7results about How to "Increase the effective cooling area" patented technology

This invention provides a cooling circulation device for a wind turbine nacelle, comprising a nacelle, with a cooling circulation mechanism installed on the upper part of the nacelle. The cooling circulation mechanism includes an upper cover and a lower cover; the upper and lower covers are fixedly connected to each other, and the bottom opening of the lower cover communicates with the upper part of the nacelle; a circulation pump is fixedly installed inside the upper cover, with the output end of the circulation pump connected to a first circulation pipe and the input end connected to a second circulation pipe. This invention constructs a closed cooling circuit on the top of the nacelle, consisting of a circulation pump, circulation pipes, and upper and lower double-layered serpentine coils, enabling the coolant to circulate continuously within the nacelle and perform large-area heat exchange, achieving uniform absorption and rapid conduction of heat from the nacelle; the upper and lower serpentine coils are stacked, expanding the effective heat dissipation area, allowing the device to maintain stable heat dissipation efficiency even during high-load power generation, thereby ensuring the long-term reliable operation of the power generation system.

This utility model relates to the field of automotive parts technology, specifically an automotive brake disc, including an outer disc body and an inner disc body disposed on the back of the outer disc body. A connecting member is disposed between the outer disc body and the inner disc body. The outer disc body has several first heat dissipation holes, which are connected to the interior of a heat dissipation cavity. This automotive brake disc, through the coordinated use of the outer disc body, inner disc body, heat dissipation cavity, connecting member, first heat dissipation holes, mounting part, mounting hole, and second heat dissipation holes, allows for rapid heat generation due to friction between the brake disc and brake pads during braking. The heat dissipation grooves, first heat dissipation holes, and second heat dissipation holes on the surfaces of the outer and inner disc bodies, with their unique structure and layout, guide air to form a complex airflow when the brake disc rotates, increasing the contact time and area between the air and the brake disc surface, significantly improving heat exchange efficiency and enhancing heat dissipation performance. Furthermore, the heat dissipation grooves increase the effective heat dissipation area of ​​the brake disc.

The utility model belongs to the technical field of automobile parts, and provides an element heat dissipation structure which comprises a heat conduction substrate installed on an element, the top of the heat conduction substrate is provided with a plurality of grooves arranged in parallel, each groove is internally provided with a phase change heat conduction layer, the back face of the heat conduction substrate is provided with a plurality of first-level fins distributed in parallel at intervals, and the first-level fins are arranged in parallel at intervals. Secondary fins are arranged between the opposite surfaces of every two adjacent primary fins, the secondary fins are obliquely arranged, a flow guide channel is formed between every two secondary fins, and an airflow guide cover is arranged at the top of the heat conduction substrate; according to the utility model, by arranging the heat dissipation device, heat dissipation can be carried out on elements with insufficient heat dissipation, so that the situation that the temperature of the elements is too high is effectively avoided, and the safety is improved.

This invention discloses a MEMS synthetic jet heat sink and array heat sink based on an asymmetric dual-diaphragm and a top-surface through-flow channel, comprising a PCB substrate, a silicon substrate, a first piezoelectric diaphragm, a second piezoelectric diaphragm, and a top frame. The lower surface of the PCB substrate is used for mounting to a heat source and is a complete plane; the silicon substrate is disposed on the PCB substrate, and a vibration cavity is formed within the silicon substrate; the first and second piezoelectric diaphragms are sealed and connected to the silicon substrate, and together enclose the vibration cavity; the two piezoelectric diaphragms are arranged asymmetrically relative to the PCB substrate; the top frame is disposed above the first and second piezoelectric diaphragms and connected to the PCB substrate; the top frame has an opening; the opening communicates with the vibration cavity, together forming a top-surface through-flow bidirectional channel, so that the air intake and exhaust processes of the heat sink are completed through the top-surface through-flow bidirectional channel.

The invention discloses a cutting blade and a cutting tool, and relates to the field of cutters, the cutting blade comprises a top surface, a bottom surface and side surfaces, the top surface and the bottom surface are oppositely arranged along the thickness direction of the cutting blade, the side surfaces are respectively connected with the top surface and the bottom surface, and the top surface and the bottom surface are oppositely arranged along the thickness direction of the cutting blade. A cutting edge is formed at the joint of the side surface and the top surface; wherein the top surface comprises a margin surface, a front cutter surface and a groove part which are connected in sequence, the margin surface extends in the extending direction of the cutting edge, a plurality of notch parts which are distributed at intervals in the extending direction of the cutting edge are formed in the surface of the margin surface, the front cutter surface obliquely extends from the margin surface to the groove part, and the notch parts are distributed at intervals in the extending direction of the cutting edge. And a plurality of convex parts which are arranged in sequence are formed on the surface of the groove part. According to the cutting blade provided by the embodiment of the invention, local high temperature and thermal stress concentration can be reduced, the heat dissipation efficiency is improved, and the service life of a cutting tool is effectively prolonged.

The invention discloses a casting die head for film production and casting film production equipment. A die head body of the casting die head is provided with a material injection opening, a transverse seam-shaped outlet and a plurality of heat dissipation grooves which are transversely arranged side by side, and notches of the heat dissipation grooves are exposed for heat dissipation. According to the cast film production equipment, raw materials are heated and melted into molten materials through an extruder, the molten materials are injected into an inner runner of a die head from a material injection opening of the cast die head, and a transverse seam-shaped outlet of the cast die head is aligned with a cooling roller so that sheet-shaped material bodies formed by extruding the molten materials outwards can flow onto the cooling roller; and the cooling roller is used for quenching and shaping the sheet-shaped material body to prepare a thin film. According to the casting die head, the heat dissipation groove is formed in the die head body, and the groove opening of the heat dissipation groove is exposed, so that the effective heat dissipation area of the die head is remarkably increased, and the die head is not prone to overheating in the production process. The multiple heat dissipation grooves are arranged in parallel in the transverse direction and are consistent with the transverse seam-shaped outlet in direction, so that the temperature of the die head body can be uniformly distributed, and local overheating is effectively avoided.

The utility model discloses an LED court lamp capable of being spliced. The LED court lamp comprises a power source assembly, a plurality of lighting assemblies, a mounting assembly, a first lampshade shell, a second lampshade shell and a splicing assembly arranged between the top of the first lampshade shell and the top of the second lampshade shell. The first lampshade shell is provided with a power supply bin with a bottom opening and at least one lighting bin, and the second lampshade shell is provided with at least one lighting bin with a bottom opening; a plurality of radiating fins which are arranged in parallel are arranged at the tops of the first lampshade shell and the second lampshade shell corresponding to the lighting bin; the radiating fins on the first lampshade shell and the radiating fins on the second lampshade shell are connected in a one-to-one correspondence mode, so that a radiating channel is formed between every two adjacent radiating fins. The two ends of each heat dissipation channel are each provided with a flow guide hole, the flow guide hole in one end is formed in the first lampshade shell, and the flow guide hole in the other end is formed in the second lampshade shell. Heat interference is reduced, the effective heat dissipation area is increased, the lighting power of the lamp can be adjusted according to actual requirements, and water and dust can be effectively prevented from being accumulated on the top of the first lampshade shell and the top of the second lampshade shell.