Heat dissipation structure of frequency converter

Abstract

The utility model discloses a heat radiation structure of a frequency converter, the heat radiation structure is arranged in the rear end of a housing of the frequency converter, the heat radiation structure comprises side heat radiation holes, upper heat radiation holes, a fan, a first baffle plate assembly and a second baffle plate assembly, one side wall surface of the rear end of the housing is provided with a plurality of side heat radiation holes, and the upper heat radiation holes are arranged on the side wall surface. A plurality of upper heat dissipation holes are formed in the top of the rear end of the shell, at least one mounting hole is formed in the bottom of the rear end of the shell, a fan is arranged in the mounting hole, a shell is arranged above the fan, a first heat dissipation channel is formed in the bottom of the shell, a heat dissipation cavity is formed in the top of the shell, and the first baffle assembly and the second baffle assembly are both arranged in the heat dissipation cavity. A second heat dissipation channel communicated with the side heat dissipation holes and / or the upper heat dissipation holes is formed in the heat dissipation cavity space between the first baffle assembly and the second baffle assembly, the trend of the hot air in the heat dissipation cavity is changed by adjusting the shape of the second heat dissipation channel so as to control the position of the hot air discharged out of the heat dissipation cavity, and therefore the heat dissipation effect can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically to a heat dissipation structure for a frequency converter. Background Technology

[0002] The frequency converters used in some large-scale equipment are generally equipped with a fan-driven cooling structure to achieve active heat dissipation due to their high operating intensity, thereby ensuring the stability of the frequency converter's operation.

[0003] However, existing frequency converters with fan-equipped cooling structures typically maintain a fixed fan speed during operation, ensuring a constant cooling effect. If the frequency converter's workload increases, the heat generated rises while the cooling effect remains constant. This can lead to insufficient heat dissipation, causing the frequency converter to burn out due to excessive heat accumulation. Therefore, it is necessary to consider the cooling effect of the frequency converter's cooling structure in relation to its workload. Utility Model Content

[0004] To address the technical deficiencies in the background technology, this utility model proposes a heat dissipation structure for a frequency converter, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0005] This utility model discloses a heat dissipation structure for a frequency converter. The heat dissipation structure is disposed inside the rear end of the inverter's housing. The heat dissipation structure includes side heat dissipation holes, upper heat dissipation holes, a fan, a first baffle assembly, and a second baffle assembly. One side wall of the rear end of the housing is provided with several side heat dissipation holes, the top of the rear end of the housing is provided with several upper heat dissipation holes, and the bottom of the rear end of the housing is provided with at least one mounting hole. A fan is disposed in the mounting hole. A housing is disposed above the fan. The bottom of the housing is provided with two first heat dissipation channels facing the fan. The top of the housing is provided with a heat dissipation cavity communicating with the first heat dissipation channels. The first baffle assembly and the second baffle assembly are both disposed in the heat dissipation cavity. The first baffle assembly and the second baffle assembly are disposed in pairs in the heat dissipation cavity. The space between the first baffle assembly and the second baffle assembly forms a second heat dissipation channel communicating with the side heat dissipation holes and / or the upper heat dissipation holes. A drive device is disposed in the housing outside the heat dissipation cavity. The first baffle assembly and the second baffle assembly are both connected to the drive device.

[0006] As a further embodiment of this utility model, the first baffle assembly is composed of a plurality of first baffles, and the second baffle assembly is composed of a plurality of second baffles. Both ends of the first baffle and both ends of the second baffle are connected to the housing through a rotating shaft passing through the housing. The driving device is connected to the rotating shafts of both the first baffle and the second baffle. Under the drive of the driving device, the first baffle and the second baffle rotate in the heat dissipation cavity with their rotating shafts at their ends as the rotation center, and divide the space in the heat dissipation cavity to form a plurality of second heat dissipation channels.

[0007] As a further embodiment of the present invention, after the first baffle and the second baffle are rotated, the bottom end of the first baffle abuts against the top end of the second baffle, and a second heat dissipation channel with a plurality of end-connecting side heat dissipation holes is formed in the heat dissipation cavity.

[0008] As a further embodiment of the present invention, after the first baffle and the second baffle are rotated, the ends of the two first baffles that are adjacent in the height direction of the heat dissipation cavity abut against each other, and the ends of the two second baffles that are adjacent in the height direction of the heat dissipation cavity abut against each other, thereby forming a plurality of second heat dissipation channels with their ends connected to the heat dissipation holes in the heat dissipation cavity.

[0009] As a further embodiment of the present invention, after the first baffle and the second baffle are rotated, the ends of all the first baffles do not abut against each other and do not abut against the ends of the second baffles, and the ends of all the second baffles do not abut against each other and do not abut against the ends of the first baffles. The ends of the second heat dissipation channels formed in the heat dissipation cavity are respectively connected to the side heat dissipation holes and the upper heat dissipation holes.

[0010] As a further embodiment of this utility model, the driving device includes a first transmission wheel, a first transmission belt, a second transmission wheel, a second transmission belt, a linear stepper motor, and a third transmission belt. The first transmission wheel is located on the outer side of the rear end of the heat dissipation cavity, on the outer side of the housing. A first driven wheel is located on the outer side of the middle portion of the housing of the first baffle assembly via a rotating shaft. The first transmission belt is sleeved around the first transmission wheel and the first driven wheel connected to the rotating shaft of the first baffle. A second driven wheel is located on the housing above the second baffle assembly via a rotating shaft. The housing on the outer side of the top of the second baffle assembly is provided with a third driven wheel via a rotating shaft. The second transmission belt is sleeved on the outside of the first transmission wheel, the second driven wheel, and the third driven wheel connected to the rotating shaft of the second baffle. The rotating shafts at the other ends of both the first baffle and the second baffle are provided with second transmission wheels. The second transmission wheels are located on the outer side of the housing at the front end of the heat dissipation cavity. The linear stepper motor is located on the outer wall of the housing near the side of the second transmission wheel. The second transmission wheel is sleeved with the third transmission belt. The output end of the linear stepper motor is connected to a connecting block. The other end of the connecting block is connected to the middle section of the third transmission belt.

[0011] As a further embodiment of this utility model, the first heat dissipation channel is a semi-enclosed pipe structure, and the opening side of the first heat dissipation channel is located behind the frequency converter.

[0012] As a further embodiment of this utility model, the side wall in the housing where the non-side heat dissipation holes are located is a closed surface.

[0013] The beneficial effects of this utility model are as follows: the heat generated by the inverter during operation is blown into the heat dissipation structure by the fan, and the air in the first heat dissipation channel is carried into the second heat dissipation channel. Under the drive of the drive device, the first baffle assembly and the second baffle assembly can adjust the shape of the second heat dissipation channel in the heat dissipation cavity, change the direction of the hot air in the heat dissipation cavity, and control the position of the hot air discharged from the heat dissipation cavity and the time of hot air being discharged from the inverter by utilizing the working state of the fan and the shape changes of the second heat dissipation channel, thereby achieving the purpose of adjusting the heat dissipation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of the heat dissipation structure.

[0015] Figure 2 This is a schematic diagram of a frequency converter with this heat dissipation structure.

[0016] Figure 3 This is a schematic diagram of the internal structure of the heat dissipation cavity.

[0017] Figure 4 This is a schematic diagram of the first type of second heat dissipation channel.

[0018] Figure 5 This is a schematic diagram of the second type of second heat dissipation channel.

[0019] Figure 6 This is a schematic diagram of the third type of second heat dissipation channel.

[0020] Figure 7 This is a schematic diagram of the structure of the drive unit at the rear end of the housing.

[0021] In the diagram, 1. Inverter; 2. Housing; 21. Mounting hole; 22. Side heat dissipation hole; 23. Top heat dissipation hole; 3. Fan; 4. Housing; 41. First heat dissipation channel; 42. Heat dissipation cavity; 421. Second heat dissipation channel; 43. Enclosed surface; 5. First baffle assembly; 51. First baffle; 6. Second baffle assembly; 61. Second baffle; 7. Drive unit; 71. First transmission wheel; 72. First transmission belt; 73. Second transmission wheel; 74. Second transmission belt; 75. Linear stepper motor; 76. Third transmission belt; 77. First driven wheel; 78. Second driven wheel; 79. Third driven wheel; 710. Connecting block. Detailed Implementation

[0022] This utility model discloses a heat dissipation structure for a frequency converter, such as Figures 1-3 As shown, the heat dissipation structure is located inside the rear end of the housing 2 of the frequency converter 1. The heat dissipation structure includes side heat dissipation holes 22, upper heat dissipation holes 23, a fan 3, a first baffle assembly 5, and a second baffle assembly 6. One side wall of the rear end of the housing 2 has several side heat dissipation holes 22, the top of the rear end of the housing 2 has several upper heat dissipation holes 23, and the bottom of the rear end of the housing 2 has at least one mounting hole 21. The fan 3 is installed inside the mounting hole 21. A housing 4 is located above the fan 3, and the bottom of the housing 4 has two first heat dissipation channels 41 directly facing the fan 3. The top of the housing 4 is provided with a heat dissipation cavity 42 that communicates with the first heat dissipation channel 41. The first baffle assembly 5 and the second baffle assembly 6 are both disposed in the heat dissipation cavity 42. The first baffle assembly 5 and the second baffle assembly 6 are disposed in the heat dissipation cavity 42 in pairs. The space of the heat dissipation cavity 42 between the first baffle assembly 5 and the second baffle assembly 6 forms a second heat dissipation channel 421 that communicates with the side heat dissipation hole 22 and / or the upper heat dissipation hole 23. The outer shell 2 outside the heat dissipation cavity 42 is provided with a driving device 7. The first baffle assembly 5 and the second baffle assembly 6 are both connected to the driving device 7.

[0023] It should be noted that: Fan 3 draws air from below the inverter 1 into the inverter 1's housing 2, carrying away the heat generated during inverter 1's operation. The hot air formed by the drawn-in air and the heat enters the first heat dissipation channel 41. As fan 3 continues to operate, hot air continuously flows from the first heat dissipation channel 41 into the second heat dissipation channel 421. At this time, the operator can control the drive device 7 through a controller connected to the drive device 7. The drive device 7 drives the first baffle assembly 5 and the second baffle assembly 6, and adjusts its own structure under the drive device 7's influence, thereby changing the shape of the second heat dissipation channel 421 within the heat dissipation cavity 42. The operating state of the fan 3 and the shape of the second heat dissipation channel 421 can be adjusted to change the direction of hot air in the heat dissipation cavity 42. The position of hot air exiting the heat dissipation cavity 42 can be adjusted to three ways: exiting from the side heat dissipation hole 22, exiting from the upper heat dissipation hole 23, or exiting from both the side heat dissipation hole 22 and the upper heat dissipation hole 23 simultaneously. The operating state of the drive device 7 can also be set to be synchronized with the operating state of the fan 3, so that the operating state of the drive device 7 is coordinated according to the speed of the fan 3, thereby realizing the time control of hot air exiting the inverter 1. By controlling the position of hot air exiting the heat dissipation cavity 42 and the time of hot air exiting the inverter 1, the purpose of adjusting the heat dissipation effect can be achieved.

[0024] It needs to be further explained that, such as Figure 2 and Figure 3 As shown, the first baffle assembly 5 is composed of several first baffles 51, and the second baffle assembly 6 is composed of several second baffles 61. Both ends of the first baffle 51 and both ends of the second baffle 61 are connected to the housing 4 through a rotating shaft passing through the housing 4. The driving device 7 connects the rotating shafts of the first baffle 51 and the second baffle 61. Under the drive of the driving device 7, the first baffle 51 and the second baffle 61 rotate within the heat dissipation cavity 42 with their rotating shafts at their ends as the rotation center, and divide the space within the heat dissipation cavity 42 to form several second heat dissipation channels 421.

[0025] The walls on both sides of the second heat dissipation channel 421 are formed by several first baffles 51 and second baffles 61, thereby forming several second heat dissipation channels 421 for guiding hot air in the heat dissipation cavity 42. By rotating the first baffles 51 and second baffles 61, the shape of the second heat dissipation channel 421 can be adjusted, thereby changing the direction of hot air in the heat dissipation cavity 42. Combined with the overall speed of the fan 3, the heat dissipation effect of the inverter 1 can be adjusted.

[0026] Specifically, such as Figure 4As shown, after the first baffle 51 and the second baffle 61 are rotated, the bottom end of the first baffle 51 abuts against the top end of the second baffle 61, and a plurality of second heat dissipation channels 421 with end-connecting side heat dissipation holes 22 are formed in the heat dissipation cavity 42.

[0027] When it is necessary to use the fan 3 to quickly dissipate the heat energy accumulated inside the inverter 1, the first baffle 51 and the second baffle 61 can form the wall of the second heat dissipation channel 421 in the heat dissipation cavity 42. After the first baffle 51 and the second baffle 61 are combined, the second heat dissipation channel 421 is formed with the side heat dissipation hole 22 and the first heat dissipation channel 41 respectively at both ends. Since the distance from one side of the second heat dissipation channel 421 to the side wall of the outer casing 2 is short, the heat energy accumulated inside the inverter 1 can be quickly discharged from the side heat dissipation hole 22 to the outside of the inverter 1.

[0028] As a further embodiment of this utility model, such as Figure 5 As shown, after the first baffle 51 and the second baffle 61 are rotated, the ends of the two first baffles 51, which are located adjacent to each other in the height direction of the heat dissipation cavity 42, abut against each other, and the ends of the two second baffles 61, which are located adjacent to each other in the height direction of the heat dissipation cavity 42, a plurality of second heat dissipation channels 421 with their ends connected to the heat dissipation holes 23 are formed in the heat dissipation cavity 42.

[0029] When the fan 3 is used to normally dissipate the heat accumulated inside the inverter 1, the abutment of the ends of two adjacent first baffles 51 in the height direction of the heat dissipation cavity 42 forms a part of the wall of the second heat dissipation channel 421. Then, the abutment of the ends of several first baffles 51 forms one side wall of the second heat dissipation channel 421. Similarly, the abutment of the ends of two adjacent second baffles 61 in the height direction of the heat dissipation cavity 42 forms a part of the wall of the second heat dissipation channel 421. Then, the abutment of the ends of several second baffles 61 forms the other side wall of the second heat dissipation channel 421. After the first baffles 51 and the second baffles 61 are combined, a second heat dissipation channel 421 is formed with its two ends connected to the upper heat dissipation hole 23 and the first heat dissipation channel 41, respectively. Since hot air tends to rise, with the upward blowing effect of the fan 3, the heat dissipation problem of the inverter 1, which is using the fan 3 at normal power for heat dissipation, can not only be solved well, but also achieve energy saving.

[0030] As a further embodiment of this utility model, such as Figure 6As shown, after the first baffle 51 and the second baffle 61 are rotated, the ends of all the first baffle 51 do not abut against each other and do not abut against the ends of the second baffle 61, and the ends of all the second baffle 61 do not abut against each other and do not abut against the ends of the first baffle 51. The ends of the second heat dissipation channel 421 formed in the heat dissipation cavity 42 are respectively connected to the side heat dissipation hole 22 and the upper heat dissipation hole 23.

[0031] When the fan 3 is off, the second heat dissipation channel 421 can be connected to the outside through the side heat dissipation hole 22 and the upper heat dissipation hole 23. The air inside the heat dissipation cavity 42 can be discharged to the outside of the inverter 1 through the second heat dissipation channel 421 to the side heat dissipation hole 22 or the upper heat dissipation hole 23. Compared with the other two types of second heat dissipation channel 421 structures, this second heat dissipation channel 421 structure has the largest area for air exchange with the outside of the inverter 1, and the heat dissipation effect inside the inverter 1 will be better when the fan 3 is not working.

[0032] As a further embodiment of this utility model, such as Figure 2 and Figure 7 As shown, the driving device 7 includes a first transmission wheel 71, a first transmission belt 72, a second transmission wheel 73, a second transmission belt 74, a linear stepper motor 75, and a third transmission belt 76. The first transmission wheel 71 is located at the outer rear end of the heat dissipation cavity 42, on the outer side of the housing 4. A first driven wheel 77 is located on the outer side of the middle portion of the housing 4 of the first baffle assembly 5 via a rotating shaft. The first transmission belt 72 is sleeved around the first transmission wheel 71 and the first driven wheel 77 connected to the rotating shaft of the first baffle 51. A second driven wheel 78 is located on the housing 4 above the second baffle assembly 6 via a rotating shaft. The outer shell 4 at the top is provided with a third driven wheel 79 via a rotating shaft. The second transmission belt 74 is sleeved on the outside of the first transmission wheel 71, the second driven wheel 78, and the third driven wheel 79 connected to the rotating shaft of the second baffle 61. The rotating shafts at the other ends of the first baffle 51 and the second baffle 61 are provided with second transmission wheels 73. The second transmission wheels 73 are located on the outer shell 4 at the front end of the heat dissipation cavity 42. The linear stepper motor 75 is located on the outer wall of the shell 4 near the side of the second transmission wheel 73. The second transmission wheel 73 is sleeved with a third transmission belt 76. The output end of the linear stepper motor 75 is connected to a connecting block 710. The other end of the connecting block 710 is connected to the middle section of the third transmission belt 76.

[0033] A linear stepper motor 75 is connected to one side of a third transmission belt 76 for driving. The connection between the third transmission belt 76 and the second transmission wheel 73 drives one of the first baffles 51 and one of the second baffles 61 to rotate. When one of the first baffles 51 and the second baffle 61 rotates, the first baffle 51 transmits kinetic energy to the remaining first baffles 51 through the transmission structure formed by the first transmission belt 72, the first transmission wheel 71, and the first driven wheel 77, thereby causing the remaining first baffles 51 to rotate. The second baffle 61 transmits kinetic energy to the remaining second baffles 61 through the transmission structure formed by the second transmission belt 74, the first transmission wheel 71, the second driven wheel 78, and the third driven wheel 79, thereby causing the remaining second baffles 61 to rotate. All the first baffles 51 and the second baffles 61 rotate under the drive of the linear stepper motor 75, thereby changing the structure of the second heat dissipation channel 421, and thus changing the heat dissipation effect of the heat dissipation structure set in the frequency converter 1.

[0034] As a further embodiment of this utility model, such as Figure 2 As shown, the first heat dissipation channel 41 is a semi-enclosed pipe structure, and the opening side of the first heat dissipation channel 41 is located behind the inverter 1.

[0035] The opening of the first heat dissipation channel 41 is directly opposite the rear end of the main body of the inverter 1. The heat energy emitted from the rear end of the main body of the inverter 1 can more easily enter the first heat dissipation channel 41 and be carried into the second heat dissipation channel 421 above the first heat dissipation channel 41 along with the air blown into the first heat dissipation channel 41 by the fan 3.

[0036] As a further embodiment of this utility model, such as Figure 3 As shown, the side wall where the non-side heat dissipation hole 22 is located in the housing 4 is a closed surface 43.

[0037] The enclosure 43 allows the heat dissipation structure to avoid other walls of the housing 4 from affecting the exhaust of hot air in the heat dissipation cavity 42 when using the side heat dissipation hole 22 or the upper heat dissipation hole 23 for different heat dissipation effects. This facilitates the guidance and exhaust of hot air in the heat dissipation cavity 42, thereby making the heat dissipation speed of the frequency converter 1 controllable.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat dissipation structure of a frequency converter, the heat dissipation structure being provided in a rear end of a housing of the frequency converter, characterized in that, The heat dissipation structure comprises side heat dissipation holes, upper heat dissipation holes, a fan, a first baffle assembly and a second baffle assembly, one side wall surface of the rear end of the shell is provided with a plurality of side heat dissipation holes, the top of the rear end of the shell is provided with a plurality of upper heat dissipation holes, the bottom of the rear end of the shell is provided with at least one mounting hole, the mounting hole is provided with a fan, the upper side of the fan is provided with a shell, the bottom of the shell is provided with two first heat dissipation channels opposite to the fan, the top of the shell is provided with a heat dissipation cavity in communication with the first heat dissipation channels, the first baffle assembly and the second baffle assembly are arranged in the heat dissipation cavity, the first baffle assembly and the second baffle assembly are arranged in the form of pairs in the heat dissipation cavity, the space of the heat dissipation cavity between the first baffle assembly and the second baffle assembly forms a second heat dissipation channel in communication with the side heat dissipation holes and / or the upper heat dissipation holes, a driving device is arranged in the shell outside the heat dissipation cavity, and the first baffle assembly and the second baffle assembly are connected with the driving device.

2. The heat dissipating structure according to claim 1, wherein The first baffle assembly is composed of a plurality of first baffles, the second baffle assembly is composed of a plurality of second baffles, the two ends of the first baffles and the two ends of the second baffles are connected to the shell through rotating shafts penetrating the shell, the driving device is connected with the rotating shafts of the first baffles and the second baffles, and the first baffles and the second baffles rotate in the heat dissipation cavity with the rotating shafts at the ends as the rotation centers under the driving of the driving device, and the space in the heat dissipation cavity is separated to form a plurality of second heat dissipation channels.

3. The heat dissipating structure according to claim 2, wherein After the first baffles and the second baffles rotate, the bottom end of the first baffle abuts against the top end of the second baffle, and a plurality of second heat dissipation channels in communication with the side heat dissipation holes at the ends are formed in the heat dissipation cavity.

4. The heat dissipating structure according to claim 2, wherein After the first baffles and the second baffles rotate, the ends of the first baffles in the adjacent positions in the height direction of the heat dissipation cavity abut against each other, and the ends of the second baffles in the adjacent positions in the height direction of the heat dissipation cavity abut against each other, so that a plurality of second heat dissipation channels in communication with the upper heat dissipation holes at the ends are formed in the heat dissipation cavity.

5. The heat dissipating structure according to claim 2, wherein After the first baffles and the second baffles rotate, the ends of all the first baffles do not abut against each other and do not abut against the ends of the second baffles, and the ends of all the second baffles do not abut against each other and do not abut against the ends of the first baffles, and the ends of the second heat dissipation channels formed in the heat dissipation cavity are in communication with the side heat dissipation holes and the upper heat dissipation holes, respectively.

6. The heat dissipating structure according to claim 2, wherein The driving device comprises a first transmission wheel, a first transmission belt, a second transmission wheel, a second transmission belt, a linear stepping motor and a third transmission belt, one end of the rotating shaft of the first baffle and the second baffle is provided with the first transmission wheel, the first transmission wheel is located at the shell outside the rear end of the heat dissipation cavity, the shell outside the middle of the first baffle assembly is provided with a first driven wheel through the rotating shaft, the first transmission belt is sleeved outside the first transmission wheel and the first driven wheel connected by the rotating shaft of the first baffle, the shell above the second baffle assembly is provided with a second driven wheel through the rotating shaft, the shell outside the top of the second baffle assembly is provided with a third driven wheel through the rotating shaft, the second transmission belt is sleeved outside the first transmission wheel, the second driven wheel and the third driven wheel connected by the rotating shaft of the second baffle, the rotating shaft of the other end of the first baffle and the second baffle is provided with the second transmission wheel, the second transmission wheel is located at the shell outside the front end of the heat dissipation cavity, the linear stepping motor is arranged at the outer wall of the shell close to the side of the second transmission wheel, the second transmission wheel is sleeved with the third transmission belt, the output end of the linear stepping motor is connected with a connecting block, the other end of the connecting block is connected with the middle segment of the third transmission belt.

7. The heat dissipating structure according to claim 1, wherein The first heat dissipation channel is a half-enclosed pipeline structure, and the opening side of the first heat dissipation channel is located at the rear of the frequency converter.

8. The heat dissipating structure according to claim 1, wherein The side wall of the shell where the non-side heat dissipation hole is located is a closed surface.

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