High-efficiency double-sided liquid cooling frequency converter

Abstract

The utility model discloses a high-efficiency double-sided liquid cooling frequency converter, which comprises a shell. A liquid cooling plate is fixedly arranged in the shell, and a silicon carbide module is fixedly arranged on the first mounting surface; a PCBA board is arranged on the side, away from the liquid cooling plate, of the silicon carbide module. A film capacitor is fixedly arranged on the second mounting surface; a rectifier bridge and a contactor are fixedly arranged above the membrane capacitor; the liquid cooling channel comprises a plurality of vertical channels which are distributed in parallel, and the top ends or the bottom ends of the adjacent vertical channels are communicated through transverse channels, so that the liquid cooling channel is S-shaped. According to the frequency converter of the utility model, the layout of the internal structure of the frequency converter is optimized, the liquid cooling plate can cool the electrical components at the two sides at the same time, the cooling efficiency is improved, the equipment size is reduced, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field especially relates to a high -efficient double -faced liquid cooling frequency converter. BACKGROUND

[0002] Variable-frequency Drive (VFD) is application frequency conversion technology and microelectronic technology, through the way of changing motor working power frequency to control the electric power control equipment of alternating -current motor. The existing frequency converter water cooling system or air cooling system mostly mainly gives IGBT module or silicon carbide module to radiate, the rest device such as rectifier bridge, contactor, capacitor etc. are not radiated. Liquid cooling plate is flat plate structure, usually only in liquid cooling plate single side places power module and electrical device, like this, if want to radiate the situation of other devices inside frequency converter, flow passage area needs to expand, flow passage is more complex, the volume of complete machine also can increase, and the utilization rate of liquid cooling plate heat dissipation system is low, and the cost is higher. SUMMARY

[0003] In view of above-mentioned defects or insufficient in prior art, it is expected to provide a high -efficient double -faced liquid cooling frequency converter, the layout of the internal structure of frequency converter is optimized, the cooling of electrical components on both sides of liquid cooling plate is realized, the cooling efficiency is improved, the equipment volume is reduced, and the cost is reduced.

[0004] The utility model provides a high -efficient double -faced liquid cooling frequency converter, including the shell, the shell is fixedly arranged with liquid cooling plate in, the liquid cooling plate has opposite first installation surface and second installation surface, the bottom of liquid cooling plate one end is provided with liquid inlet, and the other end is provided with liquid outlet, liquid cooling channel is provided with in the liquid cooling plate respectively with liquid inlet and liquid outlet link and continue to be arranged, and the liquid cooling channel is provided with in the liquid cooling plate respectively with liquid inlet and liquid outlet link and continue to be arranged, and the liquid cooling channel is provided with in the liquid cooling plate respectively with liquid inlet and liquid outlet link and continue to be arranged,

[0005] The first installation surface is fixedly provided with silicon carbide module, and the silicon carbide module is provided with PCBA board on the side away from the liquid cooling plate, and the PCBA board is fixedly connected with the liquid cooling plate through screw,

[0006] The second installation surface is fixedly provided with film capacitor above the liquid inlet and liquid outlet, and the second installation surface is fixedly provided with rectifier bridge and contactor above the film capacitor, and pre-charging resistance is fixedly arranged on the side of the film capacitor, the rectifier bridge is located above the liquid inlet, and the contactor is located above the liquid outlet,

[0007] The liquid cooling channel comprises a plurality of vertically distributed vertical channels, and the top end or the bottom end of adjacent vertical channels is connected by a horizontal channel, so that the liquid cooling channel is S-shaped; the part of the first mounting surface corresponding to the silicon carbide module is a silicon carbide heat dissipation area, and the liquid cooling channel continuously and reciprocally passes through the silicon carbide heat dissipation area; the part of the second mounting surface corresponding to the film capacitor is a film capacitor heat dissipation area, and the liquid cooling channel continuously and reciprocally passes through the film capacitor heat dissipation area; the part of the second mounting surface corresponding to the rectifier bridge is a rectifier bridge heat dissipation area; and the part of the second mounting surface corresponding to the contactor is a contactor heat dissipation area.

[0008] Further, the shell comprises a frame, a front cover plate arranged on the front side of the frame, and a rear cover plate arranged on the rear side of the frame; the front cover plate and the rear cover plate are fixedly connected with the frame by screws; sealing strips are arranged between the front cover plate and the frame and between the rear cover plate and the frame, respectively; an installation plate is fixedly connected to the rear side of the top of the frame, and a mounting hole is formed in the installation plate.

[0009] Further, an input interface, an output interface and a communication interface are fixedly arranged on one side of the shell, and the input interface, the output interface and the communication interface are electrically connected with the PCBA board, respectively.

[0010] Further, the liquid inlet is fixedly connected with a liquid inlet connector extending from the bottom of the shell, and the liquid outlet is fixedly connected with a liquid outlet connector extending from the bottom of the shell.

[0011] Further, the silicon carbide module, the film capacitor and the rectifier bridge are electrically connected with the PCBA board, respectively; and the contactor is electrically connected with the film capacitor, the rectifier bridge and the pre-charging resistor, respectively.

[0012] Further, a receiving groove is formed in the first mounting surface, the liquid cooling channel is arranged in the receiving groove, a sealing cover plate is fixedly installed on the receiving groove by screws, and a sealing ring is arranged around the liquid cooling channel between the sealing cover plate and the receiving groove.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The frequency converter of the utility model places silicon carbide module and PCBA board on the first installation surface of liquid cooling plate, places film capacitor, rectifier bridge, contactor and pre-charge resistor on the second installation surface of liquid cooling plate; liquid cooling plate adopts single-layer flat plate structure, forms silicon carbide heat dissipation area on the first installation surface through the arrangement of liquid cooling channel, forms film capacitor heat dissipation area, rectifier bridge heat dissipation area and contactor heat dissipation area on the second installation surface.

[0015] 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

[0016] Other features, objects and advantages of the utility model will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 It is a structural schematic diagram of high-efficiency double-sided liquid cooling frequency converter;

[0018] Figure 2 It is an element structure schematic diagram of the first installation surface of liquid cooling plate;

[0019] Figure 3 It is an element structure schematic diagram of the second installation surface of liquid cooling plate;

[0020] Figure 4 It is a side view structure schematic diagram of internal elements of frequency converter;

[0021] Figure 5 It is a structure schematic diagram of liquid cooling channel.

[0022] Reference signs in the drawings: 1, shell; 2, liquid cooling plate; 3, silicon carbide module; 4, PCBA board; 5, film capacitor; 6, rectifier bridge; 7, contactor; 8, pre-charge resistor;

[0023] 11, frame; 12, front cover plate; 13, rear cover plate; 14, mounting plate; 15, mounting hole; 16, input interface; 17, output interface; 18, communication interface;

[0024] 21, first installation surface; 22, second installation surface; 23, liquid inlet; 24, liquid outlet; 25, liquid cooling channel; 26, liquid inlet nozzle; 27, liquid outlet nozzle; 28, storage groove; 29, sealing cover plate;

[0025] 251 vertical passage; 252 horizontal passage. DETAILED DESCRIPTION

[0026] The utility model will be explained in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description.

[0027] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be explained in detail below in combination with the drawings and embodiments.

[0028] Please refer to Figures 1-5 The embodiment of the utility model provides a kind of high-efficiency double-sided liquid cooling frequency converter, including shell 1;Liquid cooling plate 2 is fixedly arranged in shell 1, and liquid cooling plate 2 has opposite first installation surface 21 and second installation surface 22;One end of the bottom of liquid cooling plate 2 is provided with inlet 23, and the other end is provided with outlet 24;Liquid cooling channel 25 that is communicated with inlet 23 and outlet 24 respectively is provided in liquid cooling plate 2;

[0029] Silicon carbide module 3 is fixedly arranged on first installation surface 21;PCBA board 4 is provided on the side of silicon carbide module 3 away from liquid cooling plate 2, and PCBA board 4 is fixedly connected with liquid cooling plate 2 by screw;

[0030] Membrane capacitor 5 is fixedly arranged on second installation surface 22 and located above inlet 23 and outlet 24;Rectifier bridge 6 and contactor 7 are fixedly arranged on second installation surface 22 and located above membrane capacitor 5, and pre-charging resistance 8 is fixedly arranged on the side of membrane capacitor 5;Rectifier bridge 6 is located above inlet 23, and contactor 7 is located above outlet 24;

[0031] Liquid cooling channel 25 includes several parallel distributed vertical passages 251, and the top end or bottom end of adjacent vertical passage 251 is connected by horizontal passage 252, so that liquid cooling channel 25 is S-shaped;The part of first installation surface 21 corresponding to silicon carbide module 3 is silicon carbide heat dissipation area, and liquid cooling channel 25 continuously reciprocates through silicon carbide heat dissipation area;The part of second installation surface 22 corresponding to membrane capacitor 5 is membrane capacitor heat dissipation area, and liquid cooling channel 25 continuously reciprocates through membrane capacitor heat dissipation area;The part of second installation surface 22 corresponding to rectifier bridge 6 is rectifier bridge heat dissipation area;The part of second installation surface 22 corresponding to contactor 7 is contactor heat dissipation area.

[0032] In the embodiment, the liquid cooling plate 2 adopts a single-layer flat plate structure, the silicon carbide module 3 and the PCBA board 4 distributed inside and outside are arranged on the first mounting surface 21 of the liquid cooling plate 2, and the film capacitor 5, the rectifier bridge 6, the contactor 7 and the pre-charge resistor 8 are arranged on the second mounting surface 22 of the liquid cooling plate 2.

[0033] The liquid cooling channel 25 is arranged to continuously and reciprocally pass through the silicon carbide heat dissipation area to dissipate heat for the key heat generating device silicon carbide module 3; meanwhile, the liquid cooling channel 25 first passes through the film capacitor heat dissipation area, then passes through the rectifier bridge heat dissipation area, and then returns to the film capacitor heat dissipation area, and then passes through the contactor heat dissipation area to dissipate heat for the film capacitor 5, the rectifier bridge 6 and the contactor 7.

[0034] The cooling liquid flows through the liquid cooling channel 25 to dissipate heat for the electrical components on both sides of the liquid cooling plate 2, the area of the liquid cooling channel is reduced, the volume of the liquid cooling plate 2 is reduced, the overall volume of the frequency converter is reduced, the utilization rate of the liquid cooling channel 25 is improved, the utilization effect of the liquid cooling plate 2 is maximized, the processing cost and the material cost are saved, and the frequency converter has high popularization and application value.

[0035] In a preferred embodiment, as shown in Figure 1 The shell 1 includes a frame body 11, a front cover plate 12 arranged on the front side of the frame body 11 and a rear cover plate 13 arranged on the rear side of the frame body 11; the front cover plate 12 and the rear cover plate 13 are fixedly connected with the frame body 11 through screws; sealing strips are arranged between the front cover plate 12 and the frame body 11 and between the rear cover plate 13 and the frame body 11; a mounting plate 14 is fixedly connected to the rear side of the top of the frame body 11, and a mounting hole 15 is formed in the mounting plate 14.

[0036] In the embodiment, the electrical components of the frequency converter are packaged by the frame body 11, the front cover plate 12 and the rear cover plate 13, the front cover plate 12 and the rear cover plate 13 are sealed by the sealing strips, and the shell 1 is fixedly installed by the screws passing through the mounting hole 15, so that the installation is convenient and stable.

[0037] In a preferred embodiment, as shown in Figure 1 One side of the shell 1 is fixedly provided with an input interface 16, an output interface 17 and a communication interface 18, and the input interface 16, the output interface 17 and the communication interface 18 are electrically connected with the PCBA board 4.

[0038] In a preferred embodiment, as shown in Figure 1 and Figure 5 The liquid inlet 23 is fixedly connected with a liquid inlet connector 26 extending from the bottom of the shell 1, and the liquid outlet 24 is fixedly connected with a liquid outlet connector 27 extending from the bottom of the shell 1. One end of the liquid cooling channel 25 is connected with a cooling liquid input pipeline through the liquid inlet connector 26, and the other end is connected with a cooling liquid circulation pipeline through the liquid outlet connector 27, so that the circulation cooling is realized, and the heat dissipation effect is good.

[0039] In a preferred embodiment, as shown in Figure 2 and Figure 3 The silicon carbide module 3, the film capacitor 5 and the rectifier bridge 6 are respectively electrically connected with the PCBA board 4; the contactor 7 is respectively electrically connected with the film capacitor 5, the rectifier bridge 6 and the pre-charge resistor 8.

[0040] In a preferred embodiment, as shown in Figure 5 The first mounting surface 21 is provided with a receiving groove 28, the liquid cooling channel 25 is arranged in the receiving groove 28, a sealing cover plate 29 is fixedly arranged on the receiving groove 28 by screws, and a sealing ring is arranged between the sealing cover plate 29 and the receiving groove 28 and located at the outer periphery of the liquid cooling channel 25.

[0041] In the embodiment, the liquid cooling channel 25 is directly machined in the receiving groove 28 of the liquid cooling plate 2, which is convenient to process; the liquid cooling channel 25 is covered and sealed by the sealing cover plate 29 and the sealing ring, which has good sealing effect.

[0042] 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.

[0043] In the description of the present specification, the terms "one embodiment", "some embodiments" and the like mean 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 mean 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.

[0044] 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 changes 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 high-efficiency double-sided liquid-cooled frequency converter, characterized in that, The application relates to a liquid-cooled power supply device, which comprises a shell (1); a liquid-cooled plate (2) is fixedly arranged in the shell (1); the liquid-cooled plate (2) has opposite first and second mounting surfaces (21) and (22); one end of the bottom of the liquid-cooled plate (2) is provided with an inlet (23), and the other end is provided with an outlet (24); a liquid-cooled channel (25) is arranged in the liquid-cooled plate (2) and is communicated with the inlet (23) and the outlet (24) respectively; A silicon carbide module (3) is fixedly arranged on the first mounting surface (21); a PCBA plate (4) is arranged on the side of the silicon carbide module (3) away from the liquid-cooled plate (2); and the PCBA plate (4) is fixedly connected with the liquid-cooled plate (2) through screws; A film capacitor (5) is fixedly arranged above the inlet (23) and the outlet (24) on the second mounting surface (22); a rectifier bridge (6) and a contactor (7) are fixedly arranged above the film capacitor (5) on the second mounting surface (22); and a pre-charging resistor (8) is fixedly arranged on one side of the film capacitor (5); the rectifier bridge (6) is located above the inlet (23), and the contactor (7) is located above the outlet (24); The liquid-cooled channel (25) comprises a plurality of vertically distributed vertical channels (251); the top ends or the bottom ends of adjacent vertical channels (251) are communicated through horizontal channels (252), so that the liquid-cooled channel (25) is in an S shape; the part of the first mounting surface (21) corresponding to the silicon carbide module (3) is a silicon carbide heat dissipation area, and the liquid-cooled channel (25) continuously and repeatedly passes through the silicon carbide heat dissipation area; the part of the second mounting surface (22) corresponding to the film capacitor (5) is a film capacitor heat dissipation area, and the liquid-cooled channel (25) continuously and repeatedly passes through the film capacitor heat dissipation area; the part of the second mounting surface (22) corresponding to the rectifier bridge (6) is a rectifier bridge heat dissipation area; and the part of the second mounting surface (22) corresponding to the contactor (7) is a contactor heat dissipation area.

2. The high-efficient double-sided liquid-cooled frequency converter according to claim 1, characterized in that, The shell (1) comprises a frame (11), a front cover plate (12) arranged on the front side of the frame (11) and a rear cover plate (13) arranged on the rear side of the frame (11); the front cover plate (12) and the rear cover plate (13) are fixedly connected with the frame (11) through screws respectively; sealing strips are arranged between the front cover plate (12) and the frame (11) and between the rear cover plate (13) and the frame (11) respectively; and a mounting plate (14) is fixedly connected to the rear side of the top of the frame (11), and a mounting hole (15) is arranged in the mounting plate (14).

3. The high-efficient double-sided liquid-cooled frequency converter according to claim 1, characterized in that, An input interface (16), an output interface (17) and a communication interface (18) are fixedly arranged on one side of the shell (1); and the input interface (16), the output interface (17) and the communication interface (18) are electrically connected with the PCBA plate (4) respectively.

4. The high-efficient double-sided liquid-cooled frequency converter according to claim 1, characterized in that, The liquid inlet (23) is fixedly connected with a liquid inlet connector (26) extending from the bottom of the shell (1); the liquid outlet (24) is fixedly connected with a liquid outlet connector (27) extending from the bottom of the shell (1).

5. The high-efficient double-sided liquid-cooled frequency converter according to claim 1, characterized in that, The silicon carbide module (3), the film capacitor (5) and the rectifier bridge (6) are respectively electrically connected with the PCBA board (4); the contactor (7) is respectively electrically connected with the film capacitor (5), the rectifier bridge (6) and the pre-charge resistor (8).

6. The high-efficient double-sided liquid-cooled frequency converter according to claim 1, characterized in that, A receiving groove (28) is formed in the first mounting surface (21), the liquid cooling channel (25) is arranged in the receiving groove (28), a sealing cover plate (29) is fixedly arranged on the receiving groove (28) through screws, and a sealing ring is arranged around the outer periphery of the liquid cooling channel (25) between the sealing cover plate (29) and the receiving groove (28).

Images