31results about How to "Reduce tube length" patented technology

The invention discloses an I-shaped tree type cross flow heat exchanger which comprises a heat exchange tube bundle, a shell, a tube box and a tube plate, wherein the tube box and the tube plate are positioned at two sides of the shell; two ends of the heat exchange tube bundle are fixed on the tube plate, and are communicated with the tube box after penetrating through the tube plate; the heat exchange tube bundle is of the I-shaped tree structure; the I-shaped tree structure at least comprises one tree unit structure, wherein each tree unit structure comprises heat exchange tube bundles with two layers of tree structures and tail end communicating pipelines, and the last stage branch ports of the heat exchange tube bundles of the two layers of tree structures are communicated by the tail end communicating pipelines. According to the invention, the shell space is fully utilized, the heat exchange area required by the heat exchange of fluid is increased greatly, the path optimization functions of fluid transportation and energy transmission are realized, the power consumption of a fluid flow pump can be decreased effectively, and the flow heat exchange can be intensified, and the aim of efficient heat exchange and energy conservation is achieved.

An air conditioning system for a vehicle includes a first refrigeration cycle, an expander, and a second refrigeration cycle. The first refrigeration cycle includes a first compressor, a first radiator, a first pressure reducer, an evaporator, and a gas/liquid separator. The expander is disposed on a first fluid communication path between the first radiator and the first pressure reducer. The second refrigeration cycle, which is provided as a cascade cycle, includes a second compressor powered by energy harnessed from adiabatic expansion of the refrigerant at the expander, thereby obviating the need for an additional power source for the second refrigeration cycle. A heat exchanger further is provided on a second fluid communication path in the second refrigeration cycle. The heat exchanger is configured to provide a heat exchange between refrigerant disposed within each of the respective first and second fluid communication paths.

A barometer which is rotatable and a method of using a barometer which is rotatable is presented comprising a barometer tube retaining barometric fluid that is shorter than that required by non-rotatable barometers. The provision of a rotatable barometer allows the use of a barometric fluid of a density lower than that of mercury to be used, thereby enabling the use of mercury to be avoided.

The invention discloses a reactor and reaction system for synthesizing methylbutynol. The reactor comprises a first-stage tubular reactor and a second-stage tubular reactor, which are connected sequentially, wherein each of the first-stage tubular reactor and the second-stage tubular reactor comprises a tubular reactor and a static mixer arranged in the tubular reactor. The reaction system comprises a stirring reaction kettle, a reactor and a termination mixer which are connected in a proper sequence by virtue of pipelines, wherein the reactor adopts the above reactor for synthesizing methylbutynol, a discharge port of the stirring reaction kettle is connected with a feed port of the first-stage tubular reactor, and a discharge port of the second-stage tubular reactor is connected with a feed port of the termination mixer. The reactor and the reaction system for synthesizing methylbutynol, disclosed by the invention, not only greatly shorten the tube pass length of the reactor, but also realize effective mixing of materials, avoid occurrence of side reactions, and greatly improve the product yield in comparison with an early process.

The invention relates to a simplified water beam vaporization cooling system of a steel-rolling stepping heating furnace. The system comprises a stepping beam circulation loop, a fixed beam circulation loop and a water supply loop, wherein the water supply loop comprises an atmospheric thermal deaerator, a deoxidization water tank arranged at the lower part of the atmospheric thermal deaerator, and an electric water supply pump, which is connected in series to a deoxidization downcomer pipe at the lower part of the deoxidization water tank and connected to a steam pocket through a high-pressure water supply pipe, the high-pressure water supply pipe is provided with a high-pressure water supply branch pipe, and a stepping circulation loop downcomer pipe in the stepping beam circulation loop and a fixed circulation loop downcomer pipe in the fixed beam circulation loop are provided with efflux energy transfer devices which are respectively connected to the high-pressure water supply branch pipe. The simplified water beam vaporization cooling system of the steel-rolling stepping heating furnace, which is provided by the invention, integrates the three independent processes of deoxidization, water supply and circulation into a continuous process with low energy consumption to reduce the loading capacity, shorten the power consumption time, and has the advantages of high efficiency and energy saving.

This invention discloses a method for increasing electrochemical Li-storage capacity of carbon nm tubes, which processes the original MWNTS raw material prepared with chemical gas phase deposition method including: first of all, the original MWNTS is supersonic-vibrated, mechanical mixed and dipped under room temperature in different matched volumes of H2SO4 and HNO3 mixed solution, the reacted product is cleaned with deionized water to neutral and put in a tube oven to be heated under 200-500deg.C to be cooled and dipped in Li2CO3 or LiOH solution, the obtained sample is cleaned with deionized water, filtered and dried in vacuum. The gap of quasigraphite layer of the processed MWNTS is expanded, the electrochemical Li capacity is increased.

The invention discloses a dehumidification heat exchange device. The dehumidification heat exchange device comprises an air duct, a surface cooler or an evaporator, a first U-shaped heat pipe heat exchanger and a second U-shaped heat pipe heat exchanger, wherein the air duct comprises an air inlet and an air outlet; the surface cooler or the evaporator is arranged in the air duct, the surface cooler or the evaporator (3) is larger than or equal to 600 mm, and an external pipeline is arranged on one side of the surface cooler or the evaporator; the first U-shaped heat pipe heat exchanger is arranged on one side of the external pipeline of the surface cooler or the evaporator, an interval is formed between the first U-shaped heat pipe heat exchanger and the connecting pipeline of a heat insulation area, and the interval is used for being connected with the outside through an external pipeline of the surface cooler or the evaporator; and the second U-shaped heat pipe heat exchanger and the first U-shaped heat pipe heat exchanger are arranged on the other side of the surface cooler or the evaporator in an opposite installation mode, and the pipe diameter of heat exchange pipelines of the first U-shaped heat pipe heat exchanger and the heat exchange pipeline of the second U-shaped heat pipe heat exchanger is 7.0-9.52mm. According to the dehumidification heat exchange device, the structure of the air duct does not need to be changed, so that the transformation risk is reduced, and the modification cost and period are shortened.

The invention relates to a novel contraceptive cap which relates to the field of sexual products, in particular to a novel contraceptive cap. The cap comprises a latex casing body (1), an elastic ring (2), wherein the elastic ring (2) is arranged at the opening end of the latex casing body (1), the shape of the an elastic ring (2) is similar with the shape of the coronary sulcus of male external genital organs, and the cross section of the elastic ring (2) takes the shape of an oblong oval. The invention adopts the following methods that the pipe length of a condom is reduced and the elastic ring is added through making use of the coronary sulcus of male external genital organs, as the pipe length of the condom is reduced, and a sperm reservoir of the traditional condom, not only the contraception can be achieved, but also the full joy and comfort during sexual intercourse between the sexes.

The invention provides a pipeline, a pipeline system and an air conditioner. The pipeline comprises an electromagnetic valve, a first U-shaped bend connected with the electromagnetic valve, and a second U-shaped bend connected with the electromagnetic valve. The plane where the first U-shaped bend is located and the horizontal plane form a first included angle alpha 1 which is not smaller than 0 degree and smaller than 90 degrees. The plane where the second U-shaped bend is located and the horizontal plane form a second included angle alpha 2 which is not smaller than 30 degrees and smaller than or equal to 90 degrees, and alpha 1 is not equal to alpha 2. According to the pipeline, the pipeline system and the air conditioner, the structure is simple, the cost is low, assembling is convenient, the damping effect is good, the reliability is high, and production efficiency is improved.

Disclosed herein is a panel of a slim cathode ray tube constructed such that the deflection angle of an electron beam is 110 degrees or more. The slim cathode ray tube includes a tube part constituted by joining the panel and a funnel with each other. The panel includes a face part, a side wall disposed around the face part such that the side wall is bent toward the funnel, and a seal edge formed at the side wall, the panel being joined with the funnel at the seal edge. On the assumption that the thickness of the center of the face part is Tc, the thickness of the long side of the seal edge is Tx, the thickness of the short side of the seal edge is Ty, and the thickness of the diagonal part of the seal edge is Td, the panel is constructed such that the following inequalities are satisfied: 0.8≦Tc/Ty≦Tc/Tx≦1.0≦Tc/Td and Td<Tx<Ty, and the side wall has an outer skirt angle of 0.5 to 1.5 degrees.

The invention provides a modular combination spliced-type integrated stove. The modular combination spliced-type integrated stove comprises a frame and a fan module. The frame comprises a U-shaped coaming and a cork base which is connected to the lower side of the U-shaped coaming. The two sides of the U-shaped coaming are each provided with an air outlet. The fan module is embedded into the frameand further comprises an exhaust pipe. According to the smoke exhaustion orientation, the exhaust pipe can communicate with one of the air outlets. According to the modular combination spliced-type integrated stove provided by the invention, the fan module is detachably connected into the frame, the proper air outlets can be selected according to the smoke exhaustion orientation, and therefore the length of the exhaust pipe can be decreased, wind resistance is reduced, and the smoke exhaustion effect is improved; and in addition, the fan module is directly embedded into the frame, the fan module and the frame are arranged in a split mode, disassembling and later-period maintenance of the fan module can be facilitated and maintenance convenience is improved.

A device for metered delivery of a liquid or viscous substance comprising a casing, a reciprocating differential piston able to slide in said casing, a metering chamber and at least one outlet for media delivery, the volume of the metering chamber varying during the piston stroke and comprising an inlet communicating with the outside of the casing via a first non-return valve, said piston comprising a central bore connecting said metering chamber by way of a central bore inlet and said at least one outlet via a passage, said central bore inlet being provided with a second non-return valve, said first non-return valve and second non-return valve being arranged face to face, piston stroke length being able to adjust the volume of the metering chamber.

The invention discloses a novel graphene growth device capable of vertical lifting and rapid cooling. The device comprises an 8-inch quartz tube for CVD (chemical vapor deposition) growth of graphene, a vacuum tube type electric furnace for controlling the CVD growth temperature of the graphene, a lifting frame, a metal bottom plate, two parallel guide rails and other supporting structures. The quartz tube is fixed at the central position of the vacuum tube furnace through a supporting structure. A guide rail and an electric lifting frame are used for controlling horizontal and vertical displacement of the vacuum tube type electric furnace, so that closing and opening of the vacuum tube type electric furnace are automatically controlled. By means of the design, the occupied area of the graphene CVD device can be reduced, and the cooling time in the CVD process is shortened.