Inverter, air conditioning unit

Abstract

The present invention provides an inverter and an air-conditioning unit, wherein the inverter includes a cabinet and a plurality of component assemblies within the cabinet, wherein the component assemblies include a mounting plate and at least one component to be assembled on the mounting plate, wherein the plurality of components to be assembled and the corresponding mounting plates are assembled outside the cabinet to form the component assemblies, which are then assembled within the cabinet. According to the present invention, the plurality of component assemblies can be assembled in a modular manner outside the cabinet's accommodation range and then moved to corresponding positions within the cabinet's accommodation range for assembly and connection. This can effectively avoid the difficulties or inconveniences caused by directly assembling or maintaining the relevant component units within the cabinet's accommodation range due to the cabinet's compact design in the prior art, thereby improving the efficiency of the inverter's assembly and maintenance work.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to a frequency converter and an air conditioning unit. Background Art

[0002] With the continuous advancement and development of electronic technology, the development of inverter technology and its equipment is also gradually improving. High-power diode inverters have been widely used in applications such as heavy industry, water supply systems, central air conditioning, and elevator operation. However, the research and development of domestic inverters has not yet formed a complete system, and the design of inverter structures is also immature. As a result, current high-power inverters are large in size, have poor maintenance and installation levels, and have high failure rates. With the development trend of inverters towards miniaturization, high power density, and high protection, it is necessary to overcome certain technical issues, such as heat dissipation, strong current safety spacing, and process issues.

[0003] The small size, compact structure, and heat dissipation challenges of low-power VFDs can easily damage key internal components or reduce their service life. Furthermore, VFDs incorporate numerous electrical components, placing high demands on the layout of the internal components. Conventional design principles for high-power, high-protection VFDs often struggle to meet these requirements in terms of size, cabinet installation, and electrical layout. Summary of the Invention

[0004] Therefore, the present invention provides a frequency converter and an air-conditioning unit, which can overcome the shortcomings of the related art in that the internal components of the compact frequency converter are difficult to install and inconvenient to maintain.

[0005] In order to solve the above problems, the present invention provides an inverter, including a cabinet and a plurality of component assemblies located in the cabinet, the component assembly including a mounting plate and at least one component to be assembled assembled on the mounting plate, and the plurality of components to be assembled and the corresponding mounting plates are assembled outside the cabinet into the component assembly and then assembled into the cabinet.

[0006] In some embodiments, the component assembly is hinged to the cabinet, so that the component assembly can be opened and closed relative to a rear side panel of the cabinet.

[0007] In some embodiments, the component assembly is hinged to the cabinet via a first side of the mounting plate, a second side of the mounting plate is detachably connected to the cabinet, and the first side and the second side are located on opposite sides of the mounting plate.

[0008] In some embodiments, the component assembly includes a bearing power switch assembly, the mounting plate includes a first mounting plate, and the components to be assembled include a bearing power switch; and / or, the component assembly includes a main control assembly, the main control assembly includes a second mounting plate and a main control component mounted on the second mounting plate.

[0009] In some embodiments, the component assembly includes a capacitor busbar assembly, which includes a third mounting plate and a capacitor assembly and a busbar mounted on the third mounting plate; and / or, the component assembly includes a secondary circuit assembly, which includes a fourth mounting plate and a micro device mounted on the fourth mounting plate.

[0010] In some embodiments, a cooling assembly is further provided in the cabinet, and the cooling assembly has an air outlet and an air return outlet, and the air outlet corresponds to the position of the bearing power switch.

[0011] In some embodiments, the return air outlet is located in a lower area of ​​the air outlet.

[0012] In some embodiments, the cooling component includes an air duct housing, an evaporator, and a fan assembly. The air outlet and return air outlet are constructed on the air duct housing. The evaporator and fan assembly are located in the air duct housing. The evaporator is set corresponding to the return air outlet, and the fan assembly is set corresponding to the air outlet.

[0013] In some embodiments, the projection of the air duct housing on the rear side panel is in a convex shape, and the air outlet is located at an upper position of the convex shape, and the return air outlet is located at a lower position of the convex shape.

[0014] In some embodiments, the component assembly further includes a power module assembly, and the power module assembly includes a fifth mounting plate and a power module mounted on the fifth mounting plate.

[0015] In some embodiments, the fifth mounting plate at least partially contacts the outer side wall of the air duct housing, and the contact position of the fifth mounting plate and the air duct housing is between the air outlet and the return air outlet.

[0016] In some embodiments, a power line inlet is constructed on the cabinet body, and a wire entry box is provided on the outer cover of the power line inlet. The box body of the wire entry box is constructed with multiple wire threading holes, and the multiple wire threading holes are staggered with each other in the vertical direction and / or horizontal direction.

[0017] In some embodiments, the cabinet includes a rear side panel, a left side panel, and a right side panel, and the rear side panel, the left side panel, and the right side panel are formed by bending sheet metal into a U shape.

[0018] In some embodiments, the cabinet body also includes a top plate and a bottom plate, the top plate is fully welded to the upper edges of the rear side plate, left side plate, and right side plate, and the bottom plate is fully welded to the lower edges of the rear side plate, left side plate, and right side plate.

[0019] The present invention also provides an air-conditioning unit, comprising the above-mentioned inverter.

[0020] The present invention provides an inverter and an air-conditioning unit, in which a plurality of component assemblies can be assembled in a modular manner outside the accommodation range of the cabinet and then moved to corresponding positions within the accommodation range of the cabinet for assembly and connection. This can effectively avoid the difficulties or inconveniences caused by directly assembling or maintaining related component units within the accommodation range of the cabinet due to the compact design of the cabinet in the prior art, thereby improving the assembly and maintenance efficiency of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the internal structure of the frequency converter according to an embodiment of the present invention (some components, such as the main control assembly, are omitted in the figure to illustrate the subsequent structure);

[0022] Figure 2 Schematic diagram of the internal structure of the frequency converter according to an embodiment of the present invention (some components such as the bearing power switch are omitted in the figure to illustrate the subsequent structure);

[0023] Figure 3 Schematic diagram of the internal structure of the frequency converter according to an embodiment of the present invention (some components such as the door panel are omitted in the figure to illustrate the subsequent structure);

[0024] Figure 4 for Figure 1 Cross-sectional view of the inverter in FIG (the arrows in the figure show the direction of the cooling air flow);

[0025] Figure 5 for Figure 1 The three-dimensional appearance of the inverter in the figure;

[0026] Figure 6 for Figure 1 Schematic diagram of the internal structure of the cooling component;

[0027] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure of the air duct housing;

[0028] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the incoming line box.

[0029] The reference numerals indicate:

[0030] 1. Cabinet; 11. Rear side panel; 12. Left side panel; 13. Right side panel; 14. Top panel; 15. Bottom panel; 16. Door panel; 2. Bearing power switch assembly; 21. First mounting plate; 22. Bearing power switch; 32. Main control components; 41. Capacitor assembly; 42. Busbar; 51. Micro devices; 61. Air outlet; 62. Return air outlet; 63. Duct shell; 631. Mounting plate; 64. Evaporator; 65. Fan assembly; 71. Fifth mounting plate; 72. Power module; 73. Radiator; 8. Wire entry box; 81. Wire hole; 91. Reactor; 92. Circuit breaker; 93. Emergency stop button; 94. Door lock; 95. Operation status indicator light; 96. Terminal block. DETAILED DESCRIPTION

[0031] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, an inverter is provided, including a cabinet 1 and a plurality of component assemblies in the cabinet 1. It can be understood that the cabinet 1 includes a rear side panel 11, a left side panel 12, a right side panel 13, a top panel 14, a bottom panel 15 and a door panel 16, wherein the rear side panel 11, the left side panel 12, the right side panel 13, the top panel 14 and the bottom panel 15 are assembled together to form a cubic structure with an opening on one side, and the door panel 16 is detachably connected to the opening, so that the cabinet 1 forms a accommodating space with a certain level of protection, and the component assembly includes a mounting plate and at least one component to be assembled on the mounting plate, and a plurality of the components to be assembled and the corresponding mounting plates are assembled into the component assembly outside the cabinet 1 and then assembled into the cabinet 1. In this technical solution, multiple component assemblies can be assembled in a modular manner outside the accommodation range of the cabinet 1 and then moved to corresponding positions within the accommodation range of the cabinet 1 for assembly and connection. This can effectively avoid the difficulties or inconveniences caused by directly assembling or maintaining related component units within the accommodation range of the cabinet 1 due to the compact design of the cabinet 1 in the prior art, thereby improving the assembly and maintenance efficiency of the inverter.

[0032] The component assembly includes a bearing power switch assembly 2, the mounting plate includes a first mounting plate 21, and the components to be assembled include a bearing power switch 22; and / or, the component assembly includes a main control assembly, the main control assembly includes a second mounting plate and a main control component 32 mounted on the second mounting plate. The component assembly may also include a capacitor busbar assembly, the capacitor busbar assembly includes a third mounting plate and a capacitor assembly 41 and a busbar 42 mounted on the third mounting plate; and / or, the component assembly includes a secondary circuit assembly, the secondary circuit assembly includes a fourth mounting plate and a micro device 51 mounted on the fourth mounting plate. It is understandable that, according to the requirements of the component function, the components in the various component assemblies can be flexibly selected and assembled, and are not limited to the aforementioned specific examples.

[0033] In some embodiments, the component assembly is hinged to the cabinet 1 so that the component assembly can open and close relative to the rear side panel 11 of the cabinet 1 (generally ensuring that it can open and close 90°). In this way, the component assembly can be controlled to be at different opening and closing angles according to actual needs when being repaired. At the same time, the component assembly can also form a stacking effect from the rear side panel 11 to the door panel 16 within the accommodating range of the cabinet 1 without affecting the repair of the component assembly behind it during maintenance. While improving the compactness of the assembly of components in the cabinet 1, it can also further facilitate the maintenance process.

[0034] The component assembly is hinged to the cabinet through the first side of the mounting plate, and the second side of the mounting plate is detachably connected to the cabinet. The first side and the second side are located on opposite sides of the mounting plate. For example, the second side and the corresponding fixing plate of the cabinet are detachably connected by bolts, thereby ensuring the stable and reliable position of the component assembly.

[0035] In other embodiments, a cooling component is further provided in the cabinet 1, and the cooling component has an air outlet 61 and a return air outlet 62. The air outlet 61 and the return air outlet 62 are both located in the cabinet 1, thereby achieving an internal circulation cooling effect on the airflow in the cabinet 1. Preferably, the air outlet 61 corresponds to the position of the bearing power switch 22, thereby achieving efficient cooling and heat dissipation of the largest heat source in the cabinet 1, namely the bearing power switch 22. In some embodiments, the return air outlet 62 is located in the lower area of ​​the air outlet 61, so that the characteristic of the high density of cold air can be utilized to make the internal circulation airflow more fluid, thereby improving the heat exchange and cooling efficiency. It can be understood that at this time, it is best to set the components with relatively large heat generation in the component assembly (such as the inductor 91 and the power module assembly) in the corresponding area below the air outlet 61. In other embodiments, a corresponding air guide baffle (not shown in the figure) is provided on the outside of the air outlet 61, and the air guide baffle can guide part of the air flow from the air outlet 61 to the upper area of ​​the storage space of the cabinet 1, so as to perform necessary cooling on the components and assemblies in the upper area.

[0036] In some embodiments, the cooling component includes an air duct housing 63, an evaporator 64, and a fan assembly 65 (specifically, for example, having fan blades and a motor to drive the blades to rotate), the air outlet 61 and the return air outlet 62 are constructed on the air duct housing 63, the evaporator 64 and the fan assembly 65 are located in the air duct housing 63, and the evaporator 64 is arranged corresponding to the return air outlet 62, and the fan assembly 65 is arranged corresponding to the air outlet 61. It can be understood that a corresponding water receiving tray is also provided in the air duct housing 63 to receive the condensed water that may be formed by the evaporator 64, and the evaporator 64 is connected to an external cold source (such as an air-conditioning unit) through corresponding pipelines.

[0037] The projection of the air duct housing 63 on the rear side panel 11 is in the shape of a convex character, and the air outlet 61 is located at the upper position of the convex character, and the return air outlet 62 is located at the lower position of the convex character. The convex-shaped air duct housing 63 can reduce the space occupied by the air duct housing 63, which is conducive to streamlining the space inside the cabinet 1, making the layout position selection range of each component assembly larger and the layout more flexible. It should be noted that, based on the optimization of the manufacturing process, the part of the air duct housing 63 corresponding to the upper part of the convex character is made by sheet metal bending, and the part of the air duct housing 63 corresponding to the lower part of the convex character is made by sheet metal bending. The two parts are bent and formed separately and then assembled to form a convex character and then welded together. The outer wall of the air duct housing 63 can also be used as a fixed carrier for cables, making the wiring more regular and reasonable.

[0038] In some embodiments, as described above, the component assembly also includes a power module assembly, and the power module assembly includes a fifth mounting plate 71 and a power module 72 mounted on the fifth mounting plate. At this time, the fifth mounting plate 71 is at least partially in contact with the outer wall of the air duct shell 63, and the contact position between the fifth mounting plate 71 and the air duct shell 63 is between the air outlet 61 and the return air outlet 62. Since the evaporator 64 is at the return air outlet 62, the airflow inside the air duct shell 63 corresponding to the area where the air duct shell 63 contacts the fifth mounting plate 71 is a cold airflow (cooled by the evaporator), so that the power module assembly can be cooled by heat transfer, and the structure is more compact. The power module assembly also includes a radiator 73.

[0039] As a specific implementation form, one side of the air duct housing 63 has a mounting base plate 631, one end of the fifth mounting plate 71 is connected to the mounting base plate 631, and the other end of the fifth mounting plate 71 is connected to the left side plate 12 of the cabinet 1. The one end and the other end of the fifth mounting plate 71 are respectively located on the right and left sides of the air duct housing 63. Corresponding threaded holes can also be provided on the fifth mounting plate 71 to position adjacent components such as insulators.

[0040] In some embodiments, a power line inlet is constructed on the cabinet body 1 for introducing external power lines (such as power lines) into the interior of the cabinet body 1. The outer cover of the power line inlet is provided with a wire entry box 8, which can improve the protection level of the cabinet body 1. The box body of the wire entry box 8 is constructed with multiple wire threading holes 81, and the multiple wire threading holes 81 are staggered with each other in the vertical direction and / or horizontal direction. This can prevent interference from occurring when installing the wire rubber ring after the length and width of the wire entry box 8 are limited.

[0041] The AC component module and the DC component module, the strong current component module and the weak current component module, the main circuit component module and the secondary circuit component module, the main control component module and the auxiliary component module in the component assembly are respectively separated and arranged in different areas within the cabinet 1 to prevent interference between modules with different characteristics. For example, the strong current component module (such as the power module) will cause electrical interference to the weak current component (such as the main control module) module, and the AC component module will cause electrical interference to the DC component module, etc. As a specific implementation method, combined with Figure 1 It can be seen that the AC component module can be arranged in the upper right corner area of ​​the cabinet 1, such as area C, the DC component module can be arranged in the upper left corner area of ​​the cabinet 1, such as area D, and the power component module can be arranged in the lower area of ​​the cabinet 1, such as area E.

[0042] In some embodiments, the rear side panel 11, left side panel 12, and right side panel 13 are formed by bending a single piece of sheet metal (i.e., a sheet metal plate) into a U-shape, thereby improving the overall protective capability of the cabinet 1. In this case, the top panel 14 is fully welded to the upper edges of the rear side panel 11, left side panel 12, and right side panel 13, and the bottom panel 15 is fully welded to the lower edges of the rear side panel 11, left side panel 12, and right side panel 13, further ensuring the sealing of the overall structure of the cabinet 1. The outer side of the door panel 16 is provided with a door lock 94 and a plurality of operating status indicator lights 95, such as a power indicator light, an operating indicator light, a fault indicator light, and a charging indicator light, etc., and an emergency stop button 93 may also be provided thereon. A terminal block 96 may also be connected to the left side panel 12 of the cabinet 1. A circuit breaker 92 is also provided inside the cabinet 1.

[0043] According to an embodiment of the present invention, there is further provided an air-conditioning unit, comprising the above-mentioned inverter.

[0044] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0045] 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 shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A frequency converter, characterized in that: The invention comprises a cabinet (1) and a plurality of component assemblies located in the cabinet (1), wherein the component assembly comprises a mounting plate and at least one component to be assembled on the mounting plate, wherein the plurality of components to be assembled and the corresponding mounting plates are assembled outside the cabinet (1) into the component assembly and then assembled in the cabinet (1); the component assembly comprises a bearing power switch assembly (2); a cooling assembly is further provided in the cabinet (1), wherein the cooling assembly has an air outlet (61) and an air return outlet (62), wherein the air outlet (61) corresponds to the position of the bearing power switch (22); the cooling assembly comprises an air duct housing (63), an evaporator (64), and a fan assembly (65), wherein the air outlet (61) and the air return outlet (62) are constructed on the air duct housing (63), and the evaporator (64) and the fan assembly (65) are located in the air duct housing (63), and The evaporator (64) is arranged corresponding to the return air port (62), and the fan assembly (65) is arranged corresponding to the air outlet (61); the component assembly further includes a power module assembly, and the power module assembly includes a fifth mounting plate (71) and a power module (72) mounted on the fifth mounting plate (71); the fifth mounting plate (71) at least partially contacts the outer side wall of the air duct housing (63), and the contact position between the fifth mounting plate (71) and the air duct housing (63) is between the air outlet (61) and the return air port (62), and the power module assembly further includes a heat sink (73); the projection of the air duct housing (63) on the rear side plate (11) is in a convex shape, and the air outlet (61) is located at the upper position of the convex shape, the return air port (62) is located at the lower position of the convex shape, and the evaporator (64) is located at the lower position of the convex shape.

2. The frequency converter according to claim 1, characterized in that: The component assembly is hinged to the cabinet (1) so that the component assembly can be opened and closed relative to the rear side panel (11) of the cabinet (1).

3. The frequency converter according to claim 2, characterized in that: The component assembly is hinged to the cabinet (1) via a first side of the mounting plate, and a second side of the mounting plate is detachably connected to the cabinet (1), wherein the first side and the second side are located on opposite sides of the mounting plate.

4. The frequency converter according to any one of claims 1 to 3, characterized in that: The mounting plate includes a first mounting plate (21), and the components to be assembled include a bearing power switch (22); and / or the component assembly includes a main control assembly, and the main control assembly includes a second mounting plate and a main control component (32) mounted on the second mounting plate.

5. The frequency converter according to claim 1, characterized in that: The component assembly includes a capacitor busbar assembly, the capacitor busbar assembly includes a third mounting plate and a capacitor assembly (41) and a busbar (42) mounted on the third mounting plate; and / or the component assembly includes a secondary circuit assembly, the secondary circuit assembly includes a fourth mounting plate and a micro device (51) mounted on the fourth mounting plate.

6. The frequency converter according to claim 1, characterized in that: The return air port (62) is located in a lower area of ​​the air outlet (61).

7. The frequency converter according to claim 1, characterized in that: The cabinet (1) is provided with a power line inlet, an outer cover of the power line inlet is provided with a line entry box (8), a box body of the line entry box (8) is provided with a plurality of line threading holes (81), and the plurality of line threading holes (81) are staggered with each other in the vertical direction and / or the horizontal direction.

8. The frequency converter according to claim 1, characterized in that: The cabinet body (1) comprises a rear side panel (11), a left side panel (12), and a right side panel (13); the rear side panel (11), the left side panel (12), and the right side panel (13) are formed by bending sheet metal into a U shape.

9. The frequency converter according to claim 8, characterized in that: The cabinet body (1) further comprises a top plate (14) and a bottom plate (15), wherein the top plate (14) is fully welded to the upper sides of the rear side plate (11), the left side plate (12), and the right side plate (13), and the bottom plate (15) is fully welded to the lower sides of the rear side plate (11), the left side plate (12), and the right side plate (13).

10. An air conditioning unit, comprising a frequency converter, characterized in that: The frequency converter is the frequency converter according to any one of claims 1 to 9.

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