69results about How to "Improve heat transfer uniformity" patented technology

The invention provides a vapor-liquid two-phase flow tube shell type heat exchanger. The heat exchanger comprises a shell, wherein sealing heads are arranged at two ends of the shell respectively; tube plates are arranged in connection positions between the sealing heads and the shell; heat exchange tubes are connected with the tube plates at two ends; vapor phase in vapor-liquid two-phase flow can be condensed into liquid phase in the heat exchange process; the vapor-liquid two-phase flow flows in a tube process; separation devices used for decreasing vibration and reducing noise are arranged in the heat exchange tubes; a plurality of separation devices are arranged in the same heat exchange tube; the length of the separation devices is gradually reduced along the flowing direction of flow in the heat exchange tubes. According to the vapor-liquid two-phase flow tube shell type heat exchanger, the vibration of the tubes can be decreased to a maximum extent due to the length change of the separation devices when the vapor-liquid two-phase flow flows in the tubes; the noise level is reduced; meanwhile, the flowing resistance is reduced; the heat exchange uniformity is improved.

The invention relates to a mold powder capable of effectively controlling peritectic steel thick slab narrow face depression defect. The mold powder comprises the following elements by weight percent: 38.02 to 40.1 percent of Cao, 28.8 to 30.02 percent of SiO2, 9.9 to 10.5 percent of CaF2, 9.06 to 9.5 percent of Na2O, 1.55 to 1.93 percent of MgO, 1.5 to 1.93 percent of AL203, 0.01 to 0.037 percent of Li2O and 0.035 to 0.053 percent of MnO. The mold powder has good lubricating property and spreadability. Because of the high melting speed, the invention can complement the quick consumption of liquid slag in time; because of the high alkalinity, the invention has strong absorbing and mixing capability; and because of the proper viscosity and the reasonable crystallization temperature, the invention plays an important role in uniformity. When the mold powder is applied to the casting of peritectic steel thick slab, the slag entrapment defect caused by crystallizer liquid level fluctuation is reduced greatly, the heat transmission uniformity is improved greatly and the surface quality of casting blank is good.

The invention relates to the technical field of evaporation equipment, and discloses an evaporation source device for an evaporator and the evaporator. The evaporation source device for evaporator provided by the invention comprises a crucible; the crucible slot of the crucible is provided with at least one first conductive clapboard along a first direction, and each of the first conductive clapboard is connected with the crucible wall; and the crucible slot is provided with at least one second conductive clapboard fixedly connected with the first conductive clapboard along a second direction, and each of the second conductive clapboard is connected with the crucible wall. The technical scheme provided by the invention can shorten the heat transfer path in an evaporation material, realize even transfer of heat in the evaporation material, and further improve the thermal stability of the organic material evaporation, thereby maintaining stability of plating rate and improving the yield rate of the organic material evaporation.

The invention discloses a wing-shaped pipe type adsorption column for a polycrystalline silicon tail gas recovery system. The wing-shaped pipe type adsorption column comprises an adsorption column body and a tracing tube, wherein the tracing tube is mounted on the outer casing wall of the adsorption column body; backflow sleeves are mounted in the adsorption column body through supporting plates; each backflow sleeve comprises an outer pipe and an inner pipe; each inner pipe is positioned inside the corresponding outer pipe; a cavity between the outer side wall of each inner pipe and the inner side wall of the corresponding outer pipe serves as a medium passage; a sealing cap for enabling medium to flow back is mounted at the top of each outer pipe; a plurality of fins are mounted on the outer side wall of each outer pipe; an adsorbent filling opening and a hydrogen outlet are also formed in the top of the adsorption column body; an adsorbent discharging opening is formed in the bottom of the adsorption column body; a main hydrogen pipe and a plurality of groups of hydrogen inlet branch pipes are also mounted on the side wall of the bottom of the adsorption column body; the hydrogen inlet branch pipes are connected with the main hydrogen pipe. The wing-shaped pipe type adsorption column has the benefits that the heat exchange efficiency is high; heating is uniform; the production cost is reduced; equipment safety and reliability are improved.

The invention discloses a microchannel heat sink having the special shunting structure. The heat sink comprises a shunting module and a uniform heating base plate which is arranged above the shuntingmodule and directly contacts with heat release equipment, wherein the shunting module comprises a main in-flow channel, a shunting sub channel, an overflow channel, an out-flow sub channel and a mainout-flow channel, the cooling working medium enters the heat sink from the main in-flow channel, the main in-flow channel employs the cross section tapered structure, the cooling working medium is guaranteed to distribute to each shunting sub channel, the overflow channel is formed through directly processing on a solid wall surface of the shunting sub channel, through inclination arrangement, theoverflow channel and the shunting sub channel are made to form a relatively small incident flow angle, so flow resistance is reduced. Along the main flow direction in the shunting sub channel, heightof the overflow channel is gradually reduced, the cross section tapered structure is employed at the shunting sub channel, the excessive cooling work medium can be prevented from flowing to the downstream overflow channel of the sub channels, flow distribution in the whole heat sink is made to be uniform, and heat exchange uniformity of the heat sink is guaranteed. The method is advantaged in that through the special shunting structure and the overflow channel structure, the distribution process in the heat sink is made to be uniform, and integral heat exchange efficiency and heat exchange uniformity of the heat sink are improved.

The invention discloses an air conditioning system for a computer room. The air conditioning system for the computer room comprises an indoor unit and an outdoor unit set placed outside the computer room. The indoor unit is placed in a cabinet chamber and comprises a machine shell. The machine shell comprises a front door plate and a rear door plate, an upper plate and a lower plate, a left side plate and a right side plate which are arranged oppositely respectively. The rear door plate is provided with an air inlet. The front door plate is provided with an air outlet. The indoor unit further comprises a heat exchanger and cross-flow blowers. The heat exchanger is arranged in the machine shell. The cross-flow blowers are located on the side close to the front door plate. The cross-flow blowers comprise cross-flow fans, driving motors, volutes and volute tongues. The driving motors drive the cross-flow fans. Air passages are formed by the volutes and the volute tongues. The driving motors are installed on the upper plate and/or the lower plate. The volutes and the volute tongues are installed on the machine shell. According to the air conditioning system for the computer room, the technical problems that an existing air conditioning system for a computer room is too high in energy consumption and big in noise are solved. The air conditioning system for the computer room is specifically suitable for various large-scale data computer rooms.

The invention discloses refrigeration equipment and a heat exchange assembly for the refrigeration equipment. The refrigeration equipment comprises a shell and the heat exchange assembly. The heat exchange assembly comprises a flow split heat exchanger, a close-to-ventilation-opening heat exchanger, a away-from-ventilation-opening heat exchanger, a first communication pipe and a second communication pipe, wherein the flow split heat exchanger is provided with a close-to-ventilation-opening portion adjacent to a ventilation opening and a away-from-ventilation-opening portion away from the ventilation opening; the close-to-ventilation-opening heat exchanger is provided with a close-to-ventilation-opening heat exchanger inlet and a close-to-ventilation-opening heat exchanger outlet; the away-from-ventilation-opening heat exchanger is provided with a away-from-ventilation-opening heat exchanger inlet and a away-from-ventilation-opening heat exchanger outlet; the two ends of the first communication pipe are communicated with a away-from-ventilation-opening portion outlet and a close-to-ventilation-opening heat exchanger inlet to lead refrigerants flowing out of the away-from-ventilation-opening portion outlet into the close-to-ventilation-opening heat exchanger; the two ends of the second communication pipe are communicated with a close-to-ventilation-opening portion outlet and the away-from-ventilation-opening heat exchanger inlet to lead refrigerants flowing out of the close-to-ventilation-opening portion outlet into the away-from-ventilation-opening heat exchanger. The heat exchange assembly of the refrigeration equipment is even in heat exchange.

The invention provides a heat exchange device and air-conditioning equipment. The heat exchange device comprises at least two subsidiary heat exchangers arranged in the wind direction; each subsidiaryheat exchanger comprises at least one row of refrigerant pipes and fins mounted on the refrigerant pipes in a sleeving manner; and the transverse pipe center distance of the refrigerant pipes betweenany two adjacent subsidiary heat exchangers ranges from 8 mm to 35 mm. According to the heat exchange device provided in the scheme, an air flow can extend fully and smoothly when flowing among the refrigerant pipes of the adjacent subsidiary heat exchangers, air flow blind zones and weak wind zones on the leeward sides of the refrigerant pipes can be reduced, all the refrigerant pipes in the subsidiary heat exchangers in the upstream and downstream positions of the wind direction can make full contact with the air flow, the problem that the refrigerant pipes in the subsidiary heat exchangersin the downstream position of the wind direction cannot exchange heat effectively due to the fact that the refrigerant pipes are located in the air flow blind zones or the weak wind zones is avoided,the problem that the wind force on the subsidiary heat exchangers in the downstream position of the wind direction is greatly reduced due to the excessively large transverse pipe center distances ofthe refrigerant pipes between among any subsidiary heat exchangers can also be avoided with the design, and the overall energy efficiency ratio of the air-conditioning equipment is increased.

The invention discloses a wound tube heat exchanger with baffle plates. The wound tube heat exchanger comprises a shell, wherein a multi-section spiral wound heat exchange tube is arranged in the shell, and the multi-section spiral wound heat exchange tube is formed by winding a plurality of spiral wound tube sections and a plurality of straight tube sections alternately; a plurality of combined baffle plates are respectively arranged between the straight tube sections and the shell and are vertically arranged along the axis of the shell; and the two ends of the shell are further respectivelyprovided with tube sheets, and the shell is divided into a tube-side heat exchange area and a shell-side heat exchange area. By means of the wound tube heat exchanger with the baffle plates, through the improvement of the structure, the baffle plates can be effectively and conveniently installed on the multi-section spiral wound heat exchange tube, so that a dead zone of shell-side flow is effectively eliminated, the disturbance of shell-side fluid is enhanced, the fluid heat exchange process is prolonged, the shell-side heat transfer is finally enhanced, consumables and energy sources are saved, the integral heat exchange uniformity of the heat exchanger is improved, and the practicability is high.

The invention discloses a wall mounted air conditioning indoor unit, comprising a shell, as well as an evaporator and a tangential fan that are arranged in the shell. The evaporator comprises at least two folds, wherein an angle is formed between a first fold evaporator and a second fold evaporator. The shell is provided with a grating part thereon, and the grating part is provided with a plurality of air inlets which are respectively inclined to the middle part of the grating part. The wall mounted air conditioning indoor unit can balance the air velocity of the evaporator and overcomes the problem that the heat exchange uniformity of the evaporator is poor, thus improving the heat exchange capacity of the evaporator as well as the overall heat exchange effect of the evaporator.

The invention relates to a multi-heat exchanger series transcritical CO2 heat pump heating system which comprises a first compressor, a first air cooler, a second air cooler, a cooling evaporator, a first throttling device, a low-temperature evaporator, a second compressor, a condenser and a second throttling device. The first compressor, a refrigerant channel of the first air cooler, a refrigerant channel of the second air cooler, one refrigerant channel of the cooling evaporator, the first throttling device and a refrigerant channel of the low-temperature evaporator are sequentially connected through a pipeline to form CO2 transcritical circulation loop. The second compressor, a refrigerant channel of the condenser, the second throttling device and the other refrigerant channel of the cooling evaporator are sequentially connected through a pipeline to form an auxiliary circulation loop. A secondary refrigerant channel of the second air cooler, a secondary refrigerant channel of the condenser and a secondary refrigerant channel of the first air cooler are connected through a pipeline form a water supply flow path. According to the system, the heat exchange uniformity can be improved, and the overall energy efficiency of the CO2 heat pump heating system is improved.

The application provides an evaporator and an air conditioning unit. According to the evaporator, a first heat exchange tube set and a second heat exchange tube set are arranged in a casing; the second heat exchange tube set is located below a liquid distributor; a first liquid uniformizing tube set is arranged in the casing and is located between the first heat exchange tube set and the second heat exchange tube set; the tube diameter of heat exchange tubes of the first liquid uniformizing tube set is smaller than that of heat exchange tubes of the first heat exchange tube set; and the distribution density of the heat exchange tubes of the first liquid uniformizing tube set is larger than that of the heat exchange tubes of the first heat exchange tube set. By applying the technical scheme, after a refrigerant flows through the first heat exchange tube set, the refrigerant will fall on the first liquid uniformizing tube set. When the refrigerant flows through the first liquid uniformizing tube set, the refrigerant is randomly distributed uniformly through the heat exchange tubes of the first liquid uniformizing tube set, thus, the refrigerant can be re-uniformized again, and the refrigerant can uniformly fall on the second heat exchange tube set. In this way, heat exchange uniformity is of the evaporator is improved, and the overall heat exchange efficiency is improved.

The invention relates to a flow equalizing hot blast heater with premix air flow nozzle interconnection and air supply flow curved flowing. A combustor wall body is connected with a burner wall body; the burner wall body is supported on a regenerative chamber wall body; the upper part and the middle part of the regenerative chamber wall body are inserted into a burner; a gas inlet pipe and an air inlet pipe on the burner wall body are connected to a gas distribution circuit and an air distribution circuit; a gas main nozzle and an air main nozzle on the gas distribution circuit and the air distribution circuit are communicated with an air flow premixing nozzle passage; a premixing air adjusting nozzle is arranged at the top of the air flow premixing nozzle passage; a communication passage is arranged on the air flow premixing nozzle passage; a hot air outlet pipe is arranged on the combustor wall body; the lower part of the regenerative chamber is built on the hot blast heater bottom in a masonry manner; a casting grate is arranged on support columns at the hot blast heater bottom; a heat accumulator is arranged on the casting grate; a flue gas outlet pipe and a cold air inlet pipe are arranged on the regenerative chamber wall body at the lower part of the casting grate. The flow equalizing hot blast heater has the advantages of high efficiency, high heat strength and high air supply temperature, saves fuel, and reduces waste gas temperature and the emission of harmful gas.

The invention relates to a heat storage body gas and air swirl entrainment pre-mixing combustion hot-blast stove. The hot-blast stove solves the problems of low mixing rate, non-uniform mixing effects, and low intensity, low temperature and incomplete combustion. A sleeve-type heat storage block is arranged in the wall of a combustion chamber, a gas inlet pipe at the lower part is connected to a gas distribution circuit, a gas main nozzle of the gas distribution circuit is communicated with a gas adjustment nozzle, the gas adjustment nozzle is connected to the bottom of a gas mixing circuit, the top of the gas mixing circuit is provided with an annular adjustment baffle plate, an air inlet pipe of the wall of an air mixing chamber at the top is connected to an air distribution circuit, the air distribution circuit is provided with an air distribution nozzle, the bottom of the air mixing chamber is provided with an air nozzle, the wall is provided with a hot air outlet pipe, the wall of a heat storage chamber is sleeved by the wall of the combustion chamber and is built on the stove bottom, support columns on the stove bottom are provided with a grate, the heat storage block is arranged on the grate, and the lower part of the grate is provided with a flue gas outlet pipe and a cold air inlet pipe. The hot-blast stove has the advantages of uniform mixing, high combustion intensity, uniform air-flow distribution, good heat transfer uniformity and high heat utilization rate.

The invention relates to a vertical type rapid heating device for euphausia superba. The vertical type rapid heating device for euphausia superba comprises a porous steam inlet tube, wherein a springis disposed in the porous steam inlet tube. The lower end of the spring is fixed inside the porous steam inlet tube, and the upper end of the spring can be compressed downward, and is fixedly connected with a steam volume control cap. A snap spring for a hole is disposed on the upper end of the steam volume control cap to limit a highest position of the steam volume control cap. Multiple sets of through-holes are disposed at different heights in the side wall of the porous steam inlet tube. Vertical type spiral scrapers are disposed in a shell. The upper end of the porous steam inlet tube protrudes out of the shell and serves as a steam inlet. The space between the upper end of the shell and the porous steam inlet tube is closed, and the lower end of the shell is a euphausia discharge port. The vertical type spiral scrapers are connected to the output shaft of a frequency conversion motor through a transmission mechanism, and the vertical type spiral scrapers are driven to rotate by the frequency conversion motor. The device has the advantages of fast heating speed, instantaneous killing of microorganisms in euphausia superba at high temperature, short duration of high temperature,less damage to nutrients in materials, and high nutrient retention rate. The device has a simple structure, occupies a small space, and is easy to implement.

The invention relates to a rib layer plate cooling structure with slits for a combustion chamber of a turbofan engine, which is characterized in that a plurality of high-blockage-ratio annular ribs are arranged on the surface, positioned in an impact airflow cooling channel, of an air film pore plate along the airflow direction, and the plurality of high-blockage-ratio annular ribs are parallel to one another; at least two contraction or expansion slits used for improving heat exchange uniformity are formed in the high-blocking-ratio annular fin in the cooling airflow direction, and the at least two contraction or expansion slits are formed in the high-blocking-ratio annular fin at intervals. After the contraction/expansion type slit ribs are arranged on the wall surface of the impact target plate, the heat transfer performance of a low heat transfer area between impact jet flow areas on the impact target plate in traditional impact cooling is improved, so that the heat transfer uniformity of the wall surface of the impact target plate is improved.

The invention discloses a preparation method of a carbon tube coated magnetic material and a magnetic oriented heat conduction material. The preparation method of the carbon tube coated magnetic material comprises the following steps: S1, respectively dissolving a cobalt source and 2-methylimidazole in methanol for mixing, then enabling them to react to obtain a mixed solution C, carrying out solid-liquid separation on the mixed solution C to obtain a precipitate, and drying the precipitate to obtain a framework material; S2, calcining the framework material for the first time under a hydrogenand argon mixed atmosphere to obtain an intermediate material; S3, calcining the intermediate material for the second time under an air atmosphere to prepare the carbon tube coated magnetic material.The carbon tube coated magnetic material prepared by the preparation method has higher magnetic stability, good magnetic response effect, better heat transfer uniformity and higher heat transfer speed. In addition, under the action of an external magnetic field, a heat conduction channel consistent with the heat conduction direction can be formed, so that the heat transfer efficiency of the heatconduction material is improved.

The invention discloses continuous casting crystallizer casting powder for 310S stainless steel. The continuous casting crystallizer casting powder is prepared from the chemical components in percentage by weight: 29%-34% of SiO2, 34%-40% of CaO, 1.2%-3% of Li2O, 5%-10% of Al2O3, 7%-12% of Na2O, 7.5%-11% of F<->, 0-2% of Fe2O3, 2%-4% of free carbon and the balance of trace elements. The casting powder is high in heat transfer uniformity, good in lubrication effect, stable in slag layer and uniform in melting, the non-clearing rate of the surfaces of cast 310S stainless steel casting blanks is99% or above, and the subsurface and interior quality of the casting blanks is good.

The invention discloses an integrated multi-connected high-temperature air conditioning unit with a fresh air handling function. The whole unit is composed of a refrigeration system, and comprises anoutdoor unit, one or more indoor units and an outdoor fresh air handler, an air pipe connecting port and a liquid pipe connecting port are formed in each of cases of the outdoor unit, the indoor unitsand the outdoor fresh air handler, the air pipe connecting port of the outdoor unit, the air pipe connecting port of the outdoor fresh air handler and the air pipe connecting ports of the plurality of indoor units communicate with one another, and the liquid pipe connecting port of the outdoor unit, the liquid pipe connecting port of the outdoor fresh air handler and the liquid pipe connecting ports of the plurality of indoor units communicate with one another. According to the integrated multi-connected high-temperature air conditioning unit with the fresh air handling function, both returnair and fresh air can be handled at the same time, additional fresh air handling units are not needed for cooperation, and the advantages of flexible installation and small occupied area of a multi-connected air conditioning unit are reserved.

The invention discloses a film type tube row falling film evaporation tube bundle. The film type tube row falling film evaporation tube bundle comprises a plurality of heat exchange tubes and flow guide plates; the heat exchange pipes are horizontally arranged; the plurality of heat exchange pipes are arranged in a row in parallel; the top faces and the bottom faces of the adjacent heat exchange pipes are connected through the flow guide plates; the long edges of the flow guide plates make contact with the heat exchange pipes; the short edges of the flow guide plates are vertically arranged; the flow guide plates are arranged at the bottom of the lowest heat exchange pipe; and the flow guide plates and the heat exchange pipes are made of the same material. The liquid film can completely cover the surfaces of the heat exchange tubes, and drying is avoided.

The invention discloses an intercooler of an automobile supercharged engine. The intercooler comprises an air inlet structure, a core body and an air outlet structure, the core body is arranged between the air inlet structure and the air outlet structure and communicates with the air inlet structure and the air outlet structure, the air inlet structure comprises an inlet pipe and an air inlet chamber which communicate with each other, and a flow guide plate is arranged in the air inlet structure. One part of the flow guide plate is located in the inlet pipe, the other part of the flow guide plate is located in the air inlet chamber, and the flow guide plate is of an integrally formed structure and comprises an arc-shaped plate, a vertical straight plate connected with one end of the arc-shaped plate and a horizontal straight plate connected with the other end of the arc-shaped plate. According to the intercooler, the heat exchange effect of the core body can be improved, and the phenomenon that the intercooler is frozen is avoided.

The invention discloses an anti-freezing saturated wet tail gas condensation dehumidification device and method. The device comprises a dehumidification tower and an anti-freezing assembly. The dehumidification tower comprises a tower body, a moisture inlet is formed in the bottom or side wall of the tower body, an exhaust port is formed in the top, dehumidification layers are arranged in the tower body and located above the moisture inlet layer by layer in the smoke flow direction, a plurality of heat exchange modules are arranged in each dehumidification layer, each heat exchange module comprises a plurality of heat exchange membranes which are bonded in sequence, a hot flow channel and a cold flow channel which are distributed by the heat exchange membranes at intervals and are vertically communicated with each other are formed in the heat exchange module, the anti-freezing assembly comprises a preheating air collecting cover and a preheating fan, the preheating air collecting coveris located in the space above the top dehumidification layer, an air inlet of the preheating fan is connected with the preheating air collecting cover through a pipeline, and an air outlet of the preheating fan is connected to the position below a cold flow channel inlet of the heat exchange module in the bottom dehumidification layer through a pipeline. Water resources in the high-humidity fluegas can be effectively recycled, the phenomenon that the high-humidity flue gas discharges white mist is eliminated, and the operation stability of the dehumidification system in winter can be improved.