Since the heat dissipation coefficient of water is greater than the heat dissipation coefficient of the underwater equipment and the heat dissipation coefficient of the silt, and the heat dissipation area of the underwater equipment is increased to be the surface area of the heat dissipation device after the heat dissipation device is arranged around an outside of the underwater equipment, the heat dissipation amount after providing the heat dissipation device is greater than the heat dissipation amount before providing the heat dissipation device under the condition that the underwater equipment generates the same heat, the heat dissipation area of the underwater equipment is increased and the heat conduction efficiency is improved, the heat dissipation efficiency of the underwater equipment during operation is improved, and the operational stability of the underwater communication system is improved.

In some embodiments of the present application, the shell body 110 and the water permeating component 200 are made of metal. Since the metal has a good thermal conductivity, it can assist the water in the heat dissipation chamber 120 to dissipate heat and thus improve the heat dissipation efficiency.

According to an exemplary embodiment, the shell body 110 and the water permeating component 200 may be made of such metal as copper, aluminum or iron. The shell body 110 and the water permeating component 200 made of metal can increase the structural strength of the heat dissipation device for the underwater equipment. In addition, the metal has a high thermal conductivity, which can further improve the heat dissipation efficiency for the underwater equipment.

It should be understood that, since the underwater equipment in the shallow water area needs to be buried under the water bottom, the heat dissipation device needs to be sleeved on the underwater equipment before the cable and the underwater equipment are placed into the water, and then the cable, together with the heat dissipation device and the underwater equipment, are coiled around equipment of the construction vessel, such as the cable-guiding rail and the wheel hub. Therefore, the diameter of the shell body 110 of the heat dissipation shell 100 must meet the restrictions of the cable-guiding rail and the wheel hub, so as to avoid the underwater equipment provided with the heat dissipation device from being away from the cable-guiding rail and the wheel hub or damaging the connected cable, when the underwater equipment is coiled on the cable-guiding rail and the wheel hub.

In the process of constructing the underwater communication system, the underwater equipment needs to be constructed together with the cable, therefore the heat dissipation device arranged around the underwater equipment needs to be placed into water and buried into the seabed together with the underwater equipment. During the construction process, the cable and the underwater equipment will be coiled around the cable-guiding rail and wheel hub of the construction vessel, such that the cable and the underwater equipment can be lowered into the water through rotation of the wheel hub. In addition, when the underwater communication system is constructed in a shallow water area, the cable and the underwater equipment need to be buried in the seabed, with the burying depth being at least 3 m. Therefore the heat dissipation device should have a certain structural strength, to avoid winding and damage to the structure of the heat dissipation device when the burying depth is large, diminishing the occurrence of such problems as deformation of the shell body 110 and reduction of the heat dissipation chamber 120.

In some embodiments, the heat dissipation shell 100 is provided with a fixing support 130. Specifically, the fixing support 130 is arranged between the housing of the underwater equipment and the shell body 110, and the fixing support 130 can provide support for the heat dissipation chamber 120, to improve the structural strength of the heat dissipation shell 100, thereby diminishing deformation of the heat dissipation shell 100 during the construction process, improving the reliability of the device, and avoiding reduced heat dissipation efficiency due to structural deformation.

In order to support the heat dissipation shell 100, as shown in FIG. 5, the fixing support 130 may include at least one annular sheet 131. It should be understood that the annular sheet 131 is a sheet structure of an annular shape with a certain thickness, and thus the annular sheet 131 has two cylindrical arced surfaces that are coaxial, that is, a cylindrical inner surface and a cylindrical outer surface, and a diameter of a cross section of the cylindrical inner surface is less than a diameter of a cross section of the cylindrical outer surface.

The diameter of the cross section of the cylindrical inner surface is the same as the diameter of the cross section of the housing of the underwater equipment, and the diameter of the cross section of the cylindrical outer surface is the same as the diameter of the cross section of the shell body 110. In an exemplary implementation, the annular sheet 131 shall be arranged coaxially with the underwater equipment and the shell body 110, such that the cylindrical inner surface abuts against the housing of the underwater equipment and the cylindrical outer surface abuts against the shell body 110.

In this way, the heat dissipation chamber 120 formed by the heat dissipation shell 100 and the water permeating component 200 is supported via the annular sheet provided between the underwater equipment and the shell body 110. Therefore, when the shell body 110 is pressed by an external force, the external force can be partially transmitted to the underwater equipment through the annular sheet 131 to reduce the risk of deformation of the overall structure of the heat dissipation device.

In some embodiments of the present application, as shown in FIG. 5, the number of the annular sheets 131 may be one. Specifically, the annular sheet 131 may be arranged at a central position of the heat dissipation chamber 120, that is, spaces at opposite sides of the annular sheet 131 are of the same size, and thus support strength of the shell body 110 is uniform, which thereby improves the structural strength of the heat dissipation device.

In an exemplary implementation, as shown in FIG. 6, the fixing support 130 may include three annular sheets 131 arranged between the underwater equipment and the shell body 110 in an array. Specifically, the first annular sheet 131a is arranged at the central position of the heat dissipation chamber 120, and the second annular sheet 131b and the third annular sheet 131c are respectively arranged at opposite sides of the first annular sheet 131a, with a distance between the first annular sheet 131a and the second annular sheet 131b being the same as a distance between the first annular sheet 131a and the third annular sheet 131c. By providing multiple annular sheets 131, the support strength of shell body 110 is increased, the structural strength of the heat dissipation device is increased, and the risk of compression deformation of the overall structure of the heat dissipation device is reduced.