Heat dissipation structure and grid-connected cabinet

Abstract

The utility model discloses a heat radiation structure and a grid-connected cabinet. The heat dissipation structure comprises a cabinet body and a heat dissipation main body. The cabinet body is provided with an inner cavity; the heat dissipation main body comprises a shell, a heat exchange core body and a first fan; the shell is connected to the cabinet body and is provided with a flow equalizing cavity; the heat exchange core is arranged in the shell and provided with a first air channel and a second air channel which are isolated from each other, the first air channel is provided with an air return sub-flow channel and an air blowing sub-flow channel, the air return sub-flow channel and the air blowing sub-flow channel both communicate with the inner cavity, and the flow equalizing cavity communicates between the air return sub-flow channel and the air blowing sub-flow channel. The inner cavity, the air return sub-flow channel, the flow equalizing cavity and the air blowing sub-flow channel are communicated in sequence and form a closed circulating flow channel together with the inner cavity; the air inlet end of the second air duct and the air outlet end of the second air duct are used for communicating with the outside of the shell and the outside of the inner cavity and are isolated from the inner cavity and the flow equalizing cavity. And the first fan is arranged on the circulating flow channel. The heat dissipation structure in the technical scheme of the utility model has a high protection level and a good heat dissipation effect on devices in the cabinet body.

Description

Technical Field

[0001] The utility model relates to the technical field of grid-connected cabinets, in particular to a heat dissipation structure and a grid-connected cabinet. Background Art

[0002] The heat dissipation technology solutions for the grid-connected cabinet of the wind power converter are mainly divided into two categories, one is water cooling and the other is direct air cooling. Water cooling is to use a water-cooled heat exchanger to transfer heat from the inside of the converter to the outside by using coolant driven by a water pump. With water cooling technology, the entire converter cabinet can be fully sealed to achieve a higher level of protection, but the cost of water cooling technology is high, the reliability is relatively poor, and there is a general risk of leakage, resulting in high maintenance costs throughout the life cycle. Traditional direct air cooling is a cooling method that forces air to pass through the surface of the heat dissipation device under the drive of the fan to take away the heat. Traditional direct air cooling usually directly exchanges heat between the external cold air and the hot air in the cabinet to achieve the heat dissipation effect, which easily allows external dust or rainwater to enter the cabinet, resulting in insufficient protection level of the cabinet and unable to meet the high protection requirements of dust and water. Utility Model Content

[0003] The main purpose of the utility model is to provide a heat dissipation structure, aiming to improve the protection level of the cabinet and improve the dustproof and waterproof performance.

[0004] To achieve the above-mentioned purpose, the heat dissipation structure proposed by the utility model includes a cabinet and a heat dissipation body; the cabinet has an inner cavity, the heat dissipation body includes a shell, a heat exchange core and a first fan, the shell is connected to the cabinet, and a flow equalization chamber is provided in the shell; the heat exchange core is arranged in the shell, and the heat exchange core has a first air duct and a second air duct isolated from each other, the first air duct has a return air sub-channel and a blowing sub-channel, the return air sub-channel and the blowing sub-channel are both connected to the inner cavity, the flow equalization chamber is connected between the return air sub-channel and the blowing sub-channel, and the inner cavity, the return air sub-channel, the flow equalization chamber and the blowing sub-channel are connected in sequence and form a closed circulation channel together; the air inlet end of the second air duct and the air outlet end of the second air duct are both used to connect to the outside of the shell and the outside of the inner cavity, and are isolated from the inner cavity and the flow equalization chamber; the first fan is arranged on the circulation channel to accelerate the gas flow rate.

[0005] In one embodiment, at least two return air sub-channels are provided, and the at least two return air sub-channels are respectively provided on two opposite sides of at least one blowing sub-channel.

[0006] In one embodiment, the flow equalizing cavity is formed between the side of the heat exchange core facing away from the cabinet and the shell.

[0007] In one embodiment, the first fan is connected to the first air duct via a connecting cavity.

[0008] In one embodiment, the heat dissipation structure further includes a second fan, and the second fan is connected to the second air duct.

[0009] In one embodiment, at least two heat exchange cores are disposed in the shell and spaced apart from each other, and at least one of the second fans is connected to the second air ducts of at least two adjacent heat exchange cores.

[0010] In one embodiment, the first air duct of each of the heat exchange cores is connected to at least two first fans, and at least two of the first fans are arranged along an air outlet direction perpendicular to the first fans;

[0011] And / or, the second air duct of each of the heat exchange cores is connected to at least two second fans, and at least two of the second fans are arranged along an air outlet direction perpendicular to the second fans and an air outlet direction perpendicular to the second air duct.

[0012] In one embodiment, the shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are both connected to the second air duct, and the air inlet is arranged perpendicularly or parallel to the direction of the air outlet.

[0013] The utility model also provides a grid-connected cabinet, comprising a heating device and the above-mentioned heat dissipation structure, wherein the heating device is arranged in the inner cavity and located in the circulation channel.

[0014] In one embodiment, in the blowing direction of the blowing sub-channel, at least the inner wall of the cabinet away from the blowing sub-channel forms a partial cavity wall of the inner cavity.

[0015] The technical solution of the utility model is that the heat exchange core is arranged in the shell, so that the shell has a protective effect on the heat exchange core. By connecting the shell with the cabinet, a flow equalization chamber is arranged in the shell, and the first air duct of the heat exchange core has a return air sub-channel and a blowing air sub-channel, and the return air sub-channel and the blowing air sub-channel are both connected to the inner cavity in the cabinet, and the flow equalization chamber is arranged between the return air sub-channel and the blowing air sub-channel and is connected to the return air sub-channel and the blowing air sub-channel, and the inner cavity, the return air sub-channel, the flow equalization chamber and the blowing air sub-channel are connected in sequence and form a closed circulation channel together, and the first fan is arranged on the circulation channel, so that the airflow in the inner cavity, the airflow in the flow equalization chamber and the airflow in the first air duct can be in the circulation channel. A circulating flow is formed in the channel, that is, the airflow in the inner cavity can enter the return air sub-channel section under the action of the first fan, and then perform the first heat exchange with the heat exchange core in the first duct, thereby achieving the effect of cooling the airflow entering the first duct for the first time, and then the airflow cooled by the heat exchange core once enters the flow-averaging cavity for equalization, and then enters the blowing sub-channel, so that the airflow and the heat exchange core perform a second heat exchange, and finally, under the action of the first fan, it is blown back to the inner cavity of the cabinet by the blowing sub-channel, thereby dissipating the heat of the heating device in the cabinet. Furthermore, the airflow driven by the first fan to blow into the inner cavity will return after passing through the inner wall of the inner cavity, and then be sucked into the first duct again under the suction of the first fan, so as to perform at least two heat exchanges with the heat exchange core again to be cooled, and the cooled airflow is blown to the inner cavity of the cabinet by the first fan again along the circulating channel... This cycle is repeated, achieving the effect of internal circulation of the airflow in the cabinet, reducing the risk of introducing dust, rainwater or other debris into the cabinet from the outside. Moreover, during one circulation of the airflow, it passes through the heat exchange core twice to exchange heat with the heat exchange core, thereby improving the heat exchange efficiency and enhancing the heat exchange effect. In addition, the heat exchange core is also provided with a second air duct that is isolated from the first air duct, the flow equalization cavity, and the inner cavity, and the second air duct is connected to the outside of the shell and the outside of the inner cavity, so that the cold air flow from the outside can also exchange heat with the heat exchange core, thereby ensuring that the temperature of the heat exchange core is low, so that the airflow introduced from the cabinet into the first air duct can be continuously cooled, ensuring a good heat dissipation effect inside the cabinet, and the second air duct is isolated from the first air duct and the inner cavity, which can reduce the risk of dust, rainwater or other debris entering the cabinet through the second air duct, ensuring that the heat dissipation structure has both a good heat dissipation effect and a high protection level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the internal structure of the first embodiment of the utility model power cabinet;

[0018] Figure 2 for Figure 1 A side view of an example of a heat dissipation structure;

[0019] Figure 3 for Figure 1 A side view of another example of the heat dissipation structure;

[0020] Figure 4 This is a schematic diagram of the internal structure of the second embodiment of the utility model power cabinet;

[0021] Figure 5 for Figure 4 A side view of an example of an upper portion of a heat dissipation structure;

[0022] Figure 6 for Figure 4 A side view of another example of the upper half of the heat dissipation structure;

[0023] Figure 7 for Figure 4 A side view of an example of the lower half of the heat dissipation structure;

[0024] Figure 8 for Figure 4 A side view of another example of the lower half of the heat dissipation structure;

[0025] Fig. 9 This is a schematic diagram of the internal structure of the third embodiment of the utility model power cabinet;

[0026] Fig.10 This is a schematic diagram of the internal structure of the fourth embodiment of the utility model power cabinet;

[0027] Fig.11 for Fig.10 A side view of an example of an upper portion of a heat dissipation structure;

[0028] Fig.12 for Fig.10 A side view of another example of the upper half of the heat dissipation structure;

[0029] Fig.13 for Fig.10 A side view of an example of the lower half of the heat dissipation structure;

[0030] Fig.14 for Fig.10 A side view of another example of the lower half of the heat dissipation structure;

[0031] Fig.15This is a schematic diagram of the internal structure of the fifth embodiment of the utility model power cabinet;

[0032] Fig.16 This is a schematic diagram of the internal structure of the sixth embodiment of the power-connected cabinet of the utility model.

[0033] Description of Figure Numbers:

[0034] Label name Label name 100 Cabinet 101 Inner cavity 200 Heat dissipation body 210 case 220 Heat exchange core 230 First fan 240 Second fan 201 Flow cavity 202 Connecting cavity 300 Heating device

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0039] The utility model provides a heat dissipation structure.

[0040] In this utility model technical solution, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16The heat dissipation structure includes a cabinet 100 and a heat dissipation body 200; the cabinet 100 is provided with an inner cavity 101; the heat dissipation body 200 includes a shell 210, a heat exchange core 220 and a first fan 230; the shell 210 is connected to the cabinet 100, and a flow balancing cavity 201 is provided in the shell 210; the heat exchange core 220 is arranged in the shell 210, and the heat exchange core 220 has a first air duct and a second air duct isolated from each other, and the first air duct has a return air sub-flow channel and a blowing air sub-flow channel, and the return air sub-flow channel The duct and the blowing sub-channel are both connected to the inner cavity 101, the equalizing chamber 201 is connected between the return air sub-channel and the blowing sub-channel, and the inner cavity, the return air sub-channel, the equalizing chamber 201 and the blowing sub-channel are connected in sequence and together form a closed circulation channel; the air inlet end of the second air duct and the air outlet end of the second air duct are both used to connect to the outside of the shell 210 and the outside of the inner cavity 101, and are isolated from the inner cavity 101 and the equalizing chamber 201; the first fan 230 is arranged on the circulation channel to accelerate the gas flow.

[0041] The cabinet 100 may be a cabinet 100 such as a power distribution cabinet or a power distribution cabinet that requires heat dissipation. In the technical solution of the present utility model, the heat dissipation body 200 is a device mainly used to dissipate heat for the cabinet 100. The heat dissipation body 200 includes a shell 210, which is connected to the cabinet 100, and a flow equalization chamber 201 is provided in the shell 210. The heat exchange core 220 is arranged in the shell 210 and has a first air duct, and the first air duct includes a return air sub-channel and a blowing air sub-channel. The return air sub-channel and the blowing air sub-channel are both connected to the inner cavity 101 of the cabinet 100. The inner cavity 101, the return air sub-channel, the flow equalization chamber and the blowing air sub-channel are connected in sequence and form a closed circulation channel together. The first fan 230 is arranged on the circulation channel, so that the airflow in the inner cavity 101 of the cabinet 100 can be sucked into the return air sub-channel under the suction force of the first fan 230, so that the airflow entering the return air sub-channel undergoes a first heat exchange with the heat exchange core 220, and the airflow after the first heat exchange is then The air flows into the flow-equalizing chamber 201, and then enters the blowing sub-channel to realize the second heat exchange after being evenly distributed in the flow-equalizing chamber 201, and then is blown toward the inner chamber 101 in the cabinet 100 under the action of the first fan 230, so as to dissipate the heat of the heating device 300 in the cabinet 100; then, the airflow blown toward the inner chamber 101 will be turned back when it hits the wall of the inner chamber 101, so as to continue to dissipate the heat of the heating device 300 again under the action of the first fan 230, and flow toward the first air channel of the heat exchange core 220 again, and then exchange heat with the heat exchange core 220 again, and then enter the heat exchange core 220 again for heat exchange after being evenly distributed through the flow-equalizing chamber 201, and finally flows toward the inner chamber 101 in the cabinet 100 under the action of the first fan 230... and so on, so as to realize the circulation effect of the airflow in the cabinet 100 and the airflow in the first air channel, so as to realize the good heat dissipation effect in the cabinet 100. In addition, in the process of the airflow passing through the inner cavity 101, the return air sub-channel, the flow-averaging cavity 201, the blowing sub-channel, and the inner cavity 101 in sequence, the airflow can be circulated once and heat exchanged at least twice, thereby improving the heat exchange efficiency and having a good heat exchange effect. It can be understood that in the circulation process, since the airflow of the inner cavity 101 of the cabinet 100 only enters the shell 210 and then enters the inner cavity 101 of the cabinet 100 under the drive of the first fan 230 through at least two heat exchanges of the heat exchange core 220, the first air duct may not be connected to the outside, that is, the circulation of the airflow in the cabinet 100 is carried out in a closed environment, so that a good sealing effect can be achieved for the devices in the cabinet 100, the protection level of the cabinet 100 is improved, and dust or rainwater is prevented from entering the cabinet 100 and affecting the devices in the cabinet 100. The shell 210 can be fully connected to the outside of the cabinet 100, or partially arranged in the cabinet 100. The shell 210 and the cabinet 100 may be connected by screws, snap-fit ​​connections, or welding.

[0042] Specifically, the return air sub-channel in the first air duct may be in a straight line, L-shaped, U-shaped or S-shaped, etc. The blowing air sub-channel in the first air duct may also be in a straight line, L-shaped, U-shaped or S-shaped, etc. The first fan 230 may be arranged in the return air sub-channel, the air inlet end of the return air sub-channel, the air outlet end of the return air sub-channel, the flow balancing cavity, the blowing air sub-channel, the air inlet end of the blowing air sub-channel, the air outlet end of the blowing air sub-channel and the inner cavity 101. For example, when the first air duct is composed of a plurality of parallel straight-line channels, one end of the straight-line channel may be close to the inner cavity 101 of the cabinet 100, and the other end may be away from the inner cavity 101 of the cabinet 100; the first fan 230 may correspond to some ports of the plurality of straight-line channels close to one end of the inner cavity 101 of the cabinet 100, so that the flow channel corresponding to the partial port in the first air duct forms a blowing sub-flow channel, and the flow channel of the plurality of straight-line channels close to one end of the inner cavity 101 of the cabinet 100 that does not correspond to the first fan 230 is a return air sub-flow channel, thereby achieving the effect that the first air duct is connected to the inner cavity 101 and forms a closed circulation flow channel together with the inner cavity 101. When the first air duct is L-shaped, U-shaped or S-shaped, both ports of the first air duct are connected to the cabinet 100, and the first fan 230 may be arranged at the air inlet end of the first air duct or the air outlet end of the first air duct. In addition, the shape of the flow equalization cavity 201 may be a straight line, a bend or an arc. The flow-distributing cavity 201, the return air sub-channel and the blowing air sub-channel can form a straight-line channel, an L-shaped channel, a U-shaped channel or an S-shaped channel, etc. The flow-distributing cavity 201 can be formed by the inner wall of the shell 210 and the wall surface of the heat exchange core, or it can be an independent pipe structure.

[0043] In order to ensure that the heat exchange core 220 can always cool the airflow blown out from the cabinet 100, the heat exchange core 220 in the technical solution of the utility model also includes a second air duct. By connecting the air inlet and air outlet ends of the second air duct to the outside of the shell 210 and the outside of the cabinet 100, the external cold air can enter the second air duct to cool the heat exchange core 220, thereby achieving a good heat dissipation effect of the heat exchange core 220, ensuring that the heat exchange core 220 can continuously cool the airflow blown out from the cabinet 100, so as to further blow the airflow cooled by the heat exchange core 220 back into the cabinet 100 through the first fan 230, thereby achieving a good heat dissipation effect on the devices in the cabinet 100. In addition, the second air duct is isolated from the first air duct, the inner cavity 101 and the flow equalization cavity 201, so that the risk of dust or rainwater entering the first air duct or the flow equalization cavity 201 through the second air duct and then blowing the dust or rainwater into the inner cavity of the cabinet 100 through the first fan 230 can be avoided; or dust or rainwater can be avoided from directly entering the inner cavity 101 of the cabinet 100. Specifically, the airflow through the second air duct can be a natural airflow, or a second fan 240 can be arranged in the shell 210, so that the second fan 240 is connected to the air inlet end of the second air duct or the air outlet end of the second air duct, so that under the drive of the second fan 240, the cold air at the air inlet end of the second air duct passes through the heat exchange core 220, and the heat of the heat exchange core 220 is blown out of the shell 210 and the cabinet 100 from the air outlet end of the second air duct. In one example, the first air duct and the second air duct may both be linear, the first air duct and the second air duct may be arranged vertically, or the first air duct and the second air duct may be arranged at an acute angle or an obtuse angle, so as to avoid the risk of the second air duct being connected to the interior of the cabinet 100. For example, the first air duct may be in a horizontal direction, and the second air duct may extend in a direction at an acute angle or an obtuse angle to the horizontal direction; or the first air duct may be in a horizontal direction, and the second air duct may be in a vertical direction. Of course, the first air duct may not be linear, for example, the first air duct may be L-shaped or S-shaped, etc., as long as the first air duct can be connected to the interior of the cabinet 100.

[0044] The technical solution of the utility model is that the heat exchange core 220 is arranged in the shell 210, so that the shell 210 has a protective effect on the heat exchange core 220. By connecting the shell 210 with the cabinet 100, a flow equalization chamber 201 is arranged in the shell 210, and the first air duct of the heat exchange core 220 has a return air sub-channel and a blowing air sub-channel, and the return air sub-channel and the blowing air sub-channel are both connected to the inner cavity 101 in the cabinet 100, and the flow equalization chamber 201 is arranged between the return air sub-channel and the blowing air sub-channel and is connected to the return air sub-channel and the blowing air sub-channel, and the inner cavity 101, the return air sub-channel, the flow equalization chamber 201 and the blowing air sub-channel are connected in sequence and form a closed circulation channel together, and the first fan 230 is arranged on the circulation channel, so that the airflow in the inner cavity 101, the airflow in the flow equalization chamber 201 and the airflow in the first air duct can be in the circulation channel. A circulating flow is formed in the circulation flow channel, that is, the airflow in the inner cavity 101 can enter the return air sub-flow channel section under the action of the first fan 230, and then perform the first heat exchange with the heat exchange core 220 in the first air duct, thereby achieving the effect of first cooling the airflow entering the first air duct, and then the airflow cooled once by the heat exchange core 220 enters the uniform flow cavity 201 for uniform wind, and then enters the blowing sub-flow channel, so that the airflow and the heat exchange core 220 undergo a second heat exchange, and finally, under the action of the first fan 230, it is blown back to the inner cavity 101 of the cabinet 100 through the blowing sub-flow channel, thereby dissipating the heat of the heating device 300 in the cabinet 100. Furthermore, the airflow driven by the first fan 230 to blow into the inner cavity 101 will be turned back after passing through the inner wall of the inner cavity 101, and then sucked into the first air duct again under the suction of the first fan 230, so as to exchange heat with the heat exchange core 220 at least twice again to be cooled, and the cooled airflow is blown into the inner cavity 101 of the cabinet 100 by the first fan 230 again along the circulation channel... This cycle is repeated, achieving the effect of internal circulation of the airflow in the cabinet 100, reducing the risk of introducing dust, rainwater or other debris from the outside into the cabinet 100. In addition, during the circulation of the airflow, it passes through the heat exchange core 220 twice to exchange heat with the heat exchange core 220, thereby improving the heat exchange efficiency and enhancing the heat exchange effect. In addition, the heat exchange core 220 is also provided with a second air duct which is isolated from the first air duct, the flow equalizing chamber 201 and the inner cavity 101, and the second air duct is connected to the outside of the shell 210 and the outside of the inner cavity 101, so that the cold air flow from the outside can also exchange heat with the heat exchange core 220, thereby ensuring that the temperature of the heat exchange core 220 is low, so as to be able to continuously cool the air flow introduced from the cabinet 100 into the first air duct, and ensure a good heat dissipation effect inside the cabinet 100, and the second air duct is isolated from the first air duct and from the inner cavity 101, which can reduce the risk of dust, rainwater or other debris entering the cabinet 100 through the second air duct, thereby ensuring that the heat dissipation structure has both good heat dissipation effect and a high protection level.

[0045] In one embodiment, at least two return air sub-flow channels are provided, and the at least two return air sub-flow channels are respectively provided on two opposite sides of at least one blowing air sub-flow channel.

[0046] With such an arrangement, the airflow from the blowing sub-channel to the inner cavity 101 can continue to be split in two opposite directions to further flow to at least two return air sub-channels respectively under the action of the first fan, thereby increasing the heat dissipation area and further improving the heat dissipation efficiency.

[0047] Further, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16 A flow equalizing cavity 201 is formed between the side of the heat exchange core 220 facing away from the cabinet 100 and the shell 210 .

[0048] By forming a flow balancing cavity 201 between the side of the heat exchange core 220 facing away from the cabinet 100 and the shell 210, the shell 210 serves as a part of the air duct wall of the first air duct, thereby saving materials.

[0049] Of course, it is understandable that in other embodiments, if material cost and installation cost are not considered, the flow equalizing chamber 201 can also be a separately arranged shell structure, which is installed in the shell 210 and is independent of the shell 210.

[0050] In one embodiment, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16 The first fan 230 is connected to the first air duct through the connecting cavity 202.

[0051] Specifically, the first fan 230 can be located inside the cabinet 100 or outside the cabinet 100. The first fan 230 can be located at the air inlet side of the first air duct or at the air outlet side of the first air duct. By connecting the first fan 230 and the first air duct through the connecting cavity 202, the airflow is first collected by the connecting cavity 202 and then blown out by the first fan 230, so as to achieve a better blowing effect.

[0052] In one embodiment, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16 The heat dissipation structure also includes a second fan 240, and the second fan 240 is connected to the second air duct.

[0053] By providing a second fan 240, and connecting the second fan 240 to the second air duct, the second fan 240 can drive external cold air to enter the shell 210 through the second air duct, and blow the hot air in the shell 210 out of the shell 210 under the driving action of the second fan 240, thereby accelerating the flow efficiency of the airflow and improving the heat dissipation effect of the heat exchange core 220.

[0054] Specifically, the second fan 240 may be disposed at the air inlet end of the second air duct, the air outlet end of the second air duct, or the second fan 240 may be disposed in the second air duct.

[0055] Further, please refer to Figures 1 to 3 At least two heat exchange cores 220 are disposed at intervals in the shell 210, and at least one second fan 240 is connected to the second air ducts of at least two adjacent heat exchange cores 220.

[0056] By connecting at least one second fan 240 to the second air ducts of two adjacent heat exchange cores 220, the airflow in the second air ducts of the two adjacent heat exchange cores 220 can flow simultaneously under the drive of the same second fan 240, so as to improve the heat dissipation efficiency, and at the same time save the number of second fans 240 and reduce the material cost. Specifically, in one example, one second fan 240 can be connected to the second air ducts of two adjacent heat exchange cores 220. Or, in another example, at least two second fans 240 are arranged between two adjacent heat exchange cores 220, and each second fan 240 is connected to the second air ducts of the two adjacent heat exchange cores 220.

[0057] Of course, in other embodiments, please refer to Figures 4 to 16 The second air ducts of different heat exchange cores 220 may be connected to different second fans 240 , so that the number of second fans 240 is the same as the number of heat exchange cores 220 , or the number of second fans 240 is a multiple of the number of heat exchange cores 220 .

[0058] For details, please refer to Figure 5 , Figure 7 , Fig.11 as well as Fig.13 , one heat exchange core 220 corresponds to one second fan 240. Alternatively, please refer to Figure 6 , Figure 8 , Fig.12 as well as Fig.14, one heat exchange core 220 corresponds to at least two second fans 240. It can be understood that when the power of the device in the cabinet 100 is large and the heat is high, the heat exchange core 220 can use a core with a larger heat exchange area, so that the number of second air ducts in the heat exchange core 220 or the size of the second air duct is larger. At this time, one heat exchange core 220 can correspond to at least two second fans 240.

[0059] Further, please refer to Figure 6 , Figure 8 , Fig.12 as well as Fig.14 The second air duct of each heat exchange core 220 is connected to at least two second fans 240, and the at least two second fans 240 are arranged along an air outlet direction perpendicular to the second fans 240 and perpendicular to the air outlet direction of the second air duct.

[0060] In this way, at least two second fans 240 can be arranged in parallel rather than in series, so that at least two second fans 240 can simultaneously drive the airflow in the second air duct, thereby increasing the airflow rate and improving the heat exchange efficiency. Specifically, the second air duct can be straight or curved.

[0061] In one example, when the second air duct is straight, the air outlet direction of the second fan 240 may be the same as the air outlet direction of the second air duct. When the arrangement direction of at least two second fans 240 is arranged along a direction perpendicular to the air outlet direction of the second fan 240, it means that the arrangement direction of at least two second fans 240 is arranged along a direction perpendicular to the air outlet direction of the second air duct.

[0062] In another example, when the second air duct is bent in an L-shape and the second fan 240 is close to the air inlet end of the second air duct, the air outlet direction of the second fan 240 and the air outlet direction of the second air duct can be perpendicular to each other. By setting the arrangement direction of at least two second fans 240 to be perpendicular to both the air outlet direction of the second fan 240 and the air outlet direction of the second air duct, the air flow rate can be increased, thereby improving the heat exchange efficiency.

[0063] In another example, when the second air duct is bent in an L-shape and the second fan 240 is close to the air outlet end of the second air duct, the air outlet direction of the second fan 240 may be the same as the air outlet direction of the second air duct. When the arrangement direction of at least two second fans 240 is arranged perpendicular to the air outlet direction of the second fan 240, it means that the arrangement direction of at least two second fans 240 is arranged perpendicular to the air outlet direction of the second air duct.

[0064] Similarly, please refer to Figure 5 , Figure 7 , Fig.11 as well as Fig.13, one heat exchange core 220 can correspond to one first fan 230. Alternatively, please refer to Figure 6 , Figure 8 , Fig.12 as well as Fig.14 , one heat exchange core 220 can also be configured to correspond to at least two first fans 230 .

[0065] Further, please refer to Figure 6 , Figure 8 , Fig.12 as well as Fig.14 The first air duct of each heat exchange core 220 is connected to at least two first fans 230 , and the at least two first fans 230 are arranged along an air outlet direction perpendicular to the first fans 230 .

[0066] With such an arrangement, at least two first fans 230 are arranged in parallel rather than in series, so that at least two first fans 230 can simultaneously drive the airflow in the first air duct, thereby increasing the airflow rate and improving the heat dissipation efficiency of the inner cavity 101 of the cabinet 100 and the components in the inner cavity 101.

[0067] In one embodiment, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.15 and Fig.16 The shell 210 is provided with an air inlet and an air outlet, both of which are connected to the second air duct, and the direction of the air inlet is perpendicular to the direction of the air outlet.

[0068] For example, when the housing 210 is connected to the left side wall of the cabinet 100, the heat exchange core 220 is arranged on the left side of the cabinet 100, that is, the flow direction of the airflow from the first air duct to the inner cavity 101 of the cabinet 100 is to the right. The air inlet direction of the second air duct can be set to an upward or downward direction. At this time, the air inlet of the housing 210 is opened on the bottom wall or the top wall of the housing 210. When the air outlet of the housing 210 is connected to the second air duct, the air outlet of the housing 210 can be opened on the side away from the cabinet 100, that is, the air outlet of the housing 210 is opened on the left side wall of the housing 210. When the second fan 240 is arranged on the air outlet side of the second air duct, the second fan 240 can be arranged on the side wall of the housing 210 away from the cabinet 100 and connected to the air outlet.

[0069] With such a configuration, the airflow passing through the second air duct can be directed away from the cabinet 100 , so that the hot airflow blown out from the housing 210 has less influence on the cabinet 100 .

[0070] In another embodiment, if Fig.10As shown, the shell 210 is provided with an air inlet and an air outlet, both of which are connected to the second air duct, and the direction of the air inlet is parallel to the direction of the air outlet.

[0071] For example, the air inlet and the air outlet can be respectively opened on the top wall and the bottom wall of the shell 210, or the air inlet and the air outlet can be respectively opened on the bottom wall and the top wall of the shell 210, so that the air outlet direction of the airflow passing through the second air duct is the same as the air inlet direction, thereby shortening the air flow path and improving the heat dissipation efficiency of the heat exchange core 220.

[0072] The utility model also proposes a grid-connected cabinet, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16 The grid-connected cabinet includes a heating device 300 and a heat dissipation structure. The specific structure of the heat dissipation structure refers to the above embodiment. Since the grid-connected cabinet adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The heating device 300 is arranged in the inner cavity 101 and is located in the circulation channel.

[0073] In this way, the airflow cooled by the heat exchange core 220 can be directly blown to the heating device 300, and then the heating device 300 can be specifically cooled to achieve a better cooling effect. Specifically, the heating device 300 can include a circuit breaker, a contactor, and the like.

[0074] Further, please refer to Figure 1 , Figure 4 , Fig. 9 , Fig.10 , Fig.15 as well as Fig.16 In the blowing direction of the blowing sub-channel, at least the inner wall of the cabinet 100 away from the blowing sub-channel forms a partial cavity wall of the inner cavity 101.

[0075] With such a configuration, the airflow from the first air duct to the inner cavity 101 can actually flow into the cabinet 100, so that the airflow turns back after hitting the inner wall of the cabinet 100, thereby extending the path of the airflow to dissipate heat in more areas of the cabinet 100, achieving a good heat dissipation effect and improving the heat dissipation efficiency. In addition, such a configuration also reduces material costs and installation costs.

[0076] Of course, in other embodiments, a separate shell structure may also be provided in the cabinet 100 to form the inner cavity 101 .

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat dissipation structure, characterized in that: include: A cabinet body, wherein an inner cavity is provided in the cabinet body; and A heat dissipation body, the heat dissipation body comprising: A shell, the shell is connected to the cabinet, and a flow balancing cavity is provided in the shell; A heat exchange core, the heat exchange core is arranged in the shell, the heat exchange core has a first air duct and a second air duct isolated from each other, the first air duct has a return air sub-flow channel and a blowing air sub-flow channel, the return air sub-flow channel and the blowing air sub-flow channel are both connected to the inner cavity, the flow balancing cavity is connected between the return air sub-flow channel and the blowing air sub-flow channel, and the inner cavity, the return air sub-flow channel, the flow balancing cavity and the blowing air sub-flow channel are connected in sequence and together form a closed circulation flow channel; the air inlet end and the air outlet end of the second air duct are both used to connect to the outside of the shell and the outside of the inner cavity, and are isolated from the inner cavity and the flow balancing cavity; and The first fan is arranged on the circulation channel to accelerate the gas flow rate.

2. The heat dissipation structure according to claim 1, characterized in that: There are at least two return air sub-flow channels, and the at least two return air sub-flow channels are respectively arranged on two opposite sides of at least one blowing sub-flow channel.

3. The heat dissipation structure according to claim 2, characterized in that: The flow equalizing cavity is formed between the side of the heat exchange core facing away from the cabinet and the shell.

4. The heat dissipation structure according to claim 1, characterized in that: The first fan is connected to the first air duct via a connecting cavity.

5. The heat dissipation structure according to claim 1, characterized in that: The heat dissipation structure also includes a second fan, and the second fan is connected to the second air duct.

6. The heat dissipation structure according to claim 5, characterized in that: At least two heat exchange cores are arranged at intervals in the shell, and at least one of the second fans is connected to the second air ducts of at least two adjacent heat exchange cores.

7. The heat dissipation structure according to claim 5, characterized in that: The first air duct of each of the heat exchange cores is connected to at least two first fans, and the at least two first fans are arranged along an air outlet direction perpendicular to the first fans; And / or, the second air duct of each of the heat exchange cores is connected to at least two second fans, and at least two of the second fans are arranged along an air outlet direction perpendicular to the second fans and an air outlet direction perpendicular to the second air duct.

8. The heat dissipation structure according to any one of claims 1 to 7, characterized in that: The shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are both connected to the second air duct, and the air inlet is arranged perpendicularly or parallel to the air outlet.

9. A grid-connected cabinet, characterized in that: It comprises a heating device and a heat dissipation structure as claimed in any one of claims 1 to 8, wherein the heating device is arranged in the inner cavity and located in the circulation channel.

10. The grid-connected cabinet according to claim 9, characterized in that: In the blowing direction of the blowing sub-channel, at least the inner wall of the cabinet away from the blowing sub-channel forms a part of the cavity wall of the inner cavity.

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