584 results about "Thermal bridge" patented technology

The invention relates to the technical field of energy consumption simulation, in particular to a simulation method and system based on BIM building energy consumption, and the method comprises the following steps: importing structural data in a BIM building model, recording the actual sizes and material characteristic information of building walls, windows and floors, and generating a building structure parameter table through parameter extraction and data integration. According to the method, the BIM technology and the energy consumption simulation process are utilized, the accuracy of building energy consumption prediction and the practicability of operation are remarkably improved, the building structure parameter table is constructed, the thermal bridge effect is deeply analyzed, so that thermal performance data are more accurate, dynamic adjustment of actual climate change parameters is provided in thermal load simulation, the simulation adaptability is improved, and the simulation efficiency is improved. According to the method, the consistency of an energy consumption prediction result and an actual climate condition is ensured, the simulation precision and practicability are ensured through continuous matching and iterative optimization of actual data and a simulation result, powerful data support is provided for energy efficiency management and optimization, an energy-saving target is helped to be achieved, and the environmental performance of a building is optimized.

The invention discloses a building outer wall leakage detection method and system, and belongs to the technical field of wall leakage detection. The method comprises the following steps: acquiring infrared thermal imaging, laser point cloud and multispectral imaging data, and generating a three-dimensional visual model with temperature information after environment temperature compensation correction, three-dimensional modeling and data fusion; and then extracting temperature characteristic parameters to identify an abnormal region, screening a to-be-verified region in combination with the building construction node coincidence degree and geometric parameters, and finally determining a leakage position through comparison of multispectral characteristic extraction and a preset leakage characteristic library. The system realizes full-process automatic detection by applying the method. According to the invention, temperature signal conduction limitation caused by insulation layer obstruction is broken through, the problem of misjudgment caused by a thermal bridge effect is solved through multi-source data fusion and spectral feature analysis, and the precision and reliability of leakage detection are improved.

A receptacle assembly includes a receptacle cage including cage walls forming a cavity. The cage walls include a top wall, a first side wall, and a second side wall. The receptacle cage extending between a front and a rear. The cavity includes a module channel configured to receive a pluggable module. The receptacle assembly includes a thermal transport assembly coupled to the receptacle cage. The thermal transport assembly includes a thermal bridge is received in the cavity. The thermal bridge includes a thermal interface at a bottom of the thermal bridge configured to interface with the pluggable module and remove heat from the pluggable module. The thermal bridge includes an orientation tab extending from the bottom. The orientation tab defines a keying feature for keyed mating with the pluggable module to orient the pluggable module in the module channel.

The invention relates to the technical field of building curtain walls, in particular to a splicing type building energy-saving curtain wall which comprises a curtain wall plate and a beam frame, the curtain wall plate is located on the front side of the beam frame, inserting blocks are fixed to the lower left corner and the lower right corner of the rear side of the curtain wall plate, and supporting blocks corresponding to the inserting blocks are fixed to the upper left corner and the upper right corner of the rear side of the curtain wall plate. And an upper side buckling block and a lower side buckling block are arranged on one side of the rear side of the curtain wall plate. According to the splicing type curtain wall system, accurate butt joint of the curtain wall plates in the installation process is ensured through accurate matching of the inserting blocks and the supporting blocks and butt joint design of the notches and the protruding blocks, the curtain wall plates are firmly fixed through the rotating wheels, the rotating frames, the sliding shafts and other assemblies, the heat bridge effect is reduced, the heat preservation performance is enhanced, natural ventilation is promoted through reasonable structural gaps, and the service life of the curtain wall is prolonged. The internal temperature of a building is effectively reduced, dependence on an air conditioner is reduced, passive energy saving is achieved, modular and standardized design is achieved, the construction efficiency is greatly improved, the installation process is simplified, manual adjustment and errors are reduced, and the splicing stability and shock resistance are enhanced through a locking structure.

The heat bridge breaking structure comprises a heat preservation sandwich layer located in the middle, an outer acanthus and an inner acanthus are arranged on the two sides of the heat preservation sandwich layer respectively, and the heat preservation sandwich layer is connected with the outer acanthus and the inner acanthus through a plurality of connecting assemblies for supporting the outer acanthus and the inner acanthus. According to the heat insulation bridge structure of the sandwich heat insulation external wall panel and the construction technology, the outer acanthus, the heat insulation sandwich layer and the inner acanthus are matched to form a formwork with an inner cavity and an outer cavity, concrete is poured into the cavities to form an outer acanthus wall and an inner acanthus wall, the outer acanthus and the inner acanthus are supported through the connecting assemblies, and the stable cavities are formed; the possibility that gaps between the heat preservation sandwich layers are increased or dislocation occurs due to the fact that the heat preservation sandwich layers are disturbed by concrete is reduced, and then the possibility that linear heat bridges are formed due to the fact that the effective thickness of the dislocation part heat preservation plate is reduced is reduced.

The embodiment of the invention provides a windshield and a railway vehicle, the windshield comprises two connecting frames, an inner windshield and an outer windshield, and the inner windshield and the outer windshield are arranged on the side faces of the connecting frames; the two connecting frames are connected; the cold-proof layer is laid on the inner surface of the connecting frame; the covering layer is laid on the surface of the cold-proof layer; and the covering layer is made of a non-metal material. According to the windshield and the railway vehicle provided by the embodiment of the invention, the covering layer made of the non-metal material can block the metal thermal bridge effect of the connecting frame, and the cold-proof layer arranged between the covering layer and the connecting frame can further isolate heat conduction between the connecting frame and the covering layer, so that generation of condensate water is reduced.

The invention discloses a heat preservation and energy saving type assembly modular building structure, and relates to the technical field of building energy saving. The heat-preservation and energy-saving type assembly modular building structure comprises modular wallboard units, each modular wallboard unit sequentially comprises a concrete panel, a modified polyurethane foam layer, a vacuum insulation panel layer and a graphite polystyrene board from outside to inside, all the layers are fixed through glass fiber reinforced plastic rib plates, PVC pipeline grooves are pre-buried in the rib plates, and the modular wallboard units further comprise three-section type connecting pieces, the three-section type connecting piece comprises a stainless steel outer section, a PA66 + 40% carbon fiber composite material interruption section and a glass fiber reinforced epoxy resin inner section. According to the modular wallboard, a four-layer gradient structure of the concrete panel, the PUR heat preservation layer, the VI P super heat insulation layer and the GPS inner layer is adopted, and the FRP rib plate orthogonal grid support is combined, so that the unification of efficient heat insulation and structural strength is realized; the connecting piece adopts a three-section composite design of a stainless steel outer section, a PA66 interruption section and an epoxy resin inner section, and the aerogel heat insulation layer and the spiral water guide groove are combined, so that the problems of heat bridge and leakage of a traditional connecting piece are solved.

The utility model discloses an ultra-low energy consumption external thermal insulation system of a VICP composite thermal insulation board thin plaster external wall for a building, which relates to the technical field of external thermal insulation systems of external walls and comprises a waterproof leveling layer, a cementing layer, a double-layer VICP composite thermal insulation board, a single-layer VICP composite thermal insulation board and a protective layer. The double-layer VICP composite insulation boards are adhered to the outer side of the waterproof leveling layer through the cementing layer, a heat bridge breaking anchor bolt is installed between every two adjacent double-layer VICP composite insulation boards of the base layer wall body, the cross section of each double-layer VICP composite insulation board is of a step-shaped structure, and each single-layer VICP composite insulation board is embedded in the step position of every two adjacent double-layer VICP composite insulation boards. The two VICP composite insulation boards are bonded to the outer sides of the heat bridge breaking anchor bolts through adhesives, and the protective layers are fixedly connected to the outer sides of the two VICP composite insulation boards. According to the utility model, the two kinds of VICP composite insulation boards are matched with the thermal bridge breaking anchor bolt, so that the thermal bridge effect caused by an anchor bolt hanging piece is avoided, and the requirements of high insulation property and ultra-low energy consumption are met.

The invention discloses an assembly type prefabricated concrete heat preservation and sound insulation floor slab, and relates to the technical field of prefabricated floor slabs. The assembly type prefabricated concrete heat preservation and sound insulation floor slab comprises a prefabricated bottom plate, a heat preservation layer plate is arranged on one surface of the prefabricated bottom plate, first heat preservation and sound insulation plates are arranged on the heat preservation layer plate and arranged in a state with a dead zone, and a non-dead zone of each first heat preservation and sound insulation plate is used for heat preservation and sound insulation; and the panel layer is poured on the side, close to the first heat preservation and sound insulation plate, of the prefabricated bottom plate, and the panel layer can fill the goaf. The face plate layers are in contact with the heat preservation layer plates after being poured, so that the contact area between the layer plates is increased, the contact strength between the layer plates is improved, a layer plate sandwich structure is formed, direct covering type installation of heat preservation plates in the traditional sense is improved through the structure, the connection strength between the structures is improved, and the heat preservation effect is improved. And meanwhile, the heat bridge effect is blocked by utilizing the low heat conductivity of the first heat-insulating and sound-insulating plate, so that the heat-insulating and sound-insulating effects are greatly improved.

The invention discloses a bio-based recoverable high-thermal-conductivity dynamic ordered network composite material and a preparation method thereof, and is characterized in that the material takes a bio-based multifunctional epoxy system and a carboxylic acid compound containing disulfide bonds as reaction monomers, and the reaction monomers are reacted under the conditions of high temperature and metal salt catalyzed epoxy-carboxylic acid esterification reaction to obtain the bio-based recoverable high-thermal-conductivity dynamic ordered network composite material. A dynamic ordered network structure simultaneously containing disulfide bonds and beta-hydroxyl ester bonds is constructed, and the dynamic ordered network can be used as a springboard for phonon transmission, serves as an efficient'thermal bridge ', and plays a role similar to an ordered'crystal domain', so that higher heat-conducting property is shown when heat-conducting filler is not introduced, high flexibility and intrinsic heat conduction are realized, and the service life of the material is prolonged. And the material is endowed with reprocessing and recycling characteristics. Due to the synergistic existence of carboxyl, hydroxyl generated by epoxy ring opening and metal coordination in the system, and in combination with electrostatic interaction, Van der Waals force and hydrophobic interaction, the material has the adhesion characteristic suitable for a thermal interface at the same time.

The invention discloses a vacuum insulated panel keel heat preservation system adopting anchoring and bonding connection and a construction method thereof, relates to the technical field of wall body external heat preservation, and solves the problem that the heat preservation performance is reduced due to the fact that a heat bridge effect is easily caused by existence of gaps between panels and steel embedded parts in an existing vacuum insulated panel heat preservation wall body. The connecting structure comprises a plain concrete wallboard, a pre-embedded connecting sleeve assembly, a bonding layer, a vacuum insulated panel, an orthogonal keel unit assembly, a wrap angle connecting assembly and a plastering layer, wherein the plain concrete wallboard is connected with the vacuum insulated panel and the orthogonal keel unit assembly through the pre-embedded connecting sleeve assembly and the bonding layer; the vacuum insulated panel is located in a frame formed by mutual array connection of the orthogonal keel unit assemblies; the wrap angle connecting assemblies are connected to the corners of the orthogonal keel unit assemblies. The plastering layer is located on the outer side of the vacuum heat insulation plate and the orthogonal keel unit assembly. The keel units are made of GFRP materials, gaps between plates are isolated, the heat bridge effect is reduced, and the heat preservation performance of the whole wall is effectively improved.

The invention discloses a high-toughness thermal bridge blocking material and a preparation method thereof, namely a metal fibrofelt reinforced aerogel composite material and a preparation method thereof, and belongs to the technical field of thermal insulation materials. The preparation of the metal fibrofelt reinforced aerogel composite material is realized by adopting the processes of metal fibrofelt modification, fiber prefabricated part forming, sol dipping and aging, supercritical drying, heat treatment and the like. The composite material prepared by the invention has the characteristics of light weight, low thermal conductivity, high temperature resistance, high pressure bearing capacity, high toughness and the like, and can be used as a thermal bridge blocking material in the fields of aerospace, thermal equipment and the like.

The invention provides a building integrated photovoltaic panel curtain wall installation construction method, and belongs to the technical field of photovoltaic panel curtain wall construction, and the building integrated photovoltaic panel curtain wall installation construction method comprises the steps that the surface of an embedded part is cleaned; a three-dimensional coordinate control system is used for measuring, setting out and positioning; a heat insulation cushion block is installed between the consolidation piece and the adapter piece, and foam glue is applied in a gap to insulate heat loss; mounting and adjusting the adapting piece, and firmly positioning and connecting the adapting piece and the consolidation piece; the vertical keels and the transverse keels are installed and connected in a welding mode; constructing a thermal insulation layer, and fixing the fiber felt composite rock wool board by using a special thermal bridge breaking rock wool anchor bolt; cement boards are installed and fixed, and weather-proof sealant is injected into joints; a photovoltaic curtain wall system rooting supporting steel framework is installed, and the optimal supporting structure layout is calculated through an optimization algorithm so that the stability and the bearing capacity of the whole structure can be ensured; a photovoltaic panel unit plate is installed, a photovoltaic panel circuit and a control device are connected, system debugging is carried out, and the problem that in the prior art, the optimization degree is not enough due to experience is solved.

The invention relates to a low-thermal-resistance phase change heat conduction material and a preparation method thereof, and belongs to the technical field of thermal interface materials. The phase-change-resistant heat conduction material comprises the following components in percentage by weight: 22 to 30 percent of porous BN-paraffin phase change agent, 8.5 to 10.2 percent of nano aluminum nitride, 3.5 to 4.1 percent of reactive diluent and the balance of room-temperature cured silicone rubber, according to the porous BN-paraffin phase change agent, porous BN serves as a carrier, phase change paraffin is packaged in pores, and compared with the prior art, the porous BN-paraffin phase change agent has the advantages that the pore wall of the packaged BN serves as a thermal bridge, the contact probability between the phase change agents is increased, rapid diffusion of heat in a composite material is promoted, phase change latent heat of the paraffin is fully released and conducted, and the phase change performance of the phase change agent is improved. Not only is the problem of paraffin leakage solved, but also the thermal resistance is obviously reduced.

The utility model discloses a node connecting structure of a refrigeration house roof and a photovoltaic stand column, which comprises a heat insulation fixing unit used for fixing the photovoltaic stand column and a waterproof unit arranged on the heat insulation fixing unit, and the heat insulation fixing unit comprises a mounting groove formed in the refrigeration house roof, a column foot fixed on the bottom wall of the mounting groove and a heat insulation block. The lower part of the photovoltaic stand column is fixed on the column foot; the groove wall and the bottom wall of the mounting groove are both coated with first waterproof coatings, and the upper portion of the heat insulation block extends upwards to the position above the roof and is connected with the roof. The installation grooves are dug in the roof of the refrigeration house and filled with the heat insulation blocks, the photovoltaic stand columns are wrapped with the heat insulation blocks, the heat bridge effect can be effectively avoided, and the influence of a photovoltaic system on the refrigeration house is reduced as much as possible; first waterproof coatings are arranged in the mounting grooves, and waterproof units are further arranged on the heat insulation blocks and the roof, so that the waterproof performance of the joints can be effectively guaranteed, and water leakage of the refrigeration house is avoided; as the stand columns are buried in the refrigeration house roof, waterproof parts on the refrigeration house roof can be replaced conveniently.

The invention relates to a wall thermal insulation performance detection system and method based on building design, and relates to the technical field of building energy saving and thermotechnical testing, and the system comprises a building information acquisition module, a detection module, a data processing module, a simulation analysis module, and an evaluation and feedback module. The building information acquisition module extracts wall layered structure and thermotechnical design parameters. The detection module is composed of various sensors and a thermal infrared imager. And the data processing module processes the original data. And the simulation analysis module establishes a heat conduction numerical model for the corresponding parameters, and calculates and designs wall temperature fields and heat flux distribution under different working conditions. And the evaluation and feedback module inverts the overall U value and the local thermal bridge index of the wall body to carry out difference analysis on the data result, and generates a corresponding feedback detection data report. According to the method, the BIM design information and the field detection data are seamlessly connected, and the detection result has traceability. And numerical simulation and field measurement are combined, so that the overall thermal insulation performance can be quantitatively evaluated, and the thermal bridge or thermal insulation defect can be accurately positioned.

A thermal bridge for thermally coupling an electrical component and a heat transfer device to dissipate heat from the electrical component to the heat transfer device includes upper and lower bridge assemblies includes upper and lower transfer plates, respectively. The transfer plates have sides configured to interface to thermally transfer heat from the lower bridge assembly to the upper bridge assembly. Upper ends of the upper transfer plates face and thermally couple to the heat transfer device. Lower ends of the lower transfer plates face and thermally couple to the electrical component. Upper ends of the lower transfer plates face the heat transfer device. A spring element positioned between the bridge assemblies bias against the transfer plates with an opening force.

The utility model discloses a geothermal well first open area heat-bridge-free thermal insulation pipe which comprises a plurality of heat insulation pipes connected end to end, and every two adjacent heat insulation pipes are connected through a heat-bridge-free thermal insulation coupling. The heat insulation pipe comprises an outer sleeve and an inner sleeve, a heat insulation material is filled between the inner sleeve and the outer sleeve, the end of the inner sleeve and the end of the outer sleeve are connected in a sealed mode through a double-layer sealing rubber part, the heat-bridge-free heat preservation coupling comprises a coupling outer pipe, and a broken bridge rubber layer is arranged on the inner surface of the coupling outer pipe. The top end of the broken bridge rubber layer abuts against and makes contact with the double-layer sealing rubber part located on the upper portion, the bottom end of the broken bridge rubber layer abuts against and makes contact with the double-layer sealing rubber part located on the lower portion, the top end of the coupling outer pipe is in threaded connection with the outer sleeve located on the upper portion, and the bottom end of the coupling outer pipe is in threaded connection with the outer sleeve located on the lower portion. According to the thermal-bridge-free thermal insulation pipe, the interior and the exterior are completely isolated, it is guaranteed that no thermal bridge exists on the whole structure, and the heat conductivity coefficient and the heat loss are reduced.

The invention provides an aluminum alloy precision forging forming die multi-area independent temperature control system and method, the system comprises a forming die assembly, a force thermal decoupling support base, a fluid temperature control supply station and a main control unit, the forming die assembly comprises a plurality of heat conduction inserts separated by heat insulation isolation layers; a rigid bearing loop and a dynamic thermal control loop which are parallel to each other are integrated on the force thermal decoupling supporting base, the dynamic thermal control loop drives the high-thermal-conductivity telescopic thermal bridge and the interface flexible dielectric layer to ascend and descend through a displacement actuator, and in a non-forging state, the thermal bridge supports the heat conduction insert and maintains a safety gap with the rigid bearing stand column; in the forging impact stage, the heat conduction insert moves downwards to eliminate the safety gap, the rigid bearing stand column bears the forming load, the main control unit adjusts the output force of the actuator according to temperature feedback, and the contact thermal resistance is adjusted and controlled in real time by changing the interface contact pressure. The problem that a precise temperature control assembly is difficult to bear forging impact is solved, and quick and precise response of multi-area independent heat flow is achieved.

A solid-state circuit breaker includes an airgap operating mechanism including components and electronics including semiconductors and software algorithms that control the power and can interrupt extreme currents. The SSCB further includes a housing that houses the components of the airgap operating mechanism and the electronics. The housing of the solid-state circuit breaker includes a heat sink that is part of an outer molded case such that a plastic part of the heat sink is over-molded onto a heat conducting piece that is directly connected to the semiconductors of the solid-state circuit breaker. The plastic part and the heat conducting piece are to be separated into two or more parts if the semiconductors are located at different locations on a printed circuit board such that a thermal bridge to conduct heat between the two or more parts and eventually to a plurality of fins external to the solid-state circuit breaker.

The utility model relates to a metal-plastic combined type heat-bridge-free supporting connecting piece of a suspender. The utility model aims to realize heat-bridge-free support. The organic hard material base is used for being fixed to an indoor top or a wall concrete bone layer through at least three fastening nails distributed in the circumferential direction, a center blind hole for internally fixing a nut is formed in the front face of the organic hard material base, and the nut is used for screwing and fixing a hanging rod penetrating into the center blind hole to conduct vertical or transverse bearing. The organic hard material base is provided with a nail hole allowing a nail rod of the fastening nail to penetrate through, a nail hole pit allowing a nail cap of the fastening nail to penetrate deep and an organic material cover cap sealing the nail hole pit and the nail cap. The nut is a hexagon nut or a nut provided with a peripheral extending part. The utility model has the advantages that the supporting strength can be guaranteed, a heat bridge can be blocked, the increase of cooling and heating energy consumption in a building is avoided, and the installation and use are convenient.

The invention belongs to the technical field of heat conduction materials, and discloses a high-heat-conductivity liquid metal thermal interface composite material and a preparation method thereof.The composite material comprises, by weight, 60-90 parts of gallium, 10-25 parts of indium, 0-20 parts of tin, 1-3 parts of nickel-coated carbon and 0.01-1 part of silicon carbide; the nickel-coated carbon and the silicon carbide are compounded into the liquid metal gallium indium tin, so that the high-thermal-conductivity liquid metal thermal interface composite material can be obtained; wherein the nickel-coated carbon is added, so that the heat-conducting property of the gallium-indium-tin liquid metal can be remarkably improved, because on one hand, a nickel layer is used as a thermal bridge for connecting a carbon material and the liquid metal, the interface thermal resistance can be reduced, the wettability of nickel and gallium-indium-tin is good, and on the other hand, the viscosity of gallium-indium-tin can be improved to a certain extent; therefore, random flowing of the liquid metal is inhibited; and silicon carbide does not react with gallium indium tin at normal temperature, so that the internal friction resistance of the liquid metal can be increased, and the silicon carbide can be embedded into the interface of the liquid metal and the substrate, thereby improving the affinity of the material.

The invention belongs to the technical field of building protection walls, and particularly relates to a building outer wall heat preservation and fire prevention integrated reverse construction method which comprises the following steps that S1, an embedded block is reserved; s2, an L-shaped corner brace supporting assembly and a picking and hanging assembly are installed; s3, an inner supporting cushion block is installed, and a drill hole is drilled; s4, a fireproof plate is installed and reinforced; s5, pouring polyurethane foaming thermal insulation slurry; s6, dismantling and recycling; and S7, outer wall facing layer construction. The thermal insulation fireproof performance of the building outer wall can be improved, the construction process is shortened, the construction adaptability to complex modeling wall surfaces and super high-rise buildings is improved, and the technical problems that in a traditional technology, a thermal bridge is remarkable, the working procedure is tedious, and anchoring is not firm are solved.

The utility model discloses an aluminum cellular board curtain wall, and relates to the technical field of curtain wall boards. The aluminum honeycomb panel comprises an aluminum honeycomb panel body, a corrosion-resistant layer is adhered to one side wall of the aluminum honeycomb panel body in a stacked mode, a waterproof layer is adhered to the surface of the corrosion-resistant layer in a stacked mode, and an aluminum single plate is adhered to the other side wall of the aluminum honeycomb panel body in a stacked mode. According to the aluminum honeycomb panel, moisture and corrosive substances in external air are prevented from being in direct contact with the aluminum honeycomb panel through the aluminum veneer and the corrosion-resistant layer of the aluminum honeycomb panel surface layer, the corrosion-resistant layer further plays a role in isolation and protection, the service life of the aluminum honeycomb panel is prolonged, and the aluminum veneer and the waterproof layer form a waterproof isolation layer, so that the service life of the aluminum honeycomb panel is prolonged. The aluminum honeycomb plate is prevented from being in direct contact with moisture, moisture or corrosive substances, the heat bridge effect is restrained through the clamping effect of the aluminum honeycomb plate, the corrosion-resistant layer, the waterproof layer and the aluminum single plate through the U-shaped metal edge sealing strip, the heat insulation performance is improved, and the moisture, the moisture or the corrosive substances can be prevented from being in contact with curtain wall materials through the edges of the aluminum honeycomb plate, the corrosion-resistant layer, the waterproof layer and the aluminum single plate.

The present application relates to the field of building, specifically to a composite panel-type tie member and a shear performance calculation method; comprising a steel core layer and outer cover layers located on both sides of the steel core layer to clamp and position the steel core layer; the outer cover layers are made of GFRP material, and the sizes of the two outer cover layers correspond; the size of the steel core layer is smaller than that of the outer cover layer, and the steel core layer and the outer cover layer have an equal proportion corresponding relationship; after the centers of the steel core layer and the outer cover layer are aligned, the gap area between the edges of the outer cover layers and the edges of the steel core layer is filled with bonding material. The tie member has high shear strength and stiffness, and effectively reduces the influence of wallboard thermal bridge effect.

The invention relates to an automatic indoor air pressure regulating valve, and belongs to the technical field of building ventilation equipment. The device is composed of a valve body made of a thermal resistance material, an air pressure driving assembly, a spring pre-compression regulator, a filtering module and a selectable sterilizing module. The device is technically characterized in that the inner body of the valve is automatically controlled to slide to open and close through air pressure difference to adapt to ventilation quantity. The valve body is made of high-heat-resistance high-molecular materials, and the heat bridge effect of the regulating valve is avoided. And the continuous adjustment of the opening and closing threshold within the range of 0.1-50Pa is realized by the threaded knob type adjuster. A UVC lamp tube (253.7 nm) and an ozone generator (0.05-0.1 ppm) can be selectively integrated, and three sterilization modes are supported; and the requirement for the air volume of 100-1000 m / h is met. The system is suitable for environments with ventilation requirements such as residences, factories, storage, medical treatment and laboratories, is particularly suitable for environments with energy-saving and heat-insulating requirements, and has self-adaptability, low-noise and efficient air treatment capacity.

The invention relates to the technical field of wall construction, and discloses a technological construction method of a metal facing and thermal insulation layer composite wall, which comprises the following steps: selecting a thermal insulation layer material: adopting a composite thermal insulation material with low thermal conductivity, good waterproofness and higher toughness, such as high-performance polyurethane foam or polystyrene foam, so that the thermal insulation performance is better; by optimizing the material of the thermal insulation layer and selecting the metal veneer, the thermal insulation performance of the wall body is greatly improved, the thermal bridge effect can be effectively reduced, the temperature stability of a building in different seasons is ensured, and therefore the energy consumption of an air conditioner and heating is reduced, and the energy-saving effect is achieved. And secondly, a metal-contact-free design and a floating connection mode are adopted, so that the problems of thermal bridge and structural deformation are effectively eliminated, and the overall thermal insulation performance and crack resistance of the wall body are improved. In addition, due to the built-in damp-proof layer and the waterproof design, the heat preservation layer is prevented from being affected with damp, the service life of the wall is prolonged, and the risks of corrosion and mildew are reduced.

The present invention provides a building exterior wall insulation device with high thermal insulation effect. The building exterior wall insulation device of this embodiment includes an inner insulation layer and an outer insulation layer connected to each other, the inner insulation layer includes a first insulation unit, the outer insulation layer includes a second insulation unit, the second insulation unit covers the space between two adjacent first insulation units, and the space between two adjacent second insulation units is opposite to the first insulation unit. This embodiment adopts a relative arrangement of the first insulation unit and the second insulation unit, which increases the interface thermal resistance between the first insulation unit and the second insulation unit, reduces thermal conductivity, and has a high thermal insulation effect. The first insulation unit and the second insulation unit are staggered, which reduces the heat transfer between the inside and outside of the building exterior wall, effectively reduces the dissipation of indoor heat and the entry of outdoor cold air, reduces the thermal bridge effect between the gaps, and improves the thermal insulation effect.

The invention discloses a seasonal frost heaving thermal insulation control pavement structure, and belongs to the field of road engineering. The structure comprises an asphalt or concrete surface layer (1), an upper cement stabilized macadam layer (2), an upper sand cushion layer (3), an extruded sheet thermal insulation layer (4), a lower sand cushion layer (5) and a lower cement stabilized macadam layer (6), the extruded sheet thermal insulation layer (4) is a complete thermal insulation layer formed by splicing a plurality of extruded sheet units through mortise and tenon joint structures (7). Through the extruded sheet thermal insulation layer in mortise and tenon connection, heat transfer of the upper layer and the lower layer can be effectively blocked, displacement between the plates is prevented, and local frost heaving caused by a plate joint thermal bridge effect is avoided, so that the overall stability and durability of a pavement structure are remarkably improved, and the prevention and treatment requirements of seasonal frost heaving of pavements in regions with different freezing depths can be met.

The application relates to the technical field of stop valves, and discloses an ultralow-temperature stop valve, which comprises a valve seat and a valve body, the valve seat is arranged on the valve body, a valve rod for opening and closing the valve seat is arranged in the valve body, a packing part is arranged on the valve body, the packing part is used for plugging a gap between the valve body and the valve rod, a heat preservation sleeve is arranged on the valve body, a baffle is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, and the heat preservation sleeve is located on the outside of the packing part. The heat preservation sleeve is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, the baffle limits the movement of the heat preservation sleeve, the heat preservation sleeve can stably preserve the temperature of the packing part, the packing part is not prone to thermal bridge effect, and the condition that the packing part can quickly adsorb cold air is reduced.