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 and a reactor. The cabinet body is provided with a relatively closed protective cavity and a cover body, and the cover body is at least partially located in the protective cavity or located below the protective cavity and forms an independent heat dissipation air duct; and the heat dissipation air duct is provided with a third air outlet suitable for upward air outlet on the outer wall of the cabinet body. The electric reactor is located in the heat dissipation air channel so as to dissipate heat by the air flow in the heat dissipation air channel. According to the power cabinet, the reactor independent air duct radiates heat, the heat radiation effect is good, the protection effect in the high protection area of the cabinet is not influenced, and because the third air outlet of the heat radiation air duct discharges air upwards, hot air is not easy to flow downwards to enter the downstream power cabinet after being discharged, and when a plurality of cabinets are used side by side, the heat radiation effect is good. The hot air of the air outlet of the upstream power cabinet does not affect the air inlet of the downstream power cabinet, so that the heat island effect of the power station can be effectively avoided.

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 quantity is bigger, the prior art often sets up relatively independent and sealed protection cavity to contain IGBT power module and capacitor module and so on the component needing high protection, and carries out heat dissipation to high protection component through liquid cooling unit and air cooling heat exchanger, wherein, liquid cooling unit often is placed at the top of cabinet body, and air cooling 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 cooling heat exchanger is installed in protection cavity, will occupy the internal space of protection cavity, makes the volume of protection cavity must be big, when air cooling heat exchanger is installed on the side wall outside cabinet body, will make the overall power cabinet need more floor area, therefore, no matter which kind of scheme, will make the floor area of cabinet body whole big.When multiple power cabinets are used side by side, this disadvantage is more prominent.In addition, since air cooling heat exchanger is installed on the side wall of cabinet body, the external circulation air duct of air cooling heat exchanger often extends along the vertical direction, generally, the air inlet of external circulation air duct is located below, and the air outlet is located above, which makes the air inlet of air cooling heat exchanger often close to the ground, when the power cabinet is used outdoors, the ground temperature is high, thus leading to the temperature of the air inlet of air cooling heat exchanger being relatively high, which makes the overall heat dissipation efficiency in the 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 method cannot meet the protection requirements of these devices.In addition, the air cooling method is also prone to cause short circuit of hot air flow, thereby causing thermal island effect of the entire power station. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the above-mentioned defects or problems in the background art, and provides a power cabinet with upward air outlet, which has good reactor heat dissipation effect, does not affect the protection effect of the high-protection area of the cabinet, and can effectively avoid thermal island effect of the power station.

[0004] To achieve the above-mentioned 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; a cover body is further provided, which is at least partially located in the protection cavity or below the protection cavity and forms an independent heat dissipation air duct; the heat dissipation air duct is provided with a third air outlet on the outer wall of the cabinet body, which is suitable for upward air outlet; and a reactor is located in the heat dissipation air duct to be cooled by the air flow in the heat dissipation air duct.

[0006] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the third air outlet is arranged at the middle or upper part of the side wall of the protection cavity and is provided with a wind guide and waterproof structure, which is used to guide the hot air discharged through the third air outlet to be obliquely upwardly discharged.

[0007] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein the cabinet body is provided with a first side wall and a second side wall parallel and opposite to each other along the X-axis direction; the cover body is located at the bottom of the protection cavity and is suitable for air inlet from the bottom of the cover body; the third air outlet is provided with the wind guide and waterproof structure, which comprises a frame arranged on the second side wall and a plurality of blades, each blade is arranged in the frame in a vertical direction and extends along the Y-axis direction, and each blade comprises a first guide plate obliquely outward from top to bottom and a second guide plate arranged on the upper surface of the first guide plate and obliquely inward from top to bottom.

[0008] The fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein a second centrifugal fan is further included; the cover body comprises a vertical section and two horizontal sections extending along the X-axis direction, the two horizontal sections are respectively located at the two ends of the vertical section in the Y-axis direction, the horizontal sections are 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 arranged in the vertical section; the second centrifugal fan is arranged in the horizontal section and is suitable for guiding the air flow in the vertical section to the third air outlet along the X-axis direction; the projection of the vertical section and the air passage at the bottom along the X-axis direction are staggered along the Y-axis direction.

[0009] The fifth technical solution is based on the fourth technical solution, which is a preferred embodiment of the fourth technical solution. The cabinet further comprises 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 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. The first air outlet, the second air outlet, and the third air outlet are all adapted to blow air upwards. The air-cooled heat exchanger is placed in the first ventilation cavity and is used to deliver cold air to the protection cavity and recover hot air from the protection cavity. The heat exchange device comprises a liquid-cooled unit placed in the second ventilation cavity and a radiator placed in the protection cavity and in communication with the cooling flow channel of the liquid-cooled unit. The protection assembly comprises the electric reactor placed in the heat dissipation air duct and the electrical assembly located outside the heat dissipation air duct and in the protection cavity. The electrical assembly is at least partially cooled by the radiator and at least partially cooled by the cold air delivered by the air-cooled heat exchanger.

[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 arranged in sequence from top to bottom. The projection of the protection cavity along the vertical direction covers the first ventilation cavity and the second ventilation cavity. 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 provided on the second side wall. The second air outlet is provided on the top of the second ventilation cavity. 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 in communication with the air-cooled heat exchanger along the X-axis direction. 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. The partition plate separates the protection cavity into a through-cavity close to the first side wall and used only for air passing and a containing cavity close to the second side wall. The through-cavity and the containing cavity are respectively in communication with the cold air outlet and the hot air return air outlet. The electrical assembly is adapted to be cooled by the circulating air flow from the through-cavity to the hot air return air outlet.

[0011] The seventh technical solution is based on the sixth technical solution, and is a preferred embodiment of the sixth technical solution, wherein the air guide member is further included, the hot air return air outlet and the cold air outlet are both above the accommodating cavity, the air guide member extends along the X-axis direction, the upper end of the air guide member is communicated with the cold air outlet, the end of the air guide member close to the hot air return air outlet is provided with a first air outlet for downward air outlet to deliver cold air to the accommodating cavity, and the end of the air guide member away from the hot air return air outlet is provided with a second air outlet for air outlet to the air passing cavity; the first centrifugal fan is arranged in the air guide member, the first centrifugal fan is suitable for driving the air flow of the hot air return air outlet to the cold air outlet, and the air volume of the second air outlet is greater than that of the first air outlet; and the protection assembly is further suitable for heat dissipation by the circulating air flow from the first air outlet to the hot air return air outlet.

[0012] The eighth technical solution is based on the seventh technical solution, and is a preferred embodiment of the seventh technical solution, wherein the protection assembly is provided with the first electrical component and the second electrical component which are spaced apart along the X-axis direction close to the first air outlet, the first electrical component and the second electrical component form an air passing channel corresponding to the first air outlet; the vertical section of the cover body is provided with an air guide surface inclined relative to the vertical direction and the X-axis direction corresponding to the air passing channel so that the air flow of the air passing channel is suitable for inclined downward flow; the first electrical component is close to the partition plate, the protection assembly further includes a third electrical component, the third electrical component is close to the partition plate and below the first electrical component, and the air passing outlet is at least partially located between the first electrical component and the third electrical component.

[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 further includes a fourth electrical component, the fourth electrical component is arranged at the bottom of the accommodating cavity close to the second side wall, the cover body is provided with two air guide surfaces gradually 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 air guide surfaces, and the fourth electrical component is located downstream of the air flow guided by the other air guide surface; the second electrical component is a capacitor module, the capacitor module includes an electrical plate member in a plate-shaped structure and suitable for carrying a plurality of electrical units, the electrical plate member extends along the vertical direction and forms the air passing channel with the first electrical component; the first electrical component is a direct-current electrical component; the third electrical component is a fuse; and the fourth electrical component is an alternating-current electrical component.

[0014] The tenth technical solution is based on the ninth technical solution, and is a preferred embodiment of the ninth technical solution, wherein the protection assembly comprises a fifth electrical component and a sixth electrical component, the heat sink is adapted to dissipate heat for the fifth electrical component, the fifth electrical component is close to the hot air return air inlet, the sixth electrical component is arranged at the bottom of the accommodation cavity and close to the air passage at the bottom, the top of the vertical section is further provided with an air guide surface parallel to the X-axis and the Y-axis, two air 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 channel extending along the X-axis direction between the second electrical component and the air guide surface to guide the air flow to the fifth electrical component.

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

[0016] In the first technical solution and related embodiments, a relatively closed protection cavity is formed in the cabinet body, and a cover body is additionally formed in the protection cavity, thereby forming an independent heat dissipation air duct for the electric reactor, the electric reactor has good heat dissipation effect, and the protection effect in the high protection area of the cabinet is not affected, and since the third air outlet of the heat dissipation air duct discharges air upward, the hot air discharged from the third air outlet is not easy to flow downward into the downstream power cabinet due to the low density of hot air, 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, thereby effectively avoiding the thermal island effect of the power station.

[0017] In the second technical solution and related embodiments, the third air outlet is located on the side wall of the protection cavity, which can better avoid the rainwater from entering the cover body from the third air outlet in the opposite direction when the power cabinet is located outdoors, thereby affecting the insulation performance of the electric reactor. Correspondingly, the third air outlet is located at the middle and upper part of the side wall of the protection cavity. This is more conducive to the upward floating of hot air. Further, the air guide and waterproof structure can not only prevent rainwater from entering from the side wall of the cabinet in the opposite direction, but also can guide the hot air discharged through the third air outlet to be discharged upwardly and obliquely, thereby realizing upward air discharge when the air outlet is located on the side wall.

[0018] In the third technical solution and related embodiments, the cover 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 is located in the protection cavity, the waterproof requirement of the cover is higher, in the technical solution, the third air outlet is provided with a wind-guiding waterproof structure, 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, at the same time, the second guide plate is inclined inward from top to bottom, and when the air flow is sent out from the louver, the second guide plate can guide the air flow to be 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 rain from entering the louver from the ground when the rain splashes upward, thereby avoiding water entering the heat dissipation air duct and improving the protection of the protection cavity.

[0019] In the fourth technical solution and related embodiments, the cover includes a vertical section and two horizontal sections, the two horizontal sections are located at two ends of the vertical section in the Y-axis direction, the outer wall of the horizontal section can guide the air flow of the air passage to the second side wall, further avoiding the air flow blind area in the accommodation cavity, the inner wall of the two horizontal sections is more conducive to the wind pressure balance in the vertical section, thereby being more conducive to the air outlet and heat dissipation. In addition, the structure of the cover makes the air flow in the vertical section more easily enter the second centrifugal fan, and the air outlet is more smooth. The reactor is located in the vertical section of the cover, which is conducive to the installation of the heavy reactor, the second centrifugal fan is located in the horizontal section, which is conducive to realizing the reversing of the air flow and reducing the floor area compared with the axial flow fan; the projection of the vertical section and the air passage located at the bottom along the X-axis direction along the Y-axis direction is staggered with each other, thereby avoiding the cover blocking the air flow of the air passage.

[0020] In the fifth technical solution and the related embodiments, the first ventilation cavity and the second ventilation cavity are located above the protection cavity, the air-cooled heat exchanger is arranged in the first ventilation cavity, and a projection of the protection cavity and the first ventilation cavity in the vertical direction at least partially overlaps, so that the air-cooled heat exchanger does not occupy the internal space of the protection cavity or the side space of the cabinet body, 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 smallest, and the projection area of the power cabinet on the ground in the vertical direction is smallest, that is, the space of 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 inlet of the first ventilation cavity and the air inlet of the second ventilation cavity are necessarily far away from the ground, so that the air inlet temperature of the air-cooled heat exchanger is relatively low, thereby ensuring that the air flow of the air outlet of the cold air has a relatively 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 that when multiple power cabinets are used side by side, the hot flow disturbance to the downstream power cabinet is not easy to occur, and even if the hot flow flows out from the side of the top of the cabinet body, the hot air has a small density and is not easy to affect the downstream power cabinet.

[0021] Since the first air outlet, the second air outlet and the third air outlet are adapted to upward air outlet, the power cabinet as a whole forms an upward air outlet structure. Since the hot air has a low 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 in the X-axis direction or the Y-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 that may exist in the protection cavity is reduced. In the present 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-cooled heat exchanger is located on the side of the protection cavity, the part of the protection cavity connected with the external circulation heat dissipation is reduced. As is well known to those skilled in the art, the part of the external circulation needs to be waterproofed, so that the above 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.

[0022] In addition, the above arrangement also enables the protection assembly in the protection cavity to be mainly cooled by liquid cooling and air cooling, and the liquid cooling has high cooling efficiency, and since the air cooling heat exchanger and the liquid cooling unit are both cooled by external circulation, the protection of the protection cavity can be improved. The combination of liquid cooling and air cooling can maximize the cooling efficiency of the protection assembly in the protection cavity, and the protection cavity has good protection. In actual application, all of the protection assembly except the reactor can be placed in the protection cavity, thereby improving the protection of the protection assembly. The reactor is located in a separate cooling air duct, and has high cooling efficiency.

[0023] In the sixth aspect 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 less space in the X-axis direction, which is conducive to reducing the floor area required by multiple power cabinets when the power cabinets are combined; 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 outlet is arranged on the top of the power cabinet, that is, the two sides of the cabinet body in the X-axis direction form an air inlet surface and an air outlet surface, respectively. In actual application, the first air inlet and the first air outlet of the first ventilation cavity are communicated with the external circulation air duct of the air flow heat exchanger, and the second air inlet and the second air outlet of the second ventilation cavity are communicated with the external circulation air duct of the liquid cooling unit. Therefore, the above arrangement avoids the hot air flow short circuit caused by the backflow of the hot air of the first air outlet to the first air inlet, and also avoids the hot air flow of the second air outlet flowing into the second air inlet or the air inlet of the downstream power cabinet, thereby improving the cooling efficiency of the protection assembly. 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 arrangement also creates conditions for the power cabinets to be combined along the Y-axis direction.

[0024] The over-wind cavity is only used for over-wind, that is, the over-wind cavity is not used for placing the protection assembly, so in actual operation, the length of the over-wind cavity along the X-axis direction can be reduced as much as possible and the length of the containing cavity along the X-axis direction can be increased, and such arrangement is beneficial to increasing the wind pressure and flow rate of the air flow in the over-wind cavity, facilitating the air outlet of the over-wind 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 arrangement of the over-wind cavity and the over-wind opening makes the cold air of the cold air outlet flow into the containing cavity with relatively low pressure through the over-wind opening after flowing into the over-wind cavity, and in actual application, the over-wind opening can be arranged on the partition plate for the place in the containing cavity which is not easy to over-wind, thereby avoiding the formation of the air flow blind area in the containing cavity, and in the technical solution, at least part of the over-wind 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 over-wind opening can flow through the bottom of the containing cavity and then flow upward, thereby avoiding the formation of the air flow blind area at the bottom of the containing cavity and avoiding the formation of the air flow blind area on one side of the second side wall, since the over-wind opening on the partition plate 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 simultaneously carry away the heat of the protection assembly in the process of flowing toward the hot air return opening, thereby improving the heat dissipation efficiency of the protection assembly and making it unnecessary to make the turbulence fan to be distributed everywhere in the containing cavity, thereby facilitating the 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, compared with the vertical arrangement in the prior art, the height space of the cabinet body is fully utilized, thereby saving the floor area.

[0025] In the seventh technical solution and the related embodiments, since the air-cooled heat exchanger has a specific specification, the distance between the cold air outlet and the hot air return opening corresponding to the circulating air duct in the air-cooled heat exchanger cannot be too far, and the arrangement of the air guide member makes the distance between the cold air outlet and the hot air return opening relatively short, thereby facilitating the arrangement of the air-cooled heat exchanger. The cold air outlet and the hot air return opening both correspond to the upper part of the containing cavity, the air flow of the cold air outlet is introduced into the over-wind cavity by the air guide member in a direction away from the hot air return opening, so that the length of the over-wind cavity along the X-axis direction can be reduced as much as possible, thereby making the air flow flow into the over-wind cavity from the second air outlet accelerate and pressurize in the over-wind cavity, and then accelerate again when flowing out through the over-wind opening, thereby quickly carrying away the heat of the protection assembly; wherein, the protection assembly is also suitable for heat dissipation by the circulating air flow from the first air outlet to the hot air return opening, so that a plurality of clusters of cold air flow in different directions can be formed in the containing cavity, thereby further avoiding the air flow blind area and improving the heat dissipation efficiency, and in actual application, the part of the protection assembly with relatively low heat generation can be placed at the first air outlet, so as to ensure the balanced heat dissipation of the protection assembly. The first centrifugal fan is arranged in the air guide member, the centrifugal fan has smaller floor area than the axial flow fan, and the air flow can be reversed, the air volume of the second air outlet is greater than that of the first air outlet, thereby ensuring that most of the cold air flows into the over-wind cavity and ensuring the balanced heat dissipation of the protection assembly.

[0026] In the eighth technical solution and related embodiments, the first electrical component and the second electrical component form an air passage 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, and is conducive to the downward flow of the air flow of the first air outlet, and the heat of the first electrical component and the second electrical component can be taken away synchronously in the process of downward flow. The cover body is further provided with a wind guide surface, so that the air flow of the first air outlet is adapted to flow downward, and the cold air can further flow to the wind flow blind area or the area with small air volume, thereby improving the overall heat dissipation efficiency of the protection assembly. Thus, the structure of the cover body and the layout of the electric reactor in the accommodating cavity form an air passage, which is ingenious.

[0027] The air passage is at least partially located between the first electrical component and the third electrical component, so that the first electrical component and the second electrical component can be cooled by the cold air discharged from the first air outlet, and the third electrical component can be cooled by the cold air discharged from the air passage, thereby improving the heat dissipation efficiency.

[0028] In the ninth technical solution and related embodiments, the wind guide surface of the cover body can guide the air flow of the first air outlet to the third electrical component and the fourth electrical component respectively, thereby improving the heat dissipation efficiency of the third electrical component and the fourth electrical component, and the two wind guide surfaces are conducive to the rotation of the air flow in the vertical section of the cover body, thereby facilitating the air outlet of the horizontal section.

[0029] The second electrical component is a capacitor module, the air passage is formed between the electrical plate of the capacitor module and the first electrical component, and the structure of the capacitor module is fully utilized to form the air passage; the first electrical component is a direct-current electrical component; the third electrical component is a fuse; and the fourth electrical component is an alternating-current electrical component, which is convenient for wiring of the electrical components of the protection assembly, and enables each electrical component to have high heat dissipation efficiency.

[0030] In the tenth technical solution and related embodiments, the cold air discharged from the first air outlet flows downward to the third electrical component and the fourth electrical component through the air passage guided by the wind guide surface, and part of the cold air flows to the fifth electrical component through the air guide passage, thereby avoiding the high local temperature caused by the proximity of the fifth electrical component to the hot air return air outlet. The sixth electrical component near the bottom air passage is located at the bottom of the accommodating cavity, so that the air passage at the bottom can quickly take away the heat of the sixth electrical component, and then dissipate the heat of other electrical components. In actual application, the sixth electrical component has low heat generation, thereby ensuring the balanced heat dissipation of each electrical component. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 Schematic diagram of power cabinet of the embodiment of the present application Figure 1

[0033] Figure 2 Schematic diagram of power cabinet of the embodiment of the present application Figure 2

[0034] Figure 3 Schematic diagram of the inside of the power cabinet of the embodiment of the present application Figure 1

[0035] Figure 4 Schematic diagram of the inside of the power cabinet of the embodiment of the present application Figure 2 , wherein the cover hides a horizontal section;

[0036] Figure 5 Schematic diagram of the wind direction flow of the embodiment of the present application Figure 4

[0037] Schematic diagram of the cover of the embodiment of the present application Figure 6

[0038] Schematic diagram of the second side wall of the embodiment of the present application Figure 7

[0039] Schematic diagram of the wind guiding and waterproof structure of the embodiment of the present application Figure 8

[0040] Schematic diagram of the first side wall of the hidden part of the embodiment of the present application Figure 9

[0041] Schematic diagram of the wind guiding part of the embodiment of the present application Figure 10 Figure 1

[0042] Figure 11 Schematic diagram of the wind guiding part of the embodiment of the present application Figure 2 .

[0043] Explanation of main reference signs:

[0044] ​​​​​Cabinet 10; first side wall 11; first air inlet 111; second air inlet 112; second side wall 12; first air outlet 121; third air outlet 122; first abutting wall 13; second abutting wall 14; second air outlet 15; cover body 16; vertical section 161; air 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 plate 19; air passage 191; protection cavity 01; first ventilation cavity 02; second ventilation cavity 03; accommodating cavity 04; air passage cavity 05; air-cooled heat exchanger 20; heat exchange device 30; liquid cooling unit 31; radiator 32; air guide piece 40; first air outlet 41; second air outlet 42; protection assembly 50; first electrical component 51; second electrical component 52; electrical plate component 521; third electrical component 53; fourth electrical component 54; electric reactor 55; fifth electrical component 56; sixth electrical component 57; air guide and waterproof structure 60; frame body 61; blade 62; first guide plate 63; second guide plate 64. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model, and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0046] In the claims, description and drawings of the utility model, 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, description and drawings of the utility model, unless otherwise explicitly limited, for the orientation words, such as the terms "center", "transverse", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" indicate the orientation or position relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the utility model.

[0048] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0049] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0050] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction into front and back, and the Z-axis direction into up and down.

[0051] See Figures 1-11 , Figures 1-11 A power cabinet is shown, including a cabinet body 10, an air-cooled heat exchanger 20, a heat exchange device 30, an air guide 40, a protective assembly 50, and a second centrifugal fan (not shown in the figure).

[0052] See Figures 1-2 The cabinet 10 is rectangular in shape. The cabinet 10 has a first side wall 11 and a second side wall 12 that are opposite to each other and extend vertically along the X-axis. The cabinet 10 has a first abutting wall 13 and a second abutting wall 14 that are opposite to each other and extend vertically along the Y-axis.

[0053] See Figures 3-4 The cabinet 10 is provided with a relatively sealed protective cavity 01 and 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 overlaps at least partially with the projections of the first ventilation cavity 02 and the second ventilation cavity 03 in the vertical direction. In this embodiment, the second ventilation cavity 03, the first ventilation cavity 02 and the protective cavity 01 are arranged sequentially from top to bottom, and the projection of the protective cavity 01 in the vertical direction covers the first ventilation cavity 02 and the second ventilation cavity 03. Figures 3-4 In the middle, the lengths of the protective cavity 01, the first ventilation cavity 02 and the second ventilation cavity 03 along the X-axis and Y-axis are all close to the same.

[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 upward air outlet, and in actual application, an upper air outlet louver can be installed at the first air outlet 121. The upper air outlet louver belongs to the prior art, and will not be described in detail in this embodiment. In this embodiment, "upward air outlet" means that the air outlet angle is upward, for example, air outlet toward the top of the cabinet or inclined upward air outlet.

[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 arranged at the bottom of the protection cavity 01. The cover body 16 includes a vertical section 161 and two horizontal sections 162 extending along the X-axis direction, and the two horizontal sections 162 are respectively located at the two ends of the vertical section 161 in the Y-axis direction. The bottom of the cabinet body 10 is provided with a third air inlet 17 communicating with the bottom end of the vertical section 161, and 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, see Figure 4 and Figure 6 The top of the vertical section 161 is provided with a wind guiding surface 1611 parallel to the X-axis and the Y-axis and two wind guiding surfaces 1612 located at the two ends of the wind guiding surface 1611 along the X-axis direction. The two wind guiding surfaces 1612 are arranged along the X-axis direction and gradually away from each other from top to bottom in an eight-shaped manner.

[0056] In this embodiment, 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 upward air outlet, that is, the third air outlet 122 of the heat dissipation air duct is formed on the second side wall 12. A second centrifugal fan (not shown in the figure) is arranged in the horizontal section 162 and adapted to guide the airflow of the vertical section 161 along the X-axis direction to the third air outlet 122. In this embodiment, the third air outlet 122 is arranged in the middle or upper part of the second side wall 12, and in other embodiments, the third air outlet 122 can also be arranged in the middle and upper part of the second side wall 12.

[0057] The third air outlet 122 can be provided with a wind guiding and waterproof structure 60, which can be used to guide the hot air discharged through the third air outlet 122 to be inclined upward. See Figures 7-8The air guiding and water preventing structure 60 comprises a frame 61 arranged on the second side wall 12 and a plurality of blades 62. The frame 61 is fixed to the second side wall 12. The blades 62 are arranged in the frame 61 in the vertical direction and extend along the Y-axis direction. Each blade 62 comprises a first guiding plate 63 which inclines outward from top to bottom and a second guiding plate 64 which is arranged on the upper surface of the first guiding plate 63 and inclines 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 outlet 182 in the X-axis direction. The hot air return air outlet 181 is close to the second side wall 12.

[0059] In the embodiment, the protection cavity 01 is provided with a partition plate 19 which extends in the vertical direction and is close to the first side wall 11. The partition plate 19 separates the protection cavity 01 into a through cavity 05 which is close to the first side wall 11 and is only used for air passing and a containing cavity 04 which is 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 the protection assembly. The through cavity 05 and the containing cavity 04 are respectively communicated with the cold air outlet 182 and the hot air return air outlet 181. Figures 3-4 In the embodiment, the cold 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 the vertical direction and at least part of the through air outlets 191 are located at the bottom of the partition plate 19. 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 9 In the embodiment, the through air outlets 191 located at the bottom are two. The two through air outlets 191 correspond to the gap between the vertical section 161 of the cover body 16 and the first abutting wall 13 and the gap between the vertical section 161 of the cover body 16 and the second abutting wall 14 respectively.

[0060] The air cooling heat exchanger 20 is arranged in the first ventilation cavity 02 and is supported on the supporting plate 18. The air cooling heat exchanger 20 is communicated with the hot air return air outlet 181 and the cold air outlet 182 to cool the hot air of the hot air return air outlet 181 into the cold air of the cold air outlet 182. In actual application, the outer circulation air duct of the air cooling heat exchanger 20 is communicated with the first air inlet 111 and the first air outlet 121. The inner circulation air duct of the air cooling heat exchanger 20 is communicated with the hot air return air outlet 181 and the cold air outlet 182. The outer circulation air duct and the inner circulation air duct are heat exchanged 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.

[0061] The heat exchange device 30 comprises a liquid cooling unit 31 arranged in the second ventilation cavity 03 and a heat sink 32 arranged in the protection cavity 01 and in communication with the cooling flow channel of the liquid cooling unit 31, the heat sink 32 is a liquid cooling plate in this embodiment, and the cooling flow channel of the liquid cooling unit 31 exchanges heat with the circulating air flow of the second air inlet 112 to the second air outlet 15 to achieve cooling. The liquid cooling unit 31 belongs to the prior art, and details are not repeated in this embodiment.

[0062] Referring to Figures 3-4 and Figures 10-11 , the air guide piece 40 extends along the X-axis direction, is arranged in the protection cavity 01, and has an upper end in communication with the cold air outlet 182, an end close to the hot air return air outlet 181 provided with a first air outlet 41 for downward air outlet to deliver cold air to the containing cavity 04, and an end away from the hot air return air outlet 181 provided with a second air outlet 42 for air outlet to the air passing cavity 05; the air guide piece 40 is provided with a first centrifugal fan (not shown in the figure), which is adapted to drive the air flow of the hot air return air outlet 181 to the cold air outlet 182, and the air volume of the second air outlet 42 is greater than that of the first air outlet 41. Figures 10-11 In the specific embodiment, the first air outlet 41 and the second air outlet 42 are both two, the two first air outlets 41 are arranged at intervals along the X-axis direction and both extend along the Y-axis direction, and the two second air outlets 42 are arranged at intervals along the Y-axis direction, and the second air outlet 42 is adapted to air outlet along the X-axis direction. Of course, in other embodiments, the second air outlet 42 can also be inclined downward. Figures 3-4 In the specific embodiment, the second air outlet 42 and the hot air return air outlet 181 are away from each other along the X-axis direction, and the bottom air passing port 191 is located at two most distant corners of the containing cavity 04, respectively.

[0063] The protection assembly 50 is arranged in the containing cavity 04 in the protection cavity 01, and comprises an electric reactor 55 arranged in the heat dissipation air duct and an electrical assembly located outside the heat dissipation air duct and in the containing cavity 04, the electric reactor 55 is arranged in the vertical section 161 of the cover body 16, and the electrical assembly is at least partially cooled by the heat sink 32 and at least partially cooled by the cold air delivered by the air-cooled heat exchanger 20, in this embodiment, the air-cooled heat dissipation of the electrical assembly is at least partially cooled by the circulating air flow of the air passing port 191 to the hot air return air outlet 181, and at least partially cooled by the circulating air flow of the first air outlet 41 to the hot air return air outlet 181.

[0064] In the embodiment, the projection of the protection cavity 01 in the vertical direction covers the first ventilation cavity 02 and the second ventilation cavity 03, so that the overall power cabinet occupies a small space in the X-axis direction, which is conducive to reducing the floor area required by multiple power cabinets when they 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 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 far from the ground, so that the air inlet temperature of the air-cooled heat exchanger 20 is relatively low, thereby ensuring that the air flow of the cold air outlet 182 always has a low temperature, and also making the heat dissipation efficiency of the liquid cooling unit 31 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 circulation air duct of the air-cooled heat exchanger 20, and the second air inlet 112 and the second air outlet 15 of the second ventilation cavity 03 are in communication with the outer circulation air duct of the liquid cooling unit 31. Therefore, the above arrangement avoids the hot air flow of the first air outlet 121 from flowing back to the first air inlet 111, causing a short circuit of hot air flow, and also avoids the hot air flow of the second air outlet 15 from flowing into 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 located on the two sides of the cabinet body 10 along the X-axis direction, the above arrangement also creates conditions for the power cabinet 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 discharge air upward, so that the power cabinet forms a structure for discharging 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 will 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 heat exchanger 20 is located aside the protection cavity 01, the part of the protection cavity 01 connected with the outer circulation heat dissipation is reduced. As known by those skilled in the art, the part of the outer circulation needs to be waterproofed, so that the above arrangement 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 arrangement also enables the electrical components in the protection cavity 01 to be mainly cooled by liquid cooling and air cooling, and the liquid cooling has high cooling efficiency. Since the air cooling heat exchanger 20 and the liquid cooling unit 31 both perform external circulation cooling, the protection property of the protection cavity 01 can be improved. The combination of liquid cooling and air cooling can maximize the cooling efficiency of the protection components 50 in the protection cavity 01, and the protection property of the protection cavity 01 is good. The reactor 55 is located in a separate cooling air duct, and has high cooling efficiency.

[0068] The cover 16 is located in the protection cavity 01, so that the protection components 50 are basically located in the protection cavity 01, and the protection property is high. Since the cover 16 is located in the protection cavity 01, the waterproof requirement of the cover 16 is high. In the embodiment, the third air outlet 122 is provided with a wind guide waterproof structure 60, and 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, and when rain hits the first guide plate 63, the water flow will flow downward along the first guide plate 63, thereby achieving the purpose of waterproofing. Meanwhile, the second guide plate 64 is inclined inward from top to bottom, and can guide the air flow to be sent out from the louver to be inclined upward, thereby avoiding the hot air from being accumulated at the lower side of the power cabinet. Meanwhile, the second guide plate 64 can also prevent rain from entering the louver from the ground when splashing upward, thereby avoiding water from entering the cooling air duct, and improving the protection property of the protection cavity 01.

[0069] 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, and such arrangement is beneficial to increase the air pressure and flow rate of the air flow in the air passing cavity 05, facilitates the air outlet of the air passing opening 191 and the rapid flow of the air flow in the containing cavity 04, thereby creating conditions for improving the heat dissipation efficiency of the protection assembly 50, and making the containing cavity 04 have a larger space; wherein, the arrangement of the air passing cavity 05 and the air passing opening 191 makes the cold air of the cold air outlet 182 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 opened on the partition plate 19 for the place in the containing cavity 04 which is not easy to pass air, thereby avoiding the formation of air flow blind area 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 air opening 181 is close to the second side wall 12, the cold air flowing out of the air passing opening 191 can flow through the bottom of the containing cavity 04 and then flow upward, thereby avoiding the formation of air flow blind area at the bottom of the containing cavity 04, and avoiding the formation of air flow blind area 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, multiple layers of cold air flow can be formed in the vertical direction, and the multiple layers of cold air flow can carry away the heat of the protection assembly 50 synchronously during flowing to the hot air return air opening 181, thereby improving the heat dissipation efficiency of the protection assembly 50, and making it unnecessary to make the turbulence fan to be distributed with air flow everywhere in the containing cavity 04, thereby facilitating the later maintenance.

[0070] In the embodiment, the air-cooled heat exchanger 20 has a specific specification, and the distance between the cold air outlet 182 and the hot air return outlet 181 corresponding to the internal circulation air duct cannot be too far. The air guide member 40 is arranged to shorten the distance between the cold air outlet 182 and the hot air return outlet 181, thereby facilitating the arrangement of the air-cooled heat exchanger 20. The hot air return outlet 181 and the cold air outlet 182 are both located above the accommodation cavity 04. The air flow of the cold air outlet 182 is guided by the air guide member 40 to the air passing cavity 05 in a direction away from the hot air return outlet 181, so that the length of the air passing cavity 05 in the X-axis direction can be reduced as much as possible, thereby accelerating and pressurizing the air flow flowing into the air passing cavity 05 from the second air outlet 42, and then accelerating the air flow flowing out through the air passing opening 191, so that the heat of the protection assembly 50 can be quickly taken away. The protection assembly 50 is also adapted to dissipate heat by the circulation air flow from the first air outlet 41 to the hot air return outlet 181, so that multiple clusters of cold air flow in different directions can be formed in the accommodation cavity 04, further avoiding the air flow blind area and improving the heat dissipation efficiency. In actual application, the part of the protection assembly 50 with relatively low heat generation can be placed at the first air outlet 41 to ensure balanced heat dissipation of the protection assembly 50. The air guide member 40 is provided with a first centrifugal fan. Compared with an axial flow fan, the centrifugal fan has a smaller footprint and can realize air flow reversing. The air volume of the second air outlet 42 is greater than that of the first air outlet 41, which ensures that most of the cold air flows into the air passing cavity 05 and ensures balanced heat dissipation of the protection assembly 50.

[0071] In the embodiment, the cover body 16 includes a vertical section 161 and two horizontal sections 162. The two horizontal sections 162 are respectively located at both ends of the vertical section 161 in the Y-axis direction. The outer wall of the horizontal section 162 can guide the air flow of the air passing opening 191 to the second side wall 12, further avoiding the air flow blind area in the accommodation cavity 04. The inner wall of the two horizontal sections 162 is more conducive to the air pressure balance in the vertical section 161, thereby being more conducive to air outlet heat dissipation. In addition, the structure of the cover body 16 makes the air flow in the vertical section 161 more easily enter the second centrifugal fan, and the air outlet is smoother. The reactor 55 is arranged in the vertical section 161 of the cover body 16, which is conducive to the installation of the heavy reactor 55. The second centrifugal fan is arranged in the horizontal section 162, which is conducive to realizing air flow reversing and reducing the footprint compared with an axial flow fan. The projection of the vertical section 161 and the air passing opening 191 located at the bottom along the X-axis direction is staggered along the Y-axis direction, thereby avoiding the cover body 16 blocking the air flow of the air passing opening 191.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 heat sink 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.

[0077] 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 of 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.

[0078] 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.

[0079] 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.

[0080] It can be known that the above arrangement fully utilizes the structure of the first electrical component 51 and the second electrical component 52 and the layout of the protection assembly 50 to form the air passage, which is beneficial to the downward flow of the air flow of the first air outlet 41 and can take away the heat of the first electrical component 51 and the second electrical component 52 synchronously in the process of downward flow. The structure of the cover body 16 (the air guide surface 1611 and the air guide surface 1612) and the layout of the electrical reactor 55 are combined to form the air passage in the accommodating cavity 04, which is combined with the arrangement of the air passage 191 and is beneficial to taking away the heat of the third electrical component 53 and the fourth electrical component 54. The two air guide surfaces 1612 are beneficial to the rotation of the air flow in the vertical section 161, thereby being beneficial to the air outlet. The fifth electrical component 56 is cooled by the heat sink 32, so that the temperature of the fifth electrical component 56 as a whole is not high. The fifth electrical component 56 is placed close to the hot air return air outlet 181 and the heat thereof is taken away through the air guide passage, thereby avoiding the local temperature of the fifth electrical component 56 from being too high. The sixth electrical component 57 generates a small amount of heat, and the sixth electrical component 57 is close to the bottom air passage 191. The temperature of the sixth electrical component 57 will not be too high after the cold air passes through the sixth electrical component 57, thereby ensuring the balanced heat dissipation of other electrical components. Therefore, the above arrangement also makes the wiring of the first to sixth electrical components convenient and makes each electrical component have a higher heat dissipation efficiency and balanced overall heat dissipation.

[0081] In the embodiment, the first end and the second end of the cabinet 10 along the X-axis direction are respectively provided with a first movable door and a second movable door, the first movable door and the second movable door are fixed to form a first side wall 11 and a second side wall 12 respectively, and the baffle 19 is close to the first end; the second side wall 12 is adapted to be sealingly connected with the two horizontal sections 162 of the cover body 16 to make the horizontal sections 162 communicate with the third air outlet 122.

[0082] 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 has a spacing when being fixed with the first movable door. Therefore, the above-mentioned arrangement fully utilizes the structure of the cabinet 10 itself to form the air passing cavity 05, that is, the baffle 19 can exist as the sealing plate of the protection assembly 50, and can also cooperate with the first movable door to form the air passing cavity 05, 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.

[0083] 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 enclosed protective cavity (01); it also has a cover (16), which is at least partially located inside or below the protective cavity (01) and forms an independent heat dissipation duct; the heat dissipation duct has a third air outlet (122) on the outer wall of the cabinet (10) suitable for upward airflow; and A reactor is located within the heat dissipation duct to be cooled by the airflow within the duct.

2. The power cabinet as described in claim 1, characterized in that, The third air outlet (122) is located in the middle or upper part of the side wall of the protective cavity and is provided with a wind-guiding and waterproof structure (60). The wind-guiding and waterproof structure (60) is used to guide the hot air discharged through the third air outlet (122) to be discharged obliquely upward.

3. The power cabinet as described in claim 2, characterized in that, The cabinet (10) is provided with a first sidewall (11) and a second sidewall (12) that are parallel to each other and opposite to each other along the X-axis direction; the cover (16) is located at the bottom of the protective cavity (01) and is adapted to allow air to enter from the bottom of the cover (16); the third air outlet (122) is provided with the air guiding and waterproof structure (60), the air guiding and waterproof structure (60) includes a frame (61) and a number of blades (62) provided on the second sidewall (12), each blade (62) is arranged at intervals in the frame (61) along the vertical direction and extends along the Y-axis direction, 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.

4. The power cabinet as described in claim 3, 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.

5. The power cabinet as described in claim 4, characterized in that, The cabinet (10) is also provided with 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 overlaps at least partially with the projection of the first ventilation cavity (02) and the second ventilation cavity (03) in the vertical direction. 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). The first air outlet (121), the second air outlet (15) and the third air outlet (122) are all suitable for upward air discharge. Also includes: An air-cooled heat exchanger (20) is placed in the first ventilation chamber (02) and is used to deliver cold air to the protective chamber (01) and recover hot air from the protective chamber (01); A heat exchange device (30) comprising a liquid cooler unit (31) disposed within the second ventilation chamber (03) and a radiator (32) disposed within the protective chamber (01) and communicating with the cooling channels of the liquid cooler unit (31); and The protective assembly (50) includes the reactor (55) placed inside the heat dissipation duct and an electrical assembly located outside the heat dissipation duct and inside the protective cavity (01), the electrical assembly being at least partially cooled by a radiator (32) and at least partially cooled by cold air delivered by an air-cooled heat exchanger (20).

6. The 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 first sidewall (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 sidewall (12). The second air outlet (15) is provided at the top of the second ventilation cavity (03). 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 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); the electrical components are adapted to dissipate heat from the circulating airflow from the air passage (191) to the hot air return outlet (181).

7. The power cabinet as described in claim 6, characterized in that, It also includes an air guide (40), wherein 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, 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). The air vent (191) is at least partially located between the first electrical component (51) and the third electrical component (53).

9. A power cabinet as described in claim 8, characterized in that, The protective assembly (50) also includes a fourth electrical component (54), which is located near the second sidewall (12) at the bottom of the accommodating cavity (04). The cover (16) is provided with two air guide surfaces (1612) that gradually move away from each other from top to bottom along the X-axis. The third electrical component (53) is located downstream of the airflow guided by one of the air guide surfaces (1612), and the fourth electrical component (54) is located downstream of the airflow guided by the other air guide surface (1612). The 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.

10. A power cabinet as described in claim 9, characterized in that, The protective assembly (50) includes a fifth electrical component (56) and a sixth electrical component (57). The radiator (32) is adapted to dissipate heat for the fifth electrical component (56), which is located near the hot air return vent (181). The sixth electrical component (57) is located near the bottom air vent (191) 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, and 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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