9results about How to "Increase cooling power" patented technology

The invention discloses a design method of a multi-stage thermoelectric cooler adaptive to a multi-component bismuth telluride temperature zone. The design method comprises the following steps: preparing bismuth telluride materials with various components and different thermoelectric properties; testing the change relation of the thermoelectric parameters of the multiple groups of bismuth telluride materials in a near room temperature range along with the temperature; based on a test result, screening the bismuth telluride material with the highest thermoelectric figure of merit in different temperature zones, drawing a curve of thermoelectric parameters of the bismuth telluride material changing along with the temperature, and fitting to obtain a high-order term expression taking the temperature as a variable; setting an initial value of the logarithm and an initial value of the grain size of each layer of element of the multistage thermoelectric refrigerating unit, and substituting the obtained fitting expression into a heat balance equation set of the multistage thermoelectric refrigerating unit according to a temperature zone for analysis; and solving a heat balance equation set by iterating the logarithm and the grain size of each layer of element to obtain an optimal design parameter and finish the design. By means of the method, structural optimization of the multistage thermoelectric cooler can be achieved, material temperature zone adaptation and structural parameter collaborative optimization are achieved, and the refrigeration temperature difference and the refrigeration power are remarkably improved.

This invention relates to a relay and an automatic circuit protection method using the relay. The relay includes a housing, conductive steps disposed on the inner walls of the left and right sides of the housing, and a stepped conductive bridge that can dynamically fit with the conductive steps. External cables pass through the housing and are electrically connected to the conductive steps. A piston push rod device drives the conductive bridge to rise and fall, connecting or disconnecting it from the conductive steps. The piston push rod device is driven by vapor generated by the sublimation of an easily sublimable substance. This relay and the automatic high-voltage circuit protection method using the relay are not only reusable, but also have a simple and stable structure, low manufacturing and assembly costs, stable operation, long service life, and can reliably achieve power cut-off in a fire.

The utility model belongs to the technical field of heat energy storage and heat supply control, provide a new type of variable interval serpentine plate type phase change cold accumulator structure, including the cold accumulator shell, the serpentine series connection pipe subassembly including the connecting sleeve subassembly between the two opposite side walls of cold accumulator shell and a plurality of setting in the mouth type pipe plate of cold accumulator shell, a plurality of mouth type pipe plates are in parallel, and the connecting sleeve subassembly is used for connecting a plurality of mouth type pipe plates in proper order to make a plurality of mouth type pipe plates form series intercommunication, and the connecting sleeve subassembly is communicated with fluid inlet and fluid outlet, and along the flow direction of fluid, the interval between two adjacent mouth type pipe plates gradually reduces, and the interval between two adjacent mouth type pipe plates is filled with phase change material, and the phase change material is used for carrying out heat exchange with the fluid in the mouth type pipe plate. The utility model discloses variable interval serpentine plate type phase change cold accumulator structure little flow resistance, high heat transfer efficiency, compact structure is applicable to the high power density demand scene.

The utility model discloses a special-shaped backflow channel temperature equalizing plate and a radiator, the temperature equalizing plate comprises an upper body, a lower body, a first capillary structure, a second capillary structure and a backflow channel body, the first capillary structure is located on the inner surface of the upper body, the second capillary structure is located on the inner surface of the lower body, and the backflow channel body is located on the lower body. The upper body and the lower body form a closed cavity, and the backflow channel body is provided with a plurality of micro-channels used for backflow of working media. According to the special-shaped backflow channel temperature uniformizing plate and the radiator, the backflow channel body is additionally arranged, and the plurality of micro-channels used for backflow of the working media are arranged on the backflow channel body; the liquid working medium is helped to flow back to the lower body, the multiple micro-channels are additionally arranged, the backflow liquid working medium collected by the micro-channels is more, the backflow speed is higher, and the heat dissipation power and the temperature uniformizing performance of the temperature uniformizing plate can be remarkably improved.

This invention provides an intelligent wind turbine generator set with a liquid cooling system, including a tower, a nacelle mounted on top of the tower, and a generator body and converter housed within the nacelle. It also includes a liquid cooling circulation system and a control unit. The liquid cooling circulation system comprises coolant, a pump station, a radiator, and cooling channels arranged on the surfaces of the generator body and converter. This application effectively reduces hot spot temperatures and improves heat dissipation efficiency by tightly adhering the cooling channels to the generator and converter surfaces, combined with real-time adjustment of the coolant flow rate by the control unit. For example, the cooling channels are made of thermally conductive material and adhered to the stator windings and power modules, ensuring rapid heat conduction. The coordinated operation of the pump station and flow control valve optimizes coolant circulation energy consumption, while the combined design of the radiator and fan enhances heat dissipation. The overall system reduces energy consumption while extending the service life of key components.

This utility model relates to the field of radiator technology, and more particularly to a heat dissipation device with graded heat conduction. The heat dissipation device includes a primary heat conduction component, multiple sets of secondary heat conduction components, multiple sets of tertiary heat conduction components, and multiple sets of heat dissipation components. The secondary heat conduction components abut against the primary heat conduction components, and the tertiary heat conduction components are arranged one-to-one with the secondary heat conduction components. The corresponding tertiary heat conduction components and secondary heat conduction components abut against each other on opposite sides along a first direction. The tertiary heat conduction components and secondary heat conduction components are arranged sequentially along a second direction. Each heat dissipation component has a first receiving groove arranged along the second direction, in which the secondary and tertiary heat conduction components are located. Each set of secondary heat conduction components contacts two adjacent sets of heat dissipation components on two sides along the first direction, and each set of tertiary heat conduction components contacts two adjacent sets of heat dissipation components on two sides along the first direction. This heat dissipation device improves heat dissipation power and expands its application range.

The invention provides a graphene phase change material polymerization packaged integrated heat dissipation device and a preparation method thereof, and the preparation method comprises the following steps: mixing a graphene material with a phase change material to prepare a graphene phase change matrix; processing in the graphene phase change matrix to form a micro-channel structure; the method comprises the following steps: depositing a polyamide acid precursor on the surface of a graphene phase change substrate to obtain a polyamide acid precursor film, then carrying out thermal imidization treatment to obtain a continuous polyimide polymer packaging film, then injecting a cooling liquid into a micro-channel of the heat dissipation device, and carrying out packaging to obtain the integrated heat dissipation device. The graphene phase change matrix improves the heat conductivity coefficient and realizes light weight, so that the requirements of high efficiency and low-weight heat dissipation are met; the micro-channel structure and the phase change material function cooperate to realize integration of energy storage, heat conduction and heat dissipation, and the heat dissipation power is improved; an ultrathin polyimide packaging film is formed through polymerization packaging, and zero-wrapping-edge insulation packaging of a complex structure is achieved.

This invention provides a dilution refrigeration machine, relating to the technical field of dilution refrigeration machines, comprising a mixing chamber, an evaporation section, a first pump set, and a second pump set. The mixing chamber contains... 3 He- 4 The mixture is subjected to phase separation into a concentrated phase and a diluted phase at a first temperature. The evaporation section is connected to the mixing chamber and contains the diluted phase, providing a portion of the diluted phase for further processing. 3 He evaporates into the gas phase. 3 He. The first pump unit will pump the gas phase... 3 He continuously extracts, causing the mixture in the mixing chamber to... 3 He is added to the evaporation section along the concentration gradient for continuous evaporation, with the concentrated phase corresponding to the dilution phase. 3 The concentration of He decreases, compensating for the decrease in the dilution phase. 3 He simultaneously absorbs heat from the surroundings, and the first pump unit extracts the gas phase. 3 After the he condenses into a concentrated phase, it is replenished to the mixing chamber for cyclic refrigeration. The second pump unit continuously draws out a portion of the evaporator section. 4 He was sent back to the mixing chamber to be incorporated into the dilution phase, further reducing its concentration. 3 He concentration increases in the concentrated phase 3 The amount of He that migrates into the diluted phase.

The application belongs to the technical field of plate-fin heat exchanger, and discloses a variable-spacing plate-fin energy-saving heat exchanger, which comprises a plurality of heat exchange boxes arranged between two pressing plates, a pipeline one and a pipeline two for supplying cooled medium and cooling medium respectively, the heat exchange box comprises a plurality of plate fins arranged at equal intervals in the interior, and further comprises an outer shell spliced by a cover plate, a channel steel edge and a bottom plate, both ends of the plate fin are provided with end sealing plates, and the end sealing plates of two adjacent plate fins are staggered and connected to form a closed rectangular water channel. The plate fin can slide horizontally in the heat exchange box, both ends of the graphite sealing strip are provided with end sealing plates which are staggered and connected to form a closed water channel when sliding horizontally. When the cooling power of the heat exchanger in the cooling system is improved, the injection pressure of the pipeline one is increased, and the rectangular water channel is expanded to the two sides due to the medium pressure to widen the water channel.