Overhead inverter cooling structure for open-shelf frequency converter
By optimizing the air duct design, the problem of poor cooling effect of high-power open-frame inverters was solved, and efficient cooling of the inverters was achieved.
Patent Information
- Application Number
- CN202520269164.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing technologies struggle to effectively cool the inverters of high-power open-frame frequency converters, especially when multiple IGBTs are involved.
A cooling structure for a top-mounted inverter used in an open-frame frequency converter was designed, including an air guide shroud, a lower inverter cover, an inverter bracket, and an air guide plate. By optimizing the air duct design, the cooling air is ensured to flow circumferentially within the lower inverter cover, increasing the contact area with the IGBT and preventing cooling air loss.
It achieves effective cooling of the inverter in high-power open-frame frequency converters, improving cooling effect and efficiency.
Smart Images
Figure CN223745157U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to open rack variable frequency machine cooling technical field, specifically related to a kind of top-mounted inverter cooling structure for open rack variable frequency machine. BACKGROUND
[0002] For the inverter top-mounted open rack variable frequency machine, to realize the cooling of inverter, the current is through opening on the air deflector, then cooling air is blown from the air deflector to the inverter to realize cooling, the cooling method can realize the cooling of inverter for small power open rack variable frequency machine, that is, only one IGBT (Insulated Gate Bipolar Transistor) on the inverter, for the high-power open rack variable frequency machine, that is, two or even four IGBT inverters, the above-mentioned method cannot realize the cooling of inverter. SUMMARY
[0003] The utility model proposes a kind of top-mounted inverter cooling structure for open rack variable frequency machine, can realize the cooling of high-power open rack variable frequency machine on top-mounted inverter.
[0004] Therefore, the technical scheme adopted by the utility model is as follows: a kind of top-mounted inverter cooling structure for open rack variable frequency machine, including the first air outlet being arranged on the air deflector and the inverter lower cover for accommodating inverter, the first air inlet for the cooling air flowing out from the first air outlet to enter is provided on the inverter lower cover, the inverter support for mounting inverter on the rack of open rack variable frequency machine is provided on the inverter lower cover, the second air inlet for the cooling air flowing out from the first air outlet to pass through is provided on the inverter support, the air deflector for ensuring that cooling air can accurately pass through the second air inlet and then enter the first air inlet is provided at the first air outlet, the second air outlet is provided on the side of the inverter lower cover opposite to the air inlet direction of first air inlet, the side wall of the inverter lower cover in the air inlet direction of first air inlet is provided as outwardly protruding arc.
[0005] As preferred in the above scheme, the first air inlet is provided with air deflector lug corresponding to air deflector and facilitating the passage of cooling air.
[0006] Further preferably, the side of the inverter lower cover is provided with a third air outlet.
[0007] Further preferably, a guide arc convex strip for guiding cooling air to the second air outlet is provided on the inner bottom surface of the inverter lower cover.
[0008] Further preferably, a wind-blocking convex strip is provided on the bottom surface of the inverter lower cover to prevent cooling air from flowing out along the first air inlet.
[0009] Further preferably, the lower cover of the inverter is provided with a plurality of sets of mounting holes suitable for different inverter installations, and the lower cover of the inverter is provided with anti-contact protrusions for preventing the inverter from contacting the inner wall of the lower cover of the inverter.
[0010] Further preferably, the upper end between the lower cover of the inverter and the inverter is provided with a sealing cotton for preventing the cooling air from running out.
[0011] The utility model discloses the beneficial effect: cooling air flows out from the first air outlet, under the action of the air deflector, enters the first air inlet, then from the second air inlet into the lower cover of inverter, under the action of the arc side wall of the lower cover of inverter, circular flow in the lower cover of inverter, finally along the second air outlet, thereby realizing the cooling of inverter, the existence of the air deflector can effectively prevent the cooling air from flowing out along the gap between the air deflector and the inverter support, thereby effectively ensuring the cooling air amount into the lower cover of inverter, the existence of the arc side wall of the lower cover of inverter makes the cooling air circular flow in the lower cover of inverter, makes the contact between the cooling air and the inverter more, thereby ensuring the cooling effect of inverter. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 For the schematic of the utility model Figure 1 .
[0013] Figure 2 For the schematic of the utility model Figure 2 .
[0014] Figure 3 For the schematic of the lower cover of inverter in the utility model Figure 1 .
[0015] Figure 4 For the schematic of the lower cover of inverter in the utility model Figure 2 .
[0016] Figure 5 For the schematic of the utility model installation on the open rack frequency conversion machine.
[0017] Fig. 10, inverter-20, lower cover of inverter-30, first air inlet-31, second air outlet-32, air deflector lug-33, third air outlet-34, guide arc protrusion-35, wind blocking protrusion-36, mounting hole-37, anti-contact protrusion-38, inverter support-40, air deflector-50. DETAILED DESCRIPTION
[0018] The utility model is further described below through examples and in conjunction with the drawings:
[0019] As Figures 1-4As shown, a top-mounted inverter cooling structure for open rack variable frequency machine mainly consists of a wind guide cover 10, an inverter lower cover 30, an inverter support 40 and a wind guide plate 50. The wind guide cover 10 is the original structure of the open rack variable frequency machine, the inverter lower cover 30 is used for accommodating the inverter 20, and the inverter support 40 is arranged on the inverter lower cover 30 for mounting the inverter on the rack of the open rack variable frequency machine.
[0020] A first air outlet is arranged on the wind guide cover 10, a first air inlet 31 for the cooling air flowing out of the first air outlet is arranged on the inverter lower cover 30, a second air inlet for the cooling air flowing out of the first air outlet is arranged on the inverter support 40, a second air outlet 32 is arranged on the side of the inverter lower cover 30 opposite to the air inlet direction of the first air inlet 31, the side wall of the inverter lower cover 30 located in the air inlet direction of the first air inlet 31 is arranged as a circular arc protruding outward, and the wind guide plate 50 is arranged at the first air outlet for ensuring that the cooling air can accurately pass through the second air inlet and then enter the first air inlet 31. Preferably, sealing cotton is arranged at the upper end between the inverter lower cover 30 and the inverter 20 for preventing the cooling air from running out.
[0021] Under the action of the impeller in the wind guide cover, the cooling air enters the wind guide cover, then flows out of the first air outlet, and then enters between the inverter and the inverter lower cover after sequentially passing through the second air inlet and the first air inlet under the action of the wind guide plate. Then, under the influence of the inverter side wall arranged as a circular arc, the cooling air changes direction and flows in a ring direction, and finally flows out of the second air outlet. Generally, the IGBT of the inverter is diagonally arranged, so that when the first air inlet is arranged below one of the IGBTs, the cooling of all the IGBTs can be realized. Since the IGBT is the main heat generating element of the inverter, the cooling effect of the top-mounted inverter is good.
[0022] To further ensure the heat dissipation effect of the inverter, after the inverter is installed, the direction of the inverter bottom rib is arranged along the direction of the cooling air inlet and outlet, that is, the direction of the inverter bottom rib is consistent with the direction of the cooling air entering the first air inlet and flowing out of the second air outlet. At this time, the contact area between the cooling air and the inverter after passing through the inverter bottom rib is larger, so the heat dissipation effect is better.
[0023] To ensure that the cooling air flowing out of the wind guide cover can accurately enter the inverter lower cover and prevent escape, a wind guide lug 33 corresponding to the wind guide plate 50 and facilitating the passage of the cooling air is arranged on the first air inlet 31.
[0024] To facilitate the outflow of the cooling air that does not flow in a ring direction below the side wall of the inverter lower cover, a third air outlet 34 is arranged on the side of the inverter lower cover 30.
[0025] To further realize the circumferential flow of the cooling air in the lower cover of the inverter, a guiding arc convex strip 35 for guiding the cooling air to the second air outlet is arranged on the inner bottom surface of the lower cover 30 of the inverter, and the guiding arc convex strip is arranged at the corner. Preferably, a wind blocking convex strip 36 for preventing the cooling air from flowing out along the first air inlet is arranged on the bottom surface of the lower cover 30 of the inverter.
[0026] A plurality of sets of mounting holes 37 suitable for different inverter installations are arranged on the lower cover 30 of the inverter, and a contact preventing convex strip 38 for preventing the inverter from contacting the inner wall surface of the lower cover of the inverter is arranged on the lower cover 37 of the inverter for facilitating the cooling of the inverter, and the contact preventing convex strip is arranged through the mounting hole. Meanwhile, mounting through holes for mounting the lower cover of the inverter on the inverter support are arranged on the lower cover of the inverter, and since the inverter is arranged close to the muffler, a convex strip is arranged on the side of the lower cover of the inverter for contacting the inverter support for preventing the heat transfer of the rack from being reduced, and the convex strip is also arranged through the mounting through hole.
Claims
1. A top-mounted inverter cooling structure for an open rack variable frequency drive, comprising a first air outlet provided on a fan shroud (10), characterized in that: Also included is an inverter lower cover (30) for accommodating the inverter (20), wherein the inverter lower cover (30) is provided with a first air inlet (31) for the cooling air flowing out of the first air outlet to enter, the inverter lower cover (30) is provided with an inverter support (40) for mounting the inverter on the open rack variable frequency machine rack, the inverter support (40) is provided with a second air inlet for the cooling air flowing out of the first air outlet to pass through, the first air outlet is provided with a wind deflector (50) for ensuring that the cooling air can accurately pass through the second air inlet and then enter the first air inlet (31), the inverter lower cover (30) is provided with a second air outlet (32) on the side opposite to the air inlet direction of the first air inlet (31), and the side wall of the inverter lower cover (30) located in the air inlet direction of the first air inlet (31) is provided in a circular arc shape outwardly protruding.
2. The top-mounted inverter cooling structure for an open-frame variable frequency machine according to claim 1, characterized by: The first air inlet (31) is provided with a wind deflector lug (33) corresponding to the wind deflector (50) and facilitating the cooling air to pass through.
3. The top-mounted inverter cooling structure for an open-frame variable frequency machine according to claim 1, characterized by: The side of the inverter lower cover (30) is provided with a third air outlet (34).
4. The top-mounted inverter cooling structure for an open-frame variable frequency machine according to claim 1, characterized by: The inner bottom surface of the inverter lower cover (30) is provided with a guide arc convex strip (35) for guiding the cooling air to the second air outlet.
5. The top-mounted inverter cooling structure for an open frame variable frequency machine as defined in claim 1, wherein: The bottom surface of the inverter lower cover (30) is provided with a wind blocking convex strip (36) for preventing the cooling air from flowing out along the first air inlet.
6. The top-mounted inverter cooling structure for an open frame variable frequency machine as set forth in claim 1, wherein: The inverter lower cover (30) is provided with a plurality of groups of mounting holes (37) suitable for mounting different inverters, and the inverter lower cover (30) is provided with an anti-contact convex strip (38) for preventing the inverter from contacting the inner wall surface of the inverter lower cover.
7. The top-mounted inverter cooling structure for an open-frame variable frequency machine according to claim 1, characterized by: The upper end between the inverter lower cover (30) and the inverter (20) is provided with a sealing cotton for preventing the cooling air from running out.