CN218125216U

CN218125216U - Heat radiation structure and centralized contravariant all-in-one of outdoor equipment

Info

Publication number: CN218125216U
Application number: CN202221853429.1U
Authority: CN
Inventors: 胡雷雷; 张融森; 周俊杰; 包鑫; 赵渊; 孔娜
Original assignee: TBEA Xinjiang Sunoasis Co Ltd; TBEA Xian Electric Technology Co Ltd
Current assignee: TBEA Xinjiang Sunoasis Co Ltd; TBEA Xian Electric Technology Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-12-23
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses an outdoor equipment's heat radiation structure and centralized contravariant all-in-one is connected the copper bar between dc-to-ac converter and the transformer, is connected cavity and the inside cavity UNICOM of dc-to-ac converter AC side, and inside the dc-to-ac converter was discharged to the produced heat of copper bar, make full use of passed through the inside heat exchanger of dc-to-ac converter with waste heat row to external environment. The heat dissipation problem of connecting the copper bar and connecting the cavity between inverter and the transformer has not only been solved, but also the cross-sectional dimension of copper bar can be reduced simultaneously. The temperature of the connecting copper bar and the connecting cavity between the inverter and the transformer is reduced, and the service life of internal devices is prolonged.

Description

Heat radiation structure and centralized contravariant all-in-one of outdoor equipment

Technical Field

The utility model belongs to the technical field of power transmission and transformation equipment, concretely relates to heat radiation structure and centralized contravariant all-in-one of outdoor equipment.

Background

With the development of 1500V outdoor inverters, the power level of a single centralized inverter is basically reached to the top, and the capacity requirement of a large-array photovoltaic power station cannot be met, so most manufacturers start to change the design concept in the design of an inverse centralized inverter, the design idea of a series inverter is used for reference, a modular parallel mode is adopted, the single high-power centralized inverter is subjected to modular design, and a plurality of inverters are connected in parallel to realize higher power level. The modular design of the inverter single machine can meet the requirement of a large square-array photovoltaic power station on a high-power centralized inverter by adopting a plurality of parallel connection modes.

At present, the domestic market mainly adopts a high-power centralized inversion all-in-one machine (the inverter and the transformer are placed together when leaving a factory) product, and the centralized all-in-one machine comprises one or more centralized inverter units and one matched transformer. In order to save the construction cost and the material cost of a power station, an owner requires that an inverter and a transformer are placed on a base and connected by a copper bar. The inverter and the transformer are connected by adopting the copper bars, so that project construction and material cost are saved, but new problems are brought, namely, no heat dissipation is caused when the three-phase copper bars are placed in a closed space, the temperature of the copper bars and the cavity can be continuously increased, the transformer, the cables and the like which are arranged in the inverter can aggravate the aging of insulating materials when working in a high-temperature environment for a long time, and the risk of firing can occur for a long time. Therefore, how to dissipate waste heat in the connecting copper bar and the cavity of the inverter and the transformer is a new problem. At present, the heat dissipation of the connecting copper bar and the connecting cavity of the outdoor high-power inverter all-in-one machine mainly has the following forms.

(1) The size of the inverter and transformer connecting copper bar is increased, and the resistance of the copper bar is reduced, so that the heating value is reduced;

(2) A fan is added outside a cavity for connecting the inverter and the transformer, and forced air cooling is adopted for heat dissipation;

(3) An elbow is added at the upper part of the connecting cavity of the inverter and the transformer, so that the connecting cavity is communicated with the external environment, and natural convection heat dissipation is carried out on the cavity by utilizing the chimney effect;

(4) And a small radiator is added on the connecting copper bar of the inverter and the transformer to radiate heat on the copper bar.

The above and other heat dissipation methods have the following problems.

(1) Although the heating problem of the copper bar can be solved by increasing the size of the copper bar so as to reduce the temperature inside the connecting cavity, the cost of the copper bar is higher, so that the cost of the whole machine is increased;

(2) The lower part of the inverter and transformer connecting cavity is added with a heat radiation fan or the upper part is added with an elbow for convection heat radiation, so that the connecting cavity is communicated with the outside, and the protection grade in the whole connecting cavity cannot meet the requirement;

(3) Although the heat of the copper bar can be reduced by adding the small radiator on the connecting copper bar, the heat generated by the copper bar still can be gathered in the connecting cavity and cannot be dissipated, and the temperature of the whole connecting cavity can be continuously increased.

Disclosure of Invention

The utility model provides a heat radiation structure and centralized contravariant all-in-one of outdoor equipment is under the prerequisite that does not increase the copper bar cost, and is connected copper bar and the inside heat dissipation that dispels of cavity to dc-to-ac converter and transformer department.

In order to achieve the purpose, the utility model relates to a heat dissipation structure of outdoor equipment, which comprises a heat dissipation fan and a connecting cavity, wherein the connecting cavity is used for accommodating a connecting copper bar, one end of the connecting cavity is communicated with an inverter, and the inverter is provided with a heat exchanger; the cooling fan is arranged in the inverter and on one side connected with the connecting cavity, and an air return hole is formed in the lower portion of the cooling fan.

Furthermore, a partition plate is arranged in the connecting cavity, the length of the partition plate is smaller than that of the connecting cavity, an upper cavity is arranged above the partition plate, a lower cavity is arranged below the partition plate, the upper cavity and the horizontal axis of the heat dissipation fan are on the same plane, and the lower cavity and the horizontal axis of the air return hole are on the same plane.

Further, the height of the upper cavity is larger than that of the lower cavity.

Furthermore, the connecting copper bar is positioned in the upper cavity.

Further, the main part of connecting the cavity is both ends open-ended casing, including four curb plates that end to end links in proper order, is provided with the round connecting plate outside the main part both ends, offers threaded hole on the connecting plate.

A centralized inversion all-in-one machine comprises one or more inverters connected in parallel, a transformer and a connecting copper bar; the inverter is provided with a heat exchanger; a connecting cavity is arranged outside the connecting copper bar, one end of the connecting copper bar is connected with the three-phase alternating current output copper bar of the inverter, and the other end of the connecting copper bar is connected with the three-phase input copper bar of the transformer; the first end of the connecting cavity is communicated with the inverter, and the second end of the connecting cavity is connected with the transformer; the inner wall that dc-to-ac converter and connection cavity are connected is provided with radiator fan, and radiator fan below is provided with the return air hole.

Furthermore, two cooling fans are arranged on two sides of the three-phase alternating current output copper bar of the inverter respectively.

Furthermore, the air return hole is a rectangular hole.

Furthermore, the first end of the connecting cavity is fixedly connected with the inverter butt flange, and the second end of the connecting cavity is fixedly connected with the transformer butt flange.

Compared with the prior art, the utility model discloses following profitable technological effect has at least:

the utility model discloses a connect cavity, radiator fan and return air hole, inside the dc-to-ac converter was discharged to the produced heat of copper bar, radiator fan and return air hole got into heat exchanger, arrange waste heat to the outside through heat exchanger, solved and connected the copper bar and connected the heat dissipation problem of cavity between dc-to-ac converter and the transformer, connect the copper bar and connect the reduction of cavity temperature, improved the life of inside device, simultaneously can make to connect the copper bar quantity still less, make the complete machine cost further reduce.

Furthermore, a partition plate is arranged in the connecting cavity, so that air flow circulates according to an optimal heat dissipation path, and the heat dissipation effect is improved.

Furthermore, two cooling fans are arranged at the lower part of the inverter, so that air flow in the connecting cavity is effectively pumped into the inverter and enters the heat exchanger to be cooled.

The utility model discloses in the centralized contravariant all-in-one of high-power, with be connected the copper bar between dc-to-ac converter and the transformer, be connected cavity and the inside cavity intercommunication of dc-to-ac converter alternating current side, inside the dc-to-ac converter was discharged to the produced heat of copper bar, inside the inside heat exchanger of make full use of dc-to-ac converter was with waste heat emission to external environment. The heat dissipation problem of connecting the copper bar and connecting the cavity between inverter and the transformer has not only been solved, but also the cross-sectional dimension of copper bar can be reduced simultaneously. The temperature of the connecting copper bar and the connecting cavity between the inverter and the transformer is reduced, and the service life of internal devices is prolonged. In the whole high-power centralized inversion all-in-one machine, a connecting cavity between the inverter and the transformer has no direct airflow exchange with the outside, and the protection performance is higher.

Drawings

FIG. 1 is an overall layout of the present invention;

FIG. 2a is a schematic view of the connection side of the inverter and the connection cavity according to the present invention;

fig. 2b is a schematic view of the internal heat dissipation of the inverter of the present invention;

fig. 3 is a schematic view of a three-phase input terminal and a connecting flange of the transformer of the present invention;

FIG. 4 is a diagram of the connecting copper bar and connecting cavity of the inverter and transformer of the present invention;

fig. 5 is the utility model discloses the copper bar is connected with the transformer to dc-to-ac converter and cavity heat dissipation map.

In the drawings: 1. the transformer comprises a transformer body, 2, an inverter body, 3, a connecting cavity, 4, a connecting copper bar, 5, a heat exchanger, 6, a cooling fan, 7, an inverter three-phase alternating current output copper bar, 8, a transformer three-phase input copper bar, 9, an inverter butt flange, 10, a transformer butt flange, 11, a return air hole, 31, an upper cavity body, 32, a lower cavity body, 33, a partition plate, 34, a side plate, 35 and a connecting plate.

Detailed Description

In order to make the purpose and technical scheme of the utility model clearer and more convenient to understand. The present invention will be described in further detail with reference to the following drawings and examples, wherein the specific examples are provided for the purpose of illustration only and are not intended to be limiting.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to overcome and to be connected the copper bar and be connected the heat dissipation problem of cavity between dc-to-ac converter and the transformer in the centralized contravariant all-in-one of current high-power, the utility model provides a simple structure, design benefit, dependable performance, protectiveness are good, the heat dissipation scheme that the radiating efficiency is high.

Contravariant all-in-one layout is concentrated to high-power, the utility model provides a simple structure, design benefit, dependable performance, protection nature are good, the heat radiation structure that the radiating efficiency is high.

Example 1

Referring to fig. 1, the utility model discloses a high-power centralized contravariant all-in-one mainly comprises one or many parallelly connected dc-to-ac converter 2, the transformer 1 that matches, the connection copper bar 4 between dc-to-ac converter 2 and the transformer 1 to and the closed connection cavity 3 of protection connection copper bar. 4 one ends of connecting copper bar between dc-to-ac converter 2 and the transformer 2 are connected with inverter three-phase AC output copper bar 7, the other end is connected with transformer three-phase input copper bar 8, connect cavity 3 setting between dc-to-ac converter 2 and transformer 1, first end and transformer 1 intercommunication, the second end and dc-to-ac converter 2 intercommunication, first end and inverter butt flange 9 adopt screw fixed connection, the second end adopts screw fixed connection with transformer butt flange 10, connecting copper bar 4 between dc-to-ac converter 2 and the transformer 1 sets up inside connecting cavity 3.

Referring to fig. 2a, an inverter three-phase alternating current output copper bar 7 and an inverter butt flange 9 in butt joint with the connecting cavity 3 are arranged on the alternating current side of the inverter, a heat dissipation fan 6 is respectively installed on two sides of the inverter three-phase alternating current output copper bar 7 on the inner side of the inverter butt flange 9, and the heat dissipation fans 6 achieve heat dissipation inside the connecting copper bar 4 and the connecting cavity 3; two air return holes 11 are formed in the lower parts of the heat dissipation fan 6 and the three-phase alternating current output copper bar 7; the inverter butt flange 9 is connected with the connecting cavity 3 by screws.

Referring to fig. 2b, the internal cavity of the high-power outdoor inverter dissipates heat of internal devices by means of an external heat exchanger, airflow circulates inside the inverter 2 under the action of an internal circulation fan of the heat exchanger 5 to transfer heat to the heat exchanger 5, and the heat is discharged outside the inverter by external circulation of the heat exchanger 5, so that heat dissipation is realized.

Fig. 3 is the utility model discloses transformer three-phase input copper bar 8 and transformer flange 10 sketch map, transformer three-phase input copper bar 8 with be connected copper bar 4 second end and be connected, transformer flange 10 with be connected cavity 3 and adopt the screw connection.

Fig. 4 is a schematic view of a connecting copper bar 4 and a connecting cavity 3 between the inverter and the transformer of the present invention, the connecting copper bar 4 between the inverter 2 and the transformer 1 is disposed inside the connecting cavity 3, one end of the connecting copper bar is connected to a three-phase ac output copper bar 7 of the inverter, and the other end of the connecting copper bar is connected to a three-phase input copper bar 8 of the transformer; one end of the connecting cavity 3 is connected with an inverter butt flange 9, and the other end is connected with a transformer butt flange 10. The main body part of connecting cavity 3 is both ends open-ended casing, including four curb plates 34 that end to end links in proper order, and the main body both ends outside is provided with round connecting plate 35, set up threaded hole on the connecting plate for adopt the screw to be connected with dc-to-ac converter flange 9 or transformer flange 10. A partition plate 33 is arranged in the connecting cavity 3, an upper cavity 31 is arranged above the partition plate 33, a lower cavity 32 is arranged below the partition plate 33, and the height of the upper cavity 31 is larger than that of the lower cavity 32. The connecting copper bar 4 is positioned in the upper cavity 31, the upper cavity 31 is communicated with the AC side of the inverter after being aligned with the fan at the inner side of the inverter flange and the three-phase AC output copper bar 7 of the inverter, and the lower cavity 32 is communicated with the AC side of the inverter after being aligned with the return air hole 11 at the lower part of the three-phase AC output copper bar 7 of the inverter; the length of the partition plate 33 is smaller than that of the connecting cavity 3, so that an airflow flows out of the flowing channel, and when the heat dissipation fan 6 operates, the air inside the cavity of the connecting copper bar 4 can flow, and therefore the purpose of heat dissipation is achieved.

Fig. 5 the utility model discloses the inverter is connected copper bar 4 and cavity heat dissipation map with the transformer, and high-power outdoor inverter internal cavity adopts the external heating exchange mode to dispel the heat to interior device, and under the effect of the circulating fan in heat exchanger 5, the air current circulates in the inverter, transmits the heat to heat exchanger 5, and heat exchanger 5 external circulation discharges the heat outside the inverter; the alternating current end of the inverter is provided with a three-phase alternating current output copper bar and an inverter butt flange 9, the upper part of the inner side of the inverter butt flange 9 is provided with a heat dissipation fan 6, the lower part of the inner side of the inverter butt flange 9 is provided with a return air hole 11, a partition plate 33 is arranged in the connecting cavity 3, the connecting cavity 3 is divided into an upper part and a lower part, the connecting copper bar 4 is positioned in an upper cavity 31, the upper cavity 31 is communicated with the alternating current side of the inverter after being aligned with the fan and the three-phase alternating current output copper bar in the inverter flange, and the lower cavity 32 is communicated with the alternating current side of the inverter after being aligned with the return air hole 11 in the lower part of the fan and the three-phase alternating current output copper bar 7 of the inverter; a hole is formed in one side, close to the transformer, of the middle partition plate 33 of the connecting cavity 3, when a fan on the inner side of the inverter flange runs, air inside the connecting cavity 3 can flow, and therefore the purpose of heat dissipation of the connecting copper bar 4 and the connecting cavity 3 is achieved.

Example 2

A heat radiation structure for an inversion all-in-one machine comprises a heat exchanger 5, a heat radiation fan 6 and a connecting cavity 3, wherein the inversion all-in-one machine comprises one or more centralized inverters 2 and a matched transformer 1, and the transformer 1 is connected with the inverters through connecting copper bars 4; the first end of the connecting cavity 3 is connected with the inverter 2, and the second end is connected with the transformer 1.

The main part of connecting cavity 3 is both ends open-ended casing, including four curb plates that end to end links in proper order, and the main part both ends outside is provided with the round connecting plate, set up threaded hole on the connecting plate for be connected with dc-to-ac converter or transformer. Two heat dissipation fans 6 are arranged at the lower part of the inverter 2, and two rectangular air return holes 11 are arranged below the heat dissipation fans 6. A partition 33 is arranged in the connecting cavity 3, an upper cavity 31 is arranged above the partition 33, and a lower cavity 32 is arranged below the partition 33. The connecting copper bar 4 is positioned in the upper cavity 31, the upper cavity 31 is communicated with the alternating current side of the inverter after being aligned with a heat radiation fan in the inverter and the three-phase alternating current output copper bar 7 of the inverter, and the lower cavity 32 is communicated with the alternating current side of the inverter after being aligned with the air return hole 11 at the lower part of the three-phase alternating current output copper bar 7 of the inverter; the length of the partition 33 is smaller than that of the connecting cavity 3, and is a flow passage for the air flow to flow out, when the heat dissipation fan 6 operates, the air flow of the inverter enters the lower cavity 32 from the air return hole 11, flows to the side of the connecting cavity 3 close to the transformer, flows to the upper cavity 31 through the passage between the partition and the side wall of the transformer, flows to the heat exchanger from the upper cavity 31 under the action of the heat dissipation fan, and dissipates heat through the heat exchanger.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims

1. The heat dissipation structure of the outdoor equipment is characterized by comprising a heat dissipation fan (6) and a connecting cavity (3), wherein the connecting cavity (3) is used for accommodating a connecting copper bar (4), one end of the connecting cavity (3) is communicated with an inverter (2), and a heat exchanger (5) is installed on the inverter (2); the heat dissipation fan (6) is arranged in the inverter (2) and on one side connected with the connecting cavity (3), and an air return hole (11) is formed below the heat dissipation fan (6).

2. The heat dissipation structure of outdoor equipment according to claim 1, wherein a partition (33) is disposed in the connection cavity (3), the length of the partition (33) is smaller than that of the connection cavity (3), an upper cavity (31) is disposed above the partition (33), a lower cavity (32) is disposed below the partition (33), the upper cavity (31) and the horizontal axis of the heat dissipation fan (6) are on the same plane, and the lower cavity (32) and the horizontal axis of the return air hole (11) are on the same plane.

3. A heat dissipating structure of an outdoor unit according to claim 2, characterized in that the height of the upper cavity (31) is greater than the height of the lower cavity (32).

4. The heat dissipation structure of an outdoor device according to claim 1 or 3, wherein the connecting copper bar (4) is located in the upper cavity (31).

5. The heat dissipation structure of outdoor equipment according to claim 1, wherein the main body of the connection cavity (3) is a shell with two open ends, and comprises four side plates (34) connected end to end in sequence, a circle of connection plate (35) is arranged outside the two ends of the main body, and the connection plate is provided with a threaded hole.

6. A centralized inversion all-in-one machine is characterized by comprising one or more inverters (2) connected in parallel, a transformer (1) and a connecting copper bar (4); a heat exchanger (5) is arranged on the inverter (2); a connecting cavity (3) is arranged outside the connecting copper bar (4), one end of the connecting copper bar (4) is connected with the inverter three-phase alternating current output copper bar (7), and the other end of the connecting copper bar is connected with the transformer three-phase input copper bar (8); the first end of the connecting cavity (3) is communicated with the inverter (2), and the second end of the connecting cavity is connected with the transformer (1); the inner wall that inverter (2) and connection cavity (3) are connected is provided with radiator fan (6), radiator fan (6) below is provided with return air hole (11).

7. The integrated centralized inversion all-in-one machine as claimed in claim 6, wherein two cooling fans (6) are respectively arranged on two sides of the inverter three-phase alternating current output copper bar (7).

8. A centralized inversion all-in-one machine according to claim 6, wherein the return air hole (11) is a rectangular hole.

9. The integrated centralized inversion integrated machine according to claim 6, wherein a first end of the connection cavity (3) is fixedly connected with the inverter butt flange (9), and a second end is fixedly connected with the transformer butt flange (10).