Electrical cabinet

Abstract

The utility model relates to the technical field of power electronic heat dissipation, in particular to an electrical cabinet. The electrical cabinet provided by the utility model comprises a cabinet body, a first device to be radiated, a phase change radiator and a second device to be radiated, the cabinet body is internally provided with a closed accommodating space and an external circulation heat radiation air channel which are mutually independent, the first device to be radiated is accommodated in the closed accommodating space, and the phase change radiator is accommodated in the external circulation heat radiation air channel. The phase change radiator comprises an evaporator and a condenser which are communicated, the evaporator is located in the closed containing space and attached to the first to-be-cooled device, the condenser is located in the outer circulation heat dissipation air channel, and the second to-be-cooled device is located in the outer circulation heat dissipation air channel. According to the electrical cabinet, independent heat dissipation and cooling of related devices in the closed accommodating space and the outer circulation heat dissipation air duct are realized, the cost is reduced, the high protection requirement of the electrical cabinet is met, and the heat dissipation effect is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronic heat dissipation, in particular to an electrical cabinet. Background Art

[0002] At present, most electrical cabinets adopt the form of direct heat exchange, that is, the cold air is directly sucked in from outside the cabinet through the fan to dissipate the heat source inside the cabinet, and then the heated hot air is discharged outside the cabinet. With the rapid development of the new energy industry, the application of electrical cabinets in complex and harsh environments is gradually increasing, and the application environment such as wind, sand, and salt spray is becoming increasingly normalized, so the protection requirements for electrical cabinets are also getting higher and higher.

[0003] In the related art, liquid cooling is usually used to heat all the components inside the electrical cabinet. Liquid cooling can completely isolate the internal components from the external environment. However, the above heat dissipation method does not differentiate the components inside the electrical cabinet, and the liquid cooling method requires an additional water cooling system, which increases the cost.

[0004] Therefore, an electrical cabinet is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an electrical cabinet to achieve independent heat dissipation and cooling of related components in a closed accommodating space and an external circulation heat dissipation duct, reduce costs, meet the high protection requirements of the electrical cabinet, and improve the heat dissipation effect.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An electrical cabinet, comprising:

[0008] A cabinet body, wherein the interior of the cabinet body is provided with mutually independent enclosed accommodating spaces and external circulation heat dissipation ducts;

[0009] A first heat dissipation device to be cooled, the first heat dissipation device to be cooled is accommodated in the closed accommodation space;

[0010] a phase-change heat sink, the phase-change heat sink comprising an evaporator and a condenser connected to each other, the evaporator being located in the enclosed accommodation space and being in contact with the first heat dissipation device, and the condenser being located in the external circulation heat dissipation air duct; and

[0011] A second device to be cooled is located in the external circulation cooling air duct.

[0012] As an optional solution, the first device to be cooled includes a power module, which is accommodated in the enclosed accommodation space, and the second device to be cooled includes a capacitor group and a reactor, which are both electrically connected to the power module and are both located in the external circulation cooling air duct.

[0013] As an optional solution, the cabinet body is provided with an air inlet and an air outlet connected to the external circulation heat dissipation air duct, and the electrical cabinet further includes:

[0014] A heat dissipation fan is located in the external circulation heat dissipation air duct.

[0015] As an optional solution, the external circulation heat dissipation air duct includes a first external circulation heat dissipation air duct and a second external circulation heat dissipation air duct which are independent of each other, the cabinet is provided with a first air inlet and a first air outlet which are connected to the first external circulation heat dissipation air duct, the cabinet is also provided with a second air inlet and a second air outlet which are connected to the second external circulation heat dissipation air duct, the condenser and the capacitor bank are both located in the first external circulation heat dissipation air duct, and the reactor is located in the second external circulation heat dissipation air duct.

[0016] As an optional solution, the external circulation heat dissipation air duct includes a first external circulation heat dissipation air duct and a second external circulation heat dissipation air duct which are independent of each other, the cabinet is provided with a first air inlet and a first air outlet which are connected to the first external circulation heat dissipation air duct, the cabinet is also provided with a second air inlet and a second air outlet which are connected to the second external circulation heat dissipation air duct, the condenser is located in the first external circulation heat dissipation air duct, and the capacitor bank group and the reactor are both located in the second external circulation heat dissipation air duct.

[0017] As an optional solution, the electrical cabinet further includes:

[0018] a first cooling fan, the first cooling fan being located in the first external circulation cooling air duct; and

[0019] A second heat dissipation fan, wherein the second heat dissipation fan is located in the second external circulation heat dissipation air duct.

[0020] As an optional scheme, the external circulation heat dissipation duct includes a first external circulation heat dissipation duct, a second external circulation heat dissipation duct and a third external circulation heat dissipation duct which are independent of each other, the cabinet is provided with a first air inlet and a first air outlet which are connected to the first external circulation heat dissipation duct, the cabinet is also provided with a second air inlet and a second air outlet which are connected to the second external circulation heat dissipation duct, the cabinet is also provided with a third air inlet and a third air outlet which are connected to the third external circulation heat dissipation duct, the condenser is located in the first external circulation heat dissipation duct, the capacitor bank is located in the second external circulation heat dissipation duct, and the reactor is located in the third external circulation heat dissipation duct.

[0021] As an optional solution, the electrical cabinet further includes:

[0022] A first cooling fan, wherein the first cooling fan is located in the first external circulation cooling air duct;

[0023] a second cooling fan, the second cooling fan being located in the second external circulation cooling air duct; and

[0024] A third cooling fan is located in the third external circulation cooling air duct.

[0025] As an optional solution, the placement position of the condenser forms an angle with the flow direction of the gas in the external circulation heat dissipation duct.

[0026] As an optional solution, the phase change heat sink includes two condensers, and the two condensers are arranged in a V shape.

[0027] As an optional solution, the evaporator is installed in a vertical direction, and the power modules are located on two opposite sides of the evaporator.

[0028] Beneficial effects of the utility model:

[0029] The utility model provides an electrical cabinet, which includes a cabinet body, a first device to be cooled, a phase-change radiator and a second device to be cooled, wherein the interior of the cabinet body is provided with mutually independent closed accommodating spaces and external circulation cooling air ducts, the first device to be cooled is accommodated in the closed accommodating space, the phase-change radiator includes a connected evaporator and a condenser, the evaporator is located in the closed accommodating space and fits with the first device to be cooled, the condenser is located in the external circulation cooling air duct, and the second device to be cooled is located in the external circulation cooling air duct. The electrical cabinet dissipates heat and cools the first device to be cooled in the closed accommodating space through the evaporator in the phase-change radiator, and ventilates and cools the condenser and the second device to be cooled in the external circulation cooling air duct in the form of direct heat exchange, thereby realizing independent heat dissipation and cooling of related devices in the closed accommodating space and the external circulation cooling air duct, reducing costs, meeting the high protection requirements of the electrical cabinet, and improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of the electrical cabinet provided in the first embodiment of the utility model;

[0031] Figure 2 It is a side view of the electrical cabinet provided in the first embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the phase change heat sink and power module provided in the first embodiment of the utility model. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of the structure of the phase change heat sink and power module provided in the first embodiment of the utility model. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of the structure of the phase change heat sink and power module provided in the first embodiment of the utility model. Figure 3 ;

[0035] Figure 6 This is a side view of the electrical cabinet provided by the second embodiment of the utility model Figure 1 ;

[0036] Figure 7 This is a side view of the electrical cabinet provided by the second embodiment of the utility model Figure 2 ;

[0037] Figure 8 It is a side view of the electrical cabinet provided in the third embodiment of the utility model;

[0038] Fig. 9 It is a side view of the electrical cabinet provided in the fourth embodiment of the utility model.

[0039] In the figure:

[0040] 1. Cabinet; 11. Enclosed storage space; 12. External circulation cooling air duct; 121. First external circulation cooling air duct; 122. Second external circulation cooling air duct; 123. Third external circulation cooling air duct; 13. Air inlet; 131. First air inlet; 132. Second air inlet; 133. Third air inlet; 14. Air outlet; 141. First air outlet; 142. Second air outlet; 143. Third air outlet; 15. Condenser air Duct enclosure; 151, vent; 16, reactor duct enclosure; 2, power module; 3, phase change radiator; 31, evaporator; 32, condenser; 321, steam collecting pipe; 322, liquid collecting pipe; 323, condenser; 33, steam connecting pipe; 34, liquid connecting pipe; 4, capacitor bank; 5, reactor; 6, cooling fan; 61, first cooling fan; 62, second cooling fan; 63, third cooling fan; 7, electrical connector. DETAILED DESCRIPTION

[0041] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] Embodiment 1

[0046] At present, most electrical cabinets adopt the form of direct heat exchange, that is, cold air is directly sucked in from outside the cabinet through a fan to dissipate the heat source inside the cabinet, and then the heated hot air is discharged outside the cabinet. With the rapid development of the new energy industry, the application of electrical cabinets in complex and harsh environments has gradually increased, and application environments such as wind, sand, and salt spray have become increasingly normalized, so the protection requirements for electrical cabinets are also getting higher and higher. In related technologies, liquid cooling is usually used to perform heat exchange and heat dissipation on all devices inside the electrical cabinet. Liquid cooling can completely isolate the internal devices from the external environment. However, the above heat dissipation method does not differentiate the heat dissipation of the devices inside the electrical cabinet, and the liquid cooling method requires an additional water cooling system, which increases the cost.

[0047] In order to solve the above problems, Figure 1 and Figure 2As shown, the present embodiment provides an electrical cabinet, which includes a cabinet body 1, a first device to be cooled, a phase change radiator 3 and a second device to be cooled, wherein the interior of the cabinet body 1 is provided with mutually independent enclosed accommodating spaces 11 and an external circulation heat dissipation duct 12, the first device to be cooled is accommodated in the enclosed accommodating space 11, the phase change radiator 3 includes an evaporator 31 and a condenser 32 which are connected, the evaporator 31 is located in the enclosed accommodating space 11 and is in contact with the first device to be cooled, the condenser 32 is located in the external circulation heat dissipation duct 12, and the second device to be cooled is also located in the external circulation heat dissipation duct 12. The heat generated by the first device to be radiated can be heat exchanged with the cooling medium in the evaporator 31. The cooling medium in the evaporator 31 absorbs heat and vaporizes and enters the condenser 32 for cooling. The gas phase cooling medium in the condenser 32 is cooled and condensed under the ventilation and heat dissipation of the external circulation heat dissipation duct 12. The cooling medium after cooling and condensation flows back to the evaporator 31 and heat exchanges with the first device to be radiated again, and this reciprocating process is repeated to achieve cooling of the first device to be radiated. The electrical cabinet dissipates heat and cools the first device to be radiated in the enclosed space 11 through the evaporator 31 in the phase change radiator 3, and ventilates and cools the condenser 32 and the second device to be radiated in the external circulation heat dissipation duct 12 in the form of direct heat exchange, thereby achieving independent heat dissipation and cooling of the relevant devices in the enclosed space 11 and the external circulation heat dissipation duct 12, which not only reduces the cost, but also meets the high protection requirements of the electrical cabinet and improves the heat dissipation effect.

[0048] It should be noted that, in the present embodiment, the electrical cabinet mainly refers to a power cabinet, such as a converter, and the first heat dissipation device is a power module 2, and the second heat dissipation device includes a capacitor bank 4 and a reactor 5, both of which are electrically connected to the power module 2, and both of which are located in the external circulation heat dissipation duct 12. In other embodiments, the electrical cabinet may also be other forms of electronic power equipment, and in other embodiments, the first heat dissipation device may also be other forms of devices, and the second heat dissipation device may also be other forms of devices.

[0049] In addition, it should be noted that the power module 2 inside the electrical cabinet has relatively high requirements on the environment, so the power module 2 is arranged in a closed accommodating space 11 inside the cabinet body 1 to improve the protection effect of the power module 2, thereby ensuring the high protection of the entire electrical cabinet.

[0050] In this embodiment, the condenser 32, the reactor 5 and the capacitor bank 4 are all treated with a salt spray resistance solution to ensure that the condenser 32, the reactor 5 and the capacitor bank 4 can still work normally in a harsh environment. For example, the condenser 32, the reactor 5 and the capacitor bank 4 can all be treated with a salt spray resistance solution by means of spraying or electroplating, and the reactor 5 can also be treated with a salt spray resistance solution by means of encapsulation. This embodiment does not limit the specific form of the salt spray resistance solution treatment of the condenser 32, the reactor 5 and the capacitor bank 4.

[0051] In the present embodiment, the capacitor pool group 4 includes a capacitor body, the capacitor body is treated with a salt spray resistance solution, the capacitor body is located in the external circulation heat dissipation duct 12, and the terminals on the capacitor body are electrically connected to the power module 2 through the electrical connector 7, and the terminals on the capacitor body and the electrical connector 7 are both located in the closed accommodation space 11. Optionally, in the present embodiment, the electrical connector 7 can be a connecting copper busbar, or the electrical connector 7 can be an aluminum busbar. It should be noted that in the present embodiment, the terminals on the reactor 5 can also be electrically connected to the power module 2 through the electrical connector 7.

[0052] Optionally, in this embodiment, the evaporator 31 is installed in a vertical direction, and the power modules 2 are located on two opposite sides of the evaporator 31 to ensure the contact area between the power module 2 and the evaporator 31, thereby improving the cooling effect of the evaporator 31 on the power module 2. Specifically, a plurality of power modules 2 are provided, and the plurality of power modules 2 are located on two opposite sides of the evaporator 31, respectively.

[0053] In this embodiment, if Figure 2 As shown, the condenser 32, the reactor 5 and the capacitor bank group 4 share an external circulation heat dissipation air duct 12, and the cabinet 1 is provided with an air inlet 13 and an air outlet 14 connected to the external circulation heat dissipation air duct 12, and the heat dissipation fan 6 is located in the external circulation heat dissipation air duct 12. Under the action of the suction force of the heat dissipation fan 6, the cold air outside the cabinet 1 enters the external circulation heat dissipation air duct 12 through the air inlet 13, passes through the condenser 32, the capacitor bank group 4 and the reactor 5 in sequence, and finally discharges the hot air formed after the heat exchange from the cabinet 1 through the air outlet 14, thereby achieving air cooling and heat dissipation of the condenser 32, the capacitor bank group 4 and the reactor 5, which not only ensures the heat dissipation effect of the condenser 32, the capacitor bank group 4 and the reactor 5, but also has low cost. In addition, the above-mentioned arrangement enables the condenser 32, the capacitor bank group 4 and the reactor 5 to share a heat dissipation fan 6 in the external circulation heat dissipation air duct 12, further reducing the cost. Furthermore, the entire external circulation heat dissipation air duct 12 is isolated from the environment in the enclosed accommodating space 11 , thereby ensuring the protective effect of the enclosed accommodating space 11 .

[0054] Optionally, in this embodiment, if Figure 1 and Figure 2 As shown, the reactor 5 is located below the power module 2, the condenser 32 is located above the power module 2 and the evaporator 31, the capacitor bank 4 is installed in the vertical direction, and the capacitor bank 4 is located behind the power module 2, so that the structural layout of the entire electrical cabinet is more compact and reasonable. In addition, it should be noted that the air inlet 13 is located above the power module 2 and opposite to the condenser 32, and the air inlet 13 is located on the front side of the cabinet 1, and the air outlet 14 is located below the reactor 5 and on the rear side of the cabinet 1, so as to ensure that the cold air outside the cabinet 1 enters the external circulation heat dissipation air duct 12 through the air inlet 13, and then passes through the condenser 32, the capacitor bank 4 and the reactor 5 in sequence and then is discharged from the cabinet 1 through the air outlet 14.

[0055] It should be noted that, in other embodiments, the air inlet 13 can also be set below the inductor 5, and the air outlet 14 can be set above the power module 2, and the air outlet 14 can be ensured to be directly opposite the condenser 32, so that the cold air outside the cabinet 1 enters the external circulation heat dissipation air duct 12 through the air inlet 13, and then passes through the inductor 5, the capacitor bank 4 and the condenser 32 in sequence before being discharged from the cabinet 1 through the air outlet 14.

[0056] In addition, it should be noted that the present embodiment does not impose any specific limitation on the specific location of the heat dissipation fan 6 in the external circulation heat dissipation air duct 12 , as long as the heat dissipation fan 6 is located in the external circulation heat dissipation air duct 12 .

[0057] In addition, in this embodiment, a reactor air duct enclosure 16 is provided inside the cabinet 1, and the reactor air duct enclosure 16 encloses the required external circulation heat dissipation air duct 12 at the position of the reactor 5 to ensure that the reactor 5 is located in the external circulation heat dissipation air duct 12 formed inside the cabinet 1.

[0058] In this embodiment, if Figure 3 to Figure 5As shown, the condenser 32 is located above the evaporator 31, and the placement position of the condenser 32 is at an angle to the flow direction of the gas in the external circulation heat dissipation duct 12. With the above arrangement, when the liquid cooling medium in the evaporator 31 is heated, the temperature rises and a phase change occurs, gasification occurs, the liquid turns into a gaseous state, the gas density decreases and naturally rises, and after entering the condenser 32, the heat is transferred to the condenser 32, and the condenser 32 exchanges heat with the cold air in the external circulation heat dissipation duct 12, the temperature of the cooling medium decreases, and due to the effect of gravity, it flows back into the evaporator 31 for heat exchange. In addition, by making the placement position of the condenser 32 at an angle to the flow direction of the gas in the external circulation heat dissipation duct 12, the heat exchange area between the condenser 32 and the cold air in the external circulation heat dissipation duct 12 is effectively increased, and the heat exchange effect of the condenser 32 is improved. Optionally, in this embodiment, the phase change heat sink 3 includes two condensers 32, and the two condensers 32 are arranged in a V shape, so that the structure of the arrangement of the two condensers 32 is more compact, and the heat exchange area between the condenser 32 and the cold air in the external circulation heat dissipation air duct 12 is further increased, thereby improving the heat exchange effect of the condenser 32. Optionally, in other embodiments, the condenser 32 may also be designed to have three or more condensers, and the multiple condensers 32 may be arranged in a Z shape or a W shape.

[0059] Optionally, in this embodiment, the two condensers 32 may share one evaporator 31 , or two evaporators 31 may be provided so that the two evaporators 31 are provided in a one-to-one correspondence with the two condensers 32 .

[0060] It should be noted that, in this embodiment, the condenser 32 and the evaporator 31 are separated by a partition, and the connecting pipe between the condenser 32 and the evaporator 31 can pass through the partition, as long as the sealing of the connecting pipe passing through the partition is ensured. For example, a sealant is applied or a sealing ring is sandwiched at the position where the connecting pipe passes through the partition.

[0061] In this embodiment, the condenser 32 includes a steam collecting pipe 321, a liquid collecting pipe 322 and a plurality of condensing pipes 323, and the phase change radiator 3 also includes a connecting steam pipe 33 and a connecting liquid pipe 34, wherein the evaporator 31 is connected to the steam collecting pipe 321 through the connecting steam pipe 33, and the liquid collecting pipe 322 is connected to the evaporator 31 through the connecting liquid pipe 34, and the plurality of condensing pipes 323 are connected in parallel between the steam collecting pipe 321 and the liquid collecting pipe 322. When the liquid cooling medium in the evaporator 31 is heated, the temperature rises and a phase change and gasification occurs, the liquid turns into a gas, the gas density decreases and naturally rises, and enters the steam collecting pipe 321 in the condenser 32 through the connecting steam pipe 33, and then enters each condensing pipe 323, and exchanges heat with the cold air in the external circulation heat dissipation air duct 12 in the condensing pipe 323, the temperature of the cooling medium decreases, and due to the action of gravity, it enters the liquid collecting pipe 322, and flows back into the evaporator 31 through the connecting liquid pipe 34 for heat exchange.

[0062] It should be noted that, in the present embodiment, the connecting steam pipe 33 and the connecting liquid pipe 34 may be in the form of independent pipes. In other embodiments, the connecting steam pipe 33 and the connecting liquid pipe 34 may both be built into a protective pipe. The connecting steam pipe 33 and the connecting liquid pipe 34 may also be two independent flow channels arranged in the same pipe, making it more beautiful.

[0063] Optionally, in this embodiment, if Figure 4 As shown, a condenser air duct enclosure 15 is provided inside the cabinet 1, and the condenser air duct enclosure 15 encloses the outer circulation heat dissipation air duct 12 required at the position of the condenser 32, and a vent 151 for circulation is also provided on the condenser air duct enclosure 15 to ensure that the condenser 32 is located in the outer circulation heat dissipation air duct 12 formed inside the cabinet 1. It should be noted that the partition between the condenser 32 and the evaporator 31 is a part of the condenser air duct enclosure 15.

[0064] Embodiment 2

[0065] The electrical cabinet provided in this embodiment is basically the same as that in the first embodiment. The electrical cabinet provided in this embodiment is different from that in the first embodiment in that:

[0066] like Figure 6 and Figure 7 As shown, the external circulation heat dissipation air duct 12 includes a first external circulation heat dissipation air duct 121 and a second external circulation heat dissipation air duct 122 which are independent of each other, wherein a first air inlet 131 and a first air outlet 141 which are connected to the first external circulation heat dissipation air duct 121 are provided on the cabinet 1, and a second air inlet 132 and a second air outlet 142 which are connected to the second external circulation heat dissipation air duct 122 are also provided on the cabinet 1, the condenser 32 and the capacitor body 41 in the capacitor bank group 4 are both located in the first external circulation heat dissipation air duct 121, and the reactor 5 is located in the second external circulation heat dissipation air duct 122. The above arrangement enables the condenser 32 and the capacitor body 41 in the capacitor bank group 4 to share the first external circulation heat dissipation air duct 121 for heat dissipation, thereby reducing costs.

[0067] In addition, in this embodiment, the electrical cabinet also includes a first cooling fan 61 and a second cooling fan 62, wherein the first cooling fan 61 is located in the first external circulation cooling air duct 121 to improve the ventilation and heat dissipation effect of the first external circulation cooling air duct 121, and the second cooling fan 62 is located in the second external circulation cooling air duct 122 to improve the ventilation and heat dissipation effect of the second external circulation cooling air duct 122.

[0068] Alternatively, if Figure 6As shown, the first air inlet 131 is located above the power module 2 and opposite to the condenser 32, and the first air inlet 131 is located on the front side of the cabinet 1, and the first air outlet 141 is located below the capacitor body 41 and on the rear side of the cabinet 1. Under the action of the suction force of the first cooling fan 61, the cold air outside the cabinet 1 enters into the first external circulation cooling air duct 121 through the first air inlet 131, passes through the condenser 32 and the capacitor body 41 of the capacitor group 4 in turn, and finally the hot air formed after heat exchange is discharged from the cabinet 1 through the first air outlet 141.

[0069] Alternatively, if Figure 7 As shown, the first air inlet 131 can also be located below the capacitor body 41 and on the front side of the cabinet 1, and the first air outlet 141 is located above the power module 2 and on the front side of the cabinet 1, and the first air outlet 141 is opposite to the condenser 32, so that under the action of the suction force of the first cooling fan 61, the cold air outside the cabinet 1 enters into the first external circulation cooling air duct 121 through the first air inlet 131, passes through the capacitor body 41 and the condenser 32 of the capacitor group 4 in turn, and finally discharges the hot air formed after heat exchange out of the cabinet 1 through the first air outlet 141.

[0070] In this embodiment, if Figure 6 and Figure 7 As shown, the second air inlet 132 is located at the bottom of the cabinet 1, and the second air outlet 142 is located above the reactor 5 and at the rear side of the cabinet 1. Under the action of the suction force of the second cooling fan 62, the cold air outside the cabinet 1 enters into the second external circulation cooling air duct 122 through the second air inlet 132, and the hot air formed after heat exchange after passing through the reactor 5 is discharged from the cabinet 1 through the second air outlet 142.

[0071] Embodiment 3

[0072] The electrical cabinet provided in this embodiment is basically the same as that in the first embodiment. The electrical cabinet provided in this embodiment is different from that in the first embodiment in that:

[0073] like Figure 8 As shown, in this embodiment, the external circulation heat dissipation air duct 12 includes a first external circulation heat dissipation air duct 121 and a second external circulation heat dissipation air duct 122 which are independent of each other, wherein a first air inlet 131 and a first air outlet 141 which are connected to the first external circulation heat dissipation air duct 121 are provided on the cabinet 1, and a second air inlet 132 and a second air outlet 142 which are connected to the second external circulation heat dissipation air duct 122 are also provided on the cabinet 1, the condenser 32 is located in the first external circulation heat dissipation air duct 121, and the capacitor body 41 and the reactor 5 in the capacitor bank group 4 are both located in the second external circulation heat dissipation air duct 122. The above arrangement enables the reactor 5 and the capacitor body 41 in the capacitor bank group 4 to share the second external circulation heat dissipation air duct 122 for ventilation and heat dissipation, thereby reducing costs.

[0074] In addition, in this embodiment, the electrical cabinet also includes a first cooling fan 61 and a second cooling fan 62, wherein the first cooling fan 61 is located in the first external circulation cooling air duct 121 to improve the ventilation and heat dissipation effect of the first external circulation cooling air duct 121, and the second cooling fan 62 is located in the second external circulation cooling air duct 122 to improve the ventilation and heat dissipation effect of the second external circulation cooling air duct 122.

[0075] Optionally, in this embodiment, the first air inlet 131 is located above the power module 2 and opposite to the condenser 32, and the first air inlet 131 is located on the front side of the cabinet 1, the first air outlet 141 is located above the power module 2 and opposite to the condenser 32, and the first air outlet 141 is located on the rear side of the cabinet 1. Under the action of the suction force of the first cooling fan 61, the cold air outside the cabinet 1 enters into the first external circulation cooling air duct 121 through the first air inlet 131, and after passing through the condenser 32, the hot air formed after heat exchange is discharged from the cabinet 1 through the first air outlet 141.

[0076] In this embodiment, if Figure 8 As shown, the second air inlet 132 is located above the capacitor body 41 and at the rear side of the cabinet 1, and the second air outlet 142 is located below the reactor 5 and at the rear side of the cabinet 1. Under the action of the suction force of the second cooling fan 62, the cold air outside the cabinet 1 enters into the second external circulation cooling air duct 122 through the second air inlet 132, and after passing through the capacitor body 41 and the reactor 5 in turn, the hot air formed after heat exchange is discharged from the cabinet 1 through the second air outlet 142.

[0077] Optionally, in other embodiments, the cold air outside the cabinet 1 enters the second external circulation heat dissipation air duct 122 through the second air inlet 132 , or first passes through the reactor 5 , then passes through the capacitor body 41 and is discharged from the cabinet 1 through the second air outlet 142 .

[0078] Embodiment 4

[0079] The electrical cabinet provided in this embodiment is basically the same as that in the first embodiment. The electrical cabinet provided in this embodiment is different from that in the first embodiment in that:

[0080] like Fig. 9As shown, in the present embodiment, the external circulation heat dissipation duct 12 comprises a first external circulation heat dissipation duct 121, a second external circulation heat dissipation duct 122 and a third external circulation heat dissipation duct 123 which are independent of each other, wherein a first air inlet 131 and a first air outlet 141 which are connected to the first external circulation heat dissipation duct 121 are provided on the cabinet 1, a second air inlet 132 and a second air outlet 142 which are connected to the second external circulation heat dissipation duct 122 are also provided on the cabinet 1, a third air inlet 133 and a third air outlet 143 which are connected to the third external circulation heat dissipation duct 123 are also provided on the cabinet 1, the condenser 32 is located in the first external circulation heat dissipation duct 121, the capacitor body 41 in the capacitor bank group 4 is located in the second external circulation heat dissipation duct 122, and the reactor 5 is located in the third external circulation heat dissipation duct 123. The above arrangement enables the condenser 32 , the reactor 5 and the capacitor body 41 to dissipate heat through independent air ducts respectively, further improving the ventilation and heat dissipation effects of the condenser 32 , the reactor 5 and the capacitor body 41 .

[0081] Optionally, in this embodiment, the electrical cabinet also includes a first cooling fan 61, a second cooling fan 62 and a third cooling fan 63, wherein the first cooling fan 61 is located in the first external circulation cooling air duct 121 to promote the ventilation and cooling effect of the first external circulation cooling air duct 121, the second cooling fan 62 is located in the second external circulation cooling air duct 122 to promote the ventilation and cooling effect of the second external circulation cooling air duct 122, and the third cooling fan 63 is located in the third external circulation cooling air duct 123 to promote the ventilation and cooling effect of the third external circulation cooling air duct 123.

[0082] Optionally, in this embodiment, the first air inlet 131 is located above the power module 2 and opposite to the condenser 32, and the first air inlet 131 is located on the front side of the cabinet 1, the first air outlet 141 is located above the power module 2 and opposite to the condenser 32, and the first air outlet 141 is located on the rear side of the cabinet 1. Under the action of the suction force of the first cooling fan 61, the cold air outside the cabinet 1 enters into the first external circulation cooling air duct 121 through the first air inlet 131, and after passing through the condenser 32, the hot air formed after heat exchange is discharged from the cabinet 1 through the first air outlet 141.

[0083] Optionally, in this embodiment, the second air inlet 132 is located below the capacitor body 41 and on the front side of the cabinet 1, and the second air outlet 142 is located above the capacitor body 41 and on the rear side of the cabinet 1. Under the action of the suction force of the second cooling fan 62, the cold air outside the cabinet 1 enters the second external circulation cooling air duct 122 through the second air inlet 132, and after passing through the capacitor body 41, the hot air formed after heat exchange is discharged from the cabinet 1 through the second air outlet 142.

[0084] Optionally, in this embodiment, the third air inlet 133 is located at the bottom of the cabinet 1, and the third air outlet 143 is located above the reactor 5 and at the rear side of the cabinet 1. Under the action of the suction force of the third cooling fan 63, the cold air outside the cabinet 1 enters into the third external circulation cooling air duct 123 through the third air inlet 133, and the hot air formed after heat exchange after passing through the reactor 5 is discharged from the cabinet 1 through the third air outlet 143.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An electrical cabinet, characterized in that: include: A cabinet (1), wherein the cabinet (1) is provided with mutually independent enclosed accommodating spaces (11) and an external circulation heat dissipation air duct (12); A first heat dissipation device, the first heat dissipation device being accommodated in the enclosed accommodation space (11); A phase-change heat sink (3), the phase-change heat sink (3) comprising an evaporator (31) and a condenser (32) which are connected to each other, the evaporator (31) being located in the enclosed accommodation space (11) and being in contact with the first heat dissipation device, and the condenser (32) being located in the external circulation heat dissipation air duct (12); as well as A second heat dissipation device, wherein the second heat dissipation device is located in the external circulation heat dissipation air duct (12).

2. The electrical cabinet according to claim 1, characterized in that: The first heat dissipation device comprises a power module (2), the power module (2) being accommodated in the enclosed accommodation space (11), and the second heat dissipation device comprises a capacitor bank (4) and a reactor (5), the capacitor bank (4) and the reactor (5) being electrically connected to the power module (2), and the capacitor bank (4) and the reactor (5) being located in the external circulation heat dissipation air duct (12).

3. The electrical cabinet according to claim 2, characterized in that: The cabinet body (1) is provided with an air inlet (13) and an air outlet (14) which are connected to the external circulation heat dissipation air duct (12), and the electrical cabinet further comprises: A heat dissipation fan (6), wherein the heat dissipation fan (6) is located in the external circulation heat dissipation air duct (12).

4. The electrical cabinet according to claim 2, characterized in that: The external circulation heat dissipation air duct (12) comprises a first external circulation heat dissipation air duct (121) and a second external circulation heat dissipation air duct (122) which are independent of each other; the cabinet (1) is provided with a first air inlet (131) and a first air outlet (141) which are connected to the first external circulation heat dissipation air duct (121); the cabinet (1) is also provided with a second air inlet (132) and a second air outlet (142) which are connected to the second external circulation heat dissipation air duct (122); the condenser (32) and the capacitor bank (4) are both located in the first external circulation heat dissipation air duct (121); and the reactor (5) is located in the second external circulation heat dissipation air duct (122).

5. The electrical cabinet according to claim 2, characterized in that: The external circulation heat dissipation air duct (12) comprises a first external circulation heat dissipation air duct (121) and a second external circulation heat dissipation air duct (122) which are independent of each other; the cabinet (1) is provided with a first air inlet (131) and a first air outlet (141) which are connected to the first external circulation heat dissipation air duct (121); the cabinet (1) is also provided with a second air inlet (132) and a second air outlet (142) which are connected to the second external circulation heat dissipation air duct (122); the condenser (32) is located in the first external circulation heat dissipation air duct (121); and the capacitor bank (4) and the reactor (5) are both located in the second external circulation heat dissipation air duct (122).

6. The electrical cabinet according to claim 4 or 5, characterized in that: The electrical cabinet also includes: a first heat dissipation fan (61), the first heat dissipation fan (61) being located in the first external circulation heat dissipation air duct (121); and A second heat dissipation fan (62), wherein the second heat dissipation fan (62) is located in the second external circulation heat dissipation air duct (122).

7. The electrical cabinet according to claim 2, characterized in that: The external circulation heat dissipation air duct (12) comprises a first external circulation heat dissipation air duct (121), a second external circulation heat dissipation air duct (122) and a third external circulation heat dissipation air duct (123) which are independent of each other; the cabinet (1) is provided with a first air inlet (131) and a first air outlet (141) which are connected to the first external circulation heat dissipation air duct (121); the cabinet (1) is also provided with a second air inlet (132) and a second air outlet (142) which are connected to the second external circulation heat dissipation air duct (122); the cabinet (1) is also provided with a third air inlet (133) and a third air outlet (143) which are connected to the third external circulation heat dissipation air duct (123); the condenser (32) is located in the first external circulation heat dissipation air duct (121); the capacitor bank (4) is located in the second external circulation heat dissipation air duct (122); and the reactor (5) is located in the third external circulation heat dissipation air duct (123).

8. The electrical cabinet according to claim 7, characterized in that: The electrical cabinet also includes: A first cooling fan (61), wherein the first cooling fan (61) is located in the first external circulation cooling air duct (121); a second heat dissipation fan (62), the second heat dissipation fan (62) being located in the second external circulation heat dissipation air duct (122); and A third heat dissipation fan (63), the third heat dissipation fan (63) is located in the third external circulation heat dissipation air duct (123).

9. The electrical cabinet according to any one of claims 1 to 5, 7 and 8, characterized in that: There is an angle between the placement position of the condenser (32) and the flow direction of the gas in the external circulation heat dissipation air duct (12).

10. The electrical cabinet according to claim 9, characterized in that: The phase-change heat sink (3) comprises two condensers (32), and the two condensers (32) are arranged in a V shape.

11. The electrical cabinet according to any one of claims 2 to 5, 7 and 8, characterized in that: The evaporator (31) is installed in a vertical direction, and the power module (2) is located on two opposite sides of the evaporator (31).

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