CN216056774U

CN216056774U - Frequency converter and air conditioning unit

Info

Publication number: CN216056774U
Application number: CN202122219441.9U
Authority: CN
Inventors: 归柒荣; 孙瑞祥; 刘玲
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: 2022-03-15
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 cooling assembly arranged in the cabinet body, the cooling assembly comprises an air duct shell, an evaporator and a fan assembly, the evaporator and the fan assembly are arranged in the air duct shell, and an air outlet and an air return opening are formed in the air duct shell. According to the utility model, the components in the cabinet body are radiated in an internal circulation mode, an air inlet and an air return port communicated with the outside are not required to be formed in the cabinet body, the protection grade of the cabinet body can be improved, meanwhile, the cabinet body is not required to reserve a corresponding airflow flowing space aiming at the air inlet and the air return port, and the requirement of the frequency converter on the installation space is reduced.

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. For the diode frequency converter, with the development trend of miniaturization, high power density and high protection of the frequency converter, some technical problems, such as heat dissipation problem, high-voltage safety interval and process problem, and device life problem, need to be overcome.

To the heat dissipation of converter, draw forth to outside mode after the external cold wind entering the internal portion heat transfer of converter cabinet among the prior art more adopts, and this kind of mode can realize effectively dispelling the heat to the internal portion components and parts of cabinet, but has converter cabinet body protection level on the low side, the great not enough of installation space demand.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a frequency converter and an air conditioning unit, which can overcome the defects of low protection level and large requirement on installation space of a frequency converter cabinet body in the related technology.

In order to solve the above problems, the present invention provides a frequency converter, which includes a cabinet body and a cooling assembly disposed in the cabinet body, wherein the cooling assembly includes an air duct casing, an evaporator, and a fan assembly, the evaporator and the fan assembly are disposed in the air duct casing, and an air outlet and an air return opening are configured on the air duct casing.

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

In some embodiments, a bearing power switch is assembled in the cabinet body, and the position of the bearing power switch corresponds to the position of the air outlet.

In some embodiments, the first mounting plate is configured with threading holes that extend through a thickness of the first mounting plate; and/or, the bearing power switch assembly passes through the first side of first mounting panel with cabinet body swing joint, the second side of first mounting panel with the cabinet body can dismantle the connection, the first side with the second side is in the relative both sides of first mounting panel.

In some embodiments, the evaporator is disposed corresponding to the air return opening, the fan assembly is disposed corresponding to the air outlet, the power module assembly includes a fifth mounting plate and a power module mounted on the fifth mounting plate, the fifth mounting plate is at least partially in contact with an outer side wall of the air duct housing, and a contact position of the fifth mounting plate and the air duct housing is between the air outlet and the air return opening.

In some embodiments, the bearing power switch assembly is hingedly connected to the cabinet via a first side of the first mounting plate.

In some embodiments, at least one of a capacitor assembly, a busbar, a reactor, and a power module assembly is assembled within the lower region.

In some embodiments, a first mounting plate is further disposed in the cabinet body, the bearing power switch is assembled on the first mounting plate to form a bearing power switch assembly, and the first mounting plate is movably connected to the cabinet body, so that the bearing power switch assembly can be opened and closed relative to a rear side plate of the cabinet body.

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

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 components in the cabinet body are radiated in an internal circulation mode, an air inlet and an air return port communicated with the outside do not need to be formed in the cabinet body, the protection grade of the cabinet body can be improved, meanwhile, a corresponding airflow flowing space does not need to be reserved for the air inlet and the air return port in the cabinet body, and the requirement of the frequency converter on the installation space is reduced.

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 movably connected (for example, hinged) to the cabinet 1, so that the component assembly can be opened and closed (generally, it is ensured that the component assembly can be opened and closed by 90 °) relative to the rear side plate 11 of the cabinet 1, and thus, 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 form a stacking effect in the direction from the rear side plate 11 to the door panel 16 in the accommodating range in the cabinet 1, and the maintenance of the component assembly behind the component assembly is not affected when being maintained, and the maintenance process can be further facilitated while the compactness of the assembly of components in the cabinet 1 is improved.

The components and parts subassembly passes through the first side of mounting panel with but the cabinet body swing joint, the second side of mounting panel with the cabinet body is dismantled and is connected, the 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 some embodiments, the first mounting plate 21 is configured with a threading hole, the threading hole penetrates through the thickness of the first mounting plate 21, so as to enable the first mounting plate 21 to be assembled with wiring routing of the bearing power switch 22, specifically, the threading holes are arranged along the lower edge of the first mounting plate 21 at intervals, so that the cable of the bearing power switch 22 can be routed to the first side, that is, the movable connection position, along the second side of the first mounting plate 21, and further connected with components such as a wiring row on the cabinet body 1, so that the circuit layout is more reasonable and clear, and interference and disorder between circuits are reduced.

In other embodiments, a cooling assembly is further disposed in the cabinet 1, the cooling assembly has an air outlet 61 and an air return opening 62, both the air outlet 61 and the air return opening 62 are located in the cabinet 1, thereby realizing the internal circulation cooling effect of the airflow in the cabinet body 1, radiating the components in the cabinet body 1 by adopting the internal circulation mode in the technical scheme, not needing to arrange an air inlet and an air return port communicated with the outside on the cabinet body 1, being capable of improving the protection grade of the cabinet body 1, meanwhile, the cabinet body 1 does not need to reserve corresponding airflow flowing space for the air inlet and the air outlet, the requirement of the frequency converter on the installation space is reduced, preferably, the air outlet 61 corresponds to the position of the bearing power switch 22, therefore, the maximum heat source in the cabinet body 1, namely, the bearing power switch 22, can be efficiently cooled and radiated. 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 utility model provides a frequency converter, its characterized in that, including the cabinet body (1) and be in cooling module in the cabinet body (1), cooling module includes wind channel casing (63), evaporimeter (64), fan subassembly (65) are in wind channel casing (63), construct air outlet (61) and return air inlet (62) on wind channel casing (63).

2. Frequency converter according to claim 1, characterized in that the return air opening (62) is in the area below the outlet opening (61).

3. Frequency converter according to claim 2, characterized in that a bearing power switch (22) is assembled in the cabinet body (1), and the position of the bearing power switch (22) corresponds to the position of the air outlet (61).

4. The frequency converter according to claim 3, wherein a first mounting plate (21) is further disposed in the cabinet (1), the bearing power switch (22) is assembled on the first mounting plate (21) to form a bearing power switch assembly, and the first mounting plate (21) is movably connected to the cabinet (1) so that the bearing power switch assembly can be opened and closed relative to a rear side plate (11) of the cabinet (1).

5. Frequency converter according to claim 4, characterized in that the first mounting plate (21) is configured with threading holes which extend through the thickness of the first mounting plate (21); and/or, the bearing power switch assembly pass through the first side of first mounting panel (21) with cabinet body (1) swing joint, the second side of first mounting panel (21) with the connection can be dismantled to cabinet body (1), first side with the second side is in the relative both sides of first mounting panel (21).

6. Frequency converter according to claim 5, characterized in that said bearing power switch assembly is hinged to said cabinet (1) through a first side of said first mounting plate (21).

7. Frequency converter according to claim 2, characterized in that at least one of a capacitor assembly (41), a busbar (42), a reactor (91), a power module assembly is assembled in the lower area.

8. The frequency converter according to claim 7, wherein the evaporator (64) is disposed corresponding to the air return opening (62), the fan assembly (65) is disposed corresponding to the air outlet opening (61), the power module assembly comprises a fifth mounting plate (71) and a power module (72) mounted on the fifth mounting plate (71), the fifth mounting plate (71) is at least partially in contact with an outer side wall of the air duct housing (63), and a contact position of the fifth mounting plate (71) and the air duct housing (63) is between the air outlet opening (61) and the air return opening (62).

9. The frequency converter according to claim 1, characterized in that the projection of the air duct housing (63) on the rear side plate (11) of the cabinet (1) is in a convex shape, the air outlet (61) is at the upper position of the convex shape, and the air return opening (62) is at the lower position of the convex shape.

10. The frequency converter according to claim 1, 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.

11. The frequency converter according to claim 10, 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).

12. Air conditioning assembly comprising an inverter, characterized in that the inverter is according to any of claims 1 to 11.