Power conversion device and photovoltaic system

Abstract

The utility model provides a power conversion device and a photovoltaic system. The power conversion equipment comprises a machine case, a first cavity and a second cavity are formed in the machine case, and a first air opening, a second air opening and a third air opening are formed in the machine case; the first electronic component group is arranged in the first cavity; the first fan is arranged in the first cavity; the heat exchanger is arranged on one side of the case and provided with a heat exchange channel, a first opening, a second opening and a first channel, the two ends of the heat exchange channel communicate with the first cavity, the first opening communicates with the third air opening and the first channel, and the first channel further communicates with the second opening; the radiator is arranged in the second cavity; the second fan is arranged in the second chamber; the first fan works to drive air to flow between the first cavity and the heat exchange channel; the second fan works to drive air to enter the second cavity through the first air opening and flow out of the case through the second air opening and the third air opening. The temperature in the first cavity can be reduced, the use performance of the whole machine is improved, and the service life of the whole machine is prolonged.

Description

Technical Field

[0001] This application relates to the field of power conversion equipment technology, and more specifically, to a power conversion device and a photovoltaic system. Background Technology

[0002] In the new energy industry, power conversion equipment is an indispensable key infrastructure. It is used to convert electrical energy generated by clean photovoltaic or energy storage batteries into power that meets the needs of the power grid. In related technologies, all electronic components of the power conversion equipment are installed in a sealed enclosure, with a heat sink on the outside of the enclosure to dissipate heat from the electronic components inside.

[0003] As the integration of power conversion equipment increases, the volumetric power density becomes higher, leading to higher temperatures within the sealed enclosure. These high ambient temperatures pose a significant challenge to the reliability of the electronic components housed within the enclosure. Relying solely on heat sinks for cooling the electronic components results in poor heat dissipation, further increasing the enclosure temperature and severely impacting the lifespan of the electronic components. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the first aspect of this application proposes a power conversion device.

[0006] The second aspect of this application proposes a photovoltaic system.

[0007] In view of the above, the first aspect of this application proposes a power conversion device, comprising: a chassis, wherein a first chamber and a second chamber are provided inside the chassis, and a first air vent, a second air vent, and a third air vent communicating with the second chamber are provided on the chassis; a first electronic component group is disposed in the first chamber; a first fan is disposed in the first chamber; a heat exchanger is disposed on one side of the chassis, the heat exchanger is provided with 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 vent and the first channel, and the first channel is also connected to the second opening; a radiator is disposed in the second chamber, the radiator is used to dissipate heat from the first chamber; and a second fan is disposed 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 to enter the second chamber through the first air vent and to flow out of the chassis through the second air vent and the third air vent.

[0008] The power conversion device provided in this application includes a chassis, a first electronic component group, a first fan, a heat exchanger, a radiator, and a second fan.

[0009] The chassis has a first chamber and a second chamber, and a first air vent, a second air vent, and a third air vent on the chassis. A first electronic component group and a first fan are both located in the first chamber, while a heat sink and a second fan are both located in the second chamber. The first chamber serves to house and secure the first electronic component and the first fan, while the second chamber serves to house and secure the heat sink and the second fan.

[0010] The heat exchanger is located on one side of the chassis, meaning it is independent of the chassis and situated on its outer side. The heat exchanger has heat exchange channels. Both ends of these channels communicate with the first chamber. Thus, when the first fan operates, it drives air to flow between the first chamber and the heat exchange channels, allowing air to circulate back and forth within these channels. This achieves internal cooling of the first chamber and, consequently, cooling of the first electronic component assembly.

[0011] The heat sink is located in the second chamber and can dissipate heat from the first chamber, thereby achieving the purpose of external heat dissipation from the first chamber and thus heat dissipation from the first electronic component group.

[0012] Understandably, the second chamber connects the first, second, and third air vents. The heat exchanger also has a first opening, a second opening, and a first channel. The first opening connects the third air vent and the first channel, and the first channel also connects to the second opening. The radiator located in the second chamber indirectly contacts the hot air in the first chamber for heat conduction, and the heat from the hot air in the first chamber is transferred to the radiator. The second fan drives cool air from the outside environment into the second chamber through the first air vent. Part of the cool air flows through the radiator and out of the chassis through the second air vent. As the cool air flows through the radiator, it carries away the heat from the radiator, thus cooling it. The air in the second chamber, after being heated by heat exchange, is discharged from the chassis through the second air vent, thereby achieving the purpose of the radiator dissipating heat from the first chamber. Another part of the cool air flows into the first channel through the third air vent. The cool air in the first channel is heated by convection heat exchange with the heat exchange channel and then flows out of the heat exchanger through the second opening, thereby achieving the purpose of dissipating heat from the heat exchange channel and ultimately dissipating heat from the first chamber.

[0013] Therefore, this application demonstrates a reasonable structural design for the power conversion device, enabling both internal and external heat dissipation of the first chamber. In other words, a combination of multiple methods is used to repeatedly dissipate heat from the first electronic component group within the first chamber. This effectively improves the heat dissipation of the first electronic component group, achieving rapid heat dissipation and providing structural support to ensure its lifespan. It also reduces the temperature within the first chamber, thereby enhancing the overall performance and lifespan of the device.

[0014] Meanwhile, the operation of the second fan can drive air into the second chamber through the first air vent, and out of the chassis through the second and third air vents. In other words, the operation of the second fan can not only drive air to remove heat from the radiator, but also remove heat from the heat exchange channel. This means that the airflow path in the power conversion equipment is reasonably limited, so that the second fan is used for both radiator cooling and heat exchanger cooling. While ensuring the heat dissipation effect of the power conversion equipment, the number of fans can be reduced, which is conducive to reducing the production cost of the power conversion equipment.

[0015] The power conversion device of this application can be a string inverter, which takes as input the DC power generated by the photovoltaic panel under sunlight and converts it into AC power of a certain frequency and voltage for output as part of the green energy grid connection. The power conversion device of this application can also be a PCS (Power Conversion System, energy storage converter), connecting the load, the grid, the battery pack, and the photovoltaic panel to meet more power demand needs. The power conversion device of this application includes, but is not limited to, the following functions: first, converting the DC power generated by the photovoltaic panel into DC power to charge the battery pack, or converting the DC power generated by the photovoltaic panel into AC power to the grid and / or the load; second, converting the AC power from the grid and / or the DC power from the photovoltaic panel into DC power to charge the battery and / or AC power to supply the load; third, when the battery pack discharges, the power conversion device converts the discharging DC power into AC power to the grid and / or the load.

[0016] In some technical solutions, optionally, the second chamber is located above the first chamber, and the two side walls of the second chamber are respectively provided with a first air outlet and a second air outlet, and the side wall where the first air outlet is located and the side wall where the third air outlet is located are arranged 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 outlet; 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.

[0017] In this technical solution, the positional relationship between the first chamber and the second chamber is defined. The second chamber is located above the first chamber, and a first air vent and a second air vent are respectively provided on the two side walls of the second chamber. The side walls where the first air vent is located are different from the side walls where the second air vent is located, and the side wall where the first air vent is located is adjacent to the side wall where the third air vent is located.

[0018] For example, the sidewall where the first air vent is located and the sidewall where the second air vent is located are arranged opposite each other.

[0019] For example, the sidewall where the first air vent is located and the sidewall where the second air vent is located are arranged adjacent to each other.

[0020] When the sidewall where the first air outlet is located is set opposite to the sidewall where the second air outlet is located, and the sidewall where the first air outlet is located and the sidewall where the third air outlet is located are set adjacent to each other, this arrangement allows a portion of the air entering the second chamber through the first air outlet to flow to the third air outlet, ensuring the amount of air flowing through the first channel of the heat exchanger and providing structural support for ensuring the heat exchange efficiency of the heat exchanger.

[0021] The heat exchanger is located above the first chamber and on the side of the second chamber with the third air vent. That is, the heat exchanger, the second chamber, and the components in the second chamber are concentrated on one side of the first chamber, which helps to reduce the assembly difficulty of the power conversion equipment and improve the assembly efficiency of the power conversion equipment.

[0022] The heat exchanger is located on the side of the first chamber. The chassis also has a second channel, through which the third air outlet connects to the heat exchanger. In other words, the second channel of the chassis serves to connect the third air outlet and the heat exchanger. The second chamber and the heat exchanger are located on adjacent sides of the first chamber. This arrangement helps reduce airflow detours between the first chamber and the heat exchanger, minimizing airflow losses and allowing more energy to be converted into dynamic pressure, thus improving airflow and the heat exchanger's heat transfer capacity.

[0023] In some technical solutions, the radiator is optionally located between the first air vent and the second air vent.

[0024] In this technical solution, the positional relationship between the radiator, the first air vent, and the second air vent is further defined, so that the radiator is located at the first air vent and the second air vent. This arrangement is conducive to increasing the contact area between the cold air flowing into the second chamber through the first air vent and the radiator, which is conducive to increasing the contact frequency between the cold air flowing into the second chamber through the first air vent and the radiator, which is conducive to improving the heat dissipation efficiency of the radiator, and provides structural support for effectively reducing the temperature of the first chamber.

[0025] In some technical solutions, the radiator is optionally located between the first air vent and the first chamber.

[0026] In this technical solution, the positional relationship between the radiator, the first air vent, and the first chamber is defined, so that the radiator is located between the first air vent and the first chamber. That is, along the direction from the second chamber to the first chamber, the first air vent is located above the radiator. The air entering the second chamber through the first air vent can effectively contact the radiator, which helps to increase the contact area between the cold air flowing into the second chamber through the first air vent and the radiator, which helps to increase the contact frequency between the cold air flowing into the second chamber through the first air vent and the radiator, which helps to improve the heat dissipation efficiency of the radiator, and provides structural support for effectively reducing the temperature of the first chamber.

[0027] In some technical solutions, optionally, the radiator is located between the first air vent and the second air vent, and the radiator is located between the first air vent and the first chamber.

[0028] In this technical solution, the positional relationship between the radiator, the first air vent, and the first chamber is defined, such that the radiator is located between the first air vent and the second air vent, and also between the first air vent and the first chamber. It can be understood that there are multiple first air vents, with some located on the side of the radiator away from the second air vent, and others located on the side of the radiator away from the first chamber. This arrangement increases the area and number of first air vent locations, which helps to increase the frequency of contact between the cold air flowing into the second chamber through the first air vent and the radiator, thereby improving the radiator's heat dissipation efficiency and providing structural support for effectively reducing the temperature of the first chamber.

[0029] In some technical solutions, the first opening and the second opening may optionally be arranged opposite each other.

[0030] In this technical solution, the positional relationship between the first opening and the second opening is further defined, such that the first opening and the second opening are arranged opposite each other, and the first channel connecting the first opening and the second opening is arranged in a strip shape, or the first channel connecting the first opening and the second opening is arranged in a curved shape. This arrangement defines the air flow path in the heat exchanger, which helps to reduce the detour of the air when it flows through the first channel, helps to reduce the air flow loss, allows more energy to be converted into dynamic pressure, and helps to improve the air volume and the heat exchange capacity of the heat exchanger.

[0031] In some technical solutions, the power conversion device may optionally include: a first baffle group disposed in the second chamber, and the first opening being connected to the first air outlet through the first baffle group.

[0032] In this technical solution, the structure of the power conversion device is further defined, such that the power conversion device also includes a first baffle group.

[0033] The first baffle assembly is located in the second chamber, which serves as the mounting carrier for the first baffle assembly, and is used to install and fix the first baffle assembly. The first opening is connected to the first air outlet through the first baffle assembly. In this way, when the second fan is working, it can drive air to flow into the second chamber through the first air outlet, and a portion of the air flows through the first baffle assembly to the first air outlet, and then flows out of the heat exchanger through the first air duct and the second opening in sequence.

[0034] Understandably, the first baffle group is used to supply cold air to the first channel of the heat exchanger separately. This facilitates the distribution of air flowing into the second chamber through the first air outlet, so that part of the air flows to the second air outlet through the radiator, and the other part of the air flows to the first channel of the heat exchanger through the first baffle group, providing structural support to ensure the heat dissipation effect of the radiator and the heat exchange effect of the heat exchanger.

[0035] In some technical solutions, optionally, the first baffle group is located above the radiator; the first baffle group covers at least a portion of the third air vent, or there is a gap between the first baffle group and the third air vent.

[0036] In this technical solution, the cooperative structure of the first baffle group and the third air outlet is defined.

[0037] Specifically, along the direction from the second chamber to the first chamber, the first baffle assembly is located above the radiator, and the first baffle assembly covers at least a portion of the third air vent. When the first baffle assembly completely covers the third air vent, it blocks the airflow path from the third air vent to the first opening of the heat exchanger. That is, air flows into the second chamber through the first air vent, a portion of the air flows to the second air vent through the radiator, and the remaining portion of the air can only flow to the first channel of the heat exchanger through the first baffle assembly and the first opening. When the first baffle assembly covers a portion of the third air vent, air flows into the second chamber through the first air vent, a first portion of the air flows to the second air vent through the radiator, a second portion of the air flows to the first channel of the heat exchanger through the first baffle assembly, and a third portion of the air flows to the first channel of the heat exchanger through the third air vent. This arrangement allows air to flow into the first channel of the heat exchanger from multiple locations, ensuring the amount of air flowing into the first channel of the heat exchanger and providing structural support for ensuring the heat exchange effect of the heat exchanger.

[0038] Specifically, along the direction from the second chamber to the first chamber, the first baffle group is located above the radiator. There is a gap between the first baffle group and the third air outlet. The first baffle group will not block the third air outlet. Some air in the second chamber can still flow to the first opening of the heat exchanger through the third air outlet. That is, air flows into the second chamber through the first air outlet, the first part of the air flows to the second air outlet through the radiator, the second part of the air flows to the first channel of the heat exchanger through the first baffle group and the third air outlet, and the third part of the air flows to the first channel of the heat exchanger through the third air outlet. This arrangement allows air to flow into the first channel of the heat exchanger from multiple locations, which can ensure the amount of air flowing into the first channel of the heat exchanger and provide structural support for ensuring the heat exchange effect of the heat exchanger.

[0039] In some technical solutions, optionally, when the chassis is also provided with a second channel, the second channel is located above the heat exchanger, and the power conversion device also includes: a third fan, provided in the second channel, and the chassis is also provided with an outlet, the outlet being connected to the second channel; the third fan operates to drive air through the outlet into the second channel.

[0040] This technical solution further defines the structure of the power conversion device. The power conversion device also includes a third fan. The third fan is located in the second channel, and the chassis also has an outlet connected to the second channel. It can be understood that when the third fan is operating, air from the external environment can enter the second channel through the outlet and flow to the first channel. In other words, the second channel has an outlet connected to the external environment, and the second channel is also connected to the second chamber through a first opening. This increases the amount of air entering the second channel per unit time, improves the heat exchanger's efficiency, and further enhances the heat dissipation effect of the power conversion device.

[0041] For example, along the direction from the second chamber to the first chamber, the second channel is located above the heat exchanger, and the third air outlet is located on the side of the second channel. This arrangement defines the mating structure of the second channel and the heat exchanger, and defines the flow path of the airflow in the second chamber and the second channel.

[0042] In some technical solutions, the power conversion device may optionally include: a bracket disposed in the second chamber, a second fan disposed in the bracket, and the bracket being located between the first air outlet and the radiator.

[0043] In this technical solution, the structure of the power conversion device is further defined.

[0044] The power conversion device also includes a bracket, which is located in the second chamber. The second chamber serves as the mounting carrier for the bracket and has the function of installing and fixing the bracket. The second fan is located on the bracket, which supports and fixes the second fan and can indirectly define the positional relationship between the first air vent, the second air vent, the heat sink, and the second fan.

[0045] When the radiator is located between the first air vent and the second air vent, the support bracket is located between the first air vent and the radiator. That is, the first air vent, the second fan, the radiator, and the second air vent are arranged in sequence. The first air vent and the second air vent are matched with the second fan. Specifically, the air inlet side of the second fan is opposite to the first air vent, and the air outlet side of the second fan is opposite to the second air vent. This arrangement allows ambient air to be effectively drawn into the second chamber to provide structural support when the second fan is working.

[0046] When the radiator is located between the first air vent and the first chamber, the support bracket is located between the first air vent and the radiator. That is, the first air vent, the second fan, the radiator, and the first chamber are arranged in sequence. The position of the first air vent matches that of the second fan. Specifically, the air inlet side of the second fan is positioned opposite the first air vent, and the air outlet side of the second fan is positioned opposite the radiator. This arrangement ensures that ambient air can be effectively drawn into the second chamber to provide structural support when the second fan is operating.

[0047] In some technical solutions, the power conversion device may optionally include: a second electronic component group disposed in the second chamber, the second electronic component group being located between the heat sink and the second air outlet; and / or a third electronic component group disposed in the second chamber, the third electronic component group being located on the side of the heat sink away from the second air outlet.

[0048] In this technical solution, the structure of the power conversion device is further defined.

[0049] When the power conversion device also includes a second electronic component group, the second electronic component group is located in the second chamber, between the heat sink and the second air vent. When the second fan is working, the cold air flowing into the second chamber through the first air vent will first flow through the second electronic component group when it flows to the second air vent, which can achieve the purpose of heat dissipation for the second electronic component group, reduce the temperature at the second electronic component group, and ensure the service life of the second electronic component group. In other words, this setting reasonably sets the position of the second electronic component group, and can effectively dissipate heat from the second electronic component group using the second fan without adding other heat dissipation devices, which is conducive to reducing the production cost of the power conversion device.

[0050] When the power conversion equipment also includes a third electronic component group, the third electronic component group is located in the second chamber. The third electronic component group is located on the side of the heat sink away from the second air vent. When the second fan is working, part of the cold air flowing into the second chamber through the first air vent will flow through the third electronic component group, which can achieve the purpose of heat dissipation for the third electronic component group, reduce the temperature at the third electronic component group, and ensure the service life of the third electronic component group. In other words, this setting reasonably sets the position of the third electronic component group. Without adding other heat dissipation devices, the second fan can effectively dissipate heat from the third electronic component group, which is conducive to reducing the production cost of the power conversion equipment.

[0051] In some technical solutions, optionally, when a portion of the first electronic component group is positioned opposite the heat sink, the number of first fans is two, and another portion of the first electronic component group is located between the two first fans.

[0052] In this technical solution, the placement of the first electronic component group is further defined.

[0053] There are two first fans. When one part of the first electronic component group is positioned opposite the heat sink, the other part of the first electronic component group is located between the two first fans. This arrangement provides structural support for the reciprocating airflow between the first chamber and the heat exchange channel, effectively reducing the temperature at the first electronic component group and ensuring its service life.

[0054] In some technical solutions, the power conversion device may optionally include: a flow guide, disposed in the first chamber, the flow guide being connected between the first fan and the heat exchange channel.

[0055] This technical solution defines the structure of the power conversion device.

[0056] The power conversion device also includes a flow guide, which is located in the first chamber and connected between the first fan and the heat exchange channel. The flow guide has the function of guiding the flow and can limit the flow path of the airflow between the first chamber and the heat exchange channel, thus providing structural support to ensure the flow of air between the first chamber and the heat exchange channel.

[0057] The second aspect of this application proposes a photovoltaic system comprising: a power conversion device as described in the first aspect.

[0058] The photovoltaic system provided in this application includes the power conversion device as described in the first aspect, and therefore has all the beneficial effects of the aforementioned power conversion device, which will not be described in detail here.

[0059] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0060] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0061] Figure 1 A partial structural schematic diagram of the power conversion device according to the first embodiment of this application is shown;

[0062] Figure 2 A schematic diagram of the first part of the power conversion device according to the second embodiment of this application is shown;

[0063] Figure 3 A schematic diagram of the second part of the power conversion device according to the second embodiment of this application is shown;

[0064] Figure 4 A schematic diagram of the first part of the power conversion device according to the third embodiment of this application is shown;

[0065] Figure 5 A schematic diagram of the second part of the power conversion device according to the third embodiment of this application is shown;

[0066] Figure 6 A partial structural schematic diagram of a power conversion device according to a fourth embodiment of this application is shown;

[0067] Figure 7 A schematic diagram of the power conversion device according to the fourth embodiment of this application is shown;

[0068] Figure 8 A schematic diagram of the structure of a heat exchanger according to an embodiment of this application is shown.

[0069] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0070] 10 Power conversion equipment, 100 Chassis, 110 First chamber, 120 Second chamber, 130 First air outlet, 140 Second air outlet, 150 Third air outlet, 160 Enclosure, 162 Back panel, 170 Third baffle assembly, 200 First electronic component assembly, 300 First fan, 400 Heat exchanger, 410 Heat exchange channel, 420 First opening, 430 Second opening, 440 First channel, 450 First air collector shell, 460 Second air collector shell, 470 Heat exchanger body, 472 heat exchanger tube assembly, 474 second fin, 500 radiator, 510 base plate, 520 first fin, 600 second fan, 700 first baffle assembly, 710 fourth air outlet, 720 fifth air outlet, 800 third chamber, 900 second baffle assembly, 910 flow port, 1000 second channel, 1100 third fan, 1200 bracket, 1300 second electronic component assembly, 1400 third electronic component assembly, 1500 air guide. Detailed Implementation

[0071] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0072] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0073] The following reference Figures 1 to 8 This application describes power conversion devices and photovoltaic systems according to some embodiments.

[0074] like Figure 1 , Figure 2, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a power conversion device 10 according to some embodiments of this application includes a chassis 100, a first electronic component group 200, a first fan 300, a heat exchanger 400, a radiator 500, and a second fan 600.

[0075] The chassis 100 has a first chamber 110 and a second chamber 120.

[0076] The chassis 100 is equipped with a first air vent 130, a second air vent 140 and a third air vent 150.

[0077] The second chamber 120 connects to the first air vent 130, the second air vent 140, and the third air vent 150.

[0078] The first electronic component group 200 is located in the first chamber 110.

[0079] The first fan 300 is located inside the first chamber 110.

[0080] The heat exchanger 400 is located on one side of the casing 100.

[0081] The heat exchanger 400 is provided with a heat exchange channel 410, a first opening 420, a second opening 430 and a first channel 440.

[0082] Both ends of the heat exchange channel 410 are connected to the first chamber 110.

[0083] The first opening 420 connects the third air vent 150 and the first channel 440.

[0084] The first channel 440 is also connected to the second opening 430.

[0085] The radiator 500 is located in the second chamber 120 and is used to dissipate heat from the first chamber 110.

[0086] The second fan 600 is located in the second chamber 120.

[0087] The first fan 300 operates to drive air to flow between the first chamber 110 and the heat exchange passage 410.

[0088] The second fan 600 operates to drive air into the second chamber 120 through the first air vent 130, and out of the chassis 100 through the second air vent 140 and the third air vent 150.

[0089] The power conversion device 10 provided in this application includes a chassis 100, a first electronic component group 200, a first fan 300, a heat exchanger 400, a radiator 500, and a second fan 600.

[0090] The chassis 100 has a first chamber 110 and a second chamber 120. The chassis 100 has a first air vent 130, a second air vent 140, and a third air vent 150. A first electronic component group 200 and a first fan 300 are both located in the first chamber 110, while a heat sink 500 and a second fan 600 are both located in the second chamber 120. The first chamber 110 serves to house and secure the first electronic component and the first fan 300, while the second chamber 120 serves to house and secure the heat sink 500 and the second fan 600.

[0091] The heat exchanger 400 is located on one side of the chassis 100, that is, the heat exchanger 400 is set independently of the chassis 100 and is located on the outside of the chassis 100. The heat exchanger 400 is provided with a heat exchange channel 410. Both ends of the heat exchange channel 410 are connected to the first chamber 110. In this way, the operation of the first fan 300 can drive air to flow between the first chamber 110 and the heat exchange channel 410, that is, the air can flow back and forth in the first chamber 110 and the heat exchange channel 410 to achieve the purpose of internal circulation heat dissipation of the first chamber 110, and thus achieve the purpose of heat dissipation of the first electronic component group 200.

[0092] The heat sink 500 is located in the second chamber 120. The heat sink 500 can dissipate heat from the first chamber 110, so as to achieve the purpose of external heat dissipation of the first chamber 110 outside the first chamber 110, and thereby achieve the purpose of heat dissipation of the first electronic component group 200.

[0093] Understandably, the second chamber 120 connects to the first air vent 130, the second air vent 140, and the third air vent 150. The heat exchanger 400 also has a first opening 420, a second opening 430, and a first channel 440. The first opening 420 connects to the third air vent 150 and the first channel 440, and the first channel 440 also connects to the second opening 430. The radiator 500 located in the second chamber 120 indirectly contacts and conducts heat with the hot air in the first chamber 110, and the heat from the hot air in the first chamber 110 is conducted to the radiator 500. The second fan 600 drives cold air from the outside environment into the second chamber 120 through the first air vent 130. Part of the cold air flows through the radiator 500 and out of the chassis 100 through the second air vent 140. When the cold air flows through the radiator 500, it can carry away the heat from the radiator 500 to cool it. After the air in the second chamber 120 is heated by heat exchange, it is discharged from the chassis 100 through the second air vent 140, thereby achieving the purpose of heat dissipation of the first chamber 110 by the radiator 500. Another part of the cold air flows into the first channel 440 through the third air vent 150. The cold air in the first channel 440 is heated into hot air after convective heat exchange with the heat exchange channel 410 and flows out of the heat exchanger 400 through the second opening 430, thereby achieving the purpose of heat dissipation of the heat exchange channel 410 and thus achieving the purpose of heat dissipation of the first chamber 110.

[0094] Therefore, it can be seen that the structure of the power conversion device 10 in this application is reasonably designed so that it can perform both internal circulation heat dissipation and external heat dissipation of the first chamber 110. That is, multiple methods are combined to perform multiple heat dissipation on the first electronic component group 200 in the first chamber 110. This can effectively improve the heat dissipation effect of the first electronic component group 200 in the first chamber 110, achieve the purpose of rapid heat dissipation of the first electronic component group 200, provide structural support for ensuring the service life of the first electronic component group 200, reduce the temperature in the first chamber 110, and improve the overall performance and service life of the device.

[0095] Meanwhile, the operation of the second fan 600 can drive air into the second chamber 120 through the first air vent 130, and out of the chassis 100 through the second air vent 140 and the third air vent 150. That is, the operation of the second fan 600 can not only drive air to remove the heat from the radiator 500, but also remove the heat from the heat exchange channel 410. In other words, the air flow path in the power conversion device 10 is reasonably limited, so that the second fan 600 is used for both cooling the radiator 500 and cooling the heat exchanger 400. While ensuring the heat dissipation effect of the power conversion device 10, the number of fans can be reduced, which is conducive to reducing the production cost of the power conversion device 10.

[0096] The power conversion device 10 of this application can be a string inverter, which takes in the direct current (DC) generated by the photovoltaic panel under sunlight and converts it into alternating current (AC) at a certain frequency and voltage for output, as part of the green energy grid connection. The power conversion device 10 of this application can also be a PCS (Power Conversion System), connecting the load, the power grid, the battery pack, and the photovoltaic panel to meet more power demand needs. The power conversion device 10 of this application includes, but is not limited to, the following functions: first, converting the DC generated by the photovoltaic panel into DC power to charge the battery pack, or converting the DC generated by the photovoltaic panel into AC power to the power grid and / or the load; second, converting the AC power from the power grid and / or the DC power from the photovoltaic panel into DC power to charge the battery and / or AC power to supply the load; and third, when the battery pack discharges, the power conversion device 10 converts the discharging DC power into AC power to the power grid and / or the load.

[0097] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the radiator 500 is located between the first air outlet 130 and the second air outlet 140.

[0098] In this embodiment, the positional relationship between the radiator 500, the first air vent 130, and the second air vent 140 is further defined, such that the radiator 500 is located at the first air vent 130 and the second air vent 140. This arrangement is beneficial to increasing the contact area between the cold air flowing into the second chamber 120 through the first air vent 130 and the radiator 500, which is beneficial to increasing the contact frequency between the cold air flowing into the second chamber 120 through the first air vent 130 and the radiator 500, and is beneficial to improving the heat dissipation efficiency of the radiator 500, thus providing structural support for effectively reducing the temperature of the first chamber 110.

[0099] In some other embodiments, the first air vent 130 and the second air vent 140 are located on adjacent sides of the chassis 100.

[0100] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the radiator 500 is located between the first air outlet 130 and the first chamber 110.

[0101] In this embodiment, the positional relationship between the radiator 500, the first air vent 130, and the first chamber 110 is defined such that the radiator 500 is located between the first air vent 130 and the first chamber 110. That is, along the direction from the second chamber 120 to the first chamber 110, the first air vent 130 is located above the radiator 500. The air entering the second chamber 120 through the first air vent 130 can effectively contact the radiator 500, which helps to increase the contact area between the cold air flowing into the second chamber 120 through the first air vent 130 and the radiator 500, and helps to increase the contact frequency between the cold air flowing into the second chamber 120 through the first air vent 130 and the radiator 500, thereby improving the heat dissipation efficiency of the radiator 500 and providing structural support for effectively reducing the temperature of the first chamber 110.

[0102] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the radiator 500 is located between the first air outlet 130 and the second air outlet 140, and the radiator 500 is located between the first air outlet 130 and the first chamber 110.

[0103] In this embodiment, the positional relationship between the radiator 500, the first air vent 130, and the first chamber 110 is defined such that the radiator 500 is located between the first air vent 130 and the second air vent 140, and also between the first air vent 130 and the first chamber 110. It is understood that there are multiple first air vents 130, with some located on the side of the radiator 500 away from the second air vent 140, and others located on the side of the radiator 500 away from the first chamber 110. This arrangement increases the area and number of first air vents 130, which helps to increase the frequency of contact between the cold air flowing into the second chamber 120 through the first air vents 130 and the radiator 500, thereby improving the heat dissipation efficiency of the radiator 500 and providing structural support for effectively reducing the temperature of the first chamber 110.

[0104] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the first opening 420 and the second opening 430 are arranged opposite to each other.

[0105] In this embodiment, the positional relationship between the first opening 420 and the second opening 430 is further defined, such that the first opening 420 and the second opening 430 are arranged opposite to each other, and the first channel 440 connecting the first opening 420 and the second opening 430 is arranged in a strip shape, or the first channel 440 connecting the first opening 420 and the second opening 430 is arranged in a curved shape. This arrangement defines the air flow path in the heat exchanger 400, which helps to reduce the detours when the air flows through the first channel 440, helps to reduce the air flow loss, allows more energy to be converted into dynamic pressure, and helps to improve the air volume and the heat exchange capacity of the heat exchanger 400.

[0106] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the first air outlet 130 and the third air outlet 150 are located on adjacent sides of the chassis 100.

[0107] In this embodiment, the positional relationship between the first air vent 130 and the third air vent 150 is further defined, such that the first air vent 130 and the third air vent 150 are located on adjacent sides of the chassis 100. That is, the first air vent 130 and the second air vent 140 are located on opposite sides of the chassis 100, and the first air vent 130 and the third air vent 150 are located on adjacent sides of the chassis 100. This arrangement allows a portion of the air entering the second chamber 120 through the first air vent 130 to flow to the third air vent 150, ensuring the amount of air flowing through the first channel 440 of the heat exchanger 400, and providing structural support for ensuring the heat exchange efficiency of the heat exchanger 400.

[0108] In some other embodiments, when the heat sink 500 is located between the first air vent 130 and the second air vent 140, the third air vent 150 and the second air vent 140 are located on the same side of the chassis 100.

[0109] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 2 , Figure 3 and Figure 4 As shown, the power conversion device 10 also includes a first baffle group 700.

[0110] The first baffle assembly 700 is located inside the second chamber 120.

[0111] The third chamber 800 is enclosed by the inner surfaces of the first baffle group 700 and the chassis 100.

[0112] The first baffle assembly 700 is equipped with a fourth air vent 710 and a fifth air vent 720.

[0113] The fourth air vent 710 connects the first air vent 130 and the third chamber 800.

[0114] The fifth air vent 720 connects the third chamber 800 and the first opening 420.

[0115] In this embodiment, the structure of the power conversion device 10 is further defined such that the power conversion device 10 also includes a first baffle group 700.

[0116] The first baffle assembly 700 is disposed within the second chamber 120, which serves as the mounting carrier for the first baffle assembly 700, and has the function of installing and fixing the first baffle assembly 700. The first baffle assembly 700 and the inner surface of the chassis 100 enclose a third chamber 800. The first baffle assembly 700 is provided with a fourth air vent 710 and a fifth air vent 720, and the third chamber 800 connects the fourth air vent 710 and the fifth air vent 720. The fourth air vent 710 is also connected to the first air vent 130, and the fifth air vent 720 is also connected to the first opening 420.

[0117] In this way, the operation of the second fan 600 can drive air to flow into the second chamber 120 through the first air outlet 130, and a portion of the air flows to the third chamber 800 through the fourth air outlet 710, flows to the first air outlet 130 through the fifth air outlet 720, and flows out of the heat exchanger 400 in sequence through the first air duct and the second opening 430.

[0118] Understandably, the third chamber 800 is a hollow structure, used solely to supply cold air to the first channel 440 of the heat exchanger 400. This facilitates the distribution of air flowing into the second chamber 120 through the first air vent 130, allowing some air to flow through the radiator 500 to the second air vent 140, and another portion to flow through the third chamber 800 to the first channel 440 of the heat exchanger 400. This provides structural support to ensure the heat dissipation effect of the radiator 500 and the heat exchange effect of the heat exchanger 400.

[0119] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: along the direction from the second chamber 120 to the first chamber 110, the first baffle group 700 is located above the radiator 500.

[0120] The first baffle assembly 700 covers at least a portion of the third air vent 150, or there is a gap between the first baffle assembly 700 and the third air vent 150.

[0121] In this embodiment, the cooperative structure of the first baffle assembly 700 and the third air outlet 150 is defined.

[0122] Specifically, along the direction from the second chamber 120 to the first chamber 110, the first baffle assembly 700 is located above the radiator 500, and the first baffle assembly 700 covers at least a portion of the third air vent 150. When the first baffle assembly 700 completely covers the third air vent 150, the first baffle assembly 700 blocks the airflow path from the third air vent 150 to the first opening 420 of the heat exchanger 400. That is, air flows into the second chamber 120 through the first air vent 130, a portion of the air flows to the second air vent 140 through the radiator 500, and the other portion of the air can only flow to the first channel 440 of the heat exchanger 400 through the fourth air vent 710, the third chamber 800, the fifth air vent 720, and the first opening 420. When the first baffle assembly 700 covers part of the third air vent 150, air flows into the second chamber 120 through the first air vent 130. The first part of the air flows to the second air vent 140 through the radiator 500. The second part of the air flows to the first channel 440 of the heat exchanger 400 through the fourth air vent 710, the third chamber 800, the fifth air vent 720, and the third air vent 150. The third part of the air flows to the first channel 440 of the heat exchanger 400 through the third air vent 150. This arrangement allows air to flow into the first channel 440 of the heat exchanger 400 from multiple locations, ensuring the amount of air flowing into the first channel 440 of the heat exchanger 400 and providing structural support for ensuring the heat exchange effect of the heat exchanger 400.

[0123] Specifically, along the direction from the second chamber 120 to the first chamber 110, the first baffle assembly 700 is located above the radiator 500. There is a gap between the first baffle assembly 700 and the third air vent 150, ensuring that the first baffle assembly 700 does not block the third air vent 150. Some air in the second chamber 120 can still flow through the third air vent 150 to the first opening 420 of the heat exchanger 400. That is, air flows into the second chamber 120 through the first air vent 130, and a portion of the air flows through the radiator 500 to the second air vent 420. The second part of the air flows through the fourth air outlet 710, the third chamber 800, the fifth air outlet 720 and the third air outlet 150 to the first channel 440 of the heat exchanger 400, and the third part of the air flows through the third air outlet 150 to the first channel 440 of the heat exchanger 400. This arrangement allows air to flow into the first channel 440 of the heat exchanger 400 from multiple locations, ensuring the amount of air flowing into the first channel 440 of the heat exchanger 400 and providing structural support for ensuring the heat exchange effect of the heat exchanger 400.

[0124] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 4 and Figure 6 As shown, the power conversion device 10 also includes a second baffle group 900.

[0125] The second baffle assembly 900 is located on one side of the chassis 100.

[0126] The second baffle assembly 900 and the outer surface of the chassis 100 enclose the second channel 1000.

[0127] The first opening 420 connects to the third air vent 150 via the second channel 1000.

[0128] In this embodiment, the structure of the power conversion device 10 is further defined.

[0129] The power conversion device 10 also includes a second baffle assembly 900, which is located on one side of the chassis 100. The second baffle assembly 900 and the outer surface of the chassis 100 enclose a second channel 1000, which connects to a first opening 420 and also connects to a third air vent 150. That is, the first opening 420 connects to the third air vent 150 through the second channel 1000. Air flows into the second channel 1000 through the third air vent 150, flows through the second channel 1000 to the first opening 420, flows through the first opening 420 to the first channel 440, and flows out of the heat exchanger 400 through the second opening 430.

[0130] The second channel 1000 defines the flow path of air from the third vent 150 to the first opening 420. The channel wall of the second channel 1000 has a diffuser effect, allowing the airflow velocity entering through the third vent 150 to be relatively high. Passing through the second channel 1000 reduces airflow deflection and flow loss, converting more energy into dynamic pressure and thus increasing airflow volume. Simultaneously, the second channel has a flow-gathering function, reducing the frequency of airflow separation, flow breakdown, and vortices, which helps reduce the operating noise of the power conversion device 10 and improves its performance.

[0131] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 6 and Figure 7 As shown, the power conversion device 10 also includes a third fan 1100.

[0132] The third fan 1100 is located in the second channel 1000.

[0133] The second baffle assembly 900 is provided with an outlet 910.

[0134] The flow port 910 connects to the second channel 1000.

[0135] The third fan 1100 operates to drive air through the outlet 910 into the second channel 1000.

[0136] In this embodiment, the structure of the power conversion device 10 is further defined. The power conversion device 10 also includes a third fan 1100. The third fan 1100 is disposed in the second channel 1000, and the second baffle assembly 900 is provided with an outlet 910, which is connected to the second channel 1000. It can be understood that when the third fan 1100 is working, air from the external environment can enter the second channel 1000 through the outlet 910 and flow to the first channel 440 through the second channel 1000. That is to say, the second channel 1000 has an outlet 910 that is connected to the external environment, and the second channel 1000 is also connected to the second chamber 120 through the first opening 420. This is beneficial to increasing the amount of air entering the second channel 1000 per unit time, which is beneficial to improving the heat exchange efficiency of the heat exchanger 400, and thus further improving the heat dissipation effect of the power conversion device 10.

[0137] For example, along the direction from the second chamber 120 to the first chamber 110, the second channel 1000 is located above the heat exchanger 400, and the third air outlet 150 is located on the side of the second channel 1000. This arrangement defines the mating structure of the second channel 1000 and the heat exchanger 400, and defines the flow path of the airflow in the second chamber 120 and the second channel 1000.

[0138] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the power conversion device 10 also includes a bracket 1200.

[0139] The support 1200 is located in the second chamber 120.

[0140] The second fan 600 is mounted on the bracket 1200.

[0141] The bracket 1200 is located between the first air vent 130 and the radiator 500.

[0142] In this embodiment, the structure of the power conversion device 10 is further defined.

[0143] The power conversion device 10 also includes a bracket 1200, which is disposed in the second chamber 120. The second chamber 120 serves as the mounting carrier for the bracket 1200 and has the function of installing and fixing the bracket 1200. The second fan 600 is disposed in the bracket 1200, which has the function of supporting and fixing the second fan 600 and can indirectly define the positional relationship between the first air outlet 130, the second air outlet 140, the radiator 500, and the second fan 600.

[0144] When the radiator 500 is located between the first air vent 130 and the second air vent 140, the bracket 1200 is located between the first air vent 130 and the radiator 500. That is, the first air vent 130, the second fan 600, the radiator 500, and the second air vent 140 are arranged in sequence. The arrangement of the first air vent 130 and the second air vent 140 matches the second fan 600. Specifically, the air inlet side of the second fan 600 is opposite to the first air vent 130, and the air outlet side of the second fan 600 is opposite to the second air vent 140. This arrangement ensures that when the second fan 600 is working, ambient air can be effectively drawn into the second chamber 120 to provide structural support.

[0145] When the radiator 500 is located between the first air vent 130 and the first chamber 110, the bracket 1200 is located between the first air vent 130 and the radiator 500. That is, the first air vent 130, the second fan 600, the radiator 500, and the first chamber 110 are arranged in sequence. The position of the first air vent 130 matches that of the second fan 600. Specifically, the air inlet side of the second fan 600 is opposite to the first air vent 130, and the air outlet side of the second fan 600 is opposite to the radiator 500. This arrangement ensures that when the second fan 600 is working, ambient air can be effectively drawn into the second chamber 120 to provide structural support.

[0146] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the power conversion device 10 also includes a second electronic component group 1300 and / or a third electronic component group 1400.

[0147] The second electronic component group 1300 is located in the second chamber 120.

[0148] The second electronic component group 1300 is located between the heat sink 500 and the second air vent 140.

[0149] The third electronic component group 1400 is located in the second chamber 120.

[0150] The third electronic component group 1400 is located on the side of the heat sink 500 away from the second air vent 140.

[0151] In this embodiment, the structure of the power conversion device 10 is further defined.

[0152] When the power conversion device 10 also includes a second electronic component group 1300, the second electronic component group 1300 is located in the second chamber 120, between the heat sink 500 and the second air vent 140. When the second fan 600 is working, the cold air flowing into the second chamber 120 through the first air vent 130 will first flow through the second electronic component group 1300 when it flows to the second air vent 140, which can achieve the purpose of heat dissipation for the second electronic component group 1300, reduce the temperature at the second electronic component group 1300, and ensure the service life of the second electronic component group 1300. In other words, this arrangement reasonably sets the position of the second electronic component group 1300, and without adding other heat sinks 500, it can effectively dissipate heat from the second electronic component group 1300 using the second fan 600, which is conducive to reducing the production cost of the power conversion device 10.

[0153] When the power conversion device 10 also includes a third electronic component group 1400, the third electronic component group 1400 is located in the second chamber 120. The third electronic component group 1400 is located on the side of the heat sink 500 away from the second air vent 140. When the second fan 600 is working, part of the cold air flowing into the second chamber 120 through the first air vent 130 will flow through the third electronic component group 1400, which can achieve the purpose of heat dissipation of the third electronic component group 1400, reduce the temperature at the third electronic component group 1400, and ensure the service life of the third electronic component group 1400. In other words, this arrangement reasonably sets the position of the third electronic component group 1400. Without adding other heat sinks 500, the second fan 600 can be used to effectively dissipate heat from the third electronic component group 1400, which is conducive to reducing the production cost of the power conversion device 10.

[0154] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the chassis 100 includes a housing 160 and a third baffle assembly 170.

[0155] The first chamber 110 is located inside the housing 160.

[0156] The enclosure 160 includes a back panel 162.

[0157] The heat exchanger 400 is located on one side of the housing 160.

[0158] The third baffle assembly 170 is located on one side of the housing 160, and the third baffle assembly 170 is connected to the back panel 162.

[0159] The second chamber 120 is enclosed between the outer surfaces of the third baffle assembly 170 and the housing 160.

[0160] The third baffle assembly 170 is provided with a first air vent 130, a second air vent 140 and a third air vent 150.

[0161] At least a portion of the first electronic component group 200 and the heat sink 500 are located on opposite sides of the back plate 162.

[0162] In this embodiment, the chassis 100 includes a housing 160 and a third baffle assembly 170.

[0163] The enclosure 160 has a first chamber 110 and includes a back panel 162. A third baffle assembly 170 is located on one side of the enclosure 160 and is connected to the back panel 162. A second chamber 120 is enclosed between the third baffle assembly 170 and the outer surface of the enclosure 160.

[0164] The third baffle assembly 170 is provided with a first air vent 130, a second air vent 140 and a third air vent 150.

[0165] In other words, the box 160 and the third baffle group 170 enclose the first chamber 110 and the second chamber 120.

[0166] At least a portion of the first electronic component group 200 and the heat sink 500 are located on opposite sides of the back plate 162. This arrangement shortens the distance between the heat sink 500 and the first electronic component group 200, allowing the heat from the first electronic component group 200 to be quickly conducted to the heat sink 500, which is beneficial to improving the heat dissipation efficiency of the heat sink 500.

[0167] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 3 As shown, the heat sink 500 includes a substrate 510 and a plurality of first fins 520.

[0168] The substrate 510 abuts against the back plate 162.

[0169] Multiple first fins 520 are disposed on the side of the substrate 510 away from the housing 160.

[0170] Multiple first fins 520 are arranged at intervals along a first direction.

[0171] The heat exchange channel 410 extends along the second direction, and the first channel 440 extends along the first direction.

[0172] In this embodiment, the structure of the heat sink 500 is defined.

[0173] The heat sink 500 includes a substrate 510 and a plurality of first fins 520. The substrate 510 abuts against a back plate 162, which is located between the substrate 510 and at least a portion of the first electronic component group 200. This arrangement can shorten the distance between the heat sink 500 and the first electronic component group 200, allowing the heat from the first electronic component group 200 to be quickly conducted to the heat sink 500, thereby improving the heat dissipation efficiency of the heat sink 500.

[0174] In addition, multiple first fins 520 are disposed on the side of the substrate 510 away from the housing 160, and the multiple first fins 520 are arranged at intervals along the first direction. By setting multiple first fins 520, the heat dissipation area of ​​the heat sink 500 can be increased, which is beneficial to improving the heat dissipation effect of the heat sink 500.

[0175] It is understandable that an air duct will be formed between two adjacent first fins 520. The first air duct extends along the second direction, the heat exchange channel 410 extends along the second direction, and the first channel 440 extends along the first direction. The first direction is different from the second direction, for example, the first direction is perpendicular to the second direction, or the angle between the first direction and the second direction is an acute angle or an obtuse angle.

[0176] For example, the first air vent 130 and the second air vent 140 are arranged along the second direction, and the extension direction of the air duct formed by the radiator 500 matches the position of the first air vent 130 and the second air vent 140. That is, the extension direction of the air duct formed by the radiator 500 is consistent with the ventilation direction of the second chamber 120. This is beneficial to improving the heat exchange efficiency between the heat sink and the cold air entering the second chamber 120, thereby improving the heat dissipation efficiency of the heat sink to the first chamber 110.

[0177] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: 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, the number of first fans 300 is two, and another part of the first electronic component group 200 is located between the two first fans 300.

[0178] In this embodiment, the placement position of the first electronic component group 200 is further defined.

[0179] There are two first fans 300. When a portion of the first electronic component assembly 200 and the heat sink 500 are located on opposite sides of the backplate 162, another portion of the first electronic component assembly 200 is located between the two first fans 300. This arrangement provides structural support for the reciprocating airflow between the first chamber 110 and the heat exchange channel 410, effectively reducing the temperature at the first electronic component assembly 200 and ensuring the service life of the first electronic component assembly 200.

[0180] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the third baffle group 170 and the heat exchanger 400 are located on the same side of the housing 160; or the third baffle group 170 and the heat exchanger 400 are located on adjacent sides of the housing 160.

[0181] In this embodiment, the positional relationship between the third baffle assembly 170, the heat exchanger 400, and the housing 160 is further defined.

[0182] The third baffle assembly 170 and the heat exchanger 400 are located on the same side of the housing 160. The first baffle assembly 700 and the heat exchanger 400 are concentrated on one side of the housing 160, which helps to reduce the assembly difficulty of the power conversion device 10 and improve the assembly efficiency of the power conversion device 10.

[0183] The third baffle assembly 170 and the heat exchanger 400 are located on adjacent sides of the housing 160. This arrangement helps to reduce the detours of the airflow when it flows between the housing 160 and the heat exchanger 400, which helps to reduce airflow losses, allowing more energy to be converted into dynamic pressure, and helps to improve the air volume and the heat exchange capacity of the heat exchanger 400.

[0184] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 3 and Figure 5 As shown, the power conversion device 10 also includes a flow guide 1500.

[0185] The flow guide 1500 is located in the first chamber 110.

[0186] The air guide 1500 is connected between the first fan 300 and the heat exchange channel 410.

[0187] In this embodiment, the structure of the power conversion device 10 is defined.

[0188] The power conversion device 10 also includes a flow guide 1500, which is disposed in the first chamber 110 and connected between the first fan 300 and the heat exchange channel 410. The flow guide 1500 has the function of guiding the flow and can limit the flow path of the airflow between the first chamber 110 and the heat exchange channel 410, thus providing structural support for ensuring the flow of air between the first chamber 110 and the heat exchange channel 410.

[0189] This embodiment provides a power conversion device 10. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 , Figure 2 and Figure 8As shown, the heat exchanger 400 includes a first air collector shell 450, a second air collector shell 460, and a heat exchange body 470.

[0190] The heat exchanger body 470 is connected between the first air collector shell 450 and the second air collector shell 460.

[0191] The heat exchanger body 470 includes multiple heat exchanger tube assemblies 472 and multiple second fins 474.

[0192] Each heat exchange tube assembly 472 is provided with at least one heat exchange channel 410.

[0193] Each heat exchange channel 410 is connected to the first chamber 110 via the first air collector 450 and the second air collector 460.

[0194] Multiple heat exchange tube groups 472 are arranged at intervals along the direction from the second chamber 120 to the first chamber 110.

[0195] Multiple second fins 474 are provided between two adjacent heat exchange tube groups 472, arranged at intervals along the second direction.

[0196] In two adjacent heat exchange tube groups 472, multiple second fins 474 and the two heat exchange tube groups 472 enclose multiple first channels 440, first openings 420 and second openings 430.

[0197] In this embodiment, the heat exchanger 400 includes a first air collector shell 450, a second air collector shell 460, and a heat exchange body 470.

[0198] The heat exchange body 470 is connected between the first air collector shell 450 and the second air collector shell 460. The first air collector shell 450 is connected to the first chamber 110, and the second air collector shell 460 is also connected to the first chamber 110.

[0199] The heat exchanger body 470 includes multiple heat exchanger tube groups 472, which are spaced apart along the direction from the second chamber 120 to the first chamber 110. Each heat exchanger tube group 472 is provided with at least one heat exchange channel 410, and each heat exchange channel 410 is connected to the first chamber 110 through a first air collector 450 and a second air collector 460. Multiple second fins 474 are provided between any two adjacent heat exchanger tube groups 472, and the multiple second fins 474 are spaced apart along a second direction.

[0200] In two adjacent heat exchange tube groups 472, multiple second fins 474 and the two heat exchange tube groups 472 enclose multiple first channels 440, first openings 420 and second openings 430, and each first channel 440 connects to the first opening 420 and the second opening 430.

[0201] When the heat exchange tube assembly 472 includes multiple heat exchange channels 410, the multiple heat exchange channels 410 are arranged at intervals along the first direction.

[0202] Specifically, when the first fan 300 is working, the air in the first chamber 110 flows through the first air collector 450 to the heat exchange body 470, through the multiple heat exchange channels 410 of the heat exchange body 470 to the second air collector 460, and then flows back to the first chamber 110 through the second air collector 460.

[0203] This configuration allows the heat exchanger 400 to have multiple heat exchange channels 410 and multiple first channels 440, with each heat exchange channel 410 being equipped with multiple first channels 440. This ensures the heat exchange effect of each heat exchange channel 410 and helps to improve the heat exchange efficiency of the heat exchanger 400.

[0204] A photovoltaic system according to some embodiments of this application includes: the power conversion device 10 of any of the above embodiments.

[0205] The photovoltaic system provided in this application includes the power conversion device 10 of any of the above embodiments, and therefore has all the beneficial effects of the power conversion device 10, which will not be described in detail here.

[0206] For example, the first chamber 110 is a closed chamber.

[0207] For example, the power conversion device 10 provided in this application is part of a new energy power grid connection system. The power conversion device 10 in this application includes, but is not limited to, power conversion of photovoltaic power or battery energy storage power.

[0208] For example, the device to be cooled includes a chassis 100, a heat sink 500, and a heat exchanger 400. The device to be cooled includes a first electronic component group 200, a second electronic component group 1300, and a third electronic component group 1400. The chassis 100 includes a housing 160 and a third baffle group 170, wherein the housing 160 is a sealed structure.

[0209] For example, the enclosure 160 is used to install the first electronic component group 200, which includes, but is not limited to, circuit boards with different functions, inverter modules, boost modules, power inductors, capacitors and inductors, etc., which will not be listed here.

[0210] For example, different side panels of the housing 160 have various through holes for electrical connection between the first electronic component group 200 and the second electronic component group 1300 and / or the third electronic component group 1400 located outside the housing 160. Sealing structures are provided at the connection points between the housing 160 and devices such as the heat sink 500, inductors, and connectors located outside the housing 160 to isolate the first chamber 110 from the external environment.

[0211] For example, the heat sink 500 includes a substrate 510 and a plurality of first fins 520, which are spaced apart along a first direction. The substrate 510 is mounted on the back plate 162 of the housing 160, and the substrate 510 conducts heat to the first electronic component group 200 through a thermally conductive material.

[0212] For example, at least one of the second electronic component group 1300 and the third electronic component group 1400 includes an inductor core and a heat sink. The heat sink is provided with fins to increase the heat exchange area. Both the second electronic component group 1300 and the third electronic component group 1400 are located outside the housing 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 of the inlet side and the outlet side of the heat sink 500.

[0213] Exemplarily, the heat exchanger 400 includes a first air collector shell 450, a second air collector shell 460, and a heat exchange body 470. The heat exchanger 400 is a device for exchanging heat between hot air inside a housing 160 and cold air from the external environment. The heat exchanger 400 is located outside the housing 160, and the housing 160 has through holes communicating with the inlet and outlet of the heat exchanger 400. The heat exchange body 470 includes multiple heat exchange tube assemblies 472 and multiple second fins 474. Each heat exchange tube assembly 472 has at least one heat exchange channel 410. The two ends of the heat exchange channel 410 communicate with the first air collector shell 450 and the second air collector shell 460 at both ends of the heat exchange body 470, respectively. The first air collector shell 450 has at least one first connection port for connecting to the corresponding heat exchange channel 410, and at least one second connection port for communicating with the first chamber 110. The second air collector shell 460 is provided with at least one first communication port for connecting to the corresponding heat exchange channel 410. The second air collector shell 460 is also provided with at least one second communication port for connecting to the first chamber 110. Two adjacent heat exchange tube groups 472 and multiple second fins 474 enclose multiple first channels 440, first openings 420 and second openings 430. The heat exchange channel 410 is perpendicular to the first channel 440. The heat exchange channel 410 and the first channel 440 are physically isolated by the heat exchange body 470, the first air collector shell 450 and the second air collector shell 460. When a corresponding fluid medium (e.g., air) flows in both the heat exchange channel 410 and the first channel 440, and there is a temperature difference between the fluid medium in the heat exchange channel 410 and the first channel 440, the heat exchanger 400 can exchange heat between the inside and outside. For example, the heat exchange channel 410 carries a high-temperature fluid medium, while the first channel 440 carries a low-temperature fluid medium. When the heat exchanger 400 is working, the high-temperature fluid medium is cooled down after passing through the heat exchange channel 410, while the fluid medium is heated and its temperature rises after passing through the first channel 440.

[0214] in, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 The arrows in the diagram indicate the direction of airflow.

[0215] like Figure 1 As shown, the heat exchanger 400 is located outside the sealed housing 160, and the heat exchanger 400 and the radiator 500 are located on the same side of the housing 160. The housing 160 has two through holes; one through hole connects to one end of the heat exchange channel 410 of the heat exchanger 400, and the other through hole connects to the other end of the heat exchange channel 410 of the heat exchanger 400. The heat exchanger 400 is located on one side of the radiator 500. A third baffle assembly 170 separates the heat exchanger 400 from the radiator 500. The third baffle assembly 170 has a third air vent 150, which connects to the first channel 440 of the heat exchanger 400. There is at least one third air vent 150. The third air vent 150 is correspondingly arranged with the first channel 440 of the heat exchanger 400, allowing air to flow evenly through the multiple first channels 440 of the heat exchanger 400, thereby improving the heat exchange efficiency of the heat exchanger 400. A second fan 600 is mounted on a bracket 1200 and is located between a third electronic component group 1400 and a heat sink 500. The third electronic component includes an inductor. A second electronic component group 1300 is located between the heat sink 500 and a second air vent 140 and also includes an inductor. Both the first air vent 130 and the second air vent 140 on the third baffle group 170 are in communication with the external environment. When the second fan 600 is operating, on the one hand, the second fan 600 drives air to flow sequentially through the first air vent 130, the third electronic component group 1400, the heat sink 500, the second electronic component group 1300, and the second air vent 140; on the other hand, a portion of the air driven by the second fan 600 turns to flow towards the third air vent 150, and then through the third air vent 150 to the first channel 440. The air in both the second chamber 120 and the first channel 440 is driven by one or more second fans 600. The housing 160 has an internal air guide 1500 that mates with the first air collector 450 of the heat exchanger 400; alternatively, the housing 160 has an internal air guide 1500 that mates with the second air collector 460 of the heat exchanger 400. The air guide 1500 works in conjunction with the first fan 300 to drive air to circulate between the first chamber 110 and the heat exchange channel 410, thereby reducing the temperature within the first chamber 110 and consequently lowering the temperature of the first electronic component assembly 200, thus improving operational reliability. The number of first fans 300 is at least one, the number of second fans 600 is at least one, and the number of third fans 1100 is at least one.

[0216] Figure 2 and Figure 3 The power conversion device 10 shown is Figure 1 Compared to the previous version, the power conversion device 10 has an additional first baffle assembly 700. The first baffle assembly 700 has a fourth air vent 710 and a fifth air vent 720. The fourth air vent 710 is located on the exhaust side of the second fan 600, and the fifth air vent 720 is located on the side of the radiator 500. The first baffle assembly 700 and the inner surface of the chassis 100 enclose a third chamber 800. The fourth air vent 710 connects the first air vent 130 and the third chamber 800, and the fifth air vent 720 connects the third chamber 800 and the first opening 420. There is at least one first air vent 130, at least one second air vent 140, at least one third air vent 150, at least one fourth air vent 710, and at least one fifth air vent 720. This arrangement is more conducive to airflow distribution. Due to the constraint of the first baffle assembly 700, the air from 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 vent 710. In one possible implementation, the air from the outlet of the second fan 600 flows through the radiator 500 and then to the second air vent 140, instead of flowing to the heat exchanger 400 through the third air vent 150.

[0217] Figure 4 and Figure 5 The power conversion device 10 shown is Figures 1 to 3 The difference in the power conversion device 10 shown is that the heat exchanger 400 is placed on the second baffle assembly 900, and the heat exchanger 400 and the radiator 500 are located on different sides of the housing 160. The second baffle assembly 900 is used to guide cold air to the heat exchanger 400 for heat exchange.

[0218] like Figure 6 and Figure 7 As shown, the air outlet of the second fan 600 is parallel to the base plate 510 of the heat sink 500. The third fan 1100 provides separate ventilation for 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 operation of the second fan 600 can reduce the temperature of the heat sink 500, the second electronic component group 1300, and the third electronic component group 1400. The second fan 600 can be a blower fan or an exhaust fan, and the control logic for the speed of the second fan 600 can also be different.

[0219] in, Figure 1 The dashed arrows in the diagram indicate the direction of airflow.

[0220] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0221] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power conversion device, characterized in that, include: 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 located above the first chamber. The first air vent and the second air vent are respectively provided on the two side walls of the second chamber. The side wall where the first air vent is located and the side wall where the third air vent is located are 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 radiator is located between the first air vent and the second air vent; 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, Also includes: 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, characterized in that, 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 also includes 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, Also includes: 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, Also includes: A second electronic component group is disposed in the second chamber, and the second electronic component group is located between the heat sink and the second air outlet; 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 positioned opposite the heat sink, there are two first fans, 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, Also includes: 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, include: The power conversion device as described in any one of claims 1 to 10.

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