An electrical cabinet

Abstract

The application provides an electrical cabinet, and belongs to the technical field of electrical equipment, which comprises a cabinet body, a power device group, a heat exchanger and a turbulence fan group. The cabinet body has a closed cavity; the closed cavity is provided with a first air duct and a second air duct; the first air duct and the second air duct are arranged in parallel; the power device is arranged in the closed cavity and comprises a high-heat-emitting module, the high-heat-emitting module is connected with a radiator in a matched mode, and the radiator is located in the second air duct; the heat exchanger comprises a condensing part and an evaporating part; the condensing part is located in the first air duct; the evaporating part is located in the closed cavity and is located upstream of the high-heat-emitting module; and the turbulence fan group is arranged in the closed cavity. The electrical cabinet provided by the application allows the first air duct and the second air duct to be distributed in parallel, allows the radiator and the heat exchanger to be respectively located in independent air ducts, allows the radiator and the heat exchanger to respectively receive cold air, avoids heat accumulation effect, allows the airflow in the closed cavity to form circulating flow, avoids local hot spot problems, and can also reduce the ring temperature of the closed cavity.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrical equipment, and more particularly to an electrical cabinet. BACKGROUND

[0002] The electrical cabinet usually includes power devices such as an inverter module, a reactance module and a capacitor busbar module. Since the electrical cabinet is usually applied in a harsh environment such as high temperature, high humidity and high dust, in order to protect the power devices inside the electrical cabinet, the electrical cabinet is required to have high sealing performance and high protection level,

[0003] Therefore, the electrical cabinet can only be closed for heat dissipation.

[0004] In the prior art, in order to improve the heat dissipation efficiency of the electrical cabinet, an air-to-air heat exchanger is arranged on the door panel of the electrical cabinet, part of the air-to-air heat exchanger is located inside the electrical cabinet, and part of the air-to-air heat exchanger is located outside the electrical cabinet. Heat conduction is formed by using the air-to-air heat exchanger to take away the heat inside the electrical cabinet. However, for the electrical cabinet with a large space, some power devices with large heat generation are far away from the air-to-air heat exchanger, and there is a local hot spot problem, which leads to poor overall heat dissipation effect of the electrical cabinet. SUMMARY

[0005] The purpose of the present application is to provide an electrical cabinet, which aims to solve the technical problems of local hot spots and poor heat dissipation effect of the electrical cabinet with a large space in the prior art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is to provide an electrical cabinet, comprising:

[0007] A cabinet body having a closed cavity; a first air duct and a second air duct are arranged in the closed cavity; the first air duct and the second air duct are arranged in parallel;

[0008] A power device group is arranged in the closed cavity; the power device group includes a high-heat module, the high-heat module is connected with a radiator, the radiator is located in the second air duct, and the cold air entering the second air duct directly flows to the radiator;

[0009] A heat exchanger including a condensing part and an evaporating part; the condensing part is located in the first air duct, and the cold air entering the first air duct directly flows to the condensing part; the evaporating part is located in the closed cavity, and the evaporating part is located upstream of the high-heat module; and

[0010] A turbulence fan group is arranged in the closed cavity, and is used to form a circulating flow of air in the closed cavity.

[0011] In a possible implementation, a total air inlet is formed on the side plate of the cabinet body, and the air inlets of the first air duct and the second air duct are in communication with the total air inlet; the total air inlet is located below the heat dissipater and the heat exchanger.

[0012] In some embodiments, the closed cavity includes a direct-current cavity and an alternating-current cavity arranged in sequence along the front-rear direction of the cabinet body, and the air inlet ends of the first air duct and the second air duct are located in the alternating-current cavity; the total air inlet is formed on the side plate of the cabinet body corresponding to the alternating-current cavity.

[0013] In some embodiments, a wind guide cover is arranged on the side plate of the cabinet body corresponding to the total air inlet, and the lower end surface and the side end surface of the wind guide cover are both provided with an opening, the opening is located below the total air inlet, and the opening is in communication with the total air inlet.

[0014] In a possible implementation, the closed cavity includes a direct-current cavity and an alternating-current cavity arranged in sequence along the front-rear direction of the cabinet body, and the inner side of the side plate of the cabinet body corresponding to the alternating-current cavity is provided with a first sealing plate, and the first sealing plate and the side plate of the cabinet body enclose a first vertical sub-passage;

[0015] The first air duct includes the first vertical sub-passage and a first horizontal sub-passage in communication with the first vertical sub-passage, the first horizontal sub-passage is located above the high-heat-emitting module, and the air outlet of the first horizontal sub-passage is arranged on the side plate of the cabinet body corresponding to the direct-current cavity; and the condenser is located in the first horizontal sub-passage.

[0016] In some embodiments, the second air duct includes a second vertical sub-passage and a second horizontal sub-passage in communication with the second vertical sub-passage, and the second horizontal sub-passage is located above the first horizontal sub-passage.

[0017] The heat dissipater is located in the second vertical sub-passage.

[0018] A first air exhaust fan is arranged in the second horizontal sub-passage; the air outlet of the second horizontal sub-passage is arranged on the side plate of the cabinet body corresponding to the direct-current cavity, and / or the air outlet of the second horizontal sub-passage is arranged on the side plate of the cabinet body corresponding to the alternating-current cavity.

[0019] In a possible implementation, the closed cavity includes a direct-current cavity and an alternating-current cavity arranged in sequence along the front-rear direction of the cabinet body, and the high-heat-emitting module is arranged in the alternating-current cavity.

[0020] The power device group further includes:

[0021] The first low-heat-emitting module is arranged in the alternating current cavity and located between the upstream of the high-heat-emitting module and the downstream of the evaporation part.

[0022] The second low-heat-emitting module is arranged in the alternating current cavity and located downstream of the high-heat-emitting module.

[0023] The third low-heat-emitting module is arranged in the direct current cavity and located downstream of the second low-heat-emitting module and below the evaporation part.

[0024] In some embodiments, the turbulence fan group comprises:

[0025] The first fan is arranged on the air inlet side of the evaporation part and used for sending air to the evaporation part.

[0026] The second fan is arranged on the outer side of the third low-heat-emitting module and used for extracting hot air passing through the third low-heat-emitting module.

[0027] In some embodiments, the inner side of the cabinet side plate corresponding to the direct current cavity is provided with a second sealing plate, and the second sealing plate and the cabinet side plate enclose a third vertical sub-passage.

[0028] The air inlet of the third vertical sub-passage is in communication with the air outlet side of the second fan, and the air outlet of the third vertical sub-passage is in communication with the air inlet side of the first fan.

[0029] The hot air flowing through the third vertical sub-passage can be heat-exchanged through the cabinet side plate corresponding to the direct current cavity.

[0030] In some embodiments, the alternating current cavity is provided with a third air duct, and the third air duct is located in the lower half of the alternating current cavity and in communication with the outside.

[0031] The power device group further comprises a low-protection module arranged in the third air duct.

[0032] The electrical cabinet provided by the application has the following advantages compared with the prior art:

[0033] The power device group is placed in the closed cavity, so that the high sealing performance and high protection level of the power device group can be met.

[0034] The parallel distribution of the first air duct and the second air duct can make the condenser of the heat radiator and the heat exchanger respectively in the independent air ducts, so that the heat radiator and the condenser can respectively receive cold air to avoid the heat accumulation effect.

[0035] The air flow in the closed cavity forms a circulating flow by the air disturbance fan set, and the air flow is cooled after passing through the evaporation part of the heat exchanger, so that the local hot spot problem can be avoided, and the ring temperature of the closed cavity can be reduced;

[0036] The evaporation part is located upstream of the high heat generation module, and because the temperature at the evaporation part is low, the air flow becomes cold air after passing through the evaporation part, and the cold air carries away heat through the high heat generation module, further dissipating heat from the high heat generation module. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0038] Figure 1 The internal three-dimensional structure of the electrical cabinet provided by the embodiment of the present application Figure 1 (the left side plate of the cabinet is not shown in the figure);

[0039] Figure 2 The internal three-dimensional structure of the electrical cabinet provided by the embodiment of the present application Figure 2 (the left side plate and the rear side plate of the cabinet are not shown in the figure, and the left side plate of the first transverse sub-passage, the second transverse sub-passage and the third air duct is not shown);

[0040] Figure 3 The internal planar structure of the electrical cabinet provided by the embodiment of the present application Figure 1 (the arrows in the figure represent the direction of air flow in the first air duct, the second air duct and the third air duct);

[0041] Figure 4 The internal planar structure of the electrical cabinet provided by the embodiment of the present application Figure 2 (the arrows in the figure represent the direction of circulating air flow in the closed cavity).

[0042] In the figure:

[0043] 1, cabinet body; 11, first air duct; 111, first vertical sub-passage; 112, first transverse sub-passage; 12, second air duct; 121, second vertical sub-passage; 122, second transverse sub-passage; 13, total air inlet; 14, first sealing plate; 15, second sealing plate; 16, third vertical sub-passage; 17, third air duct; 18, air guide cover;

[0044] 21, high heat module; 22, first low heat module; 23, second low heat module; 24, third low heat module; 25, low protection module; 26, AC frame; 27, DC frame;

[0045] 3, heat exchanger; 31, condensing part; 32, evaporating part;

[0046] 41, first fan; 42, second fan;

[0047] 5, first exhaust fan. DETAILED DESCRIPTION

[0048] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0049] Please refer to Figures 1 to 4 , now the electrical cabinet provided by the present application will be described. The electrical cabinet comprises a cabinet body 1, a power device group, a heat exchanger 3 and a turbulence fan group. The cabinet body 1 has a closed cavity; a first air duct 11 and a second air duct 12 are arranged in the closed cavity; the first air duct 11 and the second air duct 12 are arranged in parallel; the power device is arranged in the closed cavity; the power device group comprises a high heat module 21, the high heat module 21 is connected with a radiator, the radiator is located in the second air duct 12, and the cold air entering the second air duct 12 directly passes to the radiator; the heat exchanger 3 comprises a condensing part 31 and an evaporating part 32; the condensing part 31 is located in the first air duct 11, and the cold air entering the first air duct 11 directly passes to the condensing part 31; the evaporating part 32 is located in the closed cavity, and the evaporating part 32 is located upstream of the high heat module 21; the turbulence fan group is arranged in the closed cavity, and is used for making the air flow in the closed cavity form a circulating flow.

[0050] The cabinet body 1 is a cuboid structure, which is composed of a front side plate, a rear side plate, a left side plate, a rear side plate, a top plate, a bottom plate, and a support frame connecting and supporting the above-mentioned plates. The cabinet body 1 has a closed cavity, which can be understood as that the above-mentioned six plates of the cabinet body 1 can enclose a closed cavity, or the above-mentioned six plates of the cabinet body 1 cooperate with other sealing plates in the cabinet body 1 to enclose a closed cavity. The closed cavity is not communicated with the outside, so that the closed cavity has high sealing performance and high protection level, which can make the electrical cabinet be applied in harsh environments such as high temperature, high humidity and high dust, and meet the use requirements of the power device group.

[0051] The power device group is generally a high protection level power device, such as the high heat generating module 21. The high heat generating module 21 not only has a large heat generation amount, but also has a high protection level. Therefore, the high heat generating module 21 is also a high protection module. The high heat generating module 21 is provided with a separate heat sink. The heat sink is arranged in close contact with the high heat generating module 21. The heat sink can take away the heat generated by the high heat generating module 21.

[0052] Specifically, the heat sink includes a plurality of spaced apart heat dissipation fins. The heat sink is generally a low protection level device. The heat sink does not need to be arranged in the closed cavity. In addition, the heat sink needs to be continuously supplied with cold air to absorb heat. Therefore, the heat sink is arranged in the second air duct 12. The second air duct 12 is in communication with the outside. The outside cold air is supplied into the second air duct 12 and directly blown to the heat sink to take away the heat of the high heat generating module 21.

[0053] Since the closed cavity is provided with the high heat generating module 21 and other low heat generating modules, only the high heat generating module 21 is cooled by the heat sink, and the other low heat generating modules are not cooled. This will cause the temperature of the closed cavity to rise, resulting in a local hot spot problem of the closed cavity and affecting the normal use of the power device group. Therefore, the heat exchanger 3 is further arranged in the embodiment.

[0054] Specifically, the heat exchanger 3 includes a condensing portion 31 and an evaporating portion 32. The condensing portion 31 is located in the first air duct 11. The evaporating portion 32 is located in the closed cavity. The first air duct 11 is in communication with the outside. The outside cold air is supplied into the first air duct 11 and directly blown to the condensing portion 31 to reduce the temperature of the condensing portion 31. The heat of the evaporating portion 32 is absorbed by heat exchange to reduce the temperature of the evaporating portion 32.

[0055] Preferably, the heat exchanger 3 in the embodiment is a phase change heat exchanger. The specific structure and heat exchange mode of the phase change heat exchanger belong to the prior art, and will not be described here.

[0056] The closed cavity is further provided with a turbulence fan group for forming a circulating flow of air in the closed cavity. The evaporating portion 32 is located upstream of the high heat generating module 21 based on the direction of the air flow. Since the temperature at the evaporating portion 32 is low, the air flow can be correspondingly reduced in temperature after passing through the evaporating portion 32 to become cold air. The cold air passes through the high heat generating module 21 to take away the heat and further cool the high heat generating module 21.

[0057] The specific heat dissipation form of the electrical cabinet provided in the embodiment is as follows:

[0058] The flow paths of the air flow in the first air duct 11 and the second air duct 12 are as follows: Figure 3As shown, the external cold wind enters the first air duct 11 from the air inlet of the first air duct 11 and directly enters the condensing part 31, and the external cold wind reduces the temperature of the condensing part 31, and the condensing part 31 exchanges heat with the evaporating part 32 to reduce the temperature of the evaporating part 32; the hot air passing through the condensing part 31 is discharged through the air outlet of the first air duct 11; at the same time, the external cold wind also enters the second air duct 12 from the air inlet of the second air duct 12 and directly enters the radiator to dissipate heat for the high-heat module 21.

[0059] Since the first air duct 11 and the second air duct 12 are arranged in parallel, the air inlets of both are external ring temperatures (i.e. the lowest temperature in the system), that is, there is no case that the external cold wind first cools the heat exchanger 3 and then cools the high-heat module 21, or the external cold wind first cools the high-heat module 21 and then cools the heat exchanger 3, and the radiator and the heat exchanger 3 are respectively in independent air ducts and can respectively receive cold air to avoid heat accumulation effect.

[0060] The flow path of the airflow in the closed cavity is as shown in Figure 4 As shown, the disturbance fan set makes the airflow in the closed cavity form a circulating flow, and since the evaporating part 32 of the heat exchanger 3 has a low temperature, the airflow reduces the temperature after passing through the evaporating part 32 and then passes through the high-heat module 21 to further dissipate heat for the high-heat module 21; in addition, the airflow sequentially passes through other low-heat modules during the circulating flow to take away the heat of the low-heat modules; since the airflow can form a circulating flow to continuously take away the heat of each heat module to avoid local hot spot problems; and the airflow also passes through the evaporating part 32, which can reduce the temperature of the high-temperature airflow to avoid the temperature of the circulating airflow increasing continuously to reduce the ring temperature of the closed cavity and improve the heat dissipation efficiency.

[0061] Compared with the prior art, the electrical cabinet provided by the application places the power device group in the closed cavity to meet the use requirements of high sealing performance and high protection level of the power device group; the first air duct 11 and the second air duct 12 are arranged in parallel to make the radiator and the heat exchanger 3 respectively in independent air ducts, and the radiator and the heat exchanger 3 can respectively receive cold air to avoid heat accumulation effect; the ventilation disturbance fan set makes the airflow in the closed cavity form a circulating flow, and the airflow is cooled after passing through the evaporating part 32 of the heat exchanger 3, and since the evaporating part 32 is located upstream of the high-heat module 21, the cold air passing through the evaporating part 32 can take away heat through the high-heat module 21 to further dissipate heat for the high-heat module 21; and the circulating airflow can not only avoid local hot spot problems but also reduce the ring temperature of the closed cavity.

[0062] In some embodiments, the cabinet 1, the first air duct 11 and the second air duct 12 can adopt the structure as shown in Figure 3 Figure 3 ​The side plate of the cabinet body 1 is provided with a total air inlet 13, the air inlets of the first air duct 11 and the second air duct 12 are communicated with the total air inlet 13; in the height direction of the cabinet body 1, the total air inlet 13 is located below the radiator and the heat exchanger 3.

[0063] Although the first air duct 11 and the second air duct 12 are distributed in parallel, the first air duct 11 and the second air duct 12 can share the same total air inlet 13, so that only one total air inlet 13 needs to be opened on the side plate of the cabinet body 1, thereby reducing the number of openings and reducing the interference of other external electrical equipment on the air inlet of the first air duct 11 and the second air duct 12.

[0064] The air outlets of the first air duct 11 and the second air duct 12 can share the same total air outlet, or can be independently arranged and not communicated with each other.

[0065] In addition, the total air inlet 13 is located below the radiator and the heat exchanger 3, that is, the first air duct 11 and the second air duct 12 both adopt the gas flow mode of lower air inlet and upper air outlet, and the height difference can prevent impurities such as rainwater and dust from entering the inside of the first air duct 11 and the second air duct 12, thereby avoiding the pollution of the teeth of the heat exchanger 3 and the teeth of the radiator by external impurities.

[0066] In some embodiments, the above-mentioned total air inlet 13 can adopt the structure as shown in Figure 1 , and as shown in Figure 1 , the side plate of the cabinet body 1 is provided with a wind deflector 18 corresponding to the total air inlet 13, the lower end face and the side end face of the wind deflector 18 are both provided with openings, the openings are located below the total air inlet 13 and communicated with the total air inlet 13.

[0067] The wind deflector 18 is protected outside the total air inlet 13, the top face of the wind deflector 18 is not opened, and impurities such as rainwater and dust can fall on the top face of the wind deflector 18 and flow downward along the wind deflector 18 to avoid entering the total air inlet 13, and the wind deflector 18 plays a role in further isolating impurities such as rainwater and dust.

[0068] The lower end face and the side end face of the wind deflector 18 are both provided with openings, and a plurality of openings are distributed and communicated with the total air inlet 13, which can increase the air inlet amount and guide the external cold air to quickly pass through the total air inlet 13.

[0069] In some embodiments, the above-mentioned cabinet body 1 and total air inlet 13 can also adopt the structures as shown in Figure 1 and Figure 2 , and as shown in Figure 1 and Figure 2 , the closed cavity includes a direct-current cavity and an alternating-current cavity which are sequentially distributed in the front-rear direction of the cabinet body 1, the air inlet end of the first air duct 11 and the air inlet end of the second air duct 12 are both located in the alternating-current cavity, and the total air inlet 13 is opened on the side plate of the cabinet body 1 corresponding to the alternating-current cavity.

[0070] The direct current cavity is used for placing a direct current power device, the alternating current cavity is used for placing an alternating current power device, the direct current power device is electrically connected with the alternating current power device, and therefore the electrical cabinet can be an energy storage and conversion cabinet. When the energy storage and conversion cabinet is applied in the whole energy storage system, the direct current power device is connected with a power device of a battery cabin through a wire harness, and the alternating current power device is connected with a power device of a transformer through a wire harness. Generally, the battery cabin, the energy storage and conversion cabinet and the transformer are sequentially distributed from front to back, and therefore, Figures 1 to 4 The front-rear direction of the electrical cabinet is defined, that is, the direct current cavity is in front and the alternating current cavity is in back.

[0071] In the prior art, the battery cabin is provided with an energy storage battery, the energy storage battery is a high-heat generating device, and generally needs to be ventilated and cooled, that is, an air inlet and an air outlet are arranged on the battery cabin to ventilate and cool the energy storage battery inside the battery cabin. Since the battery cabin will blow hot air, and the air outlet direction is different according to different installation environments, in order to avoid the hot air blown by the battery cabin from blowing to the total air inlet 13 of the electrical cabinet and affecting the incoming cold air, in the embodiment, the total air inlet 13 is arranged away from the battery cabin, that is, the total air inlet 13 is arranged on the side plate (that is, the rear side plate) of the cabinet 1 corresponding to the alternating current cavity, the total air inlet 13 faces the transformer and does not face the battery cabin, so that the hot air blown by the battery cabin can be prevented from entering the total air inlet 13 and affecting the air inlet temperature.

[0072] In some embodiments, the first air duct 11 can adopt a structure as shown in Figure 3 , referring to Figure 3 , the inner side of the side plate of the cabinet 1 corresponding to the alternating current cavity is provided with a first sealing plate 14, the first sealing plate 14 and the side plate of the cabinet 1 form a first vertical sub-channel 111; the first air duct 11 includes the first vertical sub-channel 111 and a first horizontal sub-channel 112 in communication with the first vertical sub-channel 111, the first horizontal sub-channel 112 is located above the high-heat generating module 21, and the air outlet of the first horizontal sub-channel 112 is arranged on the side plate of the cabinet 1 corresponding to the direct current cavity; the condensing part 31 is located in the first horizontal sub-channel 112.

[0073] In some embodiments, the first air duct 11 can adopt a structure as shown in Figure 3The front-rear direction in the cabinet is taken as a reference, the side plate of the cabinet 1 corresponding to the AC cavity is a rear side plate, a first sealing plate 14 is arranged in front of the rear side plate, and the first sealing plate 14 and the rear side plate of the cabinet 1 can form a first vertical sub-passage 111. The first vertical sub-passage 111 is in an air inlet-down and air outlet-up mode, and can avoid the upward flow of external dust, rainwater and other impurities. In addition, the first air duct 11 further includes a first horizontal sub-passage 112. On one hand, the first horizontal sub-passage 112 provides space for placing the condensing part 31. On the other hand, the first horizontal sub-passage 112 is vertically distributed with the first vertical sub-passage 111, the path of the first air duct 11 is increased, the first air duct 11 has a bending turning point, and the pollution of the condensing part 31 by external dust, rainwater and other impurities is further avoided.

[0074] Since the total air inlet 13 is located on the side plate (i.e., the rear side plate) of the cabinet 1 corresponding to the AC cavity, and in the air circulation flow direction of the closed cavity, the evaporating part 32 is located upstream of the high-heat-generation module 21, in order to ensure the straight flow of the air flow of the first air duct 11 and the straight-through of the condensing part 31, the air outlet of the first air duct 11 is only one, and is arranged on the side plate (i.e., the front side plate) of the cabinet 1 corresponding to the DC cavity.

[0075] It should be noted that a second air extraction fan can be arranged in the first horizontal sub-passage 112. The second air extraction fan is located on the air outlet side of the condensing part 31, and is used to increase the wind speed and the air volume, so that the cold air quickly passes through the condensing part 31.

[0076] In some embodiments, the above-mentioned second air duct 12 can adopt a structure as shown in Figure 3 , and as shown in Figure 3 , the second air duct 12 includes a second vertical sub-passage 121 and a second horizontal sub-passage 122 in communication with the second vertical sub-passage 121. The second horizontal sub-passage 122 is located above the first horizontal sub-passage 112. The heat sink is located in the second vertical sub-passage 121. The first air extraction fan 5 is arranged in the second horizontal sub-passage 122. The air outlet of the second horizontal sub-passage 122 is arranged on the side plate of the cabinet 1 corresponding to the DC cavity, and / or the air outlet of the second horizontal sub-passage 122 is arranged on the side plate of the cabinet 1 corresponding to the AC cavity.

[0077] The first air extraction fan 5 is aligned with the air outlet of the second vertical sub-passage 121, and is used to increase the wind speed and the air volume, so that the cold air quickly passes through the heat sink.

[0078] The second horizontal sub-passage 122 and the first horizontal sub-passage 112 are arranged in a vertical superposition and parallel mode, and are not in communication with each other. Preferably, the second horizontal sub-passage 122 and the first horizontal sub-passage 112 are located at the top of the cabinet 1, and no power device is arranged above the second horizontal sub-passage 122. In this way, the paths of the second vertical sub-passage 121 and the first vertical sub-passage 111 can be correspondingly increased, and the internal layout of the cabinet 1 can be optimized.

[0079] The second vertical sub-passage 121 and the first vertical sub-passage 111 are distributed along the front-rear direction of the cabinet 1, and it should be noted that the internal structure of the second vertical sub-passage 121 should be matched with the shape of the heat sink to be able to completely wrap the heat sink.

[0080] Since the heat sink is located in the second vertical sub-passage 121, the second vertical sub-passage 121 is lower air inlet and upper air outlet, the airflow direction is determined, and the airflow can directly pass to the heat sink, and after the airflow enters the second horizontal sub-passage 122, in order to increase the flow rate and flow, the airflow can be diffused forward and backward, so the air outlet of the second horizontal sub-passage 122 can be opened on the front side plate of the cabinet 1, and can also be opened on the rear side plate of the cabinet 1.

[0081] In some embodiments, the power device group described above can adopt the structure as shown in Figure 1 、 Figure 2 and Figure 4 , see Figure 1 、 Figure 2 and Figure 4 , the power device group further comprises a first low heat generation module 22, a second low heat generation module 23, and a third low heat generation module 24. Among them, the high heat generation module 21 is arranged in the alternating current cavity; the first low heat generation module 22 is arranged in the alternating current cavity and located between the upstream of the high heat generation module 21 and the downstream of the evaporation part 32; the second low heat generation module 23 is arranged in the alternating current cavity and located downstream of the high heat generation module 21; the third low heat generation module 24 is arranged in the direct current cavity and located downstream of the second low heat generation module 23 and below the evaporation part 32.

[0082] It should be noted that the high heat generation module 21 has the largest heat generation, corresponding to the energy storage converter cabinet, the high heat generation module 21 is an inverter module, the inverter module is an alternating current device, and is arranged in the alternating current cavity. The first low heat generation module 22 and the second low heat generation module 23 are also alternating current devices, and the heat generation of the first low heat generation module 22 is less than that of the second low heat generation module 23. The third low heat generation module 24 is a direct current device, arranged in the direct current cavity, and the heat generation of the third low heat generation module 24 is greater than that of the second low heat generation module 23.

[0083] Specifically, the heat generation of the first low heat generation module 22, the second low heat generation module 23 and the third low heat generation module 24 increases in turn, and the temperature resistance also increases in turn, so the first low heat generation module 22, the second low heat generation module 23 and the third low heat generation module 24 are arranged in turn in the air circulation flow direction in the closed cavity. The third low heat generation module 24 with the largest heat generation is located at the end of the air circulation flow, and the first low heat generation module 22 with the smallest heat generation is located at the beginning of the air circulation flow, so the temperature of the air circulation flow gradually increases and does not suddenly increase when flowing through a power device to affect the heat dissipation of the next power device.

[0084] In addition, the arrangement of the high heat generation module 21, the first low heat generation module 22, the second low heat generation module 23 and the third low heat generation module 24 also meets the use requirements of the energy storage converter cabinet for direct current input and alternating current output. The series connection structure of the direct current device and the alternating current device is in the shape of several characters by using the above arrangement, which not only meets the safety distance, but also makes the power device group arrangement compact and optimizes the internal layout of the cabinet 1.

[0085] Further, the downstream of the heat exchanger 3 is the first low heat generation module 22 (alternating current device), the upstream of the heat exchanger 3 is the third low heat generation module 24 (direct current device), and the heat exchanger 3 is located between the direct current device and the alternating current device, which can better balance the heat dissipation of each heat generation module.

[0086] In some embodiments, the above turbulence fan group can adopt the structure as shown in Figure 3 and Figure 4 , which will be described below. Figure 3 and Figure 4 The turbulence fan group includes a first fan 41 and a second fan 42. The first fan 41 is arranged on the air inlet side of the evaporation part 32 and is used to send air to the evaporation part 32; the second fan 42 is arranged on the outer side of the third low heat generation module 24 and is close to the front side plate of the cabinet 1, and is used to extract hot air passing through the third low heat generation module 24.

[0087] The first fan 41 is a supply fan for making the air flow passing through the evaporation part 32 flow quickly downstream. The second fan 42 is an exhaust fan for extracting air flow, so that the lower space of the cabinet 1 forms a negative pressure, so that the air flow passing through the high heat generation module 21 and the first low heat generation module 22 flows downward and passes through the second low heat generation module 23 and the third low heat generation module 24 in turn; and the heated air flows upward and is guided to the evaporation part 32 for heat exchange under the turbulence of the first fan 41.

[0088] Since the third low heat generation module 24 has a large heat generation, the second fan 42 is arranged on the outer side of the third low heat generation module 24 to extract air, which can achieve more accurate heat dissipation.

[0089] The air flow in the closed cavity is circulated by the first fan 41 and the second fan 42, so that the number of fans is reduced and the internal layout of the cabinet 1 is optimized.

[0090] Please refer to Figure 3 and Figure 4 , the air flow direction in the second transverse sub-passage 122 is from back to front, that is, the air flow passes through the condensing part 31 from back to front; the air flow direction in the upper half of the closed cavity is from front to back, that is, the air flow passes through the evaporating part 32 from front to back. The condensing part 31 and the evaporating part 32 adopt counter-flow heat exchange form, the heat exchange temperature difference is larger, and the heat exchange efficiency is higher.

[0091] In some embodiments, the cabinet 1 described above can also adopt the structure as shown in Figure 2 , Figure 3 and Figure 4 , please refer to Figure 2 , Figure 3 and Figure 4 , the inner side of the side plate of the cabinet 1 corresponding to the straight-through cavity is provided with a second sealing plate 15, the second sealing plate 15 and the side plate of the cabinet 1 enclose a third vertical sub-passage 16; the air inlet of the third vertical sub-passage 16 is in communication with the air outlet side of the second fan 42; the air outlet of the third vertical sub-passage 16 is in communication with the air inlet side of the first fan 41; the hot air flowing through the third vertical sub-passage 16 can be heat exchanged through the side plate of the cabinet 1 corresponding to the straight-through cavity.

[0092] With Figure 2 the direction as the reference, the second sealing plate 15 is located behind the front side plate of the cabinet 1, and the third vertical sub-passage 16 can be formed by means of the second sealing plate 15 and the front side plate of the cabinet 1, the third vertical sub-passage 16 is lower in air inlet and upper in air outlet, which conforms to the natural tendency of hot air flowing upward.

[0093] Specifically, please refer to Figure 4 , the circulating air flow in the closed cavity can be divided into two groups, wherein the first circulation is that the first fan 41 sends air, so that the air flow passing through the evaporating part 32 flows quickly to the first low heat generating module 22 and the high heat generating module 21. The second fan 42 draws air, so that the lower space of the cabinet 1 forms a negative pressure, so that the air flow passing through the high heat generating module 21 and the first low heat generating module 22 flows downward and passes through the second low heat generating module 23, the third low heat generating module 24 in turn. Part of the heated air flows upward and is guided to the evaporating part 32 for heat exchange under the disturbance of the first fan 41.

[0094] The second cycle is: the first fan 41 sends air, so that the air flow passing through the evaporating part 32 quickly flows to the first low heat generating module 22 and the high heat generating module 21. The second fan 42 draws air, so that the lower space of the cabinet 1 forms a negative pressure, so that the air flow passing through the high heat generating module 21 and the first low heat generating module 22 flows downward and sequentially passes through the second low heat generating module 23 and the third low heat generating module 24. The second fan 42 sends part of the heated air into the third vertical sub-passage 16, and the air flow passes through the third vertical sub-passage 16 and is guided to the evaporating part 32 for heat exchange.

[0095] Since the front side plate of the cabinet 1 directly faces the outside world, the air flow can transfer heat outward through the front side plate when passing through the third vertical sub-passage 16, so as to reduce the temperature of the air flow guided to the evaporating part 32, and correspondingly improve the heat exchange efficiency of the heat exchanger 3.

[0096] It should be noted that a direct-flow frame 27 is further arranged in the direct-flow cavity, above the third low heat generating module 24 and at the air outlet of the third vertical sub-passage 16. The heat generating amount of the direct-flow frame 27 is less than that of the third low heat generating module 24, and the temperature resistance of the direct-flow frame 27 is lower than that of the third low heat generating module 24. The air flow passing through the third vertical sub-passage 16 is cooled by the front side plate of the cabinet 1, and then is blown to the direct-flow frame 27 with lower heat generating amount and lower temperature resistance.

[0097] In addition, an alternating current cavity is further provided with an alternating current frame 26, which is located above the second low heat generating module 23. The heat generating amount of the alternating current frame 26 is less than that of the second low heat generating module 23, and the temperature resistance of the alternating current frame 26 is lower than that of the second low heat generating module 23.

[0098] In some embodiments, the above-mentioned power device group can also adopt the structure as shown in Figure 1 and Figure 2 , referring to Figure 1 and Figure 2 , an alternating current cavity is provided with a third air duct 17, which is located in the lower half of the alternating current cavity and is in communication with the outside world; the power device group further includes a low protection module 25 arranged in the third air duct 17.

[0099] The low protection module 25 is generally a module with large volume and heavy weight, and its heat generating amount is usually large, but the protection requirement is not high, and the low protection module 25 does not need to be placed in the closed cavity. The low protection module 25 is placed at the bottom of the cabinet 1, and the third air duct 17 is arranged outside the low protection module 25, so as to reasonably utilize the bearing structure of the entire cabinet 1 and increase the stability of the low protection module 25 in the cabinet 1.

[0100] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrical cabinet, characterized in that The application relates to a cabinet body (1) with a closed cavity, wherein a first air duct (11) and a second air duct (12) are arranged in the closed cavity; the first air duct (11) and the second air duct (12) are arranged in parallel; a power device group is arranged in the closed cavity; the power device group comprises a high-heat-emitting module (21), the high-heat-emitting module (21) is connected with a radiator, the radiator is arranged in the second air duct (12), and cold air entering the second air duct (12) directly flows to the radiator; a heat exchanger (3) comprises a condensing part (31) and an evaporating part (32); the condensing part (31) is arranged in the first air duct (11), and cold air entering the first air duct (11) directly flows to the condensing part (31); the evaporating part (32) is arranged in the closed cavity, and the evaporating part (32) is arranged upstream of the high-heat-emitting module (21); and a turbulence fan group is arranged in the closed cavity and is used for forming circulating flow of air in the closed cavity. The first air duct (11) comprises a first vertical sub-channel (111) and a first horizontal sub-channel (112) communicated with the first vertical sub-channel (111), the first horizontal sub-channel (112) is arranged above the high-heat-emitting module (21), and the condensing part (31) is arranged in the first horizontal sub-channel (112). The second air duct (12) comprises a second vertical sub-channel (121) and a second horizontal sub-channel (122) communicated with the second vertical sub-channel (121), the second horizontal sub-channel (122) is arranged above the first horizontal sub-channel (112), and the radiator is arranged in the second vertical sub-channel (121). A total air inlet (13) is arranged on the side plate of the cabinet body (1), the air inlets of the first air duct (11) and the second air duct (12) are communicated with the total air inlet (13), and the total air inlet (13) is arranged below the radiator and the heat exchanger (3). The closed cavity comprises a direct-current cavity and an alternating-current cavity arranged in sequence along the front-rear direction of the cabinet body (1), the air inlet ends of the first air duct (11) and the second air duct (12) are arranged in the alternating-current cavity, and the total air inlet (13) is arranged on the side plate of the cabinet body (1) corresponding to the alternating-current cavity. A wind guide cover (18) is arranged on the side plate of the cabinet body (1) corresponding to the total air inlet (13), the lower end surface and the side end surface of the wind guide cover (18) are provided with openings, the openings are arranged below the total air inlet (13) and are communicated with the total air inlet (13). The closed cavity comprises a direct-current cavity and an alternating-current cavity arranged in sequence along the front-rear direction of the cabinet body (1), the inner side of the side plate of the cabinet body (1) corresponding to the alternating-current cavity is provided with a first sealing plate (14), and the first sealing plate (14) and the side plate of the cabinet body (1) enclose the first vertical sub-channel (111).

2. The electrical cabinet of claim 1, wherein, ​ 3. The electrical cabinet of claim 2, wherein, ​ 4. The electrical cabinet of claim 2, wherein, ​ 5. The electrical cabinet of claim 1, wherein, ​ The air outlet of the first transverse sub-channel (112) is arranged on the side plate of the cabinet (1) corresponding to the direct-current cavity.

6. The electrical cabinet of claim 5, wherein, The second transverse sub-channel (122) is provided with a first air exhaust fan (5); the air outlet of the second transverse sub-channel (122) is arranged on the side plate of the cabinet (1) corresponding to the direct-current cavity, and / or the air outlet of the second transverse sub-channel (122) is arranged on the side plate of the cabinet (1) corresponding to the alternating-current cavity.

7. The electrical cabinet of claim 1, wherein, The closed cavity comprises a direct-current cavity and an alternating-current cavity arranged in sequence in the front-rear direction of the cabinet (1), and the high-heat-emitting module (21) is arranged in the alternating-current cavity; The power device group further comprises: A first low-heat-emitting module (22) arranged in the alternating-current cavity and located between the upstream of the high-heat-emitting module (21) and the downstream of the evaporation part (32); A second low-heat-emitting module (23) arranged in the alternating-current cavity and located downstream of the high-heat-emitting module (21); and A third low-heat-emitting module (24) arranged in the direct-current cavity and located downstream of the second low-heat-emitting module (23) and below the evaporation part (32).

8. The electrical cabinet of claim 7, wherein, The turbulence fan group comprises: A first fan (41) arranged on the air inlet side of the evaporation part (32) and used for supplying air to the evaporation part (32); and A second fan (42) arranged on the outside of the third low-heat-emitting module (24) and used for extracting hot air passing through the third low-heat-emitting module (24).

9. The electrical cabinet of claim 8, wherein, The inside of the side plate of the cabinet (1) corresponding to the direct-current cavity is provided with a second sealing plate (15), and the second sealing plate (15) and the side plate of the cabinet (1) enclose a third vertical sub-channel (16); The air inlet of the third vertical sub-channel (16) is in communication with the air outlet side of the second fan (42); and the air outlet of the third vertical sub-channel (16) is in communication with the air inlet side of the first fan (41); The hot air flowing through the third vertical sub-channel (16) exchanges heat through the side plate of the cabinet (1) corresponding to the direct-current cavity.

10. The electrical cabinet of claim 7, wherein, The alternating-current cavity is provided with a third air duct (17), and the third air duct (17) is located in the lower half of the alternating-current cavity and is in communication with the outside; The power device group further comprises a low-protection module (25) arranged in the third air duct (17).

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