An energy storage inverter cabinet

Abstract

This invention provides an energy storage inverter cabinet, belonging to the field of electrical equipment technology, including a cabinet body, a heat exchanger, and a component assembly. The cabinet body has a closed cavity; the upper half of the closed cavity is provided with a first ventilation duct, and a heat sink is provided within the first ventilation duct; the heat exchanger includes a condenser section and an evaporator section; the condenser section is located within the first ventilation duct; the air inlet side of the evaporator section is close to the rear panel of the cabinet body; the component assembly includes an inverter module and a first low-heat-generating device; the inverter module is disposed in the upper half of the closed cavity and is fitted to the heat sink; the first low-heat-generating device is disposed in the lower half of the closed cavity and is located downstream of the air outlet side of the evaporator section. The condenser section of this invention is located within the first ventilation duct, which can prevent external impurities from entering the first ventilation duct and causing blockage of the condenser section; the inverter module is mainly cooled by the heat sink, and the first low-heat-generating device can be cooled by the cold air passing through the evaporator section, thereby ensuring the heat dissipation efficiency of the component assembly and avoiding localized hot spots.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and more specifically, relates to an energy storage inverter cabinet. Background Technology

[0002] Energy storage inverters are devices that convert DC power to AC power, primarily used in energy storage systems for photovoltaic, wind, and nuclear power generation. An energy storage inverter typically includes power devices such as inverter modules, reactor modules, and capacitor busbar modules. Because some energy storage inverters are used in harsh environments such as high temperature, high humidity, and high dust, the cabinet must have high sealing performance and a high protection level to protect the internal power devices; therefore, a closed-loop cooling system must be used inside the cabinet.

[0003] In existing technologies, to improve the heat dissipation efficiency of power devices inside the server rack, an air-to-air heat exchanger is installed on the back of the rack door panel. Part of the air-to-air heat exchanger is located inside the rack, and the other part is located outside the rack. The air-to-air heat exchanger is used to conduct heat away from the inside of the rack. However, with the air-to-air heat exchanger installed on the back of the rack door panel, it is very easy for the heat exchange core and the external circulation fan to become dirty and clogged, or even damaged, leading to high maintenance frequency. Moreover, for racks with large spaces, there may be localized hot spots, resulting in poor overall heat dissipation of the rack. Summary of the Invention

[0004] The purpose of this invention is to provide an energy storage inverter cabinet that addresses the technical problems of poor internal heat dissipation and high maintenance frequency in existing cabinets.

[0005] To achieve the above objectives, 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 part of the closed cavity is provided with a first ventilation duct, which is connected to the outside; a radiator is also provided inside the first ventilation duct.

[0007] A heat exchanger includes a condenser section and an evaporator section; the condenser section is located inside the first ventilation duct; the evaporator section is disposed inside the enclosed cavity and located below the first ventilation duct, with the air inlet end of the evaporator section close to the rear panel of the cabinet.

[0008] The component group includes an inverter module and a first low-heat device; the inverter module is disposed in the upper half of the enclosed cavity and is fitted to the heat sink; the first low-heat device is disposed in the lower half of the enclosed cavity and is located downstream of the air outlet side of the evaporator.

[0009] The airflow within the enclosed cavity circulates around the evaporation section.

[0010] In one possible implementation, the enclosed cavity includes a DC cavity and an AC cavity sequentially distributed along the front-to-back direction of the cabinet; the evaporator is located within the AC cavity;

[0011] The first low-heat device includes a first AC device and a first DC device, wherein 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] The evaporator is provided with a first fan on the air outlet side, which is used to supply air to the lower half of the enclosed cavity; a second fan is provided in front of the first DC device, which is used to draw 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 also includes a second DC device, which is located in the upper half of the DC cavity;

[0015] A third fan is provided inside the enclosed cavity. The third fan is located downstream of the second DC device. The third fan is used to draw hot air passing through the second DC device and direct it to the evaporation section.

[0016] In some embodiments, a fourth fan is also provided in the enclosed cavity. The air inlet of the fourth fan faces the air outlet of the first fan, and the air outlet faces the second DC device and the first DC device. 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 located in the upper half of the AC cavity and upstream of the inverter module.

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

[0019] In some embodiments, a sealing plate is provided on the inner side of the front panel of the cabinet, and the sealing plate and the front panel 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 panel of the cabinet.

[0021] In one possible implementation, the inverter module is provided with multiple phases at intervals, and each phase of the inverter module is respectively connected to a heat sink.

[0022] The first ventilation duct includes a first air duct and a second air duct corresponding to each of the plurality of heat sinks; the condenser is located in the first air duct and the heat sink is located in the corresponding second air duct;

[0023] The first air duct covers the air inlets of each of the second air ducts, and in the interval direction of the multiphase inverter module, the two ends of the condenser extend to the bottom of the air inlets of the two second air ducts located on both sides.

[0024] In some embodiments, the heat exchanger further includes heat exchange piping connecting the condenser section and the evaporator section.

[0025] In some embodiments, there is an air gap between the condenser and the air inlets of the plurality of second air ducts, and some of the cold air passing through the first air duct is directly introduced into each of the second air ducts through the air gap.

[0026] The beneficial effects of the energy storage inverter cabinet provided by this invention are as follows: Compared with the prior art, it has the following advantages:

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

[0028] The condenser sections of both the radiator and the heat exchanger are located inside the first ventilation duct, which is located in a closed cavity. This increases the air intake path of the condenser section, preventing external impurities such as rainwater and dust from entering the first ventilation duct and causing blockage of the condenser section. Moreover, there is no need to install an external circulation fan, which reduces the maintenance frequency.

[0029] The inverter module and the first low-heat device are respectively located in the upper and lower halves of the enclosed cavity, optimizing the spatial layout of the enclosed cavity. The inverter module is mainly cooled by a heat sink. The first low-heat device is located on the air outlet side of the evaporator. Since the airflow in the enclosed cavity can form a circulating flow with the evaporator as the reference, the first low-heat device can be cooled by the cold air passing through the evaporator, thereby ensuring the heat dissipation efficiency of the component group in the enclosed cavity and avoiding local hot spots. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0032] Figure 2 A schematic diagram of the internal three-dimensional structure of the energy storage inverter cabinet provided in an embodiment of the present invention. Figure 2 (The left and rear panels of the cabinet are not shown in the picture.)

[0033] Figure 3 Schematic diagram of the internal planar structure of the energy storage inverter cabinet provided in the embodiment of the present invention. Figure 1 (The arrows in the diagram indicate the direction of airflow circulation within the enclosed cavity.)

[0034] Figure 4 Schematic diagram of the internal planar structure of the energy storage inverter cabinet provided in the embodiment of the present invention. Figure 2 (The arrows in the diagram indicate the direction of airflow within the ventilation duct.)

[0035] Figure 5 for Figure 2 Side view;

[0036] Figure 6 for Figure 5 Enlarged structural diagram of point A in the middle circle.

[0037] In the picture:

[0038] 1. Cabinet; 11. Enclosed cavity; 12. Sealing panel; 13. Vertical passageway; 14. Air guide hood;

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

[0040] 3. Heat exchanger; 31. Condensation section; 32. Evaporation section; 33. Heat exchange piping;

[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 Implementation

[0044] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0045] Please refer to the following: Figures 1 to 5 The energy storage inverter cabinet provided by the present invention will now be described. The energy storage inverter cabinet includes a cabinet body 1, a heat exchanger 3, and a component assembly; the cabinet body 1 has a closed cavity 11; the upper half of the closed cavity 11 is provided with a first ventilation duct 2, which is connected to the outside; a heat sink is also provided in the first ventilation duct 2; the heat exchanger 3 includes a condenser 31 and an evaporator 32; the condenser 31 is located in the first ventilation duct 2; the evaporator 32 is located in the closed cavity 11 and below the first ventilation duct 2, with the air inlet side of the evaporator 32 close to the rear panel of the cabinet body 1; the component assembly includes an inverter module 41 and a first low-heat device; the inverter module 41 is located in the upper half of the closed cavity 11 and is fitted to the heat sink; the first low-heat device is located in the lower half of the closed cavity 11 and downstream of the air outlet side of the evaporator 32; wherein, the airflow in the closed cavity 11 forms a circulating flow with the evaporator 32 as the reference.

[0046] Cabinet 1 has a rectangular parallelepiped structure, consisting of a front panel, a rear panel, a left side panel, a top panel, a bottom panel, and a supporting frame connecting and supporting these panels. Cabinet 1 has a closed cavity 11, which can be understood as the six panels of cabinet 1 forming a closed cavity 11, or the six panels of cabinet 1 cooperating with other sealing panels 12 within cabinet 1 to form a closed cavity 11. The closed cavity 11 is not connected to the outside, thus giving it high sealing performance and a high protection level, enabling the electrical cabinet to be used in harsh environments such as high temperature, high humidity, and high dust, and meeting the usage requirements of the component assembly.

[0047] It should be noted that the aforementioned front, back, left, right, up, and down directions are based on the front door panel of cabinet 1 after installation. Generally, cabinet 1 is equipped with a front door panel (i.e., front side panel), which can be opened to allow maintenance of the components inside the enclosed 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 lot 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 heat sink. The heat sink is set in close contact with the inverter module 41 and can remove the heat generated by the inverter module 41.

[0049] Specifically, the heat sink includes multiple spaced-apart heat dissipation fins. The heat sink is generally a low-protection-level device and does not need to be housed within the enclosed cavity 11. Furthermore, the heat sink requires continuous cooling airflow to absorb heat; therefore, it is located within the first ventilation duct 2, which is connected to the outside environment. Cool air from outside enters the first ventilation duct 2 and blows directly onto the heat sink to remove heat from the inverter module 41. It should be noted that because the heat sink is located inside the first ventilation duct 2, its position and structure are not shown in the attached drawings.

[0050] Since the enclosed cavity 11 houses not only the inverter module 41 but also other low-heat-generating devices, such as the first low-heat-generating device, and only the inverter module 41 is cooled by a heat sink while the other low-heat-generating devices are not cooled, the ambient temperature of the enclosed cavity 11 will rise, causing localized hot spots and affecting the normal operation of the power device group. Therefore, this embodiment also includes a heat exchanger 3.

[0051] Specifically, the heat exchanger 3 includes a condenser section 31 and an evaporator section 32. The condenser section 31 is located inside the first ventilation duct 2, and the evaporator section 32 is located inside the enclosed cavity 11. The first ventilation duct 2 is connected to the outside, and cold air from the outside is introduced into the first ventilation duct 2 and blows directly onto the condenser section 31 to lower its temperature. The condenser section 31 also absorbs heat from the evaporator section 32 through heat exchange, thus lowering its temperature. After passing through the evaporator section 32, the airflow is cooled and becomes cold air.

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

[0053] The airflow within the enclosed cavity 11 can form a circulating flow with the evaporator 32 as the reference. Since the temperature of the evaporator 32 of the heat exchanger 3 is low, the airflow is cooled down after passing through the evaporator 32, and then passes through the first low-heating device, carrying away the heat of the first low-heating device. Since the airflow can form a circulating flow, it continuously carries away the heat of the first low-heating device, thereby avoiding the problem of local hot spots. Moreover, the evaporator 32 can cool down the high-temperature airflow, preventing the temperature of the circulating gas from continuously increasing, thereby reducing the ambient temperature of the enclosed cavity 11 and improving 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 usage requirements of high sealing performance and high protection level of the cabinet.

[0055] The condenser section 31 of the radiator and 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. This can increase the air intake path of the condenser section 31, prevent external impurities such as rainwater and dust from entering the first ventilation duct 2 and causing blockage of the condenser section 31, and eliminate the need for an external circulation fan, thereby reducing the maintenance frequency.

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

[0057] In some embodiments, the first low-heat-generating device and the enclosed cavity 11 described above can be adopted as follows: Figures 1 to 3 The structure shown is described in the following document. Figures 1 to 3 The enclosed cavity 11 includes a DC cavity and an AC cavity arranged sequentially along the front and rear direction of the cabinet 1; the evaporator 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 evaporator 32, and the first fan 51 is used to send air to the lower half of the enclosed cavity 11; a second fan 52 is provided in front of the first DC device 43, and the second fan 52 is used to draw out the hot air that has passed through the first DC device 43.

[0058] The DC cavity houses the DC power devices, and the AC cavity houses the AC power devices. The DC and AC power devices are electrically connected. When this 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 via wiring harnesses, and the AC power devices are connected to the power devices in the transformer via wiring harnesses. Typically, the battery compartment, energy storage inverter cabinet, and transformer are arranged sequentially from front to back. Figures 1 to 4 The front-to-back direction of cabinet 1 is defined, with the DC cavity in front and the AC cavity 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 essentially fill the lower half of the enclosed cavity 11. Specifically, the first AC device 42 is located on the air outlet side of the evaporator section 32, and the first DC device 43 is located downstream and in front of the first AC device 42.

[0060] The first fan 51 is a supply fan. The air inlet of the first fan 51 is attached to the air outlet side of the evaporator section 32, and the air outlet of the first fan 51 faces the front panel of the cabinet 1. Figure 3 As shown. The airflow passing through the evaporator 32 is cooled by the evaporator 32 and becomes cold air. The first fan 51 simultaneously delivers the cold air to the lower half of the enclosed cavity 11, that is, to the first AC device 42. The cold air passes through the first AC device 42, thereby carrying away its heat.

[0061] The second fan 52 is an exhaust fan, installed against the front panel of the cabinet 1, with its air inlet facing the rear panel of the cabinet 1. It 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. After passing through the first DC device 43 again, it can still remove the heat from the first DC device 43. The second fan 52, in conjunction with the first fan 51, can increase the airflow, allowing the cold air to quickly pass through the first AC device 42 and the first DC device 43, thereby improving the heat dissipation efficiency of the first low-heat-generating device.

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

[0063] The first low-heating device is located in the lower half of the enclosed cavity 11. The cold air passing through the evaporator 32 will naturally flow downward and pass through the first AC device 42. The first fan 51 and the second fan 52 work together to make the airflow flow forward and pass through the first DC device 43. The temperature of the cold air rises after passing through the first DC device 43. According to the natural upward flow trend of hot air, the airflow will naturally rise to the upper front half of the enclosed cavity 11 and finally flow back to the evaporator 32 to cool down.

[0064] In some embodiments, the above-mentioned component group may also employ, for example... Figures 1 to 3 The structure shown is described in the following document. 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 enclosed cavity 11, which is located downstream of the second DC device 44, and is used to draw hot air passing through the second DC device 44 and direct it to the evaporator section 32.

[0065] Inverter module 41 is an AC device, so inverter module 41 is located in the upper half of AC cavity; in order to make reasonable use of the space in the upper half of enclosed cavity 11, a second DC device 44 is also provided in the upper half of 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 vertical direction, thereby optimizing the device layout and cable layout in DC cavity.

[0066] Moreover, according to the principles of aerodynamics, the airflow passing through the first DC device 43 will flow upwards and then pass through the second DC device 44 to carry away its heat and dissipate it.

[0067] In addition, a third fan 53 is provided downstream of the second DC device 44. The air inlet of the third fan 53 faces the front side panel of the cabinet 1, and the air outlet faces the evaporator 32. The third fan 53 is used to draw the airflow that has passed through the DC cavity upward and deliver it to the evaporator 32 for heat exchange.

[0068] The first fan 51, the second fan 52, and the third fan 53 work together to create a forward-upward-backward-downward circulating flow of air, which continuously cools the air as it passes through the evaporator 32, thereby reducing the ambient temperature of the enclosed cavity 11 and improving heat dissipation efficiency.

[0069] In some embodiments, the above-mentioned airflow circulation can also employ, for example... Figure 3 The structure shown is described in the following document. Figure 3 The enclosed cavity 11 is also equipped with a fourth fan 54. The air inlet of the fourth fan 54 faces the air outlet of the first fan 51, and the air outlet 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.

[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 draw in the cold air that has passed 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 be directly connected to the first DC device 43 and the second DC device 44. Compared with the way 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 devices and keep the enclosed cavity 11 at a uniform temperature, further avoiding the problem of local hot spots.

[0071] In some embodiments, the above-mentioned component group may also employ, for example... Figures 1 to 3 The structure shown is described in the following document. 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 upstream of the inverter module 41.

[0072] In the front direction of 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 respectively. 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 vertical direction of the cabinet 1. 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 can be directed to the second AC device 45 for heat dissipation. In addition, a portion of the airflow passing through the second DC device 44 can also be directed to the second AC device 45 for heat dissipation.

[0075] In some embodiments, the above-mentioned component group may also employ, for example... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The lower half of the AC cavity is provided with a second ventilation duct 6, which 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 disposed in the second ventilation duct 6.

[0076] The low protection module 46 is generally a large and heavy module with a large heat generation, but the protection requirements are not high. It is not necessary to put the low protection module 46 into the closed cavity 11. Instead, the low protection module 46 is placed at the bottom of the cabinet 1 and covered with a second ventilation duct 6 to optimize the layout of the first AC device 42, the second ventilation duct 6, and the first DC device 43, and to make reasonable use of 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 located on the lower side panel of the cabinet 1, and the air outlet is located on the front side panel of the cabinet 1. The airflow direction of the second ventilation duct 6 is as follows: Figure 4 As shown.

[0078] In some embodiments, the cabinet 1 described above may also adopt the following: Figure 3 The structure shown is described in the following document. Figure 3 The inner side of the front panel of the cabinet 1 is provided with a sealing plate 12, which together with the front panel of the cabinet 1 forms a vertical channel 13. The air inlet of the vertical channel 13 is connected to the air outlet 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 panel of the cabinet 1.

[0079] The sealing plate 12 is located behind the front side panel of the cabinet 1. With the help of the sealing plate 12 and the front side panel of the cabinet 1, a vertical channel 13 can be formed. 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] Because the second fan 52 draws air, a negative pressure is created in the lower space of the cabinet 1, causing the airflow in the lower half to flow forward. Furthermore, the outlet of the second fan 52 faces the air inlet of the vertical channel 13, and the second fan 52 can also send some of the heated airflow into the vertical channel 13. Since the front panel of the cabinet 1 directly faces the outside, the airflow can transfer heat outward through the front panel as it passes through the vertical channel 13, thereby reducing the temperature of the recirculated airflow and improving heat exchange efficiency.

[0081] After the airflow is cooled by the vertical channel 13, it enters the upper part of the DC cavity. The cooled 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 of the vertical channel 13 is located above the air inlet of the vertical channel 13, by reasonably determining the height of the air outlet of the vertical channel 13, the return air path of the airflow circulation can be changed, thereby allowing for reasonable heat dissipation according to the heat dissipation requirements of the electrical components in the upper part of the enclosed cavity 11.

[0083] In some embodiments, the inverter module 41 described above can be adopted as follows: Figure 2 and Figure 5 The structure shown is described in the following document. Figure 2 and Figure 5 The inverter module 41 is provided with multiple phases at intervals, and each phase inverter module 41 is connected to a heat sink; the first ventilation duct 2 includes a first air duct 21 and a second air duct 22 corresponding to each of the multiple heat sinks; the condenser 31 is located in the first air duct 21, and the heat sink is located in the corresponding second air duct 22; wherein, the first air duct 21 covers the air inlet of each second air duct 22, and in the interval direction of the multiphase inverter module 41, the two ends of the condenser 31 extend to the bottom of the air inlet of the two second air ducts 22 located on both sides.

[0084] The inverter module 41 is the main power device of this energy storage inverter cabinet. It is multi-phase, which can increase the output power of the cabinet. In order to adapt to the airflow circulation, the multi-phase inverter modules 41 are distributed at intervals 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 back directions of the cabinet 1.

[0085] Because the multiphase inverter modules 41 are spaced apart, a flow channel can be formed between each pair of adjacent second air ducts 22. In addition, there is a ventilation gap between the leftmost inverter module 41 and the left side panel of the cabinet 1. The airflow blows through each flow channel and ventilation gap onto the heat-generating outer surface of each phase inverter module 41, carrying away heat and ensuring uniform heat dissipation for each phase inverter module 41.

[0086] Multiple second air ducts 22 are arranged in parallel. 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 main air inlet of the multiple second air ducts 22. The first air duct 21 covers the air inlet 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 direction of the cabinet 1.

[0087] Although each of the second air ducts 22 is set independently and distributed in parallel, each of the second air ducts 22 is connected to the first air duct 21, and the air inlet of the first air duct 21 is opened on the rear panel of the cabinet. In this way, only one main air inlet needs to be opened on the rear panel of the cabinet to reduce the number of openings, that is, to reduce the interference of other external electrical equipment on the air intake of the first ventilation duct 2.

[0088] The condenser section 31 is located within the first air duct 21, and both ends of the condenser section 31 extend below the air inlets of the two second air ducts 22 located on both sides. In other words, the air passage area of ​​the condenser section 31 is approximately equal to the air passage area of ​​the first air duct 21, and the condenser section 31 can almost completely fill the first air duct 21. With the above arrangement, on the one hand, the area of ​​the condenser section 31 can be increased, thereby improving the heat exchange area; on the other hand, the amount of cold air entering each of the second air ducts 22 is approximately the same, so the amount of cold air flowing to each heat sink is also approximately the same, thus ensuring the temperature uniformity of each phase inverter module 41.

[0089] The air inlet of the first air duct 21 is located on the rear panel of the cabinet 1. In the prior art, the battery compartment, energy storage inverter cabinet, and transformer are arranged sequentially from front to back. The battery compartment is equipped with energy storage batteries, which are high-heat-generating devices and typically require ventilation and heat dissipation. This is achieved by installing air inlets and outlets on the battery compartment to allow for ventilation and heat dissipation. Since the battery compartment emits hot air, and the direction of the airflow varies depending on the installation environment, to prevent the hot air from blowing onto the first air duct 21 and affecting the incoming cool air, the air inlet of the first air duct 21 is located away from the battery compartment. Specifically, it is located on the rear panel of the cabinet 1, facing the transformer and not towards the battery compartment. This prevents the hot air from the battery compartment from entering the first air duct 21 and affecting the incoming air temperature.

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

[0091] The air guide cover 14 protects the outer perimeter of the air inlet of the first air duct 21. The top surface of the air guide cover 14 is not open, so rainwater, dust and other impurities can fall onto the top surface of the air guide cover 14 and flow downward along the air guide cover 14 to avoid entering the first air duct 21. The air guide cover 14 plays a role in further isolating rainwater, dust and other impurities.

[0092] It should be noted that both the first air duct 21 and the second air duct 22 are located inside the AC cavity; the first air duct 21 extends along the front-to-back direction of the cabinet 1, and multiple second air ducts 22 are distributed at intervals along the left-to-right direction of the cabinet 1, and each second air duct 22 extends along the up-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 of the second ducts 22 and is connected to the air outlet of each of the second ducts 22; the third duct 23 is equipped with an exhaust fan; the air outlet of the third duct 23 is located on the side panel of the cabinet 1 corresponding to the DC cavity, and / or the air outlet of the third duct 23 is located 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 As shown.

[0095] In some embodiments, the heat exchanger 3 described above may also employ, for example... Figure 2 and Figure 5 The structure shown is described in the following document. Figure 2 and Figure 5 The heat exchanger 3 also includes a heat exchange pipe 33, which connects the condenser section 31 and the evaporator section 32; the height of the evaporator section 32 is greater than the height of the condenser section 31.

[0096] In the prior art, the external dimensions of the condenser 31 are matched with the external dimensions of the evaporator 32. Since the evaporator 32 is located in the AC cavity and has AC devices distributed around it, in order to adapt to space requirements, the length of the evaporator 32 is generally reduced and the width of the evaporator 32 is increased. This results in the width of the condenser 31 also becoming smaller, which cannot be matched with the air passage size of the first air duct 21.

[0097] To solve the above problems, this embodiment connects the condenser 31 and the evaporator 32 through a heat exchange tube, which is used to transfer heat. In this way, the condenser 31 and the evaporator 32 can be adjusted according to their respective spaces, so that the condenser 31 can roughly fill the first air duct 21, so that the air volume entering each second air duct 22 is roughly equal, ensuring the temperature uniformity of the multiphase inverter module 41; and the evaporator 32 will not interfere with the AC devices.

[0098] In some embodiments, the condenser 31 and each of the second air ducts 22 may also be connected by a means such as Figure 6 The structure shown is described in the following document. Figure 6 There is an air gap 24 between the condenser section 31 and the air inlets of the multiple second air ducts 22. Some of the cold air passing through the first air duct 21 is directly passed through the air gap 24 and enters each of the second air ducts 22.

[0099] Most of the cold air entering the first air duct 21 passes through the condenser 31 and then enters each of the second air ducts 22. A small portion of the cold air does not pass through the condenser 31 but directly enters each of the second air ducts 22 through the air gap 24. This reduces the temperature of the cold air entering the second air duct 22, that is, reduces the temperature of the cold air passing through the heat sink, 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 within 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), which is connected to the outside; a radiator is also provided in the first ventilation duct (2); The heat exchanger (3) includes a condenser (31) and an evaporator (32); the condenser (31) is located in the first ventilation duct (2) and upstream of the radiator; the evaporator (32) is located in the enclosed cavity (11) and below the first ventilation duct (2), and the air inlet of the evaporator (32) is close to the rear panel of the cabinet (1); The component group includes an inverter module (41) and a first low-heat device; the inverter module (41) is disposed in the upper half of the enclosed cavity (11) and is attached to the heat sink; the first low-heat device is disposed in the lower half of the enclosed cavity (11) and is located downstream of the air outlet side of the evaporation section (32). The enclosed cavity (11) is equipped with a third fan (53) and a fourth fan (54); the fourth fan (54) is located in the middle of the lower half of the enclosed cavity (11), and its air inlet faces the evaporator (32); the third fan (53) is located in the middle of the upper half of the enclosed cavity (11) and in front of the inverter module (41), and its air outlet faces the evaporator (32); the airflow in the enclosed cavity (11) forms a circulating flow with the evaporator (32) as the reference.

2. The energy storage inverter cabinet as described in claim 1, characterized in that, The enclosed cavity (11) includes a DC cavity and an AC cavity that are sequentially distributed along the front and rear direction of the cabinet (1); the evaporation section (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. The evaporator (32) is provided with a first fan (51) on the air outlet side, which is used to send air to the lower half of the enclosed cavity (11); a second fan (52) is provided in front of the first DC device (43), which is used to draw the airflow passing through the first DC device (43).

3. The energy storage inverter cabinet as described in claim 2, characterized in that, 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; The enclosed cavity (11) is equipped with a third fan (53), which is located downstream of the second DC device (44). The third fan (53) is used to draw hot air passing through the second DC device (44) and direct it to the evaporation section (32).

4. The energy storage inverter cabinet as described in claim 3, characterized in that, The enclosed cavity (11) is also provided with a fourth fan (54). The air inlet of the fourth fan (54) faces the air outlet of the first fan (51), and the air outlet 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 as described in claim 4, characterized in that, The component group also includes a second AC device (45), which is located in the upper half of the AC cavity and upstream of the inverter module (41).

6. The energy storage inverter cabinet as described in claim 4, characterized in that, The lower half of the AC cavity is provided with a second ventilation duct (6), which 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) disposed in the second ventilation duct (6).

7. The energy storage inverter cabinet as described in claim 3 or 4, characterized in that, The front panel of the cabinet (1) is provided with a sealing plate (12), and the sealing plate (12) and the front panel of the cabinet (1) form a vertical channel (13); the air inlet of the vertical channel (13) is connected to the air outlet 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 panel of the cabinet (1).

8. The energy storage inverter cabinet as described in 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 connected to a heat sink. The first ventilation duct (2) includes a first air duct (21) and a second air duct (22) corresponding to each of the plurality of heat sinks; the condenser (31) is located in the first air duct (21), and the heat sink is located in the corresponding second air duct (22). The first air duct (21) covers the air inlets of each of the second air ducts (22), and in the interval direction of the multiphase inverter module (41), the two ends of the condenser (31) extend to the bottom of the air inlets of the two second air ducts (22) located on both sides.

9. The energy storage inverter cabinet as described in claim 8, characterized in that, The heat exchanger (3) also includes a heat exchange pipeline (33) that connects the condenser (31) and the evaporator (32).

10. The energy storage inverter cabinet as described in claim 8, characterized in that, There is an air gap (24) between the condenser (31) and the air inlets of the multiple second air ducts (22). Some of the cold air passing through the first air duct (21) directly enters each of the second air ducts (22) through the air gap (24).

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