Power conversion apparatus

Abstract

Disclosed in the present application is a power conversion apparatus, comprising a first cavity, a second cavity and a heat dissipator, wherein a power device is provided in the first cavity; the heat dissipator comprises an evaporator and a condenser, which forms a circulating flow path with the evaporator, the evaporator being configured to absorb 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; and the evaporator is located outside the second cavity. In the power conversion apparatus, the heat dissipator is used to perform heat dissipation on the power device, such that the heat dissipation capacity is improved; the evaporator is externally arranged relative to the condenser, such that the second cavity has a relatively small size, thereby facilitating the mounting, disassembly and maintenance of the second cavity; and the evaporator and the condenser are not in the same cavity, such that hot air in the second cavity is prevented from affecting the evaporator, and the temperature of the evaporator is relatively lower, thereby making a heat dissipation effect of the evaporator better, and thus improving a heat dissipation effect of the power conversion apparatus.

Description

Power conversion equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 30, 2023, with application number 202323669798.2 and invention name “Power Conversion Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of heat dissipation of power electronic equipment, and more specifically, to power conversion equipment. Background Art

[0003] As the power density of power conversion equipment such as inverters and PCS (energy storage converters) continues to increase, the heat generated by power conversion equipment is getting higher and higher, especially the heat generated by power devices in the cavity, which makes the power conversion equipment have higher and higher requirements for heat dissipation capacity.

[0004] At present, power conversion equipment mainly adopts forced air cooling for heat dissipation, but the heat dissipation capacity of forced air cooling is difficult to improve, resulting in forced air cooling being difficult to meet the heat dissipation needs of power conversion equipment with continuously increasing power density.

[0005] In summary, how to design the heat dissipation of a power conversion device to improve the heat dissipation capability and meet the heat dissipation requirements of the power conversion device is an urgent problem to be solved by those skilled in the art.

[0006] Summary of the Invention

[0007] In view of this, the purpose of this application is to provide a power conversion device to improve the heat dissipation capability and meet the heat dissipation requirements of the power conversion device.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] A power conversion device comprises: a first cavity, a second cavity, and a heat sink;

[0010] Wherein, a power device is provided 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 heat from the power device;

[0011] 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.

[0012] Optionally, the evaporator is located outside the first cavity.

[0013] Optionally, a magnetic device is further provided in the second cavity.

[0014] Optionally, the magnetic device is located at the top of the first cavity.

[0015] Optionally, the magnetic device is located on a side of the first cavity.

[0016] Optionally, the magnetic device and the evaporator are located on the same side of the first cavity.

[0017] Optionally, 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.

[0018] Optionally, the magnetic device in the second cavity is a first magnetic device;

[0019] The power conversion device further includes a third cavity, in which a second magnetic device is disposed.

[0020] Optionally, the evaporator is located in the third cavity;

[0021] And / or, the third cavity can allow air to flow through the second magnetic component to cool the second magnetic component.

[0022] Optionally, a magnetic device is further provided outside the second cavity and outside the first cavity.

[0023] Optionally, the evaporator and the magnetic device are arranged relatively independently.

[0024] Optionally, the evaporator includes 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.

[0025] Optionally, the first evaporation module and the second evaporation module are different evaporation modules;

[0026] 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.

[0027] Optionally, the first evaporation module and the second evaporation module are the same evaporation module.

[0028] Optionally, the power conversion device further includes a fourth cavity, and the evaporator is located in the fourth cavity.

[0029] Optionally, the evaporator is located on the top or side of the first cavity.

[0030] Optionally, the magnetic device is located in the fourth cavity.

[0031] Optionally, the fourth cavity can allow air to flow through the magnetic component to cool the magnetic component.

[0032] Optionally, the fourth cavity has an air duct for air to flow through, the air duct flows through the magnetic device and does not flow through the evaporator;

[0033] 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 the 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;

[0034] And / or, a fan is provided in the fourth cavity, and the fan is located on a side of the magnetic component away from the evaporator.

[0035] Optionally, the power conversion device further includes a fifth cavity, the magnetic device is located in the fifth cavity, and the fifth cavity can allow air to flow through the magnetic device to cool the magnetic device.

[0036] Optionally, 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.

[0037] Optionally, the fifth cavity and the second cavity are arranged in parallel or in series.

[0038] Optionally, 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.

[0039] Optionally, the evaporator is located in the first cavity.

[0040] In the power conversion device provided by the present application, a radiator is used to dissipate heat from the power device, which effectively improves the heat dissipation capacity compared with the air cooling heat dissipation used in the prior art, can meet the heat dissipation requirements of the high power density of the power conversion equipment, and can solve the problem of insufficient traditional air cooling heat dissipation capacity as the power density increases; the evaporator is placed outside 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 affecting the evaporator, making the temperature of the evaporator 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0042] FIG1 is a schematic structural diagram of a power conversion device provided in Example 1 of the present application;

[0043] FIG2 is a front view of another structure of a power conversion device provided in Example 1 of the present application;

[0044] FIG3 is a front view of another structure of a power conversion device provided in Example 1 of the present application;

[0045] FIG4 is a front view of another structure of the power conversion device provided in Example 1 of the present application;

[0046] FIG5 is a side view of the power conversion device shown in FIG4 ;

[0047] FIG6 is a top view of the power conversion device shown in FIG4 ;

[0048] FIG7 is a front view of another structure of the power conversion device provided in Example 1 of the present application;

[0049] FIG8 is a front view of another structure of the power conversion device provided in Example 1 of the present application;

[0050] FIG9 is a schematic structural diagram of a power conversion device provided in Example 2 of the present application;

[0051] FIG10 is another structural diagram of a power conversion device provided in Example 2 of the present application;

[0052] FIG11 is a schematic structural diagram of a power conversion device provided in Example 3 of the present application;

[0053] FIG12 is another structural diagram of a power conversion device provided in Example 3 of the present application;

[0054] FIG13 is another structural diagram of a power conversion device provided in Example 3 of the present application;

[0055] FIG14 is a schematic structural diagram of a power conversion device provided in Example 4 of the present application;

[0056] FIG15 is a front view of a power conversion device provided in Example 5 of the present application;

[0057] FIG16 is a side view of the power conversion device shown in FIG15 ;

[0058] FIG17 is a side view of the power conversion device shown in FIG15 ;

[0059] FIG18 is a schematic structural diagram of a power conversion device provided in Example 6 of the present application;

[0060] Figure 19 is another structural schematic diagram of the power conversion device provided in Example 6 of the present application.

[0061] Explanation of the figure marks: 1 is the first cavity, 101 is the back plate, 2 is the second cavity, 201 is the air inlet of the second cavity, 202 is the air outlet of the second cavity, 203 is the top cavity, 204 is the side cavity, 3 is the condenser, 4 is the evaporator, 401 is the first evaporation module, 402 is the second evaporation module, 403 is the evaporation module, 5 is the first fan, 6 is the power device, 7 is the magnetic device, 8 is the fourth cavity, 801 is the air inlet of the fourth cavity, 802 is the air outlet of the fourth cavity, 9 is the second fan, 10 is the third fan, and 11 is the fifth cavity. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0063] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0064] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0065] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0066] As shown in Figures 1 to 19, the power conversion device provided in the embodiment of the present application includes: a first cavity 1, a second cavity 2, and a heat sink (not marked in the figures).

[0067] A power device 6 is disposed in the first cavity 1. The power device 6 includes an IGBT (Insulate-Gate Bipolar Transistor) and the like. This embodiment does not limit the specific type and structure of the power device 6.

[0068] In actual situations, other devices such as resistors, capacitors, chips, etc. may also be placed in the first cavity 1, which is not limited in this embodiment. It should be noted that a resistor is a type of magnetic device.

[0069] The first cavity 1 can be a sealed cavity or a high-protection cavity with high protection performance.

[0070] The radiator includes an evaporator 4 and a condenser 3 forming a circulation flow path with the evaporator 4 .

[0071] It should be noted that the evaporator 4 and condenser 3 form a circulation flow path through a gas-phase pipeline and a liquid-phase pipeline. The gas-phase pipeline connects the outlet of the evaporator 4 and the inlet of the condenser 3, and the liquid-cooling pipeline connects the outlet of the condenser 3 and the inlet of the evaporator 4. The circulation flow path contains a phase-change working fluid. To facilitate the circulation of the phase-change working fluid, the condenser 3 and evaporator 4 can be arranged at the same height, or the condenser 3 can be higher than the evaporator 4.

[0072] The heat dissipation principle of the radiator is as follows: the phase change medium in the evaporator 4 absorbs heat and changes from liquid to gas phase. The gas enters the condenser 3 along the gas phase pipeline, releases heat and condenses into liquid in the condenser 3, and flows back to the evaporator 4 through the liquid phase pipeline to realize circulation.

[0073] The evaporator 4 is used to absorb the heat of the power device 6. Of course, the evaporator 4 can also absorb the heat of other heating devices in the first cavity 1, which is not limited in this embodiment.

[0074] The evaporator 4 is used to be in direct contact with the power device 6 or the evaporator 4 is used to be in indirect contact with the power device 6 via a heat conducting member.

[0075] The condenser 3 is located in the second cavity 2 , and the second cavity 2 can allow air to flow through the condenser 3 to cool the condenser 3 .

[0076] The condenser 3 may be a parallel flow condenser or other types, which is not limited in the present embodiment. The type of the evaporator 4 is also not limited in the present embodiment.

[0077] The second cavity 2 has an air inlet and an air outlet. The air inlet of the second cavity 2 can be called the second cavity air inlet 201, and the air outlet of the second cavity 2 can be called the second cavity air outlet 202. The second cavity 2 can be connected to the external environment of the entire power conversion device, and can also be connected to other cavities in the power conversion device except the first cavity 1, as long as it can ensure that the condenser 3 can be cooled.

[0078] In order to improve the cooling efficiency, the second cavity 2 may be selected as an open cavity, and the second cavity 2 is connected to the external environment of the power conversion device.

[0079] The relative positional relationship between the second cavity 2 and the first cavity 1 is selected according to actual conditions and is not limited in this embodiment.

[0080] To facilitate airflow through the condenser 3, the power conversion device further includes a first fan 5 for driving air through the condenser 3. The type, number, and distribution of the first fans 5 are selected based on actual conditions and are not limited in this embodiment.

[0081] It should be noted that, if the heat dissipation of the condenser 3 meets the requirements, the first fan 5 may not be provided.

[0082] In the above-mentioned power conversion equipment, a radiator is used to dissipate heat from the power device 6. Compared with the existing technology using air cooling, the heat dissipation capacity is effectively improved, and the heat dissipation requirements of the power conversion equipment can be met, especially the heat dissipation requirements of the power conversion equipment with high power density. It can solve the problem of insufficient traditional air cooling heat dissipation capacity as the power density increases.

[0083] In the above-mentioned power conversion device, the evaporator 4 is located outside the second cavity 2, so that the evaporator 4 is placed outside the condenser 3, making the volume of the second cavity 2 smaller, and facilitating the installation, disassembly and maintenance of the second cavity 2; the evaporator 4 and the condenser 3 are not in the same cavity, and the hot air flow flowing through the condenser 3 will not flow through the evaporator 4, avoiding the hot air in the second cavity 2 affecting the evaporator 4, making the temperature of the evaporator 4 relatively lower, so that the heat dissipation effect of the evaporator 4 will be better, thereby improving the heat dissipation effect of the power conversion device.

[0084] In the above power conversion device, the distribution of the evaporator 4 can be selected according to the actual situation. On the one hand, as shown in Figures 1 to 17, the evaporator 4 can be selected to be located outside the first cavity 1. On the other hand, as shown in Figures 18 and 19, the evaporator 4 can be located inside the first cavity 1.

[0085] When the evaporator 4 is located outside the first cavity 1, in order to facilitate the installation of the evaporator 4, the evaporator 4 can be selected to be arranged on the outer wall of the first cavity 1. In this way, the floor space of the entire structure is also reduced.

[0086] In the case where the evaporator 4 is located outside the first cavity 1 , in order to facilitate the installation of the evaporator 4 , the evaporator 4 may be located at the side of the first cavity 1 .

[0087] When the evaporator 4 is located outside the first cavity 1, as shown in Figures 1-13 and Figures 15-17, the evaporator 4 can be selected to be exposed outside the first cavity 1 and outside the second cavity 2; as shown in Figure 14, the above-mentioned power conversion device can also be selected to include a fourth cavity 8, and the evaporator 4 is located in the fourth cavity 8.

[0088] In the above power conversion device, a magnetic device 7 may be further provided at a location other than the first cavity 1. It should be noted that, when a magnetic device such as a resistor is provided in the first cavity 1, the magnetic device 7 provided at a location other than the first cavity 1 is of a different type than the magnetic device in the first cavity 1.

[0089] The magnetic device 7 may include a reactor or other devices. This embodiment does not limit the specific type of the magnetic device 7 .

[0090] In some embodiments, as shown in FIG. 1 to FIG. 8 , FIG. 18 and FIG. 19 , a magnetic device 7 is further provided in the second cavity 2 .

[0091] In some other embodiments, as shown in Figures 9 to 17, a 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 placed outside the condenser 3, making the volume of the second cavity 2 smaller and facilitating the installation, disassembly and maintenance of the second cavity 2; the magnetic device 7 and the condenser 3 are not in the same cavity, so that the magnetic device 7 can dissipate heat independently, which can improve the heat dissipation effect of the magnetic device 7 and avoid mutual interference between the heat dissipation of the magnetic device 7 and the heat dissipation of the condenser 3, so that the condenser 3 and the magnetic device 7 can obtain a better heat dissipation effect; at the same time, the magnetic device 7 can be ignored in the process of designing and installing the condenser 3, and the condenser 3 can be ignored in the process of designing and installing the magnetic device 7, which can improve the flexibility of the structural layout of the power conversion equipment.

[0092] In the above embodiment, the air flowing through the condenser 3 can be selected to flow toward the magnetic device 7. Specifically, the magnetic device 7 is opposite to the second cavity air outlet 202, so that the airflow discharged from the second cavity air outlet 202 dissipates heat from the magnetic device 7. Of course, it is also possible to select that the air flows through the magnetic device 7 before flowing through the condenser 3. Specifically, the magnetic device 7 is opposite to the second cavity air inlet 201, so that the airflow dissipates heat from the magnetic device 7 before entering the second cavity air inlet 201.

[0093] Since the magnetic device 7 has a higher temperature resistance than the condenser 3 , the magnetic device 7 and the second cavity air outlet 202 may be positioned opposite to each other.

[0094] In addition to the above heat dissipation method, the magnetic device 7 may also adopt other heat dissipation methods and is not limited to the above heat dissipation method.

[0095] In the above embodiment, on the one hand, as shown in Figures 9 to 13 , the magnetic device 7 can be exposed outside the first cavity 1 and the second cavity 2. On the other hand, as shown in Figure 14 , the magnetic device 7 and the evaporator 4 can be both located in the fourth cavity 8, and the fourth cavity 8 can allow air to flow through the magnetic device 7 to cool the magnetic device 7. On the other hand, as shown in Figures 15 to 17 , the power conversion device can further include a fifth cavity 11, the magnetic device 7 is located in the fifth cavity 11, the fifth cavity 11 can allow air to flow through the magnetic device 7 to cool the magnetic device 7, and the evaporator 4 is located outside the fifth cavity 11.

[0096] The fourth cavity 8 has an air inlet and an air outlet. The air inlet of the fourth cavity 8 can be referred to as the fourth cavity air inlet 801, and the air outlet of the fourth cavity 8 can be referred to as the fourth cavity air outlet 802. The fourth cavity 8 can communicate with the external environment of the entire power conversion device, or can communicate with other cavities in the power conversion device other than the first cavity 1 and the second cavity 2, as long as it can ensure cooling of the magnetic device 7.

[0097] In order to improve the cooling efficiency, the fourth cavity 8 may be selected as an open cavity, and the fourth cavity 8 is connected to the external environment of the power conversion device.

[0098] In order to facilitate airflow through the magnetic device 7 , the power conversion device further includes a second fan 9 , which is used to drive air to flow through the magnetic device 7 .

[0099] The type, number, and distribution of the second fans 9 are selected according to actual conditions and are not limited in this embodiment.

[0100] It should be noted that, if the heat dissipation of the condenser meets the requirements, the second fan 9 may not be provided.

[0101] The flow of air in the fourth cavity 8 and the flow of air in the second cavity 2 can be correlated. For example, the fourth cavity 8 and the second cavity 2 are connected, or the fourth cavity 8 and the second cavity 2 share a fan. Of course, the flow of air in the fourth cavity 88 and the flow of air in the second cavity 2 can also be uncorrelated, depending on the actual situation.

[0102] The relative positional relationship among the fourth cavity 8 , the second cavity 2 and the first cavity 1 is selected according to actual conditions and is not limited in this embodiment.

[0103] Correspondingly, the fifth cavity 11 has an air inlet and an air outlet. The air inlet of the fifth cavity 11 can be referred to as the fifth cavity air inlet 1101, and the air outlet of the fifth cavity 11 can be referred to as the fifth cavity air outlet 1102. In order to facilitate airflow through the magnetic device 7, the power conversion device further includes a third fan 10, which is used to drive air through the magnetic device 7. The type, number, and distribution of the third fan 10 are selected according to actual conditions and are not limited in this embodiment. It should be noted that if the heat dissipation of the condenser meets the requirements, the third fan 10 may not be provided.

[0104] For other structures of the fifth cavity 11 , reference may be made to the above description of the fourth cavity 8 , which will not be repeated here.

[0105] In the above-mentioned power conversion device, the magnetic device 7 can be arranged in other ways. In some other embodiments, the power conversion device further includes a third cavity, and there are at least two magnetic devices 7, at least one magnetic device 7 is a first magnetic device, and at least one magnetic device 7 is a second magnetic device, wherein the first magnetic device is located in the second cavity 2, the second magnetic device and the evaporator 4 are both located in the third cavity, the evaporator 4 is located in the third cavity, or the evaporator 4 is located outside the third cavity.

[0106] The above descriptions describe the arrangement of the evaporator 4 and the arrangement of the magnetic device 7 separately. In actual situations, the arrangement of the evaporator 4 and the arrangement of the magnetic device 7 can be combined.

[0107] Example 1

[0108] As shown in Figures 1 to 8, in the power conversion device provided in the first embodiment, the evaporator 4 is located outside the first cavity 1 and the second cavity 2, and the evaporator 4 is exposed; the magnetic device 7 is located in the second cavity 2.

[0109] In the first embodiment, as shown in Figures 1 and 2, a first fan 5 is provided to drive airflow through the condenser 3, that is, the first fan 5 drives airflow from the second cavity air inlet 201 to the second cavity air outlet 202. The first fan 5 is provided at the second cavity air inlet 201. Of course, the first fan 5 can also be provided at the second cavity air outlet 202.

[0110] As shown in FIG. 1 , the first fan 5 is located inside the second cavity 2 ; as shown in FIG. 2 , the first fan 5 is located outside the second cavity 2 .

[0111] In the structure shown in Figures 1 and 2, since the magnetic device 7 is located in the second cavity 2, forced air cooling of the condenser 3 and the magnetic device 7 is achieved, thereby improving the heat dissipation effect; it also enables the condenser 3 and the magnetic device 7 to share the first fan 5, thereby simplifying the structure and reducing costs.

[0112] As shown in FIG. 3 , the air may flow through the condenser 3 naturally, that is, the first fan 5 is not provided.

[0113] In this first embodiment, the position of the magnetic device 7 is selected based on actual conditions. As shown in Figures 1-3 , the magnetic device 7 can be located at the top of the first cavity 1 . In this case, the second cavity 2 can be located at the top of the first cavity 1 . As shown in Figures 4-8 , the magnetic device 7 can be located at the side of the first cavity 1 . In this case, the second cavity 2 can be located at both the top and the side of the first cavity 1 .

[0114] It should be noted that the side of the first cavity 1 refers to the other sides except the top and bottom of the first cavity 1 .

[0115] When the magnetic device 7 is located on the side of the first cavity 1, for ease of installation, the magnetic device 7 and the evaporator 4 can be located on the same side of the first cavity 1. This facilitates installation and reduces the overall footprint of the structure. For ease of installation, the side cavity 204 and the evaporator 4 can both be located on the outer wall of the first cavity 1.

[0116] When the magnetic device 7 and the evaporator 4 are located on the same side of the first chamber 1 , the magnetic device 7 is distributed on at least one side of the evaporator 4 .

[0117] On one hand, at least one magnetic device 7 can be selected, and the magnetic device 7 is distributed on one side of the evaporator 4 .

[0118] Alternatively, at least two magnetic devices 7 may be provided, with at least two magnetic devices 7 located on both sides of the evaporator 4. Furthermore, all magnetic devices 7 may be located on both sides of the evaporator. For example, all magnetic devices 7 may be located on opposite sides of the evaporator 4. Of course, when at least two magnetic devices 7 are provided, the magnetic devices 7 may also be located at other locations on the evaporator 4.

[0119] When the magnetic device 7 and the evaporator 4 are located on the same side of the first cavity 1 , the magnetic device 7 and the evaporator 4 can be located on the back side of the first cavity 1 . In this case, the magnetic device 7 and the evaporator 4 can be both provided on the back plate 101 of the first cavity 1 .

[0120] In some embodiments, as shown in Figures 4-8 , the second cavity 2 includes a connected top cavity 203 and at least one side cavity 204. The top cavity 203 is located at the top of the first cavity 1, and the side cavity 204 is located at the side of the first cavity 1. The condenser 3 is located in the top cavity 203, and the magnetic device 7 is located in the side cavity 204. Each side cavity 204 has at least one magnetic device 7.

[0121] As shown in Figure 7, there is one magnetic device 7 and one side cavity 204. As shown in Figures 4-6 and 8, there are at least two magnetic devices 7 and 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 the top cavity 203 are arranged in series. In this way, the airflow in each two side cavities 204 can flow in parallel, effectively improving the heat dissipation effect of the magnetic device 7 in each side cavity 204 and improving the heat dissipation uniformity of all magnetic devices 7.

[0122] It should be noted that, within the second cavity 2, the condenser 3 can be located upstream or downstream of the magnetic device 7 along the airflow direction, depending on the actual situation, and this embodiment does not limit this. Due to the high temperature resistance of the magnetic device 7, the condenser 3 can be located upstream of the magnetic device 7 along the airflow direction within the second cavity 2.

[0123] As shown in Figure 4, the two side cavities 204 and the evaporator 4 are located on the same side of the first cavity 1, and the two side cavities 204 are distributed on both sides of the evaporator 4. When the two side cavities 204 are connected in parallel, the air duct of the second cavity 2 is in a "π" shape; as shown in Figure 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 both sides of the evaporator 4; as shown in Figure 7, one side cavity 204 and the evaporator 4 are located on the same side of the first cavity 1, and one side cavity 204 is distributed on one side of the evaporator 4.

[0124] 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 can be interchanged, and this embodiment does not limit this.

[0125] In the first embodiment, in order to prevent the air discharged from the second cavity 2 from affecting the evaporator 4, the second cavity air outlet 202 may be configured not to face the evaporator 4 so that the airflow discharged from the second cavity air outlet 202 does not flow through the evaporator 4. For example, taking the example where the second cavity air outlet 202 is provided with a side cavity 204, and the side cavity 204 and the evaporator 4 are both provided on the side 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 on the side of the side cavity 204 away from the evaporator 4.

[0126] In this first embodiment, the magnetic device 7 in the second cavity 2 can also be selected as a first magnetic device. The power conversion device also includes a third cavity, in which a second magnetic device is disposed. There is at least one first magnetic device and at least one second magnetic device. In this case, the evaporator 4 can be located within the third cavity or outside the third cavity.

[0127] In order to facilitate cooling of the second magnetic device, the third cavity can be selected to allow air to flow through the second magnetic device to cool the second magnetic device. The power conversion device may further include a fan that drives air to flow through the third cavity. For the structure of the third cavity and the fan corresponding to the third cavity, reference may be made to the fourth cavity 8 and the second fan 9, as well as the fifth cavity 11 and the third fan 10 described above, which will not be repeated here.

[0128] In the first embodiment, other structures of the power conversion device can be referred to above and will not be described again here.

[0129] Example 2

[0130] As shown in FIG9 and FIG10 , the power conversion device provided in the second embodiment differs from that in the first embodiment mainly in that the magnetic device 7 is exposed and arranged outside the first cavity 1 and outside the second cavity 2 .

[0131] In the second embodiment, the evaporator 4 is exposed outside the first cavity 1 and the second cavity 2 , and the evaporator 4 and the magnetic device 7 are relatively independently provided, that is, the heat dissipation of the magnetic device 7 is not related to the evaporator 4 .

[0132] In the second embodiment, the second cavity 2 can be disposed on the top of the first cavity 1. In this case, the magnetic device 7 can be disposed on the top, side or other positions of the first cavity 1.

[0133] In the second embodiment, in order to prevent the air discharged from the second cavity 2 from affecting the evaporator 4, the second cavity air outlet 202 may be configured not to face the evaporator 4 so that the airflow discharged from the second cavity air outlet 202 does not flow through the evaporator 4. For example, in the case where the second cavity 2 is 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.

[0134] In this second embodiment, there are two ways to dissipate heat from the magnetic device 7. On the one hand, as shown in Figure 9, the magnetic device 7 can dissipate heat naturally. In this case, the magnetic device 7 can be installed on the outer wall of the first cavity 1. If the evaporator 4 is installed 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 arranged from bottom to top. For example, the magnetic device 7 and the evaporator 4 are both installed on the back plate 101 of the first cavity 1.

[0135] On the other hand, as shown in Figure 10 , under the action of the first fan 5, the air flowing through the condenser 3 flows toward the magnetic device 7. Specifically, the magnetic device 7 and the second cavity air outlet 202 are opposite each other, so that the airflow discharged from the second cavity air outlet 202 dissipates heat from the magnetic device 7. Of course, the magnetic device 7 and the second cavity air inlet 201 can also be opposite each other (see above for details), and the heat dissipation method is not limited to the one shown in Figure 10.

[0136] In the second embodiment, the first fan 5 may be provided or not provided, which is selected according to actual conditions and is not limited in the second embodiment.

[0137] In the second embodiment, other structures of the power conversion device can be referred to above and will not be described again here.

[0138] Example 3

[0139] As shown in FIG. 11 to FIG. 13 , the power conversion device provided in the sixth embodiment differs from the second embodiment mainly in that the heat dissipation of the magnetic device 7 is associated with the evaporator 4 . Specifically, the evaporator 4 is also used to absorb the heat of the magnetic device 7 .

[0140] In the sixth embodiment, the evaporator 4 and the magnetic device 7 are in direct contact or in indirect contact via a heat conducting member.

[0141] The evaporator 4 includes a first evaporation module 401 and a second evaporation module 402 . The first evaporation module 401 is used to absorb heat from the power device 6 , and the second evaporation module 402 is used to absorb heat from the magnetic device 7 .

[0142] On the one hand, as shown in Figures 11 and 12, the first evaporation module 401 and the second evaporation module 402 are different evaporation modules. In this case, as shown in Figure 11, the first evaporation module 401 and the second evaporation module 402 can share the same condenser 3; as shown in Figure 12, the first evaporation module 401 and the second evaporation module 402 can also be connected to different condensers 3.

[0143] The first evaporation module 401 and the second evaporation module 402 may be arranged in parallel, perpendicularly, or in other arrangements, which is not limited in this embodiment.

[0144] On the other hand, as shown in FIG13 , 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 can be distributed on both sides of the evaporation module 403 .

[0145] In the third embodiment, the magnetic device 7 and the evaporator 4 are both exposed outside the first cavity 1 and the second cavity 2. Of course, the magnetic device 7 and the evaporator 4 may be both located inside the fourth cavity 8, the magnetic device 7 may be exposed outside the first cavity 1 and the second cavity 2 and the evaporator 4 may be located inside the first cavity 1, the magnetic device 7 may be exposed outside the first cavity 1 and the second cavity 2 and the evaporator 4 may be located inside the fourth cavity 8, the magnetic device 7 may be located inside the fourth cavity 8 and the evaporator 4 may be located inside the first cavity 1, or the magnetic device 7 and the evaporator 4 may be distributed in other ways.

[0146] Example 4

[0147] As shown in FIG. 14 , the power conversion device provided in the fourth embodiment differs from that in the first embodiment mainly in that the evaporator 4 and the magnetic device 7 are both located in the fourth cavity 8 .

[0148] In this fourth embodiment, for ease of installation, the evaporator 4 can be located at the top or side of the first cavity 1. Accordingly, the magnetic device 7 can be located at the top or side of the first cavity 1. Furthermore, the evaporator 4 and the magnetic device 7 are located on the same side of the first cavity 1. Based on this, the fourth cavity 8 can be located at the side of the first cavity 1. In this case, the second cavity 2 is located at the top of the first cavity 1 and the fourth cavity 8.

[0149] For ease of installation, the fourth cavity 8 may be arranged on the back of the first cavity 1 , that is, the fourth cavity 8 is arranged on the back plate 101 of the first cavity 1 .

[0150] In order to reduce the influence of the airflow in the fourth cavity 8 on the evaporator 4 , the fourth cavity 8 may be provided with an air duct for air to flow through, the air duct flowing through the magnetic device 7 and not through the evaporator 4 .

[0151] As described above, the fourth cavity 8 has a fourth cavity air inlet 801 and a fourth cavity air outlet 802. In order to reduce the impact of the airflow in the fourth cavity 8 on the evaporator 4, it is also possible to select one of the fourth cavity air inlet 801 and the fourth cavity air outlet 802 to be lower than the magnetic device 7 and the other to be higher than the magnetic device 7, so that the magnetic device 7 is lower than the evaporator 4, and the one of the fourth cavity air inlet 801 and the fourth cavity air outlet 802 that is higher than the magnetic device 7 is lower than the top of the evaporator 4.

[0152] Exemplarily, the fourth cavity air inlet 801, the magnetic device 7 and the evaporator 4 are distributed from bottom to top, and the fourth cavity air outlet 802 can be set on the 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 of the evaporator 4.

[0153] In actual situations, the fourth cavity air inlet 801 , the fourth cavity air outlet 802 , the magnetic device 7 and the evaporator 4 may be distributed in other ways, and are not limited to the structure shown in FIG. 14 .

[0154] The second fan 9 may be provided in the fourth cavity 8 or not, depending on the heat dissipation requirements of the magnetic device 7 , and this is not limited in the fourth embodiment.

[0155] In order to facilitate the installation of the second fan 9, the second fan 9 can be located on the side of the magnetic device 7 away from the evaporator 4. The second fan 9 can be inside the fourth cavity 8 or outside the fourth cavity 8.

[0156] In this fourth embodiment, other structures of the power conversion device can be referred to above and will not be described again here.

[0157] Example 5

[0158] As shown in Figures 15 to 17, the power conversion device provided in the fifth embodiment differs from that in the first embodiment mainly in that a fifth cavity 11 is provided, the magnetic device 7 is located in the fifth cavity 11, and the evaporator 4 is located outside the fifth cavity 11 and outside the first cavity 1.

[0159] In this fifth embodiment, the second cavity 2 and the fifth cavity 11 can both be set at the top of the first cavity 1, or the second cavity 2 can be set at the top of the first cavity 1 and the fifth cavity 11 can be set on the side of the first cavity 1, or the second cavity 2 and the fifth cavity 11 can be distributed in positions, which is not limited in this embodiment.

[0160] As described above, the fifth cavity 11 has a fifth cavity air inlet 1101 and a fifth cavity air outlet 1102, so that air can 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 conditions.

[0161] In the fifth embodiment, the third fan 10 may be provided or not provided, depending on the heat dissipation requirement of the magnetic component 7 .

[0162] When the third fan 10 is provided, the third fan 10 is located inside or outside the fifth cavity 11 ; the third fan 10 is located at the air inlet 1101 of the fifth cavity or at the air outlet 1102 of the fifth cavity.

[0163] Since both the second cavity 2 and the fifth cavity 11 require airflow, a shared fan can be selected for the fifth cavity 11 and the second cavity 2 to allow air to flow through the condenser 3 and the magnetic device 7. That is, the condenser 3 and the magnetic device 7 share a shared fan. In this case, the first fan 5 and the third fan 10 mentioned above are the same fan.

[0164] The fifth cavity 11 and the second cavity 2 may share one or more fans, which can be selected based on actual conditions.

[0165] In the fifth embodiment, the fifth cavity 11 and the second cavity 2 share a fan, so that the number of fans can be reduced, thereby simplifying the structure of the power conversion device and reducing the cost of the power conversion device.

[0166] In the case where the fifth cavity 11 and the second cavity 2 share a fan, the fifth cavity 11 and the second cavity 2 may be arranged in parallel or in series.

[0167] When the fifth cavity 11 and the second cavity 2 are arranged in parallel, the fan is located outside the second cavity 2 and also outside the fifth cavity 11. The fifth cavity air inlet 1101 and the second cavity air inlet 201 can be located on the same side. For example, the fan is arranged at the fifth cavity air inlet 1101 and the second cavity air inlet 201. In this way, the air flowing through the fan is divided into two parts, one part flowing through the second cavity 2 and the other part flowing through the fifth cavity 11.

[0168] To facilitate the placement of the fifth cavity air inlet 1101 and the second cavity air inlet 201 on the same side, the second cavity 2 and the fifth cavity 11 are both disposed at the top of the first cavity 1, i.e., the fifth cavity 11 and the second cavity 2 are disposed in parallel. Of course, the fifth cavity 11 may also be disposed at other locations, and this is not limited in this embodiment.

[0169] When the fifth cavity 11 and the second cavity 2 are arranged in series, the fifth cavity 11 is located downstream or upstream of the second cavity 2 .

[0170] In the fifth embodiment, there may be one or more fifth cavities 11. When there are more than two fifth cavities 11, in order to improve the heat dissipation effect of the magnetic device 7, the fifth cavities 11 and the second cavity 2 may be arranged in parallel, that is, every two fifth cavities 11 are also arranged in parallel.

[0171] In the case where there are more than two fifth cavities 11 , the fifth cavities 11 and the second cavities 2 may also be arranged in series, that is, every two fifth cavities 11 are also arranged in series.

[0172] In the case where there are more than two fifth cavities 11 , it is also possible to arrange at least one fifth cavity 11 and the second cavity 2 in parallel, or at least one fifth cavity 11 and the second cavity 2 in series.

[0173] In the case where there are more than two fifth cavities 11 and the fifth cavity 11 and the second cavity 2 are arranged in parallel, all the fifth cavities 11 can be selected to be distributed on at least two sides of the second cavity 2, which facilitates the parallel arrangement of the fifth cavity 11 and the second cavity 2. Of course, all the fifth cavities 11 can also be selected to be distributed on one side of the second cavity 2.

[0174] In the case where there are more than two fifth cavities 11 and the fifth cavity 11 and the second cavity 2 are arranged in series, all the fifth cavities 11 can be selected to be distributed on one side of the second cavity 2, which facilitates the series arrangement of the fifth cavity 11 and the second cavity 2. Of course, all the fifth cavities 11 can also be selected to be distributed on at least two sides of the second cavity 2.

[0175] In this fifth embodiment, other structures of the power conversion device can be referred to above and will not be described again here.

[0176] Example 6

[0177] As shown in FIG. 18 and FIG. 19 , the power conversion device provided in the fifth embodiment differs from that provided in the first embodiment mainly in that the evaporator 4 is located in the first cavity 1 .

[0178] As shown in FIG18 , there is a gap between the evaporator 4 and the inner wall of the first cavity 1. Alternatively, as shown in FIG19 , the evaporator 4 and the inner wall of the first cavity 1 are in contact.

[0179] In the case where there is a gap between the evaporator 4 and the inner wall of the first cavity 1 , electronic devices may be disposed in the gap or may not be disposed in the gap, which is not limited in this embodiment.

[0180] In the sixth embodiment, the magnetic device 7 is disposed in the second cavity 2. Of course, the magnetic device 7 may be exposed outside the first cavity 1 and the second cavity 2, or may be disposed in a cavity other than the second cavity 2.

[0181] In this sixth embodiment, other structures of the power conversion device can be referred to above and will not be described again here.

[0182] In the power conversion device 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. Other combinations can also be selected according to actual conditions, and the embodiment of the present application does not limit this.

[0183] The power conversion device provided in the embodiment of the present application may be an inverter, an energy storage converter or others, and the embodiment of the present application does not limit this.

[0184] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power conversion device, characterized in that, Comprising: A first cavity, a second cavity, and a radiator; Wherein, a power device is disposed 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 supply 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. The power conversion device according to claim 2, characterized in that, A magnetic device is further disposed in the second cavity.

4. The power conversion device according to claim 2, characterized in that, The magnetic device is located at the top of the first cavity.

5. The power conversion device according to claim 2, characterized in that, The magnetic device is located at the side of the first cavity.

6. The power conversion device according to claim 5, characterized in that, 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 devices are 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 2, wherein The magnetic device in the second cavity is a first magnetic device; The power conversion device further includes a third cavity, and a second magnetic device is disposed in the third cavity.

9. The power conversion device according to claim 8, wherein The evaporator is located in the third cavity; And / or, the third cavity can supply air to flow through the second magnetic device to cool the second magnetic device.

10. The power conversion device according to claim 2, characterized in that, A magnetic device is further disposed outside the second cavity and outside the first cavity.

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

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

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

15. The power conversion device according to claim 10, characterized in that, It further includes a fourth cavity, and the evaporator is located in the fourth cavity.

16. The power conversion device according to claim 9 or 15, characterized in that, The evaporator is located at the top or side of the first cavity.

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

18. The power conversion device according to claim 17, characterized in that, The fourth cavity can supply air to flow through the magnetic device to cool the magnetic device.

19. The power conversion device according to claim 18, wherein The fourth cavity has an air duct for air to flow through. The air duct flows through the magnetic device and does not flow through the evaporator; And / or, one of the air inlet and 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 the one of the air inlet and air outlet of the fourth cavity that is higher than the magnetic device is lower than the top end of the evaporator; And / or, a fan is disposed in the fourth cavity, and the fan is located on the side of the magnetic device away from the evaporator.

20. The power conversion device according to claim 10, characterized in that, It further includes a fifth cavity, where the magnetic device is located, and the fifth cavity allows 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 enable 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, characterized in that, The fifth cavity and the second cavity are arranged in parallel or in series.

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

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

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