Heat dissipation and ventilation structure of constant-voltage frequency converter

Abstract

The utility model discloses a heat dissipation and ventilation structure of a constant voltage frequency converter, relates to the field of constant voltage frequency converters, and aims to solve the problems that an existing heat dissipation device is poor in heat dissipation effect, and the reliability and the service life of the frequency converter are affected. The upper side of the partition plate is a storage cavity, a heat dissipation unit is arranged at the bottom of the connecting cavity, a ventilation unit is arranged at the upper end of the storage cavity, and an air outlet communicated with the ventilation unit is formed in the side edge of the outer shell. The heat dissipation performance of the frequency converter is improved, and efficient and stable operation of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of constant voltage frequency converters, in particular to a heat dissipation and ventilation structure of a constant voltage frequency converter. Background Art

[0002] With the rapid development of modern power electronics and microelectronics, constant voltage inverters, as an important part of power control equipment, have been widely used in industrial production fields such as power, chemical industry, coal mining, and metallurgy. Constant voltage inverters achieve precise control of motor speed by adjusting the power frequency, thereby achieving the purpose of energy saving and consumption reduction. However, as the power of the inverter increases, the heat generated during its operation also increases, which puts higher requirements on the stability and reliability of the equipment. Therefore, it has become an important direction for the current technological development to reasonably design the heat dissipation and ventilation structure to ensure the efficient and stable operation of the inverter.

[0003] Common heat dissipation technologies for inverters mainly include natural air cooling and forced air cooling. Although the natural air cooling method has a simple structure, the heat dissipation effect is limited and it is only suitable for low-power devices. The forced air cooling method uses fans and fin heat sinks to achieve air circulation. It has the advantages of simple structure and low price, but as the heat flux density increases, its heat dissipation capacity is gradually limited. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a heat dissipation and ventilation structure of a constant voltage inverter. Through this design, the problem that the existing heat dissipation device has poor heat dissipation effect and affects the reliability and service life of the inverter is effectively solved.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model comprises an outer shell, a partition plate is fixedly connected inside the outer shell, the lower side of the partition plate is a circuit connection cavity, the upper side of the partition plate is a storage cavity, a heat dissipation unit is provided at the bottom of the connection cavity, a ventilation unit is provided at the upper end of the storage cavity, and an air outlet connected to the ventilation unit is provided on the side of the outer shell;

[0006] The ventilation unit comprises an exhaust box, an exhaust fan is rotatably connected inside the exhaust box, the exhaust box is fixedly mounted at the upper end of the connecting cavity, and an exhaust port bent downward is provided on the inner side of the exhaust box.

[0007] Preferably, the heat dissipation unit includes a first air inlet, which is located on one side of the outer shell, a filter plate is installed in the connecting cavity inside the first air inlet, the filter plate is located at the upper end of the partition plate, and a heat dissipation fan is rotatably connected to the partition plate.

[0008] Preferably, a second air inlet is provided on the outer shell at the lower side of the air exhaust port, and a dustproof component is fixedly connected to the second air inlet.

[0009] Preferably, the dustproof component includes a fixing frame, the fixing frame is provided with a plurality of fan blades distributed at equal intervals, and the fan blades are an inverted V-shaped structure.

[0010] Preferably, a rain shield is fixedly connected to the shell, and the rain shield is located outside the second air inlet.

[0011] Preferably, dustproof nets are installed at both the first air inlet and the air outlet.

[0012] Compared with the prior art, the utility model has the following outstanding advantages:

[0013] The heat dissipation unit of the utility model is located at the lower end of the storage cavity which is placed horizontally, and the heat dissipation unit is located at the upper end of the storage cavity. The heat dissipation unit is used to draw air outwards to discharge the hot air in the storage cavity outwards, thereby improving the internal air circulation, avoiding heat retention in the outer shell, improving the heat dissipation performance of the inverter, and ensuring efficient and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the rear end of this utility model.

[0016] Figure 3 It is a partial cross-sectional structural diagram of the filter plate of the utility model.

[0017] Figure 4 This is a schematic diagram of the axial structure of the ventilation unit of the utility model.

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the upper end of the exhaust box of the utility model.

[0019] Numbers in the figure: 1. outer shell; 2. partition plate; 3. circuit connection cavity; 4. storage cavity; 5. heat dissipation unit; 501. first air inlet; 502. filter plate; 503. heat dissipation fan; 6. ventilation unit; 601. exhaust box; 602. exhaust fan; 603. exhaust port; 7. air outlet; 8. second air inlet; 9. fixing frame; 10. fan blades; 11. rain shield; 12. dust net. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model are clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Please see attached Figure 1-5 The present embodiment provides a heat dissipation and ventilation structure of a constant voltage inverter, comprising an outer shell 1, a partition plate 2 is fixedly connected inside the outer shell 1, a circuit connection cavity 3 is provided on the lower side of the partition plate, a storage cavity 4 is provided on the upper side of the partition plate 2, a heat dissipation unit 5 is provided at the bottom of the connection cavity, a ventilation unit 6 is provided at the upper end of the storage cavity 4, an air outlet 7 connected to the ventilation unit 6 is provided at the side of the outer shell 1; the ventilation unit 6 comprises an exhaust box 601, an exhaust fan 602 is rotatably connected inside the exhaust box 601, the exhaust box 601 is fixedly installed at the upper end of the connection cavity, and an exhaust port 603 bent downward is provided on the inner side of the exhaust box 601.

[0022] A mounting hole is provided at the upper end of the outer shell 1 for fixing the outer shell 1. The lower end of the outer shell 1 is bottomless. A connector is provided in the connecting cavity, which is connected to the external wiring. The storage cavity 4 is used to install electronic components, which are installed on the front side wall and the rear side wall of the storage cavity 4. The heat dissipation unit 5 in the storage cavity 4 is located at the bottom of the storage cavity 4, and the ventilation unit 6 is located at the upper end of the storage cavity 4. The heat dissipation fan 503 in the heat dissipation unit 5 blows air upward, and the exhaust port 603 in the ventilation unit 6 is bent downward. The exhaust fan 602 is installed in the exhaust box 601. The heat dissipation unit 5 blows air upward, and due to the characteristic of hot air moving upward, the hot air in the storage cavity 4 will be concentrated at the upper end of the storage cavity 4. The hot air at the upper end of the storage cavity 4 will be discharged from the air outlet 7 under the action of the ventilation unit 6, thereby achieving the purpose of heat dissipation. Compared with the transmission heat dissipation system, the air flow inside the outer shell 1 can be improved, and the internal heat dissipation performance can be improved.

[0023] The first air inlet 501 is located on one side of the outer shell 1, and the filter plate 502 separates the cooling fan 503 and the electronic components to prevent the cooling fan 503 from hitting the circuits of the electronic components during rotation. While ensuring that the heat dissipation unit 5 achieves the heat dissipation purpose, it avoids interference with the internal circuit. There are two first air inlets 501, and the openings of the two first air inlets 501 are relatively small, which ensures ventilation while preventing rainwater from entering the outer shell 1 through the vents, thereby ensuring the safety of internal components.

[0024] The second air inlet 8 is located on the other side of the outer shell 1, and the first air inlet 501 and the second air inlet 8 are arranged opposite to each other.

[0025] A fixing frame 9 is installed at the second air inlet 8, and a plurality of fan blades 10 are arranged at equal intervals on the fixing frame 9. The plurality of fan blades 10 are all of a bent structure. The equidistant arrangement of the fan blades 10 plays a role in dust prevention and ventilation, can block debris, prevent the internal components from being covered by too much dust, ensure the heat dissipation function of the components, and improve the heat dissipation effect of the internal components.

[0026] Furthermore, in order to improve the protection of the internal components of the outer shell 1, a plurality of rain shields 11 are installed outside the second air inlet 8. The rain shields 11 prevent external rainwater from entering the outer shell 1 and ensure the safety of the internal components. Furthermore, dustproof nets 12 are installed at the first air inlet 501 and the exhaust port 603. There are diamond-shaped leakage holes on the protective net for ventilation.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat dissipation and ventilation structure of a constant voltage inverter, characterized in that: It comprises an outer shell (1), a partition plate (2) is fixedly connected inside the outer shell (1), the lower side of the partition plate is a line connection cavity (3), the upper side of the partition plate (2) is a storage cavity (4), a heat dissipation unit (5) is provided at the bottom of the connection cavity, a ventilation unit (6) is provided at the upper end of the storage cavity (4), and an air outlet (7) connected to the ventilation unit (6) is provided on the side of the outer shell (1); The ventilation unit (6) comprises an exhaust box (601), an exhaust fan (602) being rotatably connected inside the exhaust box (601), the exhaust box (601) being fixedly mounted at the upper end of the connecting cavity, and an exhaust port (603) bent downward is provided on the inner side of the exhaust box (601).

2. The heat dissipation and ventilation structure of a constant voltage inverter according to claim 1, characterized in that: The heat dissipation unit (5) comprises a first air inlet (501), the first air inlet (501) being located at one side of the outer shell (1), a filter plate (502) being installed in a connecting cavity inside the first air inlet (501), the filter plate (502) being located at the upper end of a partition plate (2), and a heat dissipation fan (503) being rotatably connected to the partition plate (2).

3. The heat dissipation and ventilation structure of a constant voltage inverter according to claim 1, characterized in that: A second air inlet (8) is provided on the outer shell (1) at the lower side of the air exhaust port (603), and a dustproof component is fixedly connected to the second air inlet (8).

4. The heat dissipation and ventilation structure of a constant voltage inverter according to claim 3 is characterized in that: The dustproof component comprises a fixing frame (9), the fixing frame (9) being provided with a plurality of fan blades (10) distributed at equal intervals, the fan blades (10) being an inverted V-shaped structure.

5. The heat dissipation and ventilation structure of a constant voltage inverter according to claim 3, characterized in that: A rain shield (11) is fixedly connected to the shell, and the rain shield (11) is located outside the second air inlet (8).

6. The heat dissipation and ventilation structure of a constant voltage inverter according to claim 2, characterized in that: Dust-proof nets (12) are installed at both the first air inlet (501) and the air outlet (603).

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