A power converter and power conversion cabinet

Abstract

The application relates to the technical field of electric conversion, in particular to a power converter and a power conversion cabinet. A cavity surrounded by a shell assembly comprises a first cavity and a second cavity; a conversion assembly is connected with the shell assembly; the conversion assembly is arranged in the first cavity; a heat dissipation assembly comprises a first heat exchange unit, a first fan and a second heat exchange unit; a first airflow passes through one end of the second cavity, the first heat exchange unit, the second heat exchange unit and the other end of the second cavity in sequence under the guidance of the first fan; and the heat exchange amount of the first airflow and the second heat exchange unit is greater than the heat exchange amount of the first airflow and the first heat exchange unit. Thus, the problem of difficult heat dissipation of the power converter is solved.

Description

Technical Field

[0001] This invention relates to the field of electrical conversion technology, and more specifically, to a power converter and a power conversion cabinet. Background Technology

[0002] A power converter is a device that converts high-voltage AC input into DC output at a target voltage via a conversion component, and then filters the DC output using a reactor. However, during operation, the conversion component often releases a significant amount of heat. Power converters utilize a cooling system to dissipate heat from the conversion component. Conventional cooling solutions typically employ two axial fans on the power converter, with copper or aluminum heat sinks directly attached to the surface of the conversion component for heat conduction. One axial fan creates directional airflow to enhance convective heat transfer, while the other axial fan directly outputs airflow to the conversion component to achieve heat dissipation.

[0003] However, when existing cooling systems use two axial fans to work together to handle the heat load of the power unit, they need to output two airflows simultaneously through the two axial fans. This means that the power converter needs to supply power to the two axial fans at the same time during operation, which not only wastes energy but also results in the cooling system occupying a large space, low efficiency of the two axial fans working together, and poor heat dissipation. Summary of the Invention

[0004] To address the problem of heat dissipation difficulties in power converters, this invention provides a power converter and a power conversion cabinet.

[0005] In a first aspect, the present invention discloses a power converter, the power converter comprising:

[0006] A housing assembly, the cavity enclosed by the housing assembly including a first cavity and a second cavity;

[0007] A conversion assembly is connected to the housing assembly; the conversion assembly is disposed within the first cavity.

[0008] A heat dissipation assembly includes a first heat exchange unit, a first fan, and a second heat exchange unit. The first heat exchange unit is connected to the housing assembly. The first heat exchange unit is disposed in the second cavity near the first cavity. The second heat exchange unit is connected to the conversion assembly. A portion of the second heat exchange unit is disposed within the second cavity. The first fan is connected to the housing assembly. The first fan is disposed within the second cavity. A first airflow, guided by the first fan, sequentially passes through one end of the second cavity, the first heat exchange unit, the second heat exchange unit, and the other end of the second cavity. The heat exchange amount between the first airflow and the second heat exchange unit is greater than the heat exchange amount between the first airflow and the first heat exchange unit.

[0009] In some embodiments, the first heat exchange unit includes a first heat exchanger, a first channel, and a second channel; the first channel and the second channel respectively penetrate the first heat exchanger; the first channel and the second channel are spaced apart; the first heat exchanger is connected to the housing assembly; the first heat exchanger is disposed on the side of the second cavity near the first cavity; the first channel communicates with the first cavity; the second channel communicates with the second cavity;

[0010] The heat dissipation assembly further includes a second fan; the second fan is connected to the housing assembly; one end of the second fan is connected to the first channel, and the other end is connected to the first cavity; the second airflow, guided by the second fan, sequentially passes through one end of the first channel, the first cavity, and the other end of the first channel, repeating the cycle; the first airflow, guided by the first fan, sequentially passes through one end of the second cavity, the second channel, the second heat exchange unit, and the other end of the second cavity; the airflow rate of the first fan is greater than the airflow rate of the second fan.

[0011] In some embodiments, the housing assembly includes a first housing unit and a second housing unit; the first housing unit is connected to the second housing unit; the first housing unit surrounds and forms the first cavity; a portion of the first housing unit and the second housing unit form the second cavity; the second cavity includes a first space and a second space; the first space is connected to one side of the first housing unit in a first direction; the second space is connected to one side of the first housing unit in a second direction; the first direction and the second direction are perpendicular; the first heat exchange unit and the conversion component are respectively connected to the first housing unit; the first fan is connected to the second housing unit; the first airflow, guided by the first fan, sequentially passes through the end of the first space away from the second space, the first heat exchange unit, the second heat exchange unit, and the end of the second space away from the first space.

[0012] In some embodiments, the second heat exchange unit includes a second heat exchanger, a heat sink, and a third channel; one side of the second heat exchanger is connected to the heat sink, and the other side is connected to the conversion component; the third channel passes through both sides of the heat sink; the heat sink is disposed in the second cavity; the first airflow, guided by the first fan, passes sequentially through one end of the second cavity, the first heat exchange unit, the third channel, and the other end of the second cavity; the heat exchange amount between the first airflow and the heat sink is greater than the heat exchange amount between the first airflow and the first heat exchange unit.

[0013] In some embodiments, the second heat exchange unit further includes a heat insulation element; the second heat exchange element and / or the conversion component are connected to the heat insulation element; the heat insulation element is disposed on the periphery of the connection between the second heat exchange element and the conversion component.

[0014] In some embodiments, the conversion component includes a power unit and a reactor unit; the power unit and the reactor unit are respectively connected to the housing assembly; the power unit and the reactor unit are respectively disposed within the first cavity; the power unit and the reactor unit are electrically connected; the power unit is connected to the second heat exchange unit; the reactor unit, the power unit, and the second fan are arranged sequentially; the second airflow, guided by the second fan, sequentially passes through one end of the first channel, the power unit, the reactor unit, and the other end of the first channel, repeating a cycle; the heat exchange between the second airflow and the power unit is greater than the heat exchange between the second airflow and the reactor unit.

[0015] In some embodiments, the power unit includes an insulated-gate bipolar transistor (IGBT), a rectifier bridge, and a supporting capacitor; the IGBT, the rectifier bridge, and the supporting capacitor are respectively connected to the housing assembly; the IGBT, the rectifier bridge, and the supporting capacitor are respectively disposed within the first cavity; the second fan, the rectifier bridge, the IGBT, and the reactor unit are arranged sequentially; the second fan, the rectifier bridge, the supporting capacitor, and the reactor unit are arranged sequentially; the IGBT, the rectifier bridge, and the supporting capacitor are electrically connected to each other; the IGBT, The rectifier bridge and the supporting capacitor are respectively connected to the second heat exchange unit; the second airflow, guided by the second fan, sequentially passes through one end of the first channel, the rectifier bridge, the insulated gate bipolar transistor, the reactor unit, and the other end of the first channel, repeating the cycle; the second airflow passes through the supporting capacitor while passing through the insulated gate bipolar transistor; the heat exchange between the second airflow and the rectifier bridge is greater than or equal to the heat exchange between the second airflow and the insulated gate bipolar transistor; the heat exchange between the second airflow and the insulated gate bipolar transistor is greater than the heat exchange between the second airflow and the supporting capacitor.

[0016] In some embodiments, the reactor unit includes a reactor and a filter capacitor; the reactor and the filter capacitor are respectively connected to the housing assembly; the reactor and the filter capacitor are respectively disposed in the first cavity; the reactor and the filter capacitor are respectively electrically connected to the power unit.

[0017] In some embodiments, the reactor unit further includes a heat sink; one end of the heat sink is connected to the reactor and the filter capacitor respectively, and the other end extends into the second cavity; the first airflow passes sequentially through one end of the second cavity, the second channel, the second heat exchange unit, the heat sink, and the other end of the second cavity under the guidance of the first fan.

[0018] In a second aspect, the present invention discloses a power conversion cabinet, which may include any of the power converters described in the first aspect, and the power conversion cabinet includes:

[0019] A housing assembly, with at least one power converter connected to the housing assembly; the power converter is disposed within the space enclosed by the housing assembly.

[0020] To solve the problem of heat dissipation difficulties in power converters, this invention has the following advantages:

[0021] The structural layout, comprising a first cavity and a second cavity, formed by the housing assembly, fixes the conversion component inside the first cavity. The first heat exchange unit of the heat dissipation component is positioned in the second cavity near the side wall of the first cavity, extending partially into the second cavity and directly connected to the conversion component. A directional airflow generated by a first fan within the second cavity guides the airflow along a path from the end of the second cavity, through the first heat exchange unit, then the second heat exchange unit, and finally the other end of the second cavity. Because the second heat exchange unit has a higher operating temperature due to direct thermal conduction with the conversion component, this structure ensures that after initial heat exchange with the lower-temperature first heat exchange unit, the airflow maintains sufficient cooling capacity for high-intensity heat exchange with the second heat exchange unit. Through the coordinated drive of a single fan, a series sequential cooling of the first and second heat exchange units is achieved, ensuring the second heat exchange unit receives the necessary heat dissipation intensity while avoiding structural redundancy caused by two independent air duct systems. Attached Figure Description

[0022] Figure 1 A first-view schematic diagram of a power converter according to one embodiment is shown;

[0023] Figure 2 A second-view schematic diagram of a power converter according to one embodiment is shown;

[0024] Figure 3 A third-view schematic diagram of a power converter according to one embodiment is shown;

[0025] Figure 4 A fourth-view schematic diagram of a power converter according to one embodiment is shown;

[0026] Figure 5 A fifth-view schematic diagram of a power converter according to one embodiment is shown;

[0027] Figure 6 A schematic diagram of a power conversion cabinet according to one embodiment is shown.

[0028] Reference numerals: 01 Housing assembly; 11 First housing unit; 12 Second housing unit; 02 Heat dissipation assembly; 21 First heat exchange unit; 211 First channel; 212 Second channel; 22 First fan; 23 Second heat exchange unit; 231 Second heat exchanger; 232 Heat sink; 233 Insulation; 234 Third channel; 24 Second fan; 03 Conversion assembly; 31 Power unit; 311 Insulated gate bipolar transistor; 312 Rectifier bridge; 313 Support capacitor; 32 Reactor unit; 321 Reactor; 322 Filter capacitor; 323 Heat sink; 04 Enclosure assembly. Detailed Implementation

[0029] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0030] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0031] In this embodiment, a power converter is a device that converts input high-voltage AC power into target voltage DC power. During the use of the power converter, the conversion component 03 often releases a large amount of heat. In traditional power converters, two axial flow fans simultaneously dissipate heat from different directions on the conversion component 03, resulting in redundant airflow paths and uneven heat exchange intensity, ultimately leading to low synchronous heat dissipation efficiency of the conversion component 03. This embodiment discloses a power converter, such as... Figure 2As shown, the power converter may include a housing assembly 01, a conversion assembly 03, and a heat dissipation assembly 02. The cavity surrounded by the housing assembly 01 may include a first cavity and a second cavity; the conversion assembly 03 may be connected to the housing assembly 01; the conversion assembly 03 may be disposed in the first cavity, and the heat generated by the conversion assembly 03 during operation can be transferred to the second cavity through the first cavity. This structure divides the space into independent heat dissipation zones, achieving heat source isolation through cavity separation, and providing a physical basis for differentiated thermal management.

[0032] like Figure 1 As shown, the heat dissipation assembly 02 may include a first heat exchange unit 21, a first fan 22, and a second heat exchange unit 23. The first heat exchange unit 21 may be connected to the housing assembly 01. The first heat exchange unit 21 may be disposed in the second cavity near the first cavity, allowing heat generated by the conversion assembly 03 to be transferred to the first heat exchange unit 21 within the first cavity. The second heat exchange unit 23 may be connected to the conversion assembly 03, allowing heat generated by the conversion assembly 03 during operation to be transferred to the second heat exchange unit 23. A portion of the second heat exchange unit 23 may be disposed within the second cavity. The first fan 22 may be connected to the housing assembly 01 and disposed within the second cavity. By optimizing the positional relationship between the first heat exchange unit 21 and the second cavity, and combining this with the layout where the second heat exchange unit 23 partially extends into the second cavity, a series heat exchange path is formed.

[0033] Guided by the first fan 22, the first airflow sequentially passes through one end of the second cavity, the first heat exchange unit 21, and the second heat exchange unit 23, and then flows out of the power converter from the other end of the second cavity. The heat exchange between the first airflow and the second heat exchange unit 23 can be greater than the heat exchange between the first airflow and the first heat exchange unit 21. After absorbing the heat from the first heat exchange unit 21, the temperature of the first airflow is still lower than the temperature of the second heat exchange unit 23. Therefore, the first airflow can simultaneously meet the heat dissipation requirements of both the first heat exchange unit 21 and the second heat exchange unit 23, ensuring that the second heat exchange unit 23 obtains the necessary heat dissipation intensity while avoiding structural redundancy caused by setting up two independent air duct systems.

[0034] In this embodiment, the first heat exchange unit 21 may include a first heat exchanger, a first channel 211, and a second channel 212; the first channel 211 and the second channel 212 may each penetrate the first heat exchanger; the first channel 211 and the second channel 212 may be spaced apart; the first heat exchanger may be connected to the housing assembly 01; the first heat exchanger may be disposed on the side of the second cavity near the first cavity; the first channel 211 may communicate with the first cavity; the second channel 212 may communicate with the second cavity. Through the dual-channel independent airflow path design, physical isolation is achieved between the second airflow circulation inside the first cavity and the first airflow path in the second cavity.

[0035] The heat dissipation assembly 02 may further include a second fan 24; the second fan 24 may be connected to the housing assembly 01; one end of the second fan 24 may be connected to the first channel 211, and the other end may be connected to the first cavity; the second airflow may circulate repeatedly under the guidance of the second fan 24, passing sequentially through one end of the first channel 211, the first cavity, and the other end of the first channel 211; the first airflow may circulate sequentially under the guidance of the first fan 22, passing sequentially through one end of the second cavity, the second channel 212, the second heat exchange unit 23, and the other end of the second cavity. The airflow guidance direction of the first fan may be the same as the flow direction of the first airflow. By setting an independently circulating second airflow, a closed-loop heat dissipation system is formed for the components inside the first cavity, allowing the second airflow to flow directly through the first cavity to directly dissipate heat from the conversion assembly 03 inside the first cavity, further improving the heat dissipation efficiency of the power converter.

[0036] The airflow rate of the first fan 22 can be greater than that of the second fan 24. Since the power converter requires cooling of the second airflow through the first airflow during operation, the greater airflow rate of the first fan 22 ensures that the first airflow can cool the second airflow while meeting the high-intensity heat dissipation requirements of the second heat exchange unit 23. This avoids structural redundancy in the power converter and achieves an optimized balance between energy consumption and heat dissipation efficiency. During operation, the larger airflow rate and lower wind resistance of the first airflow located outside the power converter enable efficient heat dissipation. Furthermore, the cooling of the second airflow through the first airflow allows the relatively independent second airflow to dissipate heat from the internal components of the power converter without contacting the external environment. This dual-circulation design of the first and second airflows allows the power converter to cool and dissipate heat in harsh environments while achieving high protection.

[0037] In this embodiment, the housing assembly 01 may include a first housing unit 11 and a second housing unit 12; the first housing unit 11 may be connected to the second housing unit 12; the first housing unit 11 may surround and form a first cavity; a portion of the first housing unit 11 and the second housing unit 12 may form a second cavity; the second cavity may include a first space and a second space; the first space may be connected to one side of the first housing unit 11 in a first direction; the second space may be connected to one side of the first housing unit 11 in a second direction; the first direction and the second direction may be perpendicular. The orthogonal spatial layout shortens the length of the first airflow path, reducing energy loss during gas flow. The first heat exchange unit 21 and the conversion assembly 03 may be connected to the first housing unit 11 respectively; the first fan 22 may be connected to the second housing unit 12; the first airflow, guided by the first fan 22, may sequentially pass through the end of the first space away from the second space, the first heat exchange unit 21, the second heat exchange unit 23, and the end of the second space away from the first space. The orthogonal cavity structure, combined with the single-corner first airflow path design, optimizes the first airflow organization efficiency while ensuring structural compactness, preventing the first airflow from slowing down due to changes in direction during the flow process, thus affecting the gas flow rate.

[0038] In this embodiment, as Figure 3 As shown, the second heat exchange unit 23 may include a second heat exchanger 231, a heat sink 232, and a third channel 234. One side of the second heat exchanger 231 can be connected to the heat sink 232, and the other side can be connected to the conversion component 03. The third channel 234 can pass through both sides of the heat sink 232. The heat sink 232 can be disposed within the second cavity. The first airflow can pass sequentially through one end of the second cavity, the first heat exchange unit 21, the third channel 234, and the other end of the second cavity under the guidance of the first fan 22. Through the integrated design of the heat sink 232 and the third channel 234, the effective heat dissipation area is increased within a limited space. During the operation of the power converter, the heat generated by the power unit 31 can be transferred to the second heat exchanger 231. One side of the second heat exchanger 231 can be connected to the heat sink 232, so that the first airflow flowing through the third channel 234 on the heat sink 232 can absorb the heat on the second heat exchanger 231, thereby achieving heat dissipation for the power unit 31. The second heat exchange unit 23 may include multiple third channels 234, which can extend through both sides of the heat sink 232 along its length, so that multiple first airflows can pass through the third channels 234 on the heat sink 232 at the same time, thereby improving the heat dissipation efficiency of the power converter.

[0039] The heat exchange between the first airflow and the heat sink 232 can be greater than the heat exchange between the first airflow and the first heat exchange unit 21. Since most of the heat is concentrated on the second heat exchanger 231 during the operation of the power converter, the heat exchange between the first airflow and the heat sink 232 can be greater than the heat exchange between the first airflow and the first heat exchange unit 21, so that the heat generated by the power converter can be dissipated in a high-intensity manner in the third channel 234 region.

[0040] In this embodiment, the second heat exchange unit 23 may further include a heat insulation body 233; the second heat exchanger 231 and / or the conversion component 03 may be connected to the heat insulation body 233; the heat insulation body 233 may be disposed on the periphery of the connection between the second heat exchanger 231 and the conversion component 03. Through a fully circumferentially enclosed heat insulation structure, the heat radiation transmission path is blocked, preventing heat transferred from the conversion component 03 to the second heat exchanger 231 and the heat sink 232 from being radiated back to the conversion component 03, thereby preventing the conversion component 03 from exceeding its temperature limit due to secondary heating and improving the heat dissipation efficiency of the power converter.

[0041] In this embodiment, as Figure 5 As shown, the conversion component 03 may include a power unit 31 and a reactor unit 32. The power unit 31 can convert AC power into DC power, and the reactor unit 32 can regulate the DC power. The power unit 31 and the reactor unit 32 can be connected to the housing component 01 respectively. The power unit 31 and the reactor unit 32 can be respectively disposed in the first cavity. The power unit 31 can be electrically connected to the reactor unit 32. The power unit 31 can be connected to the second heat exchange unit 23. The reactor unit 32, the power unit 31, and the second fan 24 can be arranged sequentially. The second airflow can be guided by the second fan 24 to pass sequentially through one end of the first channel 211, the power unit 31, the reactor unit 32, and the other end of the first channel 211, repeating the cycle. By matching the heat sensitivity of the components through the second airflow path sequence, the power unit 31 with high heat load is cooled first, so that the second airflow can cool multiple components simultaneously.

[0042] The heat exchange between the second airflow and the power unit 31 can be greater than the heat exchange between the second airflow and the reactor unit 32. Since the power unit 31 releases more heat than the reactor unit 32 during the operation of the power converter, the heat exchange between the second airflow and the power unit 31 can be greater than the heat exchange between the second airflow and the reactor unit 32. Optimizing the heat exchange intensity distribution of the second airflow allows the second airflow to meet the heat dissipation requirements of both the power unit 31 and the reactor unit 32 while avoiding energy waste.

[0043] In this embodiment, the power unit 31 may include an insulated gate bipolar transistor 311 (IGBT), a rectifier bridge 312, and a supporting capacitor 313; such as Figure 4 , Figure 3 As shown, the insulated gate bipolar transistor 311 can regulate the voltage of the DC power supply; the rectifier bridge 312 can convert AC power to DC power; and the supporting capacitor 313 can stabilize the DC power supply. The insulated gate bipolar transistor (IGBT) 311, rectifier bridge 312, and supporting capacitor 313 can be connected to the housing assembly 01 respectively; the IGBT 311, rectifier bridge 312, and supporting capacitor 313 can be respectively disposed in the first cavity; the second fan 24, rectifier bridge 312, IGBT 311, and reactor unit 32 can be arranged sequentially; the second fan 24, rectifier bridge 312, supporting capacitor 313, and reactor unit 32 can be arranged sequentially; the IGBT 311, rectifier bridge 312, and supporting capacitor 313 can be electrically connected to each other, thereby realizing a stable voltage output of the power converter; the IGBT 311, rectifier bridge 312, and supporting capacitor 313 can be connected to the second heat exchange unit 23 respectively; the second airflow can be guided by the second fan 24 to pass sequentially through one end of the first channel 211, the rectifier bridge 312, the IGBT 311, the reactor unit 32, and the other end of the first channel 211 in a repeated cycle. Through a multi-element series design, the second airflow can sequentially cool multiple heat sources.

[0044] The second airflow can pass through the insulated-gate bipolar transistor 311 and the supporting capacitor 313 simultaneously. The heat exchange between the second airflow and the rectifier bridge 312 can be greater than or equal to the heat exchange between the second airflow and the insulated-gate bipolar transistor 311. Since the rectifier bridge 312 releases more heat than the insulated-gate bipolar transistor 311 during the operation of the power converter, the heat exchange between the second airflow and the rectifier bridge 312 can be greater than the heat exchange between the second airflow and the insulated-gate bipolar transistor 311. Optimizing the distribution of airflow heat exchange intensity allows the second airflow to meet the heat dissipation requirements of the rectifier bridge 312 and the insulated-gate bipolar transistor 311 while avoiding energy waste. The heat exchange between the second airflow and the insulated-gate bipolar transistor 311 can be greater than the heat exchange between the second airflow and the supporting capacitor 313. Since the insulated-gate bipolar transistor 311 releases more heat than the supporting capacitor 313 during power converter operation, the optimized heat exchange intensity distribution allows the second airflow to meet the heat dissipation needs of both the insulated-gate bipolar transistor 311 and the supporting capacitor 313 while avoiding energy waste. By controlling the heat dissipation intensity in stages according to the heating characteristics of each power component, the second airflow can simultaneously ensure the heat dissipation needs of the rectifier bridge 312, the insulated-gate bipolar transistor 311, and the supporting capacitor 313.

[0045] In this embodiment, the reactor unit 32 may include a reactor 321 and a filter capacitor 322; the reactor 321 and the filter capacitor 322 may be connected to the housing assembly 01 respectively; the reactor 321 and the filter capacitor 322 may be disposed in the first cavity respectively; the reactor 321 and the filter capacitor 322 may be electrically connected to the power unit 31 respectively. The reactor 321 can regulate the DC power supply, and the filter capacitor 322 can regulate the DC power supply. Through the cooperation of the reactor 321 and the filter capacitor 322, the power converter can achieve voltage regulation of the power supply.

[0046] In this embodiment, the reactor unit 32 may further include a heat sink 323; one end of the heat sink 323 may be connected to the reactor 321 and the filter capacitor 322 respectively, and the other end extends into the second cavity; the first airflow, guided by the first fan 22, may sequentially pass through one end of the second cavity, the second channel 212, the second heat exchange unit 23, the heat sink 323, and the other end of the second cavity. By providing the heat sink 323, the first airflow can cool the heat flowing into the heat sink from the reactor 321 and the filter capacitor 322 as it flows through the heat sink 323.

[0047] This embodiment discloses a power conversion cabinet, which may include a power converter from any of the above embodiments, such as... Figure 6 As shown, the power conversion cabinet may include a enclosure assembly 04. At least one power converter is connected to the enclosure assembly 04; the power converter is disposed within the space enclosed by the enclosure assembly 04. The power conversion cabinet may include multiple enclosure assemblies 04 (multiple enclosure assemblies 04 can be connected according to the actual number), and the multiple enclosure assemblies 04 can be independent of each other, while the internal airflow can also remain independent to prevent mutual interference between the multiple enclosure assemblies 04. Furthermore, the power conversion cabinet can be adapted to meet actual needs.

[0048] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A power converter, characterized in that, The power converter includes: A housing assembly, the cavity enclosed by the housing assembly including a first cavity and a second cavity; A conversion assembly is connected to the housing assembly; the conversion assembly is disposed within the first cavity. A heat dissipation assembly includes a first heat exchange unit, a first fan, and a second heat exchange unit. The first heat exchange unit is connected to the housing assembly. The first heat exchange unit is disposed in a second cavity near the first cavity. The second heat exchange unit is connected to the conversion assembly. A portion of the second heat exchange unit is disposed within the second cavity. The first fan is connected to the housing assembly. The first fan is disposed within the second cavity. A first airflow, guided by the first fan, sequentially passes through one end of the second cavity, the first heat exchange unit, the second heat exchange unit, and the other end of the second cavity. The heat exchange amount between the first airflow and the second heat exchange unit is greater than the heat exchange amount between the first airflow and the first heat exchange unit. The first heat exchange unit includes a first heat exchanger, a first channel, and a second channel; the first channel and the second channel respectively penetrate the first heat exchanger; the first channel and the second channel are spaced apart; the first heat exchanger is connected to the housing assembly; the first heat exchanger is disposed on the side of the second cavity near the first cavity; the first channel communicates with the first cavity; the second channel communicates with the second cavity; The heat dissipation assembly further includes a second fan; the second fan is connected to the housing assembly; one end of the second fan is connected to the first channel, and the other end is connected to the first cavity; the second airflow, guided by the second fan, sequentially passes through one end of the first channel, the first cavity, and the other end of the first channel, repeating the cycle; the first airflow, guided by the first fan, sequentially passes through one end of the second cavity, the second channel, the second heat exchange unit, and the other end of the second cavity; the airflow rate of the first fan is greater than the airflow rate of the second fan.

2. A power converter according to claim 1, characterized in that, The housing assembly includes a first housing unit and a second housing unit; the first housing unit is connected to the second housing unit; the first housing unit surrounds and forms the first cavity; a portion of the first housing unit and the second housing unit form the second cavity; the second cavity includes a first space and a second space; The first space is connected to one side of the first housing unit in a first direction; the second space is connected to one side of the first housing unit in a second direction; the first direction and the second direction are perpendicular to each other; the first heat exchange unit and the conversion component are respectively connected to the first housing unit; the first fan is connected to the second housing unit; the first airflow, guided by the first fan, passes sequentially through the end of the first space away from the second space, the first heat exchange unit, the second heat exchange unit, and the end of the second space away from the first space.

3. A power converter according to claim 1, characterized in that, The second heat exchange unit includes a second heat exchanger, a heat sink, and a third channel; one side of the second heat exchanger is connected to the heat sink, and the other side is connected to the conversion component; the third channel runs through both sides of the heat sink; the heat sink is disposed in the second cavity; the first airflow, guided by the first fan, passes sequentially through one end of the second cavity, the first heat exchange unit, the third channel, and the other end of the second cavity; the heat exchange between the first airflow and the heat sink is greater than the heat exchange between the first airflow and the first heat exchange unit.

4. A power converter according to claim 3, characterized in that, The second heat exchange unit further includes a heat insulation body; the second heat exchange body and / or the conversion component are connected to the heat insulation body; the heat insulation body is disposed on the periphery of the connection between the second heat exchange body and the conversion component.

5. A power converter according to claim 1, characterized in that, The conversion component includes a power unit and a reactor unit; the power unit and the reactor unit are respectively connected to the housing assembly; the power unit and the reactor unit are respectively disposed in the first cavity; the power unit and the reactor unit are electrically connected; the power unit is connected to the second heat exchange unit; the reactor unit, the power unit, and the second fan are arranged in sequence; the second airflow, guided by the second fan, passes sequentially through one end of the first channel, the power unit, the reactor unit, and the other end of the first channel, repeating the cycle; the heat exchange between the second airflow and the power unit is greater than the heat exchange between the second airflow and the reactor unit.

6. A power converter according to claim 5, characterized in that, The power unit includes an insulated-gate bipolar transistor (IGBT), a rectifier bridge, and a supporting capacitor; the IGBT, rectifier bridge, and supporting capacitor are respectively connected to the housing assembly; the IGBT, rectifier bridge, and supporting capacitor are respectively disposed within the first cavity; the second fan, rectifier bridge, IGBT, and reactor unit are arranged sequentially; the second fan, rectifier bridge, supporting capacitor, and reactor unit are arranged sequentially; the IGBT, rectifier bridge, and supporting capacitor are electrically connected to each other; the IGBT, rectifier bridge, and supporting capacitor are... The bridge and the supporting capacitor are respectively connected to the second heat exchange unit; the second airflow, guided by the second fan, sequentially passes through one end of the first channel, the rectifier bridge, the insulated gate bipolar transistor, the reactor unit, and the other end of the first channel, repeating the cycle; the second airflow passes through the supporting capacitor while passing through the insulated gate bipolar transistor; the heat exchange between the second airflow and the rectifier bridge is greater than or equal to the heat exchange between the second airflow and the insulated gate bipolar transistor; the heat exchange between the second airflow and the insulated gate bipolar transistor is greater than the heat exchange between the second airflow and the supporting capacitor.

7. A power converter according to claim 5, characterized in that, The reactor unit includes a reactor and a filter capacitor; the reactor and the filter capacitor are respectively connected to the housing assembly; the reactor and the filter capacitor are respectively disposed in the first cavity; the reactor and the filter capacitor are respectively electrically connected to the power unit.

8. A power converter according to claim 7, characterized in that, The reactor unit also includes a heat sink; one end of the heat sink is connected to the reactor and the filter capacitor respectively, and the other end extends into the second cavity; the first airflow passes sequentially through one end of the second cavity, the second channel, the second heat exchange unit, the heat sink, and the other end of the second cavity under the guidance of the first fan.

9. A power conversion cabinet, characterized in that, The power conversion cabinet includes a power converter as described in any one of claims 1-7, and the power conversion cabinet further includes: A housing assembly, with at least one power converter connected to the housing assembly; the power converter is disposed within the space enclosed by the housing assembly.

Images