Internal circulation type air cooling power supply

Abstract

The utility model discloses an internal circulation type air cooling power supply, which comprises a shell, a heat exchange assembly, a power module and a heat dissipation fan, and is characterized in that the shell is provided with a closed inner cavity and a heat conduction wall, the heat conduction wall forms the cavity wall of the closed inner cavity, and the closed inner cavity is internally provided with a first heat exchange air duct; the heat exchange assembly comprises a first heat exchange part and a second heat exchange part, the second heat exchange part is in heat conduction connection with the heat conduction wall and forms a second heat exchange air duct, the second heat exchange air duct communicates with the first heat exchange air duct, and the first heat exchange part is in heat conduction connection with the heat conduction wall; the power module forms a heat dissipation air duct, one end of the heat dissipation air duct communicates with the first heat exchange air duct, the other end communicates with one end, away from the first heat exchange air duct, of the second heat exchange air duct, and the heat dissipation air duct, the first heat exchange air duct and the second heat exchange air duct form a circulating air duct; the cooling fan is used for driving airflow to circularly flow along the circulating air duct. According to the technical scheme of the utility model, the internal circulation type air-cooled power supply can realize heat dissipation and improve the waterproof performance at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of power conversion, in particular to an internal circulation air-cooled power supply. Background Art

[0002] A power converter is a power supply that can convert the input signal of one power supply into the output signal of another power supply, thereby obtaining different voltages and currents. During the use of the power converter, a large amount of heat will be generated, and a heat dissipation structure is usually set. At present, in the air-cooling heat dissipation solution, the heat dissipation method of exchanging the heat dissipation duct in the power converter with the external air flow is generally adopted. However, this heat dissipation method is not convenient for use in outdoor environments. Even if the circuit in the power converter is waterproofed, it is easy to cause water ingress failure in the power supply. Utility Model Content

[0003] The main purpose of the utility model is to provide an internal circulation air-cooled power supply, aiming to achieve heat dissipation while improving waterproof and dustproof performance.

[0004] To achieve the above-mentioned purpose, the internal circulation air-cooled power supply proposed by the utility model comprises:

[0005] The housing is provided with a closed inner cavity and a heat-conducting wall, wherein the heat-conducting wall constitutes a cavity wall of the closed inner cavity, and the closed inner cavity has a first heat exchange air duct;

[0006] The heat exchange assembly comprises a first heat exchange element and a second heat exchange element, wherein the second heat exchange element is connected to the heat-conducting wall by thermal conduction and forms a second heat exchange air duct, one end of the second heat exchange air duct is connected to the first heat exchange air duct, and the first heat exchange element is arranged in the first heat exchange air duct and is connected to the heat-conducting wall by thermal conduction;

[0007] a power module disposed in the closed inner cavity, wherein the power module is formed with a heat dissipation duct, wherein one end of the heat dissipation duct is connected to the first heat exchange duct, and the other end of the heat dissipation duct is connected to an end of the second heat exchange duct away from the first heat exchange duct, and the heat dissipation duct, the first heat exchange duct and the second heat exchange duct form a circulation duct; and

[0008] The heat dissipation fan is arranged in the circulating air duct and is used to drive the air flow to circulate along the circulating air duct.

[0009] Optionally, the first heat exchange component includes a heat-conducting seat and a plurality of first heat sinks arranged on the heat-conducting seat, the heat-conducting seat is thermally connected to the heat-conducting wall, the plurality of first heat sinks are spaced apart in a direction perpendicular to the heat-conducting wall, and all extend along the length direction of the first heat exchange air duct, and the plurality of first heat sinks are spaced apart from each other on a side close to the power module to form an air inlet gap.

[0010] Optionally, the thermal seat includes a base plate and a back plate, the base plate is mounted on the thermal wall, the back plate is connected to a side of the base plate away from the power module, and the first heat sinks are connected to a side of the back plate facing the power module.

[0011] Optionally, the second heat exchange member includes a heat-conducting tube and a plurality of second heat sinks arranged in the heat-conducting tube, the heat-conducting tube has a mounting plane, the heat-conducting tube is mounted on the heat-conducting wall through the mounting plane, and the plurality of second heat sinks are distributed in sequence along the thickness direction of the heat-conducting tube.

[0012] Optionally, the power module includes a shell and a circuit assembly, the heat dissipation duct is formed in the shell, and the circuit assembly is arranged in the heat dissipation duct.

[0013] Optionally, the internal circulation air-cooled power supply includes a plurality of the power modules and a plurality of the second heat exchange elements, the plurality of power modules are arranged in sequence along the length direction of the first heat exchange duct, and are all connected to the first heat exchange duct, a second heat exchange element is provided next to each power module, and the second heat exchange ducts of the plurality of the second heat exchange elements are all connected to the first heat exchange duct.

[0014] Optionally, a return air duct is formed between the side of the power module facing away from the first heat exchange air duct and the shell, and the return air duct connects the heat dissipation air duct of the corresponding power module and the second heat exchange air duct of the adjacent second heat exchange element, and two adjacent return air ducts are separated by a partition.

[0015] Optionally, the internal circulation air-cooled power supply further includes a heat dissipation structure, which is disposed on a side of the heat-conducting wall away from the closed inner cavity and is thermally connected to the heat-conducting wall.

[0016] Optionally, the power module includes a MOS tube, the internal circulation air-cooled power supply includes a third heat exchange element, the third heat exchange element is arranged in the heat dissipation air duct, and the MOS tube is thermally connected to the third heat exchange element.

[0017] Optionally, the internal circulation air-cooled power supply further includes an air supply fan, which is disposed on a side of the heat-conducting wall away from the closed inner cavity and is disposed toward the heat dissipation structure.

[0018] The internal circulation air-cooled power supply of the technical solution of the utility model is provided with a closed inner cavity and a heat-conducting wall in the outer shell, the heat-conducting wall constitutes the cavity wall of the closed inner cavity, a first heat exchange duct is provided in the closed inner cavity, the heat exchange component is provided with a first heat exchange element and a second heat exchange element, the second heat exchange element is thermally connected to the heat-conducting wall to form a second heat exchange duct, one end of the second heat exchange duct is communicated with the first heat exchange duct, the first heat exchange element is arranged in the first heat exchange duct and is thermally connected to the heat-conducting wall, the power module is arranged in the closed inner cavity to form a heat dissipation duct, one end of the heat dissipation duct is communicated with the first heat exchange duct, and the other end is communicated with an end of the second heat exchange duct away from the first heat exchange duct, so that the heat dissipation duct, the first heat exchange duct and the second heat exchange duct form a circulation duct, and a heat dissipation fan for driving the airflow to flow along the circulation duct is arranged in the circulation duct. In this way, the airflow blown by the heat dissipation fan can circulate in the heat dissipation duct, the first heat exchange duct and the second heat exchange duct. When the airflow flows to the first heat exchange duct, the first heat exchange element can receive the heat in the airflow and transfer the heat to the heat conduction wall for heat exchange. When the airflow flows to the second heat exchange duct, the second heat exchange element can absorb the heat in the airflow and then transfer the absorbed heat to the heat conduction wall for heat exchange, thereby increasing the heat exchange area of ​​the hot air flow and improving the heat dissipation efficiency. Moreover, when heat is dissipated in this way, the airflow in the heat dissipation duct does not need to exchange with the external airflow for heat dissipation, which can prevent the external airflow from entering the closed inner cavity, thereby preventing the external water vapor, liquid, etc. from entering the closed inner cavity, thereby achieving heat dissipation while also improving the waterproof and dustproof performance of the internal circulation air-cooled power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of an internal circulation air-cooled power supply of the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional view of the internal circulation air-cooled power supply;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 for Figure 1 A cross-sectional view of the internal circulation air-cooled power supply from another perspective;

[0024] Figure 5 for Figure 1 Partial structural diagram of the internal circulation air-cooled power supply;

[0025] Figure 6 for Figure 1 Schematic diagram of the partial structure of the internal circulation air-cooled power supply.

[0026] Description of Figure Numbers:

[0027] 10. Shell; 11. Closed inner cavity; 12. Heat-conducting wall; 13. First heat exchange air duct; 14. Return air duct; 20. Heat dissipation structure; 21. Bottom plate; 22. Third heat sink; 23. Mounting shell; 24. Heat dissipation channel; 30. Power module; 31. Heat dissipation air duct; 32. Shell; 33. Circuit assembly; 331. MOS tube; 40. Second heat exchange element; 41. Second heat exchange air duct; 42. Heat-conducting cylinder; 43. Second heat sink; 50. Heat dissipation fan; 55. Air supply fan; 60. Partition; 70. First heat exchange element; 71. Second heat sink; 72. Heat-conducting seat; 90. Third heat exchange element; 91. Heat-conducting plate; 92. Fourth heat sink

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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 implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. 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.

[0032] The utility model provides an internal circulation air-cooled power supply for intelligent charging.

[0033] In the embodiment of the present utility model, Figures 1 to 6 As shown, the internal circulation air-cooled power supply includes a housing 10 , a heat exchange component, a power module 30 and a heat dissipation fan 50 .

[0034] The housing 10 is provided with a closed inner cavity 11 and a heat-conducting wall 12, wherein the heat-conducting wall 12 constitutes the cavity wall of the closed inner cavity 11, and the closed inner cavity 11 has a first heat exchange air duct 13; the heat exchange assembly includes a first heat exchange element 70 and a second heat exchange element 40, wherein the second heat exchange element 40 is connected to the heat-conducting wall 12 by thermal conduction, and forms a second heat exchange air duct 41, wherein one end of the second heat exchange air duct 41 is connected to the first heat exchange air duct 13, and the first heat exchange element 70 is provided in the first heat exchange air duct 13 and communicates with the heat-conducting wall 12. The heat wall 12 is thermally connected; the power module 30 is arranged in the closed inner cavity 11, and the power module 30 forms a heat dissipation duct 31. One end of the heat dissipation duct 31 is connected to the first heat exchange duct 13, and the other end is connected to the end of the second heat exchange duct 41 away from the first heat exchange duct 13. The heat dissipation duct 31, the first heat exchange duct 13 and the second heat exchange duct 41 form a circulation duct; the heat dissipation fan 50 is arranged in the circulation duct to drive the airflow to circulate along the circulation duct.

[0035] During specific use, the heat dissipation fan 50 blows air toward the heat dissipation duct 31, blows the hot air flow in the heat dissipation duct 31 to the first heat exchange duct 13 for heat exchange, and then flows into the second heat exchange duct 41 for heat exchange. The airflow after heat exchange returns to the heat dissipation duct 31. When the airflow flows in the first heat exchange duct 13, the heat in the airflow can be absorbed by the first heat exchange element 70, and the first heat exchange element 70 conducts the absorbed heat to the heat conduction wall 12 for heat exchange. The heat conduction wall 12 is contacted with the external airflow on the other side to dissipate heat, thereby realizing cyclic heat dissipation. Different from the above-mentioned airflow circulation method, in another circulation method, the heat dissipation fan 50 blows the airflow from the heat dissipation duct 31 to the second heat exchange channel for heat exchange, and then flows into the first heat exchange duct 13 for heat exchange, and then flows into the heat dissipation duct 31 to realize cyclic heat dissipation.

[0036] The internal circulation air-cooled power supply of the technical solution of the utility model is provided with a closed inner cavity 11 and a heat-conducting wall 12 in the housing 10, the heat-conducting wall 12 constitutes the cavity wall of the closed inner cavity 11, and a first heat exchange air duct 13 is provided in the closed inner cavity 11, and the heat exchange component is provided with a first heat exchange element 70 and a second heat exchange element 40, the second heat exchange element 40 is connected with the heat-conducting wall 12 by thermal conduction, and forms a second heat exchange air duct 41, one end of the second heat exchange air duct 41 is connected with the first heat exchange air duct 13, and the first heat exchange element 70 is provided with The power module 30 is arranged in the closed inner cavity 11 in the first heat exchange air duct 13 and is thermally connected to the heat conduction wall 12, and a heat dissipation air duct 31 is formed. One end of the heat dissipation air duct 31 is connected to the first heat exchange air duct 13, and the other end is connected to an end of the second heat exchange air duct 41 away from the first heat exchange air duct 13, so that the heat dissipation air duct 31, the first heat exchange air duct 13 and the second heat exchange air duct 41 form a circulation air duct, and a heat dissipation fan 50 is arranged in the circulation air duct to drive the air flow to flow along the circulation air duct. In this way, the airflow blown by the heat dissipation fan 50 can circulate in the heat dissipation duct 31, the first heat exchange duct 13 and the second heat exchange duct 41. When the airflow flows to the first heat exchange duct 13, the first heat exchange element 70 can receive the heat in the airflow and transfer the heat to the heat conduction wall 12 for heat exchange. When the airflow flows to the second heat exchange duct 41, the second heat exchange element 40 can absorb the heat in the airflow and then transfer the absorbed heat to the heat conduction wall 12 for heat exchange, thereby increasing the heat exchange area of ​​the hot airflow and improving the heat dissipation efficiency. Moreover, when heat is dissipated in this way, the airflow in the heat dissipation duct 31 does not need to exchange with the external airflow for heat dissipation, which can prevent the external airflow from entering the closed inner cavity 11, thereby preventing the external water vapor, liquid, etc. from entering the closed inner cavity 11, thereby achieving heat dissipation while also improving the waterproof and dustproof performance of the internal circulation air-cooled power supply.

[0037] In some embodiments, the first heat exchange member 70 includes a heat conductive seat 72 and a plurality of first heat sinks 71 disposed on the heat conductive seat 72. The heat conductive seat 72 is thermally connected to the heat conductive wall 12. The plurality of first heat sinks 71 are spaced apart in a direction perpendicular to the heat conductive wall 12 and extend along the length direction of the first heat exchange air duct 13. The plurality of first heat sinks 71 are spaced apart from each other on one side close to the power module 30 to form an air inlet gap.

[0038] Specifically, when installing the first heat exchange component 70, first install multiple first heat sinks 71 on the heat conductive seat 72, and then install the heat conductive seat 72 with the first heat sink 71 installed in the first heat exchange air duct 13 and connect it to the heat conductive wall 12 for thermal conduction. In this way, there is no need to install the first heat sink 71 separately, thereby reducing the difficulty of installing the first heat sink 71.

[0039] When the airflow blown by the heat dissipation fan 50 passes through the first heat exchange air duct 13, the airflow flows into the air inlet gap formed between two adjacent first heat sinks 71, which can increase the heat conduction area of ​​the first heat exchange element 70, and in this way, the airflow blown by the heat dissipation fan 50 can be received by multiple first heat sinks 71 at the same time, and after absorbing the heat in the airflow, the heat is transferred to the heat conduction seat 72, and then the heat conduction seat 72 transfers the heat to the heat conduction wall 12, thereby increasing the heat conduction area and improving the heat dissipation efficiency. Among them, the multiple first heat sinks 71 include but are not limited to two, three, four or more. Optionally, the first heat sink 71 can be arranged to be spaced and distributed in a direction parallel to the heat conduction wall 12.

[0040] Different from the above-mentioned installation method of the plurality of first heat sinks 71 , in another embodiment, the plurality of first heat sinks 71 are directly connected to the heat conducting wall 12 by thermal conduction.

[0041] In some embodiments, the thermal seat 72 includes a base plate 21 and a back plate, the base plate 21 is installed on the thermal wall 12, the back plate is connected to the side of the base plate 21 away from the power module 30, and multiple first heat sinks 71 are connected to the side of the back plate facing the power module 30.

[0042] Specifically, the back plate is arranged relative to the air outlet of the heat dissipation air duct 31, so that when multiple first heat sinks 71 are installed on the back plate, the airflow blown by the heat dissipation fan 50 can be directly received by multiple first heat sinks 71 at the same time, and it can also facilitate the airflow to flow into the air inlet gap formed between two adjacent first heat sinks 71, and the airflow entering the air inlet gap can be received by the back plate, so that the heat in the airflow can be received by multiple first heat sinks 71 and the back plate at the same time, thereby increasing the heat conduction area and improving the heat dissipation efficiency. Of course, in other embodiments, the back plate is connected to the side of the bottom plate 21 close to the power module 30.

[0043] In some embodiments, the second heat exchange element 40 includes a heat-conducting tube 42 and a plurality of second heat sinks 43 disposed in the heat-conducting tube 42 . The heat-conducting tube 42 has a mounting plane, and the heat-conducting tube 42 is mounted on the heat-conducting wall 12 through the mounting plane. The plurality of second heat sinks 43 are distributed in sequence along the thickness direction of the heat-conducting tube 42 .

[0044] Specifically, the heat-conducting tube 42 is formed with a second heat exchange air duct 41, and a plurality of second heat sinks 43 are installed in the second heat exchange air duct 41. When the airflow blown by the heat dissipation fan 50 enters the second heat exchange air duct 41 from the first heat exchange air duct 13, the airflow flows into between two adjacent second heat sinks 43, so that the plurality of second heat sinks 43 simultaneously receive the heat in the airflow, and the plurality of second heat sinks 43 conduct the received heat to the heat-conducting tube 42, and then the heat-conducting tube 42 conducts the heat to the heat-conducting wall 12, thereby increasing the heat conduction area, that is, increasing the heat dissipation area, and thus improving the heat dissipation efficiency. Among them, the plurality of second heat sinks 43 include but are not limited to two, three, four or more. Of course, in other embodiments, only one second heat sink 43 is provided in the heat-conducting tube 42.

[0045] In some embodiments, the power module 30 includes a housing 32 and a circuit assembly 33 . A heat dissipation duct 31 is formed in the housing 32 , and the circuit assembly 33 is disposed in the heat dissipation duct 31 .

[0046] Specifically, the heat dissipation fan 50 and the circuit assembly 33 are both arranged in the heat dissipation duct 31, and the air supply end of the heat dissipation fan 50 faces the circuit assembly 33, so that when the heat dissipation fan 50 blows airflow, the airflow can directly pass through the circuit assembly 33, thereby exchanging heat for the electronic components in the circuit assembly 33, thereby improving the heat dissipation efficiency of the circuit assembly 33. Different from the above-mentioned arrangement of the heat dissipation fan 50, in another embodiment, the heat dissipation fan 50 is arranged outside the heat dissipation duct 31 and is located at one end of the heat dissipation duct 31 away from the first heat exchange duct 13. Of course, in other embodiments, the power module 30 may also not be provided with a housing 32.

[0047] In some embodiments, the internal circulation air-cooled power supply includes multiple power modules 30 and multiple second heat exchange elements 40. The multiple power modules 30 are arranged in sequence along the length direction of the first heat exchange duct 13 and are all connected to the first heat exchange duct 13. A second heat exchange element 40 is provided on the side of each power module 30, and the second heat exchange ducts 41 of the multiple second heat exchange elements 40 are all connected to the first heat exchange duct 13.

[0048] Specifically, multiple power modules 30 and multiple second heat exchangers 40 are arranged in sequence along the length direction of the first heat exchange air duct 13, a second heat exchanger 40 is provided between two adjacent power modules 30, the heat dissipation air duct 31 formed by each power module 30 is connected to the first air exchange channel, the airflow of multiple heat dissipation air ducts 31 flows into the first heat exchange air duct 13, and the second heat exchange air duct 41 of each second heat exchanger 40 is connected to the first heat exchange air duct 13, that is, after the airflow of multiple heat dissipation air ducts 31 flows into the first heat exchange air duct 13, it can flow into the multiple second heat exchange air ducts 41 for heat dissipation, so as to dissipate heat through the multiple second heat exchangers 40, increase the heat dissipation area, and thus improve the heat dissipation effect. At the same time, multiple power modules 30 and multiple second heat exchangers 40 share one first heat exchange air duct 13, so that the structure between multiple power modules 30 and multiple second heat exchangers 40 is faster and more compact, thereby improving the overall structural compactness of the internal circulation air-cooled power supply. The plurality of power modules 30 and the plurality of second heat exchangers 40 include but are not limited to two, three, four, etc. Of course, in other embodiments, the internal circulation air-cooled power supply is provided with only one power module 30 and one second heat exchanger 40 .

[0049] In some embodiments, a return air duct 14 is formed between the side of the power module 30 that faces away from the first heat exchange air duct 13 and the outer casing 10. The return air duct 14 connects the heat dissipation duct 31 of the corresponding power module 30 and the second heat exchange air duct 41 of the adjacent second heat exchange element 40. The two adjacent return air ducts 14 are separated by a partition 60.

[0050] Specifically, the first heat exchange duct 13 and the return duct 14 are located on opposite sides of the heat conducting wall 12, one end of the second heat exchange duct 41 of a second heat exchange element 40 is connected to the first heat exchange duct 13, and the other end is connected to the corresponding return duct 14, and the heat dissipation duct 31 of a power module 30 is connected to the first heat exchange duct 13 at one end, and the other end is connected to the corresponding return duct 14. The airflow flows from the heat dissipation duct 31 into the first heat exchange duct 13, and then flows from the first heat exchange duct 13 into the second heat exchange duct 41, and then flows from the second heat exchange duct 31 into the second heat exchange duct 41. The air duct 41 flows into the return air duct 14, and finally flows from the return air duct 14 into the heat dissipation duct 31 for circulation. When the airflow passes through the first heat exchange duct 13 and the second heat exchange duct 41, the heat contained in the airflow can be transferred to the first heat exchange element 70 and the second heat exchange element 40, so that the airflow flowing into the return air duct 14 contains less heat or no heat. In this way, the airflow blown by the heat dissipation fan 50 circulates and dissipates heat in the heat dissipation duct 31, the first heat exchange duct 13, the second heat exchange duct 41 and the return channel.

[0051] By setting a partition 60 between two adjacent return air ducts 14 to separate them, the airflow flowing into the second heat exchange air duct 41 flows into the corresponding return air duct 14, and at the same time, the airflow in the return air duct 14 flows into the corresponding heat dissipation air duct 31, so that the heat dissipation air duct 31 can be prevented from receiving the airflow of other return air ducts 14, thereby facilitating the control of the circulation of the airflow, effectively preventing the power module 30 from receiving the airflow in other return air ducts 14, resulting in a large temperature difference between multiple power modules 30, and improving the use stability of the internal circulation air-cooled power supply. Of course, in other embodiments, no baffle may be set between two adjacent return air ducts 14.

[0052] In some embodiments, the internal circulation air-cooled power supply further includes a heat dissipation structure 20 , which is disposed on a side of the heat-conducting wall 12 away from the closed inner cavity 11 and is thermally connected to the heat-conducting wall 12 .

[0053] Specifically, the heat dissipation structure 20 is installed on the outer side of the housing 10. When the first heat exchanger 70 and the second heat exchanger 40 transfer heat to the heat-conducting wall 12, it is equivalent to the first heat exchanger 70 and the second heat exchanger 40 transferring heat to the housing 10 through the heat-conducting wall 12. By arranging the heat dissipation structure 20 on the side of the heat-conducting wall 12 away from the closed inner cavity 11, the heat dissipation area of ​​the housing 10 with higher heat is increased, and the heat dissipation effect is effectively provided. Of course, in other embodiments, the internal circulation air-cooled power supply may not be provided with the heat dissipation structure 20.

[0054] In some embodiments, the heat dissipation structure 20 includes a base plate 21 and a plurality of third heat sinks 22 arranged on the base plate 21. The heat conductive seat 72 is thermally connected to the heat conductive wall 12. The plurality of third heat sinks 22 are spaced apart and distributed on a side of the base plate 21 away from the heat conductive wall 12. The plurality of third heat sinks 22 extend along the length direction of the second heat exchange duct 41, and a heat dissipation gap is formed between two adjacent third heat sinks 22.

[0055] Specifically, the heat-conducting wall 12 can conduct the heat in the closed inner cavity 11 to the bottom plate 21, and then the bottom plate 21 conducts the heat to the plurality of third heat sinks 22, and the airflow flows through the heat dissipation gap formed between the adjacent third heat sinks 22 to dissipate heat to the plurality of third heat sinks 22 at the same time, thereby increasing the heat dissipation area of ​​the heat dissipation structure 20, thereby improving the heat dissipation efficiency. Among them, the plurality of third heat sinks 22 include but are not limited to two, three, four or more. Of course, in other embodiments, the heat dissipation structure 20 can also be provided with only one third heat sink 22.

[0056] In some embodiments, the internal circulation air-cooled power supply further includes an air supply fan 55 , which is disposed on a side of the heat-conducting wall 12 away from the closed inner cavity 11 and is disposed toward the heat dissipation structure 20 .

[0057] Specifically, the air supply fan 55 can blow air toward the heat dissipation structure 20, so that the heat dissipation structure 20 is cooled by the air supply fan 55, thereby accelerating the heat dissipation speed of the heat dissipation structure 20, and further improving the heat dissipation efficiency of the heat dissipation structure 20. Of course, in other embodiments, the internal circulation air-cooled power supply may not be provided with the air supply fan 55.

[0058] In some embodiments, the heat dissipation structure 20 also includes a mounting shell 23 , which is covered on multiple third heat sinks 22 , connected to the bottom, and cooperates with the base plate 21 to form a heat dissipation channel 24 , and the heat dissipation fan 50 is disposed in the heat dissipation channel 24 .

[0059] Specifically, the mounting shell 23 is arranged to cover the plurality of third heat sinks 22, so that the mounting shell 23 and the bottom plate 21 form a heat dissipation channel 24, the plurality of third heat sinks 22 and the air supply fan 55 are both arranged in the heat dissipation channel 24, and the air supply end of the air supply fan 55 faces the plurality of third heat sinks 22, so that when the air supply fan 55 blows air toward the plurality of heat sinks, the channel wall of the heat dissipation channel 24 can restrict the air flow and prevent the air flow from diffusing, so that the air flow blown by the air supply fan 55 can be completely received by the plurality of third heat sinks 22, thereby improving the heat dissipation efficiency. Of course, in other embodiments, the heat dissipation structure 20 may not be provided with the mounting shell 23.

[0060] In some embodiments, the internal circulation air-cooled power supply includes a plurality of heat dissipation fans 50 , and a plurality of air supply fans 55 are distributed at intervals along the arrangement direction of the plurality of third heat sinks 22 .

[0061] Specifically, the provision of multiple air supply fans 55 increases the air volume in the heat dissipation channel 24, that is, the third heat sink 22 can receive more airflow, thereby further improving the heat dissipation efficiency. The multiple air supply fans 55 include but are not limited to two, three, four or more. Of course, in other embodiments, the internal circulation air-cooled power supply is only provided with one air supply fan 55.

[0062] In some embodiments, the power module 30 includes a MOS tube 331 , the internal circulation air-cooled power supply includes a third heat exchanger 90 , the third heat exchanger 90 is disposed in the heat dissipation duct 31 , and the MOS tube 331 is thermally connected to the third heat exchanger 90 .

[0063] Specifically, the MOS tube 331 is a device that generates a large amount of heat in the circuit assembly 33. By providing a third heat transfer element that is thermally connected to the MOS tube 331, the heat generated by the MOS tube 331 can be transferred to the third heat transfer element, thereby increasing the heat dissipation area of ​​the MOS tube 331, that is, improving the heat dissipation effect of the MOS tube 331. Of course, in other embodiments, the electric ring converter may not be provided with the third heat exchange element 90.

[0064] In some embodiments, the third heat exchange element 90 includes a heat conducting plate 91 and a plurality of fourth heat sinks 92 disposed on the heat conducting plate 91, the MOS tube 331 is installed on the heat conducting plate 91, the plurality of fourth heat sinks 92 are spaced apart in a direction perpendicular to the first heat exchange air duct 13, and all extend along the length direction of the heat dissipation air duct 31, and a ventilation channel is formed between the plurality of fourth heat sinks 92.

[0065] Specifically, when the airflow blown by the heat dissipation fan 50 passes through the heat dissipation air duct 31, the airflow flows into the ventilation channel formed between two adjacent fourth heat dissipation fins 92, which can increase the heat conduction area of ​​the fourth heat exchange element, and in this way, the airflow blown by the heat dissipation fan 50 can be received by multiple first heat dissipation fins 71 at the same time, thereby increasing the heat conduction area and improving the heat dissipation efficiency. Among them, the multiple fourth heat dissipation fins 92 include but are not limited to two, three, four or more. Of course, in other embodiments, the third heat exchange element 90 is only provided with one fourth heat dissipation fin 92.

[0066] The above are only preferred embodiments of the present invention, and do 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. An internal circulation air-cooled power supply, characterized in that: include: The housing is provided with a closed inner cavity and a heat-conducting wall, wherein the heat-conducting wall constitutes a cavity wall of the closed inner cavity, and the closed inner cavity has a first heat exchange air duct; The heat exchange assembly comprises a first heat exchange element and a second heat exchange element, wherein the second heat exchange element is connected to the heat-conducting wall by thermal conduction and forms a second heat exchange air duct, one end of the second heat exchange air duct is connected to the first heat exchange air duct, and the first heat exchange element is arranged in the first heat exchange air duct and is connected to the heat-conducting wall by thermal conduction; A power module is disposed in the closed inner cavity, wherein the power module is formed with a heat dissipation duct, one end of the heat dissipation duct is connected to the first heat exchange duct, and the other end of the heat dissipation duct is connected to an end of the second heat exchange duct away from the first heat exchange duct, and the heat dissipation duct, the first heat exchange duct and the second heat exchange duct form a circulation duct; as well as The heat dissipation fan is arranged in the circulating air duct and is used to drive the air flow to circulate along the circulating air duct.

2. The internal circulation air-cooled power supply according to claim 1, characterized in that: The first heat exchange member includes a heat-conducting seat and a plurality of first heat sinks arranged on the heat-conducting seat, the heat-conducting seat is thermally connected to the heat-conducting wall, the plurality of first heat sinks are spaced apart in a direction perpendicular to the heat-conducting wall, and all extend along the length direction of the first heat exchange air duct, and the plurality of first heat sinks are spaced apart from each other on a side close to the power module to form an air inlet gap.

3. The internal circulation air-cooled power supply according to claim 2, characterized in that: The heat-conducting seat comprises a bottom plate and a back plate, the bottom plate is mounted on the heat-conducting wall, the back plate is connected to a side of the bottom plate away from the power module, and the first heat sinks are connected to a side of the back plate facing the power module.

4. The internal circulation air-cooled power supply according to claim 1, characterized in that: The second heat exchange member includes a heat-conducting tube and a plurality of second heat sinks arranged in the heat-conducting tube. The heat-conducting tube has a mounting plane. The heat-conducting tube is mounted on the heat-conducting wall through the mounting plane. The plurality of second heat sinks are sequentially spaced apart along the thickness direction of the heat-conducting tube.

5. The internal circulation air-cooled power supply according to claim 1, characterized in that: The power module includes a shell and a circuit assembly. The heat dissipation duct is formed in the shell, and the circuit assembly is arranged in the heat dissipation duct.

6. The internal circulation air-cooled power supply according to claim 1, characterized in that: The internal circulation air-cooled power supply includes a plurality of the power modules and a plurality of the second heat exchange elements. The plurality of power modules are arranged in sequence along the length direction of the first heat exchange duct and are all connected to the first heat exchange duct. A second heat exchange element is provided next to each of the power modules, and the second heat exchange ducts of the plurality of the second heat exchange elements are all connected to the first heat exchange duct.

7. The internal circulation air-cooled power supply according to claim 6, characterized in that: A return air duct is formed between the side of the power module facing away from the first heat exchange air duct and the housing, and the return air duct connects the heat dissipation air duct of the corresponding power module and the second heat exchange air duct of the adjacent second heat exchange element, and two adjacent return air ducts are separated by a partition.

8. The internal circulation air-cooled power supply according to claim 7, characterized in that: The internal circulation air-cooled power supply also includes a heat dissipation structure, which is arranged on a side of the heat-conducting wall away from the closed inner cavity and is thermally connected to the heat-conducting wall.

9. The internal circulation air-cooled power supply according to claim 8, characterized in that: The internal circulation air-cooled power supply also includes an air supply fan, which is arranged on a side of the heat-conducting wall away from the closed inner cavity and is arranged toward the heat dissipation structure.

10. The internal circulation air-cooled power supply according to claim 1, characterized in that: The power module includes a MOS tube, the internal circulation air-cooled power supply includes a third heat exchanger, the third heat exchanger is arranged in the heat dissipation air duct, and the MOS tube is thermally connected to the third heat exchanger.

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