CN221176211U - Heat radiation structure, power module and motor controller - Google Patents

Abstract

The utility model discloses a heat radiation structure, a power module and a motor controller, wherein the heat radiation structure comprises: the inner cavity is provided with a heat dissipation cavity with a heat dissipation flow channel, and a cavity inlet and a cavity outlet are respectively arranged on the heat dissipation cavity; the heat dissipation fins are arranged in the heat dissipation flow channels, the number of the heat dissipation fins is multiple, and the heat dissipation fins are sequentially arranged at intervals along the width direction of the heat dissipation flow channels so as to divide the heat dissipation flow channels into a plurality of branch flow channels which are communicated in parallel, one end of each branch flow channel is communicated with the cavity outlet, and the other end of each branch flow channel is communicated with the cavity inlet. Because the radiating fins separate the radiating runners into the branch runners, and the branch runners are communicated in parallel, the problems of large flow resistance and low radiating efficiency caused by staggered arrangement of adjacent radiating fins are avoided.

Description

Heat radiation structure, power module and motor controller

Technical Field

The present utility model relates to the field of power module heat dissipation technologies, and in particular, to a heat dissipation structure, a power module, and a motor controller.

Background

For the new energy automobile electric control product, a power semiconductor (MOS, IGBT and the like) exists in a conversion module in a power module, namely a power tube for short, and a large amount of heat can be generated due to loss when the power tube is electrified and works, so that heat dissipation is one of key technologies of the power module.

At present, a heat dissipation water channel is generally arranged for dissipating heat of the power tube, the heat dissipation water channel comprises a shell and a sealing plate for sealing the shell to form a water channel, a plurality of heat dissipation teeth are integrally formed on the sealing plate through cold forging, and when the shell is sealed by the sealing plate, the heat dissipation teeth are positioned in the water channel through which water flows, so that the water flows through the heat dissipation teeth, and heat on the heat dissipation teeth is dissipated. In order to enable water flow to pass through each heat dissipation tooth, adjacent heat dissipation teeth are arranged in a staggered manner along the direction from one end to the other end of the heat dissipation water channel. Adjacent heat dissipation teeth are arranged in a staggered mode, so that flow resistance of water flow is correspondingly increased, and heat dissipation efficiency is reduced.

Disclosure of utility model

Accordingly, a first object of the present utility model is to provide a heat dissipation structure for reducing the flow resistance in the flow channel and improving the heat dissipation efficiency.

A second object of the present utility model is to provide a power module.

A third object of the present utility model is to provide a motor controller.

In order to achieve the first object, the present utility model provides the following solutions:

A heat dissipating structure, comprising:

the inner cavity is provided with a heat dissipation cavity with a heat dissipation flow channel, and a cavity inlet and a cavity outlet are respectively arranged on the heat dissipation cavity;

The heat dissipation fins are arranged in the heat dissipation flow channels, the number of the heat dissipation fins is multiple, the heat dissipation fins are sequentially arranged at intervals along the width direction of the heat dissipation flow channels, the heat dissipation flow channels are divided into a plurality of branch flow channels which are communicated in parallel, one end of each branch flow channel is communicated with the cavity outlet, and the other end of each branch flow channel is communicated with the cavity inlet.

In a specific embodiment, the heat dissipation cavity is further provided with a main runner;

The main runner is communicated with the cavity inlet, at least 1 side of the main runner is provided with the branch runner along the length direction of the main runner, and the inlets of the branch runners are respectively communicated with a first communication port arranged on the side wall of the main runner.

In another specific embodiment, the number of the first communication ports is plural, and the first communication ports are arranged at intervals along at least one side of the length direction of the main flow channel;

the 1 first communication port is at least communicated with 1 branch flow passage.

In another specific embodiment, the main flow channel is tapered in cross section in a direction from an end closer to the cavity inlet to an end farther from the cavity inlet.

In another specific embodiment, the heat dissipation cavity is also provided with a confluence flow passage;

The converging flow passage is communicated with the cavity outlet, at least one side of the converging flow passage is provided with the branch flow passage along the length direction of the converging flow passage, and the outlets of the branch flow passages are respectively communicated with second communication ports arranged on the side wall of the converging flow passage.

In another specific embodiment, the number of the second communication ports is plural, and the second communication ports are arranged at intervals along at least one side of the length direction of the confluence flow channel;

the 1 second communication port is at least communicated with 1 branch flow passage.

In another specific embodiment, the number of the main runners is 1, the number of the converging runners is 2, 1 converging runner is arranged on one side of the main runners in the length direction, and the other 1 converging runner is arranged on the other side of the main runners.

In another specific embodiment, the cavity inlet and the cavity outlet are respectively located at two ends of the heat dissipation cavity in the length direction, the cavity inlet is formed at the bottom end or the side wall of the heat dissipation cavity, and the cavity outlet is formed at the bottom end or the side wall of the heat dissipation cavity.

In another specific embodiment, the number of the main flow channels and the number of the confluence flow channels are 1, and the main flow channels and the confluence flow channels are respectively arranged at two sides of the heat dissipation flow channels in the length direction.

In another specific embodiment, the cavity inlet and the cavity outlet are positioned at the same end of the heat dissipation cavity in the length direction, the cavity inlet is formed at the bottom end or the side wall of the heat dissipation cavity, and the cavity outlet is formed at the bottom end or the side wall of the heat dissipation cavity;

Or alternatively

The cavity inlet and the cavity outlet are respectively arranged at different ends of the heat dissipation cavity along the length direction and are respectively positioned at two opposite corners of the heat dissipation cavity, the cavity inlet is arranged at the bottom end or the side wall of the heat dissipation cavity, and the cavity outlet is arranged at the bottom end or the side wall of the heat dissipation cavity.

In another specific embodiment, the heat dissipation structure further comprises a support separation rib arranged in the heat dissipation flow channel;

The number of the supporting separation ribs is multiple, the supporting separation ribs are sequentially arranged at intervals along the width direction of the heat dissipation flow channel, the adjacent supporting separation ribs enclose and form accommodating cavities for accommodating the heat dissipation fins, the accommodating cavities are connected in parallel, one end of each supporting separation rib is communicated with the cavity inlet, and the other end of each supporting separation rib is communicated with the cavity outlet.

In another specific embodiment, a positioning boss opposite to the position of the accommodating cavity is arranged on the outer wall of the heat dissipation cavity and used for positioning the device to be heat-dissipated.

In another specific embodiment, the number of the positioning bosses is equal to the number of the accommodating cavities, and the positioning bosses are arranged in a one-to-one correspondence.

In another specific embodiment, the heat dissipating fins are welded, adhered or removably attached within the heat dissipating channels.

The various embodiments according to the utility model may be combined as desired and the resulting embodiments after such combination are also within the scope of the utility model and are part of specific embodiments of the utility model.

According to the heat radiation structure provided by the utility model, the heat radiation fins are arranged in the heat radiation flow channel, and divide the heat radiation flow channel into the plurality of branch flow channels which are communicated in parallel, so that cooling medium enters the heat radiation cavity from the cavity inlet, then enters the plurality of branch flow channels which are arranged in parallel along the length direction of the heat radiation flow channel, radiates heat through each heat radiation fin, and flows out from the cavity outlet. Because the radiating fins separate the radiating runners into the branch runners, and the branch runners are communicated in parallel, the problems of large flow resistance and low radiating efficiency caused by staggered arrangement of adjacent radiating fins are avoided.

In order to achieve the second object, the present utility model provides the following solutions:

a power module comprising a power device and a heat dissipation structure as defined in any one of the above;

the power device dissipates heat through the heat dissipation structure.

Because the power module provided by the utility model comprises the heat radiation structure in any one of the above, the heat radiation structure has the beneficial effects that the power module disclosed by the utility model comprises.

In order to achieve the third object, the present utility model provides the following solutions:

a vehicle comprising a heat dissipating structure as defined in any one of the above or a power module as defined in the above.

Because the vehicle provided by the utility model comprises the heat radiation structure or the power module, the heat radiation structure or the power module has the beneficial effects that the vehicle disclosed by the utility model comprises.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without novel efforts for a person skilled in the art.

FIG. 1 is a schematic diagram of an explosion structure of a power module according to an embodiment of the present utility model;

FIG. 2 is a schematic three-dimensional structure of a power module according to an embodiment of the utility model;

FIG. 3 is a schematic diagram illustrating a front view of a power module according to an embodiment of the utility model;

FIG. 4 is a schematic view of the cross-sectional structure of A-A of FIG. 3;

FIG. 5 is a schematic diagram illustrating a structure of a cooling medium flowing in a heat dissipation channel according to an embodiment of the present utility model;

FIG. 6 is a schematic three-dimensional view of a bottom closure plate according to one embodiment of the present utility model;

FIG. 7 is a schematic top view of a bottom closure plate according to one embodiment of the present utility model;

FIG. 8 is a schematic left-hand structural view of a bottom closure plate according to one embodiment of the present utility model;

FIG. 9 is a schematic three-dimensional structure of a power module according to another embodiment of the present utility model;

FIG. 10 is a schematic diagram illustrating an exploded structure of a power module according to another embodiment of the present utility model;

FIG. 11 is a schematic diagram illustrating a front view of a power module according to another embodiment of the utility model;

FIG. 12 is a schematic view of the cross-sectional B-B structure of FIG. 11;

FIG. 13 is a schematic diagram illustrating a cooling medium flowing in a heat dissipation channel according to another embodiment of the present utility model;

fig. 14 is a schematic three-dimensional structure of a power module according to another embodiment of the utility model.

Wherein, in fig. 1-14:

The heat radiation structure 100, a heat radiation flow channel 101a, a heat radiation cavity 101, a bottom sealing plate 101c, a top sealing plate 101d, a supporting separation rib 101e, a heat radiation fin 102, an inlet joint 103, an outlet joint 104, a main flow channel 101i, a branch flow channel 101a-1, a first communication port 101i-1, a second communication port 101j-1, a positioning boss 101b, a converging flow channel 101j, a containing cavity 101h, a cavity inlet 101f, a cavity outlet 101g, a power module 1000 and a power device 200.

Detailed Description

The technical solutions according to the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 14 in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without novel efforts, are intended to fall within the scope of this utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top surface", "bottom surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limitations of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 14, a first aspect of the present utility model provides a heat dissipation structure 100, which is used for reducing flow resistance inside a flow channel of the heat dissipation structure 100 and improving heat dissipation efficiency.

Specifically, the heat dissipation structure 100 includes a heat dissipation cavity 101 and heat dissipation fins 102, where the heat dissipation cavity 101 has an inner cavity, and the inner cavity has a heat dissipation flow channel 101a that allows a cooling medium to circulate. As shown in fig. 1, the heat dissipation cavity 101 includes a bottom sealing plate 101c and a top sealing plate 101d, where the bottom sealing plate 101c is a box-shaped structure with an open top, and the top sealing plate 101d is sealed and arranged at the top of the bottom sealing plate 101c, specifically, the bottom sealing plate 101c and the top sealing plate may be welded, and may also be sealed by a sealing ring and a fastener and detachably connected.

One end of the heat dissipation cavity 101 is provided with a cavity inlet 101f for inputting a cooling medium to the heat dissipation flow channel 101a, and the other end of the heat dissipation cavity 101 is provided with a cavity outlet 101g for outputting the cooling medium. It will be appreciated that the cooling medium may be cooling water, other cooling liquids, etc.

The number of the radiating fins 102 is plural, and the plurality of radiating fins 102 are sequentially arranged at intervals along the width direction of the radiating runner 101a so as to divide the radiating runner 101a into a plurality of branch runners 101a-1 which are communicated in parallel, one end of the branch runner 101a-1 is communicated with the cavity outlet 101g, and the other end is communicated with the cavity inlet 101 f. The plurality of heat dissipation fins 102 are not limited to 1 row, and are arranged at intervals in the width direction of the heat dissipation flow path 101a, as shown in fig. 10, 12 and 13; as shown in fig. 4 and 5, the heat dissipation fins 102 in the 2 rows of heat dissipation channels 101a may be sequentially arranged at intervals along the width direction of the heat dissipation channel 101a to form 2 rows of branch channels 101a-1, and all the branch channels 101a-1 in the 2 rows of branch channels 101a-1 are connected in parallel and communicated; of course, the plurality of heat dissipation fins 102 may be divided into 3 rows or more than 3 rows, and all the branch flow passages 101a-1 formed by each row are connected in parallel, so as to avoid the problems of large flow resistance and low heat dissipation efficiency caused by dislocation between adjacent heat dissipation fins 102 along the flow direction of the cooling medium when the branch flow passages are connected in series.

The plurality of heat dissipation fins 102 may be sequentially arranged at intervals along the width direction of the heat dissipation flow channel 101 a: the heat radiation fins 102 may be parallel to the longitudinal direction of the heat radiation flow path or may be inclined at a predetermined angle to the longitudinal direction of the heat radiation flow path 101 a. The width direction of the heat dissipation flow channel 101a refers to the direction in which the heat dissipation flow channel 101a is perpendicular to the flow of the cooling medium in the heat dissipation flow channel 101 a; the longitudinal direction of the heat dissipation flow path 101a refers to the direction in which the cooling medium flows in the heat dissipation flow path 101 a.

The heat dissipation fins 102 and the heat dissipation cavity 101 are formed separately, and a plurality of heat dissipation fins 102 are mounted in the heat dissipation flow channel 101a respectively. That is, the heat dissipation cavity 101 and the heat dissipation fin 102 are manufactured and formed separately, so that the heat dissipation cavity is not limited by the heat dissipation tooth spacing required by the integral cold forging forming, and the heat dissipation fin 102 can be encrypted, thereby improving the heat dissipation capability. Specifically, the heat radiation fins 102 are welded, adhered, or detachably connected in the heat radiation flow passage 101 a. The detachable connection mode can be realized by clamping and the like.

In order to reduce the number of parts required for the heat dissipation structure 100, it is exemplified that the heat dissipation fins 102 are welded in the heat dissipation flow channel 101 a. Specifically, the heat radiating fins 102 are first placed in the bottom sealing plate 101c, and then soldered, and then the top sealing plate 101d is covered on the bottom sealing plate 101c, and soldered. More specifically, the welding is performed with solder or a lug, avoiding the problem of a large number of parts caused by using a seal ring and a fastener to mount the heat radiating fins 102 and the top sealing plate 101 d.

In order to facilitate the input and output of the cooling medium, as shown in fig. 1-3, 9, 10, 12 and 14, the heat dissipation structure 100 according to an embodiment of the present utility model further includes an inlet connector 103 and an outlet connector 104, where the inlet connector 103 is installed at the inlet of the heat dissipation cavity 101, and the outlet connector 104 is installed at the outlet of the heat dissipation cavity 101.

Further, an embodiment of the present utility model further discloses that the inlet connector 103 is welded at the inlet of the heat dissipation cavity 101, and the outlet connector 104 is welded at the outlet of the heat dissipation cavity 101, so that the problem of a large number of parts caused by installing the inlet connector 103 and the outlet connector 104 through the sealing member and the fastening member is avoided, and in addition, the present utility model improves the connection strength of the inlet connector 103 and the outlet connector 104 with the heat dissipation cavity 101.

In the heat dissipation structure 100 provided in an embodiment of the utility model, as shown in fig. 4, a heat dissipation runner 101a includes a main runner 101i, wherein the main runner 101i is communicated with a cavity inlet 101f, a branch runner 101a-1 is disposed along at least 1 side of the length direction of the main runner 101i, and inlets of the branch runners 101a-1 are respectively communicated with a first communication port 101i-1 disposed on a side wall of the main runner 101 i. That is, each of the branch flow passages 101a-1 is provided on one side or both sides in the longitudinal direction of the main flow passage 101 i. That is, each of the branch flow passages 101a-1 is provided in order along the longitudinal direction of the main flow passage 101i, perpendicular to the longitudinal direction of the main flow passage 101i or inclined, so that a plurality of branch flow passages 101a-1 are arranged.

As shown in fig. 4, the main runner 101i 101a-1 is open at one end and closed at one end, so that the cooling medium is prevented from being discharged along the main runner 101i, but not through the branch runners 101a-1, so that the cooling medium in the main runner 101i can enter each branch runner 101a-1 respectively, and the cooling medium is converged at the outlets of each branch runner 101a-1 and discharged through the cavity outlet 101g of the heat dissipation cavity 101, as shown in fig. 5.

The main flow channel 101i may be formed by being surrounded by the inner wall of the cavity body 101a and the heat dissipation fins 102, may be formed by being surrounded by the inner wall of the cavity body 101a and the support ribs provided in the cavity body 101a, or may be formed by being surrounded by the inner wall of the cavity body 101a or the support ribs provided in the cavity body 101 a. One end of the main flow channel 101i is open, one end is closed, namely, one end of the main flow channel 101i is open, and the other end of the main flow channel 101i is closed, namely, cooling medium in the main flow channel 101i can only enter the branch flow channel 101a-1 through the first communication port 101i-1, so that all cooling medium is discharged out of the heat dissipation cavity 101 again through the heat dissipation fins 102, and the utilization rate of the cooling medium is improved.

It should be understood that the above-disclosed matching manner of the main flow channel 101i and the branch flow channel 101a-1 is only one specific embodiment of the present utility model, and in practical application, it may also be: the main flow passage 101i is provided with both ends open in the longitudinal direction, and the cooling medium in the main flow passage 101i can enter at least a majority of each of the branch flow passages 101 a-1.

Further, as shown in fig. 4, along the extending direction of the main flow channel 101i, at least one side wall of the main flow channel 101i is provided with a plurality of first communication ports 101i-1 arranged at intervals.

The 1 first communication port 101i-1 communicates with at least 1 branch flow passage 101a-1, that is, 1 first communication port 101i-1 may be provided to simultaneously communicate with 2 or more branch flow passages 101a-1, or 1 first communication port 101i-1 may be provided to communicate with only 1 branch flow passage 101a-1, specifically, according to actual needs.

The main flow passage 101i gradually becomes smaller in cross section along the direction from the end of the cavity inlet 101f close to the heat dissipation cavity 101 to the end distant from the cavity inlet 101 f. In the main flow passage 101i, the flow velocity gradually decreases as part of the cooling medium enters the branch flow passage 101a-1 in a direction away from the inlet of the heat dissipation chamber 101. By arranging the main flow passage 101i in a direction from one end to the other end close to the inlet of the heat dissipation cavity 101, the cross section becomes gradually smaller, and the flow velocity at the position far away from the inlet of the heat dissipation cavity 101 in the main flow passage 101i is increased, so that the flow velocity of the cooling medium entering each branch flow passage 101a-1 is uniform. It will be appreciated that the variation of the cross section of the main flow channel 101i may be obtained by simulation, or may be obtained by first performing theoretical calculation and performing a plurality of experiments.

It should be noted that the flow velocity in each of the branch flow passages 101a-1 may be uniform by providing the first communication ports 101i-1 with different sizes. Specifically, the first communication port 101i-1 may be provided to decrease in size along a direction from one end of the cavity inlet 101f close to the heat dissipation cavity 101 to one end distant from the cavity inlet 101f, and the corresponding branch flow passage 101a-1 may also decrease in cross-sectional size, so that the flow rate flowing through each branch flow passage 101a-1 is uniform.

In the heat dissipation structure 100 provided in an embodiment of the utility model, the heat dissipation flow channel 101a further includes a converging flow channel 101j, as shown in fig. 4, 6, 7 and 12, the converging flow channel 101j is communicated with an outlet of the heat dissipation cavity 101, at least one side of the converging flow channel 101j is provided with a branch flow channel 101a-1 along a length direction of the converging flow channel 101j, and the outlet of each branch flow channel 101a-1 is respectively communicated with a second communication port 101j-1 provided on a side wall of the converging flow channel 101 j.

The longitudinal direction of the converging flow passage 101j refers to the flow direction of the cooling medium in the converging flow passage 101 j; the provision of the branch flow passage 101a-1 on at least one side of the confluence flow passage 101j means that the plurality of branch flow passages 101a-1 may be arranged on only one side of the confluence flow passage 101j in the longitudinal direction, or the plurality of branch flow passages 101a-1 may be arranged on both sides of the confluence flow passage 101j in the longitudinal direction, and the branch flow passages 101a-1 may be arranged perpendicular to the confluence flow passage 101j or inclined.

Specifically, the confluence flow channels 101j may be disposed parallel to the main flow channels 101a, all along the length direction of the heat dissipation cavity 101, to reduce the length of the heat dissipation structure 100.

The converging flow passage 101j may be formed by being surrounded by the inner wall of the cavity body 101a and the heat radiating fins 102, may be formed by being surrounded by the inner wall of the cavity body 101a and the support ribs provided in the cavity body 101a, or may be formed by being surrounded by the inner wall of the cavity body 101a or the support ribs provided in the cavity body 101 a.

The number of the second communication ports 101j-1 is plural, and 1 second communication port 101j-1 communicates with at least 1 branch flow passage 101a-1, that is, 1 second communication port 101j-1 may be provided to simultaneously communicate with 2 or more than 2 branch flow passages 101a-1, or 1 second communication port 101j-1 may be provided to communicate with only 1 branch flow passage 101a-1, specifically, the configuration is performed according to actual needs.

The second communication ports 101j-1 are provided so that the cooling medium in each of the branch flow passages 101a-1 enters the merging flow passage 101 j.

The heat dissipation structure 100 provided in an embodiment of the present utility model further includes supporting separation ribs 101e disposed in the heat dissipation flow channel 101a, as shown in fig. 1, 4, 6, 7, 10 and 12, the number of the supporting separation ribs 101e is plural, and the supporting separation ribs are sequentially disposed at intervals along the width direction of the heat dissipation flow channel 101a, and the adjacent supporting separation ribs 101e enclose a receiving cavity for receiving the heat dissipation fins 102, and each receiving cavity is disposed in parallel connection, and one end is communicated with the cavity inlet 101f, and the other end is communicated with the cavity outlet 101 g. More specifically, one end of each accommodation chamber communicates with the first communication port 101i-1 of the main flow passage, and the other end communicates with the second communication port 101j-1 of the confluence flow passage 101 j.

The arrangement of the supporting separation rib 101e realizes on the one hand that the accommodating cavity for installing the radiating fins 102 is formed, on the other hand, the bottom end of the top sealing plate 101d is connected with the bottom sealing plate 101c, and the top end is connected with the top sealing plate 101d, so as to realize the support of the top sealing plate 101 a.

It should be noted that, the number of the heat dissipation fins 102 in the accommodating cavity 101h is not limited, and when the number of the heat dissipation fins 102 installed in the accommodating cavity 101h is greater than or equal to 2, the heat dissipation fins 102 are sequentially arranged at intervals along the width direction of the accommodating cavity 101h, as shown in fig. 4, specifically, in the same accommodating cavity 101h, the heat dissipation fins 102 are arranged at equal intervals, so that the flow velocity flowing through the branch flow channels 101a-1a is uniform.

As shown in fig. 6 and 7, the inner cavity of the heat dissipation chamber 101 is partitioned into a main flow channel 101i and a branch flow channel 101a-1 by a plurality of rib plates 101 e.

As shown in fig. 1, the outer wall of the heat dissipation cavity 101 is provided with a positioning boss 101b for positioning the device to be heat-dissipated, specifically, the positioning boss 101b is opposite to the accommodating cavity 101h, so as to improve the heat dissipation efficiency of the device to be heat-dissipated. It should be understood that the shape of the positioning boss 101b is not limited, and may be rectangular, circular, or the like, and in this embodiment, the positioning boss 101b is exemplified as a square.

Further, the number of the positioning bosses 101b is equal to that of the accommodating cavities 101h, and the positioning bosses are arranged in one-to-one correspondence, so that simultaneous heat dissipation of a plurality of devices to be cooled is facilitated.

When the interval between the adjacent branch flow passages 101a-1 is large, the supporting spacer ribs 101e may be provided in a hollow cylindrical structure to reduce the weight of the overall heat dissipation structure 100.

Example 1

As shown in fig. 1 to 8, in the present embodiment, the number of main flow channels 101i is 1, the number of converging flow channels is 2, 1 converging flow channel 101j is disposed on one side of the main flow channel 101i in the longitudinal direction, and the other 1 converging flow channel 101j is disposed on the other side of the main flow channel 101 i.

In order to facilitate the realization of the heat dissipation structure 100 that dissipates heat uniformly to the device to be dissipated, the branch flow channels 101a-1 on both sides of the main flow channel 101i are symmetrically arranged with respect to the main flow channel 101 i. The length direction of the heat dissipation fins 102 is perpendicular to the length direction of the main flow channel 101i and the confluence flow channel 101j, that is, the heat dissipation fins 102 are arranged along the width direction of the heat dissipation cavity 101, the main flow channel 101i and the confluence flow channel are arranged along the length direction of the heat dissipation cavity 101, so that the space of the heat dissipation cavity 101 is conveniently and fully utilized, and in addition, the problem of large flow resistance caused by sequential dislocation of the heat dissipation fins 102 along the length direction of the heat dissipation cavity 101 is avoided.

Further, the cavity inlet 101f and the cavity outlet 101g are both formed at the bottom end of the heat dissipation cavity 101, and are respectively located at two ends of the heat dissipation cavity 101 in the length direction. Specifically, the cavity inlet 101f and the cavity outlet 101g are both located on a symmetry center line of the heat dissipation cavity 101 along the length direction, and the cooling medium discharged from the outlets of the 2 converging flow channels 101j is converged into the cavity outlet 101g to be discharged out of the heat dissipation cavity 101.

It should be noted that, the cavity inlet 101f and the cavity outlet 101g are not limited to be formed at the bottom end of the heat dissipation cavity 101, and may be formed at other positions of the heat dissipation cavity 101, for example, on a side wall of the heat dissipation cavity 101, as shown in fig. 9.

According to the heat dissipation structure 100 provided by the embodiment, the heat dissipation flow channels 101a are divided into the plurality of branch flow channels 101a-1 connected in parallel through the heat dissipation fins 102, so that the flow resistance of cooling medium is reduced, and the cooling efficiency is improved.

Example two

As shown in fig. 10 to 13, in the present embodiment, the number of the main flow channels 101i and the confluent flow channels 101j is 1, and the main flow channels 101i and the confluent flow channels 101j are respectively disposed at two sides of the heat dissipation flow channel 101a in the length direction, that is, the main flow channels 101i and the confluent flow channels 101j are respectively disposed at two sides of the heat dissipation fin 102. Specifically, the main flow channel 101i and the converging flow channel 101j are symmetrically arranged about a symmetrical center line in the longitudinal direction of the heat dissipation cavity 101, so that the processing and the manufacturing are facilitated.

The cavity inlet 101f and the cavity outlet 101g are both arranged at the same end of the heat dissipation cavity 101 along the length direction, namely, the positions of the cavity inlet 101f and the cavity outlet 101g are similar, so that pipelines connecting the cavity inlet 101f and the cavity outlet 101g are convenient to disassemble and assemble.

It should be noted that the cavity inlet 101f and the cavity outlet 101g may also be formed at the bottom end of the heat dissipation cavity 101.

The converging flow passage 101j gradually decreases in cross section in a direction from one end closer to the chamber outlet 101g to one end farther from the chamber outlet 101 g. Since the merging flow passage 101j increases the cooling medium collected in the merging flow passage 101j by each branch flow passage 101a-1 along the direction from the end closer to the cavity outlet 101g to the end farther from the cavity outlet 101g, the cooling medium can be conveniently and rapidly introduced into the merging flow passage 101j by enlarging the cross section of the merging flow passage 101 j.

It will be appreciated that the variation of the cross section of the converging channel 101j may be obtained by simulation, or may be calculated theoretically, and obtained by a plurality of experiments.

Example III

As shown in fig. 14, the present embodiment is similar to the third embodiment in structure, except that in the present embodiment, the cavity inlet 101f and the cavity outlet 101g are respectively formed at different ends of the heat dissipation cavity 101 along the length direction and are respectively located at two opposite corners of the heat dissipation cavity 101.

The converging flow passage 101j gradually increases in cross section in a direction from one end closer to the chamber outlet 101g to one end farther from the chamber outlet 101 g. Since the merging flow path 101j increases the cooling medium collected in the merging flow path 101j by each of the branch flow paths 101a-1101a-2 in a direction from one end closer to the cavity outlet 101g to one end farther from the cavity outlet 101g, the present utility model facilitates rapid discharge of the cooling medium from the merging flow path 101j by reducing the cross section of the merging flow path 101 j.

As shown in fig. 1 to 14, a second aspect of the present utility model provides a power module 1000, which includes a power device 200 and a heat dissipation structure 100 according to any one of the foregoing embodiments, wherein the power device 200 dissipates heat through the heat dissipation structure 100.

Because the power module 1000 provided by the present utility model includes the heat dissipation structure 100 in any of the embodiments, the heat dissipation structure 100 has the beneficial effects that the power module 1000 disclosed by the present utility model includes.

A third aspect of the present utility model provides a motor controller, including the heat dissipation structure 100 as in any of the above embodiments or the power module 1000 as in the above embodiments.

Since the motor controller provided by the utility model comprises the heat dissipation structure 100 in any one of the embodiments or the power module 1000 in the embodiment, the heat dissipation structure 100 or the power module 1000 has the beneficial effects that the motor controller disclosed by the utility model comprises.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

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

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (15)

1. A heat dissipation structure (100), comprising:

The inner cavity is provided with a heat dissipation cavity (101) with a heat dissipation flow channel (101 a), and a cavity inlet (101 f) and a cavity outlet (101 g) are respectively arranged on the heat dissipation cavity (101);

The heat dissipation fins (102) are arranged in the heat dissipation flow channel (101 a), the number of the heat dissipation fins (102) is multiple, the heat dissipation fins are sequentially arranged at intervals along the width direction of the heat dissipation flow channel (101 a) so as to divide the heat dissipation flow channel (101 a) into a plurality of branch flow channels (101 a-1) which are communicated in parallel, one end of each branch flow channel (101 a-1) is communicated with the cavity outlet (101 g), and the other end of each branch flow channel is communicated with the cavity inlet (101 f).

2. The heat dissipation structure (100) according to claim 1, wherein the heat dissipation cavity (101) further has a main flow channel (101 i) therein;

The main runner (101 i) is communicated with the cavity inlet (101 f), the branch runners (101 a-1) are arranged on at least 1 side along the length direction of the main runner (101 i), and the inlets of the branch runners (101 a-1) are respectively communicated with a first communication port (101 i-1) arranged on the side wall of the main runner (101 i).

3. The heat dissipation structure (100) according to claim 2, wherein the number of the first communication ports (101 i-1) is plural and is arranged at intervals along at least one side of the length direction of the main flow channel (101 i);

the 1 first communication port (101 i-1) is communicated with at least 1 branch flow passage (101 a-1).

4. The heat radiation structure (100) according to claim 2, wherein the main flow passage (101 i) is tapered in cross section in a direction from an end closer to the cavity inlet (101 f) to an end farther from the cavity inlet (101 f).

5. The heat dissipation structure (100) according to claim 2, wherein the heat dissipation cavity (101) further has a converging flow passage (101 j) therein;

The converging flow passage (101 j) is communicated with the cavity outlet (101 g), the branch flow passage (101 a-1) is arranged on at least one side along the length direction of the converging flow passage (101 j), and the outlet of each branch flow passage (101 a-1) is respectively communicated with a second communication port (101 j-1) arranged on the side wall of the converging flow passage (101 j).

6. The heat dissipation structure (100) according to claim 5, wherein the number of the second communication ports (101 j-1) is plural and is arranged at intervals along at least one side of the length direction of the confluence flow passage (101 j);

The 1 second communication port (101 j-1) is communicated with at least 1 branch flow passage (101 a-1).

7. The heat dissipation structure (100) according to claim 5, wherein the number of the main flow channels (101 i) is 1, the number of the confluence flow channels (101 j) is 2, 1 confluence flow channel (101 j) is disposed at one side of the main flow channel (101 i) in the length direction, and the other 1 confluence flow channel (101 j) is disposed at the other side of the main flow channel (101 i).

8. The heat dissipation structure (100) according to claim 7, wherein the cavity inlet (101 f) and the cavity outlet (101 g) are respectively located at two ends of the heat dissipation cavity (101) in the length direction, the cavity inlet (101 f) is formed at the bottom end or the side wall of the heat dissipation cavity (101), and the cavity outlet (101 g) is formed at the bottom end or the side wall of the heat dissipation cavity (101).

9. The heat dissipation structure (100) according to claim 5, wherein the number of the main flow channels (101 i) and the confluence flow channels (101 j) is 1, and the main flow channels and the confluence flow channels are respectively disposed at two sides of the heat dissipation flow channel (101 a) in the length direction.

10. The heat dissipation structure (100) according to claim 9, wherein the cavity inlet (101 f) and the cavity outlet (101 g) are located at the same end of the heat dissipation cavity (101) in the length direction, the cavity inlet (101 f) is formed at the bottom end or the side wall of the heat dissipation cavity (101), and the cavity outlet (101 g) is formed at the bottom end or the side wall of the heat dissipation cavity (101);

Or alternatively

The cavity inlet (101 f) and the cavity outlet (101 g) are respectively arranged at different ends of the heat dissipation cavity (101) along the length direction and are respectively positioned at two opposite corners of the heat dissipation cavity (101), the cavity inlet (101 f) is arranged at the bottom end or the side wall of the heat dissipation cavity (101), and the cavity outlet (101 g) is arranged at the bottom end or the side wall of the heat dissipation cavity (101).

11. The heat dissipating structure (100) of claim 1, further comprising a support spacer rib (101 e) disposed within the heat dissipating channel (101 a);

The number of the supporting separation ribs (101 e) is multiple, the supporting separation ribs are sequentially arranged at intervals along the width direction of the heat dissipation flow channel (101 a), the adjacent supporting separation ribs (101 e) enclose and form accommodating cavities (101 h) for accommodating the heat dissipation fins (102), the accommodating cavities (101 h) are communicated in parallel, one end of each accommodating cavity is communicated with the cavity inlet (101 f), and the other end of each accommodating cavity is communicated with the cavity outlet (101 g).

12. The heat dissipating structure (100) of claim 11, wherein an outer wall of the heat dissipating cavity (101) is provided with a positioning boss (101 b) facing the position of the accommodating cavity (101 h) for positioning the device to be heat dissipated.

13. The heat dissipating structure (100) according to any of claims 1-12, wherein the heat dissipating fins (102) are welded, glued or detachably connected within the heat dissipating flow channel (101 a).

14. A power module (1000) comprising a power device (200) and a heat dissipation structure (100) as claimed in any one of claims 1-13;

the power device (200) dissipates heat through the heat dissipation structure (100).

15. A motor controller comprising a heat dissipating structure (100) according to any of claims 1-13 or a power module (1000) according to claim 14.