CN204498004U - A kind of compact inverter - Google Patents

Abstract

The utility model discloses a compact inverter, which comprises a cabinet. The cabinet includes a rear door panel. The lower part of the cabinet is provided with an air inlet and the upper part is provided with an air outlet screen hole. The inside of the cabinet is separated by a vertical sealing plate. The DC cabinet and the AC cabinet are arranged in sequence. The DC cabinet is divided into a confluence control part in the front and a concentrated heat dissipation part in the rear by a vertical partition. The confluence control part includes the upper control circuit installation area and the lower DC confluence area. Partly divided by the upper horizontal partition and the lower horizontal partition into the upper fan compartment, the middle power module area and the lower reactor area, at least one fan is arranged in the fan compartment, and the power module area includes the air duct cavity and the power module , the power module is arranged in the air duct cavity, and a radiator is arranged in the power module. The utility model has the characteristics of compact structure, strong electromagnetic compatibility and low cost.

Description

A compact inverter

technical field

The utility model relates to the technical field of photovoltaic power generation, in particular to a compact inverter.

Background technique

Solar energy is an emerging green energy. Because it is clean, efficient and not limited by geographical resources, it has the advantages of safety, reliability, no noise, no pollution, less constraints, low failure rate, and easy maintenance. It can be widely used in social life. Various fields, especially applied to photovoltaic grid-connected power station systems.

In recent years, the research and development of inverters has gradually developed towards miniaturization, light weight and economicalization while improving reliability.

The traditional high-power inverter is limited by the heat dissipation capacity of the radiator. In order to keep the temperature rise of the IGBT fixed on the radiator within the specified range, the two main heat sources of the inverter (power module and reactor) are thermally isolated. Then heat dissipation is performed separately, which makes the structure of the traditional inverter not compact, resulting in the problems of bulkiness and high cost. But now with the development of radiator technology, the heat dissipation capacity of the latest radiators has been greatly improved, making it possible to centralize the heat dissipation of the power modules and reactors of the inverter.

From the above, how to provide an inverter that centrally dissipates heat from the power modules and reactors to realize the miniaturization, weight reduction and economicalization of the inverter has become a technical problem urgently to be solved by those skilled in the art.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages and provide a compact inverter with compact structure, strong electromagnetic compatibility and low cost.

The purpose of the utility model is achieved through the following technical solutions: a compact inverter, the compact inverter includes a cabinet, the cabinet includes a rear door panel, the lower part of the cabinet is provided with an air inlet and the upper part is provided with an outlet The inside of the cabinet is divided into DC cabinets and AC cabinets arranged in sequence by a vertical sealing plate. The DC cabinet is divided into the front confluence control part and the rear centralized heat dissipation part by a vertical partition. The confluence control part includes the upper part The control circuit installation area and the lower DC confluence area, the concentrated heat dissipation part is divided into the upper fan compartment, the middle power module area and the lower reactor area by the upper horizontal partition and the lower horizontal partition. The fan compartment is equipped with at least A fan, the power module area includes an air duct cavity and a power module, the power module is arranged in the air duct cavity, and a radiator is arranged in the power module.

The further improvement of the utility model is that: the lower part of the vertical sealing plate between the DC cabinet and the AC cabinet is provided with ventilation holes.

The further improvement of the utility model is that: the AC cabinet includes an upper reserved area and a lower equipment area.

The further improvement of the utility model lies in that: an AC circuit breaker and a contactor are arranged in the equipment area, and the two are arranged along the depth direction of the cabinet body.

The further improvement of the utility model is that: at least one reactor is arranged in the reactor area.

The further improvement of the utility model is that: the air inlet is arranged on the upper part of the rear door panel and the air outlet screen hole is arranged on the lower part of the rear door panel.

Compared with the prior art, the utility model has the following advantages:

The main heating components in the device of the utility model share one air duct for concentrated heat dissipation, which improves the heat dissipation efficiency, makes the structure more compact, and lowers the heat dissipation cost; Each functional area is effectively separated, which avoids electromagnetic interference well and has high electromagnetic compatibility; the lower part of the vertical sealing plate between the DC cabinet and the AC cabinet is provided with ventilation holes, and some electrical components of the AC cabinet can pass through Ventilation holes are used for forced air cooling; the equipment area is equipped with AC circuit breakers and contactors, which are arranged along the depth of the cabinet to reduce the use of connecting copper bars and reduce costs.

Description of drawings:

Fig. 1 is the front view of the compact inverter provided by the embodiment of the present invention;

Fig. 2 is a left view of the DC cabinet in the compact inverter provided by the embodiment of the utility model;

Fig. 3 is the rear view of the compact inverter provided by the embodiment of the utility model;

Fig. 4 is a schematic structural diagram of the rear door panel of the compact inverter provided by the embodiment of the present invention.

Detailed ways:

In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with examples and accompanying drawings. This embodiment is only used to explain the utility model and does not constitute a limitation to the protection scope of the utility model.

Figures 1 to 4 show an embodiment of a compact inverter of the present invention, the compact inverter includes a cabinet, the cabinet includes a rear door panel 15, and the lower part of the cabinet is provided with an inlet The air outlet 20 and the upper part is provided with an air outlet screen hole 23. The inside of the cabinet is divided into a DC cabinet 1 and an AC cabinet 2 arranged in sequence by a vertical sealing plate 11. The DC cabinet 1 is separated by a vertical partition 9 for the front confluence control part and the rear centralized heat dissipation part, the confluence control part includes the upper control circuit installation area 8 and the lower DC confluence area 7, and the centralized heat dissipation part is separated by the upper horizontal partition 16 and the lower horizontal partition 14 into the upper fan compartment 18, The power module area 19 in the middle and the reactor area 21 in the lower part. At least one fan 17 is arranged in the fan compartment 18. The power module area 19 includes an air duct cavity 25 and a power module 20. The power module 20 is arranged in the air duct cavity. In the body 25, the power module 20 is provided with a radiator 10, the lower part of the vertical sealing plate 11 between the DC cabinet 1 and the AC cabinet 2 is provided with a ventilation hole 13, and the AC cabinet 2 includes the upper reserved area 3 and the lower part of the equipment Area 4, the equipment area 4 is provided with an AC circuit breaker 5 and a contactor 22, and both are arranged along the depth direction of the cabinet, at least one reactor 12 is provided in the reactor area 21, and the air inlet 20 is arranged on the upper part of the rear door panel 15 And the air outlet screen hole 23 is arranged at the bottom of the rear door panel 15 .

The DC cabinet 1 adopts forced air cooling for heat dissipation, and the heat dissipation process is as follows:

External cold air enters the DC cabinet 1 from the air inlet 24 at the lower part of the rear door panel 15, passes through the reactor 12 and takes away its heat, then enters the power module 20 through the air inlet on the lower horizontal partition 14, and then passes through the radiator in the power module 10 and take away the heat conducted by the IGBT to the radiator 10, then drawn into the fan compartment 18 by the fan 17, and finally discharged from the air outlet screen hole 23 on the top of the rear door panel 15 and take the heat out of the DC cabinet 1.

The AC cabinet 2 includes an upper reserved area 3 and a lower equipment area 4. The equipment area 4 is equipped with an AC circuit breaker 5 and a contactor 22, which are arranged along the depth direction of the cabinet to reduce the use of connecting copper bars and reduce costs. .

The thermal power of most electrical components in the AC cabinet 2 is small, and natural heat dissipation is mainly adopted. Some electrical components are forced air-cooled through the ventilation holes 13 at the bottom of the vertical sealing plate 11 between the DC cabinet 1 and the AC cabinet 2 .

In the compact inverter provided in this embodiment, each functional area in the cabinet is effectively separated by the vertical sealing plate 11, the upper horizontal partition 16 and the lower horizontal partition 14, so that electromagnetic interference is well avoided. Has high electromagnetic compatibility.

The main heat-generating components in the compact inverter share one air duct for centralized heat dissipation, which improves heat dissipation efficiency, makes the structure more compact, and lowers heat dissipation costs.

The above is only to illustrate the implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, any modification, equivalent replacement, Improvements and the like should all be included within the protection scope of the present utility model.

Claims (6)

1. A compact inverter, characterized in that: the compact inverter includes a cabinet body, the cabinet body includes a rear door panel (15), the lower part of the cabinet body is provided with an air inlet (20) and The upper part is provided with air outlet screen holes (23), and the inside of the cabinet body is divided into DC cabinets (1) and AC cabinets (2) arranged in sequence by a vertical sealing plate (11). The DC cabinet (1) consists of A vertical partition (9) is divided into a confluence control part in the front and a concentrated heat dissipation part in the rear. The confluence control part includes an upper control circuit installation area (8) and a lower DC confluence area (7). The centralized heat dissipation Partially separated by the upper horizontal partition (16) and the lower horizontal partition (14) into the upper fan compartment (18), the middle power module area (19) and the lower reactor area (21), the fan compartment ( 18) is provided with at least one fan (17), the power module area (19) includes an air duct cavity (25) and a power module (20), and the power module (20) is arranged in the air duct cavity In (25), the power module (20) is provided with a radiator (10). 2. A compact inverter according to claim 1, characterized in that: the lower part of the vertical sealing plate (11) between the DC cabinet (1) and the AC cabinet (2) is provided with ventilation hole (13). 3. A compact inverter according to claim 1, characterized in that: the AC cabinet (2) includes an upper reserved area (3) and a lower equipment area (4). 4. A compact inverter according to claim 3, characterized in that: the equipment area (4) is provided with an AC circuit breaker (5) and a contactor (22), and the two are arranged along the Depth direction layout. 5. The compact inverter according to claim 1, characterized in that: at least one reactor (12) is arranged in the reactor area (21). 6. A compact inverter according to claim 1, characterized in that: the air inlet (20) is arranged on the upper part of the rear door panel (15) and the air outlet screen hole (23) is arranged on the rear door panel (15) LOWER.