1197 results about "Heat transfer efficiency" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The invention relates to the technical field of chemical automation control, and discloses an intelligent closed-loop control system for producing p-dichlorobenzene by a biomass method, which comprises a signal acquisition module, a residence time reconstruction module, a thermal coupling analysis module, a parameter self-adaptive scheduling module and an execution control module. The rheological characteristics of raw materials are monitored by collecting the current of a stirring motor, the liquid level is dynamically increased through a retention time reconstruction module to prolong the retention time of the materials, and a liquid level periodic migration strategy is introduced to prevent scaling of a gas-liquid interface; the thermal coupling analysis module and the parameter self-adaptive scheduling module are used for calculating thermal retardation post factors, temperature control parameters are corrected in real time, the upper limit of cooling output is limited, inner wall supercooling crystallization is prevented, and the problems that the conversion rate is reduced, the heat transfer efficiency is reduced and equipment is hung on the wall due to viscosity fluctuation of biomass raw materials are effectively solved. And the self-adaptive stable control of the reaction process is realized.

The invention belongs to the technical field of gravity dam construction, and provides an assembled concrete cooling pipe structure and method for gravity dam construction. The cooling pipe is composed of a plurality of pipe body units connected in series, and lining pieces are arranged in metal pipes of the pipe body units. The lining piece and the elastic steel sheets form a criss-cross cage type structure through the strip-shaped plates, the strip-shaped plates are provided with pitted surfaces and notches, the steel sheets can stretch out and draw back to achieve variable-diameter adjustment, and water flow can be forced to generate turbulent flow to damage the laminar flow bottom layer. The method comprises the steps of raw material pretreatment, notch and pitted surface machining, lining piece assembling, metal pipe assembling and fixing and pipe body unit series connection. The structure is stable, manufacturing is convenient, boundary layer thermal resistance can be reduced, heat transfer efficiency is improved, concrete temperature cracks are reduced, and the gravity dam construction requirement is met.

The utility model relates to the technical field of power batteries, and discloses a heating and cooling system integrated structure and a battery thermal management system, the heating and cooling system integrated structure comprises a refrigeration base material, a first insulating film, a heating core body and a second insulating film, the first insulating film is attached to the refrigeration base material, the heating core body is attached to the first insulating film, and the second insulating film covers the heating core body. As only one layer of insulating film is arranged between the heating core body and the refrigeration base material, compared with the prior art, the heat transfer medium between the heating core body and the refrigeration base material is less, and the heat transfer efficiency is high.

The invention belongs to the technical field of industrial equipment state monitoring and fault diagnosis, and particularly relates to a plate-type evaporator scaling state online monitoring and early warning system which comprises a data acquisition module, a data processing module, an abnormal reason judgment module and a risk early warning module. Different performance abnormity inducements such as scaling, non-condensable gas accumulation and mechanical change can be effectively distinguished, and the method has localized abnormity positioning and multi-factor intelligent traceability capabilities, so that misjudgment can be remarkably reduced; the actual heat transfer efficiency and on-way resistance are obtained through calculation, a comprehensive abnormal value and linear weighted fusion are constructed through a threshold exceeding degree, and visual support of scaling degree grading and a development trend is provided in combination with a time sequence change trend, so that an operator can scientifically plan shutdown cleaning time according to the scaling development trend.

According to the motor, the power system based on the motor and the adjusting method, convex ribs are arranged on an end plate of a rotor, the rotor is used for driving the convex ribs to rotate and driving cooling lubricating oil to form forced circulation in an air gap, the heat transfer efficiency of the rotor and a stator is remarkably enhanced, and the temperature rise of the rotor and the demagnetization risk of a permanent magnet are effectively controlled; meanwhile, the lubrication condition of moving parts is improved, and energy consumption and complexity caused by an extra oil pump are avoided; through the integrated design of the motor shell and a half box body of the gear box and the communicating oil duct of the sealing plate and the gear box, a shared lubricating system is constructed, cooling lubricating oil circulation sharing and heat dissipation cooperation are achieved, the overall structure is simplified, and the system reliability is improved; on the premise that the size and the weight are not increased basically, the comprehensive benefits of improving the heat dissipation performance, simplifying the system structure and reducing the manufacturing cost are synchronously achieved, and the power module is particularly suitable for application scenes with limited space and high power density requirements.

The invention belongs to the technical field of heat dissipation of high-power-density electronic devices, and relates to a topological cold plate and vapor chamber integrated structure which comprises a cover plate, a first heat exchange plate and a second heat exchange plate which are sequentially overlapped from top to bottom and are connected in a sealed mode to form the integrated structure, and a cooling cavity used for containing a liquid working medium is defined between the cover plate and the first heat exchange plate. A phase change cavity used for containing a two-phase heat transfer working medium is defined between the first heat exchange plate and the second heat exchange plate, the cooling cavity and the phase change cavity are independent of each other, and heat transfer is achieved through the solid metal wall face of the first heat exchange plate. During use, the second heat exchange plate is attached to an electronic device, heat generated when the electronic device works is transferred to the second heat exchange plate, so that the two-phase heat transfer working medium in the phase change cavity is evaporated to generate steam, and the steam is diffused in the phase change cavity, then is in contact with the upper wall surface, is condensed when encountering cold and releases latent heat; heat is conducted to the cooling cavity through the first heat exchange plate to be absorbed by the liquid working medium. The structure is compact, the temperature equalizing performance is enhanced, and the heat transfer efficiency is improved.

The invention relates to a comprehensive optimization method and system for thermal conductive plastic performance in the technical field of new materials, and the method comprises the following steps: obtaining initial dispersion state data of an inorganic filler in thermal conductive plastic, and analyzing spatial distribution of filler particles through a scanning electron microscope to obtain characteristic parameters of random distribution of the filler; according to the characteristic parameters of the random distribution of the filler, calculating the heat transfer efficiency among filler particles by adopting a finite element simulation method, and determining the distribution rule of the phonon scattering phenomenon; according to the improved interface bonding strength parameters, the Monte Carlo method is adopted to simulate orientation distribution of filler particles in a matrix, and a preliminary scheme of filler orientation control is obtained; for optimization parameters of complex mold forming, a particle swarm optimization algorithm is adopted to adjust the filler proportion and distribution, and the structure configuration of the efficient three-dimensional heat conduction network is generated; and according to the structure configuration of the efficient three-dimensional heat-conducting network, the improvement degree of the heat-conducting plastic performance is analyzed and verified through a heat-conducting finite element, and final heat transfer efficiency data is obtained.

The invention relates to the technical field of new energy automobiles, and provides a new energy automobile battery heat dissipation management method and system, and the method comprises the steps: building a thermal regeneration model based on battery electric heating parameters, environment parameters and heat dissipation system state parameters which are collected in real time, and generating a battery heat dissipation instruction; in combination with the driving destination mileage of the new energy vehicle, grading execution is performed after the battery heat dissipation instruction is scored through an improved deep Q network model; the heat transfer efficiency of a liquid cooling system, the power consumption of a heat dissipation system and the degradation degree of a three-dimensional temperature distribution field of a battery are calculated in real time after grading execution, and when three continuous set execution cycles meet set conditions, the liquid cooling plate is triggered, selected and executed to be divided into micro-fluidic units, the flow distribution ratio of cooling liquid is solved, and a local flow field is reconstructed. Or the effective heat conductivity coefficient is recognized through the electrolyte impedance spectrum, the phase change material is triggered to be released or removed, and dynamic optimization is carried out on battery heat dissipation management. According to the invention, accurate management and dynamic optimization of heat dissipation of the new energy automobile battery can be realized.

The invention discloses an aerosol generating product which comprises an aerosol generating substrate section, an air inlet is formed in a pipe body corresponding to the aerosol generating substrate section or the sealed end of the pipe body, the air inlet is formed in a heat conduction material, the heat conduction material covers a part of the overall surface of the aerosol generating material, and the air inlet can enable air to flow into the pipe from the outside of the pipe. Not only can the suction resistance be reduced, but also the heat transfer efficiency can be improved, thereby improving the smoke concentration of the first port.

The invention discloses a continuous kettle type nitromethane production process, and relates to the technical field of basic chemical raw material synthesis and flow chemical reaction process control, which comprises the following steps: quantitatively and continuously pumping a temperature-regulated sodium nitrite mixed solution into a raw material mixer in a closed-loop automatic control mode through a variable-frequency feeding pump matched with a mass flow meter; synchronously, quantitatively and continuously pumping dimethyl sulfate into the raw material mixer in a closed-loop automatic control manner by matching a feeding pump with a stop valve and a mass flow meter, and uniformly mixing the two raw materials in the raw material mixer according to the stoichiometric molar ratio of the dimethyl sulfate to the sodium nitrite, according to the tandem type segmented design, each reaction kettle can be subjected to customized temperature field control and heat transfer design specially aiming at the special thermodynamic and dynamic requirements of the reaction stage where the reaction kettle is located, the heat transfer efficiency of the whole system is greatly improved, and due to the fact that reaction heat is taken away timely and accurately, the heat transfer efficiency is greatly improved. And a by-product generation path induced by local abnormal high temperature is effectively restrained.

The invention relates to the field of solar heating, in particular to a solar heat exchange device which comprises a shell and a bottom plate, the shell and the bottom plate form a closed cavity, a heat absorption layer is arranged on the outer surface of the shell, a heat conduction pipe and a phase change energy storage material are arranged in the cavity, and the inlet end and the outlet end of the heat conduction pipe extend out of the side wall of the shell. The phase change energy storage material is arranged around the heat conduction pipe and fills the cavity, a thermal expansion layer is arranged on the inner surface of the bottom plate, and the thermal expansion layer is arranged at the bottom of the cavity. In the invention, the thermal expansion layer is located below the phase change energy storage material. When the temperature rises, the volume of the thermal expansion layer is increased and pushes the phase change material upwards, so that the liquid level of the phase change material is raised, and the phase change material can be in close contact with the top heat absorption layer continuously even in a liquid state. The problems of gaps and thermal resistance caused by volume shrinkage of the phase change material are effectively avoided, it is guaranteed that heat can be efficiently transmitted to the energy storage medium, and therefore the heat transfer efficiency of the solar heat exchange device is remarkably improved.

The invention discloses a surface scraping type energy storage heat exchanger and a working method thereof, and relates to the technical field of energy accumulators, the surface scraping type energy storage heat exchanger comprises a heat exchanger body and a heat exchanger support, and the heat exchanger body comprises a heat exchanger outer shell, a heat exchanger inner shell, a heat production device, a stirring device, a surface scraping device, a pressurizing device and a protective net; a heat exchange sealed space is formed between the heat exchanger outer shell and the heat exchanger inner shell, a heat transfer working medium inlet and a heat transfer working medium outlet are formed in the heat exchanger outer shell, and a heat conduction medium and a phase change material are contained in the heat exchanger inner shell. The pressurizing device is used for pressing the phase-change material in the solid phase, and the surface scraping device is used for scraping the phase-change material which is attached to the inner wall of the heat exchanger inner shell and becomes the solid phase. The heat transfer efficiency during heat absorption and heat release can be improved, the energy storage efficiency is improved, and the actual use requirement that a heat source is a solid heat flow boundary with a fixed heat load and a fluid temperature boundary with a fixed temperature can be met.

The invention relates to the technical field of desulfurization wastewater treatment, and discloses a PPS tube power plant desulfurization wastewater heat exchange system which comprises a heat exchange tube box, a heat exchange assembly arranged in the heat exchange tube box, a cleaning assembly arranged in the water inlet end water guide tank and a turbulent flow assembly arranged in the heat exchange assembly, and the two sides of the heat exchange tube box are both connected with water guide tanks. The heat exchange assembly comprises a first heat exchange tube plate and a second heat exchange tube plate which are fixedly arranged on the inner wall of the heat exchange tube box, a plurality of heat exchange tubes communicating with the interiors of the first heat exchange tube plate and the second heat exchange tube plate are fixedly connected between the first heat exchange tube plate and the second heat exchange tube plate, and the turbulent flow assembly comprises a plurality of spiral plates rotationally arranged on one side of the first heat exchange tube plate. Desulfurization waste water is subjected to heat transfer and energy regulation and control through the heat exchange assembly, fibers and floccules at the water inlet position of the heat exchange assembly are removed through the cleaning assembly, a medium boundary layer in the heat exchange tube box is damaged through the turbulent flow assembly, and the heat transfer efficiency is enhanced.

The utility model provides an aluminum alloy semi-continuous casting device which comprises a launder, a graphite ring, a crystallizer, an electromagnetic stirring unit, an ultrasonic vibration unit and a dummy bar head. The tail end of the launder is communicated with a cavity of the crystallizer so as to lead in aluminum alloy melt, and the graphite ring is arranged on the inner wall of a first water tank of the crystallizer; the dummy bar head is arranged below the graphite ring and moves up and down in the direction of the center axis of the crystallizer. The ultrasonic vibration unit extends into the cavity of the crystallizer to act on the aluminum alloy melt; the electromagnetic stirring unit comprises a plurality of electromagnetic generators and a plurality of second water tanks, the cross sections of the electromagnetic generators are annular, and each electromagnetic generator is arranged in the corresponding second water tank; a second water tank is arranged on the peripheral side of the first water tank of the crystallizer, and a plurality of second water tanks are sequentially arranged below the first water tank of the crystallizer. The action range of an external field in the aluminum alloy melt can be expanded to the maximum extent, the heat transfer efficiency is improved, and the probability of generation of hot cracks is reduced.

The invention discloses a bionic self-regulation heat reservoir which comprises a shell, a heat exchange pipeline, strengthening fins and an external ultrasonic module. The heat exchange pipeline is arranged in the center of the shell, and the two ends of the heat exchange pipeline are an inlet and an outlet. The strengthening fins are evenly arranged on the periphery of the heat exchange pipeline and are designed to be of a constituent arrow structure, the main vein and the trunk meridian of a bionic self-blade are arranged, the forked length and thickness of the adjacent layers meet the self-similarity law, non-uniform semi-open and semi-closed holes are further formed in the fins, and the hole diameter and the hole density change in a stepped mode in the gravity direction. The external ultrasonic modules are arranged on the outer wall of the shell in the gravity direction in a stepped mode. Through the collaborative design of the fractal arrow-shaped reinforced fins and the non-uniform semi-open and semi-closed hole array and in combination with the external gradient ultrasonic module, the heat transfer efficiency and the heat storage and release rate of the phase change material are remarkably improved, and the purpose of self-adaptive convective heat transfer regulation is achieved by means of self-driven thermal deformation of the shape memory material; and the heat storage performance and stability of the system under different working conditions are improved.

The invention relates to the technical field of copper pipe heat dissipation, in particular to a micro-channel heat dissipation device based on a copper pipe structure, which comprises a heat dissipation substrate, a copper pipe type heat dissipation channel and a liquid cooling circulation system, the copper pipe type heat dissipation channel is composed of a plurality of plastic copper pipes and replaces a traditional micro-channel or vapor chamber structure. The copper pipe is embedded or fixed in the heat dissipation substrate or on the surface of the heat dissipation substrate, cooling liquid circulates in the copper pipe, and efficient heat dissipation is achieved through the combined action of forced convection heat exchange and heat transfer; the copper pipe has good plasticity and can be subjected to three-dimensional bending forming according to heat source distribution and spatial layout, through the synergistic effect of forced convection and phase change heat transfer, the heat transfer efficiency is improved, particularly, extremely high local heat flow density can be coped, the chip is effectively prevented from being overheated, and the heat transfer efficiency is improved. The heat dissipation channel can be bent and formed in a three-dimensional space according to heat source distribution, accurate matching with the heat source form is achieved, limitation of traditional plane heat dissipation is broken through, and optimal configuration of heat dissipation capacity and heat flux density is achieved.

The invention provides a wind driven generator blade deicing system and a phase change microcapsule coating spraying process, and relates to the technical field of wind power generation equipment protection, the deicing system comprises a heating module, a spiral flow guide rib, a phase change microcapsule coating and a control module; the heating module comprises a heating piece and a fan communicated with the heating piece; the spiral flow guide rib is used for forming a rotational flow air duct, so that hot air formed by heating of the heating module forms rotational flow air flow; the phase change microcapsule coating is at least coated on the wall surface of the inner cavity of the blade; the control module is in communication connection with the heating piece and the draught fan and is configured to adjust the rotating speed of the draught fan and the heating power of the heating piece at least according to the state of the phase change microcapsule coating. The deicing system improves the heat transfer efficiency, enables hot air to effectively cover all areas of the blade, prolongs the residence time of the hot air in the inner cavity of the blade, and improves the hot air utilization rate. And the phase change microcapsule coating and the rotational flow airflow have a synergistic thermal effect, so that the temperature of the wall surface of the blade is effectively, quickly and uniformly increased, and the deicing efficiency is improved.

The invention belongs to the technical field of aluminum-silicon-based metal materials, and particularly relates to a high-thermal-conductivity composite metal material and a preparation method and application thereof, and the high-thermal-conductivity composite metal material is suitable for heat dissipation requirements of 5G communication equipment, electric vehicle power batteries, spacecraft thermal control systems and the like. A nanocrystalline aluminum alloy matrix is formed by aluminum, magnesium, silicon, scandium and other metal elements, and the problems of anisotropy, obvious thermal response lag, obvious poor cycling stability, boiling critical phenomenon and the like do not exist; meanwhile, the nanocrystalline aluminum alloy matrix comprises a high-density dislocation grid, so that the overall heat transfer efficiency is further improved; in addition, a micro-channel is formed in the nanocrystalline aluminum alloy matrix, liquid metal is poured into the micro-channel to serve as a phase change working medium, and therefore the synergistic effect of active heat transportation and passive heat conduction is achieved. The catalyst layer is used for promoting evaporation-condensation circulation of liquid metal and strengthening phase change heat transfer of a liquid metal working medium; the interface bonding and wettability are enhanced, and the attachment of liquid metal and the channel wall is improved; and phase change working medium oxidation and side reaction are inhibited.

The invention relates to the technical field of heat exchangers, and discloses a shell-and-tube condenser capable of automatically removing a liquid film, which comprises a shell, one end of the shell is provided with a cold water inlet, the other end of the shell is provided with a cold water outlet, the upper end of the shell is provided with an air inlet, and the lower end of the shell is connected with a liquid outlet pipe; a plurality of air uniformizing holes are formed in the air uniformizing cover, the air uniformizing cover divides an inner cavity of the shell into a first cavity body and a second cavity body, a second finned tube is arranged in the first cavity body, a first finned tube is arranged in the second cavity body, and liquid guide fins are arranged on the outer wall of the first finned tube. The finned tube I is arranged, and the liquid guide fins are additionally arranged on the finned tube I, so that the continuity of a liquid film is actively destroyed, the liquid film does not accumulate and grow outside the tube, but accumulates in the liquid guide fins to drop in a liquid drop form, and the problem of thermal resistance caused by liquid film coverage is effectively solved; and the heat transfer efficiency of the whole equipment is obviously improved.

A mold allowing for rapid positioning, and a mold-based creep-age forming method. A blank sheet is placed on a concave mold surface, and a positioning boss of the blank sheet is fitted to a positioning structure for rapid positioning; a high-temperature sealant is pasted on at least two spaced locations around a flange, a breathable felt is laid on the surface of the blank sheet, and a vacuum bag and the breathable felt are respectively pasted on the high-temperature sealant at different locations of the mold flange; and after the breathable felt and the vacuum bag are pasted, a vacuum nozzle is placed to implement direct vacuumization. The risk of breakage of the vacuum bag is effectively reduced. By means of the method, parts can be rapidly positioned, personnel operations can be reduced, high-precision forming can be achieved, batch forming with high consistency can be achieved, and high heat transfer efficiency can be achieved.

The invention discloses a combined marine heat exchanger, and belongs to the technical field of ship engineering, the combined marine heat exchanger comprises two heat exchanger shells, the number of the heat exchanger shells is two, and two fixing discs are fixedly mounted at the positions, close to the top and the bottom, between the inner walls of the heat exchanger shells correspondingly; a plurality of heat exchange tubes are fixedly mounted on the heat exchanger shell through a fixing disc; according to the heat exchanger, the piston rod slides up and down in the piston cylinder in a reciprocating mode to drive the spoiler at the top end of the piston rod to synchronously reciprocate along the outer wall of the heat exchange tube, the spoiler interacts with a shell pass medium in the moving process, and meanwhile the impeller at the top end is driven to synchronously rotate under the impact of the medium; the piston rod drives the spoiler to reciprocate and rotate and disturb the impeller, so that the flow disturbance intensity of a shell pass medium can be enhanced, the flow stability of the medium is broken, a medium retention area on the outer wall of the heat exchange tube is avoided, the heat transfer efficiency is improved, and the stability of the heat exchange performance of equipment is guaranteed.

The invention provides a temperature control system and method based on a fuzzy PID composite algorithm, and relates to the technical field of temperature control. According to the system, the circulation rate of a liquid-phase heat transfer medium is precisely regulated and controlled through a micropump, the gas-phase heat transfer efficiency is enhanced in combination with a fan, and real-time feedback of a temperature detection module and closed-loop cooperative adjustment of a main control module are matched; a composite control framework is constructed through a fuzzy control module and a PID control module, and wide-range, high-precision and rapid temperature control over a target object is achieved. The fuzzy control module dynamically adjusts PID parameters in real time according to the temperature deviation and the deviation change rate, the PID control module outputs accurate control signals based on the adjusted parameters, a micropump and a fan are driven to adjust the temperature of a target object, and the problems that a traditional temperature control system is slow in response, narrow in temperature control range and poor in high and low temperature scene adaptability are solved. The system is suitable for scenes such as temperature control of high-power-density assemblies and heat dissipation of electronic devices.

The invention provides a preparation method of a spicy red oil seasoning. The preparation method comprises the following steps: collecting initial microorganism content data and physicochemical property parameter data of a spicy red oil seasoning sample; according to the basic response characteristic data, aiming at three heating modes of intermittent heating, gradient heating and combined heat treatment; according to the quality stability influence factor data, a multi-dimensional regression analysis method is adopted to process the relevance between the flavor retention parameters and the aroma loss parameters, and fluctuation range data of the sensory characteristics in different heating modes are obtained; judging according to the matching degree of the fluctuation range data and the physicochemical property parameter data, and if the matching degree is lower than a preset matching degree threshold value, adjusting a heat transfer efficiency parameter to obtain optimized temperature distribution data; according to the heating mode parameters corresponding to the optimal balance point data, the change data of the flavor retention degree and the grease oxidation degree are verified through a real-time monitoring system, and final sterilization process parameter combination data are obtained.

The application belongs to the field of chemical mass and heat transfer enhancement technology, and discloses a macro-quantity structured micro-scale vortex packing structure, method and application. The packing structure is a packing with a multi-scale microstructure on the surface. The microstructure causes boundary layer separation and vortex shedding when fluid flows through, generates stable micro-scale vortexes at the microstructure, and forms a macro-distributed vortex group in the packing. The vortex can cut the boundary layer, stretch and fold the fluid micro-element, and promote the periodic update of the interface, thereby improving the gas-liquid mass and heat transfer efficiency. The application significantly reduces the pressure drop. Under the same operating conditions, the pressure drop of the packing structure of the application is reduced by more than 50% compared with the conventional packing, and the pressure drop increment caused by the vortex structure is less than 15%, realizing the synergistic optimization of mass transfer enhancement and low pressure drop.

The invention discloses a methane and carbon dioxide dry reforming reactor in the technical field of methane reforming reactors, which comprises a reaction tank, a multi-section lens column is rotatably mounted in the lower end of the reaction tank, the lower end of the reaction tank is divided into an outer heating bin and an inner reaction bin by the multi-section lens column, and a light energy introduction assembly is arranged at the upper end of the reaction tank. The light energy introduction assembly comprises a fixed lens group which comprises a biconvex lens and a biconcave lens, the biconvex lens is fixedly mounted at the upper end of the reaction tank, and the biconcave lens is mounted between the biconvex lens and the multi-section lens column; the rotating lens group is composed of a plurality of movable units, the movable units are installed on the edge of the upper end of the reaction tank at equal intervals, each movable unit comprises an installation frame and a movable convex lens, the inner reaction bin and the outer heating bin are arranged in a sleeving mode, loss in the heat transmission process is reduced, and through the effect of a multi-section lens column and a biconcave lens, the heat transfer efficiency is improved. And the guided light energy is dispersed, so that the light energy can be uniformly distributed.

A thermal management system for electric construction machinery, the thermal management system comprising a battery pack (1), a first liquid storage tank (2), a first liquid pump (3), a plurality of first air-conditioning units (4) arranged in parallel, a heat dissipation group (5) and a first controller (6), wherein the battery pack provides a driving force; the first liquid storage tank stores a circulating medium; the first liquid pump is in communication with the first liquid storage tank; the first liquid pump is connected to the battery pack to form a first circulating loop (100); the first liquid pump drives the circulating medium to flow through the battery pack, such that the circulating medium exchanges heat with the battery pack; each first air-conditioning unit comprises a compressor (41), a condenser (42), a first throttling device (43) and a first evaporator (44), and the first air-conditioning units reduce the temperature of the circulating medium in the first circulating loop; the heat dissipation group dissipates heat from the condensers in the first air-conditioning units and / or reduces the temperature of the circulating medium flowing through the battery pack; and the first controller controls, on the basis of the temperature of the battery pack, the plurality of first air-conditioning units and the heat dissipation group to start and stop. The thermal management system effectively reduces the number of heat dissipation groups, thereby facilitating an improvement in the heat transfer efficiency of the system, and improving the energy consumption of a whole vehicle. In addition, further disclosed are a control method and electric construction machinery.

The invention provides combustion firmware as well as a preparation method and application thereof. The combustion firmware is prepared from the following raw materials: modified fibers, carbon powder, a forming agent, metal oxide and inorganic salt. According to the combustion firmware, a heat source is provided for the aerosol generation section in an ignition mode, and compared with an electric heating cigarette, a smoking set does not need to be heated; compared with a carbon heating cigarette, the burning firmware provides a heat source in an ignition mode, the burning condition of the firmware can be seen from the appearance, and the use safety is effectively improved. The combustion firmware adopts the cylinder with the porous channels, and when the combustion firmware is ignited and smoked, the porous channels can effectively transfer heat to the aerosol generation section. Particularly, the combustion firmware can react with CO generated by incomplete combustion of the combustion firmware by adding the copper oxide, the content of CO in aerosol is reduced, and the copper oxide has thermal conductivity and can also improve the heat transfer efficiency after the combustion firmware is ignited.

The invention relates to the technical field of crossing of mechanical engineering and thermodynamics, in particular to novel intermittent piston equipment. The device is characterized by comprising a gas-liquid cylinder system, a piston system, a feeding system, a discharging system and a cooling system, wherein the gas-liquid cylinder system comprises a plurality of partition plates with holes and can further comprise a plurality of monitoring control assemblies, and the piston system comprises a plurality of piston push plates with holes and a plurality of piston driving mechanisms and can further comprise a plurality of monitoring control assemblies. The cooling system comprises a plurality of thermal contact modules, a plurality of heat transfer modules and a plurality of heat dissipation terminals, and can further comprise a plurality of monitoring control assemblies. A perforated partition plate, a perforated piston push plate and a monitoring control assembly are additionally arranged in an existing piston equipment technology, meanwhile, piston pushing and cooling system cooling integrated intermittent operation is adopted, the position of a piston and fluid pressure are monitored in real time, a driving signal is dynamically adjusted, and the working efficiency is improved. Efficient conversion between mechanical energy and gas pressure energy, hydraulic energy or fluid heat energy and precise control over the fluid temperature are achieved, the compression, expansion and mass transfer and heat transfer efficiency of fluid in equipment is greatly improved, the technical application scene is wide, and the technical application value is high.

The utility model discloses an automobile cup stand with a refrigeration function, which comprises a cup stand, a refrigerant pipeline is wound on the outer wall of the cup stand, the cup stand is provided with a container which is in clearance fit with the inner wall of the cup stand, and a refrigerant outlet and a refrigerant inlet of the refrigerant pipeline are connected to an automobile air conditioner refrigerant circulating pipeline. The cup stand has the advantages that the temperature can be directly controlled, the heat transfer efficiency is high, the cup stand is fully combined with an air conditioner refrigeration system, the structure is simple, newly-added components are conventional vehicle devices, the overall increased cost is controllable, and the cup stand with the refrigeration function can be achieved at low cost.