CN209029927U - Power cabinet, photovoltaic parallel in system and container - Google Patents

Abstract

In the power cabinet, photovoltaic grid-connected system and container provided by the utility model, the power cabinet adopts three mutually independent cavities to respectively set up three kinds of equipment: heat dissipation element, magnetic element and high protection grade element; at the same time, in the three cavities Corresponding heat dissipation devices are also provided, and each heat dissipation device meets the heat dissipation requirements of the corresponding equipment in the cavity, so that the heat dissipation schemes of the three devices are respectively targeted and will not affect each other, even if they operate in a dusty environment for a long time. The magnetic elements in the same cavity will not be affected by dust due to the need to meet the heat dissipation requirements of the heat dissipation element, and the reliability is improved compared with the prior art.

Description

Power cabinets, photovoltaic grid-connected systems and containers

technical field

The utility model relates to the technical field of inverters, in particular to a power cabinet, a photovoltaic grid-connected system and a container.

Background technique

The photovoltaic grid-connected inverter is an interface device between the solar power generation system and the power grid, and its reliability determines whether the photovoltaic power generation system can operate safely. In order to ensure the reliability of the inverter, in addition to ensuring that the circuit design and implementation meet the requirements, but also because of the heat dissipation performance of the inverter power cabinet and the high protection under various harsh weather conditions, the work of the entire inverter system is affected. Stability, product reliability, and service life of power devices all have an important impact. Therefore, it is also necessary to ensure that the power cabinet has high heat dissipation performance and protection performance.

In the design of the cabinet structure layout of the inverter power cabinet, its cavity layout and heat dissipation air duct directly affect the protection performance and heat dissipation performance of the product. In the prior art, in the inverter power cabinet, two divided cavities are generally set according to the protection level required by the components, and one cavity with a low protection level, such as a direct ventilation cavity, is provided with a cooling body and a magnetic component as required. The components that dissipate heat, and the heat generated during the operation of the equipment is removed from the cavity through the forced air cooling of the fan; due to the high heat dissipation efficiency of the direct ventilation, for the components with relatively large heat, the equipment can be quickly removed during operation. The heat generated exits the cavity.

However, in the above-mentioned prior art solution, due to the direct ventilation and heat dissipation through the fan, if the inverter operates in a dusty environment for a long time, a large amount of sand or conductive dust will enter the cavity, thereby entering the cavity. the surface or inside of magnetic components, thereby reducing product reliability.

Utility model content

The utility model provides a power cabinet, a photovoltaic grid-connected system and a container, so as to solve the problem in the prior art that the dusty environment will affect the magnetic element and cause low reliability.

To achieve the above purpose, the technical solutions provided by the application are as follows:

One aspect of the present utility model provides a power cabinet, comprising three mutually independent cavities: a first cavity, a second cavity and a third cavity; wherein:

The first cavity is provided with a heat dissipation element and a first heat dissipation device; the first heat dissipation device meets the heat dissipation requirements of the heat dissipation element;

The second cavity is provided with a magnetic element and a second heat dissipation device; the second heat dissipation device meets the heat dissipation requirements of the magnetic element;

The third cavity is provided with a high protection level element and a third heat dissipation device; the third heat dissipation device meets the heat dissipation requirements of the high protection level element.

Preferably, the third cavity is arranged on one side of the power cabinet;

the first cavity and the second cavity are arranged on the other side of the power cabinet;

The first cavity and the second cavity are distributed up and down, and are respectively closely connected with the third cavity.

Preferably, the first heat dissipation device includes: a first air inlet, a first air outlet and a first fan;

The first air inlet and the first air outlet are both arranged on the surface of the first cavity;

The first fan is arranged inside the first cavity.

Preferably, the first air inlet is arranged below the side surface of the first cavity;

The first air outlet is arranged above or on the top of the side surface of the first cavity;

The first fan is arranged below the heat dissipation element.

Preferably, the first air inlet is arranged above or at the top of the side surface of the first cavity;

the first air outlet is arranged below the side surface of the first cavity;

The first fan is arranged above the heat dissipation element.

Preferably, the first air inlet, the first air outlet and the first fan all meet the requirements of IP65 protection level.

Preferably, the second heat dissipation device includes: a second air inlet and a second fan;

the second air inlet is arranged on the surface of the second cavity;

The second fan is arranged inside the second cavity.

Preferably, the second air inlet is arranged under the side surface or the bottom of the second cavity;

The second fan is arranged at the opening above the side surface of the second cavity.

Preferably, the second air inlet is arranged above the side surface of the second cavity;

The second fan is arranged under the side surface of the second cavity or at the bottom opening.

Preferably, both the second air inlet and the second fan meet IP65 protection level requirements.

Preferably, the magnetic element is a magnetic element that meets the requirements of IP65 protection grade through a potting process.

Preferably, the second heat dissipation device includes: a first heat exchanger connected to the second cavity.

Preferably, the third heat dissipation device includes: a second heat exchanger connected to the third cavity.

Preferably, an internal circulating fan and at least one partition plate are further arranged in the third cavity, so that a circulating air duct is formed inside the third cavity.

Preferably, the high protection grade components include: a power switch tube, a capacitor and a circuit board.

Preferably, the magnetic element includes: a reactor, a choke coil and a transformer.

Another utility model of the present invention provides a photovoltaic grid-connected system, which includes an inverter power cabinet, and the inverter power cabinet is any of the power cabinets described above.

Another utility model of the present invention also provides a container, which includes any of the above-mentioned power cabinets.

The power cabinet provided by the utility model adopts three mutually independent cavities to respectively set up three kinds of equipment, namely, a heat dissipation element, a magnetic element and a high protection grade element; Each heat dissipation device meets the heat dissipation requirements of the corresponding equipment in the cavity, so that the heat dissipation schemes of the three devices are targeted and will not affect each other. Even if they operate in a dusty environment for a long time, they will not meet the heat dissipation requirements of the heat dissipation components , and the magnetic components in the same cavity are affected by dust, which improves the reliability compared with the prior art.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a power cabinet provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another power cabinet provided by another embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

In order to solve the problem in the prior art that the dusty environment will affect the magnetic components and lead to low reliability, the utility model provides a power cabinet, which can be any power conversion equipment and its cabinet settings, such as inverters power cabinet.

Specifically, the power cabinet includes three mutually independent cavities, as shown in FIG. 1 and FIG. 2 : a first cavity 100 , a second cavity 200 and a third cavity 300 ; wherein:

The first cavity 100 is provided with a heat dissipation element 101 and a first heat dissipation device. The first heat dissipation device meets the heat dissipation requirements of the heat dissipation element 101 ; taking the inverter power cabinet as an example, the heat dissipation element 101 mainly refers to the cooling body of the power switch tube (eg, IGBT). In practical applications, fans and corresponding air inlets and outlets may be used to achieve heat dissipation through direct heat exchange with outside air; that is, the first heat dissipation device may include: a first air inlet 102, a first air outlet 103, and a first air outlet 103. A fan 104 ; wherein, the first air inlet 102 and the first air outlet 103 are disposed on the surface of the first cavity 100 , and the first fan 104 is disposed inside the first cavity 100 .

As shown in FIG. 1 and FIG. 2 , the first air inlet 102 is arranged below the side surface of the first cavity 100 ; the first air outlet 103 is arranged above the side surface of the first cavity 100 ; the first fan 104 is arranged on the heat dissipation element 101 below.

The side surface of the first cavity 100 refers to any one of the other side surfaces except the upper surface and the lower surface, preferably a wider front surface, as shown in FIG. 1 and FIG. The air inlet and outlet exchange heat with the air inside the first cavity 100 , and the installation operation is also easy to implement.

In practical applications, the ventilation mode in the first cavity 100 may be side entry and top exit as indicated by the arrowed line segments inside and outside the first cavity 100 in FIGS. 1 and 2 . In practical applications, it can also be designed as side entry and top out way, that is, the first air inlet 102 is arranged under the side surface of the first cavity 100, and the first air outlet 103 is arranged on the top (upper surface) of the first cavity 100, or, it can also be designed to be the same as that of FIG. 1 and FIG. As shown in FIG. 2 , the side-in and bottom-out mode with opposite ventilation directions, that is, the first air inlet 102 is arranged above the side (or the top) of the first cavity 100 , and the first air outlet 103 is arranged below the first cavity 100 . , and the first fan 104 is arranged above the heat dissipation element 101; that is, the solution of the fan is not limited to the specific position setting form of the fan and the air inlet and outlet shown in FIG. 1 and FIG. 2, as long as the heat dissipation requirements of the heat dissipation element 101 are satisfied. , all within the scope of protection of this application. And, shutters can be set at the air inlet and outlet to reduce the entry of dust. In addition, other heat-dissipating devices, such as heat-dissipating devices such as heat exchangers, may also be selected to perform heat exchange on the heat-dissipating element 101 depending on the actual application environment.

The second cavity 200 is provided with a magnetic element 201 and a second heat dissipation device. The second heat dissipation device meets the heat dissipation requirements of the magnetic element 201 . The magnetic element 201 mainly refers to a reactor, a choke coil and a transformer, such as a reactor in an inverter circuit structure.

In order to avoid that the same heat dissipation device and heat dissipation environment are used for the heat dissipation element and the magnetic element in the prior art, the magnetic element will be affected by dust. It is arranged in the independent second cavity 200 .

In order to avoid being affected by dust, in practical applications, the second heat dissipation device is preferably a heat exchanger connected to the second cavity 200, that is, the first heat exchanger 202 shown in FIG. 1; Heat exchange is performed to achieve the purpose of conducting heat dissipation from the interior of the cavity to the outside, avoiding the contact between the air medium inside the cavity and the outside air medium, so as to prevent the outside polluted air from entering the interior of the cavity, making the cavity to dust tightness.

In practical applications, the first heat exchanger 202 can be disposed on the side of the second cavity 200; taking a rectangular shape as an example, the side of the second cavity 200 refers to the four sides except the upper surface and the lower surface. Any side, preferably a wider front, as shown in FIG. 1 , so that the first heat exchanger 202 can not only exchange heat with the internal air of the second cavity 200 in a larger area (as shown in FIG. 1 ) The inside and outside of the second cavity 200 are indicated by arrowed line segments), and the installation operation is also easy to implement. In practical applications, it can also be arranged on other surfaces, as long as the heat dissipation requirements of the magnetic element 201 can be met, all within the protection scope of the present application.

In addition, the protection level of the magnetic element 201 itself can be improved to avoid being affected by dust. For example, the magnetic element 201 shown in FIG. 2 can improve the protection level by potting and other processes, for example, to make it meet the IP65 protection level requirements, that is, IP65 sealing is performed on its iron core, and IP65 end sealing is performed on its coil; , the second heat dissipation device equipped for it can be a fan and the corresponding air inlet and outlet, so that the heat of the magnetic element 201 can be directly exchanged with the outside air through the fan and the air inlet and outlet, and then discharged from the cavity, which can improve the heat dissipation efficiency more than the heat exchanger. , can obtain better heat exchange effect.

Specifically, the second heat dissipation device may include a second air inlet 203 and a second fan 204 ; wherein, the second air inlet 203 is disposed on the surface of the second cavity 200 ; the second fan 204 is disposed inside the second cavity 200 .

As shown in FIG. 2 , the second air inlet 203 is arranged under the side surface of the second cavity 200 ; the second fan 204 is arranged at the opening above the side surface of the second cavity 200 .

The side of the second cavity 200 can refer to the above explanation, preferably a wider front, as shown in FIG. 2 , so that the outside air can not only exchange heat with the internal air of the second cavity 200 in a larger area , and it is also easy to implement the installation operation for the second air inlet 203 and the second fan 204 .

In the embodiment shown in FIG. 2 , the air outlet is not provided separately, but the fan is directly set at the opening above the side; in practical applications, the second fan 204 can also be set inside the second cavity 200, and then placed in the second cavity 200. Set an air outlet above the side, such as an air outlet. And the ventilation direction shown in FIG. 2 is side in and top out (as shown by the arrow line inside and outside the second cavity 200 in FIG. 2 ), in practical application, it can also be designed as bottom in and top out, that is, the second air inlet. 203 is arranged at the bottom (lower surface) of the second cavity 200 , or it can also be designed as a side-in and bottom-out manner opposite to the ventilation direction shown in FIG. Above the side; the second fan 204 is arranged at the opening under the side (or bottom) of the second cavity 200; as long as the protection level of the magnetic element 201 is improved and the outside air is used as the heat dissipation medium, it is all in the present application. within the scope of protection. In addition, shutters can be provided at the air inlet and air outlet to reduce the entry of dust.

The third cavity 300 is provided with a high protection level element and a third heat dissipation device; the third heat dissipation device meets the heat dissipation requirements of the high protection level element.

The high protection grade components refer to: in all components of the inverter, except the heat dissipation element 101 and the magnetic element 201, other components that require a high protection level; mainly power switch tubes (such as IGBT), capacitors and circuit boards, etc. Due to the high protection level of these components, the third heat dissipation device equipped for them is preferably a heat exchanger connected to the third cavity 300 , namely the second heat exchanger 301 shown in FIG. 1 and FIG. 2 . ; To exchange heat with the outside air through the heat exchanger (as shown by the line with arrows inside and outside the third cavity 300 in FIG. 1 ), in order to achieve the purpose of conducting heat dissipation from the inside of the cavity to the outside world, it can avoid the air medium inside the cavity The contact with the outside air medium can prevent the outside polluted air from entering the interior of the cavity, so that the cavity can be dust-tight.

In practical applications, the second heat exchanger 301 can be disposed on the side of the third cavity 300; taking a rectangular shape as an example, the side of the third cavity 300 refers to the other four sides except the upper surface and the lower surface. Any side, preferably a wider front, as shown in FIG. 1 and FIG. 2 , so that the second heat exchanger 301 can not only exchange heat with the internal air of the third cavity 300 in a larger area, but also It is also easy to carry out installation operations.

In practical applications, the second heat exchanger 301 may also be disposed on other surfaces of the third cavity 300 , as long as the heat dissipation requirements of the high-protection-level components can be met, which are all within the scope of protection of the present application.

Further, since the third cavity 300 has a larger space size and a more complex structure, according to the specific structural layout of the internal components, an internal circulating fan and at least one partition relay can be added to form a circulating air duct.

The power cabinet provided in this embodiment adopts three mutually independent cavities to respectively set up three kinds of equipment, namely the heat dissipation element 101 , the magnetic element 201 and the high protection level element; at the same time, corresponding heat dissipation elements are also respectively set in the three cavities Each heat dissipation device meets the heat dissipation requirements of the corresponding equipment in the cavity, so that the heat dissipation schemes of the three devices are targeted and will not affect each other. Even if they operate in a dusty environment for a long time, they will not meet the needs of heat dissipation components 101, and the magnetic element 201 in the same cavity is affected by dust. Using the power cabinet provided in this embodiment as the power cabinet of the inverter improves reliability compared with the prior art.

It is worth noting that each cavity in the prior art is generally arranged in parallel and occupies a large space. Therefore, another embodiment of the present invention also provides another power cabinet. On the basis of the above embodiment, preferably, as shown in FIG. 1 and FIG. 2 :

The third cavity 300 is arranged on one side of the power cabinet;

The first cavity 100 and the second cavity 200 are arranged on the other side of the power cabinet;

The first cavity 100 and the second cavity 200 are distributed up and down, and are in close contact with the third cavity 300 respectively.

As shown in FIG. 1 and FIG. 2 , the first cavity 100 and the second cavity 200 are closely connected to the back of the third cavity 300 through their own backs in a one-on-one distribution state; Each device in the design is arranged on the inside of the back of its respective cavity, and the terminals that need to be connected to other devices in the cavity are extended out of the back of the cavity where it is located, and end face sealing or sealing plate sealing is performed to ensure the three cavities. independent of each other.

In practical applications, the above three cavities can each have their own surfaces, and then the three can be assembled; or, all the equipment in the three cavities can be installed on the same back according to their own positions. On both sides of the power cabinet, and seal the sealing plate between the first cavity 100 and the second cavity 200, and then assemble the other surfaces of each cavity and the corresponding heat sinks on the back, forming the entire power cabinet. chassis.

No matter what method is used to assemble the entire power cabinet in practical applications, the three cavities can be arranged into a compact structure as shown in FIG. 1 and FIG. 2 , thereby maximizing the use of space.

The rest of the structures and principles are the same as the above-mentioned embodiments, and will not be repeated here.

In addition, it should also be noted that, for the protection level setting of the power cabinet, the structural design shown in Figure 1 and Figure 2 is adopted, and the three independent cavities are used for the heat dissipation components, magnetic components and high protection level components. On the basis of heat exchange, the protection level of each heat sink can also be set to make the power cabinet as a whole reach a higher protection level, such as IP65. specific:

In FIGS. 1 and 2 , only the heat dissipation element 101 and the first fan 104 are arranged in the first cavity 100 , the air in and out is side in and out, and the heat dissipation medium is the outside air; because the protection level of the heat dissipation element 101 itself is relatively high , At this time, the fan and air inlet and outlet with high protection level are used, that is, the first air inlet 102, the first air outlet 103 and the first fan 104 are set, all of which meet the requirements of high protection level, such as the requirements of IP65, which can improve the first cavity. The overall protection level of the body 100.

Similarly, setting the second air inlet 203 and the second fan 204 in FIG. 2 to meet the IP65 protection level requirement can also improve the protection level of the second cavity 200 shown in FIG. 2 .

In FIG. 1 , both the second cavity 200 and the third cavity 300 use heat exchangers to exchange heat with the heat-generating components inside the cavities, that is, the components inside the cavities are not in direct contact with the outside polluted air, so that the The magnetic element 201 and the high-protection-class components are dust-tight, thus meeting higher protection classes, such as IP65.

The power cabinet provided in this embodiment can improve the protection level of the entire inverter power cabinet and meet the requirements of various outdoor working conditions.

The rest of the structures and principles are the same as the above-mentioned embodiments, and will not be repeated here.

Another embodiment of the present invention also provides a photovoltaic grid-connected system, wherein the inverter power cabinet is the power cabinet described in any of the above embodiments, and the specific structure and arrangement of the inverter power cabinet refer to the above Embodiments are sufficient, and details are not repeated here.

In practical applications, the photovoltaic grid-connected system should also be equipped with photovoltaic arrays, optimizers, combiner boxes, transformers, grid-connected switches and other equipment, depending on its specific application environment, which is not limited here, and all are included in the application. within the scope of protection.

Another embodiment of the present invention further provides a container, including the power cabinet described in any of the above embodiments. The specific structure and arrangement of the power cabinet may refer to the above embodiments, and will not be repeated here. .

In practical applications, the container should also be provided with other electrical equipment or communication equipment, which is not limited here, and depends on the specific application environment, which are all within the scope of protection of the present application.

The various embodiments of the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can use the methods and technical contents disclosed above to make many possible changes and modifications to the technical solution of the present invention, or be modified to equivalent changes. Equivalent Example. Therefore, without departing from the content of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (18)

1. a kind of power cabinet, which is characterized in that including three mutually independent cavitys: the first cavity, the second cavity and third Cavity；Wherein:

Heat dissipation element and the first radiator are provided in first cavity；First radiator meets the heat dissipation member The cooling requirements of part；

Magnetic element and the second radiator are provided in second cavity；Second radiator meets the magnetic member The cooling requirements of part；

High-protection level element and third radiator are provided in the third cavity；Described in the third radiator meets The cooling requirements of high-protection level element.

2. power cabinet according to claim 1, which is characterized in that the third cavity is set to the one of the power cabinet Side；

First cavity and second cavity are set to the other side of the power cabinet；

First cavity and second cavity are distribution up and down, and respectively with the third cavity close proximity.

3. power cabinet according to claim 2, which is characterized in that first radiator includes: the first air inlet, One air outlet and the first blower；

First air inlet and first air outlet are all set in the surface of first cavity；

First blower is set to the inside of first cavity.

4. power cabinet according to claim 3, which is characterized in that first air inlet is set to first cavity Below side；

First air outlet is set to above the side of first cavity or top；

First blower is set to below the heat dissipation element.

5. power cabinet according to claim 3, which is characterized in that first air inlet is set to first cavity Above side or top；

First air outlet is set to below the side of first cavity；

First blower is set to above the heat dissipation element.

6. according to power cabinet as claimed in claim 3 to 5, which is characterized in that first air inlet, first outlet air Mouth and first blower, are all satisfied IP65 protection level requirements.

7. power cabinet according to claim 2, which is characterized in that second radiator include: the second air inlet and Second blower；

Second air inlet is set to the surface of second cavity；

Second blower is set to the inside of second cavity.

8. power cabinet according to claim 7, which is characterized in that second air inlet is set to second cavity Below side or bottom；

Second blower is set at the side upper opening of second cavity.

9. power cabinet according to claim 7, which is characterized in that second air inlet is set to second cavity Above side；

Second blower is set to below the side of second cavity or at bottom opening.

10. according to any power cabinet of claim 7-9, which is characterized in that second air inlet and second wind Machine is all satisfied IP65 protection level requirements.

11. power cabinet according to claim 1 or 2, which is characterized in that the magnetic element is to be met by dosing technology The magnetic element of IP65 protection level requirements.

12. power cabinet according to claim 1 or 2, which is characterized in that second radiator includes: and described The connected first heat exchanger of two cavitys.

13. power cabinet according to claim 1 or 2, which is characterized in that the third radiator includes: and described The connected second heat exchanger of three cavitys.

14. power cabinet according to claim 13, which is characterized in that be additionally provided with internal circulated air in the third cavity Machine and at least one piece of partition make the third inside cavity form circulation air path.

15. power cabinet according to claim 1, which is characterized in that the high-protection level element includes: power switch Pipe, capacitor and circuit board.

16. power cabinet according to claim 1, which is characterized in that the magnetic element include: reactor, choke coil and Transformer.

17. a kind of photovoltaic parallel in system, which is characterized in that including inverter power cabinet, the inverter power cabinet is such as right It is required that any power cabinet of 1-16.

18. a kind of container, which is characterized in that including any power cabinet of claim 1-16.