51results about How to "Increase heat transfer resistance" patented technology

The invention discloses heat-preservation sound-proof low-density foamed concrete. The heat-preservation sound-proof low-density foamed concrete is characterized by being prepared from, by weight, 40-100 parts of cement, 5-40 parts of carbide slags, 5-40 parts of active powder, 1-20 parts of foaming agents, 0.1-8 parts of foam stabilizers, 0-8 parts of water reducing agents, 0-8 parts of coagulation accelerator, 0-25 parts of waterproof agents, 0.1-5 parts of anti-cracking agents and 25-150 parts of water, and the foamed concrete is prepared from the materials through mixing, foam molding and maintenance. The heat-preservation sound-proof low-density foamed concrete has the advantages of being low in dry density, low in heat conductivity coefficient, high in strength, wide in raw material source, low in cost, simple in preparation technology, convenient to prefabricate in factories or pour on site and the like; the heat-preservation sound-proof low-density foamed concrete is suitable for building exterior wall heat-preservation engineering, roof heat-preservation engineering, floor heating heat-preservation engineering, composite heat-preservation wall engineering, backfilling engineering, retaining wall slab engineering and the like.

The invention discloses general purpose Portland cement based ultra-light physical foamed concrete which is characterized by being prepared by mixing, forming and maintaining the following components in percentage by weight: 20-70% of general purpose Portland cement, 0-40% of a type A admixture or/and 0-40% of a type B admixture, 0.5-4% of a type C additive, 0.3-2% of a foaming agent, 0-1% of a water reducing agent, 0-4% of fibers and 25-60% of water. The general purpose Portland cement based ultra-light physical foamed concrete disclosed by the invention has the characteristics of ultra-low dry density, low thermal conductivity, relatively high strength, wide raw material source, low cost, simple preparation process, easy maintenance process selection and the like, is suitable to serve as an earthquake-proof and energy-absorbing material, a lightweight cushion course and a catalyst carrier material in a thermal insulation project, a floor heating project and a back filling project, and is particularly suitable for a building exterior wall external thermal insulation system, a roof thermal insulation system, a composite thermal insulation wall body and a buffer energy absorbing system.

The invention relates to a stable gas membrane used for removing, recovering, and gathering ammonia or organic amine from dosage liquor or wastewater. The gas membrane comprises a membrane shell, hollow fibrous membranes (A) and hollow fibrous membranes (B). A cavity is provided in the middle of the membrane shell. An inlet and an outlet are respectively arranged on each of the two ends of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are positioned in the cavity of the membrane shell. A shell pass outlet communicating with the atmosphere is arranged on a lower end of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are uniformly arranged in the membrane shell with regular spaces. Dosage liquor or wastewater containing ammonia or organic amine is delivered through the tube pass of the hollow fibrous membranes (A), and absorption liquid is delivered through the tube pass of the hollow fibrous membranes(B). With the gas membrane provided by the invention, problems of traditional gas membranes of leakage and low service life are overcome; dilution of a byproduct ammonium salt solution caused by a concomitant osmotic distillation phenomenon can be effectively inhibited; ammonium salt concentration of the byproduct ammonium salt solution can be increased from 10-20% to 20-40%; mass transfer coefficient at the acid absorption liquid side can be substantially improved; the ammonia removing efficiency is high; the ammonia removing effect is stable for a long-term; and the service life of membranesets can be improved by 3-10 times than common gas membranes.

The invention discloses a 3D printer spray head with an adjustable nozzle caliber. The 3D printer spray head comprises a rotor and a nozzle assembly; the rotor comprises a heat storage block, a material storage pipe, a throat pipe, a heat insulation gasket, screws and nuts; the nozzle assembly comprises a first gasket, nozzle surrounding sheets, a second gasket, a guide plate and a control plate.The nozzle surrounding sheets are matched with one another to form a polygonal nozzle flow channel, and a guide groove for guiding the movement of the nozzle surrounding sheets is arranged on the guide plate to guide the movement direction of the nozzle surrounding sheets. The control panel is matched with the guide plate, and the relative rotation between the control panel and the guide plate canchange the size of the side length of the polygon enclosed by the nozzle surrounding sheets, thus realizing an adjustable size of the printing nozzle circulation area. The heat storage block is connected with the material storage pipe through screws and nuts, so that the heat transfer resistance between the heat storage block and the material storage pipe can be effectively improved.

The invention discloses an excavation tunnel heat-insulation flow-dividing heat discharge cooling method. In the method, a closed heat insulation board with a shape similar to the shape of the peripheral wall of a tunnel is disposed at a distance from the peripheral wall of the tunnel and along the excavation direction; the heat insulation board divides the air flow inside the tunnel into a main flow channel air flow in the middle of the tunnel and an auxiliary flow channel air flow between the heat insulation board and the peripheral wall surrounding rock of the tunnel; in the main flow channel is disposed an air duct connected with an auxiliary fan; partial harmful gas/dust and heat/moisture of a heading face and heat/moisture of the tunnel surrounding rock are discharged via the auxiliary flow channel; and convection heat transfer and moisture exchange between surrounding air of the tunnel surrounding rock and air in the middle of the tunnel are blocked by the heat insulation board. The inventive method increases heat resistance of heat transfer of the tunnel peripheral wall, reduces the quantity of heat transferred to the middle of the tunnel from the tunnel surrounding rock, blocks convection heat transfer and moisture exchange between surrounding air of the tunnel surrounding rock and air in the middle of the tunnel, and has the characteristics of simple structure, convenient maintenance, economical operation and remarkable cooling efficiency, compared with other cooling methods.

The production method of coated granular phytase includes the following steps: uniformly mixing phytase and stabilizing agent, slowly adding fully-dissolved binder at the same time of shearing materials, stirring, cutting, kneading and granulating in the granulating machine to obtain granular material, boiling and drying, then using spray method to coat the granular phytase and screening so as to obtain the invented spherical coated granular phytase.

The invention relates to a heat pump water heater and belongs to the technical field of water heaters. The water heater comprises a heat pump system which consists of a compressor, a condenser, a throttling element, and an evaporator. The condenser is arranged on a water tank of the water heater to form a heat exchange structure; and the condenser consists of at least two sections of heat exchange tubes which are connected in series along the flow direction of a refrigerant, and the flow area of the front section of the heat exchange tube is more than that of the rear section of the heat exchange tube. Because the heat exchange capacity of the condenser is effectively improved, the heat pump performance can be effectively improved when the heat exchange area is the same; the heat exchange area and weight needed by the condenser are greatly reduced on the premise of guaranteeing good operating effect of the heat pump; the materials and processing cost thereof are effectively saved; and the structural dimension is reduced. Therefore, the reliability is improved; and due to the simpleness and practicality of the structure and technology, the cost is reduced, and the market competitiveness of the products is improved.

The invention relates to the field of ice storage, in particular to an ice-storage air conditioner and an ice-storage method. Ice making and ice stripping are carried out in a circulation manner, and therefore energy efficiency and the icing rate of a system can be improved. The defects that in the prior art, a coil pipe is adopted to heat exchange, along with increasing of the thickness of an ice layer, the heat transfer resistance is increased, and consequently, the system energy efficiency is low, and the icing rate is small are overcome. The ice-storage air conditioner comprises an ice-storage barrel and a heat exchanger; the heat exchanger is placed in the ice-storage barrel, and comprises a shell and a refrigerant runner arranged in the shell; the shell comprises a heat exchange face and a non-heat-exchange face; the face opposite to the bottom of the ice-storage barrel is the non-heat-exchange face; when refrigerants subject to throttling down and decompression flow through the refrigerant runner forwards, water in contact with the heat exchange face is cooled and iced; when the refrigerants flow through the refrigerant runner in a reverse manner, ice in contact with the heat exchange face is partly molten, and the ice is separated from the heat exchange face upwards under the buoyancy effect.

The invention provides a self-insulation composite concrete self-supporting building block. The building block is characterized in that: the building block comprises a pair of building block walls respectively positioned on the inner side and the outer side, a pair of building block ribs respectively positioned on the left side edge and the right side edge of the two building block walls, and a high-efficiency heat-insulating material filled in a hollow chamber formed by the building block walls and the building block ribs; the building block walls and the building block ribs are produced from two different concrete materials, wherein the thermal conductivity lambda L' of the concrete material used for producing the building block ribs is smaller than the thermal conductivity of the concrete material used for producing the building block walls. With the building block provided by the invention, thermal transmission capacity of building block rib thermal bridges can be weakened, self-insulation capacity of the building block can be improved, and various material performances of common concrete and shock resistance of the building block can be reserved.

A spacer for insulating glass panes comprises a profile body made using a first plastics material, which has a substantially U-shaped cross section with first and second side walls arranged in parallel, each having a free end and an inner wall extending between the first and the second side wall, and a vapor diffusion barrier made of a poorly heat conducting material, extending from the free end of the first side wall to the free end of the second side wall, wherein the vapor diffusion barrier is arranged substantially in parallel to and spaced apart from the inner wall. The profile body together with the vapor diffusion barrier encloses a cavity of the spacer which is optionally configured to accommodate a desiccant.

The present invention discloses a nano fluid solar window-type collector. It has several nano fluid solar window bodies, the liquid outlet of nano fluid solar window body is successively connected with heat exchange component and water inlet pipe of circulating pump, the liquid inlet of several nano fluid solar window bodies is connected with water outlet pipe of circulating pump, the circulating pump is connected with by-pass regulation valve; The nano fluid solar window body possesses upper frame, lower frame, double-layer glass and side frames, the upper side face of upper frame has liquid inlet and air hole, the upper side face of lower frame has micropore, the lower side face of lower frame has liquid outlet; the heat exchange component is formed from nano fluid header and heat exchange water tank.

A cooling circuit for a motor vehicle has an engine cooling portion (16) for cooling a motor vehicle engine, a battery cooling portion (14) for cooling a motor vehicle battery, and a cooling fluid flowing through both the engine cooling portion (16) and the battery cooling portion (14). The cooling fluid is electrically non-conductive and is in direct contact with electrical contact surfaces of the motor vehicle battery.

The invention discloses a molten-metal-cladding hot isostatic pressing preparation method for a particle-reinforced metal-matrix composite, and aims at solving the problems that at present, when the particle-reinforce metal-matrix composite is prepared through the hot isostatic pressing process in the powder metallurgic method, a sheath good in leakproofness needs to be manufactured, procedures are complicated, generally, only blanks simple in shape can be prepared, the production efficiency is limited, strong light, smoke and the like can be generated in the welding process and environment friendliness is poor. The molten-metal-cladding hot isostatic pressing preparation method includes the four key steps of raw material mixing, cold isostatic pressing forming, assembling and hot isostatic pressing. As a new hot isostatic pressing method, the molten-metal-cladding hot isostatic pressing preparation method can effectively solve the problem that sheath sealing and welding need to be conducted in a traditional method, the production process is effectively simplified, the production efficiency is improved, and the bottleneck of the production efficiency is broken through. Meanwhile, the production energy consumption and cost can be effectively reduced while the material quality is ensured, and the molten-metal-cladding hot isostatic pressing preparation method is friendly to the environment, has high application value and is worthy of large-scale application and popularization.

The invention discloses an insulated brick and manufacturing technique, which comprises the following parts: 10%-30% ceramic grain slag, 47%-67% shale powder with SiO2, fe2O3 and Al2O3, 5% coal dust and 18% water. The manufacturing technique comprises the following steps: 1. breaking shale grain; placing the shale grain into rotary kiln to preheat; bulking the grain under high temperature; sintering into ceramic grain slag; 2. grinding ceramic grain slag, shale and coal dust into powder; 3. stirring ceramic grain slag, shale, coal dust and water into blender according to certain proportion; 4. pouring brick mud into brick making machine to make brick blank; 5. piling brick blank into three-core arc-straight channel to sinter; 6. cooling; obtaining the product.

The invention discloses a probe structure of an infrared ear thermometer. The probe structure is designed by using heat transfer principles to enable a thermistor to truly and rapidly reflect the actual temperature of the cold jointing end of a thermopile; therefore, the measurement error of the infrared ear thermometer can be minimized in the environment with varying temperature.

The invention relates to an aluminum alloy profile structure and a car body enclosure structure. The car body enclosure structure includes the aluminum alloy profile structure, the aluminum alloy profile structure includes a body and a heat insulator; the body includes a first surface layer and a second surface layer oppositely arranged, and the first surface A plurality of ribs are arranged at intervals between the layer and the second surface layer, and two adjacent ribs form a cavity with the first surface layer and the second surface layer, and the cavity has an open end ; The heat insulator is arranged on the inner side wall of the cavity. The aluminum alloy profile structure and the vehicle body enclosure structure can effectively reduce the heat exchange efficiency in the aluminum alloy profile cavity, thereby improving the overall heat insulation performance of the vehicle body enclosure structure, thereby reducing the energy consumption of the vehicle body air conditioning system. electricity.

The invention discloses a spiral flat pipe type buried pipe and belongs to the technical field of ground source heat pumps. The spiral flat pipe type buried pipe comprises a buried pipe body. The two ends of the buried pipe body in the length direction are straight pipe sections, the middle of the buried pipe body is a bent pipe section which is of a spiral rotary shape, and the section of the bent pipe section is oval. Protruding heat exchange ribs are arranged in the buried pipe body and attached to the inner wall of the buried pipe body. According to the spiral flat pipe type buried pipe, the heat exchange ribs capable of improving the fluid turbulence effect are arranged in the pipe and meanwhile the contact area between the pipe and water flow is increased, so that the heat transfer area is increased and the heat transfer effect is further improved.

The invention discloses a multifunctional energy-saving and environment-friendly wall for a building, which comprises a base body, a leveling layer, a bonding layer and a facing brick which are sequentially distributed from inside to outside, and further comprises a heat preservation and noise reduction mechanism, a moisture-proof mechanism and an alarm mechanism which are positioned in the bonding layer, the heat preservation and noise reduction mechanism comprises a plurality of tiny bubble holes located in the bonding layer, the tiny bubble holes are unevenly distributed in the bonding layer, the arrangement of the tiny bubble holes can greatly increase heat transfer resistance and absorb sound energy, the effect of improving heat preservation and heat insulation of a building body and the effect of absorbing sound and reducing noise are achieved, and the arrangement of reinforcing ribs can improve the heat preservation and heat insulation of the building body. The pressure resistance and toughness of the wall body can be improved, and the problems of wall body surface cracking, bulging and falling caused by thermal expansion and cold contraction of a bonding layer due to large day and night temperature difference of a building body in multiple rounds of winter and summer are solved; and the waterproof breathable film and the energy storage liquid are arranged, so that the problems of water resistance, moisture resistance, dehumidification and drying of the wall are solved.

The invention discloses a heat insulation protection device for protecting special electronic products from extreme high-temperature environments (such as ground fire, explosion or airplane crash) and strong impact. The heat insulation protection device generally mainly comprises an outer shell, an outer cavity heat insulation layer, an inner shell and an inner cavity heat insulation layer. Some small equipment or structural bodies only comprise two parts, namely an outer shell and an outer cavity heat insulation layer. The outer shell is made of titanium alloy or special steel which is high in specific strength, high in compression resistance and penetration resistance and high in melting point. The outer cavity heat insulation layer is a powder material integrally formed through high-pressure mold pressing, the material has a shape-stabilized phase change material with low thermal conductivity and a high-temperature phase change characteristic, and the main components of the material comprise an inorganic particle material, a phase change shape-stabilized material, an endothermic oxide, inorganic fibers and a mixed resin adhesive. The inner cavity shell is made of titanium alloy, stainless steel or refractory fiber materials with high modulus and high heat capacity. The material of the inner cavity heat insulation layer does not need compression molding, and the components can be the same as those of the outer cavity heat insulation layer or other phase change materials.