CN216162603U

CN216162603U - Frequency converter and air conditioning unit

Info

Publication number: CN216162603U
Application number: CN202122219518.2U
Authority: CN
Inventors: 归柒荣; 孙瑞祥; 刘玲; 丛国强
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-01
Anticipated expiration: 2031-09-14

Abstract

The utility model provides a frequency converter and an air conditioning unit, wherein the frequency converter comprises a cabinet body and a plurality of component assemblies in the cabinet body, each component assembly comprises a mounting plate and at least one component to be assembled on the mounting plate, and the plurality of components to be assembled and the corresponding mounting plates are assembled into the component assemblies outside the cabinet body and then assembled in the cabinet body. According to the frequency converter, the plurality of component assemblies can be assembled outside the accommodating range of the cabinet body in a modularized manner and then moved to corresponding positions in the accommodating range of the cabinet body for assembly and connection, so that the difficulty or inconvenience caused by directly assembling or maintaining related component units in the accommodating range of the cabinet body due to the compact design of the cabinet body in the prior art can be effectively avoided, and the assembly and maintenance work efficiency of the frequency converter is improved.

Description

Frequency converter and air conditioning unit

Technical Field

The utility model belongs to the technical field of air conditioning, and particularly relates to a frequency converter and an air conditioning unit.

Background

Under the situation of continuous progress and development of electronic technology, the development of frequency converter technology and equipment thereof is gradually perfected, and for diode high-power frequency converters, the frequency converter has been widely used, for example: heavy industry, water supply construction systems, central air conditioning, elevator operation, etc. However, the development and development of the domestic frequency converter do not form a complete system, and the structural design of the frequency converter is not yet mature, so that the existing high-power frequency converter is large in size, low in maintenance and installation level and high in failure rate, and some technical problems such as heat dissipation problem, high-power safety interval and process problem need to be overcome along with the development trend of miniaturization, high power density and high protection of the frequency converter.

Aiming at the problems of small size, compact structure and difficult heat dissipation of a low-power frequency converter, internal key devices are easily damaged or the service life of the devices is reduced. Meanwhile, the frequency converter equipment has more electric devices, so that the layout requirement on the devices in the frequency converter is higher. For some high-protection high-power frequency converters, the size, the installation of devices in a cabinet and the layout of electric devices are often difficult to meet the requirements according to the common design principle.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a frequency converter and an air conditioning unit, which can overcome the defects of difficult installation and inconvenient maintenance of internal components of the frequency converter with compact structure in the related technology.

In order to solve the above problems, the present invention provides a frequency converter, including a cabinet body and a plurality of component assemblies located in the cabinet body, where the component assemblies include mounting plates and at least one component to be assembled on the mounting plates, and the plurality of components to be assembled and the corresponding mounting plates are assembled into the component assemblies outside the cabinet body and then assembled in the cabinet body.

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

In some embodiments, the components and parts subassembly pass through the first side of mounting panel with the cabinet body is articulated, the second side of mounting panel with the cabinet body can be dismantled and be connected, first side with the second side is in the opposite sides of mounting panel.

In some embodiments, the component assembly comprises a bearing power switch assembly, the mounting plate comprises a first mounting plate, and the component to be assembled comprises a bearing power switch; and/or, the components and parts subassembly includes the main control subassembly, the main control subassembly include the second mounting panel and install in main control components and parts on the second mounting panel.

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

In some embodiments, a cooling assembly is further disposed in the cabinet body, and the cooling assembly has an air outlet and an air return opening, and the air outlet corresponds to the position of the bearing power switch.

In some embodiments, the air return is in a lower region of the air outlet.

In some embodiments, the cooling assembly includes an air duct housing, an evaporator, and a fan assembly, the air outlet and the air return opening are configured on the air duct housing, the evaporator and the fan assembly are located in the air duct housing, the evaporator is disposed corresponding to the air return opening, and the fan assembly is disposed corresponding to the air outlet.

In some embodiments, the projection of the air duct housing on the rear side plate is in a shape of a Chinese character 'tu', the air outlet is located at an upper position of the shape of the Chinese character 'tu', and the air return opening is located at a lower position of the shape of the Chinese character 'tu'.

In some embodiments, the component assembly further comprises a power module assembly including a fifth mounting board and a power module mounted on the fifth mounting board.

In some embodiments, the fifth mounting plate is at least partially in contact with an outer sidewall of the duct housing, and the fifth mounting plate is in contact with the duct housing at a location between the air outlet and the air return.

In some embodiments, the cabinet is configured with a power line inlet, an outer side of the power line inlet is covered with a line inlet box, a box body of the line inlet box is configured with a plurality of threading holes, and the threading holes are staggered with each other in a vertical direction and/or a horizontal direction.

In some embodiments, the cabinet body comprises a rear side plate, a left side plate and a right side plate, and the rear side plate, the left side plate and the right side plate are formed by bending sheet metal parts into a U shape.

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

The utility model also provides an air conditioning unit which comprises the frequency converter.

According to the frequency converter and the air conditioning unit, the plurality of component assemblies can be assembled outside the accommodating range of the cabinet body in a modularized manner and then shifted to the corresponding positions in the accommodating range of the cabinet body for assembly and connection, so that the difficulty or inconvenience caused by directly assembling or maintaining related component units in the accommodating range of the cabinet body due to the compact design of the cabinet body in the prior art can be effectively avoided, and the assembly and maintenance work efficiency of the frequency converter is improved.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a frequency converter according to an embodiment of the present invention (parts such as a main control assembly are not shown in the figure to show the structure behind the main control assembly);

fig. 2 is a schematic diagram of an internal structure of a frequency converter according to an embodiment of the present invention (parts such as a bearing power switch are not shown in the figure to show the structure behind the parts);

fig. 3 is a schematic diagram of an internal structure of the frequency converter according to the embodiment of the present invention (parts such as a door panel are not shown in the figure to show the structure behind the figure);

FIG. 4 is a cross-sectional view of the frequency converter of FIG. 1 (the arrows show the direction of flow of the cooling air);

fig. 5 is a perspective external view of the frequency converter in fig. 1;

FIG. 6 is a schematic view of the internal structure of the cooling module of FIG. 1;

FIG. 7 is a schematic perspective view of the air duct housing of FIG. 6;

fig. 8 is a schematic perspective view of the inlet box in fig. 1.

The reference numerals are represented as:

1. a cabinet body; 11. a rear side plate; 12. a left side plate; 13. a right side plate; 14. a top plate; 15. a base plate; 16. A door panel; 2. a bearing power switch assembly; 21. a first mounting plate; 22. a bearing power switch; 32. a main control component; 41. a capacitive component; 42. a busbar; 51. a micro device; 61. an air outlet; 62. an air return opening; 63. an air duct housing; 631. mounting a seat plate; 64. an evaporator; 65. a fan assembly; 71. a fifth mounting plate; 72. a power module; 73. a heat sink; 8. a wire inlet box; 81. threading holes; 91. a reactor; 92. a circuit breaker; 93. an emergency stop button; 94. a door lock; 95. an operating status indicator light; 96. terminal block.

Detailed Description

Referring to fig. 1 to 8 in combination, according to an embodiment of the present invention, there is provided a frequency converter, including a cabinet 1 and a plurality of component assemblies located in the cabinet 1, it will be appreciated that the cabinet 1 comprises 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 plate 11, the left side plate 12, the right side plate 13, the top plate 14 and the bottom plate 15 are assembled together to form a cubic structure with an opening at one side, the door plate 16 is detachably connected to the opening, therefore, the cabinet body 1 forms an accommodating space with a certain protection level, the component assembly comprises a mounting plate and at least one component to be assembled on the mounting plate, and a plurality of components to be assembled and corresponding mounting plates are assembled in the cabinet body 1 after being assembled into the component assembly outside the cabinet body 1. In this technical scheme, it is a plurality of the components and parts subassembly can be in after the accommodation range of the cabinet body 1 finishes assembling with the modular mode, shift to corresponding position assembly connection in the accommodation range of the cabinet body 1 can effectively avoid among the prior art because the compact design of the cabinet body 1 leads to directly being in relevant components and parts monomer the difficulty or inconvenience that assembly or maintenance brought in the accommodation range of the cabinet body 1 promotes the equipment and the maintenance work efficiency of converter.

The component assembly comprises a bearing power switch assembly 2, the mounting plate comprises a first mounting plate 21, and the component to be assembled comprises a bearing power switch 22; and/or, the components and parts subassembly includes the master control subassembly, the master control subassembly include the second mounting panel and install in master control components and parts 32 on the second mounting panel. The component assembly can further comprise a capacitor busbar assembly, wherein the capacitor busbar assembly comprises a third mounting plate, and a capacitor assembly 41 and a busbar 42 which are mounted on the third mounting plate; and/or the component assembly comprises a secondary circuit assembly, and the secondary circuit assembly comprises a fourth mounting plate and a micro device 51 mounted on the fourth mounting plate. It is to be understood that the components of the various component assemblies may be flexibly selected and assembled according to the functional requirements of the assemblies, and are not limited to the specific examples described above.

In some embodiments, the component assembly is hinged to the cabinet body 1, so that the component assembly can be opened and closed relative to the rear side plate 11 of the cabinet body 1 (generally, it is ensured that the component assembly can be opened and closed by 90 °), so that the component assembly can be controlled to be at different opening and closing angles according to actual requirements when being maintained, and meanwhile, the component assembly can be formed in a containing range in the cabinet body 1 to achieve a stacking effect from the rear side plate 11 to the door panel 16, and the maintenance of the component assembly behind the component assembly is not affected when being maintained, so that the compactness of assembly of components in the cabinet body 1 can be further facilitated while the maintenance process is improved.

The components and parts subassembly passes through the first side of mounting panel with the cabinet body is articulated, the second side of mounting panel with the connection can be dismantled to the cabinet body, first side with the second side is in the relative both sides of mounting panel, for example the second side with realize dismantling the connection through the bolt between the corresponding fixed plate of the cabinet body, thereby guarantee the position reliability and stability of components and parts subassembly.

In other embodiments, a cooling assembly is further disposed in the cabinet body 1, the cooling assembly has an air outlet 61 and an air return opening 62, the air outlet 61 and the air return opening 62 are both located in the cabinet body 1, so as to achieve an internal circulation cooling effect on the air flow in the cabinet body 1, and preferably, the air outlet 61 corresponds to the position of the bearing power switch 22, so as to achieve efficient cooling and heat dissipation on the maximum heat source in the cabinet body 1, that is, the bearing power switch 22. In some embodiments, the air return opening 62 is located in a lower area of the air outlet 61, so that the characteristic of relatively high density of cold air can be utilized to make the air flow of the internal circulation more fluid, thereby improving the heat exchange cooling efficiency. In this case, it is preferable that a component (for example, the reactor 91 or the power module) having a relatively large amount of heat generation among the component modules be provided in a corresponding region below the outlet 61. In other embodiments, a corresponding air guiding partition (not shown) is disposed outside the air outlet 61, and the air guiding partition can guide part of the air outlet 61 to an upper region of the accommodating space of the cabinet 1, so as to cool the component assembly located in the upper region as required.

In some embodiments, the cooling assembly includes an air duct housing 63, an evaporator 64, and a fan assembly 65 (specifically, for example, a motor having a fan blade and driving the fan blade to rotate), the air outlet 61 and the air return opening 62 are configured on the air duct housing 63, the evaporator 64 and the fan assembly 65 are located in the air duct housing 63, the evaporator 64 is disposed corresponding to the air return opening 62, and the fan assembly 65 is disposed corresponding to the air outlet 61, while it can be understood that a corresponding water receiving tray is further disposed in the air duct housing 63 to be able to receive condensed water that may be formed by the evaporator 64, and the evaporator 64 is communicated with an external cold source (for example, an air conditioning unit) through a corresponding pipeline.

The air duct shell 63 is in projection on the rear side plate 11 is in a convex shape, the air outlet 61 is located at the upper position of the convex shape, the air return port 62 is located at the lower position of the convex shape, the air duct shell 63 is in the convex shape, the space occupied volume of the air duct shell 63 can be reduced, the space in the cabinet body 1 is facilitated to be simplified, the arrangement position selection range of each component assembly is larger, and the layout is more flexible. It should be noted that, based on the optimization of the manufacturing process, the portion of the air duct housing 63 corresponding to the upper portion of the convex shape is made by bending a metal plate, the portion of the air duct housing 63 corresponding to the lower portion of the convex shape is made by bending a metal plate, and the two portions are respectively bent and formed and then are spliced to form the convex shape and then are welded into a whole. The outer wall of the air duct shell 63 can also be used as a fixing carrier of cables, so that the wiring is more regular and reasonable.

In some embodiments, as described above, the component assembly further comprises a power module assembly, the power module assembly includes a fifth mounting plate 71 and a power module 72 mounted on the fifth mounting plate, and, at this time, the fifth mounting plate 71 is at least partially in contact with the outer side wall of the air duct housing 63, and the contact position of the fifth mounting plate 71 and the air duct shell 63 is between the air outlet 61 and the air return opening 62, because the evaporator 64 is located at the air return opening 62, at this time, the air flow inside the air duct housing 63 corresponding to the area where the air duct housing 63 contacts the fifth mounting plate 71 is cold air flow (cooled by the evaporator), the power module assembly, which also includes the heat sink 73, can thus be cooled by means of heat transfer, while also being structurally more compact.

As a specific implementation form, one side of the air duct casing 63 has a mounting seat plate 631, one end of the fifth mounting plate 71 is connected to the mounting seat plate 631, 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 at the right side and the left side of the air duct casing 63, and the fifth mounting plate 71 may further be provided with corresponding threaded holes for positioning components such as insulators adjacent thereto.

In some embodiments, a power line inlet is configured on the cabinet body 1 to allow an external power line (e.g., a power line) to be introduced into the cabinet body 1, an inlet box 8 is covered on an outer side of the power line inlet to improve the protection level of the cabinet body 1, a plurality of threading holes 81 are configured on a box body of the inlet box 8, and the threading holes 81 are vertically and/or horizontally staggered with each other, so that the phenomenon of interference when a threading rubber ring is installed after the inlet box 8 limits the length and width dimension can be prevented.

The alternating current component module and the direct current component module, the strong current component module and the weak current component module, the main loop component module and the secondary loop component module, the main control component module and the auxiliary component module in the component assembly are respectively and separately arranged in different areas in the cabinet body 1, in order to prevent the occurrence of interference phenomena between modules with different characteristics, for example, a strong electric component module (e.g. a power module) may cause electric interference to a weak electric component module (e.g. a main control module), an ac component module may cause electric interference to a dc component module, and so on, as a specific implementation manner, as can be seen in fig. 1, it is possible to arrange the ac component module in the upper right corner region of the cabinet 1, for example, in the C region, to arrange the dc component module in the upper left corner region of the cabinet 1, e.g., region D, while the power element modules may be arranged in a lower region of the cabinet 1, e.g., region E.

In some embodiments, the rear side plate 11, the left side plate 12, and the right side plate 13 are formed by bending a whole sheet metal part (i.e., a sheet metal plate) into a U shape, so as to improve the overall protection capability of the cabinet body 1, at this time, the top plate 14 is fully welded to the upper side edges 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 side edges of the rear side plate 11, the left side plate 12, and the right side plate 13, so as to further ensure the sealing performance of the overall structure of the cabinet body 1. A door lock 94 and a plurality of operation status indicators 95, such as a power indicator, an operation indicator, a fault indicator and a charging indicator, are disposed on the outer side of the door panel 16, an emergency stop button 93 may also be disposed thereon, a wiring terminal row 96 may also be connected to the left side plate 12 of the cabinet body 1, and a circuit breaker 92 is further disposed in the cabinet body 1.

According to an embodiment of the utility model, an air conditioning unit is also provided, which comprises the frequency converter.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The frequency converter is characterized by comprising a cabinet body (1) and a plurality of component assemblies in the cabinet body (1), wherein each component assembly comprises a mounting plate and at least one component to be assembled on the mounting plate, and the plurality of components to be assembled and the corresponding mounting plates are assembled in the cabinet body (1) after being assembled into the component assembly outside the cabinet body (1).

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 a rear side plate (11) of the cabinet (1).

3. The frequency converter according to claim 2, wherein the component assembly is hinged to the cabinet (1) through a first side of the mounting plate, a second side of the mounting plate is detachably connected to the cabinet (1), and the first side and the second side are located at two opposite sides of the mounting plate.

4. A frequency converter according to any one of claims 2 to 3, characterized in that the component assembly comprises a bearing power switch assembly (2), the mounting plate comprises a first mounting plate (21), and the component to be assembled comprises a bearing power switch (22); and/or, the components and parts subassembly includes the master control subassembly, the master control subassembly include the second mounting panel and install in master control components and parts (32) on the second mounting panel.

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

6. The frequency converter according to claim 4, characterized in that a cooling assembly is further arranged in the cabinet body (1), the cooling assembly has an air outlet (61) and an air return opening (62), and the position of the air outlet (61) corresponds to the position of the bearing power switch (22).

7. Frequency converter according to claim 6, characterized in that the return air opening (62) is in the area below the outlet opening (61).

8. The frequency converter according to claim 7, wherein the cooling assembly comprises an air duct housing (63), an evaporator (64), and a fan assembly (65), the air outlet (61) and the air return opening (62) are configured on the air duct housing (63), the evaporator (64) and the fan assembly (65) are located in the air duct housing (63), the evaporator (64) is disposed corresponding to the air return opening (62), and the fan assembly (65) is disposed corresponding to the air outlet (61).

9. The frequency converter according to claim 8, characterized in that 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 in an upper position of the convex shape and the air return opening (62) is in a lower position of the convex shape.

10. The frequency converter of claim 8, wherein the component assembly further comprises a power module assembly including a fifth mounting plate (71) and a power module (72) mounted on the fifth mounting plate (71).

11. Frequency converter according to claim 10, characterized in that the fifth mounting plate (71) is at least partially in contact with the outer side wall of the air duct housing (63), and the position of contact of the fifth mounting plate (71) with the air duct housing (63) is between the air outlet (61) and the air return opening (62).

12. The frequency converter according to claim 1, characterized in that the cabinet body (1) is configured with a power line inlet, the power line inlet is covered with a wire inlet box (8) at the outer side, the box body of the wire inlet box (8) is configured with a plurality of threading holes (81), and the threading holes (81) are staggered with each other in the vertical direction and/or the horizontal direction.

13. The frequency converter according to claim 2, wherein the cabinet body (1) comprises a rear side plate (11), a left side plate (12) and a right side plate (13), and the rear side plate (11), the left side plate (12) and the right side plate (13) are formed by bending sheet metal parts into a U shape.

14. The frequency converter according to claim 13, wherein the cabinet body (1) further comprises a top plate (14) and a bottom plate (15), 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).

15. Air conditioning assembly comprising an inverter, characterized in that the inverter is according to any of claims 1 to 14.