Energy storage inverter cabinet

Abstract

The invention provides an energy storage inverter cabinet, which belongs to the technical field of electrical equipment and comprises a cabinet body, a heat exchanger and a component group. The cabinet body is provided with a closed cavity; a first ventilation air duct is arranged at the upper half part of the closed cavity, and a radiator is arranged in the first ventilation air duct; the heat exchanger comprises an evaporation part and a condensation part; the evaporation part is located in the first ventilation air duct; the air inlet side of the condensation part is close to the rear side plate of the cabinet body; the component group comprises an inversion module and a first low heating device; the inversion module is arranged at the upper half part of the closed cavity and is attached to the radiator; the first low-heating device is arranged on the lower half portion of the closed cavity and located on the downstream of the air outlet side of the condensation part. The evaporation part is located in the first ventilation air duct, so that external impurities can be prevented from entering the first ventilation air duct to cause blockage of the evaporation part; the inversion module is mainly radiated by the radiator, and the first low heating device can be radiated by cold air passing through the condensation part, so that the radiating efficiency of the component group is ensured, and the problem of local hot spots is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical equipment, and more specifically, relates to an energy storage inverter cabinet. Background Art

[0002] Energy storage inverters are devices that convert DC power into AC power. They are mainly used in energy storage devices in photovoltaic, wind and nuclear power generation systems. Energy storage inverters usually include power devices such as inverter modules, reactance modules and capacitor bus modules. Since some energy storage inverters are usually used in harsh environments such as high temperature, high humidity and high dust, in order to protect the power devices inside, the cabinet is required to have high sealing performance and high protection level, so only closed heat dissipation can be used inside the cabinet.

[0003] In the prior art, in order to improve the heat dissipation efficiency of the power devices inside the cabinet, an air-to-air heat exchanger is installed on the door panel of the cabinet. Part of the air-to-air heat exchanger is located inside the cabinet, and the other part is located outside the cabinet. The air-to-air heat exchanger is used to form heat conduction to remove the heat inside the cabinet. However, the air-to-air heat exchanger is installed on the door panel of the cabinet, which can easily cause the heat exchange core and the external circulation fan to become dirty or even damaged, resulting in a high maintenance frequency; and for cabinets with larger spaces, there will be local hot spots, resulting in poor overall heat dissipation effect of the cabinet. Summary of the invention

[0004] The object of the present invention is to provide an energy storage inverter cabinet, aiming to solve the technical problems existing in the prior art of poor heat dissipation inside the cabinet and high cabinet maintenance frequency.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide an energy storage inverter cabinet, comprising:

[0006] The cabinet has a closed cavity; the upper half of the closed cavity is provided with a first ventilation duct, the first ventilation duct is connected to the outside; a radiator is also provided in the first ventilation duct;

[0007] The heat exchanger comprises an evaporation part and a condensation part; the evaporation part is located in the first ventilation duct; the condensation part is arranged in the closed cavity and below the first ventilation duct, and the air inlet end of the condensation part is close to the rear side plate of the cabinet;

[0008] A component group, including an inverter module and a first low-heat-generating device; the inverter module is arranged in the upper half of the closed cavity and is arranged in close contact with the radiator; the first low-heat-generating device is arranged in the lower half of the closed cavity and is located downstream of the air outlet side of the condensing part;

[0009] Wherein, the airflow in the closed cavity forms a circulating flow based on the condensation part.

[0010] In a possible implementation, the closed cavity includes a DC cavity and an AC cavity sequentially distributed along the front-to-back direction of the cabinet; the condensing part is located in the AC cavity;

[0011] The first low-heat-generating device includes a first AC device and a first DC device, the first AC device is located in the lower half of the AC cavity, and the first DC device is located in the lower half of the DC cavity;

[0012] Among them, a first fan is provided on the air outlet side of the condensation part, and the first fan is used to supply air to the lower half of the closed cavity; a second fan is provided in front of the first DC device, and the second fan is used to extract the airflow passing through the first DC device.

[0013] In some embodiments, the inverter module is located in the upper half of the AC cavity;

[0014] The component group further includes a second DC device, which is located in the upper half of the DC cavity;

[0015] A third fan is provided in the closed cavity. The third fan is located downstream and rearward of the second DC device. The third fan is used to extract hot air passing through the second DC device and pass it to the condensation part.

[0016] In some embodiments, a fourth fan is further provided in the closed cavity, wherein the air inlet end of the fourth fan faces the air outlet end of the first fan, and the air outlet end faces the second DC device and the first DC device, and the fourth fan is used to supply air to the second DC device and the first DC device.

[0017] In some embodiments, the component group further includes a second AC device, and the second AC device is located in the upper half of the AC cavity and in front of and upstream of the inverter module.

[0018] In some embodiments, a second ventilation duct is provided in the lower half of the AC cavity, and the second ventilation duct is located in front of the first AC device; the fourth fan is located directly above the second ventilation duct; and the component group also includes a low protection module arranged in the second ventilation duct.

[0019] In some embodiments, a sealing plate is provided on the inner side of the front side plate of the cabinet, and the sealing plate and the front side plate of the cabinet form a vertical channel; the air inlet of the vertical channel is connected to the air outlet of the second fan, and the air outlet faces the second DC device;

[0020] The hot air flowing through the vertical channel can exchange heat through the front side plate of the cabinet.

[0021] In a possible implementation, the inverter modules are provided with multiple phases at intervals, and each phase of the inverter modules is respectively connected with a heat sink;

[0022] The first ventilation duct includes a first duct and a second duct corresponding to the plurality of radiators one by one; the evaporation portion is located in the first duct, and the radiator is located in the corresponding second duct;

[0023] The first air duct covers the air inlets of each of the second air ducts, and in the spacing direction of the multi-phase inverter modules, both ends of the evaporation portion extend to below the air inlets of two of the second air ducts located on both sides.

[0024] In some embodiments, the heat exchanger further includes a heat exchange pipeline, and the heat exchange pipeline connects the evaporation part and the condensation part.

[0025] In some embodiments, there is a wind gap between the evaporation portion and the air inlets of the plurality of second air ducts, and part of the cold air passing through the first air duct directly flows into the wind gap and enters each of the second air ducts.

[0026] The beneficial effects of the energy storage inverter cabinet provided by the present invention are: compared with the prior art, it has the following effects:

[0027] Placing the component group in a closed cavity can meet the requirements of high sealing performance and high protection level of the cabinet;

[0028] The evaporation parts of the radiator and the heat exchanger are both located in the first ventilation duct, and the first ventilation duct is located in the closed cavity, which can increase the air inlet path of the evaporation part, prevent external impurities such as rainwater and dust from entering the first ventilation duct and causing blockage of the evaporation part, and there is no need to set up an external circulation fan, thereby reducing the maintenance frequency;

[0029] The inverter module and the first low heat generation device are respectively arranged in the upper and lower halves of the closed cavity, which optimizes the spatial layout of the closed cavity; the inverter module is mainly cooled by the radiator; the first low heat generation device is located on the air outlet side of the condensation part. Since the airflow in the closed cavity can form a circulating flow based on the condensation part, the first low heat generation device can be cooled by the cold air passing through the condensation part, thereby ensuring the heat dissipation efficiency of the component group in the closed cavity and avoiding local hot spot problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Schematic diagram of the internal three-dimensional structure of the energy storage inverter cabinet provided in the embodiment of the present invention Figure 1 (The left side panel of the cabinet is not shown in the figure);

[0032] Figure 2 Schematic diagram of the internal three-dimensional structure of the energy storage inverter cabinet provided in the embodiment of the present invention Figure 2 (The left side panel and rear side panel of the cabinet are not shown in the figure);

[0033] Figure 3 Schematic diagram of the internal plan structure of the energy storage inverter cabinet provided in an embodiment of the present invention Figure 1 (The arrows in the figure indicate the direction of the air circulation in the closed cavity);

[0034] Figure 4 Schematic diagram of the internal plan structure of the energy storage inverter cabinet provided in an embodiment of the present invention Figure 2 (The arrows in the figure indicate the direction of air flow in the ventilation duct);

[0035] Figure 5 for Figure 2 Side view of

[0036] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at the center circle A.

[0037] In the figure:

[0038] 1. Cabinet; 11. Enclosed cavity; 12. Closing plate; 13. Vertical channel; 14. Air guide cover;

[0039] 2. First ventilation duct; 21. First duct; 22. Second duct; 23. Third duct; 24. Wind gap;

[0040] 3. Heat exchanger; 31. Evaporation part; 32. Condensation part; 33. Heat exchange pipeline;

[0041] 41. Inverter module; 42. First AC device; 43. First DC device; 44. Second DC device; 45. Second AC device; 46. Low protection module;

[0042] 51, first fan; 52, second fan; 53, third fan; 54, fourth fan;

[0043] 6. Second ventilation duct. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Please also read Figures 1 to 5 , the energy storage inverter cabinet provided by the present invention is now described. The energy storage inverter cabinet includes a cabinet 1, a heat exchanger 3 and a component group; the cabinet 1 has a closed cavity 11; the upper half of the closed cavity 11 is provided with a first ventilation duct 2, and the first ventilation duct 2 is connected to the outside; a radiator is also provided in the first ventilation duct 2; the heat exchanger 3 includes an evaporation part 31 and a condensation part 32; the evaporation part 31 is located in the first ventilation duct 2; the condensation part 32 is arranged in the closed cavity 11 and is located below the first ventilation duct 2, and the air inlet side of the condensation part 32 is close to the rear side plate of the cabinet 1; the component group includes an inverter module 41 and a first low-heat device; the inverter module 41 is arranged in the upper half of the closed cavity 11 and is arranged in contact with the radiator; the first low-heat device is arranged in the lower half of the closed cavity 11 and is located downstream of the air outlet side of the condensation part 32; wherein the airflow in the closed cavity 11 forms a circulating flow with the condensation part 32 as a reference.

[0046] The cabinet 1 is a rectangular parallelepiped structure, which is composed of a front side panel, a rear side panel, a left side panel, a rear side panel, a top panel, a bottom panel, and a support frame connecting and supporting the above panels. The cabinet 1 has a closed cavity 11, which can be understood as the above six panels of the cabinet 1 can enclose the closed cavity 11, or the above six panels of the cabinet 1 cooperate with other sealing panels 12 in the cabinet 1 to enclose the closed cavity 11. The closed cavity 11 is not connected to the outside world, so that the closed cavity 11 has high sealing performance and high protection level, which can enable the electrical cabinet to be used in harsh environments such as high temperature, high humidity, and high dust, and meet the use requirements of the component group.

[0047] It should be noted that the above-mentioned limitations on the front, back, left, right, up and down directions are based on the front door panel of the cabinet 1 after installation. Generally, the cabinet 1 is provided with a front door panel (i.e., a front side panel), which can be opened to maintain the components in the closed cavity 11. An operation panel is also provided on the front door panel.

[0048] The component group is generally a high-protection level device. The inverter module 41 not only generates a large amount of heat, but also has a high protection level. Therefore, the inverter module 41 is also a high-protection module. The inverter module 41 is equipped with a separate radiator, which is fitted to the inverter module 41 and can take away the heat generated by the inverter module 41.

[0049] Specifically, the radiator includes a plurality of heat dissipation fins arranged at intervals. The radiator is generally a low protection level device and does not need to be arranged in the closed cavity 11. Moreover, the radiator needs to continuously pass cold air to absorb heat. Therefore, the radiator is arranged in the first ventilation duct 2. The first ventilation duct 2 is connected to the outside. The cold air from the outside enters the first ventilation duct 2 and blows directly to the radiator to take away the heat of the inverter module 41. It should be noted that since the radiator is located inside the first ventilation duct 2, the position and structure of the radiator are not shown in the attached drawings.

[0050] In addition to the inverter module 41, other low-heat-generating devices, such as the first low-heat-generating device, are also installed in the closed cavity 11. If only the radiator is used to dissipate heat from the inverter module 41, while other low-heat-generating devices are not used to dissipate heat, the ambient temperature of the closed cavity 11 will rise, causing local hot spots in the closed cavity 11, thus affecting the normal use of the power device group. Therefore, the present embodiment further provides a heat exchanger 3.

[0051] Specifically, the heat exchanger 3 includes an evaporation part 31 and a condensation part 32. The evaporation part 31 is located in the first ventilation duct 2, and the condensation part 32 is located in the closed cavity 11. The first ventilation duct 2 is connected to the outside. The cold air from the outside enters the first ventilation duct 2 and blows directly to the evaporation part 31 to reduce the temperature of the evaporation part 31, and absorbs the heat of the condensation part 32 by heat exchange to reduce the temperature of the condensation part 32. After passing through the condensation part 32, the airflow can reduce the temperature and become cold air.

[0052] Preferably, the heat exchanger 3 in this embodiment is a phase change heat exchanger 3. The specific structure and specific heat exchange method of the phase change heat exchanger 3 belong to the prior art and will not be described in detail here.

[0053] The airflow in the closed cavity 11 can form a circulating flow based on the condensation part 32. Since the temperature of the condensation part 32 of the heat exchanger 3 is low, the temperature of the airflow is reduced after passing through the condensation part 32, and then passes through the first low-heat-generating device to take away the heat of the first low-heat-generating device. Since the airflow can form a circulating flow, it continuously takes away the heat of the first low-heat-generating device, thereby avoiding the problem of local hot spots. Moreover, the condensation part 32 can cool the high-temperature airflow to avoid the continuous increase in the temperature of the circulating gas, so as to reduce the ambient temperature of the closed cavity 11 and improve the heat dissipation efficiency.

[0054] Compared with the prior art, the energy storage inverter cabinet provided by the present invention places the component group in the closed cavity 11, which can meet the use requirements of the cabinet with high sealing performance and high protection level;

[0055] The evaporation part 31 of the radiator and the heat exchanger 3 are both located in the first ventilation duct 2, and the first ventilation duct 2 is located in the closed cavity 11, which can increase the air inlet path of the evaporation part 31, prevent external impurities such as rainwater and dust from entering the first ventilation duct 2 and causing the evaporation part 31 to be blocked, and no external circulation fan is required, thereby reducing the maintenance frequency;

[0056] The inverter module 41 and the first low heat generating device are respectively arranged in the upper and lower halves of the closed cavity 11, which optimizes the spatial layout of the closed cavity 11; the inverter module 41 is mainly cooled by the radiator; the first low heat generating device is located on the air outlet side of the condensation section 32. Since the airflow in the closed cavity 11 can form a circulating flow based on the condensation section 32, the first low heat generating device can be cooled by the cold air passing through the condensation section 32, thereby ensuring the heat dissipation efficiency of the component group in the closed cavity 11 and avoiding local hot spot problems.

[0057] In some embodiments, the first low heat generating device and the closed cavity 11 can be formed as follows: Figures 1 to 3 The structure shown, see Figures 1 to 3 The closed cavity 11 includes a DC cavity and an AC cavity sequentially distributed along the front-to-back direction of the cabinet 1; the condensation part 32 is located in the AC cavity; the first low-heat device includes a first AC device 42 and a first DC device 43, the first AC device 42 is located in the lower half of the AC cavity, and the first DC device 43 is located in the lower half of the DC cavity; wherein, a first fan 51 is provided on the air outlet side of the condensation part 32, and the first fan 51 is used to supply air to the lower half of the closed cavity 11; a second fan 52 is provided in front of the first DC device 43, and the second fan 52 is used to extract hot air passing through the first DC device 43.

[0058] The DC cavity is used to place DC power devices, and the AC cavity is used to place AC power devices. The DC power devices are electrically connected to the AC power devices. When the energy storage inverter cabinet is used in the entire energy storage system, the DC power devices are connected to the power devices in the battery compartment through a wiring harness, and the AC power devices are connected to the power devices in the transformer through a wiring harness. Usually, the battery compartment, energy storage inverter cabinet, and transformer are distributed from front to back. Therefore, Figures 1 to 4 The front-to-back direction of the cabinet 1 is defined in the figure, that is, the DC cavity is in the front and the AC cavity is in the back.

[0059] The first AC device 42 is located in the lower half of the AC cavity, and the first DC device 43 is located in the lower half of the DC cavity. The first AC device 42 and the first DC device 43 are electrically connected, and basically fill the lower half of the closed cavity 11. Specifically, the first AC device 42 is located at the air outlet side of the condensation part 32, and the first DC device 43 is located in front of the first AC device 42.

[0060] The first fan 51 is an air supply fan. The air inlet end of the first fan 51 is in contact with the air outlet side of the condensation portion 32, and the air outlet end of the first fan 51 faces the front side plate of the cabinet 1. Figure 3 The airflow passing through the condensation part 32 is cooled by the condensation part 32 and becomes cold air. The first fan 51 simultaneously delivers the cold air to the lower half of the closed cavity 11, that is, to the first AC device 42; the cold air passes through the first AC device 42, thereby taking away its heat.

[0061] The second fan 52 is an exhaust fan. The second fan 52 is arranged in close contact with the front side plate of the cabinet 1, and its air inlet end faces the rear side plate of the cabinet 1, and is used to extract the airflow passing through the first DC device 43. Since the first AC device 42 is a low-heat-generating device, the temperature rise of the cold air after passing through it is limited, and after passing through the first DC device 43 again, it can still take away the heat of the first DC device 43. The second fan 52 cooperates with the first fan 51 to increase the air volume, so that the cold air quickly passes through the first AC device 42 and the first DC device 43, so as to improve the heat dissipation efficiency of the first low-heat-generating device.

[0062] Preferably, the heat generated by the first AC device 42 is smaller than the heat generated by the first DC device 43 .

[0063] The first low-heat device is located in the lower half of the closed cavity 11, and the cold air passing through the condensation part 32 will naturally flow downward and pass through the first AC device 42; the first fan 51 cooperates with the second fan 52 to make the air flow forward and pass through the first DC device 43. The temperature of the cold air increases after passing through the first DC device 43. According to the natural upward flow trend of hot air, the air flow will naturally rise to the front upper half of the closed cavity 11, and finally flow back to the condensation part 32 for cooling.

[0064] In some embodiments, the above component group can also be used as follows Figures 1 to 3 The structure shown, see Figures 1 to 3 The inverter module 41 is located in the upper half of the AC cavity; the component group also includes a second DC device 44, which is located in the upper half of the DC cavity; a third fan 53 is provided in the closed cavity 11, and the third fan 53 is located at the rear downstream of the second DC device 44. The third fan 53 is used to extract the hot air passing through the second DC device 44 and pass it to the condensation part 32.

[0065] The inverter module 41 is an AC device, so the inverter module 41 is located in the upper half of the AC cavity; in order to rationally utilize the space in the upper half of the closed cavity 11, a second DC device 44 is also provided in the upper half of the DC cavity. The second DC device 44 is also a low-heat device. The second DC device 44 is electrically connected to the first DC device 43 and is distributed in the up and down directions, thereby optimizing the device layout and cable layout in the DC cavity.

[0066] Moreover, according to the principle of aerodynamics, the airflow passing through the first DC device 43 will flow upward and then pass through the second DC device 44 to take away the heat and dissipate the heat.

[0067] In addition, a third fan 53 is provided downstream of the rear of the second DC device 44, with the air inlet end of the third fan 53 facing the front side plate of the cabinet 1 and the air outlet end facing the condensation part 32. The third fan 53 is used to extract the airflow passing through the DC cavity upward and transport it backward to the condensation part 32 for heat exchange.

[0068] The first fan 51, the second fan 52 and the third fan 53 cooperate to form a forward-upward-backward-downward circulation flow of the airflow, so that the airflow is continuously cooled through the condensation part 32, so as to reduce the ambient temperature of the closed cavity 11 and improve the heat dissipation efficiency.

[0069] In some embodiments, the above-mentioned air circulation flow can also be adopted as follows Figure 3 The structure shown, see Figure 3 A fourth fan 54 is further provided in the closed cavity 11, the air inlet end of the fourth fan 54 faces the air outlet end of the first fan 51, and the air outlet end faces the second DC device 44 and the first DC device 43, and the fourth fan 54 is used to supply air to the second DC device 44 and the first DC device 43.

[0070] In the front-to-back direction of the cabinet 1, the fourth fan 54 is located between the first fan 51 and the second fan 52, and is used to extract the cold air passing through the first fan 51. In this way, part of the cold air output by the first fan 51 can pass downward through the first AC device 42, and part of the cold air can directly pass through the first DC device 43 and the second DC device 44. Compared with the method in which the airflow passes through the first AC device 42, the first DC device 43 and the second DC device 44 in sequence, the first DC device 43 and the second DC device 44 directly receive the cold air, which can improve the heat dissipation efficiency of the two, and keep the closed cavity 11 at a uniform temperature, further avoiding the problem of local hot spots.

[0071] In some embodiments, the above component group can also be used as follows Figures 1 to 3 The structure shown, see Figures 1 to 3 The component group also includes a second AC device 45 , which is located in the upper half of the AC cavity and in front of the inverter module 41 .

[0072] In the front direction of the cabinet 1, the second AC device 45 is located between the second DC device 44 and the inverter module 41, and is located on the leeward side of the inverter module 41; the second AC device 45 is electrically connected to the second DC device 44 and the inverter module 41. The second AC device 45 is also a low heat device.

[0073] The second AC device 45 and the inverter module 41 are distributed along the front-to-back direction of the cabinet 1, and the inverter module 41 and the first AC device 42 are distributed along the top-to-bottom direction of the cabinet 1, and the second AC device 45, the inverter module 41, and the first AC device 42 are electrically connected in sequence, thereby optimizing the device layout and cable layout in the AC cavity.

[0074] A small portion of the cold air output by the fourth fan 54 may be directed to the second AC device 45 to dissipate heat therefrom. In addition, a portion of the airflow passing through the second DC device 44 may also be directed to the second AC device 45 to dissipate heat therefrom.

[0075] In some embodiments, the above component group can also be used as follows Figure 1 and Figure 2 The structure shown, see Figure 1 and Figure 2 A second ventilation duct 6 is provided in the lower half of the AC cavity, and the second ventilation duct 6 is located in front of the first AC device 42; the fourth fan 54 is located directly above the second ventilation duct 6; the component group also includes a low protection module 46 arranged in the second ventilation duct 6.

[0076] The low protection module 46 is generally a module with a large volume and a heavy weight. It usually generates a lot of heat, but the protection requirements are not high. There is no need to place the low protection module 46 in the closed cavity 11. The low protection module 46 is placed at the bottom of the cabinet 1, and a second ventilation duct 6 is provided on the outside to optimize the layout of the first AC device 42, the second ventilation duct 6, and the first DC device 43, and reasonably utilize the load-bearing structure of the entire cabinet 1 to increase the stability of the low protection module 46 inside the cabinet 1.

[0077] Specifically, the air inlet of the second ventilation duct 6 is opened on the lower side plate of the cabinet 1, and the air outlet is opened on the front side plate of the cabinet 1. The airflow direction of the second ventilation duct 6 is as follows: Figure 4 shown.

[0078] In some embodiments, the cabinet 1 can also be used as follows Figure 3 The structure shown, see Figure 3 A sealing plate 12 is provided on the inner side of the front side plate of the cabinet 1, and the sealing plate 12 and the front side plate of the cabinet 1 form a vertical channel 13; the air inlet of the vertical channel 13 is connected to the air outlet end of the second fan 52, and the air outlet faces the second DC device 44; the hot air flowing through the vertical channel 13 can be heat exchanged through the front side plate of the cabinet 1.

[0079] The sealing plate 12 is located behind the front side plate of the cabinet 1. A vertical channel 13 can be formed by the sealing plate 12 and the front side plate of the cabinet 1. The vertical channel 13 has air intake at the bottom and air outlet at the top, which conforms to the natural trend of hot air flowing upward.

[0080] As the second fan 52 draws air, negative pressure is formed in the lower space of the cabinet 1, so that the airflow in the lower half flows forward, and the air outlet of the second fan 52 faces the air inlet of the vertical channel 13, and the second fan 52 can also send part of the heated airflow into the vertical channel 13. Since the front side plate of the cabinet 1 directly faces the outside, the airflow can transfer heat to the outside through the front side plate when passing through the vertical channel 13, so as to reduce the temperature of the airflow return and improve the heat exchange efficiency.

[0081] After the airflow is cooled through the vertical channel 13, it enters the upper part of the DC cavity. The cooled part of the airflow can pass through the second DC device 44, the second AC device 45 and the inverter module 41 in sequence to further dissipate heat from the second DC device 44, the second AC device 45 and the inverter module 41.

[0082] In addition, since the air outlet end of the vertical channel 13 is located above the air inlet end of the vertical channel 13, the return air path of the air circulation flow can be changed by reasonably determining the height position of the air outlet end of the vertical channel 13, so that the heat can be reasonably dissipated according to the heating requirements of the electrical components in the upper part of the closed cavity 11.

[0083] In some embodiments, the inverter module 41 may be configured as follows: Figure 2 and Figure 5 The structure shown, see Figure 2 and Figure 5 The inverter modules 41 are provided with multiple phases at intervals, and each phase inverter module 41 is respectively connected with a heat sink; the first ventilation duct 2 includes a first duct 21 and second ducts 22 corresponding to multiple heat sinks one by one; the evaporation part 31 is located in the first duct 21, and the heat sink is located in the corresponding second duct 22; wherein, the first duct 21 covers the air inlets of each second duct 22, and in the spacing direction of the multi-phase inverter modules 41, the two ends of the evaporation part 31 extend respectively to below the air inlets of the two second ducts 22 located on both sides.

[0084] The inverter module 41 is the main power device for realizing the energy storage inverter cabinet. It is provided with multiple phases to increase the output power of the cabinet. In order to adapt to the circulation of airflow, the multi-phase inverter modules 41 are spaced apart along the left and right directions of the cabinet 1. The main heat-generating outer surface of each phase inverter module 41 is parallel to the front and rear directions of the cabinet 1.

[0085] Since the multi-phase inverter modules 41 are distributed at intervals, a flow channel can be formed between every two adjacent second air ducts 22. In addition, there is a ventilation gap between the inverter module 41 located on the far left and the left side panel of the cabinet 1. The airflow blows the heat-generating outer surface of the inverter modules 41 of each phase through each flow channel and the ventilation gap, takes away the heat, and ensures uniform heat dissipation of the inverter modules 41 of each phase.

[0086] The multiple second air ducts 22 are distributed in parallel, and the first air duct 21 is located upstream of the multiple second air ducts 22. The first air duct 21 can be regarded as the total air inlet duct of the multiple second air ducts 22. The first air duct 21 covers the air inlets of each second air duct 22. Therefore, the length of the first air duct 21 can be regarded as the length occupied by the multiple second air ducts 22 in the left and right directions of the cabinet 1.

[0087] Although each second air duct 22 is independently arranged and distributed in parallel, each second air duct 22 is connected to the first air duct 21, and the air inlet of the first air duct 21 is opened on the rear side plate of the cabinet. In this way, only one total air inlet is required on the rear side plate of the cabinet to reduce the number of openings, that is, to reduce the interference of other external electrical equipment on the air inlet of the first ventilation duct 2.

[0088] The evaporation part 31 is located in the first air duct 21, and the two ends of the evaporation part 31 extend to the lower part of the air inlet of the two second air ducts 22 located on both sides, that is, the wind passing area of ​​the evaporation part 31 is roughly equal to the wind passing area of ​​the first air duct 21, and the evaporation part 31 can roughly fill the first air duct 21. With the above arrangement, on the one hand, the area of ​​the evaporation part 31 can be increased, and the heat exchange area can be improved. On the other hand, the amount of cold air entering each second air duct 22 is roughly the same, so the amount of cold air leading to each radiator is also roughly the same, thereby ensuring the temperature uniformity of each phase inverter module 41.

[0089] The air inlet of the first air duct 21 is provided on the rear side panel of the cabinet 1. In the prior art, the battery compartment, the energy storage inverter cabinet, and the transformer are arranged in sequence from front to back. The battery compartment is equipped with energy storage batteries. The energy storage batteries are high-heat generating devices, and it is usually necessary to ventilate and dissipate heat for the energy storage batteries, that is, an air inlet and an air outlet are provided on the battery compartment so that the inside of the battery compartment can be ventilated to dissipate heat for the energy storage batteries. Since the battery compartment will emit hot air, and the air outlet direction is different according to different installation environments, in order to avoid the hot air outlet of the battery compartment from blowing toward the first air duct 21 and affecting the incoming cold air, the air inlet of the first air duct 21 is set away from the battery compartment, that is, it is set on the rear side panel of the cabinet 1, facing the transformer, not facing the battery compartment, thereby preventing the hot air outlet of the battery compartment from entering the first air duct 21 and affecting the incoming air temperature.

[0090] In addition, an air guide cover 14 is provided at the air inlet of the first air duct 21 . The lower end surface and the side end surface of the air guide cover 14 are both provided with openings, and the openings are located below the air inlet of the first air duct 21 .

[0091] The wind guide cover 14 protects the periphery of the air inlet of the first air duct 21. The top surface of the wind guide cover 14 is not open. Impurities such as rainwater and dust can fall to the top surface of the wind guide cover 14 and flow downward along the wind guide cover 14 to avoid entering the first air duct 21. The wind guide cover 14 plays a role in further isolating impurities such as rainwater and dust.

[0092] It should be noted that the first air duct 21 and the second air duct 22 are both located in the AC cavity; the first air duct 21 is extended along the front-to-back direction of the cabinet 1, and multiple second air ducts 22 are spaced apart along the left-to-right direction of the cabinet 1, and each second air duct 22 is extended along the up-and-down direction of the cabinet 1; the first air duct 21 is located below the second air duct 22.

[0093] The first ventilation duct 2 also includes a third duct 23, which is located above each second duct 22 and is connected to the air outlet of each second duct 22; an exhaust fan is provided in the third duct 23; the air outlet of the third duct 23 is arranged on the side panel of the cabinet 1 corresponding to the DC cavity, and / or the air outlet of the third duct 23 is arranged on the side panel of the cabinet 1 corresponding to the AC cavity.

[0094] Specifically, the airflow direction of the first ventilation duct 2 is as follows: Figure 4 shown.

[0095] In some embodiments, the heat exchanger 3 may also be used as follows: Figure 2 and Figure 5 The structure shown, see Figure 2 and Figure 5 The heat exchanger 3 also includes a heat exchange pipeline 33, which connects the evaporation part 31 and the condensation part 32; the height of the condensation part 32 is greater than the height of the evaporation part 31.

[0096] In the prior art, the outer dimensions of the evaporation section 31 are matched with the outer dimensions of the condensation section 32. Since the condensation section 32 is located in the AC cavity and AC devices are distributed on the periphery, in order to adapt to the space requirements, the length of the condensation section 32 is generally shortened and the width of the condensation section 32 is increased. This causes the width of the evaporation section 31 to also become smaller, and it cannot be matched with the air flow size of the first air duct 21.

[0097] In order to solve the above problems, in this embodiment, the evaporation part 31 and the condensation part 32 are connected by a heat exchange tube, and the heat exchange tube is used to transfer heat. In this way, the evaporation part 31 and the condensation part 32 can be adjusted according to their respective spaces, so that the evaporation part 31 can roughly fill the first air duct 21, so that the air volume entering each second air duct 22 is roughly equal, thereby ensuring the temperature uniformity of the multi-phase inverter module 41; and the condensation part 32 will not interfere with the AC device.

[0098] In some embodiments, the evaporation portion 31 and each second air duct 22 may also be connected by a Figure 6 The structure shown, see Figure 6 There is a wind gap 24 between the evaporation portion 31 and the air inlets of the plurality of second air ducts 22 , and part of the cold air passing through the first air duct 21 directly flows into the wind gap 24 and enters each second air duct 22 .

[0099] Most of the cold air entering the first air duct 21 passes through the evaporator 31 and then enters each second air duct 22, while a small amount of cold air does not pass through the evaporator 31, but directly enters each second air duct 22 through the wind gap 24. This can reduce the temperature of the cold air entering the second air duct 22, that is, reduce the temperature of the cold air passing through the radiator, thereby improving the heat dissipation performance of the inverter module 41.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage inverter cabinet, characterized in that: include: The cabinet (1) has a closed cavity (11); the upper half of the closed cavity (11) is provided with a first ventilation duct (2), the first ventilation duct (2) being in communication with the outside; a radiator is also provided in the first ventilation duct (2); The heat exchanger (3) comprises an evaporation section (31) and a condensation section (32); the evaporation section (31) is located in the first ventilation duct (2); the condensation section (32) is arranged in the closed cavity (11) and below the first ventilation duct (2), and the air inlet end of the condensation section (32) is close to the rear side plate of the cabinet (1); A component group, comprising an inverter module (41) and a first low-heat-generating device; the inverter module (41) is arranged in the upper half of the closed cavity (11) and is arranged in close contact with the heat sink; the first low-heat-generating device is arranged in the lower half of the closed cavity (11) and is located downstream of the air outlet side of the condensation portion (32); The airflow in the closed cavity (11) forms a circulating flow based on the condensation portion (32).

2. The energy storage inverter cabinet according to claim 1, characterized in that: The closed cavity (11) comprises a DC cavity and an AC cavity which are sequentially distributed along the front-rear direction of the cabinet (1); the condensation portion (32) is located in the AC cavity; The first low-heat-generating device comprises a first AC device (42) and a first DC device (43), wherein the first AC device (42) is located in the lower half of the AC cavity, and the first DC device (43) is located in the lower half of the DC cavity; A first fan (51) is provided on the air outlet side of the condensation section (32), and the first fan (51) is used to supply air to the lower half of the closed cavity (11); a second fan (52) is provided in front of the first DC device (43), and the second fan (52) is used to extract the airflow passing through the first DC device (43).

3. The energy storage inverter cabinet according to claim 2, characterized in that: The inverter module (41) is located in the upper half of the AC cavity; The component group further includes a second DC device (44), wherein the second DC device (44) is located in the upper half of the DC cavity; A third fan (53) is provided in the closed cavity (11), and the third fan (53) is located downstream and rearward of the second DC device (44). The third fan (53) is used to extract hot air passing through the second DC device (44) and pass it to the condensation part (32).

4. The energy storage inverter cabinet according to claim 3, characterized in that: A fourth fan (54) is also provided in the closed cavity (11); the air inlet end of the fourth fan (54) faces the air outlet end of the first fan (51), and the air outlet end faces the second DC device (44) and the first DC device (43); the fourth fan (54) is used to supply air to the second DC device (44) and the first DC device (43).

5. The energy storage inverter cabinet according to claim 4, characterized in that: The component group further includes a second AC device (45), which is located in the upper half of the AC cavity and in front of and upstream of the inverter module (41).

6. The energy storage inverter cabinet according to claim 4, characterized in that: A second ventilation duct (6) is provided in the lower half of the AC cavity, and the second ventilation duct (6) is located in front of the first AC device (42); the fourth fan (54) is located directly above the second ventilation duct (6); and the component group also includes a low protection module (46) arranged in the second ventilation duct (6).

7. The energy storage inverter cabinet according to claim 3 or 4, characterized in that: A sealing plate (12) is provided on the inner side of the front side plate of the cabinet (1), and the sealing plate (12) and the front side plate of the cabinet (1) form a vertical channel (13); the air inlet of the vertical channel (13) is connected to the air outlet end of the second fan (52), and the air outlet faces the second DC device (44); The hot air flowing through the vertical channel (13) can exchange heat through the front side plate of the cabinet (1).

8. The energy storage inverter cabinet according to claim 1, characterized in that: The inverter module (41) is provided with multiple phases at intervals, and each phase of the inverter module (41) is respectively connected to a heat sink; The first ventilation duct (2) comprises a first duct (21) and second ducts (22) corresponding one-to-one to the plurality of radiators; the evaporation portion (31) is located in the first duct (21), and the radiator is located in the corresponding second duct (22); The first air duct (21) covers the air inlets of each of the second air ducts (22), and in the spacing direction of the multi-phase inverter module (41), the two ends of the evaporation part (31) extend respectively to below the air inlets of two of the second air ducts (22) located on both sides.

9. The energy storage inverter cabinet according to claim 8, characterized in that: The heat exchanger (3) further comprises a heat exchange pipeline (33), wherein the heat exchange pipeline (33) connects the evaporation part (31) and the condensation part (32).

10. The energy storage inverter cabinet according to claim 8, characterized in that: There is a wind gap (24) between the evaporation portion (31) and the air inlets of the plurality of second air ducts (22), and part of the cold air passing through the first air duct (21) directly flows into the wind gap (24) and enters each of the second air ducts (22).

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