An electrical cabinet

Abstract

The application discloses an electrical cabinet, comprising a cabinet body, an air-cooled heat exchanger and a protection assembly, the cabinet body is provided with a relatively closed protection cavity and a first ventilation cavity located above the protection cavity, the projection of the protection cavity and the first ventilation cavity along the vertical direction at least partially overlaps; the protection cavity and the first ventilation cavity are separated by a supporting plate, the supporting plate is provided with a hot air return air outlet and a cold air outlet; the air-cooled heat exchanger is placed in the first ventilation cavity and supported on the supporting plate, and is communicated with the hot air return air outlet and the cold air outlet to cool the hot air of the hot air return air outlet into the cold air of the cold air outlet; the protection assembly is placed in the protection cavity, and is adapted to dissipate heat by the circulating air flow from the cold air outlet to the hot air return air outlet. The application occupies small space in the X or Y direction, and the heat dissipation efficiency of the protection assembly is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the electrical technical field, in particular to an electrical cabinet. BACKGROUND

[0002] The electrical cabinet such as photovoltaic inverter, energy storage converter cabinet, etc. usually includes high protection components such as IGBT power module, capacitor module, etc. The IGBT power module and capacitor module have high heat dissipation requirements and protection requirements, among which the heat generation of IGBT is relatively large. In the prior art, a relatively independent and closed protection cavity is usually arranged to accommodate the high protection components such as IGBT power module and capacitor module, and a heat exchanger is arranged in the protection cavity to dissipate heat. The heat exchanger is usually arranged in the protection cavity and mounted on the side wall of the cabinet or directly mounted on the side wall of the cabinet. When the heat exchanger is arranged in the protection cavity, the internal space of the protection cavity is occupied, so the volume of the protection cavity must be increased. When the heat exchanger is arranged on the side wall of the cabinet, the overall electrical cabinet needs to occupy more space in the X-axis direction or Y-axis direction. Therefore, no matter which scheme is adopted, the overall cabinet occupies a large space in the X-axis or Y-axis direction. When multiple electrical cabinets are used side by side, this disadvantage is more prominent. In addition, since the heat exchanger is arranged on the side wall of the cabinet, the external circulation air duct of the heat exchanger usually extends in the vertical direction. Generally, the air inlet of the external circulation air duct is located at the lower part and the air outlet is located at the upper part. Therefore, the air inlet of the heat exchanger is usually close to the ground. When the electrical cabinet is used outdoors, the ground temperature is relatively high, so the temperature of the air inlet of the heat exchanger is relatively high, which reduces the overall heat dissipation efficiency of the protection cavity. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems in the background art, and provide an electrical cabinet which occupies a small space in the X-axis or Y-axis direction and has high heat dissipation efficiency of the protection components.

[0004] To achieve the above-mentioned purpose, the present application and its related embodiments adopt the following technical solutions, but are not limited to the following solutions:

[0005] The first technical solution and its related embodiments relate to an electrical cabinet, which includes a cabinet body provided with a relatively closed protection cavity and a first ventilation cavity located above the protection cavity. The projection of the protection cavity and the first ventilation cavity in the vertical direction at least partially overlaps. The protection cavity and the first ventilation cavity are separated by a support plate, and the support plate is provided with a hot air return air outlet and a cold air outlet. A heat exchanger is arranged in the first ventilation cavity and supported on the support plate. The heat exchanger is in communication with the hot air return air outlet and the cold air outlet to cool the hot air of the hot air return air outlet into the cold air of the cold air outlet. A protection component is arranged in the protection cavity and is adapted to be cooled by the circulating air flow from the cold air outlet to the hot air return air outlet.

[0006] The second technical solution is based on the first technical solution, which is a preferred embodiment of the first technical solution, wherein the cabinet body is provided with a first side wall and a second side wall opposite to each other and extending in the vertical direction along the X-axis direction, the first side wall is provided with a first air inlet corresponding to the first ventilation cavity, and the second side wall is provided with a first air outlet corresponding to the first ventilation cavity.

[0007] The third technical solution is based on the second technical solution, which is a preferred embodiment of the second technical solution, wherein a heat exchange device is further included; the cabinet body is further provided with a second ventilation cavity located above the protection cavity, and the projection of the protection cavity and the second ventilation cavity in the vertical direction at least partially overlaps; the heat exchange device includes a liquid cooling unit placed in the second ventilation cavity and a radiator in communication with the cooling flow channel of the liquid cooling unit, and the radiator is placed in the protection cavity and is adapted to dissipate heat for at least part of the protection assembly.

[0008] The fourth technical solution is based on the third technical solution, which is a preferred embodiment of the third technical solution, wherein the second ventilation cavity is located above the first ventilation cavity and at the top of the cabinet body; the projection of the protection cavity in the vertical direction covers the first ventilation cavity and the second ventilation cavity; the first side wall is provided with a second air inlet corresponding to the second ventilation cavity; the top of the second ventilation cavity is provided with a second air outlet; and the first air outlet is adapted to blow air upward.

[0009] The fifth technical solution is based on the fourth technical solution, which is a preferred embodiment of the fourth technical solution, wherein the protection cavity is provided with a partition plate extending in the vertical direction near the first side wall, the partition plate divides the protection cavity into a wind passing cavity near the first side wall for passing wind only and a containing cavity near the second side wall along the X-axis direction, the wind passing cavity and the containing cavity are in communication with the cold air outlet and the hot air return air outlet respectively, and the hot air return air outlet is near the second side wall; a plurality of wind passing openings are arranged on the partition plate in the vertical direction, and at least part of the wind passing openings are located at the bottom of the partition plate; and the protection assembly is adapted to dissipate heat by the circulating air flow from the wind passing opening to the hot air return air outlet.

[0010] The sixth technical solution is based on the fifth technical solution, which is a preferred embodiment of the fifth technical solution, wherein a wind guide member is further included; the hot air return air outlet and the cold air outlet correspond to the top of the containing cavity; the wind guide member extends along the X-axis direction, the upper end of the wind guide member is in communication with the cold air outlet, the end of the wind guide member near the hot air return air outlet is provided with a first exhaust air outlet for blowing air downward to the containing cavity, and the end of the wind guide member away from the hot air return air outlet is provided with a second exhaust air outlet for blowing air to the wind passing cavity.

[0011] The seventh technical solution is based on the sixth technical solution, which is a preferred embodiment of the sixth technical solution, further comprising a second centrifugal fan; the cabinet body is further provided with a cover body, which is arranged at the bottom of the accommodating cavity and forms an independent heat dissipation air duct, the cover body comprises a vertical section and two horizontal sections extending along the X-axis direction, and the two horizontal sections are respectively located at the two ends of the Y-axis direction at the top of the vertical section; the bottom of the cabinet body is provided with a third air inlet communicated with the bottom end of the vertical section, and the second side wall is provided with a third air outlet communicated with the two horizontal sections and adapted to upward air outlet; the protection assembly comprises an electric reactor arranged in the vertical section; the second centrifugal fan is arranged in the horizontal section and is adapted to guide the airflow in the vertical section to the third air outlet along the X-axis direction; the projection of the vertical section and the air passage at the bottom along the X-axis direction are staggered along the Y-axis direction.

[0012] The eighth technical solution is based on the seventh technical solution, which is a preferred embodiment of the seventh technical solution, wherein the protection assembly is provided with a first electrical component close to the partition plate and a second electrical component spaced apart from the first electrical component along the X-axis direction close to the partition plate, the second electrical component is a capacitor module, the capacitor module comprises an electrical plate member in a plate-shaped structure and adapted to carry a plurality of electrical units, the electrical plate member extends along the vertical direction and forms an air passage with the first electrical component; the top of the vertical section of the cover body is provided with a wind guide surface inclined relative to the vertical direction and the X-axis direction corresponding to the air passage to make the airflow in the air passage adapted to flow downward obliquely.

[0013] The ninth technical solution is based on the eighth technical solution, which is a preferred embodiment of the eighth technical solution, wherein the protection assembly further comprises a third electrical component, a fourth electrical component, a fifth electrical component and a sixth electrical component; the third electrical component is close to the partition plate and below the first electrical component, and the air passage is at least partially located between the first electrical component and the third electrical component; the fourth electrical component is arranged at the bottom of the accommodating cavity close to the second side wall, the cover body is provided with two wind guide surfaces gradually away from top to bottom along the X-axis direction, the third electrical component is located downstream of the airflow guided by one of the wind guide surfaces, and the fourth electrical component is located downstream of the airflow guided by the other wind guide surface; the fifth electrical component is close to the hot air return air outlet, and the radiator is used for heat dissipation of the fifth electrical component; the sixth electrical component is arranged at the bottom of the accommodating cavity close to the air passage at the bottom; the first electrical component is a direct current electrical component; the third electrical component is a fuse; the fourth electrical component is an alternating current electrical component; the fifth electrical component is a power module, and the sixth electrical component is an auxiliary transformer.

[0014] The tenth technical solution is based on any one of the fifth to ninth technical solutions, and is a preferred embodiment of any one of the fifth to ninth technical solutions, wherein the cabinet body is provided with a first movable door and a second movable door at a first end and a second end thereof along the X-axis direction, and the first movable door and the second movable door form the first side wall and the second side wall respectively when fixed, and the partition plate is close to the first end; the second side wall is adapted to be sealingly connected with the two horizontal sections of the cover body to make the horizontal sections communicate with the third air outlet.

[0015] From the above description of the present application and its specific embodiments, relative to the prior art, the technical solution of the present application and its related embodiments have the following beneficial effects due to the use of the following technical means:

[0016] The applicant has found through continuous observation, experiment and research that in the prior art, the reason for causing the technical problem of "large floor area of the electrical cabinet and poor heat dissipation efficiency of the protection cavity" is that the air-cooled heat exchanger is installed on the side wall of the cabinet body and its air inlet is close to the ground.

[0017] In the first technical solution and related embodiments, the first ventilation cavity is located above the protection cavity, the air-cooled heat exchanger is placed in the first ventilation cavity, and the projection of the protection cavity and the first ventilation cavity along the vertical direction at least partially overlaps, so that the air-cooled heat exchanger does not occupy the internal space of the protection cavity or the side space of the cabinet body. The above arrangement fully utilizes the height space of the cabinet body, thereby reducing the occupied space of the cabinet body in the X-axis direction or the Y-axis direction. When the projection of the protection cavity and the first ventilation cavity along the vertical direction completely overlaps, the overall floor area of the electrical cabinet is minimized and the projection area on the ground along the vertical direction is minimized, that is, the space occupied by the electrical cabinet in the X-axis direction and the Y-axis direction is greatly reduced. When multiple electrical cabinets are used side by side along the X-axis direction or the Y-axis direction, the required floor area of the multiple side-by-side electrical cabinets can be reduced as a whole. Since the first ventilation cavity is located above the protection cavity, the air inlet of the first ventilation cavity is necessarily away from the ground, so that the air inlet temperature of the air-cooled heat exchanger is relatively low, thereby ensuring that the air flow of the cold air outlet always has a relatively low temperature, that is, ensuring that the protection cavity has a high heat dissipation efficiency. Thus, the present technical solution can reduce the space of the electrical cabinet in the X-axis direction or the Y-axis direction, and make the air inlet of the outer circulation air duct of the air-cooled heat exchanger away from the ground, thereby improving the heat dissipation efficiency of the protection assembly.

[0018] In the second technical solution and the related embodiments, the first air inlet and the first air outlet of the first ventilation cavity are located on the first side wall and the second side wall of the cabinet body, respectively, that is, the first air inlet and the first air outlet of the first ventilation cavity are located on the two sides of the cabinet body. In actual application, the first air inlet and the first air outlet of the first ventilation cavity are in communication with the outer circulation air duct of the air-cooled heat exchanger. Therefore, the above arrangement avoids the short circuit of hot air flow caused by the backflow of hot air from the first air outlet to the first air inlet, thereby improving the heat dissipation efficiency of the protection assembly. Since the first air inlet and the first air outlet are located on the first side wall and the second side wall, respectively, the above arrangement also creates conditions for the electrical cabinet to be arranged along the Y-axis direction.

[0019] In the third technical solution and the related embodiments, the arrangement of the heat exchange device enables the protection assembly in the protection cavity to be mainly cooled by liquid cooling and air cooling. The liquid cooling has high heat dissipation efficiency. Since the air-cooled heat exchanger and the liquid cooling unit are both cooled by external circulation, the protection property of the protection cavity can be improved. The combination of liquid cooling and air cooling can maximize the heat dissipation efficiency of the protection assembly in the protection cavity, and the protection property of the protection cavity is good. The second ventilation cavity is located above the protection cavity, and the projection of the protection cavity and the second ventilation cavity along the vertical direction at least partially overlaps. The above arrangement makes full use of the height space of the cabinet body, thereby reducing the occupied space of the cabinet body in the X-axis direction or the Y-axis direction. When the projection of the protection cavity and the second ventilation cavity along the vertical direction completely overlaps, the overall floor area of the electrical cabinet is minimized, and the projection area of the electrical cabinet on the ground along the vertical direction is minimized. That is, the electrical cabinet occupies much less space in the X-axis direction and the Y-axis direction. When multiple electrical cabinets are used side by side along the X-axis direction or the Y-axis direction, the floor area required by the multiple electrical cabinets used side by side can be reduced as a whole. In addition, the above arrangement also makes the air inlet of the second ventilation cavity far away from the ground, thereby having a lower air inlet temperature, so that the heat dissipation efficiency of the liquid cooling unit is high. Since the liquid cooling unit does not have water inlet concerns, the air outlet of the second ventilation cavity does not have to be necessarily arranged on the side of the cabinet body, but can be arranged on the top of the cabinet body. Therefore, when multiple electrical cabinets are used side by side, the hot air flow is less likely to disturb the downstream electrical cabinet. Even if the hot air flow flows out from the side of the top of the cabinet body, the hot air is less likely to affect the downstream electrical cabinet due to its small density.

[0020] In the fourth technical solution and related embodiments, the projection of the protection cavity in the vertical direction covers the first ventilation cavity and the second ventilation cavity, so that the overall electrical cabinet occupies a small space in the X-axis direction, which is conducive to reducing the required floor area of multiple electrical cabinets when the cabinets are combined; wherein the top of the second ventilation cavity is provided with a second air outlet, and the first air outlet is adapted to discharge air upward, so that the electrical cabinet forms an upward air outlet structure. Since hot air has a lower density, the hot air discharged from the first air outlet and the second air outlet is not easy to flow downward into the downstream electrical cabinet, so that when multiple electrical cabinets are used side by side along the X-axis direction, the hot air from the air outlet of the upstream electrical cabinet will not affect the air inlet of the downstream electrical cabinet. In addition, the water inlet surface that may exist in the protection cavity is reduced. In this technical solution, the water inlet surface is mainly formed on the support plate. Compared with the solution in which the liquid cooling unit is located above the protection cavity and the air-cooled heat exchanger is located on the side of the protection cavity, the part of the protection cavity connected with the external circulation heat dissipation is reduced. As is well known to those skilled in the art, the external circulation part needs to be waterproofed, so the above-mentioned arrangement reduces the water inlet surface that may exist in the protection cavity, improves the protection of the protection cavity, and reduces the protection cost.

[0021] In the fifth technical solution and related embodiments, the over-flowing cavity is only used for over-flowing, that is, the over-flowing cavity is not used for placing protection components, so in actual operation, the length of the over-flowing cavity in the X-axis direction can be minimized and the length of the containing cavity in the X-axis direction can be maximized. Such an arrangement is conducive to increasing the wind pressure and flow rate of the air flow in the over-flowing cavity, facilitating the air outlet of the over-flowing port and the rapid flow of the air flow in the containing cavity, thereby creating conditions for improving the heat dissipation efficiency of the protection components, while providing a larger space for the containing cavity; wherein the arrangement of the over-flowing cavity and the over-flowing port allows the cold air from the cold air outlet to flow into the containing cavity with relatively low pressure through the over-flowing port after flowing into the over-flowing cavity. In actual application, over-flowing ports can be opened on the partition plate for places in the containing cavity where air is not easy to flow, thereby avoiding the formation of air flow blind areas in the containing cavity. In this technical solution, at least part of the over-flowing ports are located at the bottom of the partition plate. Since the hot air return port is close to the second side wall, the cold air flowing out of the over-flowing port can flow through the bottom of the containing cavity and then flow upward, thereby avoiding the formation of air flow blind areas at the bottom of the containing cavity and on one side of the second side wall. Since the over-flowing ports on the partition plate are arranged in the vertical direction, multiple layers of cold air flow can be formed in the vertical direction. The multiple layers of cold air flow can simultaneously carry away the heat of the protection components during the flow to the hot air return port, thereby improving the heat dissipation efficiency of the protection components, and allowing the air flow to be distributed throughout the containing cavity without the need for a turbulence fan, which is convenient for later maintenance.

[0022] In the sixth technical solution and the related embodiments, the air guide member is arranged such that the distance between the cold air outlet and the hot air return inlet is short, facilitating the arrangement of the air-cooled heat exchanger. The hot air return inlet and the cold air outlet are both located above the accommodating cavity, and the air flow of the cold air outlet is guided by the air guide member to flow into the air passing cavity in a direction away from the hot air return inlet, so that the length of the air passing cavity in the X-axis direction can be reduced as much as possible, so that the air flow flowing into the air passing cavity from the second air outlet can be accelerated and pressurized in the air passing cavity, and then accelerated again when flowing out through the air passing opening, so that the heat of the protection assembly can be quickly taken away; wherein the protection assembly is also adapted to dissipate heat by the circulating air flow from the first air outlet to the hot air return inlet, so that multiple clusters of cold air flow in different directions can be formed in the accommodating cavity, further avoiding the air flow blind area and improving the heat dissipation efficiency. In actual application, the part of the protection assembly with relatively low heat generation can be placed at the first air outlet to ensure balanced heat dissipation of the protection assembly.

[0023] In the seventh technical solution and the related embodiments, the cover body includes a vertical section and two horizontal sections, the two horizontal sections are respectively located at both ends of the vertical section in the Y-axis direction, and the outer wall of the horizontal section can guide the air flow of the air passing opening to the second side wall, further avoiding the air flow blind area in the accommodating cavity, and the inner wall of the two horizontal sections is more conducive to the air pressure balance in the vertical section, thereby being more conducive to air outlet and heat dissipation. In addition, the structure of the cover body makes the air flow in the vertical section more easily enter the second centrifugal fan, and the air outlet is smoother. The reactor is arranged in the vertical section of the cover body, which is conducive to the installation of the heavy reactor, and the second centrifugal fan is arranged in the horizontal section, which is conducive to the reversing of the air flow and reduces the floor area compared with the axial flow fan; the projection of the vertical section and the air passing opening located at the bottom along the X-axis direction is staggered along the Y-axis direction, avoiding the cover body blocking the air flow of the air passing opening. The third air outlet is adapted to upward air outlet, so that the electrical cabinet as a whole forms an upward air outlet structure, further avoiding the influence on the downstream electrical cabinet.

[0024] In the eighth technical solution and the related embodiments, the second electrical component is a capacitor module, and the air passing channel is formed between the electrical plate component of the capacitor module and the first electrical component, fully utilizing the structure of the capacitor module itself to form the air passing channel; wherein the cover body is further provided with an air guide surface to make the air flow of the air passing channel inclined downward, and this part of cold air can further flow to the air flow blind area or the area with smaller air volume, thereby improving the overall heat dissipation efficiency of the protection assembly. Therefore, the above arrangement fully utilizes the structure of the cover body and the layout of the reactor in the accommodating cavity to form the air channel, which is ingenious in structure.

[0025] In the ninth technical solution and the related embodiments, the air passage is at least partially located between the first electrical component and the third electrical component, so that the first electrical component and the second electrical component can be cooled by the cold air discharged from the first air outlet, and the third electrical component can be cooled by the cold air discharged from the air passage, and the cooling efficiency is high. The air guide surface of the cover body can guide the air flow of the first air outlet to the third electrical component and the fourth electrical component respectively, and the cooling efficiency of the third electrical component and the fourth electrical component is improved, and the two air guide surfaces are beneficial to the rotation of the air flow in the vertical section, thereby being beneficial to the air outlet of the horizontal section. The fifth electrical component is cooled by the radiator, and thus the temperature of the fifth electrical component as a whole is not high. Placing the fifth electrical component close to the hot air return air outlet is beneficial to the balanced cooling of the electrical components. The above layout also makes the wiring of the first to fifth electrical components convenient.

[0026] In the tenth technical solution and the related embodiments, the first movable door forms a first side wall when being fixed, and the partition plate is close to the first end. In actual application, in order to ensure the protection and the safety of electricity use, a sealing plate is arranged when the first movable door is opened to avoid the direct exposure of the protection assembly, and in order to improve the protection, a sealing strip is usually arranged around the first movable door, and the sealing plate and the first movable door have a spacing when being fixed. Therefore, the technical solution fully utilizes the structure of the cabinet body to form the air passage, that is, the partition plate can exist as the sealing plate of the protection assembly, and can cooperate with the first movable door to form the air passage, thereby maximizing the space of the electrical cabinet along the X-axis direction, and the structure is ingenious and the cost is low. The second movable door forms a second side wall when being fixed, and the second side wall is suitable for being sealed and connected with the two horizontal sections of the cover body to make the horizontal sections communicate with the third air outlet, the air resistance is small, the air outlet is smooth, and the maintenance of the protection cavity is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 For the schematic diagram of the electrical cabinet of the embodiment of the present application Figure 1 ;

[0029] Figure 2 For the schematic diagram of the electrical cabinet of the embodiment of the present application Figure 2 ;

[0030] Figure 3 For the internal schematic diagram of the electrical cabinet of the embodiment of the present application Figure 1 ;

[0031] Figure 4 An internal view of an electrical cabinet according to an embodiment of the present application Figure 2 , wherein the cover hides a horizontal section;

[0032] Figure 5 An internal view of an electrical cabinet according to an embodiment of the present application Figure 4 An internal view of an electrical cabinet according to an embodiment of the present application

[0033] Figure 6 An internal view of an electrical cabinet according to an embodiment of the present application

[0034] Figure 7 An internal view of an electrical cabinet according to an embodiment of the present application

[0035] Figure 8 An internal view of an electrical cabinet according to an embodiment of the present application

[0036] Figure 9 An internal view of an electrical cabinet according to an embodiment of the present application

[0037] Figure 10 An internal view of an electrical cabinet according to an embodiment of the present application Figure 1 ;

[0038] Figure 11 An internal view of an electrical cabinet according to an embodiment of the present application Figure 2 .

[0039] Main reference signs:

[0040] Cabinet body 10; first side wall 11; first air inlet 111; second air inlet 112; second side wall 12; first air outlet 121; third air outlet 122; first abutting wall 13; second abutting wall 14; second air outlet 15; cover 16; vertical section 161; air guiding surface 1611; air guiding surface 1612; horizontal section 162; third air inlet 17; supporting plate 18; hot air return air outlet 181; cold air air outlet 182; partition plate 19; air passing hole 191; protection cavity 01; first ventilation cavity 02; second ventilation cavity 03; accommodating cavity 04; air passing cavity 05; air-cooled heat exchanger 20; heat exchange device 30; liquid-cooled unit 31; radiator 32; air guiding member 40; first air outlet 41; second air outlet 42; protection assembly 50; first electrical component 51; second electrical component 52; electrical plate component 521; third electrical component 53; fourth electrical component 54; electric reactor 55; fifth electrical component 56; sixth electrical component 57; waterproof structure 60; frame body 61; blade 62; first guide plate 63; second guide plate 64. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] In the claims, the specification, and the above drawings of the present application, unless otherwise explicitly limited, the terms "first", "second", or "third" are used only to distinguish different objects, and are not used to describe a particular order.

[0043] In the claims, the specification, and the above drawings of the present application, unless otherwise explicitly limited, for orientation words, such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0044] In the claims, the specification, and the above drawings of the present application, unless otherwise explicitly limited, such as the terms "fixedly connected" or "fixedly connected", should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0045] In the claims, the specification, and the above drawings of the present application, the terms "include", "have" and their variants are intended to mean "include but not limited to".

[0046] In the claims and the specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only refer to the characteristics with one of the above directions and the characteristics with another direction perpendicular to each other, and do not require that it must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" introduced in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. Among them, the X-axis direction can be divided into left and right, the Y-axis direction can be divided into front and back, and the Z-axis direction can be divided into up and down.

[0047] Referring to Figures 1-11 , Figures 1-11An electrical cabinet is shown, comprising a cabinet body 10, an air-cooled heat exchanger 20, a heat exchange device 30, an air guide 40, a protection assembly 50 and a second centrifugal fan (not shown in the figure).

[0048] Referring to Figures 1-2 , the cabinet body 10 is cuboid-shaped, and the cabinet body 10 is provided with a first side wall 11 and a second side wall 12 opposite to each other and extending in the vertical direction along the X-axis direction, and the cabinet body 10 is provided with a first abutting wall 13 and a second abutting wall 14 opposite to each other and extending in the vertical direction along the Y-axis direction.

[0049] Referring to Figures 3-4 , the cabinet body 10 is provided with a relatively closed protection cavity 01 and a first ventilation cavity 02 and a second ventilation cavity 03 located above the protection cavity 01, and the projection of the protection cavity 01 in the vertical direction at least partially overlaps the projections of the first ventilation cavity 02 and the second ventilation cavity 03 in the vertical direction; in this embodiment, the second ventilation cavity 03, the first ventilation cavity 02 and the protection cavity 01 are sequentially arranged from top to bottom, and the projection of the protection cavity 01 in the vertical direction covers the first ventilation cavity 02 and the second ventilation cavity 03. Figures 3-4 In this embodiment, the lengths of the protection cavity 01, the first ventilation cavity 02 and the second ventilation cavity 03 along the X-axis direction and the Y-axis direction are consistent.

[0050] The first side wall 11 is provided with a first air inlet 111 corresponding to the first ventilation cavity 02 and a second air inlet 112 corresponding to the second ventilation cavity 03; the second side wall 12 is provided with a first air outlet 121 corresponding to the first ventilation cavity 02, and the top of the second ventilation cavity 03 is provided with a second air outlet 15. The first air outlet 121 is adapted to blow air upward, and in actual application, an upper air outlet louver can be installed at the first air outlet 121, which belongs to the prior art, and this embodiment will not be described in detail.

[0051] The cabinet body 10 is also provided with a cover body 16, which is at least partially located in the protection cavity 01 or below the protection cavity 01 and forms an independent heat dissipation air duct; Figures 3-4 In this embodiment, the cover body 16 is completely located in the protection cavity 01, and the cover body 16 is placed at the bottom of the protection cavity 01. The cover body 16 comprises a vertical section 161 and two horizontal sections 162 extending along the X-axis direction, and the two horizontal sections 162 are respectively located at the two ends of the vertical section 161 in the Y-axis direction; the bottom of the cabinet body 10 is provided with a third air inlet 17 communicating with the bottom end of the vertical section 161, the vertical section 161 is substantially located in the middle of the protection cavity 01 along the X-axis direction and the Y-axis direction, and the two horizontal sections 162 are respectively close to the first abutting wall 13 and the second abutting wall 14, referring to Figure 4 and Figure 6The top of the vertical section 161 is provided with a wind guiding surface 1611 parallel to the X-axis and the Y-axis and two wind guiding surfaces 1612 located at the two ends of the wind guiding surface 1611 along the X-axis direction, the two wind guiding surfaces 1612 are arranged along the X-axis direction and gradually away from each other in an eight-shaped manner from top to bottom.

[0052] The third air inlet 17 of the heat dissipation air duct is formed on the first side wall 11, the second side wall 12, the first abutting wall 13 and the second abutting wall 14. The second side wall 12 is provided with a third air outlet 122 communicating with the two horizontal sections 162 and adapted to discharge air upward, that is, the third air outlet 122 of the heat dissipation air duct is formed on the second side wall 12. A second centrifugal fan (not shown in the figure) is arranged in the horizontal section 162 and adapted to guide the air flow of the vertical section 161 along the X-axis direction to the third air outlet 122.

[0053] A waterproof structure 60 can be installed at the third air outlet 122. Referring to Figures 7-8 The waterproof structure 60 includes a frame body 61 provided on the second side wall 12 and a plurality of blades 62, the frame body 61 is fixedly connected with the second side wall 12, the blades 62 are arranged in the frame body 61 in a vertical direction and each extends along the Y-axis direction, each blade 62 includes a first guide plate 63 inclined outward from top to bottom and a second guide plate 64 provided on the upper surface of the first guide plate 63 and inclined inward from top to bottom.

[0054] Still referring to Figures 3-4 The protection cavity 01 and the first ventilation cavity 02 are separated by the supporting plate 18, the supporting plate 18 is provided with a hot air return air outlet 181 and a cold air air outlet 182 along the X-axis direction, wherein the hot air return air outlet 181 is close to the second side wall 12.

[0055] In the embodiment, the protection cavity 01 close to the first side wall 11 is provided with a partition plate 19 extending in a vertical direction, the partition plate 19 separates the protection cavity 01 into a through air cavity 05 close to the first side wall 11 and only used for air passing and a containing cavity 04 close to the second side wall 12, the through air cavity 05 is only used for air passing, which means that the through air cavity 05 is not used for placing protection assemblies; the through air cavity 05 and the containing cavity 04 are respectively communicated with the cold air air outlet 182 and the hot air return air outlet 181, Figures 3-4 In the embodiment, the cold air air outlet 182 and the hot air return air outlet 181 are both above the containing cavity 04. Referring to Figure 9 The partition plate 19 is provided with a plurality of through air outlets 191 arranged in a vertical direction and at least part of the through air outlets 191 are located at the bottom of the partition plate 19; wherein the vertical section 161 of the cover body 16 and the projection of the through air outlet 191 located at the bottom along the X-axis direction are staggered along the Y-axis direction. Figure 9In the specific embodiment, the bottom air passing openings 191 are two, which respectively correspond to the gap between the vertical section 161 of the cover body 16 and the first abutting wall 13 and the gap between the second abutting wall 14.

[0056] The air-cooled heat exchanger 20 is arranged in the first air duct 02 and supported on the support plate 18, and is in communication with the hot air return air outlet 181 and the cold air outlet 182 to cool the hot air of the hot air return air outlet 181 into the cold air of the cold air outlet 182. In actual application, the outer circulation air duct of the air-cooled heat exchanger 20 is in communication with the first air inlet 111 and the first air outlet 121, and the inner circulation air duct of the air-cooled heat exchanger 20 is in communication with the hot air return air outlet 181 and the cold air outlet 182. The outer circulation air duct and the inner circulation air duct are in heat exchange with each other to cool the hot air of the hot air return air outlet 181 into the cold air of the cold air outlet 182.

[0057] The heat exchange device 30 includes a liquid cooling unit 31 arranged in the second air duct 03 and a heat sink 32 arranged in the protection cavity 01 and in communication with the cooling flow channel of the liquid cooling unit 31. The heat sink 32 is a liquid cooling plate in this embodiment, and the cooling flow channel of the liquid cooling unit 31 exchanges heat with the circulating air flow of the second air inlet 112 to the second air outlet 15 to achieve cooling. The liquid cooling unit 31 belongs to the prior art, and this embodiment will not be described again.

[0058] Referring to Figures 3-4 and Figures 10-11 , the air guide member 40 extends along the X-axis direction and is arranged in the protection cavity 01. The upper end of the air guide member 40 is in communication with the cold air outlet 182, and the end close to the hot air return air outlet 181 is provided with a first air outlet 41 that discharges air downward to supply cold air to the containing cavity 04. The end away from the hot air return air outlet 181 is provided with a second air outlet 42 that discharges air to the air passing cavity 05. The air guide member 40 is provided with a first centrifugal fan (not shown in the figure), which is adapted to drive the air flow of the hot air return air outlet 181 to the cold air outlet 182, and the air volume of the second air outlet 42 is greater than that of the first air outlet 41. Figures 10-11 In the specific embodiment, the first air outlet 41 and the second air outlet 42 are both two, the two first air outlets 41 are arranged in the X-axis direction and extend along the Y-axis direction, and the two second air outlets 42 are arranged in the Y-axis direction and adapted to discharge air along the X-axis direction. Of course, in other embodiments, the second air outlet 42 can also be inclined to discharge air downward. Figures 3-4 In the specific embodiment, the second air outlet 42 and the hot air return air outlet 181 are away from each other along the X-axis direction, and the bottom air passing openings 191 are respectively located at the two most distant corners of the containing cavity 04.

[0059] The protection assembly 50 is arranged in the containing cavity 04 in the protection cavity 01, which includes the electric reactor 55 arranged in the heat dissipation air duct and the electrical assembly arranged outside the heat dissipation air duct and in the containing cavity 04, the electric reactor 55 is arranged in the vertical section 161 of the cover body 16, and the electrical assembly is at least partially cooled by the heat sink 32 and at least partially cooled by the cold air delivered by the air-cooled heat exchanger 20. In the embodiment, the air-cooled heat dissipation of the electrical assembly is at least partially cooled by the circulating air flow from the air inlet 191 to the hot air return air outlet 181, and at least partially cooled by the circulating air flow from the first air outlet 41 to the hot air return air outlet 181.

[0060] In the embodiment, the projection of the protection cavity 01 in the vertical direction covers the first ventilation cavity 02 and the second ventilation cavity 03, so that the overall electrical cabinet occupies a small space in the X-axis direction, which is beneficial to reducing the floor area required by multiple electrical cabinets when they are combined; when multiple electrical cabinets are used side by side along the X-axis direction or the Y-axis direction, the floor area required by multiple electrical cabinets used side by side can be reduced as a whole. In addition, since the first ventilation cavity 02 and the second ventilation cavity 03 are located above the protection cavity 01, the air inlet of the first ventilation cavity 02 and the air inlet of the second ventilation cavity 03 are necessarily far away from the ground, so that the inlet air temperature of the air-cooled heat exchanger 20 is relatively low, thereby ensuring that the air flow of the cold air outlet 182 always has a relatively low temperature, and also making the heat dissipation efficiency of the liquid cooling unit 31 high.

[0061] In the embodiment, the cabinet body 10 forms an air inlet surface and an air outlet surface on both sides along the X-axis direction. In actual application, the first air inlet 111 and the first air outlet 121 of the first ventilation cavity 02 are in communication with the outer circulating air duct of the air-cooled heat exchanger 20, and the second air inlet 112 and the second air outlet 15 of the second ventilation cavity 03 are in communication with the outer circulating air duct of the liquid cooling unit 31. Therefore, the above arrangement avoids the short circuit of hot air flow caused by the backflow of hot air from the first air outlet 121 to the first air inlet 111, and also avoids the inflow of hot air from the second air outlet 15 to the second air inlet 112 or the air inlet of the downstream electrical cabinet, thereby improving the heat dissipation efficiency of the protection assembly 50. Since the air inlet surface and the air outlet surface are respectively located on both sides of the cabinet body 10 along the X-axis direction, the above arrangement also creates conditions for the electrical cabinet to be combined along the Y-axis direction.

[0062] In the embodiment, the first air outlet 121, the second air outlet 15 and the third air outlet 122 are adapted to blow air upward, so that the electrical cabinet forms a structure for blowing air upward. Since hot air has a lower density, the hot air discharged from the first air outlet 121, the second air outlet 15 and the third air outlet 122 is not easy to flow downward into the downstream electrical cabinet, so that when multiple electrical cabinets are used side by side along the X-axis direction, the hot air of the air outlet of the upstream electrical cabinet does not affect the air inlet of the downstream electrical cabinet. In addition, the water inlet surface of the protection cavity 01 is reduced. In the embodiment, the water inlet surface is mainly formed on the upper cavity wall of the protection cavity 01. Compared with the technical solution in which the liquid cooling unit 31 is located above the protection cavity 01 and the air-cooled heat exchanger 20 is located on the side of the protection cavity 01, the part of the protection cavity 01 connected with the outer circulation heat dissipation is reduced. As known by those skilled in the art, the part of the outer circulation needs to be waterproofed, so that the above-mentioned setting reduces the water inlet surface of the protection cavity 01, improves the protection of the protection cavity 01 and reduces the protection cost.

[0063] In addition, the above-mentioned setting also makes the electrical components in the protection cavity 01 mainly dissipate heat through liquid cooling and air cooling. The liquid cooling has high heat dissipation efficiency. Since the air-cooled heat exchanger 20 and the liquid cooling unit 31 both dissipate heat through outer circulation, the protection of the protection cavity 01 can be improved. The liquid cooling and air cooling cooperatively maximize the heat dissipation efficiency of the protection components 50 in the protection cavity 01, and the protection of the protection cavity 01 is good. The electric reactor 55 is located in a separate heat dissipation air duct, and has high heat dissipation efficiency.

[0064] The cover 16 is located in the protection cavity 01, so that the protection components 50 are basically located in the protection cavity 01 and have high protection. Since the cover 16 is located in the protection cavity 01, the waterproof requirement of the cover 16 is high. In the embodiment, a waterproof structure 60 is arranged at the third air outlet 122. The first guide plate 63 and the second guide plate 64 are arranged on the blade 62. The first guide plate 63 is inclined outward from top to bottom. When rain hits the first guide plate 63, the water flow will flow downward along the first guide plate 63, thereby achieving the purpose of waterproofing. Meanwhile, the second guide plate 64 is inclined inward from top to bottom, so that when the air flow is sent out from the louver, the air flow is blown obliquely upward, thereby avoiding the accumulation of hot air at the lower side of the electrical cabinet. Meanwhile, the second guide plate 64 can also prevent rain from splashing upward from the ground and entering the louver, thereby avoiding water entering the heat dissipation air duct and improving the protection of the protection cavity 01.

[0065] In the embodiment, since the air passing cavity 05 is only used for air passing, in actual operation, the length of the air passing cavity 05 along the X-axis direction can be reduced as much as possible, and the length of the containing cavity 04 along the X-axis direction can be increased, and such arrangement is conducive to increasing the air pressure and flow rate of the air flow in the air passing cavity 05, facilitating the air outlet of the air passing opening 191 and the rapid flow of the air flow in the containing cavity 04, thereby creating conditions for improving the heat dissipation efficiency of the protection assembly 50, and making the containing cavity 04 have a larger space; wherein, the arrangement of the air passing cavity 05 and the air passing opening 191 makes the cold air of the cold air outlet 182 flow into the relatively low-pressure containing cavity 04 through the air passing opening 191 after flowing into the air passing cavity 05, and in actual application, the air passing opening 191 can be opened on the partition plate 19 for the place in the containing cavity 04 that is not easy to pass air, thereby avoiding the formation of a blind area of the air flow in the containing cavity 04, and in the embodiment, at least part of the air passing opening 191 is located at the bottom of the partition plate 19, since the hot air return air opening 181 is close to the second side wall 12, the cold air flowing out of the air passing opening 191 can flow through the bottom of the containing cavity 04 and then flow upward, thereby avoiding the formation of a blind area of the air flow at the bottom of the containing cavity 04, and avoiding the formation of a blind area of the air flow on one side of the second side wall 12, since the air passing openings 191 on the partition plate 19 are arranged in the vertical direction, multiple layers of cold air flow can be formed in the vertical direction, and the multiple layers of cold air flow can synchronously carry away the heat of the protection assembly 50 in the process of flowing toward the hot air return air opening 181, thereby improving the heat dissipation efficiency of the protection assembly 50, and making it unnecessary to make the turbulence fan to be distributed with air flow everywhere in the containing cavity 04, thereby facilitating later maintenance.

[0066] In the embodiment, the air-cooled heat exchanger 20 has a specific specification, and the distance between the cold air outlet 182 and the hot air return outlet 181 corresponding to the internal circulation air duct cannot be too far. The air guide member 40 is arranged to shorten the distance between the cold air outlet 182 and the hot air return outlet 181, thereby facilitating the arrangement of the air-cooled heat exchanger 20. The hot air return outlet 181 and the cold air outlet 182 are both located above the accommodation cavity 04. The air flow of the cold air outlet 182 is guided by the air guide member 40 to the air passing cavity 05 in a direction away from the hot air return outlet 181, so that the length of the air passing cavity 05 in the X-axis direction can be reduced as much as possible, thereby accelerating and pressurizing the air flow flowing into the air passing cavity 05 from the second air outlet 42, and then accelerating the air flow flowing out through the air passing opening 191, so that the heat of the protection assembly 50 can be quickly taken away. The protection assembly 50 is also adapted to dissipate heat by the circulation air flow from the first air outlet 41 to the hot air return outlet 181, so that multiple clusters of cold air flow in different directions can be formed in the accommodation cavity 04, further avoiding the air flow blind area and improving the heat dissipation efficiency. In actual application, the part of the protection assembly 50 with relatively low heat generation can be placed at the first air outlet 41 to ensure balanced heat dissipation of the protection assembly 50. The air guide member 40 is provided with a first centrifugal fan. Compared with an axial flow fan, the centrifugal fan has a smaller footprint and can realize air flow reversing. The air volume of the second air outlet 42 is greater than that of the first air outlet 41, which ensures that most of the cold air flows into the air passing cavity 05 and ensures balanced heat dissipation of the protection assembly 50.

[0067] In the embodiment, the cover body 16 includes a vertical section 161 and two horizontal sections 162. The two horizontal sections 162 are respectively located at both ends of the vertical section 161 in the Y-axis direction. The outer wall of the horizontal section 162 can guide the air flow of the air passing opening 191 to the second side wall 12, further avoiding the air flow blind area in the accommodation cavity 04. The inner wall of the two horizontal sections 162 is more conducive to the air pressure balance in the vertical section 161, thereby being more conducive to air outlet heat dissipation. In addition, the structure of the cover body 16 makes the air flow in the vertical section 161 more easily enter the second centrifugal fan, and the air outlet is smoother. The reactor 55 is arranged in the vertical section 161 of the cover body 16, which is conducive to the installation of the heavy reactor 55. The second centrifugal fan is arranged in the horizontal section 162, which is conducive to realizing air flow reversing and reducing the footprint compared with an axial flow fan. The projection of the vertical section 161 and the air passing opening 191 located at the bottom along the X-axis direction is staggered along the Y-axis direction, thereby avoiding the cover body 16 blocking the air flow of the air passing opening 191.

[0068] In specific implementation, the electrical assembly includes a first electrical component 51, a second electrical component 52, a third electrical component 53, a fourth electrical component 54, a fifth electrical component 56, and a sixth electrical component 57.

[0069] Specifically, the first electrical component 51 is a direct current electrical component close to the partition 19, the second electrical component 52 is a capacitor module, the first electrical component 51 and the second electrical component 52 are arranged along the X-axis direction and close to the first air outlet 41, the capacitor module includes an electrical plate 521 in a plate structure and adapted to carry a plurality of electrical units, the electrical plate 521 extends along the vertical direction and forms an air passage with the first electrical component 51.

[0070] The third electrical component 53 is a fuse, the third electrical component 53 is close to the partition 19 and located below the first electrical component 51, and the air passage 191 is at least partially located between the first electrical component 51 and the third electrical component 53.

[0071] The fourth electrical component 54 is an alternating current electrical component, which is close to the second side wall 12 and is disposed at the bottom of the accommodating cavity 04, Figures 3-4 In particular, the fourth electrical component 54 is spaced apart from the bottom of the accommodating cavity 04, the third electrical component 53 is located downstream of the air flow guided by one of the air guiding faces 1612, and the fourth electrical component 54 is located downstream of the air flow guided by the other air guiding face 1612.

[0072] The fifth electrical component 56 is an IGBT power module, which is close to the hot air return air outlet 181 and is cooled by the heat sink 32, the second electrical component 52 is higher than the cover 16 and forms an air guiding passage extending along the X-axis direction between the air guiding face 1611 and the fifth electrical component 56 to guide the air flow to the fifth electrical component 56.

[0073] The sixth electrical component 57 is an auxiliary transformer, which is close to the air passage 191 at the bottom of the accommodating cavity 04 and is disposed at the bottom of the accommodating cavity 04, and has a relatively low heat dissipation, and is used to supply power to electrical components such as the first centrifugal fan, the second centrifugal fan, the controller, etc.

[0074] In particular, the electrical connection relationship of the protection assembly 50 is that the direct current electrical component is connected with the capacitor module, the capacitor module is connected with the IGBT power module, and the IGBT power module is connected with the alternating current electrical component through the reactor.

[0075] Referring to Figures 4-5The air flow direction of the protection cavity 01 is that the air flow from the cold air outlet 182 flows out through the first air outlet 41 and the second air outlet 42, the cold air flowing out through the first air outlet 41 passes through the air passage and takes away the heat of the first electrical component 51 and the second electrical component 52, then is guided by the air guide surface 1612 to flow obliquely downward to take away the heat of the third electrical component 53 and the fourth electrical component 54, then flows to the second side wall 12 under the guidance of the horizontal section 162 of the cover body 16, then flows upward and flows into the hot air return air outlet 181 after passing through the fifth electrical component 56, and part of the cold air flows to the fifth electrical component 56 through the air guide passage to take away the heat of the fifth electrical component 56, then flows upward into the hot air return air outlet 181; the cold air flowing out through the second air outlet 42 flows into the air passage 05, the flow rate is accelerated in the air passage 05 and a larger air pressure is formed, then flows out through the air passage 191, part of the cold air passes through the third electrical component 53 to take away the heat of the third electrical component 53, part of the cold air flows out from the bottom air passage 191, passes through the sixth electrical component 57 to take away the heat of the sixth electrical component 57, then flows to the fourth electrical component 54 through the gap between the vertical section 161 of the cover body 16 and the first abutting wall 13 and the second abutting wall 14 to take away the heat of the fourth electrical component 54, then flows upward through the fifth electrical component 56 to take away the heat of the fifth electrical component 56 and then flows into the hot air return air outlet 181.

[0076] It can be known that the above arrangement fully utilizes the structure of the first electrical component 51 and the second electrical component 52 and the layout of the protection assembly 50 to form the air passage, which is beneficial to the downward flow of the air flow of the first air outlet 41 and can take away the heat of the first electrical component 51 and the second electrical component 52 synchronously in the process of downward flow. The structure of the cover body 16 (the air guide surface 1611 and the air guide surface 1612) and the layout of the electrical reactor 55 are combined to form the air passage in the accommodating cavity 04, which is combined with the arrangement of the air passage 191 and is beneficial to taking away the heat of the third electrical component 53 and the fourth electrical component 54. The two air guide surfaces 1612 are beneficial to the rotation of the air flow in the vertical section 161, thereby being beneficial to the air outlet. The fifth electrical component 56 is cooled by the heat sink 32, so that the temperature of the fifth electrical component 56 as a whole is not high. The fifth electrical component 56 is placed close to the hot air return air outlet 181 and the heat thereof is taken away through the air guide passage, thereby avoiding the local temperature of the fifth electrical component 56 from being too high. The sixth electrical component 57 generates a small amount of heat, and the sixth electrical component 57 is close to the bottom air passage 191. The temperature of the sixth electrical component 57 will not be too high after the cold air passes through the sixth electrical component 57, thereby ensuring the balanced heat dissipation of other electrical components. Therefore, the above arrangement also makes the wiring of the first to sixth electrical components convenient and makes each electrical component have a higher heat dissipation efficiency and balanced overall heat dissipation.

[0077] In the embodiment, the first end and the second end of the cabinet 10 along the X-axis direction are respectively provided with a first movable door and a second movable door, the first movable door and the second movable door are fixed to form a first side wall 11 and a second side wall 12 respectively, and the baffle 19 is close to the first end; the second side wall 12 is adapted to be sealingly connected with the two horizontal sections 162 of the cover body 16 to make the horizontal sections 162 communicate with the third air outlet 122.

[0078] The first movable door is fixed to form the first side wall 11, and the baffle 19 is close to the first end. In actual application, in order to ensure the protection and the electrical safety, a sealing plate is arranged when the first movable door is opened to avoid the direct exposure of the protection assembly 50, and in order to improve the protection, a sealing strip is usually arranged around the first movable door, and the sealing plate and the first movable door have a spacing when being fixed. Therefore, the above-mentioned arrangement fully utilizes the structure of the cabinet 10 itself to form the air passing cavity 05, that is, the baffle 19 can exist as the sealing plate of the protection assembly 50, and can also cooperate with the first movable door to form the air passing cavity 05, thereby maximizing the space of the electrical cabinet along the X-axis direction, the structure is ingenious, and the cost is low. The second movable door is fixed to form the second side wall 12, and the second side wall 12 is adapted to be sealingly connected with the two horizontal sections 162 of the cover body 16 to make the horizontal sections 162 communicate with the third air outlet 122, the air resistance is small, the air outlet is smooth, and the maintenance of the protection cavity 01 is facilitated.

[0079] The above description and embodiment of the description are used to explain the protection scope of the present application, but do not constitute the limitation of the protection scope of the present application. Through the inspiration of the present application or the above-mentioned embodiment, the modification, equivalent replacement or other improvement of the embodiment of the present application or one part of the technical features can be obtained by the ordinary skilled in the art combining with the common knowledge, the ordinary technical knowledge and / or the prior art in the field, through the logical analysis, reasoning or limited test, and should be included in the protection scope of the present application.

Claims

1. An electrical cabinet, characterized in that, include The cabinet (10) has a relatively sealed protective cavity (01) and a first ventilation cavity (02) located above the protective cavity (01). The projections of the protective cavity (01) and the first ventilation cavity (02) in the vertical direction at least partially overlap. The protective cavity (01) and the first ventilation cavity (02) are separated by a support plate (18). The support plate (18) is provided with a hot air return air inlet (181) and a cold air outlet (182). The cabinet (10) has opposite and parallel sections arranged along the X-axis. The cabinet (10) has a first sidewall (11) and a second sidewall (12) extending vertically. The first sidewall (11) has a first air inlet (111) corresponding to the first ventilation cavity (02), and the second sidewall (12) has a first air outlet (121) corresponding to the first ventilation cavity (02). The cabinet (10) also has a second ventilation cavity (03) located above the protective cavity (01). The projections of the protective cavity (01) and the second ventilation cavity (03) in the vertical direction at least partially overlap. An air-cooled heat exchanger (20) is placed in the first ventilation chamber (02) and supported on the support plate (18). It is connected to the hot air return port (181) and the cold air outlet (182) to cool the hot air at the hot air return port (181) into the cold air at the cold air outlet (182). A protective assembly (50), disposed within the protective cavity (01), is adapted for heat dissipation from the circulating airflow from the cold air outlet (182) to the hot air return outlet (181); and A heat exchange device (30) comprising a liquid cooler (31) disposed in the second ventilation chamber (03) and a radiator (32) communicating with a cooling channel of the liquid cooler (31), the radiator (32) being disposed in the protective chamber (01) and adapted to dissipate heat for at least a portion of the protective components (50).

2. An electrical cabinet as described in claim 1, characterized in that, The second ventilation cavity (03) is located at the top of the cabinet (10) and above the first ventilation cavity (02); the projection of the protective cavity (01) along the vertical direction covers the first ventilation cavity (02) and the second ventilation cavity (03); the first side wall (11) is provided with a second air inlet (112) corresponding to the second ventilation cavity (03); the top of the second ventilation cavity (03) is provided with a second air outlet (15); the first air outlet (121) is adapted to discharge air upwards.

3. An electrical cabinet as described in claim 2, characterized in that, The protective cavity (01) is provided with a partition (19) extending vertically near the first side wall (11). The partition (19) divides the protective cavity (01) along the X-axis into an air passage cavity (05) near the first side wall (11) and a receiving cavity (04) near the second side wall (12). The air passage cavity (05) and the receiving cavity (04) are respectively connected to the cold air outlet (182) and the hot air return outlet (181). The hot air return outlet (181) is near the second side wall (12). The partition (19) is provided with a plurality of air passages (191) arranged vertically, and at least some of the air passages (191) are located at the bottom of the partition (19). The protective component (50) is adapted to dissipate heat from the circulating airflow from the air inlet (191) to the hot air return inlet (181).

4. An electrical cabinet as described in claim 3, characterized in that, It also includes an air guide (40); the hot air return port (181) and the cold air outlet (182) are both located above the accommodating cavity (04); The air guide (40) extends along the X-axis direction, and its upper end is connected to the cold air outlet (182). The end of the guide near the hot air return outlet (181) is provided with a first air outlet (41) that discharges downward to deliver cold air to the accommodating cavity (04). The end of the guide away from the hot air return outlet (181) is provided with a second air outlet (42) that discharges air to the air passage cavity (05). The air guide (40) is provided with a first centrifugal fan, which is adapted to drive the airflow of the hot air return port (181) to the cold air outlet (182) and make the airflow of the second exhaust port (42) greater than that of the first exhaust port (41). The protective component (50) is also adapted to dissipate heat from the circulating airflow from the first exhaust port (41) to the hot air return port (181).

5. An electrical cabinet as described in claim 4, characterized in that, It also includes a second centrifugal fan; the cabinet (10) is also provided with a cover (16), the cover (16) is placed at the bottom of the accommodating cavity (04) and forms an independent heat dissipation air duct, the cover (16) includes a vertical section (161) and two horizontal sections (162) extending along the X-axis direction, the two horizontal sections (162) are respectively located at the two ends of the top of the vertical section (161) in the Y-axis direction; the bottom of the cabinet (10) is provided with a third air inlet (17) communicating with the bottom end of the vertical section (161), and the second side wall (12) is provided with a third air outlet (122) communicating with the two horizontal sections (162) and suitable for upward air discharge; The protective assembly (50) includes a reactor (55) placed within the vertical section (161); The second centrifugal fan is placed in the horizontal section (162) and is adapted to direct the airflow of the vertical section (161) along the X-axis direction to the third air outlet (122); The projection of the vertical section (161) and the air vent (191) at the bottom along the X-axis direction are offset from each other along the Y-axis direction.

6. An electrical cabinet as described in claim 5, characterized in that, The protective component (50) is provided with a first electrical component (51) near the first exhaust port (41) and a second electrical component (52) spaced apart from the first electrical component (51) along the X-axis direction. The second electrical component (52) is a capacitor module. The capacitor module includes an electrical board (521) with a plate-like structure and suitable for carrying a number of electrical units. The electrical board (521) extends in the vertical direction and forms an air passage between it and the first electrical component (51). The top of the vertical section (161) of the cover (16) is provided with an air guide surface (1612) that is inclined relative to both the vertical direction and the X-axis direction, so that the airflow in the air passage is suitable for inclined downward flow.

7. An electrical cabinet as described in claim 6, characterized in that, The protective assembly (50) further includes a third electrical component (53), a fourth electrical component (54), a fifth electrical component (56), and a sixth electrical component (57); The third electrical component (53) is close to the partition (19) and located below the first electrical component (51), and the air vent (191) is at least partially located between the first electrical component (51) and the third electrical component (53); The fourth electrical component (54) is located near the second sidewall (12) at the bottom of the accommodating cavity (04); The cover (16) is provided with two air guide surfaces (1612) that gradually move away from each other from top to bottom along the X-axis direction. The third electrical component (53) is located downstream of the airflow guided by one of the air guide surfaces (1612), and the fourth electrical component (54) is located downstream of the airflow guided by the other air guide surface (1612). The fifth electrical component (56) is located near the hot air return vent (181), and the radiator (32) is used to dissipate heat for the fifth electrical component (56); The air vent (191) of the sixth electrical component (57) near the bottom is located at the bottom of the accommodating cavity (04); The first electrical component (51) is a DC electrical component; the third electrical component (53) is a fuse; the fourth electrical component (54) is an AC electrical component; the fifth electrical component (56) is a power module; and the sixth electrical component (57) is an auxiliary transformer.

8. An electrical cabinet as described in any one of claims 5-7, characterized in that, The cabinet (10) is provided with a first movable door and a second movable door at the first end and the second end along the X-axis direction, respectively. When the first movable door and the second movable door are fixed, they form the first side wall (11) and the second side wall (12), respectively. The partition (19) is close to the first end. The second side wall (12) is adapted to be sealed and connected with the two horizontal sections (162) of the cover (16) so that the horizontal sections (162) are connected to the third air outlet (122).

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