Layered master control assembly, frequency converter cabinet, air conditioning system

Abstract

The application provides a layered master control assembly, a frequency converter cabinet and an air conditioning system. The layered master control assembly comprises a master control frame, the master control frame comprises a first wall body and a second wall body which are arranged in sequence and at intervals along a first direction, a first assembly space for assembling a first electrical module is formed between the first wall body and the second wall body, and a second assembly space for assembling a second electrical module is formed on the side of the second wall body away from the first wall body. According to the application, the first wall body and the second wall body are arranged at intervals in front and back, the master control frame forms a front and back layered assembly structure, the electrical modules of the master control assembly can be arranged in different assembly spaces in layers according to different functional requirements, the layout is more reasonable, the structure is more compact, the volume is smaller, the occupied space is smaller, and the overall compact design of the frequency converter cabinet is facilitated; the layered arrangement structure can only disassemble the corresponding electrical module of the corresponding assembly space, and disassembly and maintenance are more convenient.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a layered main control component, a frequency converter cabinet, and an air conditioning system. Background Technology

[0002] With the continuous advancement and development of electronic technology, electrical control technology and its equipment are also gradually improving. Low-power (e.g., below 100kW) electrical control cabinets have been widely used in heavy industry, water supply systems, central air conditioning, elevator operation, and other fields. Currently, the structural design technology of electrical control cabinets is still immature, resulting in large size, difficult maintenance and installation, and high failure rates for low-power cabinets. With the trend towards miniaturization, high power density, and high protection in electrical control cabinets, it is necessary to overcome technical challenges such as component installation and layout difficulties. Existing frequency converter equipment often arranges various components within a cabinet or separate chamber, connected by wires, leading to problems such as unreasonable generalized assembly, non-compact structure, and inconvenient maintenance and disassembly. Summary of the Invention

[0003] Therefore, the present invention provides a layered main control component, inverter cabinet, and air conditioning system, which can overcome the shortcomings of the related technologies, such as unreasonable layout of the main control component in the inverter cabinet, non-compact structure, and inconvenient maintenance and disassembly.

[0004] To address the aforementioned issues, the present invention provides a layered master control component, comprising a master control frame. The master control frame includes a first wall and a second wall arranged sequentially at intervals along a first direction. A first assembly space for assembling a first electrical module is formed between the first wall and the second wall. A second assembly space for assembling a second electrical module is formed on the side of the second wall away from the first wall.

[0005] In some embodiments, a third wall is connected to the first end of the first wall and the first end of the second wall, and a capacitor assembly mounting base is connected to the third wall corresponding to the first assembly space. The first electrical module includes a capacitor assembly, which is connected to the capacitor assembly mounting base and is located within the first assembly space.

[0006] In some embodiments, a fourth wall is connected to the second end of the first wall and the second end of the second wall, the second end of the first wall is opposite to the first end of the first wall, and the second end of the second wall is opposite to the first end of the second wall; and / or, a stacked busbar is connected to the end of the capacitor assembly away from the capacitor assembly mounting base.

[0007] In some embodiments, the second wall has a support portion extending toward the first assembly space and connected to the first wall, the support portion having a capacitor through hole.

[0008] In some embodiments, the second electrical module includes a power device assembly connected to the second wall.

[0009] In some embodiments, the second wall body is further connected to a first support base on the side opposite to the first wall body, the first support base is connected to a first insulator, and a rectifier output copper busbar is supported and connected to the first insulator; and / or, the third wall body has a first connecting plate at the position where it connects to the second wall body, and a plurality of second insulators are connected to the side of the first connecting plate facing the outside of the main control frame, and an inverter output copper busbar is supported and connected to each second insulator.

[0010] In some embodiments, the third wall and the fourth wall are connected by a fifth wall. With reference to the actual application orientation of the main control frame, the third wall, the fifth wall, and the fourth wall are projected onto a horizontal plane in sequence to form a U-shape, and the fifth wall has an open area that communicates with the second assembly space.

[0011] In some embodiments, a sixth wall is also connected to the side of the fifth wall facing the outside of the main control frame, and one side of the sixth wall is hinged to the corresponding side of the fifth wall.

[0012] In some embodiments, the sixth wall has an outer wall surface away from the fifth wall, on which a main control board and / or a sampling board are assembled.

[0013] In some embodiments, the sixth wall has an inner wall facing the fifth wall, on which a bearing switching power supply and / or a discharge resistor plate are assembled.

[0014] The present invention also provides a frequency converter cabinet, including a cabinet, wherein the layered main control components as described above are assembled inside the cabinet.

[0015] In some embodiments, the bottom region of the housing is provided with an internal circulation heat exchange module, which has an air outlet and an air return outlet, and the layered main control component is mounted and assembled in the region above the air outlet.

[0016] In some embodiments, the enclosure is further equipped with a terminal block assembly and a reactor assembly, the terminal block assembly and the reactor assembly being arranged horizontally at intervals in the area above the return air inlet.

[0017] The present invention also provides an air conditioning system, including the frequency converter cabinet described above.

[0018] This invention provides a layered main control component, inverter cabinet, and air conditioning system. By using a first wall and a second wall arranged at intervals, the main control frame forms a layered assembly structure. This allows the electrical modules of the main control component to be arranged in different assembly spaces according to different functional requirements, resulting in a more reasonable layout, a more compact structure, a smaller size, and less space occupation, which is beneficial for the overall compact design of the inverter cabinet. In addition, the layered arrangement structure allows for the disassembly of only the corresponding electrical modules in the respective assembly spaces, making disassembly and maintenance more convenient. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the layered main control component according to an embodiment of the present invention from one perspective;

[0020] Figure 2 This is a three-dimensional structural diagram of the layered main control component according to an embodiment of the present invention from another perspective.

[0021] Figure 3 for Figure 1 A three-dimensional structural diagram of the main control framework from a single perspective;

[0022] Figure 4 for Figure 1 A three-dimensional structural diagram of the main control framework from another perspective;

[0023] Figure 5 for Figure 3 A schematic diagram of an integrated structure of the third, fourth, and fifth walls in the main control frame;

[0024] Figure 6 for Figure 3 A schematic diagram of the structure of the second wall in the structure;

[0025] Figure 7 This is a schematic diagram of the external structure of a frequency converter cabinet according to another embodiment of the present invention;

[0026] Figure 8 for Figure 7 A schematic diagram of the layout of each module inside the frequency converter cabinet.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1. Main control frame; 11. First wall; 111. Capacitor assembly mounting base; 12. Second wall; 121. Support; 122. Capacitor through hole; 123. First support base; 13. Third wall; 131. First connecting plate; 14. Fourth wall; 15. Fifth wall; 16. Sixth wall; 161. Hinge; 162. Rear plate; 163. Discharge resistor plate mounting component; 17. Support; 21. Terminal block assembly; 22. Reactor assembly; 23. Circuit breaker assembly; 2 4. Micro-device assembly; 25. Internal circulation heat exchange module; 101. Capacitor assembly; 102. Laminated busbar; 201. Power device assembly; 202. First insulator; 203. Second insulator; 204. Rectifier output copper busbar; 205. Inverter output copper busbar; 206. Current sensor; 301. Main control board; 302. Sampling board; 303. Bearing switching power supply; 401. Front door panel; 402. Top cover; 403. Vertical plate; 404. Lifting ring; 405. Terminal box. Detailed Implementation

[0029] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a hierarchical main control component is provided, including a main control frame 1. The main control frame 1 includes a first wall 11 and a second wall 12 arranged sequentially at intervals along a first direction. A first assembly space for assembling a first electrical module is formed between the first wall 11 and the second wall 12. A second assembly space for assembling a second electrical module is formed on the side of the second wall 12 away from the first wall 11. When the hierarchical main control component is assembled in the enclosure of a frequency converter cabinet, the aforementioned first direction can specifically be a direction from the rear side of the enclosure toward the enclosure door panel, that is, the first wall 11 is closer to the rear upright panel of the enclosure than the second wall 12. In a specific embodiment, the first wall 11 and the second wall 12 are arranged parallel to each other at intervals. In this technical solution, the first wall 11 and the second wall 12, arranged at intervals, form a layered assembly structure for the main control frame 1. This allows the electrical modules of the main control component to be arranged in different assembly spaces according to different functional requirements, resulting in a more rational layout, a more compact structure, a smaller size, and less space occupation, which is beneficial for the overall compact design of the inverter cabinet. Furthermore, the layered structure allows for the disassembly of only the corresponding electrical modules in each assembly space, making disassembly and maintenance more convenient. It should be noted that during the assembly of the main control component, the individual electrical modules integrated on its exterior can be assembled first, and then the layered main control component can be assembled entirely inside the cabinet, making assembly very convenient and improving assembly efficiency.

[0030] In some embodiments, a third wall 13 is connected (e.g., welded) to the first end of the first wall 11 and the first end of the second wall 12. A capacitor assembly mounting base 111 is connected to the third wall 13 corresponding to the first assembly space. The first electrical module includes a capacitor assembly 101, which is connected to the capacitor assembly mounting base 111 and located within the first assembly space. That is, the assembly direction of the capacitor assembly 101 in the rear assembly space under the assembled state is parallel to the planar extension direction of the first wall 11. When the capacitor assembly 101 is disassembled or assembled, the various electrical modules in the second assembly space in front of it will not pose an obstacle to its disassembly. Correspondingly, in some specific cases, the top cover of the inverter cabinet can be designed to be detachable or a detachable operation window can be provided at the corresponding side panel position to realize the disassembly or assembly of the capacitor assembly 101. The end of capacitor assembly 101 furthest from capacitor assembly mounting base 111 is connected to a stacked busbar 102, integrating the stacked busbar 102 with capacitor assembly 101 into a single unit. This results in a more compact structure, eliminating the need for a separate support structure for the stacked busbar 102 and further simplifying the overall design. The aforementioned capacitor assembly mounting base 111 is formed into a "U" shape by bending sheet metal, allowing it to be welded to the third wall 13.

[0031] In some embodiments, a fourth wall 14 is connected (e.g., welded) to the second end of the first wall 11 and the second end of the second wall 12, with the second end of the first wall 11 facing the first end of the first wall 11, and the second end of the second wall 12 facing the first end of the second wall 12. Thus, the connection of the first wall 11, the second wall 12, the third wall 13, and the fourth wall 14 forms a stable frame structure that is approximately cubic, thereby improving the reliability of the structure.

[0032] In some embodiments, the second wall 12 has a support portion 121 extending toward the first assembly space and connected to the first wall 11, which can ensure the distance between the first wall 11 and the second wall 12. The support portion 121 has a capacitor through hole 122. When the capacitor assembly 101 is assembled in the first assembly space, the capacitor assembly 101 passes through the capacitor through hole 122. It should be noted that the aperture of the capacitor through hole 122 matches the outer diameter of the capacitor body in the capacitor assembly 101 (for example, the sizes are equal or the aperture of the capacitor through hole 122 is slightly larger). So that after the capacitor assembly 101 is assembled, the hole wall of the capacitor through hole 122 can support the end of the capacitor assembly 101 away from the capacitor assembly mounting base 111, ensuring the connection reliability and positional stability of the capacitor assembly 101.

[0033] In some embodiments, the second electrical module includes a power device assembly 201 connected to the second wall 12. As is known in the industry, the power device assembly 201 includes a heat sink and a rectifier-inverter power module. In this technical solution, the power device assembly 201 is positioned within the second assembly space, allowing each module on the power device assembly 201 to be positioned facing the operator, facilitating observation and maintenance of the components. The heat sink of the power device assembly 201 is a refrigerant heat sink, which has higher heat dissipation efficiency. The refrigerant can be from a corresponding air conditioning system, and the corresponding refrigerant interface is fixed to the housing.

[0034] In some embodiments, the side of the second wall 12 facing away from the first wall 11 is also connected to a first support base 123, on which a first insulator 202 is connected, and a rectifier output copper busbar 204 is supported and connected; and / or, the third wall 13 has a first connecting plate 131 at the position where it connects to the second wall 12, and multiple second insulators 203 are connected to the side of the first connecting plate 131 facing the outside of the main control frame 1, and each second insulator 203 is supported and connected to an inverter output copper busbar 205. The aforementioned rectifier output copper busbar 204 and inverter output copper busbar 205 are both located near the second assembly space, and in specific applications, they are electrically connected to the rectifier and inverter power modules in the power device assembly 201, respectively. The circuit layout is more reasonable, and it can also prevent the power module terminals from breaking due to the shaking of the copper busbar during the packaging and transportation of the inverter cabinet, which greatly improves the reliability of the inverter cabinet. As needed for signal detection or control monitoring, at least one inverter output copper busbar 205 is connected to a current sensor 206 for detecting the current on the corresponding inverter output copper busbar 205. In some embodiments, the third wall 13 and the fourth wall 14 are connected by a fifth wall 15. Taking the actual application orientation of the main control frame 1 as a reference, projected on a horizontal plane, the third wall 13, the fifth wall 15, and the fourth wall 14 are sequentially connected to form a U-shape, and the fifth wall 15 has an open area communicating with the second assembly space. In a specific embodiment, the aforementioned U-shape can be formed by bending a sheet metal part, and each wall can be hollowed out to construct a corresponding assembly operation space (operation window, through hole, etc.). The edges of each wall can also be constructed with corresponding threaded connection holes or wiring through holes.

[0035] In some embodiments, a sixth wall 16 is connected to the side of the fifth wall 15 facing the outside of the main control frame 1. One side of the sixth wall 16 is hinged to the corresponding side of the fifth wall 15 via a hinge 161, thereby enabling the sixth wall 16 and the fifth wall 15 to open and close. This further ensures that more electrical modules can be assembled and integrated on the main control frame 1 without hindering the assembly and disassembly of each module. It is understood that the sixth wall 16 is also used to assemble some electrical modules. In a specific embodiment, the sixth wall 16 has an outer wall surface away from the fifth wall 15, on which the main control board 301 and / or sampling board 302 are assembled. The sixth wall 16 also has an inner wall surface facing the fifth wall 15, on which a bearing switching power supply 303 (the MOS transistors and transformer devices on it generate a lot of heat) and / or a discharge resistor board are assembled. In this technical solution, the inner and outer walls of the sixth wall 16 are fully utilized, further optimizing the layout of the main control frame 1 and making the structure more compact. In another embodiment, a rear plate 162 is connected to the inner wall of the sixth wall 16. The cross-section of the rear plate 162 is approximately U-shaped, and the opening of the U-shape is connected to the inner wall. In this case, the bearing switching power supply 303 is assembled on the side of the rear plate 162 facing the sixth wall 16, and a discharge resistor plate mounting component 163 is connected to the side of the rear plate 162 away from the sixth wall 16. The aforementioned discharge resistor plate is connected to the discharge resistor plate mounting component 163.

[0036] It should be noted that the main control frame 1 is made of sheet metal bending, hollowing and splicing (welding). The corresponding sheet metal (i.e. different wall) solid structure has corresponding wire holes, threaded connection holes, grounding holes, etc. These features are relatively conventional designs and are not explicitly indicated in this invention.

[0037] According to an embodiment of the present invention, a frequency converter cabinet is also provided, including a housing, in which the layered main control component as described above is assembled. An internal circulation heat exchange module 25 is provided in the bottom area of ​​the housing, ensuring a high protection level for the frequency converter cabinet. This module has an air outlet and an air return outlet. The layered main control component is mounted above the air outlet. For example, the bottom of the layered main control component and the top of the internal circulation heat exchange module 25 are fixedly connected by two parallel strip-shaped supports 17. By mounting the layered main control component at the air outlet of the internal circulation heat exchange module 25, efficient heat dissipation of the main control component can be achieved using the cooling airflow from the air outlet. In particular, the position of the air outlet is directly opposite the position of the bearing switching power supply 303, ensuring cooling of the bearing switching power supply 303. It should be noted that the air outlet of the internal circulation heat exchange module 25, located in the bottom area of ​​the housing, corresponds to the layered main control component, which can fully utilize the gravity effect of the cooling air flowing from the air outlet, allowing the cold air to stay within the main control frame for a longer time, thereby improving the heat dissipation effect.

[0038] In some embodiments, the enclosure also houses a terminal block assembly 21 and a reactor assembly 22. The terminal block assembly 21 and reactor assembly 22 are arranged horizontally, spaced back-to-back, above the return air vent. This front-to-back arrangement of the terminal block assembly 21 and reactor assembly 22 improves space utilization within the enclosure. The enclosure also houses a circuit breaker assembly 23 and / or a micro-device assembly 24 (integrating an AC contactor, switching device, relay, and thermostat), located in the top area of ​​the enclosure. This modular layout of the electrical modules within the enclosure results in a more rational and compact internal space arrangement for the inverter cabinet, leading to a smaller overall size.

[0039] According to an embodiment of the present invention, an air conditioning system is also provided, including the frequency converter cabinet described above.

[0040] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0041] The above are merely preferred embodiments of the present invention and are 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. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A hierarchical master control component, characterized in that, The system includes a main control frame (1), which includes a first wall (11) and a second wall (12) arranged sequentially at intervals along a first direction. A first assembly space for assembling a first electrical module is formed between the first wall (11) and the second wall (12). A second assembly space for assembling a second electrical module is formed on the side of the second wall (12) away from the first wall (11). When the layered main control components are assembled in the cabinet of the inverter cabinet, the first direction is from the rear side of the cabinet towards the side of the cabinet door. A third wall (13) is connected to the first end of the first wall (11) and the first end of the second wall (12). A capacitor is connected to the third wall (13) corresponding to the first assembly space. The first electrical module includes a capacitor assembly (101) mounted on the capacitor assembly mounting base (111) and located within the first assembly space. The assembly direction of the capacitor assembly (101) is parallel to the planar extension direction of the first wall (11). The second wall (12) has a support portion (121) extending toward the first assembly space and connected to the first wall (11). The support portion (121) has a capacitor through hole (122). After the capacitor assembly (101) is assembled, the hole wall of the capacitor through hole (122) can support the end of the capacitor assembly (101) away from the capacitor assembly mounting base (111).

2. The hierarchical master control component according to claim 1, characterized in that, A fourth wall (14) is connected to the second end of the first wall (11) and the second end of the second wall (12), the second end of the first wall (11) is opposite to the first end of the first wall (11), and the second end of the second wall (12) is opposite to the first end of the second wall (12); and / or, a stacked busbar (102) is connected to the end of the capacitor assembly (101) away from the capacitor assembly mounting base (111).

3. The hierarchical master control component according to claim 1, characterized in that, The second electrical module includes a power device assembly (201) connected to the second wall (12).

4. The hierarchical master control component according to claim 3, characterized in that, The second wall (12) is connected to a first support base (123) on the side away from the first wall (11). A first insulator (202) is connected to the first support base (123). A rectifier output copper busbar (204) is supported and connected to the first insulator (202). And / or, the third wall (13) has a first connecting plate (131) at the position where it is connected to the second wall (12). A plurality of second insulators (203) are connected to the side of the first connecting plate (131) facing the outside of the main control frame (1). An inverter output copper busbar (205) is supported and connected to each second insulator (203).

5. The hierarchical master control component according to claim 2, characterized in that, The third wall (13) and the fourth wall (14) are connected by the fifth wall (15). With the actual application orientation of the main control frame (1) as a reference, the third wall (13), the fifth wall (15) and the fourth wall (14) are projected on the horizontal plane in sequence to form a U-shape, and the fifth wall (15) has an open area that communicates with the second assembly space.

6. The hierarchical master control component according to claim 5, characterized in that, The fifth wall (15) is connected to a sixth wall (16) on the side facing the outside of the main control frame (1), and one side of the sixth wall (16) is hinged to the corresponding side of the fifth wall (15).

7. The hierarchical master control component according to claim 6, characterized in that, The sixth wall (16) has an outer wall surface away from the fifth wall (15), on which a main control board (301) and / or a sampling board (302) are assembled.

8. The hierarchical master control component according to claim 7, characterized in that, The sixth wall (16) has an inner wall facing the fifth wall (15), on which a bearing switching power supply (303) and / or a discharge resistor plate are assembled.

9. A frequency converter cabinet, comprising a housing, characterized in that, The housing is equipped with a layered master control component as described in any one of claims 1 to 8.

10. The frequency converter cabinet according to claim 9, characterized in that, The bottom area of ​​the box is provided with an internal circulation heat exchange module (25), which has an air outlet and an air return outlet. The layered main control component is mounted and assembled in the area above the air outlet.

11. The frequency converter cabinet according to claim 10, characterized in that, The enclosure is also equipped with a terminal block assembly (21) and a reactor assembly (22), which are arranged horizontally at intervals in the area above the return air inlet.

12. An air conditioning system, characterized in that, The inverter cabinet includes any one of claims 9 to 11.

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