703results about How to "Promote reflux" patented technology

A lead frame comprising a frame which defines a central opening. Disposed within the central opening is a die pad which is connected to the frame. Also connected to the frame are a plurality of leads which extend within the opening toward the die pad. Each of the leads defines opposed top and bottom surfaces, an inner end, an outer end, and an opposed pair of side surfaces. The bottom surface and the outer end collectively define a corner region of the lead. Formed within the corner region is a recess which is sized and configured to accommodate the flow of reflow solder thereinto.

This invention discloses a gas-liquid lifting biological fluidized bed reactor. The gas-liquid lifting biological fluidized bed reactor comprises a reactor main body. The reactor main body comprises a water distributor, a biological filler layer, a microporous aeration ring, a reactor partition plate, a reverse flow baffle, a biological carrier, a ladder reverse flow port, a middle water inlet, a sampling port, a precipitation zone water inlet pipe, and a precipitation zone reverse flow pipe. The precipitation zone water inlet pipe and the precipitation zone reverse flow pipe are connected with the precipitation pipe. A gas exhaustion port is set at the top of the reactor main body. The upper water outlet of the precipitation pipe is connected with the reverse flow water tank, the reverse flow water pump, the reverse flow water valve, a reverse flow meter, and the ladder reverse flow port. The gas exhaustion port is connected with the gas collection tank, the second gas pump, and the ladder reverse flow port. The microporous aeration ring is connected with the gas rotameter, the gas inlet valve, and the first gas pump. The top water distributor is connected with the top water inlet flow meter, the top water inlet valve, the water inlet pump, and the water inlet tank. The gas-liquid lifting biological fluidized bed reactor is suitable for high-efficiency biological treatment of high-ammonia nitrogen wastewater, and has such advantages as high denitrogenation efficiency and low energy consumption.

The invention discloses a plate-type pulsating heat pipe used in large power LED heat radiation, comprising a cover plate, a substrate, a capillary beam, a liquid plug, a cavity, a capillary beam lower bend set, a capillary beam upper bend set, a liquid feeding port and a LED chip installation screw hole. The capillary beam, the cavity communicated with the capillary beam bottom and the liquid feeding port positioned on the upper portion of the capillary beam and communicated with the capillary beam are milled on the substrate. A cross section of the capillary is a rectangular cross section or a triangular cross section. Two ends of each capillary beam are respectively independently connected with the cavity, and the connection positions are unsymmetric. The substrate and the cover plate are connected through vacuum brazing. The liquid feeding port is arranged with a valve and forms a sealed space that can form a vacuum environment. The installation screw hole is in external connection with the LED chip, and the cavity is equipped with a capillary core or a micro-channel structure. The heat pipe has the characteristics of stable work, high heat transferring efficiency, high heat transferring limit, and low temperature fluctuation in an evaporation zone.

The invention relates to a stall protection device of an electromagnetic control type cosmetic stirring device, which relates to the technical field of cosmetics, and comprises a fixed seat, a stirring rod is movably connected to the inner side of the fixed seat, uniformly distributed sliding grooves are formed in the inner wall of the stirring rod, and first springs are fixedly connected to the inner walls of the inner sides of the sliding grooves. The invention discloses the stall protection device of the electromagnetic control type cosmetic stirring device. A dielectric plate is matched with a resistor for use; centrifugal force can be generated when rotating shaft rotates, at the moment, a sliding block can move towards the outer side under the action of the centrifugal core; when therotating speed is too high, the sliding block can move to the outermost end of the sliding groove; at the moment, the dielectric plate reduces the relative area of the positive plate and the negativeplate to the minimum; an electromagnet is powered off, the clamping block contracts into the rotating shaft and is separated from the stirring rod, and the stirring rod stalls, so that the effect ofstall protection is achieved, raw materials can flow back to the middle easily, and the mixing and stirring quality is improved.

The invention discloses a silica-based unequal-width microchannel flat heat pipe and a manufacture method thereof. By using a principle that liquid flows in a microchannel without a mechanical force under the action of surface tension and an MEMS (Micro Electro Mechanical System) technology, unequal-width rectangular or V-shaped microchannels with same cluster structures and continuously-changing widths are respectively etched on two rectangular silicon chips, rectangular glass sheets completely same with the silicon chips in sizes are etched to form hollow glass rings as steam cavities of flat heat pipes, and the glass rings and the upper and the lower silicon chips are packaged together to form the silica-based unequal-width microchannel flat heat pipe by adopting a static packaging method. Under the condition of smaller liquid filling rate, working liquid is accelerated to flow from a wide end to a narrow end through capillary pressure difference generated by liquid surface tension at two ends of an unequal-width microchannel, thus heat transfer efficiency is improved, capillary limit of the heat pipe is greatly improved, and heat transfer capacity of the heat pipe is increased; and the silica-based unequal-width microchannel flat heat pipe can be used in a heat-radiating system of a high heat-flow density chip for solving the heat radiation problem of a high-performance chip.

A method of filling high aspect ratio features with active electronic or conductive materials. In one method, high pressure extrusion is used to urge the as-deposited active or conductive material into an incompletely filled opening. In another method, a rapid thermal anneal process is used to induce reflow of the as-deposited active or conductive material into an incompletely filled opening. Both methods are also effective in densifying active or conductive materials within openings by collapsing voids that arise in the as-deposited state. The instant methods provide for more uniform and consistent filling of openings and minimize the variability and impairment of electrical characteristics of active material devices. Active materials include phase-change materials, chalcogenide materials, switching materials, and programmable resistance materials.

The heat pipe includes one casing, at least one capillary structure layer adhered to the inner wall of the casing and work medium filled into the heat pipe, where, the casing has at least one protecting layer and the capillary structure layer is provided with one hydrophilic layer. The making process of the heat pipe includes the steps of: 1. providing one metal plate; 2. surface treatment via a laser technological process; 3. vacuum filming to deposit the capillary structure layer and the hydrophilic layer on side of the metal plate at vacuum degree higher than 5E(-6) Pa and deposit protecting layer on the other side of the metal plate; 4. winding the metal plate into pipe and sealing the seam and one end to form heat pipe casing; 5. filling the casing with work medium and pumping to form vacuum; and 6. sealing the casing.

The invention proposes a new type of flat heat soaking pipe and discloses its laser preparation method, which includes an upper plate, a lower plate and liquid injection and air extraction pipes, all components are made of copper material, the lower plate of the flat heat pipe is the evaporation section, the upper plate It is the condensation section and the middle section is the heat insulation section. The inner wall of the upper and lower plates is processed with a groove structure. The groove structure is processed into a grooved composite pin-fin structure by laser according to the working principle of the heat pipe. Laser etching can be sequentially processed on the surface of the copper plate to obtain different Characteristic complex shape microstructures. The invention can improve the boiling performance of the evaporating section and the start-up performance of the heat pipe, and the steam cooling performance of the condensing section. The pin-fin structure can not only strengthen the strength of the heat pipe and reduce the interface shear force, but also facilitate the rapid reflux and dripping of the condensate on the upper plate to the lower plate. A cycle is formed to improve the heat transfer performance of the heat pipe.

The invention discloses a lower limb vein thrombosis prevention and treatment instrument and relates to the field of medical instruments. The lower limb vein thrombosis prevention and treatment instrument comprises a lower limb cushion and a massage device. The lower limb cushion comprises a shank cushion plate and a thigh cushion plate which are hinged. The thigh cushion plate is connected with an adjusting rod penetrating through a fixed seat. The massage device comprises a main machine and a leg sleeve. The main machine comprises a box internally provided with an electromagnetic air pump, an electromagnetic water pump, an electronic temperature adjusting device and a constant-temperature water tank. A panel of the box is provided with a time control instrument, a pressure dial gauge, a pressure adjusting valve and a temperature control instrument. The time control instrument, the pressure dial gauge and the pressure adjusting valve are connected with the electromagnetic water pump, and the temperature control instrument is connected with the electronic temperature adjusting device and the electromagnetic water pump. The leg sleeve comprises an air bag communicated with the pressure adjusting valve, and a cushion blanket arranged on the surface layer. The problems that in the prior art, the angle and the height of a lower limb cushion cannot be adjusted, the lower limb is prone to slide down from the two sides, the popliteal space is prone to be pressed, blood circulation is affected, and the cold-proof and heat preservation effect on the affected limb is poor and the problem that the inflation and deflation pressure of a pressure anti- thrombosis pump cannot be adjusted at any time are solved.

A method of fabricating a CMOS image sensor is provided, in which a trapezoidal microlens pattern profile is formed to facilitate reflowing the microlens pattern and by which a curvature of the microlens may be enhanced to raise its light-condensing efficiency. The method includes forming a plurality of photodiodes on a semiconductor substrate; forming an insulating interlayer on the semiconductor substrate including the photodiodes; forming a protective layer on the insulating interlayer; forming a plurality of color filters corresponding to the photodiodes; forming a top coating layer on the color filters; forming a microlens pattern on the top coating layer; and forming a plurality of microlenses by reflowing the microlens pattern.

In a reverse conducting semiconductor device, which forms a composition circuit, a positive voltage that is higher than a positive voltage of a collector electrode may be applied to an emitter electrode. In this case, in a region of the reverse conducting semiconductor device in which a return diode is formed, a body contact region functions as an anode, a drift contact region functions as a cathode, and current flows from the anode to the cathode. When a voltage having a lower electric potential than the collector electrode is applied to the trench gate electrode at that time, p-type carriers are generated within the cathode and a quantity of carriers increases within the return diode. As a result, a forward voltage drop of the return diode lowers, and constant loss of electric power can be reduced. Electric power loss can be reduced in a power supply device that uses such a composition circuit in which a switching element and the return diode are connected in reverse parallel.

The invention provides a method for preventing cold steel in a vacuum tank from bonding in the RH vacuum cycle degassing process. The method comprises the steps that (1) a steel ladle adopts a normaltransfer ladle and the transfer time is less than 60 minutes; (2) molten steel enters an RH refining furnace, the temperature of deoxidized molten steel is controlled to be greater than 1620 DEG C, and the temperature of non-deoxidized molten steel is controlled to be greater than 1600 DEG C; (3) when the RH refining furnace is subjected to OB temperature rise or OB forced decarburization, the vacuum degree in the vacuum tank is 5-15 kpa and the circulation gas flow is 1400 NL/min; (4) in 5 mins when the decarburization of the RH refining furnace is carried out, the circulation gas flow is controlled at 1600 NL/min, and during the period from the 5 mins to the time the decarburization is finished, the circulation gas flow is controlled at 2000 NL/min; (5) 3 mins after aluminum is added tothe molten steel for deoxidation, other alloys are added; (6) after the molten steel is alloyed, 200 kg desulfurizing agent is added; (7) the temperatures of an upper part tank and a hot bending pipeare increased by employing a top gun to heat, wherein the gun position of the top gun is 8.5 m, the flow of gas is 200 NM<3>/h, and the flow of oxygen is 220 NM<3>/h; and (8) when the pure degassing cycling time of the molten steel is greater than 8 mins, treatment is finished. The cold steel in the vacuum tank can be prevented from bonding effectively, and the operation rate of the RH refining furnace is raised.

The invention relates to the field of medical equipment and specifically relates to a self-adapting wearable anti-thrombus treating device and a control method thereof. The self-adapting wearable anti-thrombus treating device comprises a main engine and a pressure airbag component which is connected with an air channel of the main engine; the pressure airbag component comprises a plurality of multi-cavity pressure airbags independent from each other; the main engine comprises a detection treating module and a control module, wherein the detection treating module is used for detecting the optimal vein suffering pressure and vein refilling time through the multi-cavity pressure airbags; and the control module is used for automatically acquiring the optimal vein suffering pressure and the vein refilling time and taking as the treating pressure and the aerating and deflating air cycle interval time of the pressure airbag component for treating a patient. On the basis of the realization of portability and wearable property, the self-adapting wearable anti-thrombus treating device also can take the automatically detected vein refilling time and vein suffering pressure as a therapeutic schedule to more effectively comply with the rule of human vein blood flow, thereby more effectively realizing anti-thrombus treatment.

The invention relates to a water pumping structure and an air conditioner with the water pumping structure. The water pumping structure comprises a water pumping wheel, a water collection tank, a condenser and a water pumping motor used for driving the water pumping wheel to throw condensate water to the condenser, and further comprises a water spray device. The water pumping wheel is located in the water collection tank. The water spray device is provided with a water inlet and a water outlet. The position of the water outlet corresponds to that of the water pumping wheel, and the water outlet is used for spraying the condensate water to the water pumping wheel. Due to the fact that the water spray device is adopted for spraying the condensate water to the water pumping wheel, a traditional water pumping manner is changed, through the centrifugal atomization principle, the water spray device sprays water to the water pumping wheel, a flat water film on the surface of the water pumping wheel is ruptured into micro water drops, and therefore the atomization efficiency is improved (the size of the water drops is refined), noise is remarkably reduced, and the requirements for the power and the torque of the water pumping motor are greatly reduced.

The invention discloses an elliptical tube H-shaped fin heat exchanger for waste heat recovery. The elliptical tube H-shaped fin heat exchanger comprises an elliptical heat exchange tube, a plurality of groups of H-shaped fins and a heat exchanger surface, wherein the H-shaped fins are sleeved on the surface of the heat exchange tube; the heat exchanger surface consists of non-uniform triangular small wings, which are elliptically arranged, on the surfaces of the H-shaped fins around the elliptical heat exchange tube. When dusty flue gas flows through the surfaces of the H-shaped fins, the small wings disturb the fluid to enhance the heat exchange on the tube wall and the downstream side, and meanwhile, the deposition of particles on the tube wall is reduced; the pressure drop can be reduced by the elliptical tube while the particle adhesion is reduced. A plurality of longitudinal vortexes are arranged in a non-uniform manner; at the front and rear edges of the wing, the size of the small wings and the windward attack angle are larger; on the middle parts of the H-shaped fins, the size of the small wings and the attack angle are smaller; by using the device, the heat exchange surface in different flow states can be enhanced respectively, the heat exchange of the fins are effectively enhanced, the pressure drop is reduced, and the deposition of dust particles in the flue gas on the heat exchange surface is reduced, so that the heat exchanger can operate efficiently for a long time in the dusty flue gas.

The invention relates to a plate type heat pipe with minitype circular channels. The interior of the plate type heat pipe is composed of a group or more than one group of minitype circular channels, wherein each circular channel comprises main channels and a connecting channel which is communicated with two ends of the main channels; the main channels are respectively an evaporation channel and a backflow channel; the connecting channel is respectively a liquid storage chamber and an evaporation chamber; the channels are filled with working media which play a role in phase change and heat transfer at a certain ratio, so that the efficient heat transfer of the heat pipe is realized; and welding, cold compression, hot compression or cementing are adopted for the sealing at each channel opening. The plate type heat pipe provided by the invention has the advantages of low heat resistance, high heat exchange efficiency, light weight, simple structure, high bearing capability and wide application, and ensures that the interface friction shearing force of vapor phase and liquid phase in the channels can be reduced maximally, thus being an efficient and practical novel heat pipe.

The invention discloses a self-circulation gas-liquid two-phase flow phase change heat exchanger. The self-circulation gas-liquid two-phase flow phase change heat exchanger comprises an evaporation plate, a condensation plate, and a wall surface positioned between the evaporation plate and the condensation plate; and a capillary cavity is formed in the wall surface, and is provided with a liquid sucking core and a working medium positioned in the liquid sucking core and with gas and liquid two phases. The self-circulation gas-liquid two-phase flow phase change heat exchanger is characterized in that a groove structure is formed in the inner surface of the evaporation plate; grooves are gradient branched grooves outwards branched and extending in the radial direction from the center; the liquid sucking core is a gradient liquid sucking core with high capillary force in an axis area and low capillary force in a peripheral area; the axis area of the liquid sucking core is aligned to the center of the groove structure to form a main channel of a liquid working medium; and the peripheral area of the liquid sucking core is aligned to the branched grooves of the groove structure to form a main channel of a gaseous working medium. The heat exchanger can effectively improve circulation of gas and liquid working mediums under the condition of anti-gravity, improves the heat transfer performance, and provides guarantee for efficient and reliable operation of electronic devices.

The invention discloses a sewage treatment system and method through a nitrogen and phosphorus removal constant water level sequencing batch activated sludge process, and relates to sewage treatment. The sewage treatment system through the nitrogen and phosphorus removal constant water level sequencing batch activated sludge process comprises a sewage treatment pond, wherein through two hydraulic sails fixed at the bottom and two sidewalls of the sewage treatment pond in a sealed manner, the sewage treatment pond is divided into a biological selection zone, a reaction zone and a water discharging balance zone; a continuous water inlet, a first stirrer and a reaction zone water inlet pump are arranged in the biological selection zone; a water inlet pipe, a flow impeller, an aerating device, a water decanter, a dissolved oxygen online detector and a sludge pump are arranged in the reaction zone; and a second stirrer, a reaction zone water outlet pump and a continuous water outlet are arranged in the water discharging balance zone. Inside of the entire sewage treatment pond runs depending on time sequence cycles; in each cycle, water is continuously fed into the biological selection zone and is continuously discharged out of the water discharging balance zone; and in the reaction zone, water feeding, reaction, precipitation, water discharging, mud discharging and sludge return are sequentially implemented in different time periods of the cycles, and the process is repeated again and again.

The invention discloses a gynecological operation auxiliary device. The gynecological operation auxiliary device comprises a leg support bracket (1) and a leg support pad (2), the leg support pad (2)is arranged on the leg support bracket (1), the leg support bracket (1) is used for being mounted on an operating bed, a leg binding belt (3) is arranged on the leg support pad (2), a sliding sleeve (4) slidably sleeves the leg binding belt (3), an air bag assembly (5) and a pressure sensor (6) are arranged at the sliding sleeve (4), a blood oxygen sensor (7) and a massage assembly (8) are arranged on the leg support pad (2); the air bag assembly (5), the pressure sensor (6), the blood oxygen sensor (7) and the massage assembly (8) are electrically connected with a controller. The device is used for massaging the legs of a patient during an operation, the restraining tightness is reasonable, blood backflow is promoted, lower limb nutrition and oxygen supply are improved, and meanwhile lower limb venous thrombosis is prevented. In addition, the invention further discloses an operating bed.