the width direction of the frame 1, respectively, to increase the volume ratio of the fan 20 occupying the fan mounting cavity 13 and ensure that the fan unit 7 can provide sufficient output air volume.

[0041] In one embodiment, the aspect ratio of the control board 21 is not less than 10:1.

[0042] See Figure 4 , Figure 8 , Figure 10 A fan cover plate 17 is provided on the end of the fan mounting cavity 13 facing the LRM module. An air outlet 19 is provided on the fan cover plate 17 at a position corresponding to the fan 20. The first air guide channel 12 and the second air guide channel 10 are connected to the fan mounting cavity 13 through the air outlet 19. The fan cover plate 17 covers all the air outlets 18 on the support plate 9, and the edges of the fan cover plate 17 without air outlets 19 overlap with the leftmost and rightmost air guide baffles 15, respectively. This ensures that the airflow from the fan 20 can only flow out from the air outlets 18 on the support plate 9, guaranteeing the "sealing" of the airflow from the fan unit 7. That is, the airflow path from the fan mounting cavity 13 to each LRM module must ensure that as much airflow as possible is directed to the heat dissipation fins 23 of each LRM module, preventing airflow from escaping through the bypass path, which would cause heat dissipation difficulties for each LRM module due to excessive airflow leakage.

[0043] In one embodiment, the edges of the fan cover 17 without air outlets 19 are inserted into the bottom of the leftmost and rightmost air guide baffles 15, respectively.

[0044] See Figure 11 The bottom of the frame 1 is provided with two sets of sliding components, which are located at both ends of the length direction of the frame 1 and extend along the width direction of the frame 1. The fan unit 7 is slidably connected to the frame 1 through the sliding components. The sliding components can be electric, such as a gear and rack structure, a worm gear structure, a lead screw and nut structure, etc., or they can be manual, such as a sliding rail and slider mating structure. In one embodiment, the sliding components include a guide rail 16 and a fan cover plate 17. The left and right sides of the frame 1 are provided with support plates 9, and the bottom surface of the two support plates 9 is equipped with guide rails 16. The fan cover plate 17 is placed between the two guide rails 16 and is slidably connected to the guide rails 16. The fan cover plate 17 is detachably installed on the top surface of the housing constituting the fan mounting cavity 13, so that the fan unit 7 can be taken out and put in by pulling.

[0045] This utility model also provides an electronic device, including the above-mentioned LRM rack heat dissipation structure. Since the electronic device includes all the technical features of the above-mentioned LRM rack heat dissipation structure, it at least has all the technical effects of the above-mentioned LRM rack heat dissipation structure.

[0046] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat dissipation structure for an LRM rack, characterized in that, include: A rack, wherein at least three LRM modules are arranged sequentially along the length of the rack inside the rack; A shock absorber, wherein the shock absorber is mounted on the bottom of the frame and is located at least at both ends along the length of the frame; A fan unit is located at the bottom of the frame in the area between adjacent shock absorbers and can slide along the length or width of the frame. The fan unit has a fan mounting cavity for mounting the fan. The LRM module directly opposite the fan mounting cavity is the center LRM module, and the remaining LRM modules are edge LRM modules. The fan mounting cavity is connected to the heat dissipation teeth of the center LRM module through a vertical ventilation channel, and the fan mounting cavity is connected to the edge LRM modules through an inclined ventilation channel, so as to guide the airflow in the fan mounting cavity to the heat dissipation teeth of each LRM module to dissipate heat from each LRM module.

2. The LRM rack heat dissipation structure according to claim 1, characterized in that, The bottom surface of the rack is provided with a support plate, and the support plate is provided with a plurality of air outlets. At least one air outlet corresponds to a heat dissipation tooth of one LRM module. The air outlet corresponding to the heat dissipation teeth of the central LRM module is connected to the fan mounting cavity through a vertically arranged first air guide channel, and the air outlet corresponding to the heat dissipation teeth of the edge LRM module is connected to the fan mounting cavity through an inclined second air guide channel. The first air guide channel and the corresponding air outlet are connected to form the vertical ventilation duct, and the second air guide channel and the corresponding air outlet are connected to form the inclined ventilation duct.

3. The LRM rack heat dissipation structure according to claim 2, characterized in that, The second airflow channel includes a left second airflow channel and a right second airflow channel. The right side of the frame is provided with a zero-slot LRM module and a first-slot LRM module. Airflow baffles are provided at the bottom of the tray corresponding to the position of the zero-slot LRM module and at the bottom of the tray corresponding to the position of the first-slot LRM module. The ends of the two airflow baffles away from the tray are inclined towards the side closer to the fan mounting cavity. The right second airflow channel is formed between the two airflow baffles. The heat dissipation teeth of the zero-slot LRM module and the first-slot LRM module are close to each other and are connected to the right second airflow channel. The left side of the rack is provided with the last slot LRM module, and the LRM module immediately next to the last slot LRM module is the penultimate slot LRM module. The bottom of the tray is also provided with the air guide baffle at the position corresponding to the last slot LRM module and the bottom of the tray is also provided with the position corresponding to the penultimate slot LRM module. The end of the air guide baffle away from the tray is also inclined towards the side closer to the fan mounting cavity. The left second air guide channel is formed between the adjacent air guide baffles. The left second air guide channel is connected to the heat dissipation teeth of the last slot LRM module.

4. The LRM rack heat dissipation structure according to claim 3, characterized in that, The LRM module adjacent to the first slot LRM module is the second slot LRM module. The end of the air guide baffle at the bottom of the first slot LRM module is near the fan mounting cavity and is located on the extension line of the central axis of the heat dissipation teeth of the second slot LRM module. The air guide baffle located at the bottom of the penultimate slot LRM module, near the end of the fan mounting cavity, is on the extension line of the central axis of the heat dissipation teeth of the penultimate slot LRM module.

5. The LRM rack heat dissipation structure according to claim 4, characterized in that, The zeroth slot LRM module is the edge LRM module, the first slot LRM module is either the edge LRM module or the center LRM module, the second slot LRM module is the center LRM module, the last slot LRM module is the edge LRM module, and the penultimate slot LRM module is the center LRM module.

6. The LRM rack heat dissipation structure according to claim 1, characterized in that, The fan mounting cavity is also equipped with a control board, which is a long strip structure and located at the front end / back end of the fan mounting cavity.

7. The LRM rack heat dissipation structure according to claim 6, characterized in that, The aspect ratio of the control board is not less than 10:

1.

8. The LRM rack heat dissipation structure according to claim 3, characterized in that, A fan cover plate is provided on one end of the fan mounting cavity facing the LRM module. An air outlet is provided on the fan cover plate at a position corresponding to the fan. The first air guide channel and the second air guide channel are connected to the fan mounting cavity through the air outlet. The fan cover covers all the air outlets on the support plate, and the edges of the fan cover without the air outlets coincide with the leftmost and rightmost air guide baffles, respectively.

9. The LRM rack heat dissipation structure according to claim 8, characterized in that, The bottom of the frame is provided with two sets of sliding components. The two sets of sliding components are located at both ends of the frame in the length direction and extend along the width direction of the frame. The fan unit is slidably connected to the frame through the sliding components. The sliding assembly includes a guide rail and a fan cover plate. The guide rail is mounted on the bottom surface of the support plate and is slidably connected to the fan cover plate.

10. An electronic device, characterized in that, Includes the LRM rack heat dissipation structure as described in any one of claims 1 to 9.

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