7results about How to "Avoid heat conduction" patented technology

This application discloses a heat-insulating and high-temperature resistant PPR composite pipe and its preparation method. The PPR composite pipe includes an inner layer, a middle layer, and an outer layer. The inner layer, by weight, includes the following components: 80-90 parts of PP-RCT, 1-3 parts of boron-nitrogen co-doped graphene aerogel, 0.5-1.5 parts of antioxidant, 3-8 parts of boron nitride, 1-3 parts of polyphthalamide, and 0.5-2 parts of dispersant. The middle layer includes PP-RCT, chopped glass fiber, maleic anhydride-grafted polypropylene, and ethylene-vinyl alcohol copolymer. The outer layer includes PP-RCT and an ultraviolet absorber. This PPR composite pipe has excellent heat insulation and high-temperature resistance properties.

The utility model provides a kind of aerogel infusion glass fibre thermal insulation decorative board assembly, it includes infusion thermal insulation core layer, inner side support plate layer, outer side support plate layer, cover decorative surface shell layer and plug-in positioning end, and the infusion thermal insulation core layer of the thermal insulation decorative board assembly is formed by infusion of aerogel in glass fibre felt body, aerogel has very low thermal conductivity, and microstructure is composed of nanometer scale pore, can effectively prevent heat conduction, realize good heat insulation effect, provide efficient thermal insulation performance for building, by setting inner side support plate layer and outer side support plate layer, the inner and outer sides of infusion thermal insulation core layer are supported and strengthened respectively, the structural stability of the whole thermal insulation decorative board assembly is enhanced, the setting of plug-in positioning end makes that thermal insulation decorative board assembly can accurate positioning, and with wall body joint, adjacent thermal insulation decorative board assembly can also be sequentially spliced, improve construction efficiency and installation quality.

This application discloses a combined polyether, a polyurethane composition, a polyurethane foam, and a refrigeration device. The combined polyether comprises a polyether polyol and a filler, wherein the filler comprises an epoxy-based cage-like polysilsesquioxane; wherein at least one organic side chain attached to the silicon atom of the epoxy-based cage-like polysilsesquioxane contains an epoxy group, and at least one epoxy group is located at the end of the organic side chain. The combined polyether provided in this application, by adding an epoxy-based cage-like polysilsesquioxane as a filler, achieves molecular-level dispersion by forming covalent bonds with the hydroxyl groups of the polyether polyol and the -NCO groups of the isocyanate, due to the epoxy active groups contained in this filler. This prevents the thermally conductive filler from agglomerating and migrating. Furthermore, the cage-like structure of the epoxy-based cage-like polysilsesquioxane can effectively capture gas molecules inside the polyurethane foam, inhibiting gas heat conduction and significantly reducing the thermal conductivity of the polyurethane foam at low temperatures.

The utility model relates to door lock cylinder technical field especially, it is a kind of door lock cylinder, solve the problem that multiple keys need additional space to store in prior art, need to replace lock to prevent stranger to open lock after losing key.A kind of door lock cylinder, including door panel, the surface of door panel is equipped with lock cylinder by mounting mechanism, the surface of lock cylinder is equipped with accommodating groove, the inside of accommodating groove is slidably connected with several separate rings, the inside of separate ring is equipped with locking mechanism, the top of lock cylinder is fixedly connected with two sliding blocks, one end of lock cylinder is rotatably connected with ring, the other end of lock cylinder is rotatably connected with bottom ring, the surface of ring is equipped with key.The utility model can open multiple door locks using a key, save the space where key is placed, and when key is lost, the position of separate ring in lock cylinder can be changed to make previous key unable to open new door, additional door lock is not needed, prevent lock cylinder internal high temperature deformation to cause door unable to open.

The utility model relates to medical detection device technical field especially for a kind of trace PCR reaction auxiliary device, including tapered tube core, baffle, connecting rod, ring stand, threaded connection seat, screw rod structure, lower pressing part, fixed plate, resistance pole and PCR reaction tube;The utility model is used in cooperation with PCR reaction tube, distribute liquid in PCR reaction system in the vicinity of pipe wall, increase the conduction efficiency with PCR instrument heat module, promote reaction speed, avoid the process of liquid internal heat conduction simultaneously, improve the uniformity of reaction system, improve PCR reaction efficiency, and the volume of overall reaction system can be reduced to 1-5 microliters from 20-50 microliters, greatly save the dosage of reaction reagent and the requirement to sample amount, and the device can be adapted to the general ordinary PCR reaction tube in market, need not add new instrument and consumables when using the device, and additional cost will not be increased.

The present application relates to a kind of wide temperature range temperature parameter black box tester, belong to industrial measurement and control technical field.The multistage temperature tester protection structure is used, from outside to inside in turn includes fiber heat insulation layer, nano micropore heat insulation layer, phase change heat insulation layer, inner layer high reflection heat insulation layer and vacuum heat insulation layer;Vacuum heat insulation layer is vacuum cavity, and the outer side wall surface of which is equipped with heating sheet array and closed loop feedback control system, for active heat compensation under low temperature environment;Data instant transmission system uses high-temperature-resistant antenna to realize wireless data transmission and time synchronization;Damping and sealing integrated system includes hierarchical damping damping structure and sealing gasket structure.The present application realizes stable, accurate temperature measurement in-190 ℃ to 1300 ℃ wide temperature range, has real-time data transmission, anti-vibration and sealing protection ability, significantly improves the reliability and measurement accuracy of equipment in harsh environment.

The utility model belongs to battery technical field discloses a kind of battery box, battery pack and electric device, the battery box includes box body and first cold plate, first cold plate is along transverse arrangement and box body is divided into upper battery cavity and lower battery cavity, upper battery cavity and lower battery cavity all have multiple battery group placement site;Among them, reinforcing beam is arranged in lower battery cavity, and the upper end surface of reinforcing beam and the lower surface of first cold plate have interval. Through the technical scheme provided in the application, the heat exchange problem between the upper battery cavity and the lower battery cavity in the related art can be at least solved.