Branched liquid cooling flow channel for frequency converter

Abstract

The utility model discloses a branch type liquid cooling flow channel for a frequency converter. The branch type liquid cooling flow channel comprises a liquid flow leading-in cavity, a first heat dissipation cavity, a second heat dissipation cavity, a third heat dissipation cavity, a fifth heat dissipation cavity, a sixth heat dissipation cavity, a seventh heat dissipation cavity, a liquid flow leading-out cavity and a fourth heat dissipation cavity arranged in a placing block, the lead-in liquid flow cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity and the lead-out liquid flow cavity are connected in series; the first heat dissipation cavity and the second heat dissipation cavity are arranged between the liquid flow guiding-in cavity and the third heat dissipation cavity side by side. The sixth heat dissipation cavity and the seventh heat dissipation cavity are arranged between the fifth heat dissipation cavity and the export liquid flow cavity in parallel; the first heat dissipation cavity, the second heat dissipation cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity, the sixth heat dissipation cavity and the seventh heat dissipation cavity are located above or below the corresponding electronic elements respectively. According to the utility model, through the combination of series connection and parallel connection, the flow of cooling liquid in the plurality of heat dissipation cavities is reasonably distributed, the heat dissipation effect is improved, and the occupied space is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter heat dissipation technical field especially, relates to a branch type liquid cooling flow channel for frequency converter. BACKGROUND

[0002] With the power of frequency converter bigger and bigger, the heat quantity of each component in it is also higher and higher, if the heat cannot be dissipated in time, the frequency converter will heat and alarm and stop. Liquid cooling has the advantages of high heat dissipation efficiency, low noise, small environmental dependence and is widely used in the field of frequency converter heat dissipation.

[0003] When liquid cooling is used, the form of liquid cooling flow channel arranged on the liquid cooling plate determines the efficiency of liquid cooling, the common flow channel has series flow channel and parallel flow channel, when only series flow channel is used, the cooling liquid flow in each heat dissipation cavity in series flow channel is same, but with the lengthening of flow channel, the cooling liquid temperature in the heat dissipation cavity at the rear end rises, the cooling liquid temperature difference in front and rear heat dissipation cavities is too large, and the heat dissipation capacity of liquid cooling plate is reduced, when only parallel flow channel is used, the parallel flow channel occupies large space, and the flow resistance is large, so that a pump with large power is needed, therefore, in order to solve the above problems, the application provides a branch type liquid cooling flow channel for frequency converter. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide a branch type liquid cooling flow channel for frequency converter, which reasonably distributes the cooling liquid flow in multiple heat dissipation cavities by combining series and parallel forms, improves the heat dissipation effect and reduces the occupied space.

[0005] The utility model provides a branch type liquid cooling flow channel for frequency converter, the frequency converter includes liquid cooling plate, the placement block of integral moulded setting with liquid cooling plate and a plurality of electronic elements are set up on liquid cooling plate and placement block, its characterized in that, branch type liquid cooling flow channel includes the guide liquid flow cavity of setting in liquid cooling plate, first heat dissipation cavity, second heat dissipation cavity, third heat dissipation cavity, fifth heat dissipation cavity, sixth heat dissipation cavity, seventh heat dissipation cavity, guide liquid flow cavity and fourth heat dissipation cavity setting in placement block,

[0006] The guide liquid flow cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity and the guide liquid flow cavity are connected in series;

[0007] The first heat dissipation cavity and the second heat dissipation cavity are arranged side by side between the liquid flow guide cavity and the third heat dissipation cavity, the liquid inlet end of the liquid flow guide cavity is communicated with the cooling liquid inlet arranged on the liquid cooling plate, the liquid outlet end of the liquid flow guide cavity is branched to form a first branch flow channel and a second branch flow channel, the first branch flow channel is communicated with the liquid inlet end of the first heat dissipation cavity, the second branch flow channel is communicated with the liquid inlet end of the second heat dissipation cavity, and the liquid outlet ends of the first heat dissipation cavity and the second heat dissipation cavity are communicated with the liquid inlet end of the third heat dissipation cavity;

[0008] The sixth heat dissipation cavity and the seventh heat dissipation cavity are arranged side by side between the fifth heat dissipation cavity and the liquid flow guide cavity, the liquid outlet end of the fifth heat dissipation cavity is branched to form a third branch flow channel and a fourth branch flow channel, the third branch flow channel is communicated with the liquid inlet end of the sixth heat dissipation cavity, the fourth branch flow channel is communicated with the liquid inlet end of the seventh heat dissipation cavity, the liquid outlet ends of the sixth heat dissipation cavity and the seventh heat dissipation cavity are communicated with the liquid inlet end of the liquid flow guide cavity, and the liquid outlet end of the liquid flow guide cavity is communicated with the cooling liquid outlet arranged on the liquid cooling plate.

[0009] The first heat dissipation cavity, the second heat dissipation cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity, the sixth heat dissipation cavity and the seventh heat dissipation cavity are respectively located above or below the corresponding electronic elements, and are used for dissipating heat of the plurality of electronic elements.

[0010] Further, the first branch flow channel and the second branch flow channel are formed in the liquid flow guide cavity by a first flow branch plate, a first flow branch inlet communicated with the first branch flow channel and a first flow branch outlet communicated with the third heat dissipation cavity are arranged on the first heat dissipation cavity, and a second flow branch inlet communicated with the second branch flow channel and a second flow branch outlet communicated with the third heat dissipation cavity are arranged on the second heat dissipation cavity.

[0011] Further, the first flow guide channel and the second flow guide channel are arranged at both ends of the fourth heat dissipation cavity in the placing block, the third heat dissipation cavity is communicated with the fourth heat dissipation cavity through the first flow guide channel, and the fifth heat dissipation cavity is communicated with the fourth heat dissipation cavity through the second flow guide channel.

[0012] Further, the third branch flow channel, the fourth branch flow channel, the sixth heat dissipation cavity and the seventh heat dissipation cavity are formed in the liquid outlet end of the fifth heat dissipation cavity by a second flow branch plate, the third branch flow channel is communicated with the sixth heat dissipation cavity, and the fourth branch flow channel is communicated with the seventh heat dissipation cavity.

[0013] Further, the receiving cavity for placing the electronic elements is arranged in the placing block.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a liquid cooling plate, including import liquid flow cavity, first radiating cavity, second radiating cavity, third radiating cavity, fourth radiating cavity, fifth radiating cavity, sixth radiating cavity, seventh radiating cavity and export liquid flow cavity, wherein import liquid flow cavity, third radiating cavity, fourth radiating cavity, fifth radiating cavity and export liquid flow cavity are connected in series and communicate, and first radiating cavity and second radiating cavity are arranged in parallel between import liquid flow cavity and third radiating cavity, sixth radiating cavity and seventh radiating cavity are arranged in parallel between fifth radiating cavity and export liquid flow cavity, and first radiating cavity, second radiating cavity, third radiating cavity, fifth radiating cavity, sixth radiating cavity and seventh radiating cavity are above or below corresponding electronic components respectively, and the corresponding electronic components are radiated, cooling liquid is shunted from import liquid flow cavity, one way flows into first radiating cavity, another way flows into second radiating cavity, and cooling liquid flows into third radiating cavity after flowing from first radiating cavity and second radiating cavity and converges, and after converging, flows out from third radiating cavity, and cooling liquid flows through fourth radiating cavity and fifth radiating cavity in turn, and cooling liquid is shunted again after flowing from fifth radiating cavity, one way flows into sixth radiating cavity, another way flows into seventh radiating cavity, and cooling liquid flows into export liquid flow cavity after flowing in sixth radiating cavity and seventh radiating cavity, and cooling liquid flows out from cooling liquid outlet through export liquid flow cavity, and cooling liquid radiates multiple electronic components installed on liquid cooling plate and placed blocks in the process of flowing, the multiple radiating cavities of the application adopt the form of series connection and parallel connection combination, compared with only series connection flow channel, the length of flow channel is shortened, and the cooling liquid temperature difference in front and back radiating cavities is avoided to be too large due to too long flow channel, and the radiating effect is improved, and compared with only parallel connection flow channel, the space occupied by flow channel is reduced.

[0016] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-limiting embodiments made by referring to the following drawings:

[0018] Figure 1 It is the perspective view of the utility model;

[0019] Figure 2 It is the top structure schematic view of the utility model;

[0020] Figure 3 It is the bottom structure schematic view of the utility model;

[0021] Figure 4The utility model discloses an installation electrical element's structure schematic view.

[0022] The figure mark: 1, liquid cooling board;2, place block;3, power unit;4, filter capacitor;5, contactor;6, rectifier bridge;7, input electric reactor;8, film capacitor;9, direct current electric reactor;

[0023] 11, import liquid flow cavity;12, first radiating cavity;13, second radiating cavity;14, third radiating cavity;15, fifth radiating cavity;16, sixth radiating cavity;17, seventh radiating cavity;18, export liquid flow cavity;19, cooling liquid inlet;110, cooling liquid outlet;

[0024] 21, storage cavity;22, fourth radiating cavity;23, first flow channel;24, second flow channel;

[0025] 111, first branch flow channel;112, second branch flow channel;113, first flow distribution plate;

[0026] 121, first flow inlet;122, first flow outlet;

[0027] 151, third branch flow channel;152, fourth branch flow channel;153, second flow distribution plate. DETAILED DESCRIPTION

[0028] The utility model makes further detailed explanation in combination with the drawings and embodiment below. It can be understood that the specific embodiment described here is only used for explaining the related utility model, and is not the limitation of the utility model. In addition, it needs to be explained that only the part related to the utility model is shown in the drawing for the convenience of description.

[0029] It needs to be explained that the embodiment in the utility model and the feature in the embodiment can be combined mutually without conflict. The utility model will be explained in detail below in combination with the embodiment and referring to the drawings.

[0030] Please refer to Figures 1-4 The embodiment of the utility model provides a branch type liquid cooling flow channel for frequency converter for cooling electronic components on the frequency converter;

[0031] The frequency converter includes liquid cooling board 1, place block 2 integrally formed with liquid cooling board 1 and a plurality of electronic components arranged on liquid cooling board 1 and place block 2, wherein place block 2 is arranged on the top of liquid cooling board 1, and storage cavity 21 for placing electronic components is formed in place block 2, and the electronic components include power unit 3 arranged on the top of liquid cooling board 1, filter capacitor 4, contactor 5, rectifier bridge 6, input electric reactor 7 and film capacitor 8 and direct current electric reactor 9 arranged in storage cavity 21;

[0032] The branched liquid cooling flow channel comprises an inlet liquid flow cavity 11, a first heat dissipation cavity 12, a second heat dissipation cavity 13, a third heat dissipation cavity 14, a fifth heat dissipation cavity 15, a sixth heat dissipation cavity 16, a seventh heat dissipation cavity 17, an outlet liquid flow cavity 18 arranged in the liquid cooling plate 1, and a fourth heat dissipation cavity 22 arranged in the placement block 2;

[0033] Specifically, the bottom of the liquid cooling plate 1 is inwardly recessed to form the inlet liquid flow cavity 11, the second heat dissipation cavity 13, the third heat dissipation cavity 14, the fifth heat dissipation cavity 15, the sixth heat dissipation cavity 16, the seventh heat dissipation cavity 17, and the outlet liquid flow cavity 18, the top of the liquid cooling plate 1 is inwardly recessed to form the first heat dissipation cavity 12, the top of the placement block 2 is inwardly recessed to form the fourth heat dissipation cavity 22, and the bottom of the liquid cooling plate 1 is sealingly provided with a lower cover plate, and the top of the placement block 2 is sealingly provided with an upper cover plate;

[0034] Preferably, the inlet liquid flow cavity 11, the third heat dissipation cavity 14, the fourth heat dissipation cavity 22, the fifth heat dissipation cavity 15, and the outlet liquid flow cavity 18 are arranged in series communication;

[0035] The first heat dissipation cavity 12 and the second heat dissipation cavity 13 are arranged side by side between the inlet liquid flow cavity 11 and the third heat dissipation cavity 14, the inlet end of the inlet liquid flow cavity 11 is in communication with a cooling liquid inlet 19 formed on the liquid cooling plate 1, the outlet end of the inlet liquid flow cavity 11 is branched to form a first branch flow channel 111 and a second branch flow channel 112, the first branch flow channel 111 is in communication with the inlet end of the first heat dissipation cavity 12, the second branch flow channel 112 is in communication with the inlet end of the second heat dissipation cavity 13, and the outlet ends of the first heat dissipation cavity 12 and the second heat dissipation cavity 13 are in communication with the inlet end of the third heat dissipation cavity 14;

[0036] The sixth heat dissipation cavity 16 and the seventh heat dissipation cavity 17 are arranged side by side between the fifth heat dissipation cavity 15 and the outlet liquid flow cavity 18, the outlet end of the fifth heat dissipation cavity 15 is branched to form a third branch flow channel 151 and a fourth branch flow channel 152, the third branch flow channel 151 is in communication with the inlet end of the sixth heat dissipation cavity 16, the fourth branch flow channel 152 is in communication with the inlet end of the seventh heat dissipation cavity 17, the outlet ends of the sixth heat dissipation cavity 16 and the seventh heat dissipation cavity 17 are in communication with the inlet end of the outlet liquid flow cavity 18, and the outlet end of the outlet liquid flow cavity 18 is in communication with a cooling liquid outlet 110 formed on the liquid cooling plate 1;

[0037] The first heat dissipation cavity 12, the second heat dissipation cavity 13, the third heat dissipation cavity 14, the fourth heat dissipation cavity 22, the fifth heat dissipation cavity 15, the sixth heat dissipation cavity 16, and the seventh heat dissipation cavity 17 are respectively located above or below the corresponding electronic components for dissipating heat from the plurality of electronic components.

[0038] Specifically, the first heat dissipation cavity 12 is located below the power unit 3, the power unit 3 is fixed on the top of the liquid cooling plate 1 by bolts, and the cylindrical pins of the power unit 3 are embedded into the first heat dissipation cavity 12, and the cooling liquid flows through the first heat dissipation cavity 12 to dissipate heat for the power unit 3;

[0039] The second heat dissipation cavity 13 is located below the filter capacitor 4, and the cooling liquid flows through the second heat dissipation cavity 13 to dissipate heat for the filter capacitor 4;

[0040] The third heat dissipation cavity 14 is located below the film capacitor 8, the film capacitor is embedded into the receiving cavity 21 in the placing block 2, and the embedded film capacitor is fixed by pouring heat-conducting glue, and the cooling liquid flows through the third heat dissipation cavity 14 to dissipate heat for the film capacitor 8;

[0041] The fourth heat dissipation cavity 22 is located above the direct-current reactor 9, and the direct-current reactor 9 is also embedded into the receiving cavity 21 in the placing block 2, and the embedded direct-current reactor 9 is fixed by pouring heat-conducting glue, and the cooling liquid flows through the fourth heat dissipation cavity 22 to dissipate heat for the direct-current reactor 9 and the film capacitor 8;

[0042] The fifth heat dissipation cavity 15 is located below the contactor 5, and the contactor 5 is fixed on the top of the liquid cooling plate 1 by bolts, and the cooling liquid flows through the fifth heat dissipation cavity 15 to dissipate heat for the contactor 5;

[0043] The sixth heat dissipation cavity 16 is located below the rectifier bridge 6, and the rectifier bridge 6 is fixed on the top of the liquid cooling plate 1 by bolts, and the cooling liquid flows through the sixth heat dissipation cavity 16 to dissipate heat for the rectifier bridge 6;

[0044] The seventh heat dissipation cavity 17 is located below the input reactor 7, and the input reactor 7 is fixed on the top of the liquid cooling plate 1 by bolts, and the cooling liquid flows through the seventh heat dissipation cavity 17 to dissipate heat for the input reactor 7;

[0045] When radiating heat, the cooling liquid flows into the guide liquid flow cavity 11 from the cooling liquid inlet 19, is divided in the guide liquid flow cavity 11, flows into the first radiating cavity 12 in one way, flows into the second radiating cavity 13 in another way, and radiates heat for the power unit 3 and the filter capacitor 4; flows into the third radiating cavity 14 after flowing from the first radiating cavity 12 and the second radiating cavity 13, converges, and radiates heat for the film capacitor 8; flows through the fourth radiating cavity and the fifth radiating cavity in turn after flowing from the third radiating cavity 14, radiates heat for the direct-current reactor 9 and the contactor 5; flows into the sixth radiating cavity 16 in one way and flows into the seventh radiating cavity 17 in another way after flowing from the fifth radiating cavity 15, radiates heat for the rectifier bridge 6 and the input reactor 7; the cooling liquid flows into the guide liquid flow cavity 18 after flowing in the sixth radiating cavity 16 and the seventh radiating cavity 17, flows out from the cooling liquid outlet 110 through the guide liquid flow cavity 18, and radiates heat for multiple electronic elements installed on the liquid cooling plate 1 in the flowing process; the multiple radiating cavities of the application are arranged in the form of combination of series connection and parallel connection, the length of the flow channel is shortened compared with the flow channel of only series connection, the cooling liquid temperature difference between front and rear radiating cavities is avoided to be too large due to too long flow channel, the radiating effect is improved, and the space occupied by the flow channel is reduced compared with the flow channel of only parallel connection.

[0046] It should be noted that the heat generation and the sensitivity to temperature of the power unit 3, the filter capacitor 4, the contactor 5, the rectifier bridge 6, the input reactor 7, the film capacitor 8 and the direct-current reactor 9 are simulated in the radiating simulation software, according to the simulation data, the heat generation of the power unit 3 is high, the heat generation of the filter capacitor 4 is low, the cooling liquid flow into the first branch flow channel 111 and the second branch flow channel 112 can be reasonably distributed according to the heat generation of the power unit 3 and the filter capacitor 4, so that the flow into the first branch flow channel 111 is greater than the flow into the second branch flow channel 112; similarly, according to the simulation structure, the heat generation of the input reactor 7 is higher than the heat generation of the rectifier bridge 6, the cooling liquid flow into the fourth branch flow channel 152 and the third branch flow channel 151 can be reasonably distributed according to the heat generation of the input reactor 7 and the rectifier bridge 6, so that the flow into the fourth branch flow channel 152 is greater than the flow into the third branch flow channel 151; the flow is reasonably distributed, and the radiating effect is improved.

[0047] In a preferred embodiment, as shown in Figure 3 The guide liquid flow cavity 11 is divided into the first branch flow channel 111 and the second branch flow channel 112 by the first flow distribution plate 113, the first radiating cavity 12 is provided with the first flow distribution inlet 121 communicated with the first branch flow channel 111 and the first flow distribution outlet 122 communicated with the third radiating cavity 14; and the second radiating cavity 13 is provided with the second flow distribution inlet communicated with the second branch flow channel 112 and the second flow distribution outlet communicated with the third radiating cavity 14.

[0048] Specifically, the cooling liquid flows into the first and second radiating cavities 12 and 13 through the first and second branch flow channels 111 and 112 and the first and second branch inlets 121 and 122, respectively, to achieve the heat dissipation of the power unit 3 and the filter capacitor 4; the cooling liquid flows into the third radiating cavity 14 from the first and second branch outlets 122 and 123 after flowing through the first and second radiating cavities 12 and 13; the flow rates of the cooling liquid flowing into the first and second branch flow channels 111 and 112 can be reasonably distributed according to the heat generated by the power unit 3 and the filter capacitor 4; when the flow channels are designed, the inlet areas of the first and second branch flow channels 111 and 112 can be changed by changing the position of the first branch plate 113 in the liquid introduction flow cavity 11, so as to change the flow rates of the cooling liquid flowing into the first and second branch flow channels 111 and 112, reasonably distribute the flow rates, and improve the heat dissipation effect.

[0049] In a preferred embodiment, as shown in Figure 2 and Figure 3 , the first and second flow guide channels 23 and 24 are arranged at the two ends of the fourth radiating cavity 22 in the placing block 2, the third radiating cavity 14 communicates with the fourth radiating cavity 22 through the first flow guide channel 23, and the fifth radiating cavity 15 communicates with the fourth radiating cavity 22 through the second flow guide channel 24.

[0050] Specifically, the cooling liquid flows into the first flow guide channel 23 from bottom to top in the third radiating cavity 14, then flows into the second flow guide channel 24 from top to bottom after flowing through the fourth radiating cavity 22, and then flows into the fifth radiating cavity 15 after flowing through the second flow guide channel 24, to achieve the heat dissipation of the film capacitor 8, the DC reactor 9, and the contactor 5; and the third radiating cavity 14, the first flow guide channel 23, the fourth radiating cavity 22, the second flow guide channel 24, and the fifth radiating cavity 15 are arranged in a three-dimensional manner to surround the film capacitor 8 and the DC reactor 9, which to some extent improves the heat dissipation effect of the film capacitor 8 and the DC reactor 9.

[0051] In a preferred embodiment, as shown in Figure 2 and Figure 3 , the liquid outlet end of the fifth radiating cavity 15 is divided into the third and fourth branch flow channels 151 and 152, the sixth and seventh radiating cavities 16 and 17 through the second branch plate 153, the third branch flow channel 151 communicates with the sixth radiating cavity 16, and the fourth branch flow channel 152 communicates with the seventh radiating cavity 17.

[0052] Specifically, the cooling liquid is divided into two paths from the liquid outlet end of the fifth heat dissipation cavity 15, one path flows into the third branch flow channel 151 and the sixth heat dissipation cavity 16 to realize heat dissipation of the rectifier bridge 6, and the other path flows into the fourth branch flow channel 152 and the seventh heat dissipation cavity 17 to realize heat dissipation of the input reactor 7; the cooling liquid flows into the lead-out liquid flow cavity 18 through the sixth heat dissipation cavity 16, and the cooling liquid flows into the lead-out liquid flow cavity 18 after flowing through the seventh heat dissipation cavity 17; similarly, the flow of the cooling liquid flowing into the third branch flow channel 151 and the fourth branch flow channel 152 can be reasonably distributed according to the heat generated by the rectifier bridge 6 and the input reactor 7; when designing the flow channel, the inlet area of the third branch flow channel 151 and the fourth branch flow channel 152 can be changed by changing the position of the second flow distribution plate 153, so as to change the flow of the cooling liquid flowing into the sixth heat dissipation cavity 16 and the seventh heat dissipation cavity 17, reasonably distribute the flow, and improve the heat dissipation effect.

[0053] In the description of the present specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the description of the present specification, the description of the terms "one embodiment", "some embodiments" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A branched liquid cooling flow path for a frequency converter, the frequency converter including a liquid cooling plate, a placement block provided integrally with the liquid cooling plate, and a plurality of electronic components provided on the liquid cooling plate and the placement block, characterized by, The branched liquid cooling flow channel comprises a liquid inlet flow cavity, a first heat dissipation cavity, a second heat dissipation cavity, a third heat dissipation cavity, a fifth heat dissipation cavity, a sixth heat dissipation cavity, a seventh heat dissipation cavity, a liquid outlet flow cavity arranged in the liquid cooling plate, and a fourth heat dissipation cavity arranged in the placement block. The liquid inlet flow cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity and the liquid outlet flow cavity are arranged in series. The first heat dissipation cavity and the second heat dissipation cavity are arranged side by side between the liquid inlet flow cavity and the third heat dissipation cavity. The liquid inlet end of the liquid inlet flow cavity is communicated with the cooling liquid inlet arranged on the liquid cooling plate. The liquid outlet end of the liquid inlet flow cavity is branched to form a first branch flow channel and a second branch flow channel. The first branch flow channel is communicated with the liquid inlet end of the first heat dissipation cavity. The second branch flow channel is communicated with the liquid inlet end of the second heat dissipation cavity. The liquid outlet ends of the first heat dissipation cavity and the second heat dissipation cavity are both communicated with the liquid inlet end of the third heat dissipation cavity. The sixth heat dissipation cavity and the seventh heat dissipation cavity are arranged side by side between the fifth heat dissipation cavity and the liquid outlet flow cavity. The liquid outlet end of the fifth heat dissipation cavity is branched to form a third branch flow channel and a fourth branch flow channel. The third branch flow channel is communicated with the liquid inlet end of the sixth heat dissipation cavity. The fourth branch flow channel is communicated with the liquid inlet end of the seventh heat dissipation cavity. The liquid outlet ends of the sixth heat dissipation cavity and the seventh heat dissipation cavity are both communicated with the liquid inlet end of the liquid outlet flow cavity. The liquid outlet end of the liquid outlet flow cavity is communicated with the cooling liquid outlet arranged on the liquid cooling plate. The first heat dissipation cavity, the second heat dissipation cavity, the third heat dissipation cavity, the fourth heat dissipation cavity, the fifth heat dissipation cavity, the sixth heat dissipation cavity and the seventh heat dissipation cavity are respectively located above or below the corresponding electronic elements for heat dissipation.

2. The branched liquid cooling flow channel for a frequency converter according to claim 1, characterized in that, The first branch flow channel and the second branch flow channel are branched in the liquid inlet flow cavity by a first flow branching plate. A first flow branching inlet of the first branch flow channel and a first flow branching outlet communicated with the third heat dissipation cavity are arranged on the first heat dissipation cavity. A second flow branching inlet of the second branch flow channel and a second flow branching outlet communicated with the third heat dissipation cavity are arranged on the second heat dissipation cavity.

3. The branched liquid cooling flow channel for a frequency converter according to claim 2, characterized in that, First and second flow guide channels are arranged at both ends of the fourth heat dissipation cavity in the placement block. The third heat dissipation cavity is communicated with the fourth heat dissipation cavity through the first flow guide channel. The fifth heat dissipation cavity is communicated with the fourth heat dissipation cavity through the second flow guide channel.

4. The branched liquid cooling flow channel for a frequency converter according to claim 3, wherein The liquid outlet end of the fifth heat dissipation cavity is branched to form the third branch flow channel, the fourth branch flow channel, the sixth heat dissipation cavity and the seventh heat dissipation cavity by a second flow branching plate. The third branch flow channel is communicated with the sixth heat dissipation cavity. The fourth branch flow channel is communicated with the seventh heat dissipation cavity.

5. The branched liquid cooling flow channel for a frequency converter according to claim 3, wherein A receiving cavity for placing electronic elements is arranged in the placement block.

Images