CN224124439U

CN224124439U - Power conversion equipment and photovoltaic systems

Info

Publication number: CN224124439U
Application number: CN202520581127.0U
Authority: CN
Inventors: 赵俊志
Original assignee: Beijing Hiconics Eco Energy Drive Technology Co Ltd
Current assignee: Beijing Hiconics Eco Energy Drive Technology Co Ltd
Priority date: 2025-03-31
Filing date: 2025-03-31
Publication date: 2026-04-14
Anticipated expiration: 2035-03-31

Abstract

This application provides a power conversion device and a photovoltaic system. The power conversion device includes: a chassis with a first chamber and a second chamber inside, and a first air vent, a second air vent, and a third air vent on the chassis; a first electronic component assembly disposed within the first chamber; a first fan disposed within the first chamber; a heat exchanger disposed on one side of the chassis, the heat exchanger having a heat exchange channel, a first opening, a second opening, and a first passage, both ends of the heat exchange channel communicating with the first chamber, the first opening communicating with the third air vent and the first passage, and the first passage communicating with the second opening; a radiator disposed within the second chamber; and a second fan disposed within the second chamber. The first fan operates to drive air to flow between the first chamber and the heat exchange channel; the second fan operates to drive air into the second chamber through the first air vent and out of the chassis through the second and third air vents. This application can reduce the temperature within the first chamber, improving the overall performance and service life of the device.

Description

Power conversion device and photovoltaic system

Technical Field

The application relates to the technical field of power conversion equipment, in particular to power conversion equipment and a photovoltaic system.

Background

In the new energy industry, power conversion devices are an indispensable key basic device, and the power conversion devices are used for converting electric energy generated by clean photovoltaic or energy storage batteries into power sources meeting the requirements of a power grid. In the related art, all electronic component groups of the power conversion device are mounted in a closed box body, a radiator is arranged outside the box body, and the radiator radiates heat to the electronic component groups in the box body.

With the improvement of the integration level of the power conversion equipment, the volume power density is higher and higher, the temperature in the closed box body is higher, and the high environment temperature forms a serious challenge for the reliability of the electronic component group in the box body. The electronic component group in the box body is only radiated through the radiator, the radiating effect is poor, the temperature of the box body is higher, and the service life of the electronic component group is seriously influenced.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, a first aspect of the application proposes a power conversion device.

A second aspect of the application proposes a photovoltaic system.

In view of the above, a first aspect of the present application provides a power conversion device, which includes a chassis, a first chamber and a second chamber disposed in the chassis, a first air port, a second air port and a third air port disposed on the chassis and connected to the second chamber, a first electronic component set disposed in the first chamber, a first fan disposed in the first chamber, a heat exchanger disposed at one side of the chassis, the heat exchanger being provided with a heat exchange channel, a first opening, a second opening and a first channel, both ends of the heat exchange channel being connected to the first chamber, the first opening being connected to the third air port and the first channel, the first channel being further connected to the second opening, a heat sink disposed in the second chamber for dissipating heat from the first chamber, a second fan disposed in the second chamber, the first fan being operative to drive air to flow between the first chamber and the heat exchange channel, the second fan being operative to drive air to enter the second chamber via the first air port and flow out of the chassis via the second air port and the third air port.

The application provides power conversion equipment which comprises a chassis, a first electronic component group, a first fan, a heat exchanger, a radiator and a second fan.

The first chamber and the second chamber are arranged in the case, and the first air port, the second air port and the third air port are arranged on the case. The first electronic component group and the first fan are arranged in the first cavity, and the radiator and the second fan are arranged in the second cavity. The first chamber has a function of accommodating and fixing the first electronic component and the first fan, and the second chamber has a function of accommodating and fixing the heat sink and the second fan.

The heat exchanger is arranged on one side of the chassis, i.e. the heat exchanger is arranged independent of the chassis and is arranged on the outer side of the chassis. The heat exchanger is provided with a heat exchange channel. Both ends of the heat exchange channel are communicated with the first cavity. Like this, the work of first fan can drive the air and flow between first cavity and heat transfer passageway, and the air can be in first cavity and heat transfer passageway internal reciprocating flow promptly to reach the purpose that carries out the inner loop heat dissipation to first cavity, and then reach the purpose that carries out the heat dissipation to first electronic component group.

The radiator is arranged in the second cavity, and can radiate heat from the first cavity, so that the purpose of radiating heat from the first cavity to the outside is achieved, and the purpose of radiating heat from the first electronic component group is achieved.

It is understood that the second chamber is in communication with the first tuyere, the second tuyere and the third tuyere, and the heat exchanger is further provided with a first opening, a second opening and a first channel. The first opening is communicated with the third air port and the first channel, and the first channel is also communicated with the second opening. The radiator in the second chamber is in indirect contact with the hot air in the first chamber for heat conduction, and the heat of the hot air in the first chamber is conducted to the radiator. The second fan works to drive cold air in the external environment to enter the second cavity through the first air opening, a part of cold air flows through the radiator and flows out of the case through the second air opening, heat at the radiator can be taken away when the cold air flows through the radiator so as to cool the radiator, air in the second cavity is discharged out of the case through the second air opening after heat exchange and temperature rise, so that the purpose of radiating the first cavity by the radiator is achieved, another part of cold air flows into the first channel through the third air opening, the cold air in the first channel and the heat exchange channel are heated into hot air after heat exchange by convection, and the hot air flows out of the heat exchanger through the second opening so as to achieve the purpose of radiating the heat exchange channel, and the purpose of radiating the first cavity is achieved.

Therefore, the structure of the power conversion equipment is reasonably arranged, so that the first chamber can be subjected to internal circulation heat dissipation and external heat dissipation. That is, the multiple modes are combined to radiate heat for multiple times to the first electronic component group in the first chamber, so that the radiating effect of the first electronic component group in the first chamber can be effectively improved, the purpose of rapidly radiating heat to the first electronic component group can be achieved, structural support is provided for guaranteeing the service life of the first electronic component group, the temperature in the first chamber can be reduced, and the service performance and service life of the whole machine can be improved.

Meanwhile, the second fan works to drive air to enter the second cavity through the first air port and flow out of the chassis through the second air port and the third air port, namely, the second fan works to drive the air to take away heat at the radiator and also take away heat at the heat exchange channel, that is to say, the flow path of the air in the power conversion equipment is reasonably limited, so that the second fan is shared when the radiator is cooled and the heat exchanger is cooled, the heat dissipation effect of the power conversion equipment is ensured, the input quantity of the fan can be reduced, and the production cost of the power conversion equipment is reduced.

The power conversion equipment can be a series-type inverter, is used for inputting direct current generated by illumination of a photovoltaic panel, and is converted into alternating current with certain frequency and voltage through the power conversion equipment to output, so that the alternating current is used as a part of green electric energy surfing. The power conversion device can also be a PCS (Power Conversion System, energy storage converter) which is connected with a load, a power grid, a battery pack and a photovoltaic panel to realize the function of more electricity consumption requirements. The power conversion device comprises, but is not limited to, the following functions of converting direct current generated by a photovoltaic panel into direct current for charging a battery pack or converting direct current generated by the photovoltaic panel into alternating current for a power grid and/or a load, converting the power grid alternating current and/or the photovoltaic direct current into direct current for charging the battery and/or alternating current for supplying power for the load, discharging the battery pack, and converting the discharged direct current into alternating current for the power grid and/or the load.

In some technical schemes, optionally, the second chamber is arranged above the first chamber, the two side walls of the second chamber are respectively provided with a first air port and a second air port, the side wall where the first air port is arranged and the side wall where the third air port is arranged are adjacently arranged, the heat exchanger is arranged above the first chamber and is positioned at one side of the second chamber with the third air port, or the heat exchanger is positioned at the side part of the first chamber, the case is also provided with a second channel, and the third air port is communicated with the heat exchanger through the second channel.

In this embodiment, the positional relationship between the first chamber and the second chamber is defined. The second cavity is arranged above the first cavity, a first air opening and a second air opening are respectively arranged on two side walls of the second cavity, the side wall where the first air opening is arranged is different from the side wall where the second air opening is arranged, and the side wall where the first air opening is arranged is adjacent to the side wall where the third air opening is arranged.

Illustratively, the sidewall of the first tuyere is disposed opposite to the sidewall of the second tuyere.

Illustratively, the sidewall of the first tuyere is disposed adjacent to the sidewall of the second tuyere.

When the side wall where the first air port is arranged and the side wall where the second air port is arranged are arranged oppositely, and the side wall where the first air port is arranged and the side wall where the third air port is arranged are arranged adjacently, the air entering the second cavity through the first air port can be effectively split to flow out to the third air port, so that the air quantity flowing through the first channel of the heat exchanger can be ensured, and structural support is provided for ensuring the heat exchange efficiency of the heat exchanger.

The heat exchanger is arranged above the first chamber and is positioned on one side of the second chamber with the third air port. That is, the heat exchanger, the second chamber and the devices in the second chamber are arranged on one side of the first chamber in a concentrated manner, so that the assembly difficulty of the power conversion equipment is reduced, and the assembly efficiency of the power conversion equipment is improved.

The heat exchanger is located the lateral part of first cavity, and the quick-witted case still is equipped with the second passageway, and the third wind gap is through second passageway intercommunication to the heat exchanger. That is, the second passage of the cabinet has a function of communicating the third air port with the heat exchanger. The second cavity and the heat exchanger are positioned on two adjacent sides of the first cavity, the arrangement is favorable for reducing the deflection of air flow when the air flows between the first cavity and the heat exchanger, reducing the flow loss of air, converting more energy into dynamic pressure and improving the heat exchange capacity of the air quantity and the heat exchanger.

In some embodiments, optionally, the heat sink is located between the first tuyere and the second tuyere.

In the technical scheme, the position relation of the radiator, the first air opening and the second air opening is further limited, so that the radiator is positioned at the first air opening and the second air opening, the contact area between the cold air flowing into the second cavity through the first air opening and the radiator is increased, the contact frequency between the cold air flowing into the second cavity through the first air opening and the radiator is increased, the radiating efficiency of the radiator is improved, and structural support is provided for effectively reducing the temperature of the first cavity.

In some aspects, optionally, the heat sink is located between the first tuyere and the first chamber.

In the technical scheme, the position relation of the radiator, the first air opening and the first cavity is limited, so that the radiator is positioned between the first air opening and the first cavity, namely, along the direction from the second cavity to the first cavity, the first air opening is positioned above the radiator, air entering the second cavity through the first air opening can effectively contact with the radiator, the contact area between cold air flowing into the second cavity through the first air opening and the radiator is favorably increased, the contact frequency between the cold air flowing into the second cavity through the first air opening and the radiator is favorably increased, the radiating efficiency of the radiator is favorably increased, and structural support is provided for effectively reducing the temperature of the first cavity.

In some embodiments, optionally, the heat sink is located between the first tuyere and the second tuyere, and the heat sink is located between the first tuyere and the first chamber.

In this technical solution, the positional relationship of the radiator, the first tuyere and the first chamber is defined such that the radiator is located between the first tuyere and the second tuyere, and the radiator is located between the first tuyere and the first chamber. It is understood that the number of the first air openings is plural, a part of the first air openings in the plurality of first air openings is positioned at one side of the radiator away from the second air opening, and another part of the first air openings in the plurality of first air openings is positioned at one side of the radiator away from the first chamber. This setting has increased the area of arranging of first wind gap, has increased the position of arranging of first wind gap, is favorable to promoting the contact frequency of cold air and radiator that flows into the second cavity through first wind gap, is favorable to promoting the radiating efficiency of radiator, provides structural support for effectively reducing the temperature of first cavity.

In some embodiments, optionally, the first opening and the second opening are disposed opposite.

In the technical scheme, the position relation of the first opening and the second opening is further limited, so that the first opening and the second opening are oppositely arranged, a first channel communicated between the first opening and the second opening is arranged in a strip shape, or the first channel communicated between the first opening and the second opening is arranged in a bending mode, the arrangement limits the flow path of air in the heat exchanger, is beneficial to reducing the deflection of the air when the air flows through the first channel, is beneficial to reducing the flow loss of the air, enables more energy to be converted into dynamic pressure, and is beneficial to improving the air quantity and the heat exchange capacity of the heat exchanger.

In some embodiments, optionally, the power conversion apparatus further comprises a first baffle group disposed in the second chamber, and the first opening is communicated with the first tuyere through the first baffle group.

In this technical solution, the structure of the power conversion apparatus is further defined such that the power conversion apparatus further includes a first baffle group.

The first baffle group is arranged in the second cavity, and the second cavity is used as an installation carrier of the first baffle group and has the functions of installing and fixing the first baffle group. The first opening is communicated with the first air port through the first baffle plate group. Thus, the second fan can drive air to flow into the second cavity through the first air opening, and a part of air flows to the first air opening through the first baffle group and flows out of the heat exchanger through the first air channel and the second opening in sequence.

It can be appreciated that the first baffle group is used for independently supplying cool air to the first channel of the heat exchanger, so that the distribution of air flowing into the second chamber through the first air port is facilitated, a part of air flows to the second air port through the radiator, and another part of air flows to the first channel of the heat exchanger through the first baffle group, so that structural support is provided for ensuring the heat dissipation effect of the radiator and the heat exchange effect of the heat exchanger.

In some embodiments, optionally, the first baffle group is located above the heat sink, and the first baffle group covers at least a portion of the third tuyere or has a gap between the first baffle group and the third tuyere.

In this technical solution, a cooperating structure of the first baffle group and the third tuyere is defined.

Specifically, along the direction from the second chamber to the first chamber, the first baffle group is located above the radiator, and the first baffle group covers at least a part of the third air port. When the first baffle group completely covers the third air port, the first baffle group blocks an airflow flow path flowing through the third air port to the first opening of the heat exchanger, that is, air flows into the second chamber through the first air port, a part of air flows through the radiator to the second air port, and another part of air can only flow to the first channel of the heat exchanger through the first baffle group and the first opening. When the first baffle group covers a part of the third air port, air flows into the second cavity through the first air port, the first part of air flows to the second air port through the radiator, the second part of air flows to the first channel of the heat exchanger through the first baffle group, and the third part of air flows to the first channel of the heat exchanger through the third air port.

Specifically, along the direction from the second chamber to the first chamber, the first baffle group is located above the radiator, a gap is formed between the first baffle group and the third air port, the first baffle group can not block the third air port, part of air in the second chamber can still flow to the first opening of the heat exchanger through the third air port, namely, the air flows into the second chamber through the first air port, the first part of air flows to the second air port through the radiator, the second part of air flows to the first channel of the heat exchanger through the first baffle group and the third air port, and the third part of air flows to the first channel of the heat exchanger through the third air port.

In some technical schemes, optionally, when the case is further provided with a second channel, the second channel is positioned above the heat exchanger, and the power conversion equipment further comprises a third fan which is arranged in the second channel, the case is further provided with a through-flow opening which is communicated with the second channel, and the third fan works to drive air to enter the second channel through the through-flow opening.

In this technical solution, the structure of the power conversion apparatus is further defined. The power conversion apparatus further includes a third fan. The third fan is arranged in the second channel, the case is also provided with a through-flow port, and the through-flow port is communicated with the second channel. It will be appreciated that the third fan is operated and air from the environment is able to enter the second passage through the flow port and flow to the first passage through the second passage. That is, the second channel has the overflow mouth with external environment intercommunication, and the second channel still communicates the second cavity through first opening, like this, is favorable to increasing the air volume that gets into the second channel in the unit time, is favorable to promoting the heat exchange efficiency of heat exchanger, and then is favorable to further promoting power conversion equipment's radiating effect.

Illustratively, the second passageway is located above the heat exchanger and the third tuyere is located at a side of the second passageway in a direction from the second chamber to the first chamber. This arrangement defines a mating arrangement of the second channel and the heat exchanger, defining a flow path for the air flow between the second chamber and the second channel.

In some embodiments, optionally, the power conversion device further comprises a bracket disposed in the second chamber, the second fan is disposed on the bracket, and the bracket is disposed between the first air port and the heat sink.

In this technical solution, the structure of the power conversion apparatus is further defined.

The power conversion equipment also comprises a bracket, wherein the bracket is arranged in the second chamber, and the second chamber is used as a mounting carrier of the bracket and has the functions of mounting and fixing the bracket. The second fan is arranged on the bracket, and the bracket has the function of supporting and fixing the second fan, so that the position relationship of the first air opening, the second air opening, the radiator and the second fan can be indirectly limited.

When the radiator is positioned between the first air port and the second air port, the bracket is positioned between the first air port and the radiator. That is, the first tuyere, the second fan, the heat sink, and the second tuyere are sequentially arranged. The arrangement of the first air opening and the second air opening is matched with the second fan, specifically, the air inlet side of the second fan is opposite to the first air opening, the air outlet side of the second fan is opposite to the second air opening, and when the second fan works, the air in the external environment can be effectively sucked into the second cavity to provide structural support.

When the radiator is positioned between the first air port and the first chamber, the bracket is positioned between the first air port and the radiator. That is, the first tuyere, the second fan, the heat sink and the first chamber are sequentially arranged. The setting position of first wind gap matches with the second fan, specifically, the income wind side of second fan sets up with first wind gap relatively, and the air-out side of second fan sets up with the radiator relatively, and this setting is when the second fan works, and external environment's air can be by effective suction into the second cavity and provide structural support.

In some technical schemes, optionally, the power conversion equipment further comprises a second electronic component group arranged in the second cavity, wherein the second electronic component group is positioned between the radiator and the second air port, and/or a third electronic component group arranged in the second cavity, and the third electronic component group is positioned on one side of the radiator away from the second air port.

When the power conversion equipment further comprises a second electronic component group, the second electronic component group is arranged in the second cavity, the second electronic component group is arranged between the radiator and the second air port, when the second fan works, cold air flowing into the second cavity through the first air port flows through the second electronic component group when flowing into the second air port, the purpose of radiating the second electronic component group can be achieved, the temperature of the second electronic component group can be reduced, the service life of the second electronic component group can be guaranteed, that is, the position of the second electronic component group is reasonably set, the second fan can be utilized for effectively radiating the second electronic component group while other radiating devices are not added, and the production cost of the power conversion equipment can be reduced.

When the power conversion equipment further comprises a third electronic element group, the third electronic element group is arranged in the second cavity, the third electronic element group is located at one side of the radiator, which is away from the second air port, and when the second fan works, part of cold air flowing into the second cavity through the first air port can flow through the third electronic element group, so that the purpose of radiating the third electronic element group can be achieved, the temperature of the third electronic element group can be reduced, the service life of the third electronic element group can be ensured, that is, the position of the third electronic element group is reasonably set, the second fan can be utilized for effectively radiating the third electronic element group while other radiating devices are not added, and the production cost of the power conversion equipment can be reduced.

In some embodiments, optionally, when a portion of the first electronic component group and the heat sink are disposed opposite to each other, the number of the first fans is two, and another portion of the first electronic component group is located between the two first fans.

In this embodiment, the arrangement position of the first electronic component group is further defined.

The number of the first fans is two. When a part of the first electronic component group and the radiator are oppositely arranged, the other part of the first electronic component group is positioned between the two first fans. The arrangement provides structural support for the air to flow back and forth between the first chamber and the heat exchange channel, so that the temperature of the first electronic component group can be effectively reduced, and the service life of the first electronic component group can be ensured.

In some embodiments, optionally, the power conversion device further comprises a flow guiding member disposed in the first chamber, and the flow guiding member is connected between the first fan and the heat exchange channel.

In this technical solution, the structure of the power conversion apparatus is defined.

The power conversion equipment further comprises a flow guide piece, wherein the flow guide piece is arranged in the first cavity and connected between the first fan and the heat exchange channel, the flow guide piece has a flow guide effect, the flow guide piece can limit the flow path of air flow between the first cavity and the heat exchange channel, and structural support is provided for ensuring air to flow between the first cavity and the heat exchange channel.

A second aspect of the application proposes a photovoltaic system comprising a power conversion device as in the first aspect.

The photovoltaic system provided by the application has all the beneficial effects of the power conversion device as in the first aspect, and is not stated here.

Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic view showing a partial structure of a power conversion apparatus of a first embodiment of the present application;

fig. 2 is a schematic diagram showing a first partial structure of a power conversion apparatus according to a second embodiment of the present application;

fig. 3 is a schematic diagram showing a second partial structure of a power conversion apparatus according to a second embodiment of the present application;

fig. 4 is a schematic view showing a first partial structure of a power conversion apparatus according to a third embodiment of the present application;

fig. 5 is a schematic view showing a second partial structure of a power conversion apparatus according to a third embodiment of the present application;

Fig. 6 is a schematic view showing a partial structure of a power conversion apparatus of a fourth embodiment of the present application;

Fig. 7 shows a schematic configuration diagram of a power conversion apparatus of a fourth embodiment of the present application;

Fig. 8 shows a schematic structural view of a heat exchanger according to an embodiment of the present application.

Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 8 is:

10 power conversion apparatus, 100 chassis, 110 first chamber, 120 second chamber, 130 first air port, 140 second air port, 150 third air port, 160 case, 162 back plate, 170 third baffle group, 200 first electronic component group, 300 first fan, 400 heat exchanger, 410 heat exchange channel, 420 first opening, 430 second opening, 440 first channel, 450 first air collecting shell, 460 second air collecting shell, 470 heat exchange body, 472 heat exchange tube group, 474 second fin, 500 radiator, 510 substrate, 520 first fin, 600 second fan, 700 first baffle group, 710 fourth air port, 720 fifth air port, 800 third chamber, 900 second baffle group, 910 through port, 1000 second channel, 1100 third fan, 1200 support, 1300 second electronic component group, 1400 third electronic component group, 1500 guide.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

A power conversion apparatus and a photovoltaic system according to some embodiments of the present application are described below with reference to fig. 1 to 8.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, a power conversion apparatus 10 according to some embodiments of the present application includes a cabinet 100, a first electronic component group 200, a first fan 300, a heat exchanger 400, a heat sink 500, and a second fan 600.

A first chamber 110 and a second chamber 120 are provided within the chassis 100.

The cabinet 100 is provided with a first air port 130, a second air port 140 and a third air port 150.

The second chamber 120 communicates with the first tuyere 130, the second tuyere 140 and the third tuyere 150.

The first electronic component set 200 is disposed in the first chamber 110.

The first fan 300 is disposed in the first chamber 110.

The heat exchanger 400 is provided at one side of the cabinet 100.

The heat exchanger 400 is provided with a heat exchanging channel 410, a first opening 420, a second opening 430 and a first channel 440.

Both ends of the heat exchanging channel 410 communicate with the first chamber 110.

The first opening 420 communicates with the third tuyere 150 and the first channel 440.

The first passage 440 also communicates with the second opening 430.

The heat sink 500 is disposed in the second chamber 120, and the heat sink 500 is used for dissipating heat from the first chamber 110.

The second fan 600 is disposed in the second chamber 120.

The first fan 300 operates to drive air to flow between the first chamber 110 and the heat exchanging channel 410.

The second fan 600 operates to drive air into the second chamber 120 through the first air port 130 and out of the chassis 100 through the second air port 140 and the third air port 150.

The present application provides a power conversion apparatus 10 including a cabinet 100, a first electronic component group 200, a first fan 300, a heat exchanger 400, a heat sink 500, and a second fan 600.

The first chamber 110 and the second chamber 120 are disposed in the case 100, and the case 100 is provided with a first air port 130, a second air port 140, and a third air port 150. The first electronic component set 200 and the first fan 300 are both disposed in the first chamber 110, and the heat sink 500 and the second fan 600 are both disposed in the second chamber 120. The first chamber 110 has a function of accommodating and fixing the first electronic component and the first fan 300, and the second chamber 120 has a function of accommodating and fixing the heat sink 500 and the second fan 600.

The heat exchanger 400 is provided at one side of the cabinet 100, that is, the heat exchanger 400 is provided independently of the cabinet 100, and the heat exchanger 400 is located at the outside of the cabinet 100. The heat exchanger 400 is provided with heat exchanging channels 410. Both ends of the heat exchanging channel 410 communicate with the first chamber 110. In this way, the first fan 300 can drive air to flow between the first chamber 110 and the heat exchange channel 410, that is, air can flow reciprocally in the first chamber 110 and the heat exchange channel 410, so as to achieve the purpose of performing internal circulation heat dissipation on the first chamber 110, and further achieve the purpose of performing heat dissipation on the first electronic component group 200.

The heat sink 500 is disposed in the second chamber 120, and the heat sink 500 can dissipate heat from the first chamber 110, so as to dissipate heat from the first chamber 110 outside the first chamber 110, and further dissipate heat from the first electronic component set 200.

It is understood that the second chamber 120 communicates with the first tuyere 130, the second tuyere 140 and the third tuyere 150, and the heat exchanger 400 is further provided with a first opening 420, a second opening 430 and a first channel 440. The first opening 420 communicates with the third tuyere 150 and the first passage 440, and the first passage 440 also communicates with the second opening 430. The heat sink 500 in the second chamber 120 is in indirect contact with the hot air in the first chamber 110, and the heat of the hot air in the first chamber 110 is transferred to the heat sink 500. The second fan 600 works to drive cold air in the external environment to enter the second chamber 120 through the first air port 130, a part of cold air flows through the radiator 500 and flows out of the case 100 through the second air port 140, when the cold air flows through the radiator 500, heat at the radiator 500 can be taken away to cool the radiator 500, air in the second chamber 120 is discharged out of the case 100 through the second air port 140 after heat exchange and temperature rise, so that the purpose of the radiator 500 for radiating the first chamber 110 is achieved, another part of cold air flows into the first channel 440 through the third air port 150, the cold air in the first channel 440 and the heat exchange channel 410 are heated into hot air after convection heat, and the hot air flows out of the heat exchanger 400 through the second opening 430, so that the purpose of radiating the heat exchange channel 410 is achieved, and the purpose of radiating the first chamber 110 is achieved.

As can be seen, the present application reasonably sets the structure of the power conversion device 10, so that the first chamber 110 can be cooled by internal circulation and the first chamber 110 can be cooled by external heat. That is, the multiple ways are combined to perform multiple heat dissipation on the first electronic component group 200 in the first chamber 110, so that the heat dissipation effect on the first electronic component group 200 in the first chamber 110 can be effectively improved, the purpose of rapid heat dissipation on the first electronic component group 200 can be achieved, structural support is provided for ensuring the service life of the first electronic component group 200, the temperature in the first chamber 110 can be reduced, and the service performance and service life of the whole machine can be improved.

Meanwhile, the second fan 600 can drive air to enter the second chamber 120 through the first air port 130 and flow out of the chassis 100 through the second air port 140 and the third air port 150, that is, the second fan 600 can drive air to take away heat at the radiator 500 and also take away heat at the heat exchanging channel 410, that is, a flow path of the air in the power exchanging device 10 is reasonably limited, so that the second fan 600 is shared when the radiator 500 is cooled and the heat exchanger 400 is cooled, the heat dissipation effect of the power exchanging device 10 is ensured, the input of the fan is reduced, and the production cost of the power exchanging device 10 is reduced.

The power conversion device 10 of the present application may be a string inverter, and the dc power generated by the light of the photovoltaic panel is input, and converted into ac power with a certain frequency and voltage by the power conversion device 10 of the present application to be output, as a part of the green power surfing. The power conversion device 10 of the present application may also be a PCS (Power Conversion System, energy storage converter) connected to a load, a grid, a battery pack, and a photovoltaic panel to achieve the function of more electricity demand. The power conversion apparatus 10 of the present application includes, but is not limited to, functions of converting direct current generated by a photovoltaic panel into direct current for charging a battery pack, or converting direct current generated by a photovoltaic panel into alternating current for a power grid and/or a load, converting power grid alternating current and/or photovoltaic direct current into direct current for charging a battery and/or alternating current for powering a load, discharging a battery pack, and converting discharged direct current into alternating current for a power grid and/or a load by the power conversion apparatus 10.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, with a heat sink 500 located between the first air port 130 and the second air port 140.

In this embodiment, the positional relationship among the radiator 500, the first air port 130 and the second air port 140 is further defined, so that the radiator 500 is located at the first air port 130 and the second air port 140, which is beneficial to increasing the contact area between the cold air flowing into the second chamber 120 through the first air port 130 and the radiator 500, to increasing the contact frequency between the cold air flowing into the second chamber 120 through the first air port 130 and the radiator 500, to increasing the heat dissipation efficiency of the radiator 500, and to provide structural support for effectively reducing the temperature of the first chamber 110.

In other embodiments, the first and second vents 130, 140 are located on adjacent sides of the chassis 100.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, and the heat sink 500 is located between the first air port 130 and the first chamber 110.

In this embodiment, the positional relationship of the heat sink 500, the first air opening 130 and the first chamber 110 is defined, so that the heat sink 500 is located between the first air opening 130 and the first chamber 110, that is, along the direction from the second chamber 120 to the first chamber 110, the first air opening 130 is located above the heat sink 500, and the air entering the second chamber 120 through the first air opening 130 can effectively contact with the heat sink 500, which is beneficial to increasing the contact area between the cold air flowing into the second chamber 120 through the first air opening 130 and the heat sink 500, and to increasing the contact frequency between the cold air flowing into the second chamber 120 through the first air opening 130 and the heat sink 500, and to increasing the heat dissipation efficiency of the heat sink 500, and to provide structural support for effectively reducing the temperature of the first chamber 110.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, in which the heat sink 500 is located between the first air port 130 and the second air port 140, and the heat sink 500 is located between the first air port 130 and the first chamber 110.

In this embodiment, the positional relationship of the heat sink 500, the first tuyere 130, and the first chamber 110 is defined such that the heat sink 500 is located between the first tuyere 130 and the second tuyere 140, and the heat sink 500 is located between the first tuyere 130 and the first chamber 110. It is understood that the number of the first air openings 130 is plural, and a part of the first air openings 130 in the plurality of first air openings 130 is located at a side of the heat sink 500 facing away from the second air opening 140, and another part of the first air openings 130 in the plurality of first air openings 130 is located at a side of the heat sink 500 facing away from the first chamber 110. This arrangement increases the arrangement area of the first air port 130, increases the arrangement position of the first air port 130, is favorable to improving the contact frequency between the cold air flowing into the second chamber 120 through the first air port 130 and the radiator 500, is favorable to improving the heat dissipation efficiency of the radiator 500, and provides structural support for effectively reducing the temperature of the first chamber 110.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, in which the first opening 420 and the second opening 430 are disposed opposite to each other.

In this embodiment, the positional relationship of the first opening 420 and the second opening 430 is further defined such that the first opening 420 and the second opening 430 are disposed opposite to each other, the first passage 440 communicating between the first opening 420 and the second opening 430 is arranged in a stripe shape, or the first passage 440 communicating between the first opening 420 and the second opening 430 is arranged in a curved shape, which defines the flow path of the air in the heat exchanger 400, which is advantageous in reducing the deflection of the air when the air flows through the first passage 440, reducing the flow loss of the air, converting more energy into dynamic pressure, and improving the air volume and the heat exchanging capability of the heat exchanger 400.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above embodiments, in which the first air port 130 and the third air port 150 are located on adjacent two sides of the chassis 100.

In this embodiment, the positional relationship of the first and third air ports 130 and 150 is further defined such that the first and third air ports 130 and 150 are located at adjacent both sides of the cabinet 100. That is, the first and second air ports 130 and 140 are located at opposite sides of the cabinet 100, and the first and third air ports 130 and 150 are located at adjacent sides of the cabinet 100, which enables air entering the second chamber 120 through the first air port 130 to be effectively branched off to a part of the third air port 150, so that an amount of air flowing through the first passage 440 of the heat exchanger 400 can be ensured, and structural support is provided for ensuring heat exchange efficiency of the heat exchanger 400.

In other embodiments, when the heat sink 500 is located between the first and second vents 130 and 140, the third and second vents 150 and 140 are located on the same side of the chassis 100.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 2, 3 and 4, the power conversion apparatus 10 further includes a first barrier group 700.

The first baffle group 700 is disposed in the second chamber 120.

The first barrier group 700 encloses a third chamber 800 with the inner surface of the cabinet 100.

The first barrier group 700 is provided with a fourth tuyere 710 and a fifth tuyere 720.

The fourth tuyere 710 communicates the first tuyere 130 and the third chamber 800.

The fifth tuyere 720 communicates the third chamber 800 and the first opening 420.

In this embodiment, the structure of the power conversion apparatus 10 is further defined such that the power conversion apparatus 10 further includes the first barrier group 700.

The first baffle group 700 is disposed in the second chamber 120, and the second chamber 120 serves as a mounting carrier for the first baffle group 700, and has a function of mounting and fixing the first baffle group 700. The first barrier group 700 encloses a third chamber 800 with the inner surface of the cabinet 100. The first baffle group 700 is provided with a fourth air port 710 and a fifth air port 720, the third chamber 800 communicates with the fourth air port 710 and the fifth air port 720, the fourth air port 710 also communicates with the first air port 130, and the fifth air port 720 also communicates with the first opening 420.

Thus, the second fan 600 operates to drive air to flow into the second chamber 120 through the first air port 130, a portion of the air flows into the third chamber 800 through the fourth air port 710, flows into the first air port 130 through the fifth air port 720, and flows out of the heat exchanger 400 through the first air duct and the second opening 430 in sequence.

It can be appreciated that the third chamber 800 is a hollow structure, and the third chamber 800 is used to separately supply the first channel 440 of the heat exchanger 400 with cold air, so that the air flowing into the second chamber 120 through the first air port 130 is more advantageously distributed, so that a part of air flows through the heat radiator 500 to the second air port 140, and another part of air flows through the third chamber 800 to the first channel 440 of the heat exchanger 400, so as to provide structural support for ensuring the heat dissipation effect of the heat radiator 500 and the heat exchange effect of the heat exchanger 400.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above embodiments, and the first baffle group 700 is located above the heat sink 500 along the direction from the second chamber 120 to the first chamber 110.

The first baffle group 700 covers at least a portion of the third tuyere 150 or has a gap between the first baffle group 700 and the third tuyere 150.

In this embodiment, a mating structure of the first baffle group 700 and the third tuyere 150 is defined.

Specifically, the first baffle group 700 is located above the heat sink 500 in a direction from the second chamber 120 to the first chamber 110, and the first baffle group 700 covers at least a portion of the third tuyere 150. When the first barrier group 700 completely covers the third air port 150, the first barrier group 700 blocks an airflow path flowing through the third air port 150 to the first opening 420 of the heat exchanger 400, that is, air flows into the second chamber 120 through the first air port 130, a portion of the air flows through the radiator 500 to the second air port 140, and another portion of the air can flow only through the fourth air port 710, the third chamber 800, the fifth air port 720 and the first opening 420 to the first passage 440 of the heat exchanger 400. When the first baffle group 700 covers a portion of the third air port 150, air flows into the second chamber 120 through the first air port 130, a first portion of air flows into the second air port 140 through the radiator 500, a second portion of air flows into the first passage 440 of the heat exchanger 400 through the fourth air port 710, the third chamber 800, the fifth air port 720 and the third air port 150, and a third portion of air flows into the first passage 440 of the heat exchanger 400 through the third air port 150, the arrangement is such that air can flow into the first passage 440 of the heat exchanger 400 from a plurality of positions, an amount of air flowing into the first passage 440 of the heat exchanger 400 can be ensured, and structural support is provided for ensuring a heat exchanging effect of the heat exchanger 400.

Specifically, in the direction from the second chamber 120 to the first chamber 110, the first baffle group 700 is located above the heat sink 500, a gap is provided between the first baffle group 700 and the third air port 150, the first baffle group 700 does not block the third air port 150, a portion of air in the second chamber 120 can still flow to the first opening 420 of the heat exchanger 400 through the third air port 150, that is, air flows into the second chamber 120 through the first air port 130, a first portion of air flows to the second air port 140 through the heat sink 500, a second portion of air flows to the first passage 440 of the heat exchanger 400 through the fourth air port 710, the third chamber 800, the fifth air port 720 and the third air port 150, and a third portion of air flows to the first passage 440 of the heat exchanger 400 through the third air port 150.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 4 and 6, and the power conversion apparatus 10 further includes a second barrier group 900.

The second baffle group 900 is disposed at one side of the chassis 100.

The second barrier group 900 encloses a second channel 1000 with the outer surface of the chassis 100.

The first opening 420 communicates with the third tuyere 150 through the second channel 1000.

In this embodiment, the structure of the power conversion apparatus 10 is further defined.

The power conversion device 10 further includes a second baffle group 900, where the second baffle group 900 is disposed on one side of the chassis 100, the second baffle group 900 and an outer surface of the chassis 100 enclose a second channel 1000, the second channel 1000 is communicated with the first opening 420, and the second channel 1000 is also communicated with the third air port 150. That is, the first opening 420 communicates with the third air port 150 through the second channel 1000, air flows into the second channel 1000 through the third air port 150, flows into the first opening 420 through the second channel 1000, flows into the first channel 440 through the first opening 420, and flows out of the heat exchanger 400 through the second opening 430.

The second channel 1000 has a function of defining a flow path of air flowing to the first opening 420 through the third air port 150, and the channel wall of the second channel 1000 has a diffusion function, so that the speed of the air flowing in from the third air port 150 can be high, the deflection of the air flowing through the second channel 1000 can be reduced, the flow loss of the air is reduced, more energy is converted into dynamic pressure, and the air quantity is improved. Meanwhile, the second air duct has the function of collecting flow, so that the frequency of phenomena such as airflow flow separation, vortex and the like is reduced, the operation noise of the power conversion equipment 10 is reduced, and the service performance of the power conversion equipment 10 is improved.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 6 and 7, the power conversion apparatus 10 further includes a third fan 1100.

The third fan 1100 is disposed in the second channel 1000.

The second baffle group 900 is provided with a through-flow port 910.

The vent 910 communicates with the second passage 1000.

The third fan 1100 operates to drive air into the second channel 1000 through the flow port 910.

In this embodiment, the structure of the power conversion apparatus 10 is further defined. The power conversion device 10 further includes a third fan 1100. The third fan 1100 is disposed in the second channel 1000, the second baffle group 900 is provided with a through-flow port 910, and the through-flow port 910 is communicated with the second channel 1000. It will be appreciated that the third fan 1100 is operated and air from the external environment can enter the second passage 1000 through the flow port 910 and flow to the first passage 440 through the second passage 1000. That is, the second channel 1000 has a through-flow port 910 communicating with the external environment, and the second channel 1000 is further communicated with the second chamber 120 through the first opening 420, which is beneficial to increasing the air amount entering the second channel 1000 in unit time, improving the heat exchange efficiency of the heat exchanger 400, and further improving the heat dissipation effect of the power conversion device 10.

Illustratively, the second passageway 1000 is located above the heat exchanger 400 in a direction from the second chamber 120 to the first chamber 110, and the third tuyere 150 is located at a side of the second passageway 1000. This arrangement defines the mating structure of the second channel 1000 and the heat exchanger 400, defining the flow path of the air flow between the second chamber 120 and the second channel 1000.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 1, 2, 4 and 6, the power conversion apparatus 10 further includes a stand 1200.

The holder 1200 is disposed within the second chamber 120.

The second fan 600 is provided to the bracket 1200.

The bracket 1200 is located between the first tuyere 130 and the heat sink 500.

The power conversion apparatus 10 further includes a bracket 1200, the bracket 1200 is disposed in the second chamber 120, and the second chamber 120 serves as a mounting carrier for the bracket 1200, and has the function of mounting and fixing the bracket 1200. The second fan 600 is disposed on the bracket 1200, and the bracket 1200 has the function of supporting and fixing the second fan 600, and can indirectly define the positional relationship of the first air port 130, the second air port 140, the heat sink 500 and the second fan 600.

When the heat sink 500 is located between the first tuyere 130 and the second tuyere 140, the bracket 1200 is located between the first tuyere 130 and the heat sink 500. That is, the first tuyere 130, the second fan 600, the heat sink 500, and the second tuyere 140 are sequentially arranged. The arrangement of the first and second air openings 130, 140 matches the arrangement of the second fan 600, specifically, the air inlet side of the second fan 600 is arranged opposite to the first air opening 130, and the air outlet side of the second fan 600 is arranged opposite to the second air opening 140, which is such that when the second fan 600 is in operation, air of the external environment can be effectively sucked into the second chamber 120 to provide structural support.

When the heat sink 500 is located between the first tuyere 130 and the first chamber 110, the bracket 1200 is located between the first tuyere 130 and the heat sink 500. That is, the first tuyere 130, the second fan 600, the heat sink 500 and the first chamber 110 are sequentially arranged. The first air port 130 is disposed at a position matching with the second fan 600, specifically, the air inlet side of the second fan 600 is disposed opposite to the first air port 130, and the air outlet side of the second fan 600 is disposed opposite to the heat sink 500, so that when the second fan 600 works, the air in the external environment can be effectively sucked into the second chamber 120 to provide structural support.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 1, 2, 4 and 6, the power conversion apparatus 10 further includes a second electronic component group 1300 and/or a third electronic component group 1400.

The second electronic component set 1300 is disposed in the second chamber 120.

The second electronic component group 1300 is located between the heat sink 500 and the second air port 140.

The third electronic component set 1400 is disposed in the second chamber 120.

The third electronic component set 1400 is located at a side of the heat spreader 500 facing away from the second air port 140.

When the power conversion apparatus 10 further includes the second electronic component group 1300, the second electronic component group 1300 is disposed in the second chamber 120, the second electronic component group 1300 is disposed between the radiator 500 and the second air port 140, and when the second fan 600 works, cold air flowing into the second chamber 120 through the first air port 130 will flow through the second electronic component group 1300 when flowing into the second air port 140, so as to achieve the purpose of dissipating heat of the second electronic component group 1300, reduce the temperature of the second electronic component group 1300, and ensure the service life of the second electronic component group 1300, that is, the position of the second electronic component group 1300 is reasonably set, and the second fan 600 can be utilized to effectively dissipate heat of the second electronic component group 1300 while other radiator 500 pieces are not added, thereby being beneficial to reducing the production cost of the power conversion apparatus 10.

When the power conversion apparatus 10 further includes the third electronic component set 1400, the third electronic component set 1400 is disposed in the second chamber 120, the third electronic component set 1400 is located at a side of the radiator 500 away from the second air port 140, and when the second fan 600 works, a part of the cold air flowing into the second chamber 120 through the first air port 130 flows through the third electronic component set 1400, so that the purpose of cooling the third electronic component set 1400 can be achieved, the temperature of the third electronic component set 1400 can be reduced, the service life of the third electronic component set 1400 can be ensured, that is, the position of the third electronic component set 1400 is reasonably set, the second fan 600 can be utilized to effectively cool the third electronic component set 1400 while other radiator 500 pieces are not added, and the production cost of the power conversion apparatus 10 can be reduced.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 1, 2, 4, 6 and 7, and the cabinet 100 includes a cabinet 160 and a third barrier group 170.

The case 160 has a first chamber 110 therein.

The housing 160 includes a back plate 162.

The heat exchanger 400 is located at one side of the case 160.

The third baffle group 170 is located at one side of the case 160, and the third baffle group 170 is connected to the back plate 162.

The third barrier group 170 encloses the second chamber 120 with the outer surface of the case 160.

The third barrier group 170 is provided with a first tuyere 130, a second tuyere 140, and a third tuyere 150.

At least a portion of the first electronic component group 200 and the heat spreader 500 are located on opposite sides of the back plane 162.

In this embodiment, the chassis 100 includes a cabinet 160 and a third baffle group 170.

The housing 160 has a first chamber 110 therein, and the housing 160 includes a back plate 162. The third baffle group 170 is located at one side of the case 160, and the third baffle group 170 is connected to the back plate 162. The third barrier group 170 encloses the second chamber 120 with the outer surface of the case 160.

That is, the case 160 and the third barrier group 170 enclose the first chamber 110 and the second chamber 120.

At least a portion of the first electronic component set 200 and the heat sink 500 are located on opposite sides of the back plate 162, and the arrangement shortens the distance between the heat sink 500 and the first electronic component set 200, so that heat of the first electronic component set 200 can be quickly conducted to the heat sink 500, which is beneficial to improving heat dissipation efficiency of the heat sink 500.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 3, a heat sink 500 includes a base plate 510 and a plurality of first fins 520.

The substrate 510 is in contact with the back plate 162.

The plurality of first fins 520 are disposed on a side of the base plate 510 facing away from the case 160.

The plurality of first fins 520 are spaced apart in the first direction.

The heat exchange channels 410 extend in a second direction and the first channels 440 extend in a first direction.

In this embodiment, the structure of the heat sink 500 is defined.

The heat spreader 500 includes a substrate 510 and a plurality of first fins 520, the substrate 510 abutting against a back plate 162, the back plate 162 being located between the substrate 510 and at least a portion of the first electronic component group 200. The arrangement can shorten the distance between the radiator 500 and the first electronic component group 200, so that the heat of the first electronic component group 200 can be quickly conducted to the radiator 500, which is beneficial to improving the heat dissipation efficiency of the radiator 500.

In addition, the plurality of first fins 520 are all arranged on one side of the substrate 510 away from the box 160, and the plurality of first fins 520 are arranged at intervals along the first direction, so that the heat dissipation area of the radiator 500 can be increased by arranging the plurality of first fins 520, which is beneficial to improving the heat dissipation effect of the radiator 500.

It will be appreciated that an air channel is formed between two adjacent first fins 520, the first air channel extends in the second direction, the heat exchange channel 410 extends in the second direction, and the first channel 440 extends in the first direction. The first direction is different from the second direction, e.g., the first direction is perpendicular to the second direction, e.g., the first direction forms an acute or obtuse angle with the second direction.

Illustratively, the first air port 130 and the second air port 140 are arranged along the second direction, and the extending direction of the air channel formed by the radiator 500 is matched with the positions of the first air port 130 and the second air port 140, that is, the extending direction of the air channel formed by the radiator 500 is consistent with the ventilation direction of the second chamber 120, so that the heat exchange efficiency of the heat dissipation member and the cold air entering the second chamber 120 is improved, and the heat dissipation efficiency of the heat dissipation member to the first chamber 110 can be improved.

The present embodiment provides a power conversion apparatus 10, which further includes technical features in addition to those of the above-described embodiments, in which the number of first fans 300 is two when a part of the first electronic component group 200 and the heat sink 500 are located on opposite sides of the back plate 162, and another part of the first electronic component group 200 is located between the two first fans 300.

In this embodiment, the set position of the first electronic component group 200 is further defined.

The number of the first fans 300 is two. When a portion of the first electronic component group 200 and the heat sink 500 are located at opposite sides of the back plate 162, another portion of the first electronic component group 200 is located between the two first fans 300. This arrangement provides structural support for air to reciprocate between the first chamber 110 and the heat exchange channels 410, which can effectively reduce the temperature at the first electronic component group 200, and can ensure the service life of the first electronic component group 200.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above embodiments, in which the third baffle group 170 and the heat exchanger 400 are located on the same side of the case 160, or in which the third baffle group 170 and the heat exchanger 400 are located on adjacent sides of the case 160.

In this embodiment, the positional relationship of the third barrier group 170, the heat exchanger 400, and the tank 160 is further defined.

The third baffle group 170 and the heat exchanger 400 are located on the same side of the tank 160. The first baffle group 700 and the heat exchanger 400 are intensively arranged at one side of the case 160, which is advantageous in reducing the difficulty of assembling the power conversion apparatus 10 and in improving the efficiency of assembling the power conversion apparatus 10.

The third baffle group 170 and the heat exchanger 400 are located on two adjacent sides of the box 160, which is beneficial to reducing the deflection of the air flow when flowing between the box 160 and the heat exchanger 400, reducing the flow loss of the air, converting more energy into dynamic pressure, and improving the air quantity and the heat exchange capacity of the heat exchanger 400.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiment, as shown in fig. 3 and 5, the power conversion apparatus 10 further includes a flow guide 1500.

The flow guide 1500 is disposed within the first chamber 110.

The flow guide 1500 is connected between the first fan 300 and the heat exchange passage 410.

In this embodiment, the structure of the power conversion apparatus 10 is defined.

The power conversion apparatus 10 further includes a flow guiding member 1500, where the flow guiding member 1500 is disposed in the first chamber 110, the flow guiding member 1500 is connected between the first fan 300 and the heat exchange channel 410, the flow guiding member 1500 has a flow guiding function, and the flow guiding member 1500 can define a flow path of the air flow between the first chamber 110 and the heat exchange channel 410, so as to provide structural support for ensuring the air flow between the first chamber 110 and the heat exchange channel 410.

The present embodiment provides a power conversion apparatus 10, which further includes the following technical features in addition to the technical features of the above-described embodiments, as shown in fig. 1, 2 and 8, the heat exchanger 400 includes a first collecting case 450, a second collecting case 460 and a heat exchange body 470.

The heat exchange body 470 is connected between the first and second wind collecting housings 450 and 460.

The heat exchange body 470 includes a plurality of heat exchange tube groups 472 and a plurality of second fins 474.

Each heat exchange tube group 472 is provided with at least one heat exchange channel 410.

Each heat exchange channel 410 communicates with the first chamber 110 through the first and second collecting shells 450 and 460.

The plurality of heat exchange tube groups 472 are arranged at intervals in the direction from the second chamber 120 to the first chamber 110.

A plurality of second fins 474 are provided between adjacent two heat exchange tube groups 472 at intervals in the second direction.

In the adjacent two heat exchange tube groups 472, the plurality of second fins 474 and the two heat exchange tube groups 472 enclose the plurality of first channels 440, the first openings 420, and the second openings 430.

In this embodiment, the heat exchanger 400 includes a first collecting case 450, a second collecting case 460, and a heat exchange body 470.

The heat exchange body 470 is connected between the first and second wind collecting housings 450 and 460, the first wind collecting housing 450 communicates with the first chamber 110, and the second wind collecting housing 460 also communicates with the first chamber 110.

The heat exchange body 470 includes a plurality of heat exchange tube groups 472, and the plurality of heat exchange tube groups 472 are spaced apart in a direction from the second chamber 120 to the first chamber 110. Each heat exchange tube group 472 is provided with at least one heat exchange passage 410, and each heat exchange passage 410 communicates with the first chamber 110 through the first and second wind collecting housings 450 and 460. A plurality of second fins 474 are provided between any adjacent two heat exchange tube groups 472, and the plurality of second fins 474 are arranged at intervals in the second direction.

In the adjacent two heat exchange tube groups 472, the plurality of second fins 474 and the two heat exchange tube groups 472 enclose a plurality of first passages 440, first openings 420 and second openings 430, and each first passage 440 communicates with the first opening 420 and the second opening 430.

When the heat exchange tube group 472 includes a plurality of heat exchange channels 410, the plurality of heat exchange channels 410 are arranged at intervals in the first direction.

Specifically, the first fan 300 operates, and air in the first chamber 110 flows through the first collecting case 450 to the heat exchange body 470, flows through the plurality of heat exchange passages 410 of the heat exchange body 470 to the second collecting case 460, and flows back through the second collecting case 460 to the first chamber 110.

The heat exchanger 400 is provided with a plurality of heat exchange channels 410 and a plurality of first channels 440, and each heat exchange channel 410 is provided with a plurality of first channels 440, so that the heat exchange effect of each heat exchange channel 410 can be ensured, and the heat exchange efficiency of the heat exchanger 400 can be improved.

A photovoltaic system according to further embodiments of the present application includes the power conversion apparatus 10 of any of the embodiments described above.

The photovoltaic system provided by the application comprises the power conversion device 10 of any embodiment, so that the photovoltaic system has all the beneficial effects of the power conversion device 10, and is not described herein.

Illustratively, the first chamber 110 is a closed chamber.

Illustratively, the power conversion apparatus 10 of the present application is provided as part of a new energy power grid system, and the power conversion apparatus 10 of the present application includes, but is not limited to, for power conversion of photovoltaic power or battery-stored power.

Illustratively, a chassis 100, a device to be heat-dissipated, a heat sink 500, and a heat exchanger 400. The device to be heat-dissipated includes a first electronic component group 200, a second electronic component group 1300, and a third electronic component group 1400. The cabinet 100 includes a cabinet 160 and a third barrier group 170, and the cabinet 160 is a sealed structure.

Illustratively, the case 160 is used to mount the first electronic component set 200, where the first electronic component set 200 includes, but is not limited to, circuit boards with different functions, inverter modules, boost modules, power inductors, capacitors, inductors, and the like, which are not listed herein.

Illustratively, the different side plates of the case 160 have various through holes for electrically connecting the first electronic component group 200 with the second electronic component group 1300 and/or the third electronic component group 1400 located outside the case 160. The junction of the case 160 and the radiator 500, inductor, connector, etc. located outside the case 160 is provided with a sealing structure to isolate the first chamber 110 from the external environment.

Illustratively, the heat sink 500 includes a base plate 510 and a plurality of first fins 520, the plurality of first fins 520 being spaced apart along a first direction. The substrate 510 is mounted on the back plate 162 of the case 160, and the substrate 510 is in contact with the first electronic component group 200 through a heat conductive material to conduct heat.

Illustratively, at least one of the second electronic component group 1300 and the third electronic component group 1400 includes an inductance core and a heat dissipation case provided with a tooth sheet to increase the heat exchange area, and the second electronic component group 1300 and the third electronic component group 1400 are both disposed outside the case 160. The second electronic component group 1300 is located at one of the inlet side and the outlet side of the heat sink 500. The third electronic component group 1400 is located at the other one of the inlet side and the outlet side of the heat sink 500.

Illustratively, the heat exchanger 400 includes a first plenum 450, a second plenum 460, and a heat exchange body 470. The heat exchanger 400 is a device for exchanging heat between the hot air in the case 160 and the cold air in the external environment. The heat exchanger 400 is disposed outside the case 160, and through holes communicating with the inlet and the outlet of the heat exchanger 400 are formed in the case 160. The heat exchange body 470 includes a plurality of heat exchange tube groups 472 and a plurality of second fins 474. The heat exchange tube group 472 is provided with at least one heat exchange channel 410. Both ends of the heat exchanging channel 410 are respectively communicated with the first and second wind collecting housings 450 and 460 at both ends of the heat exchanging body 470. The first collecting housing 450 is provided with at least one first communication port for connection with the corresponding heat exchanging channel 410, and the first collecting housing 450 is provided with at least one second communication port for communication with the first chamber 110. The second air collecting case 460 is provided with at least one first communication port for being connected with the corresponding heat exchanging channel 410, and the second air collecting case 460 is provided with at least one second communication port for being communicated with the first chamber 110. Adjacent two heat exchange tube groups 472 and a plurality of second fins 474 enclose a plurality of first channels 440, first openings 420 and second openings 430. The heat exchange channels 410 are perpendicular to the first channels 440. The heat exchange channel 410 and the first channel 440 are physically isolated by the heat exchange body 470, the first collecting casing 450 and the second collecting casing 460. When the heat exchange channels 410 and the first channels 440 are respectively circulated with a corresponding fluid medium (e.g., air), and a temperature difference exists between the fluid medium in the heat exchange channels 410 and the fluid medium in the first channels 440, the heat exchanger 400 can exchange heat between the inside and the outside. For example, the heat exchange channel 410 is a high-temperature fluid medium, the first channel 440 is a low-temperature fluid medium, and when the heat exchanger 400 works, the high-temperature fluid medium is cooled down after passing through the heat exchange channel 410, and the fluid medium is heated up after passing through the first channel 440.

Wherein arrows in fig. 1, 2, 3, 4 and 8 indicate the flow direction of the air.

As shown in fig. 1, the heat exchanger 400 is provided outside the sealed case 160, and the heat exchanger 400 and the radiator 500 are located on the same side of the case 160. The case 160 is provided with two through holes, one of which communicates with one end of the heat exchanging channel 410 of the heat exchanger 400 and the other of which communicates with the other end of the heat exchanging channel 410 of the heat exchanger 400. The heat exchanger 400 is located at one side of the heat sink 500. The third baffle group 170 separates the heat exchanger 400 from the radiator 500. The third baffle group 170 is provided with a third tuyere 150, and the third tuyere 150 communicates with the first passage 440 of the heat exchanger 400. The number of the third tuyeres 150 is at least one. The third air port 150 is disposed corresponding to the first passages 440 of the heat exchanger 400, so that air uniformly flows through the plurality of first passages 440 of the heat exchanger 400, thereby improving heat exchange efficiency of the heat exchanger 400. The second fan 600 is mounted on the bracket 1200, the second fan 600 being located between the third electronic component group 1400 and the heat sink 500, the third electronic component comprising an inductance. The second electronic component set 1300 is located between the heat sink 500 and the second air port 140, and the second electronic component set 1300 includes an inductor. The first and second tuyeres 130 and 140 of the third barrier group 170 are in communication with the external environment. When the second fan 600 is operated, on one hand, the second fan 600 drives air to flow through the first air port 130, the third electronic component group 1400, the heat sink 500, the second electronic component group 1300 and the second air port 140 in sequence, and on the other hand, a part of the air driven by the second fan 600 turns to flow to the third air port 150 and flows to the first channel 440 through the third air port 150. The air in the second chamber 120 and the first passage 440 is driven by one or more second fans 600. The inside of the case 160 is provided with a guide 1500 that is engaged with the first collecting case 450 of the heat exchanger 400, or the inside of the case 160 is provided with a guide 1500 that is engaged with the second collecting case 460 of the heat exchanger 400. The air guide 1500 cooperates with the first fan 300 to drive air to circulate between the first chamber 110 and the heat exchange channel 410, so as to reduce the temperature in the first chamber 110, thereby reducing the temperature of the first electronic component set 200 and improving the reliability of use. Wherein the number of the first fans 300 is at least one, the number of the second fans 600 is at least one, and the number of the third fans 1100 is at least one.

The power conversion apparatus 10 shown in fig. 2 and 3 has a first barrier group 700 added thereto as compared to the power conversion apparatus 10 shown in fig. 1. The first baffle group 700 is provided with a fourth air port 710 and a fifth air port 720, the fourth air port 710 is located at the air outlet side of the second fan 600, and the fifth air port 720 is located at the side of the radiator 500. The first baffle group 700 and the inner surface of the chassis 100 enclose a third chamber 800, the fourth air port 710 communicates with the first air port 130 and the third chamber 800, and the fifth air port 720 communicates with the third chamber 800 and the first opening 420. The number of the first air openings 130 is at least one, the number of the second air openings 140 is at least one, the number of the third air openings 150 is at least one, the number of the fourth air openings 710 is at least one, and the number of the fifth air openings 720 is at least one. Due to the restriction of the first barrier group 700, the air at the outlet of the second fan 600 flows into the third chamber 800 and the heat exchange passage 410 of the heat exchanger 400 through the fourth air port 710. In one possible implementation, the air at the outlet of the second fan 600 flows through the radiator 500 back to the second air port 140, but not through the third air port 150 to the heat exchanger 400.

The power conversion apparatus 10 shown in fig. 4 and 5 is different from the power conversion apparatus 10 shown in fig. 1 to 3 in that the heat exchanger 400 is disposed on the second barrier group 900, and the heat exchanger 400 and the heat sink 500 are located at different sides of the case 160. The second baffle group 900 serves to guide cool air to the heat exchanger 400 for heat exchange.

As shown in fig. 6 and 7, the air outlet of the second fan 600 is parallel to the substrate 510 of the heat sink 500. The third fan 1100 separately ventilates the heat exchanger 400. The second fan 600 is used to cool the heat sink 500, the second electronic component group 1300, and the third electronic component group 1400. The second fan 600 operates to lower the temperature of the heat sink 500, the second electronic component group 1300, and the third electronic component group 1400. The second fan 600 may be a blower fan or a blower fan, and the control logic for the rotational speed of the second fan 600 may also be different.

Wherein the dashed arrows in fig. 1 indicate the flow direction of the air flow.

In the present application, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A power conversion device, characterized in that it comprises:

The chassis has a first chamber and a second chamber inside, and the chassis has a first air vent, a second air vent and a third air vent communicating with the second chamber.

The first electronic component group is disposed in the first cavity;

A first fan is located within the first cavity;

A heat exchanger is located on one side of the chassis. The heat exchanger has a heat exchange channel, a first opening, a second opening, and a first channel. Both ends of the heat exchange channel are connected to the first chamber. The first opening is connected to the third air outlet and the first channel. The first channel is also connected to the second opening.

A radiator is disposed in the second chamber, and the radiator is used to dissipate heat from the first chamber;

A second fan is located in the second chamber;

The first fan operates to drive air to flow between the first chamber and the heat exchange channel;

The second fan operates to drive air into the second chamber through the first air vent, and out of the chassis through the second air vent and the third air vent.

2. The power conversion device according to claim 1, characterized in that the second chamber is disposed above the first chamber, and the first air outlet and the second air outlet are respectively disposed on the two side walls of the second chamber, and the side wall where the first air outlet is located and the side wall where the third air outlet is located are disposed adjacent to each other;

The heat exchanger is located above the first chamber, and the heat exchanger is located on the side of the second chamber with the third air vent; or

The heat exchanger is located on the side of the first chamber, and the chassis is also provided with a second channel, through which the third air outlet is connected to the heat exchanger.

3. The power conversion device according to claim 1 or 2, characterized in that the heat sink is located between the first air outlet and the second air outlet; and/or

The radiator is located between the first air vent and the first chamber.

4. The power conversion device according to claim 1 or 2, characterized in that it further comprises:

The first baffle assembly is disposed in the second chamber, and the first opening is connected to the first air outlet through the first baffle assembly.

5. The power conversion device according to claim 4, wherein the first baffle group is located above the heat sink;

The first baffle assembly covers at least a portion of the third air vent, or there is a gap between the first baffle assembly and the third air vent.

6. The power conversion device according to claim 2, characterized in that, when the chassis is further provided with the second channel, the second channel is located above the heat exchanger, and the power conversion device further includes:

A third fan is located in the second channel, and the chassis is also provided with an overflow port that is connected to the second channel;

The third fan operates to drive air through the outlet into the second channel.

7. The power conversion device according to claim 1 or 2, characterized in that it further comprises:

A bracket is disposed in the second chamber, and the second fan is disposed in the bracket. The bracket is located between the first air outlet and the radiator.

8. The power conversion device according to claim 1 or 2, characterized in that it further comprises:

A second electronic component assembly is disposed in the second chamber, and the second electronic component assembly is located between the heat sink and the second air vent; and/or

A third electronic component group is disposed in the second chamber, and the third electronic component group is located on the side of the heat sink away from the second air vent.

9. The power conversion device according to claim 1 or 2, characterized in that, when a portion of the first electronic component group is disposed opposite to the heat sink, the number of the first fans is two, and another portion of the first electronic component group is located between the two first fans.

10. The power conversion device according to claim 1 or 2, characterized in that it further comprises:

A flow guide is disposed in the first chamber, and the flow guide is connected between the first fan and the heat exchange channel.

11. A photovoltaic system, characterized in that it comprises:

The power conversion device as described in any one of claims 1 to 10.