Alternating current and direct current variable frequency generator
By designing specific airflow paths and modular structures in AC/DC frequency converter generators, the problem of uneven heat dissipation of the circuit is solved, efficient cooling effect is achieved, ensuring the stable operation of the motor at high power, and simplifying the assembly process.
Patent Information
- Application Number
- CN202323408892.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-13
AI Technical Summary
When existing AC/DC frequency converter is operating at high power, the circuit structure generates a lot of heat, but due to the unspecific airflow path, it cannot effectively dissipate heat, resulting in the uneven heat source distribution and the unspecific distribution of the cooling airflow path, which cannot meet the stable operation. Require.
An AC-DC frequency converter is designed. By setting air inlets and fans inside the housing, the airflow path is changed using the spatial arrangement characteristics of the DC controller, so that the cooling airflow fully covers the circuit module, ensuring that the parts with more heat are fully cooled. , and simplify assembly and maintenance through modular structure.
It realizes efficient circuit cooling, ensuring stable operation of the motor under high power operation, and has a compact structure, small area and easy assembly.
Smart Images
Figure CN222263400U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an AC / DC variable frequency generator. Background Art
[0002] With the frequent occurrence of outdoor construction work and outdoor entertainment activities, the demand for outdoor electricity has become very obvious. Power supply equipment in the form of energy storage power supply, internal combustion engine power supply, solar power supply, etc. has been fully popularized and utilized. Due to different working conditions, there are large differences in the power requirements and AC / DC power supply requirements of power supply equipment. The power demand for high-power, AC / DC outdoor construction work needs to be met by power supply equipment powered by internal combustion engine power supply, such as the common AC / DC variable frequency generator, which integrates internal combustion engines, generators, control circuits and other components, and can conveniently provide AC and DC power to electrical appliances in areas far away from the power grid. The need to cope with the power consumption of engineering equipment requires this type of AC / DC variable frequency generator to cope with high-power operating conditions. Once the power is increased, the circuit structure inside the AC / DC variable frequency generator will generate a lot of heat, which requires heat dissipation. In the prior art, the AC inverter control and output, DC control and output functions inside the AC / DC variable frequency generator are implemented by multiple stacked circuits, and the circuits are flattened inside the AC / DC variable frequency generator. Although the fan on the internal combustion engine can drive the air flow inside the AC / DC variable frequency generator, the airflow path is not specifically scattered in the circuit surface area, and there is a situation where the parts of the circuit surface with more heat output are separated from the cooling airflow path, and thus it is impossible to perform more heat dissipation treatment on the parts of the circuit surface with more heat output, that is, the contradiction between the uneven distribution of heat sources and the indefinite distribution of cooling airflow paths. Therefore, the heat dissipation function inside this type of AC / DC variable frequency generator cannot fully meet the requirements of its stable operation. Summary of the invention
[0003] The technical problem to be solved by the utility model is how to effectively dissipate heat from a circuit with uneven heat distribution, thereby obtaining an AC / DC variable frequency generator with good internal circuit cooling effect.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the AC / DC variable frequency generator includes a shell and an internal combustion engine, an air inlet I is provided on the side of the shell, the internal combustion engine is located inside the shell and a fan is provided on the internal combustion engine, a power control module is fixedly installed inside the shell, the power control module includes an AC inverter, a DC controller, and a fixed plate, the AC inverter and the DC controller are both flat rectangular structures, the AC inverter and the DC controller are connected by a fixed plate, the fixed plate is in an inverted T shape, one end of the AC inverter is fixedly connected to one end of the DC controller through a fixed plate, and the other end of the AC inverter is fixedly connected to the other end of the DC controller through another fixed plate, the AC inverter and the DC controller are in a vertical position relationship and are separated from each other, the DC controller is located above the AC inverter, the DC controller extends in the vertical direction, and the AC inverter extends in the horizontal direction, the air inlet I faces the DC controller, and the DC controller is located between the air inlet I and the fan.
[0005] The design idea of the present application is to first retain the modular design of the circuit to ensure that the circuits used to control the AC inverter control and output, and the DC control and output functions are installed inside the shell in a modular structure, which is convenient for procurement management, simplifies the assembly process, and is also conducive to maintenance and replacement; secondly, the DC controller and the AC inverter are arranged separately according to the amount of heat output. Since the heat generated by the DC controller when working is greater than the heat generated by the AC inverter when working, the DC controller can be placed on the trunk of the air flow path, which can ensure that the cooling airflow can fully cover the DC controller, that is, the DC controller is completely wrapped by the cooling airflow; and the spatial layout characteristics of the DC controller are used to change the airflow path. In the present technical solution, the air entering the shell from the air inlet I flows directly toward the DC controller, but the DC controller is arranged vertically, and the airflow will be blocked by the DC controller and change the path, and the airflow will move in the vertical direction, and then the airflow will flow through the upper part of the horizontally arranged AC inverter. The flow direction of the airflow from the air inlet I to the DC controller is inclined to the DC controller, and the flow direction of the airflow from the DC controller to the AC inverter is inclined to the AC inverter. This airflow coverage method can effectively introduce cooling air and promote air to flow between various components. The power control module of this structure has the advantage of compact structure and small occupied area.
[0006] The DC controller bears the airflow in a head-on manner, which necessarily requires a stable support structure. For this purpose, a mounting structure corresponding to the power control module is provided inside the housing, and the mounting structure includes a limiting protrusion and a connecting protrusion. The limiting protrusion and the connecting protrusion both protrude from the inner surface of the bottom of the housing. The power control module is embedded in the area between the limiting protrusion and the connecting protrusion. The connecting protrusion is fixedly connected to one of the fixing plates by bolts, and the AC inverter is fixedly connected to the housing by bolts. The area between the limiting protrusion and the connecting protrusion facilitates the positioning operation during assembly.
[0007] In order to dissipate heat at the bottom of the AC inverter, an air inlet II is provided at the bottom of the housing, and the air inlet II faces the AC inverter.
[0008] The utility model adopts the above technical solution: the AC / DC variable frequency generator is modularly arranged, arranged in zones according to heat dissipation requirements and has a compact structure, which can ensure that it is wrapped by cooling air to obtain efficient heat dissipation and cooling effects, and also has the advantage of easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.
[0010] Figure 1 This is a schematic diagram of the internal structure of an AC / DC frequency conversion generator of the utility model;
[0011] Figure 2 This is a schematic diagram of the installation of a power control module of an AC / DC variable frequency generator of the utility model. Figure Ⅰ ;
[0012] Figure 3 This is a schematic diagram of the installation of a power control module of an AC / DC variable frequency generator of the utility model. Figure II ;
[0013] Figure 4 This is a schematic diagram of the installation of a power control module of an AC / DC variable frequency generator of the utility model. Figure III . DETAILED DESCRIPTION
[0014] like Figure 1 , 2 As shown in , 3 and 4, the housing 1, the internal combustion engine 2 and the power control module 3 of the AC / DC variable frequency generator are fixedly installed inside the housing 1. The internal combustion engine 2 is provided with a fan and a cover 4, and the fan is located inside the cover 4. The rotation of the fan can drive the air flow inside the housing 1. The side of the housing 1 is provided with an air inlet Ⅰ5 and an air inlet Ⅱ6, and the air inlet Ⅰ5 and the air inlet Ⅱ6 are directly connected to the inside of the housing 1. The power control module 3 is located in the area between the air inlet Ⅰ5 and the internal combustion engine 2.
[0015] The power control module 3 includes an AC inverter 7, a DC controller 8, and a fixed plate 9. The AC inverter 7 and the DC controller 8 are both flat rectangular structures, and the AC inverter 7 and the DC controller 8 are connected by the fixed plate 9 to form a modular component. Specifically, the fixed plate 9 is in an inverted T shape, and a fixed plate 9 is fixed at each end of the AC inverter 7. The fixed plate 9 is fixed at the wide side of the AC inverter 7 by bolts. Each fixed plate 9 is fixedly connected to the DC controller 8 by bolts, and the fixed plate 9 is located at the wide side of the DC controller 8, so that one end of the AC inverter 7 is fixedly connected to one end of the DC controller 8 by a fixed plate 9, and the other end of the AC inverter 7 is fixedly connected to the other end of the DC controller by another fixed plate 9; after the two are combined, the AC inverter 7 and the DC controller 8 are in a vertical position relationship and the AC inverter 7 and the DC controller 8 are separated.
[0016] like Figure 2 , 3 As shown, a mounting structure corresponding to the power control module 3 is provided inside the housing 1, and the mounting structure includes a limiting protrusion 10 and a connecting protrusion 11. The mounting structure is located at the bottom surface inside the housing 1, so the limiting protrusion 10 and the connecting protrusion 11 both protrude from the inner surface of the bottom of the housing 1. During installation, the power control module 3 is embedded in the area between the limiting protrusion 10 and the connecting protrusion 11, so that the power control module 3 can be positioned, and then the connecting protrusion 11 is fixedly connected to one of the fixing plates 9 by bolts, as shown in FIG. Figure 4 As shown. In addition, the AC inverter 7 is fixedly connected to the housing 1 by bolts, and there is a gap between the lower part of the AC inverter 7 and the housing 1 after the connection. After installation, the DC controller 8 is located above the AC inverter 7, the DC controller 8 is vertically arranged, and the AC inverter 7 is horizontally arranged, so that the DC controller 8 extends in the vertical direction and the AC inverter 7 extends in the horizontal direction. In addition, the air inlet Ⅰ5 faces the DC controller 8, and the air inlet Ⅱ6 faces the AC inverter 7. The DC controller 8 is located between the air inlet Ⅰ5 and the fan, and the air inlet Ⅰ5, the DC controller 8, and the fan are at the same horizontal height.
[0017] When working, the fan on the internal combustion engine 2 rotates, causing the air inside the housing 1 to flow toward the location of the internal combustion engine 2, thereby driving the air flow between the fan and the air inlet Ⅰ5 and the air inlet Ⅱ6. The external air enters the housing 1 through the air inlet Ⅰ5 and the air inlet Ⅱ6. Figure 1As shown in the figure, the dotted line part is the air flow path. The air flow direction entering the shell 1 from the air inlet Ⅰ5 is inclined to the DC controller 8, and the air flow direction entering the shell 1 from the air inlet Ⅱ6 is perpendicular to the AC inverter 7, and the air blows to the lower part of the AC inverter 7; the air flow entering the shell 1 from the air inlet Ⅰ5 is blocked by the DC controller 8, one part flows from the DC controller 8 to the AC inverter 7, and the other part moves along the top of the DC controller 8 and then moves toward the position of the fan; the flow direction of the air flow from the DC controller 8 to the AC inverter 7 is inclined to the AC inverter 7, and this part of the air blows to the upper part of the AC inverter 7. The air can form a vortex on the side of the DC controller 8 facing the fan, and then the entire DC controller 8 is wrapped on the trunk of the air flow path.
Claims
1. An AC / DC variable frequency generator, comprising a housing (1) and an internal combustion engine (2), wherein an air inlet I (5) is provided on a side of the housing (1), the internal combustion engine (2) is located inside the housing (1) and a fan is provided on the internal combustion engine (2), characterized in that: A power control module (3) is fixedly installed inside the housing (1), and the power control module (3) comprises an AC inverter (7), a DC controller (8), and a fixing plate (9). The AC inverter (7) and the DC controller (8) are both in a flat rectangular parallelepiped structure. The AC inverter (7) and the DC controller (8) are connected via the fixing plate (9), and the fixing plate (9) is in an inverted T shape. One end of the AC inverter (7) is fixedly connected to one end of the DC controller (8) via a fixing plate (9). The other end of the AC inverter (7) is fixedly connected to the other end of the DC controller via another fixing plate (9); the AC inverter (7) and the DC controller (8) are in a vertical positional relationship and are separated from each other; the DC controller (8) is located above the AC inverter (7); the DC controller (8) extends in a vertical direction; the AC inverter (7) extends in a horizontal direction; the air inlet I (5) faces the DC controller (8); and the DC controller (8) is located between the air inlet I (5) and the fan.
2. The AC / DC variable frequency generator according to claim 1, characterized in that: The housing (1) is provided with a mounting structure corresponding to the power control module (3), the mounting structure comprising a limiting protrusion (10) and a connecting protrusion (11), the limiting protrusion (10) and the connecting protrusion (11) both protrude from the inner surface of the bottom of the housing (1), the power control module (3) is embedded in the area between the limiting protrusion (10) and the connecting protrusion (11), the connecting protrusion (11) is fixedly connected to one of the fixing plates (9) by bolts, and the AC inverter (7) is fixedly connected to the housing (1) by bolts.
3. The AC / DC variable frequency generator according to claim 1, characterized in that: An air inlet II (6) is provided at the bottom of the housing (1), and the air inlet II (6) faces the AC inverter (7).