2843results about How to "Small temperature difference" patented technology

A power plant with at least two pressure vessels containing a hydraulic fluid. A heat exchanging assembly is in heat transferring association with the pressure vessels. The hydraulic conduit is hydraulically connected with the pressure vessels. A power outlet device is in hydraulic association with the conduit between the vessels and is configured for outputing power from the flow of the hydraulic fluid. A controlling mechanism is operably associated with the heat exchanging assembly to cause the heat exchanging assembly to alternately increase the pressure in one of the pressure vessels compared to the other. Thus, hydraulic fluid is caused to flow through the power outlet device alternately between the pressure vessels to produce power from the power output device.

A method and apparatus for providing electrical energy to an electrical device wherein the electrical energy is originally generated from temperature differences in an environment having a first and a second temperature region. A thermoelectric device having a first side and a second side wherein the first side is in communication with a means for transmitting ambient thermal energy collected or rejected in the first temperature region and the second side is in communication with the second temperature region thereby producing a temperature gradient across the thermoelectric device and in turn generating an electrical current.

The production method of sheet billet conticasting tandem-rolling coil sheet is characterized by that said invention adopts the following technical measures: using conticasting machine and making pulling rate of casting blank low, and making the blank material have reasonable section; compactly arranging conticasting machine and heating furnace, making the conticasting blank output roller conveyer and inlet roller conveyer of heating furnace have double purpose, making inlet temp. of casting blank be above 900 deg.C; adopting double furnace and hating; and adopting small-cross charging and tapping process; two-high reversing rougher for three passes, four-high reversing rougher for one pass; and adopting thermal coiler box process of workpiece so as to raise coil sheet quality and reduce its production cost.

The invention relates to an apparatus for producing a reflective membrane with a microprism array structure and solves the defects in the prior art that the hardness, scratch resistance, heat resistance and solvent resistance of microprisms are disappointing, the product consistency is poorer, the production speed is lower, the work efficiency is not high, and the like. The apparatus comprises anannular strip-shaped mould, a heating membrane pressing device and a cooling device, wherein the annular strip-shaped mould is provided with an inner surface and an outer surface which is provided with a convex continuous precise microprism array structure. The apparatus also comprises a coating device, a drying device and a UV curing device. By adding the coating device, the drying device and theUV curing device, the microprism structure is formed after the UV curing of photosensitive resin, the hardness, scratch resistance, heat resistance and solvent resistance of microprism of the microprism structure are greatly improved, and the product consistency is fine. In addition, the apparatus can also obviously improve the production speed and the work efficiency.

The invention provides a method for preparing a thin film heterostructure. The method comprises the steps of providing a wafer substrate with an injection surface; conducting ion injection from the injection surface on the wafer substrate to form an injection defect layer at the predetermined depth of the wafer substrate; providing a support substrate, and performing temperature rising bonding onthe support substrate and the wafer substrate; annealing a obtained structure to form a continuous defect layer; stripping part of the wafer substrate through external force assisting, and forming wafer film on the wafer substrate to obtain a thin film heterostructure including the support substrate and the wafer film. The method can reduce the thermal strain of a bonding structure through the temperature rising bonding, so that the bonding structure remains stable and complete in the high-temperature process, and avoid the problem of film cracking caused by thermal mismatch in the stripping process, the bonding structure is separated from the continuous defect layer through the external force assisting method, so that no effect is caused on a bonding interface, and an external force assisting stripping method can reduce stripping temperature and stripping time, thereby reducing the cumulative effect of thermal stress in a piezoelectric crystal.

The invention discloses a porous sintering heat-insulating hollow block and a manufacturing process thereof. According to the porous sintering heat-insulating hollow block, the void rate is 35 to 60 percent, the density is 700 to 1,000 kg/m<3>, and the coefficient of heat conductivity is less than or equal to 0.22 W/m.K. The porous sintering heat-insulating hollow block consists of the following ingredients in percentage by weight: 30 to 45 percent of solid waste, 45 to 55 percent of inorganic binder and 5 to 15 percent of micropore pore forming agent. The manufacturing process comprises the following steps of: 1, performing grain composition; 2, sieving for grading; 3, weighing raw materials; 4, mixing, homogenizing and aging; 5, extruding for forming; 6, cutting and stacking; 7, drying;and 8, sintering. The porous sintering heat-insulating hollow block is reasonable in design, convenient to realize, high in utilization rate of solid wastes, energy-saving, environment-friendly, highin void rate, low in density, high in thermal performance and strength, stable in size and difficult to crack, can be popularized and used in large areas, and has the excellent economic and social benefits.

The invention discloses an intelligent fruit and vegetable controlled atmosphere carrier vehicle, which comprises a headstock, a chassis, an airtight box and a human-computer interaction interface, and also comprises a control system, an air exchange device, a signal acquisition system, a ventilation system, a liquid nitrogen controlled atmosphere system, a humidifying system, a solar charging system, a temperature control unit, a diesel generator and a dampproof device, wherein the chassis is respectively connected with the headstock and the airtight box; the control system is respectively connected with the human-computer interaction interface, the air exchange device, the signal acquisition system, the ventilation system, the liquid nitrogen controlled atmosphere system, a humidifying system, the temperature control unit and the diesel generator; and the diesel generator is respectively connected with the control system, the ventilation system, the humidifying system, and the temperature control unit. The invention also discloses a method for implementing the carrier vehicle. The intelligent fruit and vegetable controlled atmosphere carrier vehicle and the method have the advantages of making the fruit and vegetable fresh-keeping environment more uniform, improving the quality of the fruit and vegetables, prolonging the fruit and vegetable fresh-keeping period and the like.

The embodiment of the invention discloses an air-conditioner self-adaptation control method which is used for solving the problems of non-uniform temperature distribution of indoor areas and large temperature differences between some areas and a temperature set by a user, which are easily caused in a comfortable temperature control stage of a conventional air conditioner. The method provided by the embodiment of the invention comprises the following steps: calculating the deviation value between an actual temperature value and a set temperature value; converting the deviation value into a corresponding fuzzy quantity according to a preset fuzzy rule; judging whether the fuzzy quantity is less than the deviation value, if no, performing PID fuzzy control which comprises the following steps: calculating a deviation change rate corresponding to the deviation value according to the actual temperature value and the set temperature value; acquiring a calibration frequency through a PID control algorithm and the preset fuzzy rule according to the deviation value and the deviation change rate; and adjusting the working frequency of a compressor into the calibration frequency. The embodiment of the invention further provides an air-conditioner self-adaptation control system.

A freezer-refrigerator comprising: a refrigeration compartment (2) for refrigerating and storing an object to be stored; a freezing compartment (4) for freezing and storing an object to be stored; a first compressor (11) for operating a first refrigeration cycle (10) in which a first refrigerant flows; a first heat dissipater (12) provided to a high-temperature section of the first refrigeration cycle (10); a first evaporator (14) provided to a low-temperature section of the first refrigeration cycle (10); a second compressor (21) for operating a second refrigeration cycle (20) in which a second refrigerant flows; a second evaporator (24) provided to a low-temperature section of the second refrigeration cycle (20); and an intermediate heat exchanger (31) for performing heat exchange between the low-temperature section of the first refrigeration cycle (10) and a high-temperature section of the second refrigeration cycle (20). The first evaporator (14) cools the refrigeration compartment (2), and the second evaporator (24) cools the freezing compartment (4).

The invention relates to an intelligent temperature control cup which comprises a cup body and a cup cover. The cup body is sealed by the cup cover. The cup body comprises an inner container and an outer shell. Heat insulation materials and phase-changing materials are arranged between the inner container and the outer shell. Grooves are formed in the outer wall of the inner container in the radial direction at intervals. Each groove is filled with heat insulation materials. A phase-changing material layer is arranged between the inner container and the outer shell in a sleeved mode. Grooves are evenly distributed in the radial direction of the inner edge column face of the phase-changing material layer at intervals. Each groove is filled with heat insulation materials. A rotating ring is coaxially and fixedly arranged on the outer edge column face of the phase-changing material layer. According to the rotating ring, the phase-changing material layer rotates in the axial direction, and when the phase-changing material layer rotates to the position where the heat insulation materials arranged in the phase-changing material layer grooves in a filling mode and the heat insulation materials arranged in the inner container grooves in a filling mode are crossed and are not overlapped, the heat insulation materials can right seal and surround the inner container. According to the temperature control cup, temperature controlling and preservation can be carried out at multiple points and multiple time periods, and the intelligent, convenient, quick and human-friendly designing concept is reflected.

The invention provides a thin film heterostructure preparation method. The method comprises steps: a wafer substrate with an injection surface is provided; ion implantation is carried out on the wafersubstrate from the injection surface, and an injection defect layer is formed at a preset depth in the wafer substrate; a support substrate is provided, and the support substrate and the wafer substrate are subjected to temperature rise bonding; the obtained structure is subjected to annealing treatment to form a continuous defect layer; the temperature of the obtained structure is reduced to a preset temperature, reverse thermal stress generated based on temperature reduction strips part of the wafer substrate along the continuous defect layer, and a thin film heterostructure comprising thesupport substrate and the wafer thin film is obtained, wherein the preset temperature is lower than the bonding temperature. In the temperature rise bonding mode, the thermal stress of the bonding structure can be reduced, the bonding structure can keep stable and complete in a high temperature process, the problem of wafer crack generated by thermal mismatch in the stripping process can be effectively solved, and through the reverse thermal stress assisting method, the bonding structure is separated at the continuous defect layer and a bonding interface is not influenced.

The present invention relates to an active evaporation control method applicable to long-term on-orbit storage of a cryogenic propellant. According to the method, an active evaporation control device that comprises a composite thermal insulating layer, a steam cooling shield, a heat exchanger, a throttling assembly, a circulating pump, a bypass valve and a steam cooling shield exhaust valve is installed for a propellant storage tank. According to the present invention, with the developed active evaporation control method for a cryogenic propellant, discharge of a small amount of simple gaseous propellant can be achieved under the circumstance of uncertain gas-liquid position under microgravity condition, and pressure control on the cryogenic propellant storage tank and control on evaporation of the cryogenic propellant may be effectively realized under dual action by fully using thermodynamic enthalpy of the discharged cryogenic propellant after being throttled; and the method can allow effective reduction of evaporation loss of the cryogenic propellant in on-orbit use, thus prolonging the on-orbit mission time of a spacecraft.

The invention discloses a cooling system used for an ultra-high strength steel plate thermal die cutting and forming die. The die comprises a concave die and a concave die seat; a water chamber is arranged between the concave die and the concave die seat; the water chamber is communicated with a water inlet and a water outlet. The water chamber is arranged between the concave die and the concave die seat of the invention; after cooled water is inlet in the water chamber, a steel plate workpiece can be quickly cooled by the thermal conduction between the die and the steel plate so as to meet the quenching condition of the steel plate. Especially, the water chamber is also internally provided with a supporting column; the upper end of the supporting column is contacted with the lower bottom surface of the concave die; the lower end of the supporting column is contacted with the upper bottom surface of the concave die seat; therefore, the structural strength of the concave die is ensured, the flowing direction of the water flow can be guided, flow perturbation conditions can be provided, meanwhile, the heat transfer area is increased, and the heat exchange efficiency between the cooled water and the die is improved.

The invention relates to an anti-condensing closed-type display cabinet, which comprises a box body and a glass cabinet door. The glass cabinet door is installed on door frames. The door frames are fixedly connected with the box body. A refrigerating system is installed in the box body. An outer cold air duct and an inner cold air duct are installed in the box body. The first cold air duct outlets of the outer cold air duct are arranged in the box body at positions adjacent to the glass cabinet door, and the first cold air duct outlets and first cold air duct inlets are relatively arranged vertically to form an outer cold air curtain; and the second air duct outlets of the inner cold air duct are arranged in the box body at positions adjacent to the outer cold air curtain, and the second air duct outlets and second air duct inlets are relatively arranged vertically to form an inner cold air curtain. The invention provides the anti-condensing closed-type display cabinet which has a good refrigerating effect and can effectively prevent condensate from occurring on the external surface of the glass cabinet door at the same time.

The invention discloses a power battery composite heat management system and a method thereof. The power battery composite heat management system comprises a water tank filled with a circulating fluid, a circulating pump, a sealing cover plate of the water tank, and a battery pack array which is fixedly mounted above the sealing cover plate and is composed of a plurality of battery cells, wherein a temperature equalizing plate and a heat pipe are adhered onto the surface of each battery cell respectively, and cooing sections of the heat pipes pass through the sealing cover plate to be arranged in the circulating fluid in the water tank; a circulating fluid inlet is formed in one side end of the water tank, a circulating fluid outlet is formed in the other side end of the water tank, and a circulating fluid turbulent flow structure is arranged inside the water tank, so that the circulating fluid flows into the circulating fluid outlet from the circulating fluid inlet of the water tank in a curve flowing manner. The system and the method thereof can solve the technical problems such as heat dissipation, battery pack temperature difference reduction, battery preheating and heat cyclic utilization under different working conditions of batteries; and meanwhile, the system is compact and simple in structure and convenient in installation and maintenance, accords with the development tendency of battery heat management systems and electric automobiles, and has good application prospects.

The invention relates to a dual-damping and dual-power-generating combined damping device comprising a magnetorheological damping temperature difference power generating type damper and an electromagnetic damping temperature difference power generating type damper which are spaced by a magnetic isolating material and a sealing material to form working spaces independent from each other. The magnetorheological damping temperature difference power generating type damper and an electromagnetic damping temperature difference power generating type damper form a synergistic dual-damping damping and synergistic dual-power-generating working mode. The device is of a novel device structure formed by integration, the objective of optimizing and improving comprehensive performance of the device is achieved, and the device is applicable to damping of automobiles, trains, ships, tanks, airplanes, machinery, projects and bridges and vibrating energy recycling for power generation.

The invention relates to a phase-transition energy-storage constant-temperature compound infusion tube, which comprises an infusion tube, an energy-storage material and a protective insulating tube, wherein a phase-transition energy-storage material is arranged between the infusion tube and the protective insulating tube or the phase-transition energy-storage material is arranged in a radial plate cavity between the infusion tube and the protective insulating tube.

The present invention relates to a refrigerant mixture for substituting R502, R22 or R12 used in a vapor compression refrigerator or air conditioner and a refrigeration system using the same. More specifically, the present invention relates to a refrigerant mixture comprising a combination of two or three components, which is capable of being used without causing ozone layer destruction and global warming and at the same time, without replacement of the existing refrigeration system, wherein the components are selected from the group consisting of propylene, propane, 1,1,1,2-tetrafluoroethane, pentafluoroe thane, 1,1,1-trifluoroethane, 1,1-difluoroethane, dimethylether and isobutane; and a refrigeration system using the same.