CN117641836A - A power cabinet - Google Patents

Abstract

The invention discloses a power cabinet, which includes a cabinet, a heat exchange device and a cooling fan. The top of the cabinet is provided with an air cavity, the side of the air cavity is provided with a main air inlet, and the top is provided with an air outlet; heat exchanger The device is provided with two heat exchange parts located in the wind cavity; the two heat exchange parts are arranged at an angle, one end of which intersects with each other along the first direction, and the other end is away from each other to form an opening; the heat exchange part is provided with a waiting The cooling part and several air ducts, each of the air ducts is suitable for passing wind in the horizontal direction; the cooling fan drives the air flow from the air inlet to the exhaust port through the air duct. The power cabinet of the present invention prevents the heat flow of the upstream power cabinet from interfering with the downstream power cabinet and occupies a small area. The heat exchange part of the power cabinet is not prone to sand accumulation and has high heat exchange efficiency.

Description

A power cabinet

Technical field

The invention relates to the technical field of power equipment, and in particular to a power cabinet.

Background technique

Power cabinets such as photovoltaic inverters and energy storage converter cabinets usually have high heat dissipation requirements. The air inlet and outlet of the power cabinet are often set on the front and rear sides of the power cabinet respectively. In practical applications, there are often many The power cabinets are spaced apart in the front and rear direction. Therefore, the air flow organization between the power cabinets interferes with each other. For example, the hot air from the upstream power cabinet will enter the cold air inlet of the downstream power cabinet; for example, the hot air from the two power cabinets will blow against each other. Causes the air flow organization to be disordered and interfere with each other. The above factors often cause the "heat island" effect and increase the temperature rise of the equipment, which ultimately leads to equipment derating. The existing technology often involves increasing the distance between power cabinets and changing the layout of the power cabinets. However, increasing the spacing between power cabinets increases the floor space, and even if the spacing between power cabinets is increased, heat flow turbulence will still have an impact.

Contents of the invention

The object of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and provide a power cabinet so that the heat flow of the upstream power cabinet will not interfere with the downstream power cabinet, and it occupies a small area and the heat exchange device of the power cabinet is not easy to install. Accumulated sand, high heat transfer efficiency.

In order to achieve the above objects, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

A power cabinet includes a cabinet body, an air passage cavity is provided on the top, a main air inlet is provided on the side of the air passage cavity along a first horizontal direction, and an air exhaust outlet is provided on the top; a heat exchange device is provided There are two heat exchange parts located in the wind cavity; the two heat exchange parts are arranged at an angle, one end of which intersects with each other along the first direction, and the other end is away from each other to form an opening; the heat exchange part is provided with a part to be cooled and a plurality of air ducts, each of which is suitable for passing wind in a horizontal direction; and a cooling fan, which drives the air flow from the air inlet to the exhaust outlet through the air duct.

As a preferred embodiment, the side portion of the air passage cavity is also provided with a first air inlet and a second air inlet opposite to each other along a horizontal second direction perpendicular to the first direction; the heat exchange part It is a heat exchange fin extending in the vertical direction, and the heat exchange fin is inclined relative to both the first direction and the second direction.

As a preferred embodiment, the heat exchange fins are alternately provided with cooling liquid flow channels and air passages along the vertical direction, and each cooling liquid flow channel forms the portion to be cooled; the ends of the two heat exchange fins that intersect each other are close to each other. The main air inlet; the heat exchange device is also provided with a coolant transport member located between the two heat exchange fins and used for transporting coolant.

As a preferred embodiment, the projection of the first air inlet and the second air inlet along the second direction covers the projection of the heat exchange sheet along the second direction; the heat dissipation fan is installed at the air exhaust outlet. and its projection on the horizontal plane along the vertical direction is spaced apart from the two heat exchange fins along the first direction.

As a preferred embodiment, the cooling liquid flow channels of the two heat exchange fins are connected in parallel through the cooling liquid delivery member.

As a preferred embodiment, it also includes a heating component; the cabinet is also provided with a relatively closed and independent protective cavity below the wind cavity; the heat exchange device is also provided with a liquid cooling plate for dissipating heat from the heating component; The liquid inlet and outlet of the liquid cooling plate are connected to the two heat exchange fins through the cooling liquid transport member.

As a preferred embodiment, it also includes an air heat exchanger; the cabinet is also provided with an air outlet connecting the protection cavity and the air passage cavity; the air outlet is away from the main air inlet; the cabinet is provided along the A first side wall and a second side wall are arranged parallel and opposite to each other in the first direction, the main air inlet is provided on the first side wall, the air exhaust outlet is close to the second side wall, and the protective cavity is on the first side wall. A third air inlet is provided on the two side walls; the air heat exchanger is provided with a first air flow channel and a second air flow channel, the first air flow channel is connected to the third air inlet and the air outlet, and the second air heat exchanger is provided with a first air flow channel and a second air flow channel. The air flow channel is provided with a cold air outlet that delivers cold air to the protection cavity and a hot air outlet that recovers hot air from the protection cavity; the first air flow channel and the second air flow channel exchange heat with each other to take away heat from the second air flow channel.

As a preferred embodiment, it also includes an electrical component, the electrical component includes a reactor extending in the vertical direction; the bottom of the cabinet is also provided with a heat dissipation cavity, and the upper end of the heat dissipation cavity is provided with a reactor on the first side wall. A first air inlet. The lower end of the heat dissipation cavity is provided with a first air outlet on the second side wall. The first air outlet is away from the third air inlet. The first air inlet and the first air outlet are connected. A first air duct is formed; the reactor is placed in the first air duct.

As a preferred embodiment, it also includes a cover body; the cabinet body is provided with a partition plate, the upper surface and the lower surface of the partition plate form the cavity walls of the protective cavity and the heat dissipation cavity respectively; the cover body covers the device The first air duct is formed outside the reactor and connected with the first air inlet and the first air outlet; there is a heat insulation gap between the cover body and the partition plate.

As a preferred embodiment, the heating component includes a high-heating component and a low-heating component, the liquid cooling plate is used to dissipate heat for the high-heating component, and the air heat exchanger is used to dissipate heat for the low-heating component; the separation The plate enables the heat dissipation cavity to form a connected first area and a second area along the air inlet direction, the first area is higher than the second area, and the reactor module is placed in the first area; the dividing plate also allows The protective cavity forms a connected third area and a fourth area along the air inlet direction. The third area and the fourth area are located above the first area and the second area respectively, and the high heating element is located above the fourth area. .

From the above description of the present invention and its preferred embodiments, it can be seen that compared with the existing technology, the technical solution of the present invention and its preferred embodiments have the following beneficial effects by adopting the following technical means:

The applicant has found out through continuous observation, experiments and research that in the existing technical solution, the technical problem of "heat island effect between power cabinets" is caused by the fact that the air outlet of the upstream power cabinet faces the air inlet of the downstream power cabinet. This technology In the plan, the main air inlet is located on the side of the air cavity, and the exhaust outlet is located on the top of the air cavity. The hot air density is small, so the hot air discharged from the top of the air cavity mainly flows upward instead of downward, thus This avoids heat flow disturbance to the main air intake of the downstream power cabinet. On this basis, when a heat exchange device is placed in the wind cavity, in a conventional heat exchange device, the two heat exchange parts are V-shaped and open upward, and the fan is placed above the area between the two heat exchange parts. The heat exchange part is inclined relative to the vertical direction, and the air duct in the heat exchange part is also inclined relative to the vertical direction. After the fan is operated, the direction of air flow changes after passing through the air duct, and the air flow of the two heat exchange parts is opposite between the two. Blow, so sand is easy to accumulate in the inner and outer angles of the bottoms of the two heat exchange parts and the air ducts in the heat exchange parts under the action of gravity and wind flow. After long-term operation, the wind resistance is large, which greatly affects the exchange rate. Thermal efficiency; in this plan, the problem of sand accumulation in the heat exchange part is improved on the basis that the air outlet is located on the top of the cabinet. Specifically, the two heat exchange parts are arranged at an angle, and they are arranged at an angle along the first direction. One end of the air duct intersects with each other, and the other end is far away from each other to form an opening. Each air duct is suitable for passing wind in the horizontal direction. Therefore, the direction of movement of the wind flow is basically unchanged when blowing through the air duct. The resistance in the air duct is small. From the main air inlet The introduced air flow can directly blow away the accumulated sand in the air duct. Since the opening formed by the angle between the two heat exchange parts is oriented horizontally, sand is not easily accumulated at the angle between the two heat exchange parts. At the same time, the air duct is Cool the part to be cooled. In addition, the two heat exchange parts are arranged at an angle, so that both heat exchange parts have a large air passing area and are small in size. It can be seen that this technical solution will not cause any damage to the downstream when multiple power cabinets are arranged side by side along the first direction. The main air inlet of the power cabinet generates heat flow disturbance, which also avoids the problem of sand accumulation in the heat exchange part when the air is discharged from the top, thereby improving the problem of heat exchange efficiency decline after long-term operation of the heat exchange device.

In related technical solutions and preferred embodiments thereof, the arrangement of the first air inlet and the second air inlet facilitates faster removal of heat from the coolant flow channels of the two heat exchange fins, thus improving the heat exchange of the heat exchange fins. efficiency. When multiple power cabinets are paralleled in the second direction, only the first and second outermost air intakes can receive air. Due to the limitation of wind pressure in the air cavity of the power cabinet in the middle, the first and second air inlets will not allow air to enter.

In related technical solutions and preferred embodiments thereof, placing the coolant transport member of the heat exchange device in the area between the two heat exchange fins not only fully utilizes the space between the two heat exchange fins, but also makes it possible to use only two heat exchange fins. The open end of each heat exchanger fin is used to maintain the coolant delivery parts. Since the end of the two heat exchanger fins that are close to each other is close to the main air inlet, the air flow first dissipates heat to the heat exchanger fins and then to the liquid cooling delivery parts, thereby ensuring The heat dissipation efficiency of the heat exchanger fins also realizes the heat dissipation of the liquid cooling conveying parts.

In related technical solutions and preferred embodiments thereof, the projection of the first air inlet and the second air inlet along the second direction covers the projection of the heat exchanger along the second direction, further increasing the air inlet volume of the heat exchanger; heat dissipation The fan is installed at the air outlet and the projection of the cooling fan in the vertical direction is spaced apart from the two heat exchange fins along the first direction, ensuring that the air flow completely flows through the air passage of the heat exchange fins.

In the related technical solution and its preferred embodiment, since the cooling liquid flow channels of the two heat exchange fins are connected in parallel through the cooling liquid transport member, that is, the liquid inlet of each heat exchange fin is filled with the hottest liquid just coming out of the liquid cooling plate. (The temperature difference between the liquid inside the heat exchanger and the outside cold air is the largest, and the heat exchange effect is the best). At the same time, only half of the total system flow is on each heat exchanger, which greatly reduces the system flow resistance and not only increases the heat exchange rate of the heat exchanger. efficiency and also reduces system flow resistance.

In related technical solutions and preferred embodiments thereof, the protective chamber is relatively independent and airtight, which means that the protective chamber has a high level of protection (waterproof and dustproof), and also means that the interior of the protective chamber is not structurally connected to other chambers (over-the-counter). The air cavity and the heat dissipation cavity) have a relationship of encroaching on each other, such as the air duct of the heat dissipation cavity extending into the protective cavity, etc. Therefore, there is enough space in the protective cavity for the installation of the heating components, so that the heating components are not easily affected by the thermal radiation of the electrical components, and a layout most conducive to heat dissipation can be formed, thereby improving the heat dissipation efficiency of the heating components. The heating components in the protective cavity can at least partially dissipate heat through liquid cooling. Compared with the air cooling method, the liquid cooling method is easier to control, has high heat dissipation efficiency, and is conducive to the formation of a relatively airtight structure in the protective cavity, thereby improving the safety of the protective cavity. Protective.

In the related technical solutions and their preferred embodiments, the heating components in the protective cavity mainly dissipate heat through liquid cooling and air cooling, and the heat dissipation efficiency is high. Since the air heat exchanger and the heat exchange device both dissipate heat through external circulation, it can be well improved. The protective nature of the protective cavity. Therefore, the combined heat dissipation method of liquid cooling and air cooling can maximize the heat dissipation efficiency of the heating components in the protective cavity, and the protective cavity has good protection; it is also convenient for parallel use of power cabinets or side-by-side use in the horizontal direction. Reduce the spacing between power cabinets. The setting of the air outlet allows the hot air in the protective cavity to be discharged to the exhaust outlet through the air outlet, further preventing the main air inlet of the downstream power cabinet from being affected by the heat flow disturbance of the upstream power cabinet; among them, the air outlet is far away from the main air inlet. This prevents the hot air from the protective cavity from interfering with the heat exchange fins.

In related technical solutions and preferred embodiments thereof, a liquid-cooling unit is placed in the air-passing cavity. The liquid-cooling unit may have the risk of leakage. The protective cavity is located between the air-passing cavity and the heat dissipation cavity. Since the protective cavity is relatively independent and airtight , so that the protective cavity completely separates the wind cavity and the heat dissipation cavity. Therefore, the relatively closed protective cavity improves its own protection on the one hand and avoids leakage in the wind cavity from leaking into the protective cavity. On the other hand, it also serves as a The compartment prevents leakage from leaking into the heat dissipation cavity, thus preventing damage to electrical components. As for the leakage problem of the liquid cooling unit and the liquid cooling plate pipeline, the protective improvement of the connecting pipe can be made, which is not within the scope of this application. The leakage problem of the liquid cooling unit discussed in this application is mainly aimed at the liquid cooling unit. Liquid leakage problem in the part of the cooling unit in the air passage cavity. The reactor is placed in the first air duct of the heat dissipation cavity. On the one hand, because the reactor is heavier, it has better load-bearing capacity when placed at the bottom of the cabinet. On the other hand, the first air inlet is away from the ground and the first air outlet is closer to the ground. , thus preventing the air flow entering the first air duct from being hot air when the ground temperature is high, and ensuring that the air flow entering the first air duct is cold air far away from the ground. The heat dissipation efficiency of the reactor is high, and at the same time, the low first air outlet makes the second When the hot air from the first air outlet moves upward, the movement trajectory is basically parabolic. This prevents the hot air from entering the third air inlet and affecting the heat dissipation of the protective cavity. It also makes it difficult to align multiple power cabinets when they are used side by side along the first horizontal direction. The air inlet of the adjacent power cabinet downstream has an impact, and because the reactor is placed in an independent first air duct, the heat is relatively concentrated, so that the cold air entering the first air duct from the first air inlet can completely pass through the reactor from top to bottom. The heat dissipation efficiency of the reactor is high. After this setting, the hot air of the entire power cabinet is discharged from the exhaust port at the top and the first air outlet at the bottom, and it is not easy to affect the air inlet of the downstream power cabinet. Generate spoilers.

In related technical solutions and preferred embodiments thereof, there is a thermal insulation gap between the cover body and the partition plate. The thermal insulation gap reduces the heat conduction efficiency between the cover body and the partition plate, thereby preventing the heat of the reactor from being radiated. Dispersed into the protective cavity, the heat dissipation efficiency of the entire cabinet is improved.

In the related technical solution and its preferred embodiment, the high-heating components are placed in the fourth area, and the reactor is placed in the first area, and are arranged basically diagonally with the high-heating components, so that the two electrical components that generate large amounts of heat are as far away as possible. The heat dissipation efficiency is further improved. High-heat-generating parts dissipate heat through liquid cooling, which has high heat dissipation efficiency. Low-heat-generating parts dissipate heat through air cooling, which has high heat dissipation efficiency.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments are briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the field, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a power cabinet according to an embodiment of the present invention;

Figure 2 is a schematic diagram two of the power cabinet according to the embodiment of the present invention;

Figure 3 is a top view of the power cabinet according to the embodiment of the present invention after the cabinet top plate is hidden;

Figure 4 is a schematic diagram of the power cabinet with the cabinet top plate hidden according to the embodiment of the present invention;

Figure 5 is a schematic diagram of the air-to-liquid heat exchanger of the power cabinet according to the embodiment of the present invention;

Figure 6 is an internal schematic diagram of the power cabinet according to the embodiment of the present invention;

Figure 7 is an internal schematic diagram of the hidden part of the cover of the power cabinet according to the embodiment of the present invention.

Explanation of main reference symbols:

Cabinet 10; air passage chamber 10A; air exhaust outlet 101; protective chamber 10B; heat dissipation chamber 10C; upper air outlet chamber 10D; lower air outlet chamber 10F; first air duct 01; second air duct 02; first side wall 11; main air inlet 111; first air inlet 112; second air inlet 113; second side wall 12; first air outlet 121; second air outlet 122; third air inlet 123; first abutting wall 13; The first air inlet 131; the third air outlet 132; the second abutment wall 14; the second air inlet 141; the fourth air outlet 142; the support plate 15; the air outlet 151; the partition plate 16; the air guide surface 161 ; Inner partition 17; Air flow port 171; Cover body 18; Fan module 19; First fan 191; Second fan 192; Insulation gap 03; Heat exchange device 20; Air-to-liquid heat exchanger 21; Heat exchange fins 211; Liquid cooling tube 2111; heat dissipation teeth 2112; liquid cooling plate 22; coolant transport part 23; cooling fan 30; high heating parts 40; low heating parts 50; DC electrical parts 51; capacitor module 52; heat dissipation surface 521; AC electrical Part 53; air heat exchanger 60; cold air outlet 61; hot air outlet 62; reactor 70; electrical connector 80; fuse 81; first connector 82; second connector 83.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is evident that the described embodiments are preferred embodiments of the invention and should not be regarded as exclusive of 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 fall within the scope of protection of the present invention.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third" are used to distinguish different objects and are not used for Describe a specific sequence.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "center", "horizontal", "vertical", "horizontal", "vertical" and "top" are used for directional terms. , "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and other directions or The positional relationships are based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. , therefore it cannot be understood as limiting the specific protection scope of the present invention.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, there is no displacement relationship or relative rotation relationship between the two. Any connection method, that is to say, including non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or components.

In the claims, description and above-mentioned drawings of the present invention, if the terms "include", "have" and their variations are used, the intention is to "include but not be limited to".

Referring to Figures 1-7, Figures 1-7 show a power cabinet, including a cabinet 10, a heat exchange device 20, a cooling fan 30, an air heat exchanger 60, a reactor 70 and an electrical connector 80.

Referring to Figures 1-4, the cabinet 10 is in the shape of a rectangular parallelepiped. The cabinet 10 is provided with a first side wall 11 and a second side wall 12 that are parallel and opposite to each other along a first direction. The cabinet 10 is formed along a third side wall perpendicular to the first direction. The first abutment wall 13 and the second abutment wall 14 are arranged parallel and opposite to each other in two directions. The first direction is the up-down direction in FIG. 3 , and the second direction is the left-right direction in FIG. 3 .

In this embodiment, the cabinet 10 is provided with a support plate 15 and a partition plate 16. See Figures 6-7. The support plate 15 divides the cabinet 10 into an upper area and a lower area. The upper area forms an air passage 10A. The partition plate 16. The lower area is divided into a middle area and a bottom area. The middle area forms a protective cavity 10B, and the bottom area forms a heat dissipation cavity 10C. That is, the top of the cabinet 10 is provided with an airflow cavity 10A, and the bottom is provided with a heat dissipation cavity 10C. A protective cavity 10B is provided between the air cavity 10A and the heat dissipation cavity 10C, and the protective cavity 10B is relatively sealed. Among them, the support plate 15 extends in the horizontal direction, and the partition plate 16 is Z-shaped as a whole. The partition plate 16 is formed by two horizontal sections and a vertical section, and the vertical section connects the two horizontal sections to form a Z-shaped partition plate.

In this embodiment, since the projection of the partition plate 16 along the second direction is Z-shaped, the partition plate 16 causes the heat dissipation cavity 10C to form a connected first area (left side in Figure 7) and a second area (left side in Figure 7) along the air inlet direction. The right side in Figure 7), the first area is higher than the second area, and the partition plate 16 also allows the protective cavity 10B to form a connected third area (left side in Figure 7) and a fourth area (the left side in Figure 7) along the air inlet direction. on the right), with the third and fourth zones located above the first and second zones respectively. It should be understood that both the support plate 15 and the partition plate 16 should be sealingly connected to the side panels of the cabinet 10, so that the protective chamber 10B is relatively independent and sealed. The relatively independent and sealed protective chamber 10B means that the protective chamber 10B has higher protection. level (waterproof and dustproof), also means that the interior of the protective cavity 10B does not have a mutually intrusive relationship with other chambers (wind cavity and heat dissipation cavity) in structure, such as the air duct of the heat dissipation cavity 10C extending into the protective cavity, etc. . Therefore, there is enough space in the protective cavity 10B for the installation of the heating components below, so that the heating components are not easily affected by the thermal radiation of the electrical components, and can form a layout that is most conducive to heat dissipation, thereby improving the heat dissipation efficiency of the heating components.

Referring to Figure 1-2, the air passage cavity 10A has a main air inlet 111 on the first side wall 11 along the first horizontal direction, and an air outlet 101 is provided on the top. The air outlet 101 is close to the second side wall 12; The cavity 10A is also provided with a first air inlet 131 and a second air inlet 141 on the first abutment wall 13 and the second abutment wall 14 respectively, that is, the side of the air cavity 10A is also along the second horizontal direction. A first air inlet 131 and a second air inlet 141 are arranged opposite to each other.

Referring to FIG. 2 , the protective cavity 10B has a third air inlet 123 on the second side wall 12 . Referring to Figures 6-7, the cabinet 10 is also provided with an air outlet 151 that connects the protective cavity 10B and the air passage cavity 10A. The air outlet 151 is away from the main air inlet 111 and close to the second side wall 12. In this embodiment, the air outlet 151 Opened on the support plate 15.

Referring to Figure 7, the heat dissipation cavity 10C is provided with a first air inlet 112 and a second air inlet 113 on the first side wall 11, and is provided with a first air outlet 121 and a second air outlet 122 on the second side wall 12; An air inlet 112 and a first air outlet 121 are connected to form a first air duct 01 , and a second air inlet 113 and a second air outlet 122 are connected to form a second air duct 02 .

Specifically, referring to FIGS. 6-7 , the heat dissipation cavity 10C is provided with an inner partition 17 between the first air outlet 121 and the second air outlet 122 to separate the heat dissipation cavity 10C from the first air inlet 112 and the second air outlet 122 . The upper air outlet chamber 10D corresponding to the air inlet 113 and the second air outlet 122 and the lower air outlet chamber 10F corresponding to the first air outlet 121; the inner partition 17 is provided with a connecting first air inlet 112 and the first air outlet 121. The air flow port 171, the first air inlet 112 and the air flow port 171 form a part of the first air duct 01, the air flow port 171 and the first air outlet 121 form another part of the first air duct 01; the upper air outlet chamber The part outside the first air duct 01 in 10D forms the second air duct 02. Therefore, the first air duct 01 is partially located in the second air duct 02 . Referring to FIGS. 1-2 , the lower air outlet chamber 10F also forms third air outlets 132 and fourth air outlets 142 on the first abutment wall 13 and the second abutment wall 14 that communicate with the air flow outlet 171 .

In this embodiment, the cabinet 10 is provided with a cover 18. One end of the cover 18 is connected to the first air inlet 112, and the other end is connected to the air outlet 171 to form a part of the first air duct 01. The projection of the cover body 18 along the second direction is L-shaped and is provided with horizontal sections and vertical sections.

In the preferred embodiment, the cover 18 is located in the first area of the heat dissipation cavity 10C, and an airflow gap is formed between the cover 18 and the first abutment wall 13 and the second abutment wall 14; the heat dissipation cavity 10C is away from the second side The inner surface of the wall 12 is provided with an air guide surface 161 facing the cover body 18 and parallel to the first side wall 11 . A wind gap is formed between the air guide surface 161 and the cover body 18 and vertically connected to the inner partition 17 . directions are spaced apart. There is a heat insulation gap 03 between the top surface of the cover body 18 and the cavity wall of the heat dissipation cavity 10C. The wind gap between the cover body 18 and the air guide surface 161 can also realize the heat insulation function and is also the heat insulation gap 03 . In this embodiment, the surface of the vertical section of the partition plate 16 facing the first side wall 11 forms the air guide surface 161 .

Still referring to Figure 7, the first air inlet 112 and the first air outlet 121 are respectively located at the upper end and the lower end of the heat dissipation cavity 10C, and the second air inlet 113 and the second air outlet 122 are both located at the first air inlet 112 and the first air outlet 121. between them, and the second air inlet 113 is higher than the second air outlet 122 .

Specifically, in this embodiment, the cabinet 10 includes a fan module 19 corresponding to the heat dissipation cavity 10C; the fan module 19 is installed on the first side wall 11 and is used to supply air to the first air inlet 112 and the second air inlet 113 , and the air supply volume to the first air inlet 112 is greater than the air supply volume to the second air inlet 113 . In this embodiment, the fan module 19 includes a first fan 191 opposite the first air inlet 112 and a second fan 192 opposite the second air inlet 113. Both the first fan 191 and the second fan 192 are air supply fans. The power of the first fan 191 is greater than the power of the second fan 192 . The fan module 19 is installed on the first side wall 11. Compared with being installed on the second side wall 12, the temperature of the fan module 19 is not very high, so that the fan is less likely to be damaged.

The heat exchange device 20 is at least partially placed in the air passage chamber 10A. Specifically, see FIG. 6 . The heat exchange device 20 includes an air-to-liquid heat exchanger 21 placed in the air passage chamber 10A and an air-to-liquid heat exchanger 21 placed in the protective chamber 10B. The liquid-cooled plate 22 dissipates heat from the high-heat-generating parts 40. The air-to-liquid heat exchanger 21 is connected with the liquid inlet and outlet of the liquid-cooled plate 22, thereby delivering cold liquid to the liquid-cooled plate 22 and recovering hot liquid from the liquid-cooled plate. Realize liquid cooling cycle. Referring to Figure 4-5, the air-to-liquid heat exchanger 21 is provided with two heat exchange parts located in the wind cavity 10A; the two heat exchange parts are arranged at an angle, and one end of them intersects with each other along the first direction, and the other end Openings are formed away from each other; the heat exchange part is provided with a part to be cooled and a number of air passages, each of which is suitable for passing wind in the horizontal direction. Specifically, the heat exchange part is a heat exchange fin 211 extending in the vertical direction. , the heat exchange fins 211 are inclined relative to both the first direction and the second direction, the two heat exchange fins 211 are combined into a V shape, the V-shaped opening faces the second side wall 12, and the intersecting ends of the two heat exchange fins 211 are close to the main The air inlets 111 and the heat exchange fins 211 extend in the vertical direction and are alternately provided with coolant flow channels and air passages along the vertical direction. Each coolant flow channel forms a portion to be cooled, and the coolant flow channels are along the edges of the heat exchange fins 211. Extending in the length direction, the air duct is suitable for passing wind in the horizontal direction; in Figure 5, the cooling liquid flow channel is formed by a liquid cooling tube 2111 extending along the length direction of the heat exchange fin 211, and there are zigzag heat dissipation fins in the air duct. 2112 to increase the heat dissipation efficiency; still referring to FIG. 4 , the projection of the first air inlet 131 and the second air inlet 141 along the second direction covers the projection of the heat exchange fin 211 along the second direction. It should be understood that in addition to the air-to-liquid heat exchanger 21 and the liquid cooling plate 22, the heat exchange device 20 also includes other components such as a coolant transport member 23, etc. The coolant transport member 23 may be a pump, a water tank, a pipeline and other waterway components. This part belongs to the prior art and will not be described again in this embodiment. Since the intersecting ends of the two heat exchange fins 211 are close to the main air inlet 111, when the coolant transport member 23 of the heat exchange device 20 is placed in the area between the two heat exchange fins 211, not only the two heat exchangers are fully utilized, but The space between the fins 211 also makes it possible to maintain the coolant transport member 23 only at the open ends of the two heat exchange fins 211, and because the air flow first dissipates heat to the heat exchange fins 211 and then to the coolant transport member 23, The heat dissipation efficiency of the heat exchanger 211 is ensured. The heat exchange fins 211 are inclined relative to both the first direction and the second direction, ensuring that each heat exchange fin 211 has a large airflow area and a small volume.

In this embodiment, the coolant flow channels of the two heat exchange fins 211 are connected in parallel through the coolant transport member 23, that is, the liquid inlet of each heat exchange fin 211 is filled with the hottest liquid (exchanger) just coming out of the liquid cooling plate 22. The temperature difference between the liquid inside the heat exchanger 211 and the outside cold air is the largest, and the heat exchange effect is the best). At the same time, only half of the total system flow is on each heat exchanger 211, which greatly reduces the system flow resistance and not only increases the heat exchanger 211 The heat exchange efficiency also reduces the system flow resistance.

The cooling fan 30 is placed at the air outlet 101 to drive the air flow from the air inlet 111 to the air outlet 101 through the air duct. The projection of the cooling fan 30 in the vertical direction is spaced apart from the two heat exchange fins 211 along the first direction, ensuring that the air flow completely flows through the air passage of the heat exchange fins 211. It should be understood that in this embodiment, the cooling fan 30 is an exhaust fan and should have a high protection level.

In this embodiment, the main air inlet 111 is located at the side of the air cavity 10A, and the air exhaust outlet 101 is located at the top of the air cavity 10A. The hot air density is small, so the hot air flow discharged from the top of the air cavity 10A mainly flows upward, and It will not flow downward, thereby avoiding heat flow disturbance to the main air inlet 111 of the downstream power cabinet. On this basis, when the heat exchange device 20 is placed in the wind cavity 10A, the two heat exchange fins of the conventional heat exchange device 20 are inclined relative to the vertical direction, and the fan is placed in the area between the two heat exchange fins. Above, during the operation of the fan, the direction of air flow changes after passing through the heat exchanger. Since the liquid cooling tube in the heat exchanger extends along its length, when the heat exchanger is tilted relative to the vertical direction, the heat exchanger The air duct is also tilted relative to the vertical direction. After the fan is operated, the direction of air flow changes after passing through the air duct. The air flow of the two heat exchange parts blows against each other, so the sand is easily moved under the action of gravity and wind flow. Sand accumulates in the inner and outer angles of the bottoms of the two heat exchange parts and in the air ducts in the heat exchange parts. After long-term operation, the wind resistance is large, which greatly affects the heat exchange efficiency. In this embodiment, the air outlet is correspondingly 101 is located on the top of the cabinet 10, and the problem of sand accumulation in the heat exchange fins 211 has been improved. Specifically, the two heat exchange parts are arranged at an angle, one end of which intersects with each other along the first direction, and the other end is far away from each other. An opening is formed, and the air passage of the heat exchanger 211 passes the wind in the horizontal direction. Therefore, the resistance in the air passage is small, and the air flow introduced from the main air inlet 111 can directly blow away the air passage and the accumulated sand in the air passage. Since The opening formed by the angle between the two heat exchange parts is oriented horizontally, making it difficult for wind and sand to accumulate at the angle between the two heat exchange parts. At the same time, the air passage and the coolant flow passage are allowed to exchange heat. That is to say, in this embodiment, when multiple power cabinets are arranged side by side along the first direction, heat flow will not occur to the main air inlet 111 of the downstream power cabinet, and it will also avoid the heat exchange fins 211 easily accumulating sand when the air is discharged from the top. problem, thereby improving the problem of reduced heat exchange efficiency after long-term operation of the heat exchange device.

In this embodiment, the arrangement of the first air inlet 131 and the second air inlet 141 facilitates faster removal of heat from the coolant flow channels of the two heat exchange fins 211, thus improving the heat exchange efficiency of the heat exchange fins 211. . The side walls of the cabinet 10 other than the first side wall 11 and the second side wall 12, that is, the first abutment wall 13 and the second abutment wall 14 do not require air inlet or outlet, and do not require maintenance, so this side wall can be used to communicate with other Combining cabinets 10 will not affect the work, heat dissipation and maintenance of the power cabinet itself; when multiple power cabinets are paralleled in the second direction, there are only the outermost first air inlet 131 and the second air inlet 141 Can take in the wind. Due to the limitation of wind pressure, the first air inlet 131 and the second air inlet 141 of the wind cavity 10A of the power cabinet in the middle will not allow air to enter.

Still referring to Figures 6-7, the heating component is placed in the protective cavity 10B and includes a high heating component 40 and a low heating component 50; the high heating component 40 is dissipated by the liquid cooling plate 22, and the high heating component 40 is an inverter in this embodiment. module, so the water pipe of the air-liquid heat exchanger 21 also penetrates the support plate 15 and is connected to the liquid cooling plate 22; the low-heating component 50 includes a DC electrical component 51, an AC electrical component 53 and a capacitor module 52, and the DC electrical component 51 is close to the first The side wall 11 and the AC electrical component 53 are placed at the bottom of the protection cavity 10B near the second side wall 12 and located below the air heat exchanger 60; the capacitor module 52 is located between the DC electrical component 51 and the AC electrical component 53 and is located between the high-heating Piece 40 below. The lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction.

Among them, the high heating element 40 is located above the fourth area. The DC electrical component 51 is placed in the third area, the AC electrical component 53 is placed in the fourth area, and the capacitor module 52 spans the third area and the fourth area and is located vertically between the AC electrical component 53 and the high heat-generating component 40 . The electrical connection relationship in the protective cavity 10B is that the DC electrical component 51 is connected to the capacitor module 52 , the capacitor module 52 is connected to the high-heat-generating component 40 , and the high-heat-generating component 40 is connected to the AC electrical component 53 .

In this embodiment, the air-to-liquid heat exchanger 21 of the heat exchange device 20 is placed in the air cavity 10A at the top, so the air inlet of the heat exchange device 20 is also located at the top. The air inlet is far away from the ground and has a lower air inlet temperature. , so that the heat dissipation efficiency of the air-to-liquid heat exchanger 21 is high, thereby ensuring that the high-heating component 40 has a high heat dissipation efficiency; since the air-to-liquid heat exchanger 21 has no concerns about water ingress, the air outlet can be opened on the top of the cabinet 10. Therefore, when multiple power cabinets are used in parallel, it is not easy to cause heat flow disturbance to the downstream power cabinets; since the air-to-liquid heat exchanger 21 is placed on the top, the sides of the cabinet 10 are not occupied, which facilitates the parallel operation or operation of multiple power cabinets. Side-by-side use in horizontal orientation.

The air heat exchanger 60 is installed on the inner surface of the second side wall 12; the air heat exchanger 60 is provided with a cold air outlet 61 that delivers cold air to the protective cavity 10B and a hot air outlet 62 that recovers hot air from the protective cavity 10B; wherein, the hot air outlet 62 and the cold air outlet 61 are both facing the first side wall 11, and the hot air outlet 62 is higher than the cold air outlet 61. In practical applications, the hot air outlet 62 is also equipped with an exhaust fan. The axis of the exhaust fan is parallel to the first direction, and the air heat exchange The device 60 is provided with a first airflow channel and a second airflow channel. The first airflow channel is connected to the third air inlet 123 and the air outlet 151. The second airflow channel is provided with a cold air outlet 61 and a hot air outlet 62; the cooling fan 30 also drives the air from The third air inlet 123 flows to the air outlet 101 through the air outlet 151; the first air flow channel and the second air flow channel exchange heat with each other to take away the heat of the second air flow channel. The hot air outlet 62 is higher than the cold air outlet 61. The cold air from the air heat exchanger 60 can gradually take away the heat of the heating components in the protective cavity 10B while flowing upward in the protective cavity 10B, and the air flow circulation is good. The air heat exchanger 60 is installed on the inner surface of the second side wall 12, which is more beautiful than being installed on the outer surface of the second side wall 12. If the air heat exchanger 60 is installed on the outer surface of the second side wall 12, On the surface, the hot air from the first air flow channel easily flows into the main air inlet 111 of the downstream cabinet 10 .

In this embodiment, the air heat exchanger 60 and the air-to-liquid heat exchanger 21 share the cooling fan 30 and thus the air exhaust port 101, so that the hot air generated by the protective cavity 10B is discharged from the air exhaust port 101 on the top of the cabinet 10, thereby When multiple power cabinets are used side by side along the first direction, the hot air from the air outlet 101 of the upstream power cabinet will not affect the main air inlet 111 of the downstream power cabinet.

Among them, the high-heating component 40 is close to the hot air outlet 62 of the air heat exchanger 60, so the cold air flow flowing out of the cold air port 61 of the air heat exchanger 60 can first take away the heat of the low-heating component 50 in the protective cavity 10B, and then take away the high-heating component 40. The heat of the heating element 40 is thus ensured with low heat dissipation efficiency of the heating element 50 . The high-heating part 40 is lower than the hot air outlet 62, so the resistance of the hot air when it returns is small, and because the density of the hot air in the air flow is smaller than that of the air, when it passes through the high-heating part 40 when it returns, the cold air is at the bottom and the hot air is at the top, making the air heat exchanger 60 can dissipate heat for the low-heat-generating component 50 and also dissipate heat for the high-heat-generating component 40 .

The capacitor module 52 generates the largest amount of heat among the low-heat-generating components 50. The capacitor module 52 is located between the DC electrical component 51 and the AC electrical component 53 and below the high-heat-generating component 40, which is convenient for routing, and the cold air from the air heat exchanger 60 passes through the AC The electrical component 53, the capacitor module 52, and the DC electrical component 51 flow through the high-heating component 40 and are recycled to the hot air outlet 62. Since the heat generated by the AC electrical component 53 is small, the temperature of the cold air is still low after passing through the AC electrical component 53, so that it can The heat of the capacitor module 52 is well taken away, and since the DC electrical component 51 is close to the first side wall 11 , the heat of the DC electrical component 51 can be radiated outward through the first side wall 11 , so that the heat dissipation efficiency of the low heat-generating component 50 is high.

In this embodiment, the lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction, which not only facilitates the electrical coupling between the upper surface of the capacitor module 52 and the high-heating component 40 , but also allows the cold air to better circulate the capacitor module 52 heat dissipation. An airflow gap is formed between the liquid cooling plate 22 and the upper surface of the capacitor module 52 , and the airflow speed in the airflow gap is the fastest, so that the cold air can take away the heat of the capacitor module 52 and the high-heat-generating component 40 at the same time. It can be seen that the capacitor module 52 is arranged basically horizontally, so the air flow can flow around the entire capacitor module 52 , the heat dissipation efficiency of the capacitor module 52 is relatively high, and the capacitor module 52 can also guide the air flow to the cold air outlet 61 away from the air heat exchanger 60 The DC electrical component 51 thus improves the heat dissipation efficiency of the DC electrical component 51 .

In this embodiment, the electrical components in the protective cavity 10B mainly dissipate heat through liquid cooling and air cooling. Among them, the high-heat-generating components 40 dissipate heat through liquid cooling. The liquid-cooling heat dissipation method has high heat dissipation efficiency, and the low-heat-generating components 50 use air cooling. Heat dissipation, since both the air heat exchanger 60 and the air-liquid heat exchanger 21 dissipate heat through external circulation, the protection of the protective cavity 10B can be greatly improved; the high-heating part 40 is close to the hot air outlet 62 of the air heat exchanger 60, so the air The cold airflow flowing out of the cold air outlet 61 of the heat exchanger 60 can first take away the heat of the low-heat-generating components 50 in the protective cavity 10B, and then take away the heat of the high-heat-generating components 40, thereby ensuring the heat dissipation efficiency of the low-heat-generating components 50. Among them, the combined heat dissipation method of liquid cooling and air cooling can maximize the heat dissipation efficiency of the heating components in the protective cavity 10B, and the protective cavity 10B has good protection.

Referring to Figure 7, the electrical component includes a reactor 70 and an electrical connector 80. The reactor 70 extends in the vertical direction and is placed in the first air duct 01. The reactor 70 is located in the upper air outlet chamber 10D and is mainly placed in the hood. In the vertical section of the body 18, a wind gap is formed between the reactor 70 and the vertical section of the cover body 18. The "wind gap" should be understood as being only used for wind, and no other heating devices can be placed in the wind gap. parts, the horizontal section of the cover body 18 is only used for passing the wind. That is, the reactor 70 is placed in the first area. The reactor 70 is placed in the first air duct 01 of the heat dissipation cavity 10C. On the one hand, the reactor 70 is heavier and has better load-bearing capacity when placed at the bottom of the cabinet 10. On the other hand, it also makes the first air duct 01 pass from the first air duct 01. The hot air discharged from the first air outlet 121 is as far away from the third air inlet 123 as possible, and the movement trajectory of the hot air from the first air outlet 121 is parabolic, thereby preventing the hot air generated by the reactor 70 from disturbing the cold air from the third air inlet 123 . The reactor 70 is located in the upper air outlet chamber 10D, so that the reactor 70 is separated from the ground by the lower air outlet chamber 10F, thus preventing the reactor 70 from being affected by the heat radiation of the ground.

Since the air gap is formed between the cover body 18 and the first abutment wall 13 and the second abutment wall 14, it is beneficial for the cold air flow from the second air inlet 113 to pass through the cover body 18, so that the air flow velocity increases, and the cold air flow is After flowing to the air guide surface 161, it collides with the air guide surface 161, and the flow speed further increases. The air flow that collides with the air guide surface 161 flows downward along the outside of the cover body 18, thereby taking away the heat radiation of the reactor 70 to the cover body 18. The heat dissipation efficiency of the reactor 70 is further improved; since the air guide surface 161 is vertically spaced from the inner partition 17 , the air flow that does not collide with the air guide surface 161 continues to flow to the second air outlet 122 .

There is a heat insulation gap 03 between the top surface of the cover body 18 and the cavity wall of the heat dissipation cavity 10C. This heat insulation gap 03 cooperates with the wind gap between the cover body 18 and the air guide surface 161 to reduce the size of the cover body 18 The heat conduction efficiency between the reactor 70 and the partition plate 16 prevents the heat of the reactor 70 from dissipating into the protection cavity 10B through radiation, further avoiding the impact on the electrical components in the protection cavity 10B. The heat dissipation efficiency of the entire cabinet 10 is improved, making it difficult for the heat of the reactor 70 to be transferred upward through thermal radiation.

The electrical connector 80 is at least partially located in the second air duct 02 . The electrical connector 80 includes a fuse 81 , a first connector 82 and a second connector 83 . The fuse 81 is used for electrical coupling with the DC electrical component 51 , the first connector 82 is a DC electrical connector, and the second connector 83 It is an AC electrical connector connected to the AC electrical component 53 . Since the heat generated by the fuse 81 is greater than that of the first connector 82 and the second connector 83 , the temperature resistance of the fuse 81 is lower than that of the first connector 82 and the second connector 83 . The fuse 81 and the first connector 82 The second connector 83 is located on one side of the reactor 70 close to the first side wall 11 along the second direction, and the second connector 83 is located on the other side of the reactor 70 close to the second side wall 12 along the second direction, which is beneficial to the first connector 82 and The wiring operation of the DC electrical component 51 and the wiring operation of the second connector 83 and the AC electrical component 53 as well as the fuse 81 , the first connector 82 and the second connector 83 . The fuse 81 is close to the second air inlet 113 , and the first connector 82 is located below the fuse 81 . The first connector 82 and the second connector 83 extend through the inner partition 17 into the lower air outlet chamber 10F to improve heat dissipation efficiency. Correspondingly, a wiring hole for extending the DC electrical components 51 may be provided at the bottom end of the first side wall 11 , and a wiring hole for extending the AC electrical components 53 may also be provided at the bottom end of the second side wall 12 .

In this embodiment, the reactor 70 is placed in the first air duct 01, and the electrical connector 80 is at least partially located in the second air duct 02. Since the first air inlet 112 and the first air outlet 121 of the first air duct 01 are respectively Located at the upper end and lower end of the heat dissipation cavity 10C, the second air inlet 113 and the second air outlet 122 are located between the first air inlet 112 and the first air outlet 121, and the second air inlet 113 is higher than the second air outlet 122. Therefore, the first air inlet 112 is further away from the ground than the second air inlet 113, and the air inlet temperature of the first air inlet 112 is lower than the temperature of the second air inlet 113, so that the cooler air flow can dissipate heat for the reactor 70. The calorific value of the reactor 70 is greater than the calorific value of the electrical connector 80. Therefore, the temperature of the first air outlet 121 is higher than the temperature of the second air outlet 122. Since the first air outlet 121 is located at the lower end of the heat dissipation cavity 10C, therefore, When multiple power cabinets are used side by side along the first direction, the movement trajectory of the hot air from the first air outlet 121 is basically parabolic when it moves upward. The air inlet 113 has an impact; at the same time, the reactor 70 is placed in a separate first air duct 01. The air flow in the first air duct 01 is greater than the air flow in the second air duct 02, so that the heat of the reactor 70 is relatively concentrated and can be quickly Take away, the heat dissipation efficiency is high, and the heat radiation to the electrical connector 80 is small, so the heat dissipation efficiency of the electrical connector 80 is also high; wherein, the electrical connector 80 is at least partially located in the second air duct 02, and the electrical connector 80 The heat can be dissipated through the second air duct 02, and the heat dissipation efficiency is high. Since the heat generated by the electrical connector 80 is low, the second air duct 02 can also take away the heat of the first air duct 01 during the heat dissipation process, thereby further improving the efficiency of the heat dissipation. The heat dissipation efficiency of the reactor 70. In addition, the reactor 70 and the electrical connector 80 are located in an independent heat dissipation cavity 10C, and the hot air flowing through the reactor 70 and the electrical connector 80 is directly discharged without disturbing other electrical components. It can be seen that in this embodiment, the power cabinet is easy to combine. The reactor 70 and the electrical connector 80 are respectively installed in the first air duct 01 and the second air duct 02. By arranging the first air inlet 112 and the first air outlet 121, At the upper and lower ends of the heat dissipation cavity 10C, the cold air temperature of the reactor 70 is low and the heat dissipation efficiency is high. At the same time, the hot air of the reactor 70, that is, the hot air of the first air outlet 121, is as close to the ground as possible to avoid causing damage to the downstream power cabinet. Influence, with the independent first air duct 01 of the reactor 70, the heat dissipation efficiency of the reactor 70 is greatly improved; placing the electrical connector 80 that generates less heat in the second air duct 02 with less air volume satisfies the requirements of the electrical connector. 80 heat dissipation requirements, the reactor 70 can also be used to assist heat dissipation.

In this embodiment, the lower air outlet chamber 10F also forms a third air outlet 132 and a fourth air outlet 142 on the first abutting wall 13 and the second abutting wall 14 that are connected with the air outlet 151 and the air outlet 171, so that the air flow is In addition to flowing out through the first air outlet 121, the hot air passing through the reactor 70 can also flow out through the third air outlet 132 and the fourth air outlet 142, thereby reducing the amount of hot air in the first air outlet 121 and making it less likely to affect the downstream power. The first air inlet 112 and the second air inlet 113 of the cabinet cause interference; it should be understood that both the first abutment wall 13 and the second abutment wall 14 are suitable for use when combined with other power cabinets. When the cabinets are combined in the second direction to form a power group, only the third air outlet 132 and the fourth air outlet 142 located at the outermost side will discharge air. The third air outlet 132 and the fourth air outlet 142 of the power cabinet located in the middle are adjacent to each other. The wind pressure of the power cabinet is large and the wind will not flow out.

After this arrangement, the hot air of the entire power cabinet is discharged from the air exhaust port 101 at the top and the first air outlet 121 at the bottom, making it less likely to disturb the air inlet of the downstream power cabinet. In this embodiment, the high-heating component 40 is placed in the fourth area, and the reactor 70 is placed in the first area, basically diagonally arranged with the reactor 70, so that the two electrical components that generate large amounts of heat are as far away as possible, further improving the efficiency. Heat dissipation efficiency; and the DC electrical components 51 are placed in the third area, the AC electrical components 53 are placed in the fourth area, and the capacitor module 52 spans the third area and the fourth area, which is also convenient for wiring. A liquid-cooling unit is placed in the air-passing cavity 10A. The liquid-cooling unit may have the risk of leakage. The protective cavity 10B is located between the air-passing cavity 10A and the heat dissipation cavity 10C. Since the protective cavity 10B is relatively independent and airtight, the protective cavity 10B The air-passing chamber 10A and the heat dissipation chamber 10C are completely separated. Therefore, the relatively closed protective chamber 10B improves its own protection on the one hand and prevents leakage in the air-passing chamber 10A from leaking into the protective chamber 10B. On the other hand, it also It serves as a compartment to prevent leakage of liquid from leaking into the heat dissipation cavity 10C, thereby avoiding damage to the electrical components. As for the leakage problem of the pipeline between the liquid cooling unit and the liquid cooling plate 22, the protective improvement of the connecting pipe can be made, which is not within the scope of this application. The leakage problem of the liquid cooling unit discussed in this application is mainly aimed at There is a liquid leakage problem in the part of the liquid cooling unit in the air passage chamber 10A.

The above descriptions of the specification and examples are used to explain the scope of protection of the present invention, but do not constitute a limitation of the scope of protection of the present invention. Through the inspiration of the present invention or the above-mentioned embodiments, a person of ordinary skill in the art can obtain the conclusions about the embodiments of the present invention through logical analysis, reasoning or limited testing based on common sense, common technical knowledge in the field and/or existing technology. Or modifications, equivalent substitutions or other improvements of some of the technical features shall be included in the protection scope of the present invention.

Claims (10)

1. A power cabinet, which is characterized by comprising

The cabinet body (10) is provided with an air passing cavity (10A) at the top, a main air guiding opening (111) is formed in the side part of the air passing cavity (10A) along the horizontal first direction, and an air outlet (101) is formed in the top;

the heat exchange device (20) is provided with two heat exchange parts positioned in the air passing cavity (10A); the two heat exchange parts are arranged at an included angle, one ends of the two heat exchange parts along the first direction are intersected with each other, and the other ends of the two heat exchange parts are far away from each other to form an opening; the heat exchange part is provided with a part to be cooled and a plurality of air passing channels, and each air passing channel is suitable for passing air along the horizontal direction; and

and the heat radiation fan (30) drives the wind flow to be discharged from the main wind guiding opening (111) to the air outlet (101) through the air passage.

2. A power cabinet according to claim 1, characterized in that the side of the air-passing chamber (10A) is further provided with a first air-introducing opening (131) and a second air-introducing opening (141) opposite to each other in a second direction perpendicular to the horizontal direction of the first direction; the heat exchange part is a heat exchange plate (211) extending along the vertical direction, and the heat exchange plate (211) is inclined relative to the first direction and the second direction.

3. A power cabinet according to claim 2, characterized in that the heat exchanger plates (211) are alternately provided with cooling liquid channels and air passages in the vertical direction, each cooling liquid channel forming the portion to be cooled; one end of each heat exchange plate (211) is close to the main air inlet (111); the heat exchange device (20) is also provided with a cooling liquid conveying piece (23) which is positioned between the two heat exchange plates (211) and is used for conveying cooling liquid.

4. A power cabinet according to claim 3, characterized in that the projections of the first (131) and second (141) air introduction openings in the second direction cover the projections of the heat exchanger plates (211) in the second direction; the heat radiation fan (30) is arranged at the air outlet (101) and the projection of the heat radiation fan on the horizontal plane along the vertical direction is spaced from the two heat exchange plates (211) along the first direction.

5. A power cabinet according to claim 4, characterized in that the coolant flow channels of the two heat exchanger plates (211) are connected in parallel via the coolant conveying member (23).

6. A power cabinet as claimed in claim 5, further comprising a heat generating component; the cabinet body (10) is also provided with a relatively airtight and independent protection cavity (10B) below the air passing cavity (10A); the heat exchange device (20) is also provided with a liquid cooling plate (22) for radiating heat of at least part of the heating components; the liquid inlet and the liquid outlet of the liquid cooling plate (22) are communicated with the two heat exchange plates (211) through the cooling liquid conveying piece.

7. A power cabinet according to claim 6, further comprising an air heat exchanger (60); the cabinet body (10) is also provided with an air passing port (151) which is communicated with the protection cavity (10B) and the air passing cavity (10A); the air passing opening (151) is far away from the main air guiding opening (111); the cabinet body (10) is provided with a first side wall (11) and a second side wall (12) which are parallel and opposite to each other along a first direction, the main air guiding opening (111) is arranged on the first side wall (11), the air outlet (101) is close to the second side wall (12), and the protection cavity (10B) is provided with a third air inlet (123) on the second side wall (12); the air heat exchanger (60) is provided with a first air flow passage and a second air flow passage, the first air flow passage is communicated with the third air inlet (123) and the air passing opening (151), and the second air flow passage is provided with a cold air port (61) for conveying cold air to the protection cavity (10B) and a hot air port (62) for recovering hot air from the protection cavity (10B); the first air flow passage and the second air flow passage exchange heat with each other to take away heat of the second air flow passage.

8. A power cabinet according to claim 7, characterized by further comprising an electrical component comprising a reactor (70) extending in a vertical direction; the bottom of the cabinet body (10) is also provided with a heat dissipation cavity (10C), the upper end of the heat dissipation cavity (10C) is provided with a first air inlet (112) at a first side wall (11), the lower end of the heat dissipation cavity (10C) is provided with a first air outlet (121) at a second side wall (12), the first air outlet (121) is far away from a third air inlet (123), and a first air channel (01) is formed by communicating the first air inlet (112) with the first air outlet (121); the reactor (70) is arranged in the first air duct (01).

9. A power cabinet according to claim 8, further comprising a cover (18); the cabinet body (10) is provided with a partition plate (16), and the upper surface and the lower surface of the partition plate (16) respectively form cavity walls of a protection cavity (10B) and a heat dissipation cavity (10C);

the cover body (18) is covered outside the reactor (70) and is communicated with the first air inlet (112) and the first air outlet (121) to form the first air duct (01); a heat insulation gap (03) is reserved between the cover body (18) and the partition plate (16).

10. A power cabinet according to claim 9, wherein the heat generating component comprises a high heat generating element (40) and a low heat generating element (50), and the liquid cooling plate (22) is configured to dissipate heat from the high heat generating element (40); the air heat exchanger (60) is used for radiating heat for the low-heat-generation component (50);

The partition plate (16) enables the heat dissipation cavity (10C) to form a first area and a second area which are communicated along the air inlet direction, the first area is higher than the second area, and the reactor (70) is arranged in the first area;

the separation plate (16) also enables the protection cavity (10B) to form a third area and a fourth area which are communicated along the air inlet direction, the third area and the fourth area are respectively positioned above the first area and the second area, and the high heating piece (40) is positioned above the fourth area.