Power cabinet capable of discharging air upwards

Abstract

The utility model discloses a power cabinet capable of discharging air upwards. The power cabinet comprises a cabinet body, an electrical assembly and a heat exchange part. The cabinet body is provided with a relatively closed protection cavity and a ventilation cavity located above the protection cavity. The ventilation cavity is provided with an air outlet in the outer wall of the cabinet body, and the air outlet is suitable for upward air outlet; the electrical assembly is located in the protection cavity. And the heat exchange part is at least partially arranged in the ventilation cavity, is subjected to heat exchange by the cold air introduced into the ventilation cavity, and is suitable for conveying a cooling medium to the protection cavity so as to dissipate heat of the electrical assembly. According to the utility model, the cabinet body is divided into the relatively closed protection cavity and the ventilation cavity communicated with the outside, the heat exchange device is arranged in the ventilation cavity, and external cold air is not in direct contact with electrical components in the protection cavity, so that not only is the protection grade of the protection cavity improved, but also the air outlet of the ventilation cavity on the outer wall of the cabinet body is configured as upward air outlet; after being discharged, the hot air is not easy to flow downwards to enter the downstream power cabinet, so that when a plurality of power cabinets are used side by side, the hot air of the air outlet of the upstream power cabinet does not affect the air inlet of the downstream power cabinet, and the heat island effect of the power station is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical technology field, concretely relates to a power cabinet of upward air outlet. BACKGROUND

[0002] The power cabinet such as photovoltaic inverter, energy storage current conversion cabinet usually includes IGBT power module, capacitor module, IGBT power module and capacitor module have higher heat dissipation requirement and protection requirement, wherein especially IGBT's heat output is bigger, the prior art often sets up relatively independent and sealed protection cavity to contain IGBT power module and capacitor module and other components needing high protection, and carries out heat dissipation to high protection component through liquid cooling unit and air-cooled air-to-air heat exchanger, wherein, liquid cooling unit is often placed on the top of cabinet body, and air-cooled air-to-air heat exchanger is placed in protection cavity and is installed on the side wall of cabinet body or is directly installed on the side wall outside cabinet body, when air-cooled air-to-air heat exchanger is installed in protection cavity, the internal space of protection cavity will be occupied, so the volume of protection cavity must be enlarged, when air-cooled air-to-air heat exchanger is installed on the side wall outside cabinet body, the power cabinet as a whole needs more floor area, therefore, no matter which kind of scheme, it will make the floor area of cabinet body as a whole large.When multiple power cabinets are used side by side, this disadvantage is more prominent.In addition, since air-cooled air-to-air heat exchanger is installed on the side wall of cabinet body, the outer circulating air duct of air-cooled air-to-air heat exchanger often extends along the vertical direction, generally, the air inlet of outer circulating air duct is located below, and the air outlet is located above, which makes the air inlet of air-cooled air-to-air heat exchanger close to the ground, when the power cabinet is used outdoors, the ground temperature is high, so the temperature of air inlet of air-cooled air-to-air heat exchanger is relatively high, which makes the overall heat dissipation efficiency in protection cavity poor.In the prior art, fuses and other devices are often cooled by air, but in the long-term use process, the air cooling mode cannot meet the protection requirements of these devices.The air cooling mode is also prone to cause short circuit of hot air flow, thereby causing heat island effect of the entire power station. SUMMARY

[0003] The utility model discloses a power cabinet of upward air outlet, which has high protection level, and heat of electrical components with high protection level is transferred to low protection area through heat exchange components, and corresponding hot air is suitable for upward air outlet, thereby avoiding heat island effect of the power station.

[0004] To achieve the above purpose, the utility model and its related embodiments adopt the following technical solutions, but are not limited to the following solutions:

[0005] The first technical solution and related embodiments thereof relate to a power cabinet with upward air outlet, comprising: a cabinet body provided with a relatively closed protection cavity and a ventilation cavity above the protection cavity; the ventilation cavity is provided with an air outlet on the outer wall of the cabinet body, which is suitable for upward air outlet; an electrical assembly is located in the protection cavity; and a heat exchange component is at least partially located in the ventilation cavity; it is heat exchanged by the cold air introduced into the ventilation cavity, and is suitable for delivering cooling medium to the protection cavity to dissipate heat from the electrical assembly.

[0006] The second technical solution is based on the first technical solution, which is a preferred embodiment of the first technical solution, wherein the ventilation cavity is a first ventilation cavity, and the projection of the protection cavity and the first ventilation cavity in the vertical direction at least partially overlaps; the first ventilation cavity is provided with a first air outlet on the outer wall of the cabinet body, which is suitable for upward air outlet; the heat exchange component is an air-cooled air-to-air heat exchanger, which is located in the first ventilation cavity and is suitable for introducing external circulating cold air into the first ventilation cavity for heat exchange, and is used to deliver internal circulating cold air to the protection cavity and recover internal circulating hot air from the protection cavity; the internal circulating cold air is used to dissipate heat from at least part of the electrical components.

[0007] The third technical solution is based on the first technical solution, which is a preferred embodiment of the first technical solution, wherein the ventilation cavity is a second ventilation cavity, and the projection of the protection cavity and the second ventilation cavity in the vertical direction at least partially overlaps; the second ventilation cavity is provided with a second air outlet on the outer wall of the cabinet body, which is suitable for upward air outlet; the heat exchange component is a liquid cooling heat exchange device, which includes a liquid cooling unit located in the second ventilation cavity and a liquid cooling radiator located in the protection cavity and communicating with the cooling flow channel of the liquid cooling unit; the liquid cooling unit is suitable for introducing external cold air into the second ventilation cavity for heat exchange, and is used to deliver cooling liquid to the liquid cooling radiator in the protection cavity; the liquid cooling radiator is used to dissipate heat from at least part of the electrical components.

[0008] The fourth technical solution is based on the first technical solution, which is a preferred embodiment of the first technical solution, wherein the ventilation cavity is a second ventilation cavity, and the projection of the protection cavity and the second ventilation cavity in the vertical direction at least partially overlaps; the second ventilation cavity is provided with a second air outlet on the outer wall of the cabinet body, which is suitable for upward air outlet; the power cabinet further comprises a fan for introducing external cold air into the second ventilation cavity; the heat exchange component is an air-cooled heat pipe heat exchanger, which has a phase change heat transfer working medium inside, and its condensation section is located in the second ventilation cavity and its evaporation section is located in the protection cavity; it is suitable for heat exchange by the external cold air introduced by the fan, and is used to deliver the phase change heat transfer working medium to the protection cavity to dissipate heat from at least part of the electrical components.

[0009] The fifth technical solution is based on the first technical solution, which is a preferred embodiment of the first technical solution. The ventilation cavity includes a first ventilation cavity and a second ventilation cavity located above the protection cavity. The projection of the protection cavity along the vertical direction at least partially overlaps the projections of the first ventilation cavity and the second ventilation cavity along the vertical direction. The cabinet body is also provided with a cover body, which is at least partially located in the protection cavity or below the protection cavity and forms 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. The first air outlet, the second air outlet, and the third air outlet are all adapted to blow air upwards. The heat exchange component includes an air-cooled air-to-air heat exchanger and a liquid-cooled heat exchange device. The air-cooled air-to-air heat exchanger is placed in the first ventilation cavity and is adapted to introduce external circulating cold air into the first ventilation cavity for heat exchange, and is used to transport internal circulating cold air to the protection cavity and recover internal circulating hot air from the protection cavity. The internal circulating cold air is used to dissipate heat from at least part of the electrical components. The liquid-cooled heat exchange device includes a liquid-cooled unit placed in the second ventilation cavity and a liquid-cooled radiator placed in the protection cavity and in communication with the cooling flow channel of the liquid-cooled unit. The liquid-cooled unit is adapted to introduce external cold air into the second ventilation cavity for heat exchange, and is used to transport cooling liquid to the liquid-cooled radiator in the protection cavity. The liquid-cooled radiator is used to dissipate heat from at least part of the electrical components. The power cabinet further includes a protection assembly, which includes a reactor placed in the heat dissipation air duct and the electrical assembly located outside the heat dissipation air duct and in the protection cavity.

[0010] The sixth technical solution is based on the fifth technical solution, which is a preferred embodiment of the fifth technical solution. The second ventilation cavity, the first ventilation cavity, and the protection cavity are sequentially arranged from top to bottom, and the projection of the protection cavity along the vertical direction covers the first ventilation cavity and the second ventilation cavity. The cabinet body is arranged with a first side wall and a second side wall parallel to each other 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 arranged at the third air outlet. The waterproof structure includes a frame arranged on the second side wall and a plurality of blades. The blades are spaced apart in the frame along the vertical direction and extend along the Y-axis direction. Each blade includes a first guide plate inclined outward from top to bottom and a second guide plate arranged on the upper surface of the first guide plate and inclined inward from top to bottom.

[0011] The seventh technical solution is based on the sixth technical solution, which is a preferred embodiment of the sixth technical solution. 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 outlet and a cold air outlet communicated with the air-cooled air-to-air heat exchanger along the X-axis direction, and the hot air return air outlet is close to the second side wall. The protection cavity is provided with a partition plate extending along the vertical direction close to the first side wall, which separates the protection cavity into a wind passing cavity close to the first side wall and only used for passing wind and a containing cavity close to the second side wall. The wind passing cavity and the containing cavity are respectively communicated with the cold air outlet and the hot air return air outlet. At least part of the electrical components is adapted to be cooled by the circulating air flow from the wind passing outlet to the hot air return air outlet. The power cabinet further comprises a wind guide member, and the hot air return air outlet and the cold air outlet are both above the containing cavity. The wind guide member extends along the X-axis direction, and its upper end is communicated with the cold air outlet. One end of the wind guide member close to the hot air return air outlet is provided with a first exhaust outlet for downward air outlet to transport cold air to the containing cavity, and the other end of the wind guide member away from the hot air return air outlet is provided with a second exhaust outlet for air outlet to the wind passing cavity. The wind guide member is provided with a first centrifugal fan. The first centrifugal fan is adapted to drive the air flow of the hot air return air outlet to the cold air outlet, and the air volume of the second exhaust outlet is greater than that of the first exhaust outlet. The protection assembly is also adapted to be cooled by the circulating air flow from the first exhaust outlet to the hot air return air outlet.

[0012] The eighth technical solution is based on the seventh technical solution, which is a preferred embodiment of the seventh technical solution. It further comprises a second centrifugal fan. The cover body comprises a vertical section and two horizontal sections extending along the X-axis direction, and the two horizontal sections are located at the two ends of the vertical section in the Y-axis direction. The horizontal section is communicated with the third air outlet, and the bottom of the cabinet body is provided with a third air inlet communicated with the bottom end of the vertical section. The reactor is placed in the vertical section. The second centrifugal fan is placed in the horizontal section and is adapted to guide the air flow of the vertical section along the X-axis direction to the third air outlet. The projection of the vertical section and the wind passing outlet at the bottom along the X-axis direction are staggered along the Y-axis direction.

[0013] The ninth technical solution is based on the eighth technical solution, and is a preferred embodiment of the eighth technical solution, wherein the protection assembly is provided with the first electrical component and the second electrical component which are arranged at intervals along the X-axis direction and close to the first air outlet, and a through air duct 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 guide surface which is inclined relative to the vertical direction and the X-axis direction and corresponds to the through air duct, so that the air flow of the through air duct is adapted to flow downwardly in an inclined manner; the first electrical component is close to the partition plate, and the protection assembly further comprises a third electrical component which is close to the partition plate and located below the first electrical component, and the through air outlet is at least partially located between the first electrical component and the third electrical component; the protection assembly further comprises a fourth electrical component which is arranged at the bottom of the accommodating cavity and close to the second side wall, and the cover body is provided with two wind guide surfaces which gradually move away from each other 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 wind guide surfaces, and the fourth electrical component is located downstream of the air flow guided by the other wind guide surface.

[0014] The tenth technical solution is based on the ninth technical solution, and is a preferred embodiment of the ninth technical solution, wherein the second electrical component is a capacitor module, the capacitor module comprises an electrical plate component which is in a plate-shaped structure and is adapted to carry a plurality of electrical units, the electrical plate component extends along the vertical direction and forms the through air duct with the first electrical component; 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 protection assembly comprises a fifth electrical component and a sixth electrical component, the liquid cooling radiator is adapted to dissipate heat for the fifth electrical component, the fifth electrical component is close to the hot air return air outlet; the sixth electrical component is arranged at the bottom of the accommodating cavity and close to the through air outlet at the bottom; the top of the vertical section is further provided with an air guide surface which is parallel to the X-axis and the Y-axis, and the two wind guide surfaces are respectively located at two ends of the air guide surface along the X-axis direction; the second electrical component is higher than the cover body and forms an air guide duct which extends along the X-axis direction between the second electrical component and the air guide surface, so as to guide the air flow to the fifth electrical component.

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

[0016] In the first technical solution and related embodiments, by separating the cabinet body into a relatively closed protection cavity and a ventilation cavity in communication with the outside, and by arranging a heat exchange device in the ventilation cavity, the external cold air does not directly contact the electrical components in the protection cavity, thereby improving the protection level of the protection cavity, and by configuring the air outlet of the ventilation cavity on the outer wall of the cabinet body to upwardly blow air, the hot air with low density is less likely to flow downward into the downstream power cabinet after being discharged, so that when multiple power cabinets are used side by side, the hot air at the air outlet of the upstream power cabinet does not affect the air inlet of the downstream power cabinet, thereby solving the power station heat island effect.

[0017] In the second to fourth technical solutions and related embodiments, the heat exchange component can be a wind-cooled air-to-air heat exchanger, a liquid-cooled heat exchange device, or a wind-cooled heat pipe heat exchanger. These three specific heat exchange devices can be cooled by external cold air, so as to deliver the cooled cooling medium (cold air, cooling liquid, or phase-change cooling working medium) to the protection cavity, thereby directly or indirectly dissipating heat from the electrical components in the protection cavity, and meeting the heat dissipation requirements of different electrical components.

[0018] In the fifth technical solution and related embodiments, the first ventilation cavity and the second ventilation cavity are located above the protection cavity, the wind-cooled air-to-air heat exchanger is arranged in the first ventilation cavity, and the projection of the protection cavity and the first ventilation cavity in the vertical direction at least partially overlaps, so that the wind-cooled air-to-air heat exchanger does not occupy the internal space of the protection cavity or the side space of the cabinet body, but fully utilizes the height space of the cabinet body. Similarly, the second ventilation cavity also fully utilizes the height space of the cabinet body, so that the above arrangement reduces 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 and the second ventilation cavity in the vertical direction completely overlaps, the overall floor area of the power cabinet is minimized, and the projection area of the power cabinet on the ground in the vertical direction is minimized, 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 floor area required by the multiple power cabinets used side by side can be reduced as a whole. 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 away from the ground, so that the air inlet temperature of the wind-cooled air-to-air heat exchanger is relatively low, thereby ensuring that the air flow at the air outlet of the cold air always has a low temperature, and 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 necessarily open on the side of the cabinet body, but can open on the top of the cabinet body, so as to be less likely to disturb the downstream power cabinet when multiple power cabinets are used side by side, and even if the hot air flows out from the side of the top of the cabinet body, the hot air with low density is also less likely to affect the downstream power cabinet.

[0019] Since the first air outlet, the second air outlet and the third air outlet are adapted to blow air upward, the power cabinet forms a structure for blowing air upward, and since hot air has a lower density, the hot air discharged from the first air outlet, the second air outlet and the third air outlet is not easy to flow downward into the downstream power cabinet, so that when multiple power cabinets are used side by side along the X-axis direction or the Y-axis direction, the hot air of the air outlet of the upstream power cabinet will not affect the air inlet of the downstream power cabinet. In addition, the water inlet surface that may exist in the protection cavity is reduced. In the technical solution, the water inlet surface is mainly formed on the upper cavity wall of the protection cavity. Compared with the technical solution in which the liquid cooling unit is located above the protection cavity and the air-to-air 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 known by those skilled in the art, the part of the external circulation needs to be waterproofed, and therefore, 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.

[0020] In addition, the above-mentioned arrangement also makes the protection components in the protection cavity mainly dissipate heat through liquid cooling and air cooling, and the liquid cooling has a high heat dissipation efficiency. Since the air-to-air heat exchanger and the liquid cooling unit both dissipate heat through external circulation, the protection of the protection cavity can be improved. The liquid cooling and air cooling cooperatively maximize the heat dissipation efficiency of the protection components in the protection cavity, and the protection cavity has good protection. In practical applications, all the protection components except the electric reactor can be placed in the protection cavity, thereby improving the protection of the protection components. The electric reactor is located in a separate heat dissipation air duct, and has a high heat dissipation efficiency.

[0021] In the sixth technical solution and the related embodiments, the projection of the protection cavity along the vertical direction covers the first ventilation cavity and the second ventilation cavity, so that the overall power cabinet occupies a small space along the X-axis direction, which is conducive to reducing the floor area required by multiple power cabinets when the power cabinets are combined subsequently; wherein 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 port is arranged on the top of the power cabinet, that is, the two sides of the cabinet body along 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, so that the above-mentioned arrangement avoids the hot air of the first air outlet from flowing back to the first air inlet to cause a short circuit of the hot air flow, and also avoids the hot air of the second air outlet from flowing into 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 located on the two sides of the cabinet body along the X-axis direction, the above-mentioned arrangement also creates conditions for the power cabinet to be combined along the Y-axis direction.

[0022] The cover body is located in the protection cavity, so that the protection assembly is basically located in the protection cavity, and the protection is high; since the cover body is located in the protection cavity, the waterproof requirement of the cover body is high, in the technical solution, the waterproof structure is arranged at the third air outlet, the first guide plate and the second guide plate are arranged on the blade, the first guide plate is inclined outward from top to bottom, when rain hits the first guide plate, the water flow will flow downward along the first guide plate, thereby achieving the purpose of waterproofing, and the second guide plate is inclined inward from top to bottom, so that when the air flow is sent out from the louver, the air flow is sent out obliquely upward, thereby avoiding the accumulation of hot air at the lower side of the power cabinet; at the same time, the second guide plate can also prevent rainwater from entering the louver when the rainwater splashes upward from the ground, thereby avoiding water entering the heat dissipation air duct and improving the protection of the protection cavity.

[0023] In the seventh technical solution and the related embodiments, the air passing cavity is only used for air passing, that is, the air passing cavity is not used for placing the protection assembly, so in actual operation, the length of the air passing cavity along the X-axis direction can be minimized and the length of the containing cavity along the X-axis direction can be increased, and such a setting is conducive to increasing the air pressure and flow rate of the air flow in the air passing cavity, facilitating the air outlet of the air passing opening and the rapid flow of the air flow in the containing cavity, thereby creating conditions for improving the heat dissipation efficiency of the protection assembly and increasing the space of the containing cavity; wherein, the setting of the air passing cavity and the air passing opening enables the cold air of the cold air outlet to flow into the relatively low-pressure containing cavity through the air passing opening after flowing into the air passing cavity, and in actual application, the air passing opening can be opened on the partition plate for places in the containing cavity that are not easy to pass air, thereby avoiding the formation of an air flow blind area in the containing cavity, and in the technical solution, at least part of the air passing opening is located at the bottom of the partition plate, since the hot air return opening is close to the second side wall, the cold air flowing out of the air passing opening can flow through the bottom of the containing cavity and then flow upward, thereby avoiding the formation of an air flow blind area at the bottom of the containing cavity and avoiding the formation of an air flow blind area on one side of the second side wall, since the air passing openings on the partition plate 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 simultaneously carry away the heat of the protection assembly during the flow to the hot air return opening, thereby improving the heat dissipation efficiency of the protection assembly and enabling the turbulent fan to be distributed with air flow everywhere in the containing cavity, thereby facilitating later maintenance. In addition, in the technical solution, the hot air return opening and the cold air outlet are arranged along the X-axis direction, which fully utilizes the height space of the cabinet body compared with the vertical arrangement in the prior art, thereby saving the floor area.

[0024] Further, since the air-cooled air-to-air heat exchanger has a specific specification, the distance between the cold air outlet and the hot air return outlet corresponding to the internal circulation air duct cannot be too far. The arrangement of the air guide member makes the distance between the cold air outlet and the hot air return outlet shorter, facilitating the arrangement of the air-cooled air-to-air heat exchanger. The hot air return outlet and the cold air outlet correspond to the upper part of the accommodating cavity. The air flow of the cold air outlet is guided by the air guide member to the air passing cavity in a direction away from the hot air return outlet, 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 when flowing out through the air passing opening, so that the heat of the protection assembly can be quickly carried away; wherein the protection assembly is also adapted to dissipate heat by the circulation air flow from the first air outlet to the hot air return outlet, 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. The air guide member 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 is greater than that of the first air outlet, ensuring that most of the cold air flows into the air passing cavity and ensuring balanced heat dissipation of the protection assembly.

[0025] In technical solution eight and 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 the air outlet 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 reactor with relatively heavy weight, and the second centrifugal fan is arranged in the horizontal section, which is conducive to realizing air flow reversing and reducing the footprint compared with an 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.

[0026] In technical solution nine and related embodiments, the first electrical component and the second electrical component form an air passing duct corresponding to the first air outlet, which makes full use of the structure of the first electrical component and the second electrical component and the layout of the protection assembly, is conducive to the downward flow of the air flow of the first air outlet, and can simultaneously carry away the heat of the first electrical component and the second electrical component during the downward flow. The cover body is also provided with an air guide surface to make the air flow of the first air outlet flow 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 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.

[0027] The air vent is located at least partially between the first electrical component and the third electrical component, so that the first and second electrical components can be cooled by the cold air discharged from the first exhaust vent, and the third electrical component can be cooled by the cold air discharged from the air vent, resulting in high heat dissipation efficiency.

[0028] The air guide surfaces of the enclosure can direct the airflow from the first exhaust vent to the third and fourth electrical components, respectively, thereby improving the heat dissipation efficiency of the third and fourth electrical components. Furthermore, the two air guide surfaces facilitate the rotation of airflow within the vertical section of the enclosure, which in turn benefits the airflow from the horizontal section.

[0029] In technical solution ten 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, making full use of the structure of the capacitor module itself to form an 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 each electrical component of the protection component, but also enables each electrical component to have high heat dissipation efficiency.

[0030] The cold air discharged from the first exhaust vent is guided downwards through the air duct to the third and fourth electrical components. A portion also flows through the duct to the fifth electrical component, preventing localized high temperatures caused by the fifth component being close to the hot air return vent. The air vent of the sixth electrical component is located at the bottom of the housing cavity, allowing it to quickly dissipate heat and then cool other electrical components. In practical applications, the sixth electrical component generates relatively little heat, thus ensuring balanced heat dissipation for all components. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the power cabinet according to an embodiment of the present utility model. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the power cabinet according to an embodiment of the present utility model. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the internal structure of the power cabinet in an embodiment of this utility model. Figure 1 ;

[0035] Figure 4 This is a schematic diagram of the internal structure of the power cabinet in an embodiment of this utility model. Figure 2 The cover conceals a horizontal section;

[0036] Figure 5 For Figure 4 The wind direction flow schematic diagram of the air conditioner is shown in the figure.

[0037] Figure 6 For the schematic diagram of the second side wall of the utility model embodiment is shown in the figure.

[0038] Figure 7 For the schematic diagram of the second side wall of the utility model embodiment is shown in the figure.

[0039] Figure 8 For the schematic diagram of the waterproof structure of the utility model embodiment is shown in the figure.

[0040] Figure 9 For the schematic diagram of the first side wall of the hidden part of the utility model embodiment is shown in the figure.

[0041] Figure 10 For the schematic diagram of the air guide piece of the utility model embodiment is shown in the figure. Figure 1 .

[0042] Figure 11 For the schematic diagram of the air guide piece of the utility model embodiment is shown in the figure. Figure 2 .

[0043] Main figure mark explanation:

[0044] 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 abutment wall 13;Second abutment wall 14;Second air outlet 15;Cover body 16;Vertical section 161;Air guide surface 1611;Air guide surface 1612;Horizontal section 162;Third air inlet 17;Supporting plate 18;Hot air return air outlet 181;Cold air air outlet 182;Partition 19;Air passage 191;Protective cavity 01;First ventilation cavity 02;Second ventilation cavity 03;Accommodation cavity 04;Air passage 05;Air-cooled air-to-air heat exchanger 20;Liquid-cooled heat exchange device 30;Liquid-cooled unit 31;Liquid-cooled radiator 32;Air guide piece 40;First air outlet 41;Second air outlet 42;Protective 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 61;Blade 62;First guide plate 63;Second guide plate 64. Specific implementation

[0045] 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 excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0046] In the claims, the description and the above drawings of the present application, unless otherwise explicitly limited, the terms such as "first", "second", or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0047] In the claims, the description and the above drawings of the present application, unless otherwise explicitly limited, for the terms of orientation, such as "center", "transverse", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like 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 are not intended to 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.

[0048] In the claims, the description 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 without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0049] In the claims, the description and the above drawings of the present application, such as the terms "including", "having" and their variants, are intended to mean "including but not limited to".

[0050] In the claims and the description except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only refer to the features with one of the above directions being perpendicular to the features with another direction, and do not require them to 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.

[0051] Referring to Figures 1-11 , Figures 1-11A power cabinet is shown, comprising a cabinet body 10, an air-cooled air-to-air heat exchanger 20, a liquid-cooled heat exchanger 30, a wind guide 40, a protection assembly 50 and a second centrifugal fan (not shown in the figure). Among them, the air-cooled air-to-air heat exchanger 20 and the liquid-cooled heat exchanger 30 constitute the heat exchange components of the main electrical components in the power cabinet.

[0052] Referring to Figures 1-2 , the cabinet body 10 is in the shape of a rectangular parallelepiped, 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.

[0053] 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, the projection of the protection cavity 01 in the vertical direction at least partially overlaps the projection 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.

[0054] 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. In this embodiment, "blowing air upward" means that the blowing angle is upward, for example, blowing air toward the top of the cabinet, or blowing air upward at an angle.

[0055] 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 Y-axis direction of the top of the vertical section 161; 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 andFigure 6 The top of the vertical section 161 is provided with a leading air surface 1611 parallel to the X-axis and the Y-axis, and two guide air surfaces 1612 located at the two ends of the leading air surface 1611 along the X-axis direction, the two guide air surfaces 1612 are arranged along the X-axis direction and gradually away from each other in a shape of a splayed end.

[0056] 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. The second centrifugal fan (not shown in the figure) is arranged in the horizontal section 162 and is adapted to guide the air flow of the vertical section 161 along the X-axis direction to the third air outlet 122.

[0057] The 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.

[0058] 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.

[0059] In this 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 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 cavity 05 is only used for air passing, which means that the through cavity 05 is not used for placing protection assemblies; the through 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 this 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 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 embodiment, the bottom has two air passing openings 191, which correspond to the gap between the vertical section 161 of the cover 16 and the first abutting wall 13 and the gap between the second abutting wall 14, respectively.

[0060] The air-cooled air-to-air 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 air-cooled air-to-air heat exchanger 20 has an outer circulation fan, and an outer circulation air duct is in communication with the first air inlet 111 and the first air outlet 121. The outer circulation fan introduces the outer circulation cold air into the first air duct 02. The air-cooled air-to-air heat exchanger 20 has an inner circulation air duct 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 exchange heat 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. The inner circulation cold air is used to dissipate heat for some electrical components in the protection cavity 01.

[0061] The liquid-cooled heat exchange device 30 includes a liquid-cooled unit 31 arranged in the second air duct 03 and a liquid-cooled radiator 32 arranged in the protection cavity 01 and in communication with the cooling flow channel of the liquid-cooled unit 31. The liquid-cooled radiator 32 is a liquid-cooled plate in the embodiment. The cooling flow channel of the liquid-cooled 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-cooled unit 31 has a fan that introduces external cold air into the second air duct 03 for heat exchange, thereby outputting cooling liquid to the protection cavity 01. The liquid-cooled unit 31 can use existing technology, which will not be described in detail in the embodiment.

[0062] Referring to Figures 3-4 and Figures 10-11 , the air guide 40 extends along the X-axis direction and is arranged in the protection cavity 01. The upper end of the air guide 40 is in communication with the cold air outlet 182. The end of the air guide 40 close to the hot air return air outlet 181 is provided with a first air outlet 41 that discharges air downward to deliver cold air to the containing cavity 04. The end of the air guide 40 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 40 is provided with a first centrifugal fan (not shown in the figure). The first centrifugal fan 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 embodiment, the first air outlet 41 and the second air outlet 42 are both 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. The second air outlet 42 is adapted to discharge air along the X-axis direction. Of course, in other embodiments, the second air outlet 42 can also discharge air obliquely downward. Figures 3-4In the 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 passage 191 and the hot air return air outlet 181 are respectively located at two most distant corners of the accommodating cavity 04.

[0063] The protection assembly 50 is arranged in the accommodating cavity 04 in the protection cavity 01, and 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 accommodating 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 liquid cooling radiator 32 and the cold air delivered by the air-cooled air-to-air 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 passage 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.

[0064] In the 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 power cabinet occupies a small space along the X-axis direction, which is beneficial to reducing the floor area required by multiple power cabinets when the power cabinets are combined. When multiple power cabinets are used side by side along the X-axis direction or the Y-axis direction, the floor area required by the multiple power 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 away from the ground, so that the air inlet temperature of the air-cooled air-to-air heat exchanger 20 is relatively low, thereby ensuring that the air flow of the cold air outlet 182 always has a low temperature, and the heat dissipation efficiency of the liquid cooling unit 31 is high.

[0065] In the embodiment, the two sides of the cabinet body 10 along the X-axis direction form an air inlet surface and an air outlet surface, respectively. 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 air-to-air 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 hot air flow of the first air outlet 121 returning to the first air inlet 111, causing a short circuit of the hot air flow, and also avoids the hot air flow of the second air outlet 15 entering the second air inlet 112 or the air inlet of the downstream power 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 at the two sides of the cabinet body 10 along the X-axis direction, the above arrangement also creates conditions for the power cabinets to be combined along the Y-axis direction.

[0066] 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 power 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 power cabinet, so that when multiple power cabinets are used side by side along the X-axis direction, the hot air of the air outlet of the upstream power cabinet does not affect the air inlet of the downstream power 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 air-to-air heat exchanger 20 is located beside the protection cavity 01, the part of the protection cavity 01 connected with the external circulation heat dissipation is reduced. As known by those skilled in the art, the part of the external 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.

[0067] 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 air-to-air heat exchanger 20 and the liquid cooling unit 31 both dissipate heat through external circulation, the protection of the protection cavity 01 can be improved. The liquid cooling and air cooling can 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 reactor 55 is located in a separate heat dissipation air duct, so that the heat dissipation efficiency is high.

[0068] In addition, a wind-cooled heat pipe heat exchanger (not shown in the figure) can be further provided to further enhance the heat dissipation effect of the electrical components in the protection cavity. The wind-cooled heat pipe heat exchanger has a phase change heat transfer working medium. The condensation section of the phase change heat transfer working medium is arranged in the second ventilation cavity 03, and the evaporation section is arranged in the protection cavity 01. The wind-cooled heat pipe heat exchanger is adapted to exchange heat with the external cold air introduced by the fan (which can be the fan of the liquid cooling unit 31), and is used to transport the phase change heat transfer working medium to the protection cavity 01 to dissipate heat for at least part of the electrical components.

[0069] The cover body 16 is located in the protection cavity 01, so that the protection assembly 50 is basically located in the protection cavity 01, and the protection is high; since the cover body 16 is located in the protection cavity 01, the waterproof requirement of the cover body 16 is higher, in the embodiment, the 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, at the same time, the second guide plate 64 is inclined inward from top to bottom, and when the air flow is sent out from the louver, the air flow is sent out in an oblique upward direction, thereby avoiding that the hot air is accumulated at the lower side of the power cabinet; at the same time, the second guide plate 64 can also prevent rain from entering the louver when the rain splashes upward from the ground, thereby avoiding water entering the heat dissipation air duct, and improving the protection of the protection cavity 01.

[0070] In the embodiment, since the air passing cavity 05 is only used for air passing, in actual operation, the length of the protection cavity 01 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 is increased, so that the air pressure and flow rate of the air flow in the air passing cavity 05 are increased, the air flow of the air passing opening 191 is facilitated, and the rapid flow of the air flow in the containing cavity 04 is facilitated, thereby creating conditions for improving the heat dissipation efficiency of the protection assembly 50, and the containing cavity 04 has a large space; the cold air of the cold air outlet 182 can flow into the containing cavity 04 with relatively low pressure through the air passing opening 191 after flowing into the air passing cavity 05, in actual application, the air passing opening 191 can be arranged on the partition plate 19 for places in the containing cavity 04 that are not easy to pass air, thereby avoiding the formation of a blind area of the air flow in the containing cavity 04, 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 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 opening 191 on the partition plate 19 is arranged in the vertical direction, a plurality of layers of cold air flow can be formed in the vertical direction, and the plurality of layers of cold air flow can synchronously take away the heat of the protection assembly 50 in the process of flowing toward the hot air return opening 181, thereby improving the heat dissipation efficiency of the protection assembly 50, and without the need of the turbulent fan, the air flow can be distributed everywhere in the containing cavity 04, thereby facilitating later maintenance.

[0071] In the embodiment, the air-cooled air-to-air 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 arrangement of the air guide member 40 makes the distance between the cold air outlet 182 and the hot air return outlet 181 shorter, which facilitates the arrangement of the air-cooled air-to-air heat exchanger 20. The hot air return outlet 181 and the cold air outlet 182 both correspond to the upper part of 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, so that the air flow flowing into the air passing cavity 05 from the second air outlet 42 can be accelerated and pressurized in the air passing cavity 05, and then accelerated again when flowing out through the air passing outlet 191, so that the heat of the protection assembly 50 can be quickly taken away; wherein 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.

[0072] In the embodiment, the cover body 16 includes a vertical section 161 and two horizontal sections 162, which 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 outlet 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 outlet 191 located at the bottom along the X-axis direction is staggered along the Y-axis direction, avoiding the cover body 16 blocking the air flow of the air passing outlet 191.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The fourth electrical component 54 is an alternating current electrical component, which is arranged on the bottom of the accommodating cavity 04 close to the second side wall 12, 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.

[0077] The fifth electrical component 56 is an IGBT power module, which is close to the hot air return air outlet 181 and located above the fourth electrical component 54, which is cooled by the liquid cooling radiator 32, and 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.

[0078] The sixth electrical component 57 is an auxiliary transformer, which is arranged on the bottom of the accommodating cavity 04 close to the air passage 191 on the bottom, and has a relatively low heat dissipation, which is used to supply power to electrical components such as the first centrifugal fan, the second centrifugal fan, the controller, etc.

[0079] 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.

[0080] 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.

[0081] 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 liquid cooling radiator 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 has a low heat generation amount and is close to the bottom air passage 191. The temperature rise of the cold air after passing through the sixth electrical component 57 is not high, 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 enables each electrical component to have a high heat dissipation efficiency and balanced overall heat dissipation.

[0082] In the embodiment, the first end and the second end of the cabinet body 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.

[0083] 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 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 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, thus, the above-mentioned arrangement fully utilizes the structure of the cabinet body 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, so as to maximize the reduction of the space of the power 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.

[0084] The above description and embodiment are used to explain the protection scope of the utility model, but do not constitute the limitation on the protection scope of the utility model. Through the inspiration of the utility model or the above-mentioned embodiment, the modification, equivalent replacement or other improvement of the utility model embodiment or one part of the technical features can be obtained by the ordinary skill in the art, the common knowledge, the ordinary skill in the art and / or the prior art through logical analysis, reasoning or limited test, and should be included in the protection scope of the utility model.

Claims

1. A power cabinet with upward airflow, characterized in that, include: The cabinet (10) has a relatively sealed protective cavity (01) and a ventilation cavity located above the protective cavity (01); the ventilation cavity has an air outlet on the outer wall of the cabinet (10), and the air outlet is adapted to discharge air upwards; Electrical components, which are located within the protective cavity (01); and A heat exchange component, at least partially disposed within the ventilation cavity; It is subjected to heat exchange by the cold air introduced into the ventilation cavity and is adapted to deliver a cooling medium to the protective cavity (01) for heat dissipation of the electrical components.

2. The power cabinet as described in claim 1, characterized in that, The ventilation cavity is a first ventilation cavity (02), and the projection of the protective cavity (01) and the first ventilation cavity (02) in the vertical direction at least partially overlaps; the first ventilation cavity (02) is provided with a first air outlet (121) suitable for upward airflow on the outer wall of the cabinet (10); The heat exchange component is an air-cooled air-to-air heat exchanger (20), which is placed in the first ventilation cavity (02) and is adapted to introduce external circulating cold air into the first ventilation cavity (02) for heat exchange, and is used to deliver internal circulating cold air to the protective cavity (01) and recover internal circulating hot air from the protective cavity (01); The internal circulating cool air is used to dissipate heat from at least a portion of the electrical components.

3. The power cabinet as described in claim 1, characterized in that, The ventilation cavity is a second ventilation cavity (03), and the projection of the protective cavity (01) and the second ventilation cavity (03) in the vertical direction at least partially overlaps; the second ventilation cavity (03) is provided with a second air outlet (121) suitable for upward airflow on the outer wall of the cabinet (10); The heat exchange component is a liquid-cooled heat exchange device, which includes a liquid-cooled unit (31) placed in the second ventilation cavity (03) and a liquid-cooled radiator (32) placed in the protective cavity (01) and connected to the cooling channel of the liquid-cooled unit (31). The liquid cooling unit (31) is adapted to introduce external cold air into the second ventilation cavity (03) for heat exchange, and is used to deliver coolant to the liquid cooling radiator (32) in the protective cavity (01); The liquid-cooled radiator (32) is used to dissipate heat from at least a portion of the electrical components.

4. The power cabinet as described in claim 1, characterized in that, The ventilation cavity is a second ventilation cavity (03), and the projection of the protective cavity (01) and the second ventilation cavity (03) in the vertical direction at least partially overlaps; the second ventilation cavity (03) is provided with a second air outlet (121) suitable for upward airflow on the outer wall of the cabinet (10); The power cabinet also includes a fan for introducing external cold air into the second ventilation cavity (03); The heat exchange component is an air-cooled heat pipe heat exchanger, which contains a phase change heat exchange medium. Its condensation section is placed in the second ventilation cavity (03), and its evaporation section is placed in the protective cavity (01). It is adapted to exchange heat with external cold air introduced by the fan and is used to deliver the phase change heat exchange medium to the protective cavity (01) to dissipate heat from at least a portion of the electrical components.

5. The power cabinet as described in claim 1, characterized in that, The ventilation cavity includes a first ventilation cavity (02) and a second ventilation cavity (03) located above the protective cavity (01). The projection of the protective cavity (01) in the vertical direction at least partially overlaps with the projections 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), which is at least partially located inside 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), and the first air outlet (121), the second air outlet (15) and the third air outlet (122) are all suitable for upward air discharge; The heat exchange components include: an air-cooled air-to-air heat exchanger (20) and a liquid-cooled heat exchange device (30); The air-cooled air-to-air heat exchanger (20) is placed inside the first ventilation cavity (02) and is adapted to introduce external circulating cold air into the first ventilation cavity (02) for heat exchange, and is used to deliver internal circulating cold air to the protective cavity (01) and recover internal circulating hot air from the protective cavity (01); the internal circulating cold air is used to dissipate heat from at least a portion of the electrical components; The liquid-cooled heat exchange device includes a liquid-cooled unit (31) placed in the second ventilation cavity (03) and a liquid-cooled radiator (32) placed in the protective cavity (01) and communicating with the cooling channel of the liquid-cooled unit (31); the liquid-cooled unit (31) is adapted to introduce external cold air into the second ventilation cavity (03) for heat exchange and to supply coolant to the liquid-cooled radiator (32) in the protective cavity (01); the liquid-cooled radiator (32) is used to dissipate heat for at least a portion of the electrical components; the power cabinet also includes a protective assembly (50), which includes a reactor (55) placed in the heat dissipation duct and the electrical components located outside the heat dissipation duct and inside the protective cavity (01).

6. A power cabinet as described in claim 5, characterized in that, The second ventilation cavity (03), the first ventilation cavity (02), and the protective cavity (01) are arranged sequentially from top to bottom. The projection of the protective cavity (01) along 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) that are parallel to each other and opposite to each other along the X-axis. 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 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 (16) is located at the bottom of the protective cavity (01). A waterproof structure (60) is provided at the third air outlet (122). The waterproof structure (60) includes a frame (61) and several blades (62) on the second side wall (12). Each blade (62) is arranged vertically at intervals in the frame (61) and extends along the Y-axis. Each blade (62) includes a first guide plate (63) that is inclined outward from top to bottom and a second guide plate (64) that is provided on the upper surface of the first guide plate (63) and is inclined inward from top to bottom.

7. A power cabinet as described in claim 6, 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) communicating with the air-cooled air-to-air 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 (19) extending vertically near the first side wall (11). The partition (19) divides the protective cavity (01) into an air passage cavity (05) near the first sidewall (11) and used only for air passage, and a receiving cavity (04) near the second sidewall (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); at least a portion of the electrical components are adapted for heat dissipation from the circulating airflow from the air passage (191) to the hot air return outlet (181); The power cabinet also includes an air guide (40), and 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, with its upper end connected to the cold air outlet (182). The end of the air guide (40) 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), and the end of the air guide (40) 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 outlet (181) to the cold air outlet (182), and to make the airflow of the second air outlet (42) greater than that of the first air outlet (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).

8. A power cabinet as described in claim 7, characterized in that, It also includes a second centrifugal fan; 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 horizontal sections (162) are connected to the third air outlet (122), 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 placed in the vertical section (161); the second centrifugal fan is placed in the horizontal section (162) and is adapted to guide 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 outlet (191) located at the bottom along the X-axis direction is offset from each other along the Y-axis direction.

9. A power cabinet as described in claim 8, 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 near the first exhaust port (41), and an air passage corresponding to the first exhaust port (41) is formed between the first electrical component (51) and the second electrical component (52); 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 to make the airflow of the air passage suitable for inclined downward flow; The first electrical component (51) is close to the partition (19), and the protective assembly (50) further includes a third electrical component (53), which 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 protective assembly (50) also includes a fourth electrical component (54), which is located at the bottom of the accommodating cavity (04) near the second sidewall (12). 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. 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).

10. A power cabinet as described in claim 9, characterized in that, The second electrical component (52) is a capacitor module, which includes an electrical board (521) with a plate-like structure and adapted to carry a plurality of electrical units. The electrical board (521) extends vertically and forms the air passage between itself and the first electrical component (51). 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 protective assembly (50) includes a fifth electrical component (56) and a sixth electrical component (57). The liquid-cooled radiator (32) is adapted to dissipate heat for the fifth electrical component (56). The fifth electrical component (56) is located near the hot air return port (181). The sixth electrical component (57) is located near the bottom air outlet (191) at the bottom of the accommodating cavity (04). The top of the vertical section (161) is also provided with an air-guiding surface (1611) parallel to the X-axis and Y-axis. Two air-guiding surfaces (1612) are located at the two ends of the air-guiding surface (1611) along the X-axis direction. The second electrical component (52) is higher than the cover (16) and forms an air-guiding channel extending along the X-axis direction between itself and the air-guiding surface (1611) to guide the airflow to the fifth electrical component (56).

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