Branched liquid cooling flow channel for frequency converter

Abstract

The invention discloses a branch type liquid cooling flow channel for a frequency converter. The branch type liquid cooling flow channel comprises a leading-in liquid 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 leading-out liquid flow cavity and a fourth heat dissipation cavity, 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. Through the combination of series connection and parallel connection, the cooling liquid flow in the multiple heat dissipation cavities is reasonably distributed, the heat dissipation effect is improved, and the occupied space is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of frequency converter heat dissipation, and in particular to a branch type liquid cooling channel for a frequency converter. Background Art

[0002] As the power of the inverter increases, the heat generated by its internal components is also increasing. If the heat cannot be dissipated in time, the inverter will alarm and shut down. Liquid cooling has the advantages of high heat dissipation efficiency, low noise, and low dependence on the environment. It is widely used in the field of inverter heat dissipation.

[0003] When liquid cooling is adopted, the form of the liquid cooling flow channel arranged on the liquid cooling plate determines the efficiency of the liquid cooling. Common flow channels include series flow channels and parallel flow channels. When only series flow channels are adopted, the coolant flow rate in each heat dissipation cavity in the series flow channel is the same, but as the flow channel becomes longer, the coolant temperature in the heat dissipation cavity at the rear end increases, making the temperature difference of the coolant in the front and rear heat dissipation cavities too large, thereby reducing the heat dissipation capacity of the liquid cooling plate; when only parallel flow channels are used, the parallel flow channels occupy a large space and have a large flow resistance, thereby requiring the use of a high-power pump; therefore, in order to solve the above problems, the present application proposes a branch-type liquid cooling flow channel for a frequency converter. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a branch-type liquid cooling channel for an inverter, which reasonably distributes the coolant flow in multiple heat dissipation cavities through a combination of series and parallel forms, thereby improving the heat dissipation effect and reducing the occupied space.

[0005] The present invention provides a branch-type liquid-cooling flow channel for a frequency converter, the frequency converter comprising a liquid-cooling plate, a placement block integrally formed with the liquid-cooling plate, and a plurality of electronic components arranged on the liquid-cooling plate and the placement block, characterized in that the branch-type liquid-cooling flow channel comprises an inlet liquid 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, an outlet liquid flow cavity arranged in the liquid-cooling plate, and a fourth heat dissipation cavity arranged in the placement block;

[0006] The inlet liquid flow chamber, the third heat dissipation chamber, the fourth heat dissipation chamber, the fifth heat dissipation chamber and the outlet liquid flow chamber are connected in series;

[0007] The first heat dissipation cavity and the second heat dissipation cavity are arranged in parallel between the liquid introduction cavity and the third heat dissipation cavity, the liquid inlet end of the liquid introduction cavity is connected to the coolant inlet provided on the cooling plate, the liquid outlet end of the liquid introduction cavity is split to form a first branch flow channel and a second branch flow channel, the first branch flow channel is connected to the liquid inlet end of the first heat dissipation cavity, the second branch flow channel is connected to 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 both connected to the liquid inlet end of the third heat dissipation cavity;

[0008] The sixth heat dissipation chamber and the seventh heat dissipation chamber are arranged in parallel between the fifth heat dissipation chamber and the derivation liquid flow chamber, the liquid outlet end of the fifth heat dissipation chamber is split to form a third branch flow channel and a fourth branch flow channel, the third branch flow channel is connected to the liquid inlet end of the sixth heat dissipation chamber, the fourth branch flow channel is connected to the liquid inlet end of the seventh heat dissipation chamber, the liquid outlet ends of the sixth heat dissipation chamber and the seventh heat dissipation chamber are both connected to the liquid inlet end of the derivation liquid flow chamber, and the liquid outlet end of the derivation liquid flow chamber is connected to the coolant outlet provided on the 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 corresponding electronic components, and are used to dissipate heat for multiple electronic components.

[0010] Furthermore, the introduced liquid flow cavity is split by the first splitter plate to form the first branch flow channel and the second branch flow channel, and the first heat dissipation cavity is provided with a first splitter inlet connected to the first branch flow channel and a first splitter outlet connected to the third heat dissipation cavity; the second heat dissipation cavity is provided with a second splitter inlet connected to the second branch flow channel and a second splitter outlet connected to the third heat dissipation cavity.

[0011] Furthermore, a first guide channel and a second guide channel are provided at both ends of the fourth heat dissipation cavity in the placement block, the third heat dissipation cavity is connected with the fourth heat dissipation cavity through the first guide channel, and the fifth heat dissipation cavity is connected with the fourth heat dissipation cavity through the second guide channel.

[0012] Furthermore, the liquid outlet end of the fifth heat dissipation cavity is split by a second diverter plate to form the third branch flow channel, the fourth branch flow channel, the sixth heat dissipation cavity and the seventh heat dissipation cavity, the third branch flow channel is connected to the sixth heat dissipation cavity, and the fourth branch flow channel is connected to the seventh heat dissipation cavity.

[0013] Furthermore, a storage cavity for placing electronic components is provided in the placement block.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The present invention includes an inlet liquid flow chamber, a first heat dissipation chamber, a second heat dissipation chamber, a third heat dissipation chamber, a fourth heat dissipation chamber, a fifth heat dissipation chamber, a sixth heat dissipation chamber, a seventh heat dissipation chamber and an outlet liquid flow chamber, wherein the inlet liquid flow chamber, the third heat dissipation chamber, the fourth heat dissipation chamber, the fifth heat dissipation chamber and the outlet liquid flow chamber are connected in series, the first heat dissipation chamber and the second heat dissipation chamber are arranged in parallel between the inlet liquid flow chamber and the third heat dissipation chamber, the sixth heat dissipation chamber and the seventh heat dissipation chamber are arranged in parallel between the fifth heat dissipation chamber and the outlet liquid flow chamber, and the first heat dissipation chamber, the second heat dissipation chamber, the third heat dissipation chamber, the fifth heat dissipation chamber, the sixth heat dissipation chamber and the seventh heat dissipation chamber are respectively located above or below corresponding electronic components to dissipate heat for corresponding electronic components; the cooling liquid is divided from the inlet liquid flow chamber, one way flows into the first heat dissipation chamber, and the other way flows into the second heat dissipation chamber, and the cooling liquid is divided from the first heat dissipation chamber After flowing into the second heat dissipation cavity, the coolant flows into the third heat dissipation cavity and merges therewith, flows out from the third heat dissipation cavity after merging, flows through the fourth heat dissipation cavity and the fifth heat dissipation cavity in sequence, and the coolant flows into two paths again after flowing from the fifth heat dissipation cavity, one path flows into the sixth heat dissipation cavity, and the other path flows into the seventh heat dissipation cavity. After flowing in the sixth heat dissipation cavity and the seventh heat dissipation cavity, the coolant flows into the outlet liquid flow cavity, and flows out from the coolant outlet through the outlet liquid flow cavity. During the flow, the coolant dissipates heat for multiple electronic components installed on the cooling plate and the placement block; the multiple heat dissipation cavities of the present application are arranged in a combination of series and parallel connection. Compared with flow channels only connected in series, the length of the flow channels is shortened to avoid excessive temperature difference of the coolant in the front and rear heat dissipation cavities due to excessive length of the flow channels, thereby improving the heat dissipation effect and reducing the space occupied by the flow channels compared with flow channels only connected in parallel.

[0016] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 It is a schematic diagram of the top structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the bottom structure of the present invention;

[0021] Figure 4 A schematic diagram of the structure of installing electrical components of the present invention;

[0022] Numbers in the figure: 1, liquid cooling plate; 2, placement block; 3, power unit; 4, filter capacitor; 5, contactor; 6, rectifier bridge; 7, input reactor; 8, membrane capacitor; 9, DC reactor;

[0023] 11. Liquid inlet chamber; 12. First heat dissipation chamber; 13. Second heat dissipation chamber; 14. Third heat dissipation chamber; 15. Fifth heat dissipation chamber; 16. Sixth heat dissipation chamber; 17. Seventh heat dissipation chamber; 18. Liquid outlet chamber; 19. Coolant inlet; 110. Coolant outlet;

[0024] 21. Storage chamber; 22. Fourth heat dissipation chamber; 23. First flow guide channel; 24. Second flow guide channel;

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

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

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

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Please refer to Figure 1 to Figure 4 , an embodiment of the present invention provides a branch-type liquid cooling channel for a frequency converter, which is used to dissipate heat from electronic components on the frequency converter;

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

[0032] The branch-type liquid cooling channel includes 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 and a fourth heat dissipation cavity 22 arranged in the placement block 2.

[0033] Specifically, the bottom of the liquid cooling plate 1 is recessed inward to form an inlet liquid flow cavity 11, 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 and an outlet liquid flow cavity 18, the top of the liquid cooling plate 1 is recessed inward to form a first heat dissipation cavity 12, the top of the placement block 2 is recessed inward to form a fourth heat dissipation cavity 22, the bottom of the liquid cooling plate 1 is sealed with a lower cover plate, and the top of the placement block 2 is sealed with an upper cover plate;

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

[0035] The first heat dissipation chamber 12 and the second heat dissipation chamber 13 are arranged in parallel between the liquid introduction chamber 11 and the third heat dissipation chamber 14. The liquid inlet end of the liquid introduction chamber 11 is connected to the coolant inlet 19 provided on the cooling plate 1. The liquid outlet end of the liquid introduction chamber 11 is split to form a first branch channel 111 and a second branch channel 112. The first branch channel 111 is connected to the liquid inlet end of the first heat dissipation chamber 12, and the second branch channel 112 is connected to the liquid inlet end of the second heat dissipation chamber 13. The liquid outlet ends of the first heat dissipation chamber 12 and the second heat dissipation chamber 13 are both connected to the liquid inlet end of the third heat dissipation chamber 14.

[0036] The sixth heat dissipation chamber 16 and the seventh heat dissipation chamber 17 are arranged in parallel between the fifth heat dissipation chamber 15 and the derivation liquid flow chamber 18. The liquid outlet of the fifth heat dissipation chamber 15 is split to form a third branch flow channel 151 and a fourth branch flow channel 152. The third branch flow channel 151 is connected to the liquid inlet end of the sixth heat dissipation chamber 16, and the fourth branch flow channel 152 is connected to the liquid inlet end of the seventh heat dissipation chamber 17. The liquid outlet ends of the sixth heat dissipation chamber 16 and the seventh heat dissipation chamber 17 are both connected to the liquid inlet end of the derivation liquid flow chamber 18, and the liquid outlet end of the derivation liquid flow chamber 18 is connected to the coolant outlet 110 provided on the 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 for the multiple electronic components.

[0038] Specifically, the first heat dissipation cavity 12 is located below the power unit 3, the power unit 3 is fixed to the top of the liquid cooling plate 1 by bolts, and the cylindrical pins of the power unit 3 are embedded in the first heat dissipation cavity 12, and the coolant 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 coolant dissipates heat for the filter capacitor 4 when flowing through the second heat dissipation cavity 13;

[0040] The third heat dissipation cavity 14 is located below the membrane capacitor 8. The membrane capacitor is embedded in the storage cavity 21 in the placement block 2. After being embedded, it is fixed with thermal conductive glue. When the coolant flows through the third heat dissipation cavity 14, the membrane capacitor 8 is cooled.

[0041] The fourth heat dissipation cavity 22 is located above the DC reactor 9. The DC reactor 9 is also embedded in the storage cavity 21 in the placement block 2. After being embedded, it is fixed with thermal conductive glue. When the coolant flows through the fourth heat dissipation cavity 22, the DC reactor 9 and the membrane capacitor 8 are cooled.

[0042] The fifth heat dissipation cavity 15 is located below the contactor 5. The contactor 5 is fixed to the top of the liquid cooling plate 1 by bolts. When the coolant flows through the fifth heat dissipation cavity 15, the contactor 5 is cooled.

[0043] The sixth heat dissipation cavity 16 is located below the rectifier bridge 6. The rectifier bridge 6 is fixed to the top of the liquid cooling plate 1 by bolts. When the coolant flows through the sixth heat dissipation cavity 16, the rectifier bridge 6 is cooled.

[0044] The seventh heat dissipation cavity 17 is located below the input reactor 7. The input reactor 7 is fixed to the top of the liquid cooling plate 1 by bolts. When the coolant flows through the seventh heat dissipation cavity 17, the input reactor 7 is cooled.

[0045] During heat dissipation, the coolant flows from the coolant inlet 19 into the liquid flow inlet chamber 11, and is split in the liquid flow inlet chamber 11, one path flows into the first heat dissipation chamber 12, and the other path flows into the second heat dissipation chamber 13, to dissipate heat for the power unit 3 and the filter capacitor 4; flows from the first heat dissipation chamber 12 and the second heat dissipation chamber 13, and then flows into the third heat dissipation chamber 14 to merge, to dissipate heat for the membrane capacitor 8; flows from the third heat dissipation chamber 14, and then flows through the fourth heat dissipation chamber and the fifth heat dissipation chamber in turn, to dissipate heat for the DC reactor 9 and the contactor 5; flows from the fifth heat dissipation chamber 15, and then is split into two paths again, one path flows into the sixth heat dissipation chamber 16, and the other path flows into the seventh heat dissipation chamber 18. The cooling liquid flows into the sixth heat dissipation cavity 16 and the seventh heat dissipation cavity 17, and then flows into the outlet liquid flow cavity 18, and flows out from the cooling liquid outlet 110 through the outlet liquid flow cavity 18. During the flow, the cooling liquid dissipates heat for multiple electronic components installed on the cooling plate 1. The multiple heat dissipation cavities of the present application are arranged in a combination of series and parallel connection. Compared with the flow channels only connected in series, the length of the flow channels is shortened, and the flow channels are too long to avoid excessive temperature difference of the coolant in the front and rear heat dissipation cavities, thereby improving the heat dissipation effect. Compared with the flow channels only connected in parallel, the space occupied by the flow channels is reduced.

[0046] It should be noted that the heat generation and temperature sensitivity of the power unit 3, filter capacitor 4, contactor 5, rectifier bridge 6, input inductor 7, membrane capacitor 8 and DC inductor 9 are all simulated in the heat dissipation simulation software. According to the simulation data, the heat generation of the power unit 3 is higher and the heat generation of the filter capacitor 4 is lower. The coolant flow rate flowing into the first branch channel 111 and the second branch 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 rate flowing into the first branch channel 111 is greater than the flow rate flowing into the second branch channel 112; similarly, according to the simulation structure, the heat generation of the input inductor 7 is higher than the heat generation of the rectifier bridge 6, and the coolant flow rate flowing into the fourth branch channel 152 and the third branch channel 151 can be reasonably distributed according to the heat generation of the input inductor 7 and the rectifier bridge 6, so that the flow rate flowing into the fourth branch channel 152 is greater than the flow rate flowing into the third branch channel 151; the flow rate is reasonably distributed to improve the heat dissipation effect.

[0047] In a preferred embodiment, if Figure 3 As shown, the liquid flow chamber 11 is introduced into the liquid flow chamber 11 and is split by the first splitter plate 113 to form a first branch flow channel 111 and a second branch flow channel 112. The first heat dissipation chamber 12 is provided with a first splitter inlet 121 connected to the first branch flow channel 111 and a first splitter outlet 122 connected to the third heat dissipation chamber 14; the second heat dissipation chamber 13 is provided with a second splitter inlet connected to the second branch flow channel 112 and a second splitter outlet connected to the third heat dissipation chamber 14.

[0048] Specifically, the coolant flows into the liquid inlet 110 and then is divided into two paths. One path flows into the first heat dissipation cavity 12 through the first branch channel 111 and the first branch inlet 121 to achieve heat dissipation of the power unit 3, and the other path flows into the second heat dissipation cavity 13 through the second branch channel 112 and the second branch inlet to achieve heat dissipation of the filter capacitor 4; the coolant flows through the first heat dissipation cavity 12 and then flows into the third heat dissipation cavity 14 from the first branch outlet 122, and the coolant flows through the second heat dissipation cavity 13 and then flows into the third heat dissipation cavity 14 from the second branch outlet; the coolant flow rate flowing into the first branch channel 111 and the second branch channel 112 can be reasonably distributed according to the heat generation of the power unit 3 and the filter capacitor 4; when designing the flow channel, the inlet area of ​​the first branch channel 111 and the second branch channel 112 can be changed by changing the position of the first diverter plate 113 in the liquid inlet cavity 11, thereby changing the coolant flow rate flowing into the first branch channel 111 and the second branch channel, reasonably distributing the flow rate, and improving the heat dissipation effect.

[0049] In a preferred embodiment, if Figure 2 and Figure 3 As shown, a first guide channel 23 and a second guide channel 24 are provided at both ends of the fourth heat dissipation cavity 22 in the placement block 2, the third heat dissipation cavity 14 is connected with the fourth heat dissipation cavity 22 through the first guide channel 23, and the fifth heat dissipation cavity 15 is connected with the fourth heat dissipation cavity 22 through the second guide channel 24.

[0050] Specifically, the coolant flows from the third heat dissipation cavity 14 into the first guide channel 23 from bottom to top, then flows through the fourth heat dissipation cavity 22 and then flows into the second guide channel 24 from top to bottom, and then flows into the fifth heat dissipation cavity 15 after passing through the second guide channel 24, thereby achieving heat dissipation of the membrane capacitor 8, the DC reactor 9, and the contactor 5; and the third heat dissipation cavity 14, the first guide channel 23, the fourth heat dissipation cavity 22, the second guide channel 24 and the fifth heat dissipation cavity 15 are three-dimensionally arranged to surround the membrane capacitor 8 and the DC reactor 9, thereby improving the heat dissipation effect of the membrane capacitor 8 and the DC reactor 9 to a certain extent.

[0051] In a preferred embodiment, if Figure 2 and Figure 3 As shown, the liquid outlet end of the fifth heat dissipation chamber 15 is divided by the second diverter plate 153 to form a third branch channel 151, a fourth branch channel 152, a sixth heat dissipation chamber 16 and a seventh heat dissipation chamber 17. The third branch channel 151 is connected to the sixth heat dissipation chamber 16, and the fourth branch channel 152 is connected to the seventh heat dissipation chamber 17.

[0052] Specifically, the coolant is divided into two paths from the liquid outlet end of the fifth heat dissipation chamber 15, one path flows into the third branch flow channel 151 and the sixth heat dissipation chamber 16 to achieve heat dissipation of the rectifier bridge 6, and the other path flows into the fourth branch flow channel 152 and the seventh heat dissipation chamber 17 to achieve heat dissipation of the input inductor 7; the coolant flows through the sixth heat dissipation chamber 16 and flows into the outlet liquid flow chamber 18, and the coolant flows through the seventh heat dissipation chamber 17 and then flows into the outlet liquid flow chamber 18; similarly, the coolant flow rate flowing into the third branch flow channel 151 and the fourth branch flow channel 152 can be reasonably distributed according to the heat generation of the rectifier bridge 6 and the input inductor 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 diverter plate 153, thereby changing the coolant flow rate flowing into the sixth heat dissipation chamber 16 and the seventh heat dissipation chamber 17, reasonably distributing the flow rate, and improving the heat dissipation effect.

[0053] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation 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 are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 branch-type liquid cooling channel for a frequency converter, the frequency converter comprising a liquid cooling plate, a placement block integrally formed with the liquid cooling plate, and a plurality of electronic components arranged on the liquid cooling plate and the placement block, characterized in that: The branch-type liquid cooling channel includes an inlet liquid 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, an outlet liquid flow cavity and a fourth heat dissipation cavity arranged in the placement block. The inlet liquid flow chamber, the third heat dissipation chamber, the fourth heat dissipation chamber, the fifth heat dissipation chamber and the outlet liquid flow chamber are connected in series; The first heat dissipation cavity and the second heat dissipation cavity are arranged in parallel between the liquid introduction cavity and the third heat dissipation cavity, the liquid inlet end of the liquid introduction cavity is connected to the coolant inlet provided on the cooling plate, the liquid outlet end of the liquid introduction cavity is split to form a first branch flow channel and a second branch flow channel, the first branch flow channel is connected to the liquid inlet end of the first heat dissipation cavity, the second branch flow channel is connected to 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 both connected to the liquid inlet end of the third heat dissipation cavity; The sixth heat dissipation chamber and the seventh heat dissipation chamber are arranged in parallel between the fifth heat dissipation chamber and the derivation liquid flow chamber, the liquid outlet end of the fifth heat dissipation chamber is split to form a third branch flow channel and a fourth branch flow channel, the third branch flow channel is connected to the liquid inlet end of the sixth heat dissipation chamber, the fourth branch flow channel is connected to the liquid inlet end of the seventh heat dissipation chamber, the liquid outlet ends of the sixth heat dissipation chamber and the seventh heat dissipation chamber are both connected to the liquid inlet end of the derivation liquid flow chamber, and the liquid outlet end of the derivation liquid flow chamber is connected to the coolant outlet provided on the 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 corresponding electronic components and are used to dissipate heat for the electronic components.

2. A branch type liquid cooling channel for a frequency converter according to claim 1, characterized in that: The inlet liquid flow cavity is split by the first diverter plate to form the first branch flow channel and the second branch flow channel, the first heat dissipation cavity is provided with a first diverter inlet connected to the first branch flow channel and a first diverter outlet connected to the third heat dissipation cavity; the second heat dissipation cavity is provided with a second diverter inlet connected to the second branch flow channel and a second diverter outlet connected to the third heat dissipation cavity.

3. A branch type liquid cooling channel for a frequency converter according to claim 2, characterized in that: A first guide channel and a second guide channel are provided at both ends of the fourth heat dissipation cavity in the placement block, the third heat dissipation cavity is connected with the fourth heat dissipation cavity through the first guide channel, and the fifth heat dissipation cavity is connected with the fourth heat dissipation cavity through the second guide channel.

4. A branch type liquid cooling channel for a frequency converter according to claim 3, characterized in that: The liquid outlet end of the fifth heat dissipation cavity is split by the second diverter plate to form the third branch flow channel, the fourth branch flow channel, the sixth heat dissipation cavity and the seventh heat dissipation cavity. The third branch flow channel is connected to the sixth heat dissipation cavity, and the fourth branch flow channel is connected to the seventh heat dissipation cavity.

5. The branch type liquid cooling channel for a frequency converter according to claim 3, characterized in that: The placement block is provided with a storage cavity for placing electronic components.

Images