An electrical cabinet and electrical device

Abstract

The application discloses an electrical cabinet and an electrical device. The electrical cabinet comprises a cabinet body and a heat exchange part. The cabinet body has an electrical accommodating cavity. At least part of the cabinet wall of the cabinet body is configured as a hollow cabinet wall. The hollow cabinet wall has a first air inlet and a first air outlet, both of which are in communication with the electrical accommodating cavity. The heat exchange part is arranged outside the cabinet body and in heat exchange with the hollow cabinet wall. The electrical cabinet can not only meet the heat dissipation requirement of the electrical accommodating cavity, but also avoid the entry of impurities such as dust and particulate matters in the external environment into the electrical accommodating cavity, thereby greatly improving the protection performance of the electrical cabinet and meeting the heat dissipation requirement and the protection requirement of the electrical cabinet.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology for electrical equipment, and more specifically, to an electrical cabinet and electrical equipment. Background Technology

[0002] Currently, electrical cabinets for electrical equipment generally rely on open ventilation structures to exchange airflow with the external environment for heat dissipation (such as forced air cooling). However, open ventilation structures allow dust and particulate matter to easily penetrate the interior of the cabinet, affecting the insulation performance of related electrical components and increasing the risk of partial discharge, resulting in poor protection. Although open ventilation structures are generally designed with dust filters, these filters are prone to clogging and require frequent maintenance. Therefore, existing electrical cabinets cannot simultaneously meet both heat dissipation and protection requirements.

[0003] In summary, how to solve the problem that electrical cabinets cannot simultaneously meet heat dissipation and protection requirements has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, this application provides an electrical cabinet and electrical equipment to solve the problem that electrical cabinets cannot simultaneously meet heat dissipation and protection requirements.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] An electrical cabinet, comprising:

[0007] The cabinet body has an electrical receiving cavity, and at least a portion of the cabinet wall of the cabinet body is constructed as a hollow cabinet wall. The hollow cabinet wall has a first air inlet and a first air outlet, both of which are connected to the electrical receiving cavity.

[0008] The heat exchange section is located on the outside of the cabinet body and is arranged to exchange heat with the hollow cabinet wall.

[0009] In some embodiments of this application, the electrical cabinet further includes a first fan disposed within the cabinet body. The first fan is used to cause airflow in the electrical receiving cavity to flow from the first air inlet into the hollow cabinet wall and flow back into the electrical receiving cavity from the first air outlet.

[0010] In some embodiments of this application, the first fan is disposed inside the hollow cabinet wall or the electrical housing cavity.

[0011] In some embodiments of this application, the heat exchange section includes an air duct cavity, which is arranged for heat exchange with the hollow cabinet wall but not in communication with it. The air duct cavity has a second air inlet and a second air outlet, both of which are in communication with the external environment.

[0012] In some embodiments of this application, the heat exchange section further includes a second fan, which is disposed in the air duct cavity and is used to allow airflow from the external environment to flow into the air duct cavity from the second air inlet and out to the external environment from the second air outlet.

[0013] In some embodiments of this application, the air duct cavity and the hollow cabinet wall exchange heat through a heat exchanger. The heat exchanger has an evaporation end and a condensation end. The evaporation end is disposed in the hollow cabinet wall, and the condensation end is disposed in the air duct cavity.

[0014] In some embodiments of this application, the cabinet body includes a side cabinet wall, a top cabinet wall, and a bottom cabinet wall, which together form the electrical receiving cavity;

[0015] Wherein, the bottom cabinet wall is constructed as a hollow cabinet wall; and / or, the side cabinet wall is constructed as a hollow cabinet wall; and / or, the top cabinet wall is constructed as a hollow cabinet wall.

[0016] In some embodiments of this application, both the side cabinet wall and the top cabinet wall are constructed as hollow cabinet walls, and the hollow structure of the side cabinet wall is connected to the hollow structure of the top cabinet wall.

[0017] The heat exchange section is disposed on the side cabinet wall facing away from the electrical receiving cavity; or, the heat exchange section is disposed on the top cabinet wall facing away from the electrical receiving cavity.

[0018] In some embodiments of this application, the first air inlet is disposed on the top cabinet wall, and the first air outlet is disposed on the side cabinet wall and arranged close to the bottom cabinet wall.

[0019] To address the issue of electrical cabinets failing to simultaneously meet both heat dissipation and protection requirements, the electrical cabinet provided in this application specifically includes a cabinet body and a heat exchange section. Since at least a portion of the cabinet body's walls are constructed as hollow walls, and these hollow walls are connected to the electrical enclosure within the cabinet body via a first air inlet and a first air outlet, airflow within the electrical enclosure can flow into the hollow walls from the first air inlet and return to the electrical enclosure from the first air outlet, thus forming an internal airflow circulation within the electrical cabinet. Simultaneously, the heat exchange section is located on the outside of the cabinet body and is arranged for heat exchange with the hollow walls. Therefore, the airflow within the internal circulation can exchange heat with the external environment through the heat exchange section as it flows through the hollow walls, thereby achieving the heat dissipation requirement for the electrical enclosure. Furthermore, the electrical enclosure does not need to be connected to the external environment, thus preventing dust, particulate matter, and other impurities from entering the electrical enclosure and significantly improving the electrical cabinet's protective performance. Therefore, the electrical cabinet provided in this application can simultaneously meet both heat dissipation and protection requirements.

[0020] On the other hand, this application also provides an electrical device, including an electrical cabinet as described in any of the above solutions and a power conversion device disposed within the electrical housing cavity of the electrical cabinet. Since the aforementioned electrical cabinet has the above-mentioned technical effects, the electrical device having the electrical cabinet should also have corresponding technical effects, which will not be elaborated further here.

[0021] In some embodiments of this application, the power conversion device is a dry-type transformer, and a third fan is provided at the bottom of the dry-type transformer. The third fan is used to blow the airflow from the bottom of the dry-type transformer to the top of the dry-type transformer.

[0022] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of an electrical cabinet provided in an embodiment of this application (the direction indicated by the hollow arrow in the figure represents the airflow direction);

[0025] Figure 2 Another structural schematic diagram of the electrical cabinet provided in the embodiment of this application (the direction indicated by the hollow arrow in the figure represents the airflow direction).

[0026] in, Figure 1 and Figure 2 middle:

[0027] 1-Rack body;

[0028] 10-Cabinet wall;

[0029] 10a-side cabinet wall;

[0030] 10b-top cabinet wall;

[0031] 10c - Base cabinet wall;

[0032] 101 - First air inlet;

[0033] 102 - First air outlet;

[0034] 11-Electrical housing cavity;

[0035] 12-Base;

[0036] 2-First fan;

[0037] 3-Air duct cavity;

[0038] 31 - Second air inlet;

[0039] 32-Second air outlet

[0040] 4-Second fan;

[0041] 5-Heat exchanger;

[0042] 51 - Evaporation end;

[0043] 52 - Condensation end;

[0044] 6-Power conversion equipment;

[0045] 61-Third fan. Detailed Implementation

[0046] The core of this application is to provide an electrical cabinet and electrical equipment to solve the problem that electrical cabinets cannot simultaneously meet the requirements for heat dissipation and protection.

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] With the rapid development of grid-connected power generation technology for new energy sources, electrical equipment (such as transformers and converters) is evolving towards higher power density and compactness. In new energy power generation systems, low-voltage power conversion equipment and medium-voltage electrical equipment work together to achieve efficient energy transmission. Medium-voltage electrical equipment typically includes transformers and switchgear units. To adapt to complex outdoor conditions (such as wind, sand, salt spray, and high humidity), this equipment must possess both efficient heat dissipation capabilities and high-level protection performance.

[0049] Currently, electrical cabinets for electrical equipment generally rely on open ventilation structures to exchange airflow with the external environment for heat dissipation (such as forced air cooling). For example, the electrical cabinets of dry-type transformers introduce external air through air ducts for thermal convection. However, open ventilation structures allow dust and particulate matter to easily penetrate the interior of the electrical cabinet, thereby affecting the insulation performance of related electrical components and easily causing partial discharge risks, resulting in poor protection. Although open ventilation structures are generally designed with dust filters, these filters are prone to clogging and require frequent maintenance. Therefore, existing electrical cabinets cannot simultaneously meet both heat dissipation and protection requirements.

[0050] Based on this, one embodiment of this application provides an electrical cabinet to solve the problem that electrical cabinets cannot simultaneously meet heat dissipation and protection requirements.

[0051] Reference Figure 1 The electrical cabinet provided in this application embodiment specifically includes a cabinet body 1 and a heat exchange section.

[0052] Specifically, the cabinet body 1 has multiple cabinet walls forming an electrical receiving cavity 11. This electrical receiving cavity 11 is mainly used to house electrical devices with related functions. For example, when this electrical cabinet is used for electrical equipment, the electrical receiving cavity 11 can house a power conversion device 6. At least some of the cabinet walls 10 are constructed as hollow cabinet walls. These hollow cabinet walls have a hollow structure, and can be specifically designed as double-layered cabinet walls 10, with a hollow structure forming between the two layers. Of course, to ensure a fixed connection between the two layers, the hollow structure should also have internal space... The hollow cabinet wall is equipped with a corresponding connection structure. It has a first air inlet 101 and a first air outlet 102. Both the first air inlet 101 and the first air outlet 102 are connected to the electrical receiving cavity 11. The hollow cabinet wall is equivalent to a section of air duct structure. It forms an internal circulation air duct with the electrical receiving cavity 11 through the first air inlet 101 and the first air outlet 102. The first air inlet 101 is mainly used to guide the airflow in the electrical receiving cavity 11 into the hollow cabinet wall. The first air outlet 102 is mainly used to guide the airflow in the hollow cabinet wall into the electrical receiving cavity 11.

[0053] Among them, at least some of the cabinet walls 10 are constructed as hollow cabinet walls. One of the multiple cabinet walls 10 can be constructed as a hollow cabinet wall, or two or more (including all) of the multiple cabinet walls 10 can be constructed as hollow cabinet walls. In addition, a certain cabinet wall 10 constructed as a hollow cabinet wall can be designed as a hollow structure in a partial area, or the entire cabinet wall 10 constructed as a hollow cabinet wall can be designed as a hollow structure.

[0054] For example, the cabinet body 1 may specifically include a side cabinet wall 10a, a top cabinet wall 10b, and a bottom cabinet wall 10c. The bottom cabinet wall 10c, side cabinet wall 10a, and top cabinet wall 10b enclose an electrical receiving cavity 11. The bottom cabinet wall 10c is the bottom wall enclosing the electrical receiving cavity 11, the side cabinet wall 10a is the circumferential wall enclosing the electrical receiving cavity 11, and the side cabinet wall 10a may have, but is not limited to, four sides, as long as it can satisfy the circumferential enclosure. The top cabinet wall 10b is the top wall enclosing the electrical receiving cavity 11. Specifically, a portion or the entire bottom cabinet wall 10c may be constructed as a hollow cabinet wall, a portion or the entire side cabinet wall 10a may be constructed as a hollow cabinet wall, and a portion or the entire top cabinet wall 10b may be constructed as a hollow cabinet wall. Among them, the bottom cabinet wall 10c, the side cabinet wall 10a and the top cabinet wall 10b can be designed as hollow cabinet walls, or two of them can be designed as hollow cabinet walls, or all three can be designed as hollow cabinet walls. In actual application, the configuration can be selected according to actual needs, and no specific restrictions are made here.

[0055] It is understandable that the base cabinet wall 10c is not necessary, that is, the cabinet body 1 may not have the base cabinet wall 10c. It is enclosed by the side cabinet wall 10a and the top cabinet wall 10b. During on-site installation, it is hoisted and installed outside the corresponding electrical equipment, and the bottom can be fixed by embedding it into the foundation of the installation site.

[0056] The heat exchange section is located on the outside of the cabinet body 1 and is arranged to exchange heat with the hollow cabinet wall, so that the heat from the hollow cabinet wall can be dissipated to the outside of the cabinet body 1 through the heat exchange section. The heat exchange section can exchange heat with both the hollow cabinet wall and the external environment of the cabinet body 1. The specific structure of the heat exchange section is not specifically limited here. For example, the heat exchange section can be a radiator, which is located on the outside of the cabinet body 1 and directly or indirectly contacts the hollow cabinet wall for heat exchange; it can also be the structure of the air duct cavity 3 described in later embodiments; or it can be a combination of the air duct cavity 3 and the heat exchanger 5.

[0057] In practical applications, this electrical cabinet features a hollow wall structure for at least a portion of its main body 10. This hollow wall connects to the electrical enclosure 11 within the main body 1 via a first air inlet 101 and a first air outlet 102. This allows airflow within the electrical enclosure 11 to flow from the first air inlet 101 into the hollow wall and back through the first air outlet 102, creating an internal airflow circulation within the cabinet. Simultaneously, a heat exchange unit is located on the outside of the main body 1 and is arranged to exchange heat with the hollow wall. As the airflow passes through the hollow wall, it exchanges heat with the external environment, thus fulfilling the need for heat dissipation from the electrical enclosure 11. Furthermore, the electrical enclosure 11 does not need to be connected to the external environment, preventing dust, particulate matter, and other impurities from entering the enclosure and significantly improving its protective performance. Therefore, the electrical cabinet provided in this application effectively balances both heat dissipation and protection requirements.

[0058] In some specific implementation plans, refer to Figure 1 As shown, the electrical cabinet may also include a first fan 2 disposed within the cabinet body 1. The first fan 2 is mainly used to allow airflow within the electrical housing cavity 11 to flow from the first air inlet 101 into the hollow cabinet wall, and then flow back into the electrical housing cavity 11 from the first air outlet 102. By designing the first fan 2, airflow circulation power can be provided for the internal airflow circulation formed between the electrical housing cavity 11 and the hollow cabinet wall.

[0059] For example, the first fan 2 can be specifically installed inside the electrical housing 11. Since the electrical housing 11 has a relatively spacious interior, it is more convenient to arrange the first fan 2. Of course, when there is enough space inside the hollow cabinet wall to install the fan, the first fan 2 can also be designed to be installed inside the hollow cabinet wall, or it can be arranged simultaneously in the electrical housing 11 and the hollow cabinet wall.

[0060] Another example is that the first fan 2 can be located at or near the first air inlet 101; it can also be located at or near the first air outlet 102; or it can be located between the first air inlet 101 and the first air outlet 102. In actual applications, the configuration can be selected according to actual needs, and no further specific limitations are made here.

[0061] Furthermore, there is no limit to the number of the first fan 2. In actual applications, the corresponding number of the first fan 2 can be selected and configured according to actual needs.

[0062] In other specific implementation plans, the following reference will continue to be made. Figure 1The aforementioned heat exchange section may specifically include an air duct cavity 3, which is located on the outside of the cabinet body 1. The air duct cavity 3 is arranged for heat exchange with the hollow cabinet wall but is not connected to it. That is, the air duct cavity 3 and the hollow structure of the hollow cabinet wall are not interconnected, but heat exchange can be achieved between the air duct cavity 3 and the hollow cabinet wall. For example, heat can be indirectly transferred between the air duct cavity 3 and the hollow cabinet wall through a heat exchanger 5, or the cavity wall of the air duct cavity 3 can be attached to the wall of the hollow cabinet wall away from the electrical housing cavity 11 for heat exchange, as long as heat exchange can be achieved. In addition, the air duct cavity 3 has a second air inlet 31 and a second air outlet 32. Both the second air inlet 31 and the second air outlet 32 ​​are connected to the external environment. Here, the external environment refers to the external environment of the electrical cabinet. For example, when the electrical cabinet is installed outdoors, the external environment specifically refers to the outdoor atmospheric environment; or when the electrical cabinet is installed in a computer room, the external environment specifically refers to the airflow environment inside the computer room.

[0063] By designing the heat exchange section into a structure including the air duct cavity 3, in practical applications, the external ambient airflow can flow into the air duct cavity 3 from the second air inlet 31 and flow out to the external environment from the second air outlet 32, thus forming an external airflow circulation outside the electrical cabinet. At the same time, since the air duct cavity 3 is arranged for heat exchange with the hollow cabinet wall but is not connected, the external ambient airflow can exchange heat with the airflow flowing inside the hollow cabinet wall when it flows through the air duct cavity 3. That is, the airflow flowing inside the internal airflow circulation can exchange heat with the airflow flowing outside the airflow circulation, thereby meeting the heat dissipation requirement of the electrical housing cavity 11 of the electrical cabinet. Meanwhile, the electrical housing cavity 11 does not need to be connected to the external environment, thus preventing dust, particulate matter and other impurities from the external environment from entering the electrical housing cavity 11, greatly improving the protective performance of the electrical cabinet.

[0064] In a further embodiment, the heat exchange unit may further include a second fan 4, which is disposed in the air duct cavity 3 and is used to allow airflow from the external environment to flow into the air duct cavity 3 from the second air inlet 31 and out to the external environment from the second air outlet 32. The specific location of the second fan 4 in the air duct cavity 3 can be selected according to actual needs. For example, the second fan 4 can be located at the second air inlet 31, the second air outlet 32, or both; no specific limitation is made here. Furthermore, the number of second fans 4 is not specifically limited and can be configured according to actual layout requirements. By designing this second fan 4, power can be provided for the airflow circulation between the air duct cavity 3 and the external environment, improving heat exchange efficiency.

[0065] It is understandable that the second fan 4 is not necessarily required. For example, when the application site of the electrical cabinet is a windy environment, the corresponding second fan 4 can be set or not, because in a windy environment, natural wind can also be used to make the airflow of the external environment circulate through the air duct cavity 3.

[0066] In some other specific implementation schemes, refer to Figure 1 In order to improve the heat exchange efficiency between the air duct cavity 3 and the hollow cabinet wall, the air duct cavity 3 and the hollow cabinet wall can exchange heat through a heat exchanger 5. The heat exchanger 5 has an evaporation end 51 and a condensation end 52. The evaporation end 51 is located in the hollow cabinet wall, and the condensation end 52 is located in the air duct cavity 3.

[0067] The specific structural form of the evaporator end 51 located in the hollow cabinet wall can be as follows: The evaporator end 51 can be located within the hollow structure of the hollow cabinet wall. This structural form increases the contact area between the evaporator end 51 and the airflow inside the hollow cabinet wall, which helps improve the heat absorption effect. Alternatively, the evaporator end 51 can be designed to be in close contact with the wall surface of the hollow cabinet wall away from the electrical receiving cavity 11 for heat exchange. This structural form can ensure the integrity of the outer wall surface of the hollow cabinet wall as much as possible, which helps to prevent airflow communication with the external environment. Another option is to construct the evaporator end 51 as part of the wall surface of the hollow cabinet wall away from the electrical receiving cavity 11. This structural form ensures direct contact heat exchange between the evaporator end 51 and the airflow inside the hollow cabinet wall, which can minimize the resistance of the evaporator end 51 to the airflow inside the hollow cabinet wall. In practical applications, the corresponding structural form can be selected according to actual needs; no further specific limitations are made here.

[0068] Furthermore, the specific structural form of the condenser end 52 located in the air duct cavity 3 can be that the condenser end 52 is located inside the air duct cavity 3. This structural form increases the contact area between the condenser end 52 and the airflow within the air duct cavity 3, thus improving heat dissipation. Alternatively, the condenser end 52 can be designed to fit against the outer wall of the air duct cavity 3 for heat exchange, or the condenser end 52 can be constructed as part of the outer wall of the air duct cavity 3. This structural design ensures direct contact heat exchange between the condenser end 52 and the airflow within the air duct cavity 3, minimizing the resistance of the condenser end 52 to the airflow within the air duct cavity 3 and further improving heat exchange efficiency. In practical applications, the appropriate structural form can be selected based on actual needs; no further specific limitations are made here.

[0069] Those skilled in the art will understand that the number of heat exchangers 5 described above can be one or more, for example, referring to Figure 2 As shown, there are two heat exchangers 5, which are relatively distributed. In actual applications, the number of heat exchangers 5 can be selected according to the actual layout requirements, and no further specific restrictions are made here.

[0070] In addition, the specific type of heat exchanger 5 can be, but is not limited to, a phase change heat exchanger, such as a single-phase heat exchanger (i.e., a non-phase change heat exchanger).

[0071] Taking heat exchanger 5 as an example, which is a phase change heat exchanger, the phase change heat exchanger has an evaporator end 51 and a condenser end 52 arranged from bottom to top. The evaporator end 51 is arranged for heat exchange with the hollow cabinet wall, and the condenser end 52 is arranged for heat exchange with the air duct cavity 3. Specifically, this phase change heat exchanger can absorb the heat of the airflow flowing through the hollow cabinet wall through the evaporator end 51. After absorbing the heat, the phase change medium will evaporate and vaporize. The vaporized phase change medium enters the condenser end 52, where it exchanges heat with the airflow flowing through the air duct cavity 3. After releasing the heat, it liquefies and flows back to the evaporator end 51. The airflow in the air duct cavity 3 carries the heat to the external environment. By designing a phase change heat exchanger on the electrical cabinet, the heat exchange efficiency between the air duct cavity 3 and the hollow cabinet wall can be improved, and the structure is simpler.

[0072] In some other specific implementation schemes, refer to Figure 1 Both the side cabinet wall 10a and the top cabinet wall 10b are constructed as hollow cabinet walls, and the hollow structure of the side cabinet wall 10a is connected to the hollow structure of the top cabinet wall 10b. In this case, the hollow structures of the side cabinet wall 10a and the top cabinet wall 10b form a connected air duct structure. Constructing the side cabinet wall 10a as a hollow cabinet wall improves the circumferential heat dissipation effect of the electrical components within the electrical housing cavity 11, and constructing the top cabinet wall 10b as a hollow cabinet wall improves the top heat dissipation effect of the electrical components within the electrical housing cavity 11.

[0073] In this configuration, where both the side wall 10a and the top wall 10b are constructed as hollow cabinet walls, and the hollow structure of the side wall 10a is connected to the hollow structure of the top wall 10b, the heat exchange unit can be optionally located on the wall surface of the side wall 10a facing away from the electrical receiving cavity 11; alternatively, the heat exchange unit can be located on the wall surface of the top wall 10b facing away from the electrical receiving cavity 11; or, heat exchange units can be located on both the wall surfaces of the side wall 10a and the top wall 10b facing away from the electrical receiving cavity 11. In practical applications, the arrangement can be selected according to actual needs, and no specific limitations are made here.

[0074] In a further implementation plan, refer to Figure 1As shown, when both the side cabinet wall 10a and the top cabinet wall 10b are constructed as hollow cabinet walls, and the hollow structure of the side cabinet wall 10a is connected to the hollow structure of the top cabinet wall 10b, the aforementioned first air inlet 101 can be located on the top cabinet wall 10b, and the first air outlet 102 can be located on the side cabinet wall 10a and arranged near the base 12. By designing this structure, the airflow within the electrical enclosure 11 will flow from bottom to top, which better conforms to the initial airflow direction design within the electrical cabinet. For example, if a dry-type transformer is installed in the electrical enclosure 11, a third fan 61 will be designed near the bottom of the dry-type transformer. The third fan 61 is used to blow the airflow from the bottom of the dry-type transformer to the top of the dry-type transformer. In this case, by setting the first air inlet 101 on the top cabinet wall 10b and the first air outlet 102 on the side cabinet wall 10a and arranged near the base 12, the airflow circulation capacity can be improved, thereby helping to improve the heat dissipation effect.

[0075] On the other hand, this application also provides an electrical device, including an electrical cabinet and a power conversion device 6, wherein the electrical cabinet is the electrical cabinet described in any of the above-mentioned solutions, and the power conversion device 6 is disposed within the electrical receiving cavity 11 of the electrical cabinet. Since the aforementioned electrical cabinet has the above-mentioned technical effects, the electrical device having this electrical cabinet should also have corresponding technical effects, which will not be elaborated further here.

[0076] For example, the power conversion device 6 mentioned above can be a dry-type transformer, or other power conversion devices 6 with heat dissipation and sealing protection requirements, such as inverters, rectifiers, converters, etc., without specific limitations.

[0077] When the power conversion device 6 is a dry-type transformer, a third fan 61 can be installed on the dry-type transformer. This third fan 61 is typically designed to be located near the bottom of the dry-type transformer. The third fan 61 is used to blow airflow from the bottom of the dry-type transformer towards the top. This is because cold airflow is usually concentrated near the bottom of the electrical cabinet. By having the third fan 61 blow airflow from bottom to top, cold airflow can continuously flow through the body of the dry-type transformer, helping to improve the heat dissipation effect.

[0078] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0080] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0081] It should also be noted that in the description of the embodiments of this application, the terms "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0082] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An electrical cabinet, characterized in that, include: The cabinet body (1) has an electrical receiving cavity (11). At least a portion of the cabinet wall (10) of the cabinet body (1) is constructed as a hollow cabinet wall. The hollow cabinet wall has a first air inlet (101) and a first air outlet (102). Both the first air inlet (101) and the first air outlet (102) are connected to the electrical receiving cavity (11). The heat exchange section is located on the outside of the cabinet body (1) and is arranged to exchange heat with the hollow cabinet wall.

2. The electrical cabinet as described in claim 1, characterized in that, The electrical cabinet also includes a first fan (2) disposed in the cabinet body (1). The first fan (2) is used to cause the airflow in the electrical housing cavity (11) to flow into the hollow cabinet wall from the first air inlet (101) and flow back into the electrical housing cavity (11) from the first air outlet (102).

3. The electrical cabinet as described in claim 2, characterized in that, The first fan (2) is located inside the hollow cabinet wall or inside the electrical housing cavity (11).

4. The electrical cabinet as described in any one of claims 1-3, characterized in that, The heat exchange section includes an air duct cavity (3), which is arranged to exchange heat with the hollow cabinet wall but not connected. The air duct cavity (3) has a second air inlet (31) and a second air outlet (32), both of which are connected to the external environment.

5. The electrical cabinet as described in claim 4, characterized in that, The heat exchange section also includes a second fan (4), which is disposed in the air duct cavity (3) and is used to allow the airflow from the external environment to flow into the air duct cavity (3) from the second air inlet (31) and flow out to the external environment from the second air outlet (32).

6. The electrical cabinet as described in claim 4, characterized in that, The air duct cavity (3) and the hollow cabinet wall exchange heat through a heat exchanger (5). The heat exchanger (5) has an evaporation end (51) and a condensation end (52). The evaporation end (51) is located on the hollow cabinet wall, and the condensation end (52) is located on the air duct cavity (3).

7. The electrical cabinet as described in any one of claims 1-3, characterized in that, The cabinet body (1) includes a side cabinet wall (10a), a top cabinet wall (10b) and a bottom cabinet wall (10c), which together form the electrical receiving cavity (11). Wherein, the bottom cabinet wall (10c) is constructed as a hollow cabinet wall; and / or, the side cabinet wall (10a) is constructed as a hollow cabinet wall; and / or, the top cabinet wall (10b) is constructed as a hollow cabinet wall.

8. The electrical cabinet as described in claim 7, characterized in that, Both the side cabinet wall (10a) and the top cabinet wall (10b) are constructed as hollow cabinet walls, and the hollow structure of the side cabinet wall (10a) is connected to the hollow structure of the top cabinet wall (10b). The heat exchange section is disposed on the side cabinet wall (10a) away from the electrical receiving cavity (11); or, the heat exchange section is disposed on the top cabinet wall (10b) away from the electrical receiving cavity (11).

9. The electrical cabinet as described in claim 8, characterized in that, The first air inlet (101) is located on the top cabinet wall (10b), and the first air outlet (102) is located on the side cabinet wall (10a) and is arranged close to the bottom cabinet wall (10c).

10. An electrical device, characterized in that, Includes an electrical cabinet as described in any one of claims 1-9 and a power conversion device (6) disposed in an electrical housing cavity (11) of the electrical cabinet.

11. The electrical equipment as claimed in claim 10, characterized in that, The power conversion device (6) is a dry-type transformer. A third fan (61) is provided at the bottom of the dry-type transformer. The third fan (61) is used to blow the airflow at the bottom of the dry-type transformer to the top of the dry-type transformer.

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