Frequency conversion heat dissipation control electric box

Abstract

The utility model discloses a frequency conversion heat dissipation control electric box which comprises an electric box shell, a heat dissipation air duct, a frequency conversion assembly, a control circuit assembly and a heat dissipation fan. The electric box shell comprises a back plate, a cavity formed in the first side of the back plate, a fresh air inlet and a fresh air outlet, wherein the fresh air inlet and the fresh air outlet communicate with the cavity. A through mounting hole is formed in the back plate; the control circuit assembly is installed in the cavity. The frequency conversion assembly is mounted on the mounting hole and comprises a frequency conversion controller arranged in the cavity and a radiator which is arranged in the heat dissipation air duct and is in heat conduction connection with the frequency conversion controller; the heat dissipation air duct is arranged on the second side of the back plate and comprises an air inlet and an air outlet which are communicated with the fresh air outlet; the air inlet and the air outlet are formed in the two sides of the radiator respectively. The heat dissipation fan drives external airflow to enter the cavity from the fresh air inlet, flow through the control circuit assembly and / or the variable frequency controller, flow through the fresh air outlet and the air inlet, enter the heat dissipation air channel, flow through the radiator and then are exhausted through the air outlet, and the heat exchange efficiency is further improved.

Description

A variable frequency heat dissipation control box Technical Field

[0001] This utility model relates to the field of electrical box technology, and in particular to a frequency conversion heat dissipation control electrical box. Background Technology

[0002] With the rapid development of industrial automation, data centers, new energy (such as photovoltaic inverters and energy storage systems), and high-end manufacturing, the thermal management requirements for equipment are becoming increasingly stringent. Traditional heat dissipation systems (such as fixed-frequency fans and mechanical valve regulation) suffer from low energy efficiency and slow response, making it difficult to meet the temperature control requirements of high-precision and high-reliability equipment. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a variable frequency heat dissipation control box.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A variable frequency heat dissipation control box is constructed, including a box housing, a heat dissipation duct, a variable frequency component, a control circuit component, and a heat dissipation fan; the box housing includes a back plate, a cavity disposed on a first side of the back plate, and a fresh air inlet and a fresh air outlet communicating with the cavity; a through mounting hole is provided on the back plate; the control circuit component is installed in the cavity; the variable frequency component is installed on the mounting hole, including a variable frequency controller disposed in the cavity, and a radiator disposed in the heat dissipation duct and thermally connected to the variable frequency controller; the heat dissipation duct is disposed on a second side of the back plate, including an air inlet and an air outlet communicating with the fresh air outlet; the air inlet and air outlet are respectively disposed on both sides of the radiator; the heat dissipation fan drives external airflow to enter the cavity from the fresh air inlet, flow through the control circuit component and / or the variable frequency controller, enter the heat dissipation duct through the fresh air outlet and the air inlet, flow through the radiator, and then exit through the air outlet.

[0005] Furthermore, the cooling fan is a centrifugal fan, which has an air inlet and an air outlet. The installation height of the air inlet of the centrifugal fan is higher than the installation height of the control circuit assembly or the frequency converter, and the air outlet of the centrifugal fan is connected to the air inlet of the cooling duct.

[0006] Furthermore, the electrical box housing includes a side plate, and the fresh air inlet is disposed on the side plate.

[0007] Furthermore, the air inlet is located above the heat dissipation duct, and the air outlet is located below the heat dissipation duct.

[0008] Furthermore, the air intake direction of the fresh air inlet is perpendicular to the air outlet direction of the heat dissipation duct.

[0009] Furthermore, it also includes a cable inlet, which is located on the same side of the electrical box housing as the fresh air inlet, and is located below the fresh air inlet.

[0010] Furthermore, the back plate is provided with a plurality of cable inlet holes, and each of the cable inlet holes is covered with a movable baffle to allow for selection of the number and position of the cable inlet holes as needed.

[0011] Furthermore, the frequency converter heat dissipation control box also includes at least one box door panel, which forms a cuboid or a cube with the box housing, and the box door panel is provided with a touch screen mounting hole.

[0012] Furthermore, the variable frequency heat dissipation control box is also equipped with at least one touch screen and at least one box door panel. The control panel of the at least one touch screen is flush with the height of the at least one box door panel, and the wiring panel of the at least one touch screen is located inside the cavity of the box housing.

[0013] Furthermore, the opening size of the exhaust port of the centrifugal fan is not smaller than the opening size of the air inlet of the heat dissipation duct.

[0014] The present invention has the following beneficial effects: the cooling fan of the variable frequency heat dissipation control box drives the airflow to flow along a preset path, which can dissipate heat on the control circuit components and / or the variable frequency controller. In addition, the layout of the air inlet and outlet on both sides of the heat sink enhances air convection, significantly improves heat exchange efficiency, avoids heat accumulation in the cavity, and reduces the temperature rise of core components (such as the variable frequency drive and control circuit). Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0016] Figure 1 is a front view of the structure of the frequency conversion heat dissipation control box in some embodiments of the present invention;

[0017] Figure 2 is a side view of the structure of the frequency conversion heat dissipation control box in some embodiments of the present invention;

[0018] Figure 3 is a three-dimensional exploded view of the frequency conversion heat dissipation control box in some embodiments of this utility model; and

[0019] Figure 4 is a schematic diagram of the air duct path of the frequency conversion heat dissipation control box in some embodiments of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1-First electrical component; 2-Second electrical component; 3-Third electrical component; 4-Variable frequency controller; 5-Cooling fan; 6-Back panel; 7-Electrical box housing; 8-Cooling duct; 9-Fresh air inlet; 10-Cable inlet hole; 11-Radiator; 12-Fresh air outlet; 13-Air inlet; 14-Air outlet; 15-Radiator mounting hole. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0024] Figure 1 shows a variable frequency heat dissipation control box in some embodiments of the present invention. This box can be used to reduce the temperature rise of core components inside the box. The box includes a housing 7, a variable frequency drive assembly, a control circuit assembly, and a cooling fan 5. The housing 7 can be made of metal or plastic profiles and includes a back plate 6, a cavity on a first side of the back plate 6, a fresh air inlet 9, and a fresh air outlet 12 communicating with the cavity. The variable frequency drive assembly, control circuit assembly, and cooling fan 5 are mounted on the back plate 6 of the housing 7. The back plate 6 has through mounting holes for fixing the variable frequency drive assembly, control circuit assembly, and cooling fan 5. The mounting height of the cooling fan 5 is higher than the mounting height of the fixed variable frequency drive assembly and control circuit assembly. Understandably, the types and positions of the electronic and electrical components inside the cavity can be selected according to actual needs. The control circuit assembly is installed inside the cavity; the frequency converter assembly is installed on the mounting hole, including the frequency converter controller 4 installed inside the cavity, and the heat sink 11 installed in the heat dissipation duct 8 and thermally connected to the frequency converter controller 4; the specific models of the first electrical component 1, the second electrical component 2, and the third electrical component 3 can be designed and selected according to actual needs. The first electrical component 1, the second electrical component 2, and the third electrical component 3 are installed on the back plate 6 of the electrical box housing 7, placed in the cavity set on the first side of the back plate 6, and set in the heat dissipation duct 8.

[0025] Figure 2 shows the frequency converter heat dissipation control box of Figure 1 in some embodiments of this utility model. Figure 2 is a left view of the structure of the frequency converter heat dissipation control box. It can be understood that the frequency converter heat dissipation control box also includes a heat dissipation duct 8, which is disposed on the second side of the back plate 6. The heat dissipation duct 8 includes an air inlet 13 and an air outlet 14 communicating with the fresh air outlet 12; the air inlet 13 and the air outlet 14 are respectively disposed on both sides of the radiator 11.

[0026] Figure 3 is an exploded view of the variable frequency heat dissipation control box shown in Figure 1 of this utility model. The location of the fresh air outlet 12 is clearly visible in Figure 3, positioned above the variable frequency controller 4 mounted on the box housing 7. A centrifugal fan is fixed to the box housing 7 via mounting holes, and the centrifugal fan has an exhaust port. The box housing 7 also has radiator mounting holes 15 positioned below the fresh air outlet 12. The variable frequency controller 4 is fixed to the box housing 7 via mounting holes distributed around the radiator mounting holes 15. The variable frequency controller 4 is housed within the box cavity. A radiator 11, specifically for cooling the variable frequency controller 4, is mounted on the back of the controller. The radiator 11 is embedded in the radiator mounting holes 15 on the box housing 7 and is placed within the heat dissipation duct 8.

[0027] In Figure 4, fresh air enters the inner cavity of the electrical box through the fresh air inlet 9. The cooling fan 5 drives the fresh air to enter the cavity through the fresh air inlet 9, flowing through the control circuit components and / or the frequency converter 4. The fresh air enters through the air intake of the cooling fan 5 and is discharged through the air exhaust of the cooling fan 5, and then exits the inner cavity of the electrical box through the fresh air outlet 12. Fresh air enters the cooling duct 8 through the air inlet 13, flows through the radiator 11, and is discharged through the air outlet 14 of the cooling duct 8. The entire fresh air cooling process is divided into two stages: the first stage is the internal cooling of the electrical box cavity, and the second stage is the cooling of the cooling duct 8. The first stage of cooling is the internal cooling of the electrical box cavity: fresh air flows through the control circuit components and / or the frequency converter 4; the second stage of cooling is the cooling of the cooling duct 8: fresh air flows through the cooling duct 8 for cooling. The first and second stage cooling achieve dual cooling of the frequency converter 4.

[0028] In some embodiments of the present invention, the variable frequency heat dissipation control box includes a box housing 7, a heat dissipation duct 8, a variable frequency component, a control circuit component, and a heat dissipation fan 5. The box housing 7 is used to house the various components and provide support. The box housing 7 includes a back plate 6, a cavity disposed on a first side of the back plate 6, and a fresh air inlet 9 and a fresh air outlet 12 communicating with the cavity. The fresh air inlet 9 and the fresh air outlet 12 may be equipped with insect screens to prevent small animals from entering the cavity of the box through the fresh air inlet 9 and the fresh air outlet 12. The back plate 6 has a through mounting hole. The control circuit component is installed in the cavity. The variable frequency component is installed in the mounting hole, including a variable frequency controller 4 disposed in the cavity, and a heat sink 11 disposed in the heat dissipation duct 8 and thermally connected to the variable frequency controller 4. The heat sink 11 can use aluminum profiles for heat dissipation, and aluminum profiles have high heat dissipation properties. The thermal conductivity and lightweight design reduce the overall weight of the electrical box while ensuring heat dissipation capacity, facilitating transportation and installation. The heat dissipation duct 8 is located on the second side of the back panel 6, including an air inlet 13 and an air outlet 14 connected to the fresh air outlet 12. The air inlet 13 and air outlet 14 are respectively located on both sides of the radiator 11, forming a directional airflow path to avoid mixing of hot and cold air and improve heat exchange efficiency. The cooling fan 5 drives external airflow into the cavity from the fresh air inlet 9, flows through the control circuit components and / or the frequency converter 4, enters the heat dissipation duct 8 through the fresh air outlet 12 and air inlet 13, flows through the radiator 11, and is discharged through the air outlet 14. The cooling fan 5 effectively plans the air inlet and outlet paths. The fresh airflow path passes through the control circuit components and the frequency converter 4, directly carrying away the heat from the electronic components inside the cavity, avoiding excessive local temperature rise. The fresh air path covers the control circuit components and the frequency converter 4, avoiding the "local hot spot" problem in traditional air cooling and extending the lifespan of electronic components. The heat dissipation duct 8 is an independent duct. The heat dissipation duct 8 quickly dissipates the heat of the frequency converter 4 through the aluminum profile heat sink (a material with high thermal conductivity, such as aluminum profile). Combined with the forced convection of the fan, it achieves dual protection of "internal heat dissipation of the cavity + external air duct heat dissipation".

[0029] In some embodiments, the cooling fan 5 is a centrifugal fan with an intake and an exhaust port. The intake port of the centrifugal fan is installed at a height higher than the control circuit components or the frequency converter 4, and the exhaust port of the centrifugal fan is connected to the intake port 13 of the cooling duct 8. This high-level installation design of the centrifugal fan intake port (higher than the control circuit components and the frequency converter 4) utilizes the principle of natural hot air rising to form a physical isolation barrier, effectively preventing high-temperature airflow from re-entering the core heat-generating component area. Compared to traditional low-level intake solutions, this reduces the hot air recirculation rate. Furthermore, the high-level installation design of the centrifugal fan intake port (higher than the control circuit components and the frequency converter 4) constructs a vertical thermal circulation system of "high-level intake - directional exhaust," forming a vertical temperature gradient field. Compared to traditional planar cooling solutions, this further improves heat exchange efficiency and ensures that the junction temperature of key electronic components remains stable below a safe threshold.

[0030] In some embodiments, the electrical enclosure 7 includes a side panel, and a fresh air inlet 9 is disposed on the side panel. The fresh air inlet 9 at the side panel position facilitates the formation of a lateral air intake channel, which, together with the top / rear exhaust structure, forms a directional airflow, thereby improving the exchange efficiency of internal hot air and external cold air, effectively reducing the operating temperature of electrical and electronic components, and increasing the service life of electrical and electronic components.

[0031] In some embodiments, the air inlet 13 is located above the heat dissipation duct 8, and the air outlet 14 is located below the heat dissipation duct 8. By placing the air inlet 13 above the heat dissipation duct 8, the natural upward movement of hot air can be utilized to form a directional airflow, allowing cool air to flow from top to bottom through the radiator 11, thus enhancing heat exchange efficiency. Combined with the design of the air outlet 14 below the heat dissipation duct 8, a reverse convection mode of "upward suction and downward exhaust" is formed. The heat dissipation duct 8 increases the heat dissipation path for fresh air, effectively avoiding an excessively short heat dissipation path and improving the efficiency of heat removal per unit time.

[0032] In some embodiments, the air intake direction of the fresh air inlet 9 is perpendicular to the air outlet direction of the heat dissipation duct 8. This perpendicularity reduces space occupancy and increases the heat dissipation area within the same volume of equipment, making it particularly suitable for space-sensitive applications such as precision instruments and server racks.

[0033] In some embodiments, a cable inlet 10 is also included, which is located on the same side of the electrical box housing 7 as the fresh air inlet 9 and below the fresh air inlet 9. This same-side arrangement of the cable inlet 10 and the fresh air inlet 9 enables coordinated planning of the piping and cable channels, reducing the number of openings and processing steps in the electrical box housing 7, and lowering the risk of assembly errors. After fresh air enters the electrical box cavity, it carries the heat generated by the energized cables away from the cable body and into the heat dissipation duct 8, cooling the cables and preventing heat accumulation on the cable surface.

[0034] In some embodiments, the back panel 6 is provided with a plurality of cable entry holes 10, each covered by a movable baffle, allowing for selection of the number and position of the cable entry holes 10 as needed. The combination of the movable baffle and the multi-hole design enables dynamic adaptation of cable management. Users can freely open a specified number of cable entry holes 10 according to actual wiring needs, overcoming the limitations of traditional fixed-hole designs and significantly improving the device's compatibility with different operating conditions. By selectively enabling the cable entry holes 10, the structural strength loss caused by redundant openings can be minimized, while simultaneously achieving the shortest path planning for cable routing, effectively reducing electromagnetic interference risks and improving heat dissipation efficiency. The scalable structural design avoids material waste caused by excessive pre-reserved holes, while extending the device iteration cycle—when the system is upgraded, only partial modifications are needed instead of replacing the entire machine, reducing the total cost of ownership. The baffles of unused holes form a physical barrier layer, preventing dust and moisture from entering the device. Combined with a snap-on anti-loosening design, the protection level is improved, significantly enhancing operational stability in harsh environments.

[0035] In some embodiments, the frequency converter heat dissipation control box further includes at least one box door panel, which forms a cuboid or a cube with the box housing 7. The box door panel is provided with touchscreen mounting holes. The cuboid / cubic box design enables modular assembly, improves the structural strength and internal space utilization of the box, and facilitates standardized production and rapid on-site installation. The standardized interface design between the door panel and the housing enhances system expandability and supports flexible addition of functional modules later. The touchscreen mounting holes on the box door panel provide a mounting location for the touchscreen.

[0036] In some embodiments, the frequency converter heat dissipation control box is further provided with at least one touch screen and at least one box door panel. The control panel of the at least one touch screen is flush with the height of the at least one box door panel, and the wiring panel of the at least one touch screen is located inside the cavity of the box housing 7. The control box adopts an embedded human-machine interface to realize parameter visualization detection (such as temperature curves, current frequency), fault warning display, and remote control command input, thereby improving operating efficiency and reducing the frequency of manual inspection. The fact that the control panel of the at least one touch screen is flush with the height of the at least one box door panel ensures that the control panel of the at least one touch screen and the at least one box door panel are on the same horizontal plane, simplifying the sealing process at the housing joints (such as using an integral rubber gasket or welding process), reducing sealing leaks caused by structural height differences, thereby improving the box's protection against dust and liquid intrusion, especially suitable for humid and dusty industrial environments. The wiring panel of the at least one touch screen is located inside the cavity of the box housing 7, and the wiring panel of the at least one touch screen can be located in the fresh air path, reducing the operating temperature of the wiring panel of the touch screen and further extending the service life of the touch screen and the touch screen wiring panel.

[0037] In some embodiments, the opening size of the centrifugal fan's exhaust port is not smaller than the opening size of the heat dissipation duct 8's inlet 13, ensuring that there is no air leakage during the connection process between the centrifugal fan's exhaust port and the heat dissipation duct 8's inlet 13. Fresh air, driven by the centrifugal fan, is exhausted from the centrifugal fan's exhaust port and enters the heat dissipation duct 8's inlet 13. By optimizing the size matching relationship between the centrifugal fan's exhaust port and the heat dissipation duct 8's inlet 13, the gap effect at the interface is effectively eliminated, reducing air leakage and significantly improving the overall sealing performance of the duct system. Based on the principle of continuity equations, the design of the exhaust port and inlet 13 ensures that the airflow velocity remains stable at the connection point, avoiding turbulent losses caused by abrupt changes in cross-section. Stable airflow delivery ensures a uniform airflow velocity distribution within the heat dissipation duct 8, improving the uniformity of the flow field on the radiator surface, enhancing the heat exchange coefficient, and thus improving overall heat dissipation efficiency.

[0038] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A variable frequency heat dissipation control box, characterized in that, The device includes an electrical enclosure, a heat dissipation duct, a frequency converter assembly, a control circuit assembly, and a cooling fan. The electrical enclosure includes a back plate, a cavity on a first side of the back plate, and a fresh air inlet and a fresh air outlet communicating with the cavity. The back plate has a through mounting hole. The control circuit assembly is installed in the cavity. The frequency converter assembly is installed in the mounting hole and includes a frequency converter controller installed in the cavity and a radiator installed in the heat dissipation duct and thermally connected to the frequency converter controller. The heat dissipation duct is located on a second side of the back plate and includes an air inlet and an air outlet communicating with the fresh air outlet. The air inlet and air outlet are respectively located on both sides of the radiator. The cooling fan drives external airflow to enter the cavity from the fresh air inlet, flow through the control circuit assembly and / or the frequency converter controller, enter the heat dissipation duct through the fresh air outlet and the air inlet, flow through the radiator, and then exit through the air outlet.

2. The variable frequency heat dissipation control box according to claim 1, characterized in that, The cooling fan is a centrifugal fan, which has an air inlet and an air outlet. The air inlet of the centrifugal fan is installed at a height higher than the installation height of the control circuit assembly or the frequency converter. The air outlet of the centrifugal fan is connected to the air inlet of the cooling duct.

3. The variable frequency heat dissipation control box according to claim 1, characterized in that, The electrical box housing includes a side panel, and the fresh air inlet is disposed on the side panel.

4. The variable frequency heat dissipation control box according to claim 1, characterized in that, The air inlet is located above the heat dissipation duct, and the air outlet is located below the heat dissipation duct.

5. The frequency conversion heat dissipation control box according to claim 1, characterized in that, The air intake direction of the fresh air inlet is perpendicular to the air outlet direction of the heat dissipation duct.

6. The variable frequency heat dissipation control box according to claim 1, characterized in that, It also includes a cable inlet, which is located on the same side of the electrical box housing as the fresh air inlet, and is located below the fresh air inlet.

7. The variable frequency heat dissipation control box according to claim 1, characterized in that, The back plate is provided with a number of cable inlets, and each of the cable inlets is covered with a movable baffle to allow for selection of the number and position of the cable inlets as needed.

8. The frequency conversion heat dissipation control box according to claim 1, characterized in that, The variable frequency heat dissipation control box also includes at least one box door panel, which forms a cuboid or a cube with the box housing, and the box door panel is provided with a touch screen mounting hole.

9. The variable frequency heat dissipation control box according to claim 1, characterized in that, The variable frequency heat dissipation control box is also equipped with at least one touch screen and at least one box door panel. The control panel of the at least one touch screen is flush with the height of the at least one box door panel, and the wiring panel of the at least one touch screen is located inside the cavity of the box housing.

10. The frequency conversion heat dissipation control box according to claim 2, characterized in that, The opening size of the exhaust port of the centrifugal fan is not less than the opening size of the air inlet of the heat dissipation duct.

Images