CN220368942U

CN220368942U - Inverter

Info

Publication number: CN220368942U
Application number: CN202321388393.9U
Authority: CN
Inventors: 范豪凯
Original assignee: Vitesco Automotive Tianjin Co Ltd
Current assignee: Vitesco Automotive Tianjin Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2024-01-19
Anticipated expiration: 2033-06-02

Abstract

The utility model discloses an inverter, comprising: a housing and a thermally conductive substrate; the bottom of the shell is provided with a cooling channel with an opening, and a liquid inlet pipeline and a liquid outlet pipeline which are communicated with the cooling channel are arranged outside the shell; the lower surface of the heat conduction substrate covers the opening of the cooling channel to form a sealed cooling cavity, external cooling medium can directly flow into the cooling cavity through the liquid inlet pipeline and then flow out of the cooling cavity through the liquid outlet pipeline, and the upper surface of the heat conduction substrate is used for being connected with a heating element. The inverter has the advantages of simple and concentrated heat dissipation structure, simple process, lower cost, small pressure loss and better heat dissipation performance, and can effectively save the occupied space of the heat dissipation structure.

Description

Inverter

Technical Field

The utility model relates to the technical field of power electronics, in particular to an inverter.

Background

The inverter is a core component of the new energy automobile, can convert direct-current energy from a high-voltage battery or a direct-current link bus into alternating-current energy for driving a three-phase synchronous motor, and plays a role in the performance, safety and reliability of the new energy automobile. The inverter usually adopts the design of a high-power module, and after the power module and other heating elements work for a long time, higher heat accumulation can be generated, so that the performance and the service life of components are reduced.

At present, the new energy automobile inverter usually adopts water cooling heat dissipation, and in the automobile field, the cooling mode has better heat dissipation performance. However, the existing water cooling structure of the inverter generally comprises a plurality of parts, which results in complex water cooling structure of the inverter and large occupied space, thereby resulting in high material and production cost and complex process.

Disclosure of Invention

The utility model aims to solve the problems of complex structure, large occupied space, high material and production cost, large pressure loss and high leakage risk of the traditional water-cooling radiator in the inverter. The utility model provides an inverter which has the advantages of simple and concentrated heat dissipation structure, simple process, lower cost, small pressure loss and better heat dissipation performance, and can effectively save occupied space.

To solve the above technical problems, an embodiment of the present utility model discloses an inverter, including:

the cooling device comprises a shell, wherein the bottom of the shell is provided with a cooling channel with an opening, and a liquid inlet pipeline and a liquid outlet pipeline which are communicated with the cooling channel are arranged outside the shell;

the lower surface of the heat conduction substrate is covered on the opening of the cooling channel to form a sealed cooling cavity, external cooling medium can directly flow into the cooling cavity through the liquid inlet pipeline and then flow out of the cooling cavity through the liquid outlet pipeline, and the upper surface of the heat conduction substrate is used for being connected with a heating element.

By adopting the technical scheme, the cooling channel is directly formed on the shell of the inverter, so that the structure of the inverter is simplified, the occupied space is effectively reduced, the production cost is reduced, and the heat dissipation process is easier to realize; the problem that the cooling medium stays in the water channel for a long time due to the long cooling circuit of the external water channel is solved, the heat dissipation performance is effectively improved, and the service lives of the heating element and the inverter are prolonged; meanwhile, the heat conducting substrate is covered on the top of the cooling channel in a sealing way, so that the high leakage risk brought by the sealing ring can be effectively avoided, and the safety of the inverter is improved.

According to another embodiment of the utility model, the housing comprises a bottom plate and a side wall, the cooling channel is arranged on the bottom plate, and the liquid inlet pipeline and the liquid outlet pipeline are arranged on the side wall;

the bottom plate is provided with a partition block which divides the cooling channel into a first cooling channel and a second cooling channel which are communicated with each other;

the upper surface of the heat conducting substrate comprises a first heat dissipation area and a second heat dissipation area which correspond to the first cooling channel and the second cooling channel respectively, the first heat dissipation area is used for being connected with a first heating element, the second heat dissipation area is used for being connected with a second heating element, and the heating value of the first heating element is smaller than that of the second heating element.

By adopting the technical scheme, the cooling channels are arranged in a separated mode, and the heat conducting base plates are arranged in a separated mode so as to correspond to heating elements with different heating values, so that the water cooling and heat dissipation performance of the inverter can be optimized in a targeted mode, and the degree of freedom of heat dissipation process design is improved; meanwhile, the flexibility of the arrangement of the internal structure of the inverter can be improved, so that the research and development period is shortened, the cost is reduced, and the effectiveness of the inverter is improved.

Meanwhile, the first cooling channel and the second cooling channel are arranged at intervals through the partition blocks, the first heating element with lower heating value is connected to the first heat dissipation area corresponding to the first cooling channel in a targeted manner, the second heating element with high heating value is connected to the second heat dissipation area corresponding to the second cooling channel, at the moment, the temperature rise of the cooling medium after flowing through the first heat dissipation area is lower, and then the second heating element with high power in the second heat dissipation area is subjected to heat dissipation, so that the whole inverter is uniformly cooled, and the heat dissipation effect is effectively improved.

According to another specific embodiment of the utility model, the liquid inlet pipeline and the liquid outlet pipeline are arranged on the side wall of the same side of the shell, the liquid inlet pipeline is communicated with the first cooling channel, and the liquid outlet pipeline is communicated with the second cooling channel; one end of the partition block is arranged with the inner wall of the cooling channel, which is far away from the liquid inlet pipeline along the first direction, so as to form a converging channel, and the first cooling channel is communicated with the second cooling channel through the converging channel.

By adopting the technical scheme, the liquid inlet pipeline and the liquid outlet pipeline adopt the same-side arrangement mode, so that the flow speed of the cooling medium can be increased, and the heat dissipation performance is improved. The cooling channel is provided with the partition block with a simple structure, so that the cooling channel can be divided into two channels which are communicated with each other, and the heating elements with different powers can be subjected to targeted heat dissipation; on the other hand, the partition block has better fluid guiding capability, and can guide the flowing trend of the cooling medium by combining the converging channels, so that the first cooling channel and the second cooling channel respectively form reasonable pressure drop, turbulent flow formed by a single channel can be avoided, and the optimization of heat dissipation performance is facilitated.

According to another embodiment of the utility model, a flow conductor is arranged in the cooling channel.

By adopting the technical scheme, the guide body is arranged in the cooling channel, so that the guiding effect on the cooling medium can be enhanced, and the heat dissipation performance of the first heating element and the second heating element of the inverter can be further improved.

According to another specific embodiment of the present utility model, the flow guiding body includes a flow guiding rib, the flow guiding rib is disposed in the first cooling channel, an extending direction of the flow guiding rib is consistent with a direction in which the cooling medium flows into the first cooling channel, and the flow guiding rib and the first cooling channel extend in a transverse direction.

By adopting the technical scheme, the flow guide ribs can effectively prevent the cooling medium in the first cooling channel from generating turbulence, thereby preventing a high-temperature island from being formed due to the turbulence and effectively improving the heat dissipation capacity of the first cooling channel; the cooling medium flows into the first cooling channel from the liquid inlet pipeline, the cooling medium can be split up and down in the first cooling channel through the guide ribs extending transversely, and the split cooling medium flows into the second cooling channel through the converging channel, so that the flow resistance of the cooling medium is effectively reduced, and the heat dissipation performance of the first cooling channel is improved.

According to another embodiment of the present utility model, the fluid guiding body includes a plurality of fluid guiding separators disposed in the second cooling channel, the plurality of fluid guiding separators are disposed in parallel with each other and are disposed in a staggered manner up and down, and the plurality of fluid guiding separators are disposed between inner walls of the second cooling channel extending toward the liquid outlet pipe, so as to divide the second cooling channel into a plurality of fluid turning channels.

By adopting the technical scheme, the arrangement mode of the plurality of flow guide baffles can play a role in guiding fluid and prevent turbulence, so that the cooling performance of the second cooling channel is optimized; the second cooling channel is divided into a plurality of fluid turning channels by the flow guide partition plates, so that the longitudinal heat dissipation area of the second cooling channel can be increased, and the heat dissipation effect of the second heat dissipation area is enhanced.

According to another embodiment of the present utility model, the cooling channel includes a first inner sidewall, a second inner sidewall, a third inner sidewall and a fourth inner sidewall that are connected, the liquid inlet pipe and the liquid outlet pipe penetrate through the first inner sidewall, the first inner sidewall and the second inner sidewall are oppositely disposed along the first direction, and the third inner sidewall and the fourth inner sidewall are oppositely disposed along the second direction;

the partition block is positioned between the third inner side wall and the fourth inner side wall along the second direction, the partition block comprises a first side surface and a second side surface, the first side surface is opposite to the third inner side wall along the second direction, and the second side surface is opposite to the fourth inner side wall along the second direction;

the inner wall of the cooling channel far away from the liquid inlet pipeline is the second inner side wall, and the inner wall of the second cooling channel extending towards the liquid outlet pipeline is the fourth inner side wall and the second side surface;

the inner wall of the first cooling channel includes the third inner sidewall, the first side surface, a portion of the first inner sidewall, and a portion of the second inner sidewall, and the inner wall of the second cooling channel includes the fourth inner sidewall, the second side surface, a portion of the first inner sidewall, and a portion of the second inner sidewall.

According to another embodiment of the utility model, the lower surface of the heat conducting substrate is provided with a plurality of flow guiding columns.

By adopting the technical scheme, the plurality of flow guide columns on the lower surface of the heat conduction substrate are in contact with the cooling medium in the cooling channel, so that the heat transfer area of the cooling channel can be increased, the flow resistance is reduced, and the heat dissipation effect can be greatly improved by combining with the cooling channel, thereby improving the safety of the inverter and prolonging the service life of the inverter.

According to another embodiment of the utility model, the guide post is in contact with the bottom wall of the cooling channel.

According to another embodiment of the present utility model, a plurality of the flow guiding columns are disposed on a portion of the lower surface of the heat conducting substrate corresponding to the second cooling channel.

By adopting the technical scheme, the flow guide column is arranged in the second cooling channel, so that the heat radiation capacity of the second cooling channel can be effectively improved, the heat radiation effect of the second heating element with larger heat productivity is optimized, and the whole inverter is uniformly cooled.

Drawings

FIG. 1a shows an exploded perspective view of an inverter according to an embodiment of the present utility model; wherein, external water course 2 'is located the outside of heat dissipation module 3'.

Fig. 1b shows a perspective view of an inverter according to an embodiment of the utility model.

Fig. 2 shows a second perspective exploded view of the inverter according to the embodiment of the present utility model.

Fig. 3 shows a second perspective view of an inverter according to an embodiment of the utility model.

Fig. 4 shows a third perspective view of an inverter according to an embodiment of the utility model; wherein the heat conducting substrate 2 is covered on the cooling channel 3 forming a sealed cooling cavity S.

Fig. 5 shows a front view of an inverter according to an embodiment of the present utility model.

Fig. 6 illustrates a bottom view of a thermally conductive substrate in an inverter according to an embodiment of the utility model.

Fig. 7 shows a bottom exploded view of an inverter according to an embodiment of the utility model.

Fig. 8 shows a bottom perspective view of an inverter according to an embodiment of the utility model.

In the figure: 1' an inverter housing; 2', an external water channel; 3', a heat dissipation module; 4', a sealing ring; a 5' transfer water pipe; 1. a housing; 11. a bottom plate; 112. a partition block; 1121. a first side; 1122. a second side; 113. a flow guide body; 1131. a flow guiding rib; 1132. a baffle plate; 12. a sidewall; 121. a liquid inlet pipe; 122. a liquid outlet pipe; 2. a thermally conductive substrate; 21. an upper surface; 211. a first heat dissipation area; 212. a second heat dissipation area; 22. a lower surface; 23. a flow guiding column; 3. a cooling channel; 31. a first cooling channel; 32. a second cooling channel; 33. a first inner sidewall; 34. a second inner sidewall; 35. a third inner sidewall; 36. a fourth inner sidewall; s, cooling the cavity; A. a confluence channel; t, fluid turning channel; ts, straight section; tb, bending section.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

In some embodiments, referring to fig. 1a and 1b, fig. 1a shows a first perspective view of a water cooling structure of an inverter, and fig. 1b shows a second perspective view of the water cooling structure of the inverter.

As shown in fig. 1a and 1b, the water cooling structure of the inverter includes parts such as an inverter housing 1', an external water channel 2', a heat dissipation module 3', a sealing ring 4', a transmission water pipe 5', etc., and it can be seen that the water cooling structure shown in fig. 1a and 1b is complex, and occupies a large space, thereby resulting in high material and production costs and complex production processes.

As shown in fig. 1b, the external water channel 2 'is installed on the side surface of the heat dissipation module 3', the cooling medium enters the external water channel 2 'through the transmission water pipe 5', flows in the external water channel 2 'for a period of time and a certain distance, and then flows into the heat dissipation module 3', so that the cooling circuit is too long, and a certain pressure loss is generated, and the heat dissipation effect is poor.

In addition, the external water channel 2' shown in fig. 1a and fig. 1b is a structure (i.e. a curve structure) with one side feeding liquid and the bottom discharging liquid, so that when the pressure loss is generated due to the overlong cooling circuit, the cooling medium changes direction in the external water channel 2', and flows downwards and flows into the heat dissipation module 3 '. That is, the cooling medium is more dependent on the structure (such as direction, flow velocity, angle, etc.) of the external water channel 2' in three processes of entering the external water channel 2', flowing through the external water channel 2', flowing out of the external water channel 2', and then entering the heat dissipation module 3', so that the pressure drop is easily increased.

Further, as shown in fig. 1a, between the external water channel 2 'and the transmission water pipe 5', between the external water channel 2 'and the heat dissipation module 3', between the heat dissipation module 3 'and the inverter housing 1', the sealing rings 4 'are all adopted to perform single-layer connection, so that the sealing performance is poor, and after long-time use, the aging, abrasion and deformation phenomena of the sealing rings 4' are extremely likely to occur, and a higher risk of leakage of cooling medium exists, so that components and circuits inside the inverter are damaged.

Therefore, the embodiment of the application provides another inverter structure, and the cooling channel is directly formed in the shell of the inverter, so that the structure of the inverter is simplified, the occupied space is effectively reduced, the production cost is reduced, and the heat dissipation process in the inverter is easier to realize. The cooling channel and the heat conducting substrate covered on the top of the cooling channel play roles in cooling and heat transfer simultaneously and jointly act on the heating element connected to the heat conducting substrate, so that the cooling channel has good heat dissipation performance, and the risk of leakage of cooling medium due to the adoption of the sealing ring is avoided.

Specifically, referring to fig. 2 and 3, in an embodiment of the present application, an inverter includes: the shell 1 and the heat conduction base plate 2, the bottom of the shell 1 is directly provided with an upward opening cooling channel 3, the outside of the shell 1 is provided with a liquid inlet pipeline 121 and a liquid outlet pipeline 122 which are communicated with the cooling channel 3, and external cooling medium (such as water) can directly flow into the cooling channel 3 through the liquid inlet pipeline 121 and then flow out through the liquid outlet pipeline 122.

In the embodiment shown in fig. 1a and 1b, the cooling medium needs to flow through the external water channel 2' installed on the side surface of the heat dissipation module 3' and then enter the heat dissipation module 3' through the external water channel 2', so that the cooling circuit is too long (i.e. the cooling medium does not directly enter the heat dissipation module 3 '), and the heat dissipation effect is poor.

The heat radiation structure of the inverter is not provided with an external water channel, but the shell 1 of the inverter is provided with the cooling channel 3, and the cooling medium directly flows into the cooling channel 3 to radiate heat, so that the problem that the cooling medium stays in the water channel for a long time due to overlong cooling lines is solved, the heat radiation performance is effectively improved, and the service lives of the heating element and the inverter are prolonged.

Referring to fig. 4 in combination with fig. 2 and 3, the heat conducting substrate 2 is located at the top of the cooling channel 3, the lower surface 22 of the heat conducting substrate 2 is covered at the opening of the cooling channel 3, a sealed cooling cavity S (located below the heat conducting substrate 2 in fig. 4) can be formed with the cooling channel 3, a heating element (such as a power module and a capacitor) in the inverter, which needs to dissipate heat, is installed on the upper surface 21 of the heat conducting substrate 2, and heat generated by the heating element is conducted to a cooling medium in the cooling cavity S through the heat conducting substrate 2, and the cooling medium circulates according to the working path, so that effective heat dissipation is achieved.

The heat conducting substrate 2 of the inverter is covered on the top of the cooling channel 3 in a sealing manner, the heat conducting substrate 2 and the cooling channel 3 can directly and synchronously dissipate heat, the cooling circuit is short, and pressure loss can be avoided; in addition, the cooling medium is not influenced by the structure of the external water channel, and the pressure drop is not easy to rise. Therefore, the inverter disclosed by the embodiment of the application has better heat dissipation performance, and the service lives of the heating element and the whole inverter can be prolonged.

Meanwhile, the heat conducting substrate 2 is covered on the top of the cooling channel 3 in a sealing way, so that the problem that the sealing ring 4' brings high leakage risk in the embodiment can be effectively avoided, and the safety of the inverter is improved.

The inverter of this application embodiment only adopts and offers cooling channel 3 in casing 1 bottom, covers the heat conduction base plate 2 at cooling channel 3 top and dispels the heat, has reduced the part of inverter heat radiation structure for the structure of inverter is simplified, has effectively reduced occupation space, reduction in production cost, makes the radiating process more easily realize.

The connection mode of the heat conducting substrate 2 and the cooling channel 3 is not limited in this embodiment, and all that is required is to realize sealing connection.

For example, as shown in fig. 4, the lower surface of the heat conducting substrate 2 may be directly welded at the opening of the cooling channel by friction stir welding, so as to form the sealed cooling cavity S, thereby forming an integrated heat dissipation structure.

In some possible embodiments, the heat conducting base plate 2 and the cooling channels may also be connected by means of powder metallurgical brazing.

For example, the heat conducting substrate 2 may be an aluminum alloy heat conducting substrate, or a metal-based heat conducting substrate such as copper or steel, which is a substrate having heat conducting properties, and falls within the scope of the present application.

Referring to fig. 3, the housing 1 includes a bottom plate 11 and side walls 12. The housing 1 may be square, rectangular, trapezoid, or the like as shown in fig. 3, and is within the scope of the present application as long as the layout of the elements and the circuit design of the inverter can be realized. The bottom plate 11 is used for installing inverter electronic elements, and the cooling channel 3 is directly arranged on the bottom plate 11; the side wall 12 is used for connecting a protective cover plate, and the liquid inlet pipeline 121 and the liquid outlet pipeline 122 are arranged on the side wall 12 in a penetrating way.

Illustratively, the liquid inlet pipe 121 and the liquid outlet pipe 122 may be mounted on the same side wall (such as the leftmost side wall shown in fig. 3), and the specific connection positions of the two may be set according to the actual liquid inlet and outlet requirements, depending on the shape design, depth, and other factors of the cooling channel 3.

With continued reference to fig. 3, the cooling passage 3 includes a first cooling passage 31 and a second cooling passage 32 partitioned by a partition block 112, the partition block 112 being provided on the base plate 11, the first cooling passage 31 and the second cooling passage 32 communicating with each other. Illustratively, one end of the partition block 112 is spaced apart from the inner wall of the cooling channel 3 away from the liquid inlet pipe 121 in the first direction (X direction shown in fig. 3) to form a converging channel a (e.g., an area indicated by a dashed circle in fig. 3), one end of the first cooling channel 31 is communicated with the liquid inlet pipe 121, the cooling medium directly flows into the first cooling channel 31 through the liquid inlet pipe 121, the other end of the first cooling channel 31 is communicated with the second cooling channel 32 through the converging channel a, one end of the second cooling channel 32 away from the converging channel a is communicated with the liquid outlet pipe 122, and the cooling medium flows out of the housing 1 through the liquid outlet pipe 122 after being guided to flow into the second cooling channel 32 through the converging channel a.

Referring to fig. 4, the heat-conducting substrate 2 includes a first heat dissipation area 211 and a second heat dissipation area 212, wherein the first heat dissipation area 211 corresponds to the top of the first cooling channel 31, and the second heat dissipation area 212 corresponds to the top of the second cooling channel 32. The first heat dissipation area 211 is used for connecting a first heat generation element (not shown) with a smaller heat generation amount, and the second heat dissipation area 212 is used for connecting a second heat generation element (not shown) with a larger heat generation amount.

For example, the first heating element may be a capacitor, and it should be emphasized that the first heating element may be also applicable to a large-capacitance module, and the second heating element may be a power module.

In the inverter disclosed by the embodiment of the application, the cooling channels 3 are separated, and the heat conducting substrate 2 is arranged in a partition mode so as to correspond to heating elements with different powers, so that the water cooling heat dissipation performance of the inverter can be optimized in a targeted manner, and the degree of freedom of heat dissipation design is improved; the flexibility of the arrangement of the internal structure of the inverter can be improved, so that the research and development period is shortened, the cost is reduced, and the effectiveness of the inverter is improved.

Referring to fig. 3 and 4, further, the first cooling channel 31 and the second cooling channel 32 are separated by the separating block 112, meanwhile, the first heating element with lower heat productivity is connected to the first heat dissipation area 211 corresponding to the first cooling channel 31 in a targeted manner, the second heating element with higher heat productivity is connected to the second heat dissipation area 212 corresponding to the second cooling channel 32, at this time, the temperature rise of the cooling medium after flowing through the first heat dissipation area 211 is lower, and then the heat dissipation is performed to the second heating element with higher power in the second heat dissipation area 212, so that the whole cooling of the inverter is uniform, and the heat dissipation effect is effectively improved.

For example, please continue to refer to fig. 3 and 4, the liquid inlet pipe 121 and the liquid outlet pipe 122 are installed on the side wall 12 on the same side, and the liquid inlet pipe 121 is located at the lower side (the side indicated by the n direction shown in fig. 3) of the liquid outlet pipe 122, and accordingly, the first cooling channel 31 corresponding to the liquid inlet pipe 121 and the second cooling channel 32 corresponding to the liquid outlet pipe 122 are separately disposed from bottom to top, that is, the first cooling channel 31 is disposed at the lower side of the bottom plate 11, and the second cooling channel 32 is located at the upper side (the side indicated by the m direction shown in fig. 3) of the first cooling channel 31.

Since the first heat generating element (for example, a capacitor) is connected to the first heat dissipating region 211 corresponding to the first cooling channel 31 and the heat generation amount of the second heat generating element (for example, an IGBT) is large, the heat generation power of the first heat generating element is lower than that of the second heat generating element, so that the temperature of the cooling medium is lower when passing through the corresponding first cooling channel 31, and the cooling medium can be purposefully applied to the second heat dissipating region 212 when the temperature of the cooling medium is lower, so as to conduct heat to the second heat generating element. If the cooling medium flows into the second cooling channel 32 corresponding to the second heating element, the temperature of the cooling medium increases, and the heat of the first heating element, especially the large capacitor module, cannot be well dissipated.

In other possible embodiments, the first cooling channel 31 may be connected to the liquid outlet pipe 122, and the second cooling channel 32 may be connected to the liquid inlet pipe 121, that is, the cooling medium flows into the second cooling channel 32 corresponding to the second heating element, and then the shape design of the cooling channel 3 is adjusted by combining with the simulation analysis to ensure the heat dissipation of the first heating element, so that the inverter in the embodiment of the present application does not limit the liquid inlet sequence of the first cooling channel 31 and the second cooling channel 32.

Still taking the example that the first cooling channel 31 is connected to the liquid inlet pipe 121, with continued reference to fig. 3, according to the above description, the first cooling channel 31 and the second cooling channel 32 are partitioned by the partition block 112, and the following description will be made on this partition manner.

Specifically, referring to fig. 5, the cooling channel 3 includes a first inner sidewall 33, a second inner sidewall 34, a third inner sidewall 35, and a fourth inner sidewall 36, and as shown in fig. 5, the first inner sidewall 33 is near a side of the sidewall 12 connected to the liquid inlet pipe 121 and the liquid outlet pipe 122, and the liquid inlet pipe 121 and the liquid outlet pipe 122 penetrate the first inner sidewall 33.

The second inner sidewall 34 is far away from the liquid inlet pipe 121 and is opposite to the first inner sidewall 33 along the X direction shown in fig. 5; it can be seen that the inner wall of the cooling channel 3 far from the liquid inlet pipe 121 along the X direction is the second inner wall 34.

The third inner sidewall 35 is located between the first inner sidewall 33 and the second inner sidewall 34, and both ends thereof are connected to the first inner sidewall 33 and the second inner sidewall 34, and the fourth inner sidewall 36 and the third inner sidewall 35 are disposed opposite in the second direction (Y direction shown in fig. 5) and are also connected between the first inner sidewall 33 and the second inner sidewall 34.

In the Y direction shown in fig. 5, the partition block 112 is located between the third inner side wall 35 and the fourth inner side wall 36, and includes a first side face 1121 and a second side face 1122, the first side face 1121 being disposed opposite the third inner side wall 35 in the direction, and the second side face 1122 being disposed opposite the fourth inner side wall 36 in the direction.

Thus, the first, second, third and fourth inner side walls 33, 34, 35 and 36 enclose an inner wall of the whole cooling channel 3 for accommodating the cooling medium and restricting, influencing the flow thereof.

Wherein the inner wall of the first cooling channel 31 comprises a third inner side wall 35, a first side 1121, a portion of the first inner side wall 33, a portion of the second inner side wall 34. Illustratively, the third inner sidewall 35 and the first side 1121 extend in the direction e shown in fig. 5, and a portion of the first inner sidewall 33 is connected between the third inner sidewall 35 and the first side 1121 to form a first cooling channel 31 having one end closed (i.e., a portion of the first inner sidewall 33 in fig. 5) and one end open (i.e., a portion between a portion of the second inner sidewall 34 and the first side 1121 in fig. 5, which communicates with the confluence channel a).

The inner wall of the second cooling gallery 32 includes a fourth inner side wall 36, a second side 1122, another portion of the first inner side wall 33, another portion of the second inner side wall 34. The fourth inner side wall 36 and the second side 1122 extend in the direction f shown in fig. 5, and the other portion of the first inner side wall 33 is connected therebetween to form a second cooling passage 32 having one end opened (i.e., a portion between the other portion of the second inner side wall 34 and the second side 1122 in fig. 5, which communicates with the confluence passage a) and one end closed (i.e., the other portion of the first inner side wall 33 in fig. 5).

Through the above structure arrangement, the partition block 112 can separate the cooling channels 3 on one hand, and partition the heat conducting substrate 2 so as to correspond to heating elements with different powers, thereby pertinently optimizing the water cooling heat dissipation performance of the inverter, and enabling the inverter to be uniformly cooled on the whole, and effectively improving the heat dissipation effect. On the other hand, the flow trend of the cooling medium can be guided, the problem that turbulence is easy to form in a single channel is avoided, and the optimization of heat dissipation performance is facilitated.

For example, referring to fig. 3 and 5, the liquid inlet pipe 121 and the liquid outlet pipe 122 are disposed on the side wall 12 on the same side of the housing 1, and one end of the partition block 112 is spaced from the second inner side wall 34 to form a converging channel a through which the first cooling channel 31 communicates with the second cooling channel 32.

With this structure, the cooling medium flows into the first cooling passage 31 through the liquid inlet pipe 121 in the direction e shown in fig. 3 or 5 until flowing into the merging passage a, changes the flow direction at a certain angle in the merging passage a, flows to the head end described above of the second cooling passage 32, flows out through the liquid outlet pipe 122 in the direction f shown in fig. 3 or 5 in the second cooling passage 32.

The angle is not limited in this embodiment, and is selected according to the positions of the liquid inlet pipe 121 and the liquid outlet pipe 122, the overall shape and the internal design of the cooling channel 3 and/or the converging channel a, the heat dissipation simulation analysis, the actual application requirements, and the like, so long as the requirements of liquid inlet and outlet and heat dissipation are met, which all belong to the protection scope of the embodiment of the present application.

In one possible embodiment, referring to fig. 3 and 5, the liquid inlet pipe 121 and the liquid outlet pipe 122 are still installed on the same side wall 12, but the liquid inlet pipe 121 is located at the upper side (the side indicated by the direction m in fig. 3) of the liquid outlet pipe 122, at this time, the first cooling channel 31 and the second cooling channel 32 are disposed at intervals from top to bottom, and the cooling medium flows from the liquid inlet pipe 121 at the upper side into the first cooling channel 31, then flows to the second cooling channel 32 at the lower side (the side indicated by the direction n in fig. 3), and finally flows out through the liquid outlet pipe 122 connected to the second cooling channel 32.

In other possible embodiments, referring to fig. 3 and 5, the liquid inlet pipe 121 and the liquid outlet pipe 122 may also be installed on the side walls 12 on different sides, and accordingly, the first cooling channel 31 and the second cooling channel 32 may also be disposed from bottom to top or from top to bottom. The installation positions of the liquid inlet pipe 121, the liquid outlet pipe 122, the first cooling channel 31 and the second cooling channel 32 are not limited, and can be adjusted and selected according to actual simulation results.

With continued reference to fig. 3, a flow guide 113 is disposed in the cooling passage 3.

Illustratively, the flow director 113 includes flow ribs 1131 disposed in the first cooling channel 31, and the flow ribs 1131 extend in a direction that is consistent with the flow direction of the cooling medium in the first cooling channel 31. The flow guiding ribs 1131 can effectively prevent the cooling medium from generating turbulence, thereby preventing the cooling channel 3 from forming a high temperature island due to the turbulence, and effectively improving the heat dissipation capacity of the first heat dissipation area 211.

In one possible embodiment, the entire extension direction of the flow rib 1131 is completely parallel to the flow direction of the cooling medium in the first cooling channel 31. Illustratively, referring to fig. 3, the flow rib 1131 and the first cooling channel 31 each extend in a lateral direction (X direction shown in fig. 3), and fig. 3 shows that the flow rib may have a shape of a letter, and its overall extending direction is parallel to the X direction shown in fig. 3.

In other possible embodiments, the extending direction of the flow guiding rib 1131 forms a certain extending angle (for example, 5 °, 10 °, 15 °, etc.) with the flow direction of the cooling medium in the first cooling channel 31 (for example, along the e direction shown in fig. 3), but the extending angle needs to achieve the flow splitting of the cooling medium by the flow guiding rib 1131 and can cooperate with the converging channel a to perform the guiding function.

Referring to fig. 3 and 5, the flow guiding body 113 further includes a plurality of flow guiding partitions 1132 disposed in the second cooling channel 32, and the plurality of flow guiding partitions 1132 are parallel to each other and are connected to the second side 1122 and the fourth inner sidewall 36 in an up-down staggered manner, so that the second cooling channel 32 can be divided into a plurality of fluid turning channels T, the cooling medium can flow to the liquid outlet pipe 122 along the Y direction shown in fig. 3 in the flat section Ts of the fluid turning channels T, and the cooling medium can flow in the longitudinal direction (m direction shown in fig. 3 and downward direction (n direction shown in fig. 3) at the bending section Tb of the fluid turning channels T, at this time, the longitudinal length of the second cooling channel 32 can be effectively increased, thereby increasing the longitudinal heat dissipation area of the second heat dissipation area 212 and further enhancing the heat dissipation effect of the second heat dissipation area 212.

Referring to fig. 6, 7 and 8 in combination with fig. 3, a plurality of flow guiding posts 23 are disposed on the lower surface of the heat conducting substrate 2.

Illustratively, when the bottom surface of the flow guiding pillar 23 contacts with the bottom wall surface of the cooling channel 3 and the lower surface 22 of the heat conducting substrate 2 covers the opening of the cooling channel 3, the heat guiding pillar 23 on the lower surface of the heat conducting substrate 2 is located in the cooling cavity S and can contact with the cooling medium, so as to increase the heat transfer area of the cooling channel 3, reduce the flow resistance, and greatly improve the heat dissipation effect in combination with the cooling channel 3.

As shown in fig. 6, a plurality of flow guiding columns 23 are disposed on the lower surface of the heat conducting substrate 2 corresponding to the second cooling channel 32, so as to effectively improve the heat dissipation capacity of the second cooling channel 32, further optimize the heat dissipation effect of the second heating element with larger heat generation amount, and make the overall cooling of the inverter uniform.

In a possible embodiment, the flow guiding columns 23 are cylindrical (such as pinfin structure), are connected to the lower surface of the heat conducting substrate 2, and are located in the cooling cavity S shown in fig. 4 corresponding to the second cooling channel 32. The flow guide posts 23 can increase the heat dissipation area of the second heat dissipation area 212, and further improve the heat dissipation performance of the second heat dissipation area 212.

In one possible embodiment, the diameter Φ of the guide post 23 is 3.5mm, but the embodiment of the present application does not limit the diameter of the guide post 23, so long as the requirement of increasing the heat dissipation effect can be met, and all embodiments belong to the protection scope of the present application.

Illustratively, the flow guiding studs 23 are arranged only in the first cooling channels 31, i.e. the flow guiding studs 23 are arranged at the lower surface of the thermally conductive substrate 2 at the portions corresponding to the first cooling channels 31. For example, the flow guiding studs 23 may also be arranged in the first cooling channel 31 and the second cooling channel 32, i.e. the flow guiding studs 23 are arranged on the entire bottom surface of the heat conducting substrate 2, and the heat dissipation of the first cooling channel 31 and the second cooling channel 32 may be optimized at the same time.

It should be noted that, the shape, the size, the position, the angle and the like of the guide rib, the guide partition plate and the guide column are not limited in the embodiment of the application, and the components capable of guiding the cooling medium and optimizing the heat dissipation effect of the first heat dissipation area and the second heat dissipation area belong to the protection scope of the application.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims

1. An inverter, comprising:

2. The inverter of claim 1, wherein,

the shell comprises a bottom plate and a side wall, the cooling channel is arranged on the bottom plate, and the liquid inlet pipeline and the liquid outlet pipeline are arranged on the side wall;

3. The inverter according to claim 2, wherein the liquid inlet pipe and the liquid outlet pipe are provided on the side wall of the same side of the housing, the liquid inlet pipe being in communication with the first cooling passage, the liquid outlet pipe being in communication with the second cooling passage; one end of the partition block is arranged with the inner wall of the cooling channel, which is far away from the liquid inlet pipeline along the first direction, so as to form a converging channel, and the first cooling channel is communicated with the second cooling channel through the converging channel.

4. An inverter according to claim 3, wherein a flow conductor is provided in the cooling channel.

5. The inverter according to claim 4, wherein the flow guide body includes a flow guide rib provided in the first cooling passage, an extending direction of the flow guide rib being identical to a direction in which the cooling medium flows into the first cooling passage, the flow guide rib and the first cooling passage extending in a lateral direction.

6. The inverter according to claim 4, wherein the fluid guide body includes a plurality of fluid guide separators disposed in the second cooling channel, the plurality of fluid guide separators being disposed in parallel with each other and being disposed in a vertically staggered manner, the plurality of fluid guide separators being disposed between inner walls of the second cooling channel extending toward the liquid outlet pipe, and being capable of dividing the second cooling channel into a plurality of fluid turning channels.

7. The inverter of claim 6, wherein

The cooling channel comprises a first inner side wall, a second inner side wall, a third inner side wall and a fourth inner side wall which are connected, the liquid inlet pipeline and the liquid outlet pipeline penetrate through the first inner side wall, the first inner side wall and the second inner side wall are oppositely arranged along the first direction, and the third inner side wall and the fourth inner side wall are oppositely arranged along the second direction;

8. The inverter according to any one of claims 1 to 7, wherein a lower surface of the heat conductive substrate is provided with a plurality of guide posts.

9. The inverter of claim 8, wherein the deflector column is in contact with a bottom wall of the cooling channel.

10. The inverter according to claim 8, wherein a plurality of the guide posts are provided at a portion of the lower surface of the heat conductive substrate corresponding to the second cooling passage.