Water-cooling pipeline device of small electric cabinet

Abstract

The invention discloses a water-cooling pipeline device of an electric control box for a small ship, which is characterized in that a shell of the electric control box for the small ship is made of a full metal plate material, and the interior is divided into a waterway area and an electrical area; the water cooling pipeline assembly is made of a 316L stainless steel material and comprises a water inlet pipe and a water outlet pipe; the connecting pipeline is a 316L stainless steel corrugated pipe and is used for communicating the water cooling pipeline assembly with the heat dissipation assembly; the external joint is a marine square shoulder joint conforming to the CB / T4328-2013A standard, is fixed on the outer side of the electric cabinet and is connected with the water cooling pipeline assembly; the waterway isolation assembly comprises an independent metal plate small box body in the electric control box and a double-end threaded connector with an O-shaped ring seal, the independent metal plate small box body is arranged in the electric control box to form a waterway area, and the double-end threaded connector is arranged at the joint of the waterway area and the electric area; the heat dissipation assembly comprises a heat dissipation aluminum plate internally provided with an integrated copper pipe, and the heat dissipation aluminum plate is used for installing a heating device and communicates with the water cooling pipeline assembly through a connecting pipeline.

Description

Technical Field

[0001] This invention relates to the field of electrical control box cooling technology, specifically to a small marine electrical control box water-cooling pipeline device suitable for confined spaces, possessing high isolation reliability and strong environmental adaptability. Background Technology

[0002] In existing cooling solutions for marine sheet metal electrical control boxes, fan cooling or natural cooling methods are generally used. Even water cooling solutions generally use flange connections, which are not suitable for small marine electrical control boxes where external connections need to conform to the standard marine flat shoulder joint CB / T4328-2013A.

[0003] Existing technologies generally use natural cooling or fan cooling. When using water cooling solutions, flange connections are typically used.

[0004] Natural cooling or fan cooling is only effective for some devices that do not generate a lot of heat. If the device that needs to be cooled is a power device such as IGBT that generates a lot of heat, water cooling will be more effective.

[0005] While flange connections offer good sealing, they require significant design and installation space, making them unsuitable for small marine electrical control boxes typically manufactured using sheet metal. Furthermore, external interfaces are usually welded and cannot be replaced.

[0006] Among existing electrical control box cooling technologies, one type of solution, such as the electrical control box heat dissipation system disclosed in patent (CN109246992A), is mainly used in temperature regulation equipment with evaporators, such as air conditioners, relying on the evaporator to provide low-temperature chilled water for cooling. Although this solution has a simple structure, it has obvious limitations: First, its applicability is limited, only applicable to equipment with evaporators, and cannot meet the independent cooling needs of small marine electrical control boxes; second, it does not use a marine standard interface (CB / T4328-2013 Type A flat shoulder connector), making it incompatible with shipboard interfaces; third, it is not designed for the confined space of marine equipment, lacking installation flexibility, and does not consider the strict isolation requirements between waterways and electrical areas in a marine environment, posing safety hazards.

[0007] Another type of water-cooling solution for marine electrical control boxes, such as the device disclosed in patent (CN115768047A), uses FEP flexible hoses as connecting pipes, with stainless steel water pipes combined with quick-connect fittings and marine-type flat-shoulder fittings, achieving a certain degree of disassembly and spatial adaptability. However, this solution still has technical defects: First, the connecting pipes use FEP flexible hoses, whose corrosion resistance and long-term structural stability are inferior to stainless steel corrugated pipes, making it difficult to adapt to the complex corrosive environment of ships; second, no independent water circuit isolation structure is set up, and water, electricity, and gas isolation is only achieved through a simple isolation layer, resulting in insufficient sealing reliability and easy leakage leading to electrical failures; third, the heat dissipation structure uses a combination of heat dissipation aluminum plates and cooling fans, which increases energy consumption, and the heat dissipation efficiency is affected by the fan's operating status; finally, no dedicated isolation joint with O-ring seal is designed, and the isolation effect between the water circuit and the electrical area needs to be improved.

[0008] In addition, some core components of existing water-cooling devices are fixed by welding, which makes them non-removable or inconvenient to disassemble, resulting in high maintenance and replacement costs. At the same time, the installation angle adjustment capability and space adaptability of existing devices still need to be optimized for the narrow installation space of 100~120mm for small marine electrical control boxes.

[0009] Therefore, there is an urgent need for a small marine electrical control box water-cooled piping device that is compatible with standard marine interfaces, reliably isolates water and electrical areas, is highly corrosion-resistant, flexible in installation, and easy to maintain, in order to overcome the shortcomings of existing technologies. Summary of the Invention

[0010] To address the problems existing in the prior art, this invention proposes a water-cooled piping device for small electrical control boxes. This device is suitable for water-cooled marine-grade small electrical control boxes with sheet metal casings, and requires external connectors to be designed according to the standard marine-grade flat-shoulder connector CB / T4328-2013A. This solves the problem of isolating the internal water circuit area from the electrical circuit area when using a water-cooled device in this type of electrical control box. This solution is low-cost, highly maintainable, and highly reliable.

[0011] To achieve the above objectives, the technical solution of the present invention is: a small marine electrical control box water-cooled piping device, comprising a small marine electrical control box, a water-cooled piping assembly, connecting pipes, an external connector, a water circuit isolation assembly, and a heat dissipation assembly; the small marine electrical control box is made of sheet metal, and its interior is divided into a water circuit area and an electrical circuit area; the water-cooled piping assembly is made of 316L stainless steel, including an inlet pipe and an outlet pipe; the connecting pipe is a 316L stainless steel corrugated pipe, used to connect the water-cooled piping assembly and the heat dissipation assembly; the external connector is a marine-type flat-shoulder connector conforming to CB / T4328-2013A standard, fixed to the outside of the electrical control box and connected to the water-cooled piping assembly; the water circuit isolation assembly includes an independent sheet metal small box inside the electrical control box and an O-shaped connector. The double-threaded connector with a ring seal is provided. The independent sheet metal box is set inside the electrical control box to form a water channel area. The double-threaded connector is set at the connection between the water channel area and the electrical area. The heat dissipation component includes a heat dissipation aluminum plate with an integrated copper tube inside. The heat dissipation aluminum plate is used to install heat-generating devices and is connected to the water cooling pipe assembly through connecting pipes.

[0012] Furthermore, the marine-type flat shoulder connector adapts to installation requirements by increasing the thread length and uses a thin nut to fix it to the electrical control box, achieving a detachable connection.

[0013] Furthermore, the electrical control box has a hexagonal feature corresponding to the installation position of the marine-type flat shoulder joint, which forms an anti-rotation structure after assembly. The marine-type flat shoulder joint can rotate outward in three stages, with each rotation angle being 60 degrees.

[0014] Furthermore, the independent sheet metal box is welded inside the electrical control box, making it suitable for the confined installation environment of small marine electrical control boxes.

[0015] Furthermore, the water-cooled piping assembly also includes quick-connect fittings, through which the inlet and outlet pipes are detachably connected to the 316L stainless steel corrugated pipe. The quick-connect fittings are standard outsourced components.

[0016] Furthermore, the cooling water circulation path is as follows: ship-specific interface → marine-type flat shoulder joint → inlet pipe → 316L stainless steel corrugated pipe → integrated copper pipe of heat dissipation aluminum plate → outlet pipe → marine-type flat shoulder joint → ship-specific recovery interface.

[0017] Furthermore, the left side of the double-threaded connector with O-ring seal is pressed by a nut at the connection between the water circuit area and the electrical area, while the right side connector structure is adapted to the actual specifications of the water cooling device connector in the electrical area.

[0018] Furthermore, the water pipes in the waterway area are welded together from marine-type flat shoulder joints, stainless steel pipes, and quick-connect fittings. After the sheet metal body of the electrical control box is set with limits, they can be installed at different angles to meet the installation requirements in different narrow spaces. After the corresponding components are installed in the width direction of the electrical control box, an 11cm distance is left for the water supply section to be installed.

[0019] Furthermore, the heat dissipation aluminum plate is fitted and installed in close contact with the heat-generating device, and the integrated copper pipe is integrally formed with the heat dissipation aluminum plate. The arrangement direction of the integrated copper pipe is adapted to the flow direction of the cooling water, thereby improving the heat exchange efficiency.

[0020] Furthermore, the device is also equipped with two flat-shoulder water pipes with external connectors of type CB / T4328-2013 A for supplying external cooling water to the inside of the tank. The size of the water pipes is determined according to the size of the tank and the required water flow rate and pressure.

[0021] Compared with the prior art, the present invention has the following significant advantages: 1. This invention requires less space; the entire water pipe assembly can be completed in a space of about 11cm. 2. The present invention has better adaptability, with no specific requirements for the position of the interface, and low requirements for design and manufacturing precision; 3. This invention can be installed inside a small marine electrical control box and is directly compatible with CB / T4328-2013A type marine flat shoulder connector. All components can be disassembled and replaced individually. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal partitioning of the small marine electrical control box of the present invention (waterway area and electrical area). Figure 2 .1 is a schematic diagram of the independent sheet metal small box structure of the present invention; Figure 2 .2 is a schematic diagram of the assembly of the independent sheet metal small box and the electrical control box body of the present invention; Figure 3 This is a schematic diagram of the double-threaded connector with O-ring seal of the present invention; Figure 4 This is an installation diagram illustrating the connection between the waterway area and the electrical area of ​​the present invention via a double-ended threaded connector; Figure 5 This is a schematic diagram of the structure of the water-cooled pipe assembly of the present invention; Figure 6 This is a top view of the installation of the marine-type flat shoulder connector and the electrical control box body of the present invention; Figure 7 This is a schematic diagram of the overall assembly of the water-cooled pipeline device for the small marine electrical control box of the present invention.

[0023] Explanation of the markings in the attached diagram: 1-Marine type flat shoulder connector; 2-Stainless steel pipe (inlet / outlet pipe); 3-Quick-connector; 4-Double-ended threaded connector with O-ring seal; 5-O-ring; 6-Thin hexagonal nut; 7-Sheet metal; 8-Independent sheet metal box; 9-Electrical control box. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 7 As shown, a small marine electrical control box water-cooled pipe device of the present invention includes a small marine electrical control box 9, a water-cooled pipe assembly, connecting pipes, external connectors, a sheet metal box 8, and a heat dissipation assembly.

[0026] The small marine electrical control box 10 has a full sheet metal casing (material 7), water-cooling device piping components (material 316L), and 316L corrugated pipes for connecting lines. External connectors are standard marine-grade flat-shoulder connectors (CB / T4328-2013A). The water-cooling piping components are disassembled and replaceable, offering good interchangeability and greater economic efficiency. The water pipe installation space width is between 100 and 120 mm.

[0027] This invention ( Figure 1 The carrier for this invention is a small marine electrical control box made of sheet metal. The right side is the electrical area, and the left side is the water system area, which is the key component of this invention. To ensure sufficient isolation between the water system and electrical areas after the interface is sealed, and to prevent unforeseen circumstances (such as water pipe leaks), the water system area is installed in a separate small sheet metal box. Figure 2 .1) Welded inside the electrical control box 9 ( Figure 2 .2) Formation. A specific double-threaded connector 4 with an O-ring seal 5 is provided at the connection between the waterway area and the electrical area. Figure 3 The left end is secured to the connection between the two areas with a nut, while the right end can be redesigned to fit the integrated water-cooling unit connector in the electrical area. Post-installation feedback is requested. Figure 4 .

[0028] The water pipes in the waterway area are welded together using marine-type flat-shoulder joints 1, stainless steel pipes 2, and quick-connect fittings 3. See details below. Figure 5 It can be installed at different angles after the sheet metal shape is designed and limited, meeting the installation needs of different narrow spaces.

[0029] Marine-grade flat shoulder joint 1 is a modification of the CB / T4328-2013 Type A flat shoulder joint, with an increased thread length to allow for secure fixing to the electrical control box using a thin nut, achieving a detachable design. The box features a hexagonal design, which, after assembly, creates an anti-rotation mechanism and allows for three separate 60-degree outward rotations to facilitate installation of connecting pipes in different spaces. Figure 6 Quick-connect couplings are standard parts and can be purchased directly, saving costs.

[0030] The flat-shoulder connector (CB / T4328-2013) is a type A external threaded connection for shipboard use. It has two water pipes: an inlet pipe and an outlet pipe. Cooling water enters through the inlet pipe, passes through a corrugated pipe, and then flows into the heat dissipation aluminum plate. The heat dissipation aluminum plate contains an integrated copper tube on which the heat-generating components are mounted. After circulating through the heat dissipation aluminum plate, the water flows out through the outlet pipe, thus achieving the purpose of cooling the heat-generating components.

[0031] To ensure adequate isolation between the water system and electrical systems after the interface is sealed, and to prevent unforeseen circumstances (such as water pipe leaks), the water system installation area is housed in a separate small sheet metal enclosure. Figure 2 1) Welded inside the electrical control box ( Figure 2 2) Formation.

[0032] This invention requires the fabrication of a small marine electrical control box containing electronic components that generate significant heat and require cooling. The control box should have a width sufficient to accommodate the components, leaving approximately 11cm for the water supply path; other dimensions are not limited.

[0033] In addition to the above, this invention also requires two flat-shoulder water pipes with external connectors of type A (CB / T4328-2013) to supply external cooling water to the inside of the enclosure. The size of the water pipes is determined according to the size of the enclosure and the required water flow rate and pressure. The flat-shoulder connectors are not welded to the control box as is typically designed; instead, they are secured with thin nuts and can be replaced during maintenance.

[0034] Determine the corresponding connector based on the cooling device interface on the back of the heating element during installation, roughly as follows: Figure 3 As shown, the interface design on the right side can be adjusted according to actual installation requirements. (Left side of the connector) Figure 3 ) and water pipes ( Figure 5 The connection uses stainless steel corrugated pipe, which is flexible and can be bent without damage according to the actual installation space.

[0035] The above is a design schematic of a water-cooled marine small electrical control box with a shell made of sheet metal, and the external connectors must be designed according to the standard marine flat shoulder connector CB / T4328-2013 A. Figure 7 The flat-shoulder connector (CB / T4328-2013) is a type A external threaded connection for shipboard use. It has two water pipes: an inlet pipe and an outlet pipe. Cooling water enters through the inlet pipe, passes through a corrugated pipe, and then flows into the heat dissipation aluminum plate. The heat dissipation aluminum plate contains an integrated copper tube on which the heat-generating components are mounted. After circulating through the heat dissipation aluminum plate, the water flows out through the outlet pipe, thus achieving the purpose of cooling the heat-generating components.

Claims

1. A water-cooled piping device for a small marine electrical control box, characterized in that, The system includes a small marine electrical control box, a water-cooled piping assembly, connecting pipes, external connectors, a water circuit isolation assembly, and a heat dissipation assembly. The small marine electrical control box has a full sheet metal casing and is internally divided into a water circuit area and an electrical circuit area. The water-cooled piping assembly is made of 316L stainless steel and includes an inlet pipe and an outlet pipe. The connecting pipes are 316L stainless steel corrugated pipes used to connect the water-cooled piping assembly and the heat dissipation assembly. The external connectors are marine-type flat-shoulder connectors conforming to CB / T4328-2013A standards, fixed to the outside of the electrical control box and connected to the water-cooled piping assembly. The water circuit isolation assembly includes an independent sheet metal enclosure within the electrical control box and a double-threaded connector with an O-ring seal. The independent sheet metal enclosure forms the water circuit area within the electrical control box, and the double-threaded connector is located at the connection between the water circuit area and the electrical circuit area. The heat dissipation assembly includes a heat-dissipating aluminum plate with an integrated copper pipe inside. The heat-dissipating aluminum plate is used to install heat-generating devices and is connected to the water-cooled piping assembly via connecting pipes.

2. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The marine-grade flat-shoulder connector adapts to installation requirements by increasing the thread length and uses a thin nut to fix it to the electrical control box, achieving a detachable connection.

3. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The electrical control box has a hexagonal feature corresponding to the installation position of the marine-type flat shoulder joint, which forms an anti-rotation structure after assembly. The marine-type flat shoulder joint can rotate outward in three parts, with each rotation angle being 60 degrees.

4. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The independent sheet metal box is welded inside the electrical control box, making it suitable for the confined installation environment of small marine electrical control boxes.

5. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The water-cooled piping assembly also includes quick-connect fittings, through which the inlet and outlet pipes are detachably connected to the 316L stainless steel corrugated pipe. The quick-connect fittings are standard outsourced components.

6. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The cooling water circulation path is as follows: ship-specific interface → marine-type flat shoulder joint → inlet pipe → 316L stainless steel corrugated pipe → integrated copper pipe of heat dissipation aluminum plate → outlet pipe → marine-type flat shoulder joint → ship-specific recovery interface.

7. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The double-threaded connector with O-ring seal is tightened at the connection between the water circuit area and the electrical area on the left side by a nut, while the connector structure on the right side is adapted to the actual specifications of the water cooling device connector in the electrical area.

8. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The water pipes in the waterway area are welded together from marine-type flat shoulder joints, stainless steel pipes, and quick-connect fittings. After the sheet metal body of the electrical control box is set with limits, they can be installed at different angles to meet the installation requirements in different narrow spaces. After the corresponding components are installed in the width direction of the electrical control box, an 11cm distance is left for the water supply section to be installed.

9. The water-cooled piping device for a small marine electrical control box according to claim 1, characterized in that, The heat dissipation aluminum plate is attached to the heat-generating device, and the integrated copper pipe is integrally formed with the heat dissipation aluminum plate. The arrangement direction of the integrated copper pipe is adapted to the flow direction of the cooling water, thereby improving the heat exchange efficiency.

10. The water-cooled piping device for a small marine electrical control box according to any one of claims 1-9, characterized in that, The device is also equipped with two flat-shoulder water pipes with external connectors of type CB / T4328-2013A for supplying external cooling water to the inside of the tank. The size of the water pipes is determined according to the size of the tank and the required water flow rate and pressure.

Images