37results about How to "Improve uneven heating" patented technology

The invention relates to the technical field of semiconductor illumination and provides a network-shaped electrode applicable to high-power GaN-based LED chips. Each electrode of a chip is composed of a network-shaped electrode and metal pads, the adopted electrodes at least have center inversion symmetry, secondary axial symmetry and quartic axial symmetry, wherein the secondary axial symmetry and the quartic axial symmetry are achieved by surrounding and being perpendicular to the center normal of the chip, and accordingly the electrodes can coincide when the chip rotates by 180 degrees, 270 degrees and 360 degrees around the center normal. A portion above an N-type GaN layer in an epitaxial layer is divided into multiple independent units not contacting with one another by the aid of N-type electrode slots on a projection plane perpendicular to the chip central axis, so that the units are unaffected by one another. Current distribution is more even by more electrode symmetry elements, and uneven heating of the chip is improved effectively. P-type metal pads and N-type metal pads can be selectively connected during routing by the aid of high symmetry of the P-type metal pads and the N-type metal pads, and accordingly flexibility of routing is improved.

The invention belongs to the technical field of laser welding, and provides a method for assisting high-temperature laser brazing through self-propagating reaction of a nano-multilayer film. A double-metal nano-film is alternately deposited on a substrate by adopting a magnetron sputtering method; the deposited double-metal nano-multilayer film is stripped from the substrate; the stripped multilayer film is arranged between two layers of brazing materials, so that a composite intermediate layer is formed; surface pretreatment is conducted on base materials to be welded; and the composite intermediate layer is arranged between obtained base materials, a lap joint mode is adopted for welding, and lasers are adopted for carrying out scanning welding on the composite intermediate layer. The nano-multilayer film is subjected to the self-propagating reaction after being ignited by the lasers, a large amount of heat released by the reaction can melt low-melting-point brazing materials, and thus connection is achieved on both lap joints and whole lap-joint faces in the welding process, so that the joint connecting strength is improved, and material connection is completed. By means of the method, heating nonuniformity of the lasers used as local heat sources can be relieved, the more uniform interface reaction is achieved, and the joint density can be increased.

The invention discloses a flexible far infrared heating aramid nano-fiber thin film and a preparation method. The flexible far infrared heating aramid nano-fiber thin film is prepared by uniformly dispersing carbon nanotubes with a nano-scale structure and excellent mechanical properties and electric properties and aramid nano-fibers with excellent mechanical properties, and the film forming performance of the aramid nano-fibers and the advantages that a strong network crosslinking structure is easily generated by abundant functional groups on the surfaces of the aramid nano-fibers are sufficiently expressed; the dispersion performance and film forming performance of the carbon nanotubes are cooperatively improved and an aramid nanocellulose based novel material with flexibility, conductivity and low-temperature far infrared heating performance is developed; the problems of a current flexible heating material that the surface is not uniformly heated, the temperature different is too great, the heating performance is not stable and the service life is relatively low are improved, and the product grade is improved; and the flexible far infrared heating aramid nano-fiber thin film canmeet the requirements of application to electric heating physiotherapy functional clothing, intelligent physiotherapy safety clothing, medical far infrared therapy chambers and the like.

The invention discloses an electric heating concrete plate for heating. The electric heating concrete plate is prepared from the following raw materials in parts by weight: 100 parts of cement, 100-300 parts of heat-conducting aggregate, 0-150 parts of common aggregate, 5-15 parts of a conductive material, 25-55 parts of water, 0-4 parts of a defoaming agent, 0.5-1 part of a water reducing agent and 0.5-1 part of an early strength agent, wherein the early strength agent is at least one selected from calcium acetate and calcium formate. The heat-conducting aggregate is added into the electric heating concrete plate, so the heat-conducting property of the electric heating concrete plate is improved, and the condition of uneven heating of the plate can be improved; and calcium acetate and calcium formate are used as the early strength agent, so the early strength of the poured electric heating plate can be improved, and the resistivity of the plate can be reduced to a certain extent, thereby reducing the consumption of the conductive material and lowering production cost.

The invention discloses a positive plate, a negative plate, a battery cell, a lithium battery and a preparation method of the lithium battery, and belongs to the technical field of batteries. Positiveand negative tabs on the positive and negative plates belong to embedded tabs; on the premise that the shape and size of the battery are kept the same, the mass energy density of the embedded tabs ishigher than that of the extended tabs; meanwhile, due to the fact that an area ratio of the positive and negative tabs is low, the internal space utilization rate of the battery is high, and the advantages of high compaction surface density of the positive and negative plates and larger battery capacity are achieved; and the positive and negative tabs are positioned at the two ends of the positive and negative plates respectively, so that the problem of non-uniform heating in the charging and discharging processes of the lithium battery can be effectively improved, and the safety and reliability of the lithium battery are improved.

An aroma diffuser includes a housing, a burner, a thermal conducting device and a hollow annular fragrance capsule. The burner and the thermal conducting device are combined in the housing. The thermal radiation of the thermal conducting device can be continuously and effectively transmitted to the donut-shaped fragrance capsule and the fragrance substance to quickly produce a stable aroma. The fragrance capsule is provided with a breathable film that prevents the fragrance substance from flowing to the outside of the fragrance capsule to contaminate the burner or the surroundings. The breathable film is formed of a fixing film and a microporous film. The fixing film combined with the microporous film is not deformed or ugly when heated, and the aroma can be diffused outward from the breathable film. The fragrance substance can be quickly replaced with another fragrance capsule after use.

The invention relates to a novel Pt-Co/NC catalyst and a preparation method and application thereof. In the Pt-Co/NC catalyst, nitrogen-doped carbon is used as a carrier, metal Co (cobalt) is used asa cocatalyst, and precious metal Pt (platinum) is used as a main catalyst. In a fuel cell, a catalyst in a membrane electrode is easily in contact with a reactant oxygen, and the ORR activity and durability are improved under the synergistic catalytic action of platinum-cobalt. Main active components of the catalyst are Pt and Co, the catalyst is prepared by means of coprecipitation, high-temperature roasting, solvent evaporation and the like, and the preparation method is simple and convenient to operate. According to the Pt-Co/NC catalyst, porous carbon NC obtained after acid etching provides a very good loading surface and pore channels for metal particles, and platinum metal can be uniformly distributed. Nitrogen-doped carbon can activate ORR (oxygen reduction) reaction, indirectly plays a role in replacing rare precious metal platinum, is beneficial to manufacturing low-price fuel cells with low manufacturing environment load, and is more beneficial to promoting global energy distribution and development under the condition of not being controlled by resources.

The invention provides a disinfection cabinet and a control method of the disinfection cabinet, and relates to the technical field of disinfection cabinets. The disinfection cabinet comprises a cavity, wherein a heating pipe and a temperature collector are arranged in the cavity and are respectively connected with a main controller; the main controller is used for receiving mode setting information inputted by a user, tableware surface temperature and the temperature in the cavity collected by the temperature sensor, and is used for driving the heating pipe to run according to the mode settinginformation, the tableware surface temperature and the temperature in the cavity. The control method comprises the following steps of receiving the mode setting information inputted by the user; according to the mode setting information, enabling the temperature collector to collect the tableware surface temperature and the temperature in the cavity at a preset collecting interval; according to the tableware surface temperature and the temperature in the cavity, controlling the working state of the heating pipe. The disinfection cabinet and the control method of disinfection cabinet have theadvantages that the problem of nonuniform heating of the tableware surface temperature in the cavity can be improved, and the tableware drying effect is improved.

The invention discloses a fiber heat treatment device. The fiber heat treatment device comprises a reaction kettle body, a center shaft, a tow bearing device and a gas spraying device are arranged inthe reaction kettle body, wherein the tow bearing device is arranged on the center shaft and used for containing package fibers, and the central shaft is connected with an external driving mechanism.The invention further provides a fiber heat treatment system and a heat treatment method. According to the heat treatment reaction device, the whole roll of package fibers are placed on the tow bearing device, the space utilization rate of the heat treatment reaction device is increased, the heat treatment yield and the heat treatment efficiency are improved, and industrialization of fiber heat treatment is conveniently achieved; and meanwhile, the driving mechanism drives the center shaft to rotate so as to drive the whole roll of package fibers to rotate in the heat treatment process, the gas spraying device inputs inert gas into the heat treatment reaction device, the package fibers make full contact with the inert gas atmosphere, and small molecules separated out of the surfaces of thefibers due to the heat treatment reaction are blown away and brought away, so that heat treatment efficiency is improved.

The invention relates to a fin type pulsating heat pipe phase change energy storage integrated module and application. The fin type pulsating heat pipe phase change energy storage integrated module comprises a steel plate box which is formed by stainless steel plates, the lower layer of the steel plate box is paved with a polyurethane insulation layer, a plurality of sets of pulsating heat pipes are arranged in the steel plate box, fins for enhanced heat transfer are fully distributed on the pulsating heat pipes, the steel plate box is filled with a phase change energy storage material, and the upper end of the steel plate box is sealed with an aluminum plate. According to the fin type pulsating heat pipe phase change energy storage integrated module and application, the thermal inertia ofa radiator arranged at the tail end is perfected, the water supply temperature required by a heating system is reduced, efficient and multiple utilization of energy sources in building heat supply isachieved, and the problem that at present, the environment is polluted by country fire coal heating in cold regions is solved.

The invention discloses a phase-change buoyancy engine based on microwave heating. The phase-change buoyancy engine comprises a buoyancy generating unit and a temperature control unit. The buoyancy generating unit comprises a clamp, a sealing ring, a casing, a heat insulating material, a phase change material, a base and a watertight connector. The temperature control unit comprises a magnetron, afilter conduit, a metal reflector, a metal heat-radiating plate, a power supply and a switch. The phase-change buoyancy engine has the advantages that a microwave heating device is used for rapid anduniform heating, and accordingly, the problem that phase change materials in the prior art are heated slowly and unevenly is solved.

The invention discloses a glass hot bending forming device and method. The device comprises a conveying mechanism, a feeding and discharging mechanism, a preheating mechanism, a forming mechanism and a cooling mechanism, the conveying mechanism comprises a production conveying module and a backflow conveying module, and the production conveying module sequentially penetrates through the preheating mechanism, the forming mechanism and the cooling mechanism; and the backflow conveying module is used for conveying glass finished products in the mold to the feeding and discharging mechanism in a backflow mode for material taking operation, the production conveying module comprises a first conveying frame, the backflow conveying module comprises a second conveying frame, and the first conveying frame and the second conveying frame are each provided with a plurality of first rollers at intervals. A to-be-processed glass blank is transferred into the mold through the feeding and discharging mechanism, so that the mold is respectively transferred to the preheating mechanism, the forming mechanism and the cooling mechanism under the driving of the conveying mechanism to be processed to prepare a glass finished product, and then the glass finished product in the mold is returned and conveyed to the feeding and discharging mechanism for material taking operation; therefore, whole-course automatic operation is achieved, and machining efficiency is improved.

The invention provides a cooking device, and relates to the technical field of household appliances. According to the cooking device, a shell is provided with a hollow cooking cavity used for containing food, and the height of the cooking cavity is smaller than a preset value; the baking tray assembly is fixedly connected with the shell, is arranged below the cooking cavity, is adjacent to the cooking cavity and is used for bearing food; the light wave tube is connected with the shell and arranged above the cooking cavity so as to heat food through heat radiation; the light wave tube comprises a first light wave tube extending in an arc shape and two second light wave tubes arranged at the two ends of the first light wave tube respectively; wherein the first containing cavity in the first light wave tube communicates with the second containing cavity in the second light wave tube to form a containing cavity used for containing the heating wire, and the heating wire located in the first containing cavity and the heating wire located in the second containing cavity are both arranged in a winding mode. According to the cooking device, the uniformity degree of food heating can be effectively improved.

The embodiment of the invention discloses a buffer material mechanism. The buffer material mechanism is used for solving the technical problems that a buffer process does not exist in the material conveying process of existing cutting machines, consequently, part of materials are heated unevenly, and white points of straight-cut splits exist. The buffer material mechanism disclosed by the embodiment comprises a first machine frame, a second machine frame and a buffer material device. The buffer material device comprises a charging air swelling shaft, a transition shaft, a first pulling shaft,a third pulling shaft, a fifth pulling shaft, a second pressing roller and a floating roller. The first pulling shaft, the third pulling shaft and the fifth pulling shaft are transversely arranged between a first machine frame and a second machine frame and connected with the first machine frame and the second machine frame. A first end of the floating roller is connected with a first driving assembly. A second end of the floating roller is connected with a second driving assembly. The floating roller is transversely arranged between the first machine frame and the second machine frame and canbe driven to move between the first pulling shaft and the third pulling shaft in the vertical direction.

The invention discloses a heat treatment device for an elastic titanium-nickel alloy glasses leg linear blank. The heat treatment device comprises a heat-resistant glass tube, a high-frequency coil and a protective gas introducing device, the heat-resistant glass tube is vertically arranged and provided with a through hole in the axial direction, the through hole comprises a feeding port and a discharging port, the high-frequency coil is wound around the outer circumferential face of the heat-resistant glass tube, and the protective gas introducing device is communicated with the through hole.The high-frequency coil is wound on the heat-resistant glass tube and is used for heating the heat-resistant glass tube, so that the environment temperature in the through hole serving as a linear blank passing path meets the heat treatment requirement. The protective gas introducing device is arranged, and protective gas is introduced into the through hole of the heat-resistant glass tube from agas hole in the heat-resistant glass tube, so that the linear blank is protected by the protective gas when passing through the through hole.

The invention relates to a tap water treatment biological tank temperature regulation and control device. The device comprises a biological tank, a mounting rack is arranged at the bottom of the biological tank, and a plurality of temperature detection regulation and control units are uniformly distributed on the mounting rack. Each temperature detection regulation and control unit comprises a connecting ring, and three temperature sensing units are uniformly distributed on each connecting ring. Each temperature detection regulation and control unit further comprises a heating assembly, a rotating assembly and a deflection adjusting assembly. The connecting rings are further provided with a controller, and the controller receives data sensed by the temperature sensing units and regulates and controls the heating assembly, the rotating motor and the deflection adjusting assembly. The problem of uneven temperature rise in the prior art is solved, meanwhile, temperature compensation of different areas can be well and automatically carried out, the temperature balance in the biological tank is greatly enhanced, and meanwhile the capacity of resisting external interference to the temperature can be remarkably improved.

The invention discloses a tea frying machine with a comprehensive effect. The tea frying machine comprises a pot body, wherein the pot body is arranged on a metal frame; a gas stove is arranged below the pot body; a flame gun is arranged inside the gas stove; gas is conveyed into the flame gun through gas pipelines. The tea frying machine is characterized in that the gas stove consists of an inner layer and an outer layer; and three gas pipelines are respectively positioned on the outer layer, the inner layer and another outer layer of the gas stove. The tea frying machine has the beneficial effects that the situation of non-uniform heating can be alleviated by using multiple heat sources, tea leaves can be uniformly heated, a good tea frying effect can be achieved, meanwhile, the heat source on the outer layer can be moved, so that the fixed heat source can be changed into a movable heat source, the whole heating stability can be enhanced, and the tea frying machine is simple and practical and remarkable in effect.

The invention discloses a distributed microwave phase control method, which comprises the following steps that a plurality of phase control power modules input microwaves into a cavity through each input port, so that the microwaves in the cavity are distributed in a first electric field; and each phase control power module adjusts the phase of the microwaves input into the cavity by each input port, so that the microwaves in the cavity generate second electric field distribution complementary to the first electric field distribution due to the change of the phase.