Variable frequency power supply facilitating heat dissipation

Abstract

The utility model discloses a variable frequency power supply convenient to radiate heat. The variable frequency power supply includes variable frequency cabinet and switch cabinet, and the bottom of variable frequency cabinet is equipped with lower baffle, middle baffle and upper baffle from bottom to top in proper order, and the middle baffle and upper baffle cooperate in variable frequency cabinet and form upper space by interval, and the middle baffle and lower baffle cooperate in variable frequency cabinet and form lower space by interval, and a plurality of semiconductor refrigeration pieces are embedded on the middle baffle, and both ends of semiconductor refrigeration piece are arranged in upper space and lower space respectively, and the upper baffle is equipped with first air inlet and first air outlet, and it is equipped with first radiating fan, and the variable frequency cabinet on the outside of lower space is equipped with second air inlet and second air outlet, and the second radiating fan is arranged between second air inlet and second air outlet. The utility model discloses utilize the cold energy of semiconductor refrigeration piece to improve the radiating effect of variable frequency power supply, can collect the condensed water produced, and through the discharge pipe, the condensed water is discharged to the outside of variable frequency cabinet, avoids the condensed water gathering in upper space.

Description

Technical Field

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

[0002] A variable frequency power supply (VFD) is a power electronic device that converts AC power of fixed frequency and voltage into AC power of adjustable frequency and voltage. Its core advantages lie in precise control of motor speed, significant energy savings, and stable power supply performance. The core architecture of a VFD includes rectification, filtering, inversion, control, and cooling systems, with the inverter module being the core of the power conversion. It is widely used in industrial production, communication base stations, new energy power generation, rail transportation, and precision electronics manufacturing. VFDs generate considerable heat during operation, typically through active cooling fans. However, this cooling method is ineffective in high ambient temperatures. Therefore, improvements are necessary. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a frequency converter power supply that facilitates heat dissipation.

[0004] To achieve the above objectives, this utility model provides a frequency converter power supply with convenient heat dissipation, including a frequency converter cabinet and a switch cabinet disposed on one side of the frequency converter cabinet. The frequency converter cabinet contains a frequency converter, and the switch cabinet contains several air switches. The bottom of the frequency converter cabinet has a lower partition, a middle partition, and an upper partition arranged sequentially from bottom to top. The middle partition and the upper partition cooperate to form an upper space in the frequency converter cabinet, and the middle partition and the lower partition cooperate to form a lower space in the frequency converter cabinet. Multiple semiconductor cooling chips are embedded in the middle partition, and the two ends of the semiconductor cooling chips are respectively disposed in the upper space and the lower space. The upper partition has a first air inlet and a first air outlet, and a first cooling fan is installed thereon. The frequency converter cabinet outside the lower space has a second air inlet and a second air outlet, and a second cooling fan is disposed between the second air inlet and the second air outlet.

[0005] Furthermore, the partition plate is V-shaped, and a discharge pipe is connected to its middle section. The outer end of the discharge pipe extends outward through the frequency converter cabinet.

[0006] Furthermore, a baffle is provided between the frequency converter cabinet and the switch cabinet. The upper end of the baffle is spaced apart from the top of the frequency converter cabinet and the switch cabinet to form a ventilation opening. The first air inlet is located at the end of the upper partition near the baffle, and an air duct is fixed on its upper side. The end of the air duct away from the first air inlet passes through the baffle and extends into the switch cabinet. The first air outlet is located at the end of the upper partition away from the baffle.

[0007] Furthermore, the air duct has a transverse bend structure.

[0008] Furthermore, filters are provided on the outer side of the second air inlet and at the end of the air duct away from the first air inlet.

[0009] Furthermore, heat dissipation fins are fixed at both ends of the semiconductor cooling chip.

[0010] Furthermore, the second air inlet is located on the front side of the frequency converter cabinet, and there are two second cooling fans, which are spaced apart on the rear side of the frequency converter cabinet.

[0011] Beneficial effects: This utility model separates the upper and lower spaces by setting an upper partition, a middle partition and a lower partition at the bottom of the frequency converter cabinet, and installs a semiconductor cooling chip on the middle partition to improve the heat dissipation of the frequency converter power supply by generating cooling energy using the semiconductor cooling chip; the middle partition is set in a V shape to facilitate the collection of condensate and discharge it to the outside of the frequency converter cabinet through a drain pipe, thus preventing condensate from accumulating in the upper space. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a frequency converter power supply with easy heat dissipation according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a frequency converter power supply with easy heat dissipation according to an embodiment of the present invention. Detailed Implementation

[0013] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0014] like Figure 1 and Figure 2As shown, this embodiment of the utility model provides a frequency converter power supply with convenient heat dissipation, including a frequency converter cabinet 1 and a switch cabinet 2 disposed on one side of the frequency converter cabinet 1. A frequency converter 3 is disposed inside the frequency converter cabinet 1, and several air switches 4 are disposed inside the switch cabinet 2. The air switches 4 preferably include AC switches and DC switches. The AC power line enters from a wire hole at the bottom of the switch cabinet 2, then connects to the AC switch, and then connects from the AC switch to the AC power input terminal of the frequency converter 3. The frequency converter 3 converts the AC power to DC power. The DC power output terminal of the frequency converter 3 is connected to the DC switch via a DC power line, and then exits to the outside through a wire hole on the lower side of the switch cabinet 2. At the bottom of the frequency converter cabinet 1, a lower partition 5, a middle partition 6, and an upper partition 7 are arranged sequentially from bottom to top. The four sides of the lower partition 5, middle partition 6, and upper partition 7 are all connected to the interior of the frequency converter cabinet 1, thereby allowing the middle partition 6 and the upper partition 5 to cooperate and form an upper space, and the middle partition 6 and the lower partition 7 to cooperate and form a lower space. Multiple thermoelectric coolers 8 are embedded in the partition 6, with their two ends positioned in the upper and lower spaces, respectively. The upper partition 7 has a first air inlet and a first air outlet, and a first cooling fan 9 is installed on the upper partition 7. A second air inlet 10 and a second air outlet are located on the inverter cabinet 1 outside the lower space; the second air inlet 10 is preferably grille-shaped. A second cooling fan 11 is located between the second air inlet 10 and the second air outlet. When the temperature inside the inverter cabinet 1 or switch cabinet 2 exceeds a set temperature threshold, the thermoelectric coolers 8 are activated. The end of the thermoelectric cooler 8 in the upper space cools, while the end in the lower space heats. When the first cooling fan 9 is operating, air is drawn into the upper space through the first air inlet, cooled by the end of the thermoelectric cooler 8 in the upper space, and then sent into the inverter cabinet 1, thereby improving the heat dissipation of devices such as the inverter 3 and the air switch 4. When the second cooling fan 11 is working, it can draw air from the outside of the frequency converter cabinet 1 through the second air inlet 10. The air enters the lower space and flows through one end of the semiconductor cooling chip 8 located in the lower space, thereby dissipating the heat generated by the one end of the semiconductor cooling chip 8 located in the lower space.

[0015] Since the end of the thermoelectric cooler 8 located in the upper space will generate some condensate when cooling the air, to prevent the condensate from accumulating on the partition 6, the partition 6 is preferably designed in a V-shape, with a drain pipe 12 connected to its middle section. The outer end of the drain pipe 12 extends outward through the inverter cabinet 1. The condensate generated by the thermoelectric cooler 8 will accumulate in the middle of the partition 6 and then be discharged to the outside of the inverter cabinet 1 through the drain pipe 12. A flexible hose can be connected to the outside of the drain pipe 12 to discharge the condensate to a designated location.

[0016] The frequency converter cabinet 1 and the switch cabinet 2 can be connected. To improve the air circulation between the frequency converter cabinet 1 and the switch cabinet 2, a baffle 13 is preferably installed between the frequency converter cabinet 1 and the switch cabinet 2. The upper end of the baffle 13 is spaced apart from the top of the frequency converter cabinet 1 and the switch cabinet 2 to form a ventilation opening 14. The power cable between the air switch 4 and the frequency converter 3 can also pass through the ventilation opening 14. The first air inlet is located at the end of the upper partition 7 near the baffle 13. An air duct 15 is fixed above the first air inlet. The end of the air duct 15 away from the first air inlet passes through the baffle 13 and extends into the switch cabinet 2. The first air outlet is located at the end of the upper partition 7 away from the baffle 14. The air duct 15 is preferably configured with a horizontal fold structure.

[0017] To avoid dust contamination, filters are preferably installed on the outer side of the second air inlet 10 and at the end of the air duct 15 furthest from the first air inlet. These filters can be made of non-woven fabric. To improve heat exchange efficiency, heat dissipation fins 16 are preferably fixed at both ends of the thermoelectric cooler 8. Thermal grease can be applied between the heat dissipation fins 16 and the thermoelectric cooler 8 to improve thermal conductivity.

[0018] The aforementioned second air inlet 10 is preferably located on the front side of the frequency converter cabinet 1, and the second cooling fan 11 is preferably two. The two second cooling fans 11 are spaced apart on the rear side of the frequency converter cabinet 1. Using two second cooling fans 11 can meet the heat dissipation requirements of the semiconductor cooling chip 8 when the outside air temperature is high.

[0019] The above description is merely a preferred embodiment of this utility model. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A frequency converter power supply with easy heat dissipation, comprising a frequency converter cabinet and a switch cabinet disposed on one side of the frequency converter cabinet, wherein the frequency converter cabinet contains a frequency converter and the switch cabinet contains a plurality of air switches, characterized in that, The bottom of the frequency converter cabinet is provided with a lower partition, a middle partition, and an upper partition arranged sequentially from bottom to top. The middle partition and the upper partition cooperate to form an upper space within the frequency converter cabinet, and the middle partition and the lower partition cooperate to form a lower space within the frequency converter cabinet. Multiple semiconductor cooling chips are embedded in the middle partition, with their two ends respectively located in the upper and lower spaces. The upper partition is provided with a first air inlet and a first air outlet, and a first cooling fan is installed thereon. The frequency converter cabinet outside the lower space is provided with a second air inlet and a second air outlet, and a second cooling fan is provided between the second air inlet and the second air outlet.

2. The frequency converter power supply with easy heat dissipation according to claim 1, characterized in that, The partition is V-shaped, and a discharge pipe is connected to its middle section. The outer end of the discharge pipe extends outward through the frequency converter cabinet.

3. The frequency converter power supply with easy heat dissipation according to claim 1, characterized in that, A baffle is provided between the frequency converter cabinet and the switch cabinet. The upper end of the baffle is spaced apart from the top of the frequency converter cabinet and the switch cabinet to form a ventilation opening. The first air inlet is located at the end of the upper partition near the baffle, and an air duct is fixed on its upper side. The end of the air duct away from the first air inlet passes through the baffle and extends into the switch cabinet. The first air outlet is located at the end of the upper partition away from the baffle.

4. The frequency converter power supply with easy heat dissipation according to claim 3, characterized in that, The air duct has a horizontal bend structure.

5. The frequency converter power supply with easy heat dissipation according to claim 3, characterized in that, A filter screen is provided on the outer side of the second air inlet and at the end of the air duct away from the first air inlet.

6. The frequency converter power supply with easy heat dissipation according to claim 1, characterized in that, Heat dissipation fins are fixed at both ends of the semiconductor cooling chip.

7. The frequency converter power supply with easy heat dissipation according to claim 1, characterized in that, The second air inlet is located on the front side of the frequency converter cabinet, and there are two second cooling fans, which are spaced apart on the rear side of the frequency converter cabinet.

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