Power cabinet

Abstract

The invention discloses a power cabinet, which comprises a cabinet body, an air-cooled heat exchanger, a heat exchange device and a protection assembly, and is characterized in that the cabinet body is provided with a relatively closed protection cavity, and a first ventilation cavity and a second ventilation cavity located above the protection cavity; the cabinet body is also provided with a cover body which forms an independent heat radiation air channel. The first ventilation cavity, the second ventilation cavity and the heat dissipation air channel are provided with a first air outlet, a second air outlet and a third air outlet respectively, the air cooling heat exchanger is arranged in the first ventilation cavity and used for conveying cold air to the protection cavity and recycling hot air from the protection cavity. The heat exchange device comprises a liquid cooling unit and a radiator which are arranged in the second ventilation cavity; the protection assembly comprises an electric reactor arranged in the heat dissipation air channel and an electrical assembly located outside the heat dissipation air channel and located in the protection cavity, and the electrical assembly is at least partially cooled by the radiator and at least partially cooled by cold air conveyed by the air cooling heat exchanger. According to the invention, the occupied space in the X-axis direction or the Y-axis direction is small, the heat dissipation efficiency is high, and the protection performance is high.

Description

Technical Field

[0001] The present invention relates to the field of electrical technologies, and more particularly to a power cabinet. Background Art

[0002] Power cabinets such as photovoltaic inverters and energy storage converters usually include IGBT power modules and capacitor modules. The IGBT power modules and capacitor modules have high heat dissipation requirements and protection requirements. Among them, the IGBT generates a relatively large amount of heat. In the prior art, a relatively independent and sealed protection cavity is often provided to accommodate components that require high protection, such as IGBT power modules and capacitor modules, and a liquid cooling unit and an air-cooled heat exchanger are used to dissipate heat from the high-protection components. Among them, the liquid cooling unit is often placed on the top of the cabinet, and the air-cooled heat exchanger is placed inside the protection cavity and installed on the side wall of the cabinet or directly installed outside the side wall of the cabinet. When the air-cooled heat exchanger is installed inside the protection cavity, it will occupy the internal space of the protection cavity, making it necessary to increase the volume of the protection cavity. When the air-cooled heat exchanger is installed outside the side wall of the cabinet, it will make the overall power cabinet require more floor space. Therefore, in either case, the overall floor space of the cabinet will be large. When multiple power cabinets are used side by side, this disadvantage is even more prominent. In addition, since the air-cooled heat exchanger is installed on the side wall of the cabinet, the external circulation air duct of the air-cooled heat exchanger often extends in the vertical direction. Generally, the air inlet of the external circulation air duct is located below and the air outlet is located above. This makes the air inlet of the air-cooled heat exchanger often close to the ground. When the power cabinet is used outdoors, the ground temperature outdoors is relatively high, resulting in a relatively high temperature at the air inlet of the air-cooled heat exchanger, and thus poor overall heat dissipation efficiency in the protection cavity. In the prior art, devices such as fuses are often cooled by air cooling, but in the long-term use process, the air-cooled heat dissipation method cannot meet the protection requirements of these devices. And the air-cooled heat dissipation method is also prone to hot air short circuit. Summary of the Invention

[0003] The object of the present invention is to overcome the above-mentioned defects or problems existing in the background art, and provide a power cabinet with small occupied space in the X-axis direction or Y-axis direction, high heat dissipation efficiency and high protection performance.

[0004] To achieve the above object, the present invention and its related embodiments adopt the following technical solutions but are not limited to the following:

[0005] The first technical solution and its related embodiments relate to a power cabinet, which includes a cabinet body provided with a relatively enclosed protection cavity, a first ventilation cavity and a second ventilation cavity above the protection cavity. The projection of the protection cavity in the vertical direction at least partially overlaps with the projections of the first ventilation cavity and the second ventilation cavity in the vertical direction. The cabinet body is further provided with a cover body, and at least part of the cover body is located inside the protection cavity or below the protection cavity to form an independent heat dissipation air duct. The first ventilation cavity, the second ventilation cavity and the heat dissipation air duct are respectively provided with a first air outlet, a second air outlet and a third air outlet on the outer wall of the cabinet body, and the first air outlet, the second air outlet and the third air outlet are all adapted to blow air upward. An air-cooled heat exchanger is placed in the first ventilation cavity and is used to transport cold air to the protection cavity and recover hot air from the protection cavity. A heat exchange device includes a liquid-cooled unit placed in the second ventilation cavity and a radiator placed in the protection cavity and communicated with the cooling flow path of the liquid-cooled unit. And a protection component includes a reactor placed in the heat dissipation air duct and an electrical component located outside the heat dissipation air duct and inside the protection cavity. At least part of the electrical component is cooled by the radiator and at least part is cooled by the cold air transported by the air-cooled heat exchanger.

[0006] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution. Among them, the second ventilation cavity, the first ventilation cavity and the protection cavity are arranged in sequence from top to bottom, and the projection of the protection cavity in the vertical direction covers the first ventilation cavity and the second ventilation cavity. The cabinet body is provided with a first side wall and a second side wall that are parallel and opposite to each other along the X-axis direction. The first side wall is provided with a first air inlet corresponding to the first ventilation cavity and a second air inlet corresponding to the second ventilation cavity. The first air outlet and the third air outlet are both arranged on the second side wall. The second air outlet is arranged at the top of the second ventilation cavity. The cover body is located at the bottom of the protection cavity, and a waterproof structure is provided at the third air outlet. The waterproof structure includes a frame body arranged on the second side wall and a plurality of blades. Each blade is arranged in the frame body at intervals in the vertical direction and extends along the Y-axis direction. Each blade includes a first guide plate that is inclined outward from top to bottom and a second guide plate that is arranged on the upper surface of the first guide plate and is inclined inward from top to bottom.

[0007] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution. Among them, the first ventilation cavity and the protection cavity are separated by a support plate. The support plate is provided with a hot air return air inlet and a cold air outlet communicated with the air-cooled heat exchanger along the X-axis direction. The hot air return air inlet is close to the second side wall. 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 through-air cavity near the first side wall and only used for air passage and a containing cavity near the second side wall. The through-air cavity and the containing cavity are respectively communicated with the cold air outlet and the hot air return air inlet. The electrical component is adapted to be cooled by the circulating air flow from the air through-port to the hot air return air inlet.

[0008] The fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution. Further included is a wind guiding member. Both the hot air return air outlet and the cold air outlet correspond to the upper part of the accommodation cavity. The wind guiding member extends in the X-axis direction. Its upper end communicates with the cold air outlet. One end close to the hot air return air outlet is provided with a first air outlet for downward air supply to convey cold air to the accommodation cavity. One end far from the hot air return air outlet is provided with a second air outlet for air supply to the air passing cavity. A first centrifugal fan is provided inside the wind guiding member. The first centrifugal fan is adapted to drive the air flow at the hot air return air outlet to flow towards the cold air outlet, and make the air volume at the second air outlet greater than that at the first air outlet. The protection assembly is also adapted to dissipate heat through the circulating air flow from the first air outlet to the hot air return air outlet.

[0009] The fifth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution. Further included is a second centrifugal fan. The cover body includes a vertical section and two horizontal sections extending in the X-axis direction. The two horizontal sections are respectively located at both ends in the Y-axis direction at the top of the vertical section. The horizontal section communicates with the third air outlet. A third air inlet communicating with the bottom end of the vertical section is provided at the bottom of the cabinet body. The reactor is placed in the vertical section. The second centrifugal fan is placed in the horizontal section and is adapted to export the air flow in the vertical section along the X-axis direction to the third air outlet. The projections of the vertical section and the air passing opening at the bottom along the X-axis direction are offset from each other along the Y-axis direction.

[0010] The sixth technical solution is based on the fifth technical solution and is a preferred embodiment of the fifth technical solution. A first electrical component and a second electrical component are arranged at intervals along the X-axis direction near the first air outlet of the protection assembly. An air passing channel corresponding to the first air outlet is formed between the first electrical component and the second electrical component. The vertical section of the cover body is provided with a wind guiding surface inclined with respect to both the vertical direction and the X-axis direction corresponding to the air passing channel so that the air flow in the air passing channel is adapted to flow obliquely downward.

[0011] The seventh technical solution is based on the sixth technical solution and is a preferred embodiment of the sixth technical solution. The first electrical component is close to the partition board. The protection assembly further includes a third electrical component. The third electrical component is close to the partition board and is located below the first electrical component. At least part of the air passing opening is located between the first electrical component and the third electrical component.

[0012] The eighth technical solution is based on the seventh technical solution and is a preferred embodiment of the seventh technical solution. Among them, the protection component further includes a fourth electrical component, the fourth electrical component is placed near the second side wall at the bottom of the accommodation cavity, the cover body is provided with two air guiding surfaces that gradually move away from top to bottom along the X-axis direction, the third electrical component is located downstream of the air flow guided by one of the air guiding surfaces, and the fourth electrical component is located downstream of the air flow guided by the other air guiding surface.

[0013] The ninth technical solution is based on the eighth technical solution and is a preferred embodiment of the eighth technical solution. Among them, the second electrical component is a capacitor module, the capacitor module includes an electrical board member in a plate-like structure and adapted to carry a number of electrical units, the electrical board member extends in the vertical direction and forms the air duct with the first electrical component; the first electrical component is a DC electrical component; the third electrical component is a fuse; the fourth electrical component is an AC electrical component.

[0014] The tenth technical solution is based on the ninth technical solution and is a preferred embodiment of the ninth technical solution. Among them, the protection component includes a fifth electrical component and a sixth electrical component, the radiator is adapted to dissipate heat for the fifth electrical component, and the fifth electrical component is close to the hot air return port; the sixth electrical component is placed near the air inlet at the bottom at the bottom of the accommodation cavity; a wind guiding surface parallel to the X-axis and the Y-axis is further provided at the top of the vertical section, and the two air guiding surfaces are respectively located at both ends of the wind guiding surface along the X-axis direction; the second electrical component is higher than the cover body and forms an air guiding duct extending along the X-axis direction with the wind guiding surface to guide the air flow to the fifth electrical component.

[0015] From the above description of the present invention and its specific embodiments, it can be seen that compared with the prior art, the technical solutions and related embodiments of the present invention have the following beneficial effects due to the following technical means:

[0016] In the first technical solution and related embodiments, the first ventilation cavity and the second ventilation cavity are located above the protection cavity. The air-cooled heat exchanger is placed in the first ventilation cavity. The projections of the protection cavity and the first ventilation cavity in the vertical direction overlap at least partially. Therefore, the air-cooled heat exchanger does not occupy the internal space of the protection cavity, nor does it occupy the side space of the cabinet body. Instead, it makes full use of the height space of the cabinet body. Similarly, the setting of the second ventilation cavity also makes full use of the height space of the cabinet body. Therefore, the above setting reduces the occupied space of the cabinet body in the X-axis direction or the Y-axis direction. When the projections of the protection cavity, the first ventilation cavity, and the second ventilation cavity in the vertical direction completely overlap, the overall floor area of the power cabinet is the smallest and the projected area on the ground in the vertical direction is the smallest. That is, the space occupied by the power cabinet in the X-axis direction or the Y-axis direction is greatly reduced. When multiple power cabinets are used side by side in the X-axis direction or the Y-axis direction, the overall floor area required for multiple power cabinets used side by side can be reduced. In addition, since the first ventilation cavity and the second ventilation cavity are located above the protection cavity, the air inlets of the first ventilation cavity and the second ventilation cavity are necessarily far from the ground. As a result, the inlet air temperature of the air-cooled heat exchanger is relatively low, ensuring that the air flow at the cold air outlet always has a relatively low temperature and enabling the liquid cooling unit to have a high heat dissipation efficiency. Since there is no concern about water inlet for the liquid cooling unit, the air outlet of the second ventilation cavity does not necessarily need to be opened on the side of the cabinet body but can be opened on the top of the cabinet body. Thus, when multiple power cabinets are used side by side, it is not easy to cause heat flow disturbance to the downstream power cabinets. And even if the heat flow flows out from the side of the top of the cabinet body, due to the low density of hot air, it is not easy to affect the downstream power cabinets.

[0017] Since the first air outlet, the second air outlet, and the third air outlet are suitable for upward air outlet, the power cabinet forms a structure with upward air outlet. Since the density of hot air is relatively low, the hot air discharged from the first air outlet, the second air outlet, and the third air outlet is not easy to flow downward and enter the downstream power cabinets. When multiple power cabinets are used side by side in the X-axis direction or the Y-axis direction, the hot air from the air outlets of the upstream power cabinets will not affect the air inlets of the downstream power cabinets. In addition, it reduces the possible water inlet surface of the protection cavity. In this technical solution, the water inlet surface is mainly formed on the upper cavity wall of the protection cavity. Compared with the technical solution where 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 to the external circulation heat dissipation is reduced. As is well known to those skilled in the art, waterproof protection needs to be done for the parts of the external circulation. Therefore, the above setting reduces the possible water inlet surface of the protection cavity, improves the protection performance of the protection cavity, and reduces the protection cost.

[0018] In addition, the above settings also enable the protection components in the protection cavity to dissipate heat mainly through liquid cooling and air cooling. The liquid cooling method has high heat dissipation efficiency. Since both the air-cooled heat exchanger and the liquid cooling unit dissipate heat through the external circulation, the protection performance of the protection cavity can be improved well. The combined heat dissipation method of liquid cooling and air cooling can maximize the heat dissipation efficiency of the protection components in the protection cavity, and the protection performance of the protection cavity is good. In practical applications, except for the reactor, all parts of the protection components can be placed in the protection cavity, thereby improving the protection performance of the protection components. The reactor is located in an independent heat dissipation air duct, and the heat dissipation efficiency is high.

[0019] In Technical Solution 2 and its 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 occupied space of the power cabinet in the X-axis direction is small, which is beneficial to reducing the floor area required for multiple power cabinets during subsequent cabinet combination; among them, the first side wall is provided with a first air inlet corresponding to the first ventilation cavity and a second air inlet corresponding to the second ventilation cavity. The first air outlet and the third air outlet are both arranged on the second side wall, and the second ventilation opening is arranged on the top of the power cabinet, that is, the two sides of the cabinet body in the X-axis direction form an air inlet surface and an air outlet surface respectively. In practical applications, the first air inlet and the first air outlet of the first ventilation cavity are communicated with the external circulation air duct of the air flow heat exchanger, and the second air inlet and the second air outlet of the second ventilation cavity are communicated with the external circulation air duct of the liquid cooling unit. Therefore, the above settings avoid the hot air reflux of the first air outlet to the first air inlet, resulting in a hot air flow short circuit, and also avoid the hot air flow of the second air outlet from entering the second air inlet or the air inlet of the downstream power cabinet, thereby improving the heat dissipation efficiency of the protection components; since the air inlet surface and the air outlet surface are respectively located on both sides of the cabinet body along the X-axis direction, the above settings also create conditions for the power cabinets to be combined along the Y-axis direction.

[0020] Among them, the cover body is located in the protection cavity, so the protection components are basically located in the protection cavity, and the protection performance is high; since the cover body is located in the protection cavity, the waterproof requirement of the cover body is relatively high. In this technical solution, a waterproof structure is provided at the third air outlet. The first guide plate and the second guide plate are arranged on the blades. The first guide plate inclines outward from top to bottom. When rain hits the first guide plate, the water flow will flow down along the first guide plate, thus achieving the purpose of waterproofing. At the same time, the second guide plate inclines inward from top to bottom, which can guide the air flow to blow out obliquely upward when it is sent out from the louvers, so as to avoid the accumulation of hot air at the lower side position of the power cabinet; at the same time, the second guide plate can also prevent rainwater from splashing upward from the ground from entering the inside of the louvers, thus avoiding water from entering the heat dissipation air duct and improving the protection performance of the protection cavity.

[0021] In technical solution three and its related embodiments, the air passage cavity is only used for air passage, which means that the air passage cavity is not used to place protective components. Therefore, in actual operation, the length of the air passage cavity along the X-axis direction can be minimized and the length of the accommodating cavity along the X-axis direction can be increased. Such a setting is conducive to increasing the wind pressure and flow rate of the wind flow in the air passage cavity, facilitating the air outlet and the rapid flow of the wind flow in the accommodating cavity, thereby creating conditions for improving the heat dissipation efficiency of the protective components and increasing the space of the accommodating cavity; wherein, the setting of the air passage cavity and the air outlet allows the cold air from the cold air outlet to flow into the relatively low-pressure accommodating cavity through the air outlet after flowing into the air passage cavity. In actual application, the places in the accommodating cavity that are not easy to pass air can be located in An air vent is provided on the partition to avoid the formation of a wind blind zone in the accommodating cavity. In the present technical solution, at least part of the air vent is located at the bottom of the partition. Since the hot air return vent is close to the second side wall, the cold air flowing out of the air vent can flow through the bottom of the accommodating cavity and then flow upward, thereby avoiding the formation of a wind blind zone at the bottom of the accommodating cavity and also avoiding the formation of a wind blind zone on one side of the second side wall. Since the air vent on the partition is arranged in the vertical direction, a multi-layer cold air flow can be formed in the vertical direction. The multi-layer cold air flow can simultaneously take away the heat of the protective component in the process of flowing to the hot air return vent, thereby improving the heat dissipation efficiency of the protective component, and making it possible to fill the accommodating cavity with wind without using a spoiler fan, which is convenient for later maintenance. In addition, in the present technical solution, the hot air return vent and the cold air outlet are arranged along the X-axis direction. Compared with the vertical arrangement in the prior art, the height space of the cabinet is fully utilized, thereby saving floor space.

[0022] In technical solution four and its related embodiments, since the air-cooled heat exchanger has specific specifications, the distance between the cold air outlet and the hot air return outlet corresponding to its internal circulation air duct cannot be too far. The setting of the air guide makes the distance between the cold air outlet and the hot air return outlet shorter, which is convenient for setting up the air-cooled heat exchanger. The hot air return port and the cold air outlet both correspond to the top of the accommodating cavity, and the airflow from the cold air outlet is guided into the air passage cavity in a direction away from the hot air return port through the air guide, so that the length of the air passage cavity along the X-axis direction can be reduced as much as possible, so that the airflow can be accelerated and pressurized in the air passage cavity when flowing into the air passage cavity from the second air outlet, and then accelerated again when flowing out through the air outlet, thereby quickly taking away the heat of the protective component; wherein, the protective component is also suitable for heat dissipation by the circulating airflow from the first air outlet to the hot air return port, so that multiple clusters of cold air flows in different directions can be formed in the accommodating cavity, further avoiding airflow blind spots and improving heat dissipation efficiency. In actual applications, the part of the protective component with relatively low heat generation can be placed at the first air outlet to ensure balanced heat dissipation of the protective component. A first centrifugal fan is provided in the air guide. Compared with an axial flow fan, a centrifugal fan occupies a smaller area and can realize airflow reversal. The air volume of the second exhaust port is greater than that of the first exhaust port, ensuring that most of the cold air flows into the wind cavity and ensuring balanced heat dissipation of the protective component.

[0023] In technical solution five and its related embodiments, the cover body includes a vertical section and two horizontal sections. The two horizontal sections are respectively located at the two ends of the top of the vertical section in the Y-axis direction. The outer wall of the horizontal section can guide the wind flow from the air outlet to the second side wall, further avoiding the air flow blind area in the accommodating cavity. The inner walls of the two horizontal sections are more conducive to the wind pressure balance in the vertical section, which is more conducive to air outlet and heat dissipation. In addition, the structure of the cover body makes it easier for the air flow in the vertical section to enter the second centrifugal fan, and the air outlet is smoother. The reactor is placed in the vertical section of the cover body, which is conducive to the installation of the heavier reactor. The second centrifugal fan is placed in the horizontal section, which is conducive to the reversal of the wind flow and reduces the floor space compared to the axial flow fan; the projection of the vertical section and the air outlet at the bottom along the X-axis direction is staggered along the Y-axis direction, avoiding the cover body blocking the wind flow from the air outlet.

[0024] In technical solution six and related embodiments, an air duct corresponding to the first air outlet is formed between the first electrical component and the second electrical component, which makes full use of the structure of the first electrical component and the second electrical component themselves and the layout of the protective component, which is conducive to the downward flow of the wind from the first air outlet, and can simultaneously take away the heat of the first electrical component and the second electrical component during the downward flow. Among them, the cover body is also provided with an air guide surface to make the wind from the first air outlet suitable for downward flow, and this part of the cold air can further flow to the wind blind area or the area with small air volume, thereby improving the overall heat dissipation efficiency of the protective component. Therefore, the above-mentioned setting makes full use of the structure of the cover body and the layout of the reactor to form an air duct in the accommodating cavity, and the structure is ingenious.

[0025] In technical solution seven and related embodiments, the air outlet is at least partially located between the first electrical component and the third electrical component. In this way, 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 outlet, and the heat dissipation efficiency is high.

[0026] In technical solution eight and related embodiments, the wind guide surface of the cover body can guide the wind flow from the first exhaust port to the third electrical component and the fourth electrical component respectively, thereby improving the heat dissipation efficiency of the third electrical component and the fourth electrical component, and the two wind guide surfaces are conducive to the rotation of the wind flow in the vertical section of the cover body, thereby facilitating the air outlet of the horizontal section.

[0027] In technical solution nine and related embodiments, the second electrical component is a capacitor module, and an air duct is formed between the electrical board of the capacitor module and the first electrical component, which fully utilizes the structure of the capacitor module itself to form the air duct; the first electrical component is a DC electrical component; the third electrical component is a fuse; and the fourth electrical component is an AC electrical component, which not only facilitates the wiring of the electrical components of the protective assembly, but also enables each electrical component to have a higher heat dissipation efficiency.

[0028] In Technical Solution Ten and related embodiments, the cold air discharged from the first air outlet flows downward to the third electrical component and the fourth electrical component through the air duct and is guided by the air guiding surface. Part of the cold air also flows to the fifth electrical component through the air guiding duct, avoiding the high local temperature caused by the fifth electrical component being close to the hot air return outlet. The air inlet near the bottom of the sixth electrical component is placed at the bottom of the accommodating cavity. Therefore, the air inlet at the bottom can quickly take away the heat of the sixth electrical component and then dissipate heat to other electrical components. In practical applications, the heat generation of the sixth electrical component is relatively low, thus ensuring the balanced heat dissipation of each electrical component. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Schematic diagram of the power cabinet according to the embodiment of the present invention Figure 1 ;

[0031] Figure 2 Schematic diagram of the power cabinet according to the embodiment of the present invention Figure 2 ;

[0032] Figure 3 Internal schematic diagram of the power cabinet according to the embodiment of the present invention Figure 1 ;

[0033] Figure 4 Internal schematic diagram of the power cabinet according to the embodiment of the present invention Figure 2 , where the cover hides a horizontal section;

[0034] Figure 5 For Figure 4 schematic diagram of the air flow direction;

[0035] Figure 6 Schematic diagram of the cover according to the embodiment of the present invention;

[0036] Figure 7 Schematic diagram of the second side wall according to the embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the waterproof structure according to the embodiment of the present invention;

[0038] Figure 9 Schematic diagram of hiding part of the first side wall according to the embodiment of the present invention;

[0039] Figure 10 Schematic diagram of the air guiding member according to the embodiment of the present invention Figure 1 ;

[0040] Figure 11 Schematic diagram of the air guiding member according to an embodiment of the present invention Figure 2 .

[0041] Description of main reference numerals:

[0042] 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 body 16; Vertical section 161; Air guiding surface 1611; Air deflecting surface 1612; Horizontal section 162; Third air inlet 17; Support plate 18; Hot air return air outlet 181; Cold air outlet 182; Partition plate 19; Air passage opening 191; Protection cavity 01; First ventilation cavity 02; Second ventilation cavity 03; Accommodation cavity 04; Air passage cavity 05; Air-cooled heat exchanger 20; Heat exchange device 30; Liquid cooling unit 31; Radiator 32; Air guiding member 40; First exhaust air outlet 41; Second exhaust air outlet 42; Protection assembly 50; First electrical component 51; Second electrical component 52; Electrical board component 521; Third electrical component 53; Fourth electrical component 54; Reactor 55; Fifth electrical component 56; Sixth electrical component 57; Waterproof structure 60; Frame body 61; Blade 62; First guiding plate 63; Second guiding plate 64. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0044] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects and not for describing a specific order.

[0045] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship are based on the orientation and position relationship shown in the drawings, and are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0046] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as a whole, and being fixedly connected through other devices or elements.

[0047] In the claims, the description and the above-mentioned drawings of the present invention, when using the terms "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0048] In the claims and the description except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the features with one of the above directions are perpendicular to the features with another direction, and it is not required that they 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 also perpendicular to 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.

[0049] See Figures 1 - 11 , Figures 1 - 11 shows a power cabinet, including a cabinet body 10, an air-cooled heat exchanger 20, a heat exchange device 30, a wind guiding member 40, a protection assembly 50 and a second centrifugal fan (not shown in the figure).

[0050] See Figures 1 - 2 , the cabinet body 10 is in a cuboid shape, the cabinet body 10 is provided with a first side wall 11 and a second side wall 12 that are opposite to each other and extend 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 that are opposite to each other and extend in the vertical direction along the Y-axis direction.

[0051] See Figures 3 - 4 , the cabinet body 10 is provided with a relatively airtight protection cavity 01 and a first ventilation cavity 02 and a second ventilation cavity 03 located above the protection cavity 01. The vertical projection of the protection cavity 01 overlaps at least partially with the vertical projections of the first ventilation cavity 02 and the second ventilation cavity 03; in this embodiment, the second ventilation cavity 03, the first ventilation cavity 02 and the protection cavity 01 are arranged in sequence from top to bottom, and the vertical projection of the protection cavity 01 covers the first ventilation cavity 02 and the second ventilation cavity 03. Figures 3 - 4 In, the lengths of the protection cavity 01, the first ventilation cavity 02 and the second ventilation cavity 03 in the X-axis direction and the Y-axis direction tend to be the same.

[0052] 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, wherein a second air outlet 15 is provided at the top of the second ventilation cavity 03. The first air outlet 121 is suitable for upward air discharge, and in actual application, an upper air outlet louver can be installed at the first air outlet 121, and the upper air outlet louver belongs to the prior art, and this embodiment will not be described in detail.

[0053] The cabinet 10 is further provided with a cover 16, which is at least partially located in the protective cavity 01 or below the protective cavity 01 and forms an independent heat dissipation duct; Figures 3 - 4 In the embodiment, the cover body 16 is completely located in the protective cavity 01, and the cover body 16 is placed at the bottom of the protective cavity 01. The cover body 16 includes 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 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 connected to the bottom end of the vertical section 161, and the vertical section 161 is basically located in the middle of the protective 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, see Figure 4 and Figure 6 A wind inducing surface 1611 and two wind guiding surfaces 1612 are provided at the top of the vertical section 161. The wind inducing surface 1611 is parallel to the X-axis and the Y-axis. The two wind guiding surfaces 1612 are respectively located at the two ends of the wind inducing surface 1611 along the X-axis direction. The two wind guiding surfaces 1612 are arranged along the X-axis direction and gradually move away from each other from top to bottom in an eight-shaped shape.

[0054] In this embodiment, the third air inlet 17 of the heat dissipation 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 which is connected to the two horizontal sections 162 and is suitable for discharging air upward, that is, the third air outlet 122 of the heat dissipation duct is opened on the second side wall 12. The second centrifugal fan (not shown in the figure) is placed in the horizontal section 162 and is suitable for directing the airflow of the vertical section 161 to the third air outlet 122 along the X-axis direction.

[0055] A waterproof structure 60 may be installed at the third air outlet 122. Figures 7 - 8 The waterproof structure 60 includes a frame 61 and a plurality of blades 62 arranged on the second side wall 12. The frame 61 is fixedly connected to the second side wall 12. The blades 62 are arranged in the frame 61 at intervals along the vertical direction and extend 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 arranged on the upper surface of the first guide plate 63 and inclined inward from top to bottom.

[0056] Still see Figures 3 - 4, the protection chamber 01 and the first ventilation chamber 02 are separated by a support plate 18. The support plate 18 is provided with a hot air return port 181 and a cold air outlet 182 along the X-axis direction. Among them, the hot air return port 181 is close to the second side wall 12.

[0057] In this embodiment, the protection chamber 01 is provided with a partition 19 extending in the vertical direction near the first side wall 11. The partition 19 divides the protection chamber 01 into an air passage chamber 05 close to the first side wall 11 and only used for air passage and a receiving chamber 04 close to the second side wall 12. The air passage chamber 05 is only used for air passage, which means that no protection components are placed in the air passage chamber 05; the air passage chamber 05 and the receiving chamber 04 are respectively communicated with the cold air outlet 182 and the hot air return port 181. Figures 3 - 4 Among them, both the cold air outlet 182 and the hot air return port 181 correspond to the upper part of the receiving chamber 04. See Figure 9 , the partition 19 is provided with a plurality of air passage openings 191 in the vertical direction and at least part of the air passage openings 191 are located at the bottom of the partition 19; among them, the vertical section 161 of the cover 16 and the projection of the air passage opening 191 at the bottom along the X-axis direction are staggered from each other along the Y-axis direction. Figure 9 Among them, there are two air passage openings 191 at the bottom, and the two air passage openings 191 respectively correspond to the gaps between the vertical section 161 of the cover 16 and the first abutting wall 13 and between the vertical section 161 of the cover 16 and the second abutting wall 14.

[0058] The air-cooled heat exchanger 20 is placed in the first ventilation chamber 02 and supported on the support plate 18. It is communicated with 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; in practical applications, the outer circulation air duct of the air-cooled heat exchanger 20 is communicated 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 communicated with the hot air return port 181 and the cold air outlet 182. The outer circulation air duct and the inner circulation air duct exchange heat with each other to cool the hot air at the hot air return port 181 into the cold air at the cold air outlet 182.

[0059] The heat exchange device 30 includes a liquid cooling unit 31 placed in the second ventilation chamber 03 and a radiator 32 placed in the protection chamber 01 and communicated with the cooling flow path of the liquid cooling unit 31. The radiator 32 is a liquid cooling plate in this embodiment. The cooling flow path of the liquid cooling unit 31 exchanges heat with the circulating air flow from the second air inlet 112 to the second air outlet 15 to achieve temperature reduction. The liquid cooling unit 31 belongs to the prior art and will not be elaborated in this embodiment.

[0060] See Figures 3 - 4 And Figures 10 - 11, the air guide member 40 extends along the X-axis direction, is placed inside the protection cavity 01, its upper end communicates with the cold air outlet 182, and a first air outlet 41 for downward air outlet is provided at one end close to the hot air return port 181 to convey cold air to the accommodation cavity 04, and a second air outlet 42 for air outlet to the air passing cavity 05 is provided at one end far from the hot air return port 181; a first centrifugal fan (not shown in the figure) is provided inside the air guide member 40, and the first centrifugal fan is adapted to drive the air flow at the hot air return port 181 to flow towards the cold air outlet 182, and makes the air volume at the second air outlet 42 greater than the air volume at the first air outlet 41. Figures 10 - 11 Among them, both the first air outlet 41 and the second air outlet 42 are two. The two first air outlets 41 are arranged at intervals along the X-axis direction and both extend along the Y-axis direction. The two second air outlets 42 are arranged at intervals along the Y-axis direction, and the second air outlet 42 is adapted to blow air along the X-axis direction. Of course, in other embodiments, the second air outlet 42 can also blow air obliquely downward. Figures 3 - 4 Among them, the second air outlet 42 and the hot air return port 181 are far away from each other along the X-axis direction, and the bottom air passing port 191 and the hot air return port 181 are respectively located at two farthest corners of the accommodation cavity 04.

[0061] The protection component 50 is placed inside the accommodation cavity 04 inside the protection cavity 01, and includes a reactor 55 placed inside the heat dissipation air duct and an electrical component located outside the heat dissipation air duct and inside the accommodation cavity 04. The reactor 55 is placed inside the vertical section 161 of the cover body 16. At least part of the electrical component is dissipated by the radiator 32 and at least part is dissipated by the cold air conveyed by the air-cooled heat exchanger 20. In this embodiment, at least part of the air-cooled heat dissipation of the electrical component is dissipated by the circulating air flow from the air passing port 191 to the hot air return port 181, and at least part is dissipated by the circulating air flow from the first air outlet 41 to the hot air return port 181.

[0062] In this embodiment, the projection of the protection cavity 01 along the vertical direction covers the first ventilation cavity 02 and the second ventilation cavity 03, so that the overall occupied space of the power cabinet in the X-axis direction is small, which is beneficial to reducing the floor area required for multiple power cabinets during subsequent cabinet combination; when multiple power cabinets are used side by side along the X-axis direction or the Y-axis direction, the floor area required for multiple side-by-side power cabinets 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 inlets of the first ventilation cavity 02 and the second ventilation cavity 03 are necessarily far from the ground, so that the inlet air temperature of the air-cooled heat exchanger 20 is relatively low, which ensures that the air flow at the cold air outlet 182 always has a relatively low temperature and also makes the heat dissipation efficiency of the liquid cooling unit 31 high.

[0063] In this embodiment, the two sides of the cabinet body 10 along the X-axis direction respectively form an air inlet surface and an air outlet surface. In practical applications, the first air inlet 111 and the first air outlet 121 of the first ventilation cavity 02 are communicated with the external circulation 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 communicated with the external circulation air duct of the liquid-cooled unit 31. Therefore, the above setting avoids the hot air flow short circuit caused by the hot air of the first air outlet 121 flowing back to the first air inlet 111, and also avoids the hot air flow of the second air outlet 15 from entering the second air inlet 112 or the air inlet of the downstream power cabinet, thereby improving the heat dissipation efficiency of the protection component 50; since the air inlet surface and the air outlet surface are respectively located on the two sides of the cabinet body 10 along the X-axis direction, the above setting also creates conditions for the power cabinets to be juxtaposed along the Y-axis direction.

[0064] In this embodiment, the first air outlet 121, the second air outlet 15 and the third air outlet 122 are adapted to discharge air upward. Therefore, the power cabinet forms a structure for discharging air upward. Since the density of hot air is relatively low, 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 and enter the downstream power cabinet. When multiple power cabinets are arranged side by side along the X-axis direction, the hot air from the air outlet of the upstream power cabinet will not affect the air inlet of the downstream power cabinet. In addition, the possible water inlet surface of the protection cavity 01 is reduced. In this 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-cooled 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 to the external circulation for heat dissipation is reduced. As is well known to those skilled in the art, waterproof protection needs to be done for the part of the external circulation. Therefore, the above setting reduces the possible water inlet surface of the protection cavity 01, improves the protection performance of the protection cavity 01 and reduces the protection cost.

[0065] In addition, the above setting also enables the electrical components in the protection cavity 01 to be mainly cooled by liquid cooling and air cooling. The liquid cooling method has high heat dissipation efficiency. Since both the air-cooled heat exchanger 20 and the liquid-cooled unit 31 dissipate heat through external circulation, the protection performance of the protection cavity 01 can be well improved. The combined heat dissipation method of liquid cooling and air cooling can maximize the heat dissipation efficiency of the protection component 50 in the protection cavity 01, and the protection performance of the protection cavity 01 is good. The reactor 55 is located in an independent heat dissipation air duct, and the heat dissipation efficiency is high.

[0066] Among them, the cover body 16 is located in the protection cavity 01, so the protection component 50 is basically located in the protection cavity 01, and the protection performance is high; because the cover body 16 is located in the protection cavity 01, the waterproof requirement of the cover body 16 is relatively high. In this embodiment, a waterproof structure 60 is provided at the third air outlet 122, and a first guide plate 63 and a second guide plate 64 are provided on the blade 62, wherein the first guide plate 63 is inclined outward from top to bottom. When rainwater hits the first guide plate 63, the water flow will flow downward along the first guide plate 63, thereby achieving the purpose of waterproofing. At the same time, the second guide plate 64 is inclined inward from top to bottom, which can guide the wind flow to be discharged obliquely upward when the louver is sent out, thereby avoiding the accumulation of hot air at the lower side of the power cabinet; at the same time, the second guide plate 64 can also prevent rainwater from splashing upward from the ground and entering the inside of the louver, thereby avoiding water ingress into the heat dissipation air duct and improving the protection performance of the protection cavity 01.

[0067] In the present embodiment, since the air passage cavity 05 is only used for passing wind, therefore, in actual operation, the length of the protective cavity 01 along the X-axis direction can be minimized and the length of the accommodating cavity 04 along the X-axis direction can be increased. Such a setting is conducive to increasing the wind pressure and flow rate of the wind flow in the air passage cavity 05, facilitating the outlet of the air passage 191 and the rapid flow of the wind flow in the accommodating cavity 04, thereby creating conditions for improving the heat dissipation efficiency of the protective component 50 and allowing the accommodating cavity 04 to have a larger space; wherein, the setting of the air passage cavity 05 and the air passage 191 allows the cold air from the cold air outlet 182 to flow into the relatively low-pressure accommodating cavity 04 through the air passage 191 after flowing into the air passage cavity 05. In actual application, the air passage 191 can be opened on the partition 19 at the place in the accommodating cavity 04 where it is not easy for wind to pass through. 1, thereby avoiding the formation of a wind blind zone in the accommodating chamber 04. In the present embodiment, at least part of the air outlet 191 is located at the bottom of the partition 19. Since the hot air return air outlet 181 is close to the second side wall 12, the cold air flowing out of the air outlet 191 can flow through the bottom of the accommodating chamber 04 and then flow upward, thereby avoiding the formation of a wind blind zone at the bottom of the accommodating chamber 04, and also avoiding the formation of a wind blind zone on the side of the second side wall 12. Since the air outlet 191 on the partition 19 is arranged in the vertical direction, a multi-layer cold air flow can be formed in the vertical direction. The multi-layer cold air flow can simultaneously take away the heat of the protective component 50 in the process of flowing to the hot air return air outlet 181, thereby improving the heat dissipation efficiency of the protective component 50, and making it possible to fill the accommodating chamber 04 with wind without using a spoiler fan, which is convenient for later maintenance.

[0068] In this embodiment, since the air-cooled heat exchanger 20 has a specific specification, the distance between the cold air outlet 182 and the hot air return port 181 corresponding to its internal circulation air duct cannot be too far. The setting of the air guiding member 40 enables the distance between the cold air outlet 182 and the hot air return port 181 to be relatively short, facilitating the setting of the air-cooled heat exchanger 20. Both the hot air return port 181 and the cold air outlet 182 correspond to the upper part of the accommodation cavity 04. The air flow from the cold air outlet 182 is guided into the air passing cavity 05 along a direction away from the hot air return port 181 through the air guiding member 40, so that the length of the air passing cavity 05 in the X-axis direction can be minimized as much as possible. Thus, when the air flow flows into the air passing cavity 05 from the second air outlet 42, it can be accelerated and pressurized in the air passing cavity 05, and then accelerated again when flowing out through the air passing port 191, thereby quickly taking away the heat of the protection component 50. Among them, the protection component 50 is also suitable for dissipating heat by the circulating air flow from the first air outlet 41 to the hot air return port 181. Therefore, multiple clusters of cold air flows 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 practical applications, the part with relatively low heat generation in the protection component 50 can be placed at the first air outlet 41 to ensure the balanced heat dissipation of the protection component 50. A first centrifugal fan is provided in the air guiding member 40. Compared with the axial flow fan, the centrifugal fan occupies a smaller area and can reverse the air flow. The air volume of the second air outlet 42 is greater than that of the first air outlet 41, ensuring that most of the cold air flows into the air passing cavity 05 and ensuring the balanced heat dissipation of the protection component 50.

[0069] In this embodiment, the cover 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 at the top in the Y-axis direction. The outer wall of the horizontal section 162 can guide the air flow of the air passing port 191 to the second side wall 12, further avoiding the air flow blind area in the accommodation cavity 04. The inner walls of the two horizontal sections 162 are more conducive to the air pressure balance in the vertical section 161, and thus more conducive to air outlet and heat dissipation. In addition, the structure of the cover 16 makes the air flow in the vertical section 161 easier to enter the second centrifugal fan, and the air outlet is smoother. The reactor 55 is placed in the vertical section 161 of the cover 16, which is conducive to the installation of the relatively heavy reactor 55. The second centrifugal fan is placed in the horizontal section 162, which is conducive to reversing the air flow and reduces the floor area compared with the axial flow fan. The projections of the vertical section 161 and the air passing port 191 at the bottom in the X-axis direction are offset from each other in the Y-axis direction, avoiding the cover 16 blocking the air flow of the air passing port 191.

[0070] In specific implementation, the electrical components include 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.

[0071] Specifically, the first electrical component 51 is a DC 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 at intervals along the X-axis direction and close to the first air outlet 41. The capacitor module includes an electrical plate member 521 having a plate-like structure and adapted to carry a plurality of electrical units. The electrical plate member 521 extends in the vertical direction and forms an air passage with the first electrical component 51.

[0072] 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. The air passage opening 191 is at least partially located between the first electrical component 51 and the third electrical component 53.

[0073] The fourth electrical component 54 is an AC electrical component, which is placed at the bottom of the accommodation cavity 04 close to the second side wall 12. Figures 3 - 4 In the accommodation cavity 04, there is still a distance between the fourth electrical component 54 and the bottom of the accommodation cavity 04. The third electrical component 53 is located downstream of the air flow guided by one of the air guiding surfaces 1612, and the fourth electrical component 54 is located downstream of the air flow guided by the other air guiding surface 1612.

[0074] The fifth electrical component 56 is an IGBT power module. It is close to the hot air return opening 181 and located above the fourth electrical component 54. It is cooled by the radiator 32. The second electrical component 52 is higher than the housing 16 and forms an air guiding duct extending along the X-axis direction with the air guiding surface 1611 to guide the air flow to the fifth electrical component 56.

[0075] The sixth electrical component 57 is an auxiliary source transformer. It is placed at the bottom of the accommodation cavity 04 close to the air passage opening 191 at the bottom. It has a low heat generation and is used to supply power to electrical components such as the first centrifugal fan, the second centrifugal fan, and the controller.

[0076] Among them, the electrical connection relationship of the protection component 50 is that the DC electrical component is connected to the capacitor module, the capacitor module is connected to the IGBT power module, and the IGBT power module is connected to the AC electrical component via a reactor.

[0077] See Figures 4 - 5, the air flow direction in the protection chamber 01 is that a small part of the air flow flowing out from the cold air outlet 182 flows out through the first row of air outlets 41, and most of it flows out through the second row of air outlets 42. The cold air flowing out through the first row of air outlets 41 passes through the air duct, taking away the heat of the first electrical component 51 and the second electrical component 52, and then is guided by the air guiding surface 1612 to flow obliquely downward to the third electrical component 53 and the fourth electrical component 54 to take away the heat of the third electrical component 53 and the fourth electrical component 54. Then, under the guidance of the horizontal section 162 of the cover 16, it flows to the second side wall 12, then flows upward and passes through the fifth electrical component 56 and then flows into the hot air return port 181. There is also a part that flows through the air guiding duct to the fifth electrical component 56 to take away the heat of the fifth electrical component 56, and then flows upward into the hot air return port 181; the cold air flowing out through the second row of air outlets 42 flows into the air passing chamber 05, and the flow rate is accelerated in the air passing chamber 05 to form a relatively large air pressure, and then flows out through the air passing port 191. Among them, a part passes through the third electrical component 53 to take away the heat of the third electrical component 53, and a part flows out from the air passing port 191 at the bottom, passes through the sixth electrical component 57 to take away the heat of the sixth electrical component 57, and then flows through the gap between the vertical section 161 of the cover 16 and the first abutting wall 13 and the second abutting wall 14 to the fourth electrical component 54 to take away the heat of the fourth electrical component 54, and 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 port 181.

[0078] It can be seen that the above settings make full use of the structures of the first electrical component 51 and the second electrical component 52 themselves and the layout of the protection component 50 to form an air duct, which is conducive to the downward flow of the air flow at the first row of air outlets 41, and the heat of the first electrical component 51 and the second electrical component 52 can be taken away synchronously during the downward flow. Among them, the structure of the cover 16 (the air guiding surface 1611 and the air guiding surface 1612) and the layout of the reactor 55 are also fully utilized to form an air duct in the accommodating chamber 04. Combined with the layout of the air passing port 191, it is conducive to taking away the heat of the third electrical component 53 and the fourth electrical component 54. The structure is ingenious, and the two air guiding surfaces 1612 are conducive to the rotation of the air flow in the vertical section 161, thus facilitating air outlet. The fifth electrical component 56 is cooled by the radiator 32, so the temperature of the fifth electrical component 56 is not high as a whole. Placing the fifth electrical component 56 close to the hot air return port 181 and taking away its heat through the air guiding duct can avoid the local overheating of it; the sixth electrical component 57 generates less heat. It is close to the air passing port 191 at the bottom, and the temperature rise of the cold air after passing through the sixth electrical component 57 will not be too high, so the balanced heat dissipation of other electrical components can be ensured; therefore, the above layout also makes the wiring of the first to sixth electrical components convenient, and enables each electrical component to have a high heat dissipation efficiency and the overall heat dissipation to be balanced.

[0079] In this embodiment, a first movable door and a second movable door are respectively arranged at the first end and the second end of the cabinet body 10 along the X-axis direction. When the first movable door and the second movable door are fixed, a first side wall 11 and a second side wall 12 are respectively formed. The partition 19 is close to the first end. The second side wall 12 is adapted to be hermetically docked with two horizontal sections 162 of the cover body 16 so that the horizontal sections 162 are communicated with the third air outlet 122.

[0080] When the first movable door is fixed, the first side wall 11 is formed, and the partition 19 is close to the first end. In practical applications, in order to ensure protection and electrical safety, a sealing plate is provided when the first movable door is opened to prevent the protection component 50 from being directly exposed. In order to improve the protection performance, a sealing strip is usually provided around the first movable door. There is also a gap between the sealing plate and the first movable door when they are fixed. Therefore, the above arrangement makes full use of the structure of the cabinet body 10 itself to form an air passing cavity 05. That is, the partition 19 can serve as the sealing plate of the protection component 50 and can also cooperate with the first movable door to form the air passing cavity 05, thereby minimizing the space of the power cabinet along the X-axis direction. The structure is ingenious and the cost is low. When the second movable door is fixed, the second side wall 12 is formed. The second side wall 12 is adapted to be hermetically docked with two horizontal sections 162 of the cover body 16 so that the horizontal sections 162 are communicated with the third air outlet 122. The air resistance is small, the air outlet is smooth, and it is convenient for the maintenance of the protection cavity 01.

[0081] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in the art and / or the prior art, through logical analysis, reasoning or limited experiments, can obtain modifications, equivalent replacements or other improvements to some of the technical features of the embodiments of the present invention, which should all be included in the protection scope of the present invention.

Claims

1. A power cabinet, characterized in that: include A cabinet (10) is provided with a relatively closed protective cavity (01) and a first ventilation cavity (02) and a second ventilation cavity (03) located above the protective cavity (01), wherein the projection of the protective cavity (01) in the vertical direction at least partially overlaps with the projection of the first ventilation cavity (02) and the second ventilation cavity (03) in the vertical direction; the cabinet (10) is also provided with a cover (16), wherein the cover (16) is at least partially located in the protective cavity (01) or below the protective cavity (01) and forms an independent heat dissipation duct; the first ventilation cavity (02), the second ventilation cavity (03) and the heat dissipation duct are respectively provided with a first air outlet (121), a second air outlet (15) and a third air outlet (122) on the outer wall of the cabinet (10), wherein the first air outlet (121), the second air outlet (15) and the third air outlet (122) are all suitable for discharging air upwards; an air-cooled heat exchanger (20), which is disposed in the first ventilation cavity (02) and is used to deliver cold air to the protection cavity (01) and to recover hot air from the protection cavity (01); a heat exchange device (30), comprising a liquid cooling unit (31) disposed in the second ventilation cavity (03) and a radiator (32) disposed in the protection cavity (01) and connected to a cooling channel of the liquid cooling unit (31); and A protective component (50) comprises a reactor (55) disposed in a heat dissipation air duct and an electrical component located outside the heat dissipation air duct and in the protective cavity (01), wherein the electrical component is at least partially cooled by a radiator (32) and at least partially cooled by cold air delivered by an air-cooled heat exchanger (20).

2. A power cabinet as claimed in claim 1, characterized in that: The second ventilation cavity (03), the first ventilation cavity (02) and the protective cavity (01) are arranged in sequence from top to bottom, and the projection of the protective cavity (01) in the vertical direction covers the first ventilation cavity (02) and the second ventilation cavity (03); the cabinet (10) is provided with a first side wall (11) and a second side wall (12) which are parallel to and opposite to each other in the X-axis direction, the first side wall (11) is provided with a first air inlet (111) corresponding to the first ventilation cavity (02), and is provided with a second air inlet (112) corresponding to the second ventilation cavity (03); the first air outlet (121) and the third air outlet (122) are both provided on the second side wall (12); the second air outlet (15) is provided at the top of the second ventilation cavity (03); The cover body (16) is located at the bottom of the protective cavity (01), and a waterproof structure (60) is provided at the third air outlet (122). The waterproof structure (60) comprises a frame body (61) and a plurality of blades (62) arranged on the second side wall (12). The blades (62) are arranged in the frame body (61) at intervals in the vertical direction and extend along the Y-axis direction. Each blade (62) comprises a first guide plate (63) inclined outward from top to bottom and a second guide plate (64) arranged on the upper surface of the first guide plate (63) and inclined inward from top to bottom.

3. A power cabinet as claimed in claim 2, characterized in that: The first ventilation cavity (02) and the protective cavity (01) are separated by a support plate (18); the support plate (18) is provided with a hot air return port (181) and a cold air outlet (182) connected to the air-cooled heat exchanger (20) along the X-axis direction; the hot air return port (181) is close to the second side wall (12); the protective cavity (01) is provided with a partition plate (19) extending in the vertical direction near the first side wall (11); The partition (19) divides the protective cavity (01) into an air passage cavity (05) close to the first side wall (11) and used only for passing air, and a receiving cavity (04) close to 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 electrical components are suitable for heat dissipation by circulating airflow from the air passage (191) to the hot air return outlet (181).

4. A power cabinet as claimed in claim 3, characterized in that: It also includes an air guide member (40), wherein the hot air return port (181) and the cold air outlet (182) both correspond to the upper part of 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); its end close to the hot air return outlet (181) is provided with a first air outlet (41) for discharging air downwards to convey cold air to the accommodating chamber (04); its end away from the hot air return outlet (181) is provided with a second air outlet (42) for discharging air to the air passage chamber (05); a first centrifugal fan is provided in the air guide (40), and the first centrifugal fan is suitable for driving the airflow of the hot air return outlet (181) to flow to the cold air outlet (182), and making the air volume of the second air outlet (42) greater than the air volume of the first air outlet (41); The protection component (50) is also suitable for heat dissipation by circulating airflow from the first air outlet (41) to the hot air return outlet (181).

5. A power cabinet as claimed in claim 4, characterized in that: The cabinet (10) further comprises a second centrifugal fan; the cover body (16) comprises a vertical section (161) and two horizontal sections (162) extending in 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 horizontal section (162) is connected to the third air outlet (122), and the bottom of the cabinet (10) is provided with a third air inlet (17) connected to the bottom end of the vertical section (161); the reactor (55) is disposed in the vertical section (161); the second centrifugal fan is disposed in the horizontal section (162) and is suitable for directing the airflow of the vertical section (161) to the third air outlet (122) in the X-axis direction; the projections of the vertical section (161) and the air outlet (191) located at the bottom in the X-axis direction are staggered in the Y-axis direction.

6. A power cabinet as claimed in claim 5, characterized in that: The protective component (50) is provided with a first electrical component (51) and a second electrical component (52) arranged at intervals along the X-axis direction near the first air outlet (41), and an air duct corresponding to the first air outlet (41) is formed between the first electrical component (51) and the second electrical component (52); the vertical section (161) of the cover body (16) is provided with an air guide surface (1612) inclined relative to both the vertical direction and the X-axis direction corresponding to the air duct so that the airflow in the air duct is suitable for inclined downward flow.

7. A power cabinet as claimed in claim 6, characterized in that: The first electrical component (51) is close to the partition (19), and the protective component (50) further includes a third electrical component (53), wherein the third electrical component (53) is close to the partition (19) and is 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).

8. A power cabinet as claimed in claim 7, characterized in that: The protective component (50) further includes a fourth electrical component (54), which is disposed at the bottom of the accommodating cavity (04) near the second side wall (12); the cover body (16) is provided with two wind guide surfaces (1612) which 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 wind flow guided by one of the wind guide surfaces (1612); and the fourth electrical component (54) is located downstream of the wind flow guided by the other wind guide surface (1612).

9. A power cabinet as claimed in claim 8, characterized in that: The second electrical component (52) is a capacitor module, which comprises an electrical plate component (521) having a plate-like structure and suitable for carrying a plurality of electrical units, wherein the electrical plate component (521) extends in a vertical direction and forms the air passage with the first electrical component (51); the first electrical component (51) is a DC electrical component; the third electrical component (53) is a fuse; and the fourth electrical component (54) is an AC electrical component.

10. A power cabinet as claimed in claim 9, characterized in that: The protective component (50) includes a fifth electrical component (56) and a sixth electrical component (57), the radiator (32) is suitable for dissipating heat for the fifth electrical component (56), and the fifth electrical component (56) is close to the hot air return port (181); the sixth electrical component (57) is placed at the bottom of the accommodating cavity (04) near the air outlet (191) at the bottom; the top of the vertical section (161) is also provided with an air induction surface (1611) parallel to the X-axis and the Y-axis, and the two air induction surfaces (1612) are respectively located at the two ends of the air induction surface (1611) along the X-axis direction; the second electrical component (52) is higher than the cover body (16) and forms an air induction duct extending along the X-axis direction between the second electrical component (52) and the air induction surface (1611) to guide the wind flow to the fifth electrical component (56).

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