CN222030283U

CN222030283U - Power conversion apparatus

Info

Publication number: CN222030283U
Application number: CN202323669798.2U
Authority: CN
Inventors: 王位; 于任斌; 杨叶; 周杰; 刘龙; 王鹏
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-12-30
Filing date: 2023-12-30
Publication date: 2024-11-19
Anticipated expiration: 2033-12-30
Also published as: WO2025138472A1

Abstract

The present application discloses a power conversion device, including: a first cavity, a second cavity, and a radiator; wherein a power device is arranged in the first cavity; the radiator includes an evaporator and a condenser forming a circulation flow path with the evaporator, and the evaporator is used to absorb the heat of the power device; the condenser is located in the second cavity, and the second cavity can allow air to flow through the condenser to cool the condenser; the evaporator is located outside the second cavity. In the above power conversion device, a radiator is used to dissipate heat from the power device, thereby improving the heat dissipation capacity; the evaporator is external to the condenser, so that the volume of the second cavity is smaller, which facilitates the installation, disassembly and maintenance of the second cavity; the evaporator and the condenser are not in the same cavity, which avoids the hot air in the second cavity from affecting the evaporator, so that the temperature of the evaporator is relatively lower, so that the heat dissipation effect of the evaporator will be better, thereby improving the heat dissipation effect of the power conversion device.

Description

Power conversion apparatus

Technical Field

The application relates to the technical field of heat dissipation of power electronic equipment, in particular to power conversion equipment.

Background

With the continuous improvement of the power density of power conversion equipment such as an inverter, a PCS (energy storage converter) and the like, the heating value of the power conversion equipment is larger and larger, and particularly, the heating value of a power device in a cavity is larger and larger, so that the requirement of the power conversion equipment on the heat radiation capability is higher and higher.

At present, the power conversion equipment mainly adopts forced air cooling heat dissipation, and the heat dissipation capacity of the forced air cooling heat dissipation is difficult to improve, so that the forced air cooling heat dissipation is difficult to meet the heat dissipation requirement of the power conversion equipment with continuously improved power density.

In summary, how to design heat dissipation of the power conversion device to improve heat dissipation capability and meet the heat dissipation requirement of the power conversion device is a problem to be solved by those skilled in the art.

Disclosure of utility model

In view of the above, the present application is directed to a power conversion device to improve heat dissipation capability and meet the heat dissipation requirement of the power conversion device.

In order to achieve the above purpose, the present application provides the following technical solutions:

A power conversion apparatus comprising: the first cavity, the second cavity and the radiator;

Wherein, a power device is arranged in the first cavity; the radiator comprises an evaporator and a condenser forming a circulating flow path with the evaporator, and the evaporator is used for absorbing heat of the power device;

The condenser is positioned in the second cavity, and the second cavity can be used for air to flow through the condenser so as to cool the condenser; the evaporator is positioned outside the second cavity.

Optionally, the evaporator is located outside the first cavity.

Optionally, a magnetic device is further disposed in the second cavity.

Optionally, the magnetic device is located on top of the first cavity.

Optionally, the magnetic device is located at a side of the first cavity.

Optionally, the magnetic device and the evaporator are located on the same side of the first cavity.

Optionally, the magnetic devices are distributed on one side of the evaporator; or at least two magnetic devices are arranged, and the magnetic devices are distributed on two sides of the evaporator.

Optionally, the magnetic device in the second cavity is a first magnetic device;

the power conversion device further comprises a third cavity, and a second magnetic device is arranged in the third cavity.

Optionally, the evaporator is located in the third cavity;

And/or the third cavity is capable of providing air to flow through the second magnetic device to cool the second magnetic device.

Optionally, a magnetic device is further disposed outside the second cavity and outside the first cavity.

Optionally, the evaporator and the magnetic device are disposed relatively independently.

Optionally, the evaporator includes a first evaporation module and a second evaporation module, where the first evaporation module is used to absorb heat of the power device, and the second evaporation module is used to absorb heat of the magnetic device.

Optionally, the first evaporation module and the second evaporation module are different evaporation modules;

wherein the first evaporation module and the second evaporation module share the same condenser; or the first evaporation module and the second evaporation module are communicated with different condensers.

Optionally, the first evaporation module and the second evaporation module are the same evaporation module.

Optionally, the power conversion device further comprises a fourth cavity, and the evaporator is located in the fourth cavity.

Optionally, the evaporator is located at the top or side of the first cavity.

Optionally, the magnetic device is located in the fourth cavity.

Optionally, the fourth cavity is capable of providing air to flow through the magnetic device to cool the magnetic device.

Optionally, the fourth cavity has an air channel through which air flows, the air channel flowing through the magnetic device and the air channel not flowing through the evaporator;

And/or one of the air inlet and the air outlet of the fourth cavity is lower than the magnetic device, the other is higher than the magnetic device, the magnetic device is lower than the evaporator, and one of the air inlet and the air outlet of the fourth cavity, which is higher than the magnetic device, is lower than the top end of the evaporator;

And/or a fan is arranged in the fourth cavity, and the fan is positioned at one side of the magnetic device away from the evaporator.

Optionally, the power conversion apparatus further comprises a fifth cavity, the magnetic device being located in the fifth cavity, the fifth cavity being capable of allowing air to flow through the magnetic device to cool the magnetic device.

Optionally, the second and fifth chambers share a fan to flow air through the condenser and the magnetic device; wherein, the fan is located outside the second cavity and outside the fifth cavity.

Optionally, the fifth cavity and the second cavity are arranged in parallel or in series.

Optionally, the air inlet of the second cavity is opposite to the magnetic device, so that the air flow before entering the air inlet dissipates heat to the magnetic device; or the air outlet of the second cavity is opposite to the magnetic device, so that the air flow exhausted from the air outlet dissipates heat to the magnetic device.

Optionally, the evaporator is located in the first cavity.

In the power conversion equipment provided by the application, the radiator is adopted to radiate the power device, so that compared with the prior art adopting air cooling radiation, the radiating capacity is effectively improved, the radiating requirement of high power density of the power conversion equipment can be met, and the problem of insufficient traditional air cooling radiating capacity along with the improvement of the power density can be solved; the evaporator is arranged outside the condenser, so that the volume of the second cavity is smaller, and the second cavity is convenient to install, disassemble and maintain; the evaporator and the condenser are not arranged in the cavity, so that the influence of hot air in the second cavity on the evaporator is avoided, the temperature of the evaporator is relatively lower, the heat dissipation effect of the evaporator is better, and the heat dissipation effect of the power conversion equipment can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a power conversion apparatus according to a first embodiment of the present application;

fig. 2 is a front view of another structure of a power conversion apparatus according to a first embodiment of the present application;

fig. 3 is a front view of another structure of a power conversion apparatus according to a first embodiment of the present application;

fig. 4 is a front view of another structure of a power conversion apparatus according to a first embodiment of the present application;

FIG. 5 is a side view of the power conversion apparatus shown in FIG. 4;

FIG. 6 is a top view of the power conversion apparatus shown in FIG. 4;

fig. 7 is a front view showing another structure of a power conversion apparatus according to a first embodiment of the present application;

fig. 8 is a front view of another structure of a power conversion apparatus according to a first embodiment of the present application;

fig. 9 is a schematic structural diagram of a power conversion device according to a second embodiment of the present application;

Fig. 10 is a schematic diagram of another structure of a power conversion device according to a second embodiment of the present application;

Fig. 11 is a schematic structural diagram of a power conversion device according to a third embodiment of the present application;

fig. 12 is a schematic diagram of another structure of a power conversion device according to a third embodiment of the present application;

fig. 13 is a schematic diagram of another structure of a power conversion device according to a third embodiment of the present application;

fig. 14 is a schematic structural diagram of a power conversion device according to a fourth embodiment of the present application;

fig. 15 is a front view of a power conversion apparatus according to a fifth embodiment of the present application;

FIG. 16 is a side view of the power conversion device shown in FIG. 15;

FIG. 17 is a side view of the power conversion device shown in FIG. 15;

Fig. 18 is a schematic structural diagram of a power conversion device according to a sixth embodiment of the present application;

fig. 19 is a schematic diagram of another structure of a power conversion device according to a sixth embodiment of the present application.

Reference numerals illustrate:

1 is a first cavity, 101 is a backboard, 2 is a second cavity, 201 is a second cavity air inlet, 202 is a second cavity air outlet, 203 is a top cavity, 204 is a side cavity, 3 is a condenser, 4 is an evaporator, 401 is a first evaporation module, 402 is a second evaporation module, 403 is an evaporation module, 5 is a first fan, 6 is a power device, 7 is a magnetic device, 8 is a fourth cavity, 801 is a fourth cavity air inlet, 802 is a fourth cavity air outlet, 9 is a second fan, 10 is a third fan, and 11 is a fifth cavity.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application is greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

As shown in fig. 1 to 19, a power conversion apparatus provided in an embodiment of the present application includes: a first cavity 1, a second cavity 2, and a heat sink (not shown).

A power device 6 is arranged in the first cavity 1. The power device 6 includes IGBTs (Insulate-Gate Bipolar Transistor) and the like, and the specific type and structure of the power device 6 are not limited in this embodiment.

In practical applications, other devices, such as resistors, capacitors, chips, etc., may be disposed in the first cavity 1, which is not limited in this embodiment. The resistor is one type of magnetic device.

The first cavity 1 may be a closed cavity and a high protection cavity with high protection performance.

The radiator includes an evaporator 4 and a condenser 3 forming a circulation flow path with the evaporator 4.

The evaporator 4 and the condenser 3 form a circulation flow path through a gas phase pipeline and a liquid phase pipeline, wherein the gas phase pipeline is communicated with an outlet of the evaporator 4 and an inlet of the condenser 3, and the liquid cooling pipeline is communicated with an outlet of the condenser 3 and an inlet of the evaporator 4. The circulation flow path is provided with a phase change working medium. In order to facilitate the circulation flow of the phase-change working medium, the height of the condenser 3 and the height of the evaporator 4 can be selected to be equal to each other, or the height of the condenser 3 is higher than the height of the evaporator 4.

The heat dissipation principle of the radiator is as follows: the phase change working medium in the evaporator 4 absorbs heat, the liquid is changed into a gas phase, the gas enters the condenser 3 along a gas phase pipeline, the heat is released and condensed in the condenser 3 to be changed into the liquid, and the liquid flows back to the evaporator 4 through a liquid phase pipeline, so that the circulation is realized.

The evaporator 4 is used to absorb heat from the power device 6. Of course, the evaporator 4 may also absorb heat of other heat generating devices in the first cavity 1, which is not limited in this embodiment.

The evaporator 4 is intended to be in direct contact with the power device 6 or the evaporator 4 is intended to be in indirect contact with the power device 6 via a heat conducting member.

The condenser 3 is located within the second chamber 2, the second chamber 2 being capable of providing air to flow through the condenser 3 to cool the condenser 3.

The condenser 3 may be a parallel flow condenser or other type, and embodiments of the present application are not limited. The embodiment of the present application is not limited as to the type of the evaporator 4.

The second cavity 2 has an air inlet and an air outlet, the air inlet of the second cavity 2 can be referred to as a second cavity air inlet 201, the air outlet of the second cavity 2 can be referred to as a second cavity air outlet 202, the second cavity 2 can be communicated with the external environment of the whole power conversion equipment, and can also be communicated with other cavities except the first cavity 1 in the power conversion equipment, so long as the condenser 3 can be cooled.

In order to increase the cooling efficiency, the second cavity 2 may be selected as an open cavity, which second cavity 2 communicates with the external environment of the power conversion device.

The relative positional relationship between the second chamber 2 and the first chamber 1 is selected according to the actual situation, and this is not limited in this embodiment.

In order to facilitate the flow of air through the condenser 3, the above-mentioned power conversion device further comprises a first fan 5, which first fan 5 is arranged to drive air through the condenser 3. The type, number, and distribution of the first fans 5 are selected according to actual conditions, and this is not limited in the present embodiment.

In the case where the heat dissipation of the condenser 3 satisfies the requirement, the first fan 5 may not be provided.

In the power conversion equipment, the radiator is adopted to radiate the power device 6, compared with the prior art adopting air cooling radiation, the heat radiation capability is effectively improved, the heat radiation requirement of the power conversion equipment can be met, particularly the heat radiation requirement of the power conversion equipment for high power density can be met, and the problem that the traditional air cooling heat radiation capability is insufficient along with the improvement of the power density can be solved.

In the power conversion equipment, the evaporator 4 is positioned outside the second cavity 2, so that the evaporator 4 is arranged outside the condenser 3, the size of the second cavity 2 is smaller, and the second cavity 2 is convenient to install, detach and maintain; the evaporator 4 and the condenser 3 are not in one cavity, hot air flowing through the condenser 3 cannot flow through the evaporator 4, the phenomenon that hot air in the second cavity 2 affects the evaporator 4 is avoided, the temperature of the evaporator 4 is relatively lower, the heat dissipation effect of the evaporator 4 is better, and the heat dissipation effect of the power conversion equipment can be improved.

In the power conversion apparatus described above, the distribution of the evaporators 4 is selected in accordance with the actual situation. In one aspect, as shown in fig. 1-17, the evaporator 4 may alternatively be located outside the first chamber 1. On the other hand, as shown in fig. 18 and 19, the evaporator 4 is located in the first chamber 1.

In the case where the evaporator 4 is located outside the first chamber 1, the evaporator 4 may be optionally provided on the outer wall of the first chamber 1 for the purpose of facilitating the installation of the evaporator 4. In this way, the footprint of the overall structure is also reduced.

In the case where the evaporator 4 is located outside the first chamber 1, the evaporator 4 may be optionally located at a side of the first chamber 1 for convenience of installation of the evaporator 4.

In the case where the evaporator 4 is located outside the first chamber 1, as shown in fig. 1 to 13 and 15 to 17, the evaporator 4 may be selectively exposed outside the first chamber 1 and outside the second chamber 2; as shown in fig. 14, the power conversion apparatus may further include a fourth cavity 8, and the evaporator 4 is located in the fourth cavity 8.

In the power conversion apparatus described above, the magnetic device 7 may be provided at a position other than the inside of the first chamber 1. In the case where a magnetic device such as a resistor is provided in the first chamber 1, the type of the magnetic device 7 provided at a position other than the position in the first chamber 1 is different from the type of the magnetic device in the first chamber 1.

The magnetic device 7 may include a reactor or the like, and the specific type of the magnetic device 7 is not limited in this embodiment.

In some embodiments, as shown in fig. 1-8, 18 and 19, a magnetic device 7 is also disposed within the second cavity 2.

In other embodiments, as shown in fig. 9-17, the magnetic device 7 is further provided outside the second cavity 2 and outside the first cavity 1. In this way, the magnetic device 7 is arranged outside the condenser 3, so that the volume of the second cavity 2 is smaller, and the installation, the disassembly and the maintenance of the second cavity 2 are convenient; the magnetic device 7 and the condenser 3 are not in one cavity, so that independent heat dissipation of the magnetic device 7 can be realized, the heat dissipation effect of the magnetic device 7 can be improved, and the mutual interference between the heat dissipation of the magnetic device 7 and the heat dissipation of the condenser 3 can be avoided, so that the condenser 3 and the magnetic device 7 can obtain a better heat dissipation effect; meanwhile, the magnetic device 7 can be not considered in the process of designing and installing the condenser 3, the condenser 3 can be not considered in the process of designing and installing the magnetic device 7, and the flexibility of the structural layout of the power conversion equipment can be improved.

In the above embodiment, it is possible to select the flow of air through the condenser 3 to the magnetic device 7. Specifically, the magnetic device 7 is opposite to the second cavity air outlet 202, so that the air flow discharged from the second cavity air outlet 202 dissipates heat to the magnetic device 7. Of course, it is also possible to choose that the air flows through the magnetic means 7 before it flows through the condenser 3. Specifically, the magnetic device 7 is opposite to the second cavity air inlet 201, so that the air flow dissipates heat from the magnetic device 7 before entering the second cavity air inlet 201.

Since the magnetic device 7 has a higher temperature resistance than the condenser 3, the magnetic device 7 may be selected to be opposite to the second cavity air outlet 202.

The magnetic device 7 may be configured to dissipate heat in other ways than the above-described heat dissipation method, and is not limited to the above-described heat dissipation method.

In the above embodiment, on the one hand, as shown in fig. 9 to 13, the magnetic device 7 may be selectively exposed outside the first cavity 1 and outside the second cavity 2. Alternatively, as shown in fig. 14, the magnetic device 7 evaporators 4 may be located within a fourth cavity 8, the fourth cavity 8 being capable of providing air flow through the magnetic device 7 to cool the magnetic device 7. 15-17, the power conversion apparatus may further include a fifth cavity 11, the magnetic device 7 being located within the fifth cavity 11, the fifth cavity 11 being capable of providing air to flow through the magnetic device 7 to cool the magnetic device 7, and the evaporator 4 being located outside the fifth cavity 11.

The fourth cavity 8 has an air inlet and an air outlet, the air inlet of the fourth cavity 8 may be referred to as a fourth cavity air inlet 801, and the air outlet of the fourth cavity 8 may be referred to as a fourth cavity air outlet 802. The fourth cavity 8 may be in communication with the external environment of the whole power conversion device, or may be in communication with other cavities of the power conversion device than the first cavity 1 and the second cavity 2, as long as it is ensured that the magnetic device 7 can be cooled.

In order to increase the cooling efficiency, the fourth cavity 8 may be selected as an open cavity, which fourth cavity 8 communicates with the external environment of the power conversion device.

To facilitate the flow of air through the magnetic device 7, the power conversion device further comprises a second fan 9, which second fan 9 is arranged to drive air through the magnetic device 7.

The type, number, and distribution of the second fans 9 are selected according to actual conditions, and this is not limited in the present embodiment.

In the case where the heat dissipation of the condenser satisfies the requirement, the second fan 9 may not be provided.

The above-described flow of air in the fourth chamber 8 and the flow of air in the second chamber 2 may be associated, for example, the fourth chamber 8 and the second chamber 2 communicate, or the fourth chamber 8 and the second chamber 2 share a fan or the like. Of course, the flow of the air in the fourth chamber 88 and the flow of the air in the second chamber 2 may not be related, and may be selected according to the actual situation.

The relative positional relationship of the fourth chamber 8, the second chamber 2, and the first chamber 1 is selected according to the actual situation, and this is not limited in this embodiment.

Correspondingly, the fifth cavity 11 has an air inlet and an air outlet, the air inlet of the fifth cavity 11 may be referred to as a fifth cavity air inlet 1101, and the air outlet of the fifth cavity 11 may be referred to as a fifth cavity air outlet 1102. To facilitate the flow of air through the magnetic device 7, the power conversion device further comprises a third fan 10, which third fan 10 is arranged to drive air through the magnetic device 7. The type, number, and distribution of the third fans 10 are selected according to actual conditions, and the present embodiment is not limited thereto. Note that, when the condenser heat dissipation satisfies the requirement, the third fan 10 may not be provided.

For other structures of the fifth cavity 11, reference may be made to the foregoing description of the fourth cavity 8, and a detailed description thereof will be omitted.

In the power conversion apparatus described above, there are other arrangements of the magnetic devices 7. In other embodiments, the power conversion apparatus further comprises a third cavity, at least two of the magnetic devices 7, at least one of the magnetic devices 7 being a first magnetic device and at least one of the magnetic devices 7 being a second magnetic device, wherein the first magnetic device is located within the second cavity 2, the second magnetic device and the evaporator 4 are both located within the third cavity, the evaporator 4 is located within the third cavity, or the evaporator 4 is located outside the third cavity.

The arrangement of the evaporator 4 and the arrangement of the magnetic device 7 are described above separately, and in actual cases, the arrangement of the evaporator 4 and the arrangement of the magnetic device 7 may be combined. The following is a specific description of six examples.

Example 1

As shown in fig. 1 to 8, in the power conversion apparatus provided in the first embodiment, the evaporator 4 is located outside the first cavity 1 and outside the second cavity 2, and the evaporator 4 is exposed; the magnetic means 7 are located in the second cavity 2.

In the first embodiment, as shown in fig. 1 and 2, a first fan 5 is provided, and the first fan 5 is used to drive the airflow to flow through the condenser 3, i.e. the first fan 5 drives the airflow to flow from the second cavity air inlet 201 to the second cavity air outlet 202. Wherein the first fan 5 is disposed at the second cavity air inlet 201. Of course, the first fan 5 may alternatively be disposed at the second cavity air outlet 202.

As shown in fig. 1, the first fan 5 is located in the second chamber 2; as shown in fig. 2, the first fan 5 is located outside the second chamber 2.

In the structures shown in fig. 1 and 2, as the magnetic device 7 is positioned in the second cavity 2, forced air cooling heat dissipation of the condenser 3 and the magnetic device 7 is realized, and the heat dissipation effect is improved; it is also achieved that the condenser 3 and the magnetic device 7 share the first fan 5, simplifying the structure and reducing the cost.

As shown in fig. 3, it is also possible to naturally flow air through the condenser 3, i.e. without the first fan 5.

In the first embodiment, the position of the magnetic device 7 is selected according to the actual situation. As shown in fig. 1-3, the magnetic device 7 may be selected to be located on top of the first cavity 1, in which case the second cavity 2 may be selected to be located on top of the first cavity 1. As shown in fig. 4-8, the magnetic device 7 may be selected to be located on the side of the first cavity 1, in which case the second cavity 2 may be selected to be located on the top and side of the first cavity 1.

The side portion of the first chamber 1 refers to the side other than the top and bottom of the first chamber 1.

In case the magnetic means 7 is located at the side of the first chamber 1, it is optional for ease of installation that the magnetic means 7 and the evaporator 4 are located at the same side of the first chamber 1. Thus, the installation is convenient, and the occupied area of the whole structure is reduced. For ease of installation, both the side chamber 204 and the evaporator 4 may be chosen to be provided on the outer wall of the first chamber 1.

In case the magnetic means 7 and the evaporator 4 are located on the same side of the first cavity 1, the magnetic means 7 are distributed on at least one side of the evaporator 4.

In one aspect, at least one magnetic device 7 may be selected, the magnetic devices 7 being distributed on one side of the evaporator 4.

Alternatively, at least two magnetic devices 7 may be selected, with at least two magnetic devices 7 being distributed on both sides of the evaporator 4. Further, all the magnetic devices 7 are distributed on both sides of the evaporator. Illustratively, all of the magnetic devices 7 are distributed on opposite sides of the evaporator 4. Of course, in the case of at least two magnetic devices 7, it is also possible to select other locations of the evaporator 4 where the magnetic devices 7 are distributed.

In case the magnetic device 7 and the evaporator 4 are located on the same side of the first cavity 1, it is optional that both the magnetic device 7 and the evaporator 4 are located on the back side of the first cavity 1. In this case, it is possible to select a back plate 101 in which both the magnetic device 7 and the evaporator 4 are provided in the first chamber 1.

In some embodiments, as shown in fig. 4-8, the second cavity 2 comprises a top cavity 203 and at least one side cavity 204 in communication, the top cavity 203 being located at the top of the first cavity 1 and the side cavity 204 being located at the side of the first cavity 1. Wherein the condenser 3 is located in the top chamber 203 and the magnetic means 7 is located in the side chamber 204. Each side cavity 204 has at least one magnetic device 7.

As shown in fig. 7, the number of the magnetic devices 7 is one, and the number of the side cavities 204 is one. As shown in fig. 4-6 and 8, there are at least two magnetic devices 7, at least two side cavities 204, and each two side cavities 204 are arranged in parallel. It should be noted that each side cavity 204 and top cavity 203 are disposed in series. In this way, the parallel flow of the air flows in each two side cavities 204 can be realized, the heat dissipation effect of the magnetic devices 7 in each side cavity 204 is effectively improved, and the heat dissipation uniformity of all the magnetic devices 7 is improved.

It should be noted that, in the second cavity 2, the condenser 3 may be located upstream or downstream of the magnetic device 7 along the airflow direction, which is not limited in this embodiment according to the actual situation. Since the temperature resistance of the magnetic means 7 is relatively high, it is possible to choose that the condenser 3 is located upstream of the magnetic means 7 in the direction of the air flow within the second chamber 2.

As shown in fig. 4, the two side cavities 204 and the evaporator 4 are located at the same side of the first cavity 1, and the two side cavities 204 are distributed at two sides of the evaporator 4, and in the case that the two side cavities 204 are connected in parallel, the air duct of the second cavity 2 is in a pi shape; as shown in fig. 8, the three side cavities 204 and the evaporator 4 are located on the same side of the first cavity 1, and the three side cavities 204 are distributed on two sides of the evaporator 4; as shown in fig. 7, one side chamber 204 and the evaporator 4 are located on the same side of the first chamber 1, and one side chamber 204 is distributed on one side of the evaporator 4.

In the first embodiment, each side cavity 204 is provided with at least one second cavity air outlet 202, and each top cavity is provided with at least one second cavity air inlet 201. Of course, the positions of the second cavity air outlet 202 and the second cavity air inlet 201 may be selected to be interchanged, which is not limited in this embodiment.

In the first embodiment, in order to avoid the air outlet of the second cavity 2 affecting the evaporator 4, the second cavity air outlet 202 may be selected not to face the evaporator 4 so that the air flow discharged from the second cavity air outlet 202 does not flow through the evaporator 4. Illustratively, taking the example that the second cavity air outlet 202 is provided with the side cavity 204, the side cavity 204 and the evaporator 4 are all arranged at the side portion of the first cavity 1, the second cavity air outlet 202 is located at the bottom of the side cavity 204, or the second cavity air outlet 202 is located at the side of the side cavity 204 away from the evaporator 4.

In the first embodiment, the magnetic device 7 in the second cavity 2 may be selected as the first magnetic device; the power conversion device further comprises a third cavity, and a second magnetic device is arranged in the third cavity. At least one first magnetic device and at least one second magnetic device. In this case, the evaporator 4 may be selectively located in the third chamber, or the evaporator 4 may be located outside the third chamber.

To facilitate cooling the second magnetic device, the third cavity may be selected to enable air to flow through the second magnetic device to cool the second magnetic device. The power conversion device may further include a fan driving air through the third chamber. For the structure of the third cavity and the fans corresponding to the third cavity, reference may be made to the fourth cavity 8 and the second fan 9, and the fifth cavity 11 and the third fan 10, which are not described herein.

In the first embodiment, reference is made to the foregoing for other structures of the power conversion device, and the description thereof is omitted here.

Example two

As shown in fig. 9 and 10, the power conversion apparatus provided in the second embodiment is mainly different from the first embodiment in that: the magnetic device 7 is exposed outside the first cavity 1 and outside the second cavity 2.

In the second embodiment, the evaporator 4 is exposed outside the first cavity 1 and outside the second cavity 2, and the evaporator 4 and the magnetic device 7 are relatively independent, i.e. the heat dissipation of the magnetic device 7 is not related to the evaporator 4.

In the second embodiment, the second cavity 2 may be disposed on top of the first cavity 1. In this case, the magnetic means 7 may be provided at the top, side or other positions of the first cavity 1.

In the second embodiment, in order to avoid the air outlet of the second cavity 2 affecting the evaporator 4, the second cavity air outlet 202 may be selected not to face the evaporator 4 so that the air flow discharged from the second cavity air outlet 202 does not flow through the evaporator 4. Illustratively, taking the example that the second cavity 2 may be disposed at the top of the first cavity 1 and the evaporator 4 is disposed at the side of the first cavity 1, the second cavity air outlet 202 is located at the side of the second cavity 2, and the axis of the second cavity air outlet 202 may be parallel to the horizontal direction.

In the second embodiment, there are two heat dissipation modes of the magnetic device 7. On the one hand, as shown in fig. 9, the magnetic device 7 may dissipate heat in a natural heat dissipation manner. In this case, the magnetic device 7 may be selectively disposed on the outer wall of the first cavity 1, and in the case where the evaporator 4 is disposed on the outer wall of the first cavity 1, the magnetic device 7 and the evaporator 4 are located on the same side of the first cavity 1, and the magnetic device 7 and the evaporator 4 are distributed from bottom to top. Illustratively, the magnetic device 7 and the evaporator 4 are both disposed in the backplate 101 of the first chamber 1.

On the other hand, as shown in fig. 10, the air flowing through the condenser 3 flows toward the magnetic device 7 by the first fan 5. Specifically, the magnetic device 7 is opposite to the second cavity air outlet 202, so that the air flow discharged from the second cavity air outlet 202 dissipates heat to the magnetic device 7. Of course, the magnetic device 7 and the second cavity air inlet 201 may be opposite (see above for details), and the heat dissipation method is not limited to the heat dissipation method shown in fig. 10.

In the second embodiment, the first fan 5 may be provided, or the first fan 5 may not be provided, and this is selected according to the actual situation, which is not limited in the second embodiment.

In the second embodiment, reference is made to the foregoing for other structures of the power conversion apparatus, and details are not repeated here.

Example III

As shown in fig. 11 to 13, the power conversion apparatus provided in the sixth embodiment is different from the second embodiment mainly in that: the heat dissipation of the magnetic device 7 is associated with the evaporator 4, in particular the evaporator 4 also serves to absorb heat of the magnetic device 7.

In the sixth embodiment, the evaporator 4 and the magnetic device 7 are in direct contact or in indirect contact through a heat conductive member.

The evaporator 4 includes a first evaporation module 401 and a second evaporation module 402, wherein the first evaporation module 401 is used for absorbing heat of the power device 6, and the second evaporation module 402 is used for absorbing heat of the magnetic device 7.

In one aspect, as shown in fig. 11 and 12, the first evaporation module 401 and the second evaporation module 402 are different evaporation modules. In this case, as shown in fig. 11, the first evaporation module 401 and the second evaporation module 402 may be selected to share the same condenser 3; as shown in fig. 12, the first evaporation module 401 and the second evaporation module 402 may alternatively be in communication with different condensers 3.

The first evaporation module 401 and the second evaporation module 402 may be disposed in parallel, perpendicular, or otherwise, which is not limited in this embodiment.

On the other hand, as shown in fig. 13, the first evaporation module 401 and the second evaporation module 402 are the same evaporation module. In this case, the magnetic device 7 and the power device 6 may be selectively distributed on both sides of the evaporation module 403.

In the third embodiment, the magnetic device 7 and the evaporator 4 are exposed outside the first cavity 1 and outside the second cavity 2. Of course, it is possible to select that both the magnetic device 7 and the evaporator 4 are located in the fourth cavity 8, that the magnetic device 7 is exposed outside the first cavity 1 and outside the second cavity 2 and that the evaporator 4 is located in the first cavity 1, that the magnetic device 7 is exposed outside the first cavity 1 and outside the second cavity 2 and that the evaporator 4 is located in the fourth cavity 8, that the magnetic device 7 is located in the fourth cavity 8 and that the evaporator 4 is located in the first cavity 1, or that the magnetic device 7 and the evaporator 4 are distributed in other ways.

Example IV

As shown in fig. 14, the power conversion apparatus provided in the fourth embodiment is mainly different from the first embodiment in that: the evaporator 4 and the magnetic device 7 are both located in a fourth cavity 8.

In the fourth embodiment, the evaporator 4 may be optionally located at the top or side of the first chamber 1 for ease of installation. Accordingly, the magnetic device 7 may be selected to be located at the top or side of the first cavity 1. Further, the evaporator 4 and the magnetic device 7 are located on the same side of the first chamber 1. Based on this, it is possible to choose the fourth cavity 8 to be arranged at the side of the first cavity 1, in which case the second cavity 2 is distributed at the top ends of the first cavity 1 and the fourth cavity 8.

For ease of installation, the fourth cavity 8 may alternatively be arranged on the back of the first cavity 1, i.e. the fourth cavity 8 is arranged on the back plate 101 of the first cavity 1.

In order to reduce the influence of the air flow in the fourth chamber 8 on the evaporator 4, it is possible to choose the fourth chamber 8 to have a tunnel through which air flows, which tunnel passes through the magnetic means 7 and which tunnel does not pass through the evaporator 4.

As described above, the fourth chamber 8 has the fourth chamber air inlet 801 and the fourth chamber air outlet 802. In order to reduce the influence of the air flow in the fourth cavity 8 on the evaporator 4, one of the fourth cavity air inlet 801 and the fourth cavity air outlet 802 may be selected to be lower than the magnetic device 7, the other to be higher than the magnetic device 7, the magnetic device 7 to be lower than the evaporator 4, and one of the fourth cavity air inlet 801 and the fourth cavity air outlet 802 to be higher than the magnetic device 7 to be lower than the top end of the evaporator 4.

Illustratively, the fourth cavity air inlet 801, the magnetic device 7, and the evaporator 4 are distributed from bottom to top, the fourth cavity air outlet 802 may be disposed on a side of the fourth cavity 8 away from the evaporator 4, and the fourth cavity air outlet 802 is higher than the magnetic device 7 and lower than the top end of the evaporator 4.

In practical situations, the fourth cavity air inlet 801, the fourth cavity air outlet 802, the magnetic device 7, and the evaporator 4 are also selected to be distributed in other ways, and are not limited to the structure shown in fig. 14.

The second fan 9 may be disposed in the fourth cavity 8, or the second fan 9 may not be disposed, and the heat dissipation requirement of the magnetic device 7 may be selected, which is not limited in this embodiment.

To facilitate the installation of the second fan 9, it is optional that the second fan 9 is located on the side of the magnetic device 7 remote from the evaporator 4. The second fan 9 may be inside the fourth chamber 8 or outside the fourth chamber 8.

In the fourth embodiment, reference is made to the foregoing for other structures of the power conversion apparatus, and details thereof are not repeated here.

Example five

As shown in fig. 15 to 17, the power conversion apparatus provided in the fifth embodiment is different from the first embodiment mainly in that: a fifth cavity 11 is provided, the magnetic means 7 being located inside the fifth cavity 11, the evaporator 4 being located outside the fifth cavity 11 and outside the first cavity 1.

In the fifth embodiment, the second cavity 2 and the fifth cavity 11 may be both disposed at the top of the first cavity 1, or the second cavity 2 may be selectively disposed at the top of the first cavity 1 and the fifth cavity 11 may be disposed at the side of the first cavity 1, or the second cavity 2 and the fifth cavity 11 may be selectively distributed at the position, which is not limited in this embodiment.

As described above, the fifth chamber 11 has the fifth chamber air inlet 1101 and the fifth chamber air outlet 1102 to allow air to flow through the magnetic device 7 to cool the magnetic device 7. The positions of the fifth cavity air inlet 1101 and the fifth cavity air outlet 1102 are selected according to actual situations.

In the fifth embodiment, the third fan 10 may be provided, or the third fan 10 may not be provided, and the selection may be made according to the heat dissipation requirement of the magnetic device 7.

In the case of providing the third fan 10, the third fan 10 is located inside the fifth cavity 11 or outside the fifth cavity 11; the third fan 10 is located at the fifth cavity air intake 1101 or the fifth cavity air outlet 1102.

Since both the second chamber 2 and the fifth chamber 11 require an air flow through, the fifth chamber 11 and the second chamber 2 may be selected to share a fan such that air flows through the condenser 3 and the magnetic device 7, i.e. the condenser 3 and the magnetic device 7 share a fan. In this case, the aforementioned first fan 5 and third fan 10 are the same fan.

The fans shared by the fifth cavity 11 and the second cavity 2 may be one or more than two, and may be selected according to practical situations.

In the fifth embodiment, the fifth cavity 11 and the second cavity 2 share the fans, so that the number of fans can be reduced, the structure of the power conversion device is simplified, and the cost of the power conversion device is reduced.

In the case where the fifth chamber 11 and the second chamber 2 share a fan, the fifth chamber 11 and the second chamber 2 may be disposed in parallel or in series.

In the case that the fifth cavity 11 and the second cavity 2 are arranged in parallel, the fan is located outside the second cavity 2 and also located outside the fifth cavity 11, and the fifth cavity air inlet 1101 and the second cavity air inlet 201 may be located on the same side. Illustratively, the fans are disposed at the fifth cavity intake 1101 and at the second cavity intake 201 such that air flowing through the fans is split into two parts, one part flowing through the second cavity 2 and the other part flowing through the fifth cavity 11.

In order to facilitate that the fifth cavity air inlet 1101 and the second cavity air inlet 201 are located on the same side, the second cavity 2 and the fifth cavity 11 are both disposed at the top end of the first cavity 1, that is, the fifth cavity 11 and the second cavity 2 are disposed in parallel. Of course, the fifth chamber 11 may be alternatively disposed at another position, which is not limited in this embodiment.

In the case where the fifth chamber 11 and the second chamber 2 are disposed in series, the fifth chamber 11 is located downstream or upstream of the second chamber 2.

In the fifth embodiment, the fifth cavity 11 may be one or more than two. In the case where the number of fifth cavities 11 is two or more, in order to improve the heat dissipation effect of the magnetic device 7, the fifth cavities 11 and the second cavities 2 may be selected to be arranged in parallel, that is, each two fifth cavities 11 are also arranged in parallel.

In the case where the number of fifth cavities 11 is two or more, it is also possible to select that the fifth cavities 11 and the second cavities 2 are arranged in series, that is, each two fifth cavities 11 are also arranged in series.

In the case that the number of the fifth cavities 11 is more than two, it is also possible to select at least one fifth cavity 11 and the second cavity 2 to be arranged in parallel, and at least one fifth cavity 11 and the second cavity 2 to be arranged in series.

In the case that the fifth cavities 11 are more than two and the fifth cavities 11 and the second cavities 2 are arranged in parallel, all the fifth cavities 11 can be selected to be distributed on at least two sides of the second cavities 2, so that the fifth cavities 11 and the second cavities 2 can be conveniently arranged in parallel. Of course, it is also possible to choose that all fifth cavities 11 are distributed on one side of the second cavity 2.

In the case that the fifth cavities 11 are more than two and the fifth cavities 11 and the second cavities 2 are arranged in series, all the fifth cavities 11 can be selected to be distributed on one side of the second cavities 2, so that the fifth cavities 11 and the second cavities 2 are conveniently arranged in series. Of course, it is also possible to choose all fifth cavities 11 distributed on at least two sides of the second cavity 2.

In the fifth embodiment, reference is made to the foregoing for other structures of the power conversion apparatus, and details are not repeated here.

Example six

As shown in fig. 18 and 19, the power conversion apparatus provided in the fifth embodiment is mainly different from the first embodiment in that: the evaporator 4 is located within the first chamber 1.

As shown in fig. 18, there is a gap between the evaporator 4 and the inner wall of the first chamber 1. Or as shown in fig. 19, the evaporator 4 is in contact with the inner wall of the first chamber 1.

In the case where a gap is provided between the evaporator 4 and the inner wall of the first chamber 1, the electronic device may or may not be provided in the gap, and this embodiment is not limited thereto.

In this embodiment six, the magnetic device 7 is disposed in the second chamber 2. Of course, it is also possible to select that the magnetic device 7 is exposed outside the first cavity 1 and outside the second cavity 2, or that the magnetic device 7 is provided in other cavities than the second cavity 2.

In the sixth embodiment, reference is made to the foregoing for other structures of the power conversion apparatus, and details are not repeated here.

In the power conversion apparatus provided in the embodiment of the present application, the combination of the arrangement of the evaporator 4 and the arrangement of the magnetic device 7 is not limited to the above six embodiments, and other combinations may be selected according to the actual situation, which is not limited in the embodiment of the present application.

The power conversion device provided by the embodiment of the application can be an inverter, an energy storage converter or other devices, and the embodiment of the application is not limited to the above.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power conversion device, comprising: a first cavity, a second cavity, and a heat sink;

Wherein, a power device is arranged in the first cavity; the radiator comprises an evaporator and a condenser forming a circulation flow path with the evaporator, and the evaporator is used to absorb the heat of the power device;

The condenser is located in the second cavity, and the second cavity can allow air to flow through the condenser to cool the condenser; the evaporator is located outside the second cavity.

2 . The power conversion device according to claim 1 , wherein the evaporator is located outside the first cavity. 3 .

3 . The power conversion device according to claim 2 , characterized in that a magnetic device is also provided in the second cavity.

The power conversion device according to claim 3 , wherein the magnetic device is located at the top of the first cavity.

5 . The power conversion device according to claim 3 , wherein the magnetic device is located on a side of the first cavity.

6 . The power conversion device according to claim 5 , wherein the magnetic device and the evaporator are located on the same side of the first cavity.

7 . The power conversion device according to claim 6 , characterized in that there is at least one magnetic device, and the magnetic device is distributed on one side of the evaporator; or, there are at least two magnetic devices, and the magnetic devices are distributed on both sides of the evaporator.

8. The power conversion device according to claim 3, characterized in that:

The magnetic device in the second cavity is a first magnetic device;

The power conversion device further includes a third cavity, in which a second magnetic device is disposed.

9. The power conversion device according to claim 8, characterized in that:

The evaporator is located in the third cavity;

And/or, the third cavity can allow air to flow through the second magnetic component to cool the second magnetic component.

10 . The power conversion device according to claim 2 , wherein a magnetic device is further provided outside the second cavity and outside the first cavity.

11 . The power conversion device according to claim 10 , wherein the evaporator and the magnetic device are arranged relatively independently.

12 . The power conversion device according to claim 10 , wherein the evaporator comprises a first evaporation module and a second evaporation module, the first evaporation module is used to absorb heat from the power device, and the second evaporation module is used to absorb heat from the magnetic device.

13. The power conversion device according to claim 12, characterized in that the first evaporation module and the second evaporation module are different evaporation modules;

The first evaporation module and the second evaporation module share the same condenser; or the first evaporation module and the second evaporation module are connected to different condensers.

14 . The power conversion device according to claim 12 , wherein the first evaporation module and the second evaporation module are the same evaporation module.

15 . The power conversion device according to claim 10 , further comprising a fourth cavity, wherein the evaporator is located in the fourth cavity.

16 . The power conversion device according to claim 9 or 15 , wherein the evaporator is located on the top or side of the first cavity.

17 . The power conversion device according to claim 15 , wherein the magnetic device is located in the fourth cavity.

18 . The power conversion device according to claim 17 , wherein the fourth cavity is capable of allowing air to flow through the magnetic component to cool the magnetic component.

19. The power conversion device according to claim 18, characterized in that:

The fourth cavity has an air duct for air to flow through, the air duct flows through the magnetic device, and the air duct does not flow through the evaporator;

And/or, one of the air inlet and the air outlet of the fourth cavity is lower than the magnetic device, and the other is higher than the magnetic device, the magnetic device is lower than the evaporator, and one of the air inlet and the air outlet of the fourth cavity that is higher than the magnetic device is lower than the top of the evaporator;

And/or, a fan is disposed in the fourth cavity, and the fan is located on a side of the magnetic device away from the evaporator.

20 . The power conversion device according to claim 10 , further comprising a fifth cavity, wherein the magnetic device is located in the fifth cavity, and the fifth cavity enables air to flow through the magnetic device to cool the magnetic device.

21. The power conversion device according to claim 20, characterized in that the second cavity and the fifth cavity share a fan to allow air to flow through the condenser and the magnetic device; wherein the fan is located outside the second cavity and outside the fifth cavity.

22 . The power conversion device according to claim 20 , wherein the fifth cavity and the second cavity are arranged in parallel or in series.

23. The power conversion device according to claim 10 is characterized in that the air inlet of the second cavity is opposite to the magnetic device, so that the airflow before entering the air inlet dissipates heat for the magnetic device; or, the air outlet of the second cavity is opposite to the magnetic device, so that the airflow discharged from the air outlet dissipates heat for the magnetic device.

24. The power conversion device according to claim 1, characterized in that the evaporator is located in the first cavity.