121results about How to "Compact and efficient" patented technology

A method and apparatus for liquefying natural gas vapour is provided. Firstly, liquid natural gas is sub-cooled at a first heat exchanger using a liquid coolant such as liquid nitrogen. The sub-cooled liquid natural gas is then used to condense the natural gas vapour at a second heat exchanger.

A treadmill (12) including a support structure and an tread base pivotally mounted to the support structure (18). The tread base (22) having a front portion and a rear portion rotatably coupled together by way of a folding mechanism that allows the rear portion to fold toward the front portion so that lower surfaces of the front and rear portions are substantially adjacent one to another. The folding mechanism can include a means for releasably locking the front portion to the rear portion to create a surface upon which a belt can move and upon which an individual can exercise. The treadmill can include a motion assembly that inclines and declines the tread base, while optionally causing the belt to rotate about two rollers mounted within the front portion and rear portion respectively.

The present invention relates to a new optical component comprising an anisotropic diffuser (5,10) with patterned anisotropy; and means (9, 11, 14, 16, 17, 20, 21, 30, 32) for providing a colourshift observable upon changing viewing angle (6) and/or changing angle of incident light (2). It also relates to methods for making such an optical component and uses of such optical components as security elements with a very high level of security.

A combined domestic hot water supply and space heating system includes a single water heating system, one or more space heating systems and a heated fluid distribution apparatus. The apparatus has piping that provides communication between the apparatus, the water heating system, the space heating system, a fresh water source, and a house tap. The apparatus also includes a by-pass heat exchanger that has a heat source side that communicates with the water heating system, and a space heating system side that communicates with the space heating system.

The invention discloses an electromechanical winch system for aerostat lift-off recycling and a work method. The system comprises a traction winch, a mooring rope storage winch, an auxiliary winch, amooring rope arranging mechanism and a measurement and control system. A dual driving mode is adopted by the traction winch, tension of a tethered mooring rope is released through friction of a capstan and the mooring rope, a protection function on mooring rope arranging is achieved, and the traction winch is a main driving device of lift-off recycling. The mooring rope storage winch is used for storing the mooring rope, and cooperates with the flexible mooring rope arranging mechanism centering on a servo motor to achieve a function of multilayer precise mooring rope arranging. The measuringand control system is used for data collection of the mooring system and the system work state and achieving control over the system. The auxiliary winch is composed of three electric control winches,and has the function of aiding aerostat lift-off and recycling and ground mooring. The electromechanical winch system has the advantages of being reasonable in design, reliable in work and resistantto disturbance, reducing tension and achieving a good multilayer mooring rope arranging function and the like, and is suitable for lift-off recycling work of an aerostat.

The invention discloses a strong automatic fire extinguishing apparatus which comprises a pressure container, a spray nozzle and an alarm display unit; the pressure container is a double-chamber structure; the front end of a first chamber is connected with the spray nozzle in a seal way and the rear end of the first chamber is separated from a second chamber by a one-way pressure valve; the second chamber is provided with a charging valve; a second path of the spray nozzle is equipped with a signal sensor that can automatic detect the reduction of the internal pressure of the pressure container; a third path, a forth path and a fifth path of the spray nozzle are respectively equipped with a pressure display, a pressure relief device and a charging device. The fire extinguishing apparatus of the structure can not only cause a fire extinguishing agent in a cylindrical shell to be sprayed completely, but also can adjust the spraying speed of the fire extinguishing agent so as to cause the fire extinguishing agent to spread sufficiently; meanwhile, on the premise of guaranteeing use effect, the spray nozzle can be arranged towards any direction, thus being greatly convenient for the installation and use of the fire extinguishing apparatus; furthermore, the invention is characterized by compact and effective structure, humanization, automation, high safety, high fire extinguishing efficiency and being convenient for production.

The invention relates to the technical field of chemical products and discloses a constant temperature storage device for preparing 2-methoxypropene. The constant temperature storage device for preparing 2-methoxypropene comprises a box body, and a box cover is arranged on the top of the box body; the outer wall of the box body is fixedly connected with an external threaded pipe; and the inner wall of the box cover is fixedly connected with an internal threaded pipe. According to the constant temperature storage device for preparing 2-methoxypropene, by arranging a sealing groove and a sealingring, the interior of the device can be sealed; by arranging a temperature sensor, the temperature in the device can be known about; by arranging a heating device and a cooler, the temperature in thebox body can be controlled; by arranging an air supply device, the temperature in the box body can be dispersed uniformly; by arranging a vacuum device, the gas pressure in the box body can be controlled, and therefore the box cover can tightly press the box body, and the effect that the sealing performance is more stable is achieved; and by arranging a limiting block, it is prevented that the device is damaged when a square slide groove moves downwards, the structure is compact and effective, work is stable, and use is convenient for a user.

An EGR mixer arrangement for mixing gas into the intake air of a turbocharged internal combustion engine is provided. The arrangement includes an inlet port with connection for a branch pipe, which with an insertion section opens out into the inlet port. The insertion section forms a diffuser vane with a surface which is positively double-bent in the direction of flow of the intake air and which extends in a curved shape in the flow direction of the inlet port.

The invention discloses an efficient compact non-blocking 4*4 waveguide optical switch matrix, which is formed by 6 efficient compact 2*2 Mach-Zehnder optical switches. The six 2*2 optical switches are formed by connecting two cross waveguides and four arc-shaped waveguides; and since the single switch structure and connection mode are symmetric, two-way transmission can be realized. Each 2*2 optical switch is a Mach-Zehnder interferometer structure formed by a micro-nano groove, a total reflection mirror, a phase shift arm and a reference arm, and on-off state of each switch can be changed by adjusting applied voltage value of the phase shift arm; a single-input single-output routing control method of the 4*4 optical switch matrix determines the on-off state of each switch through a table obtained after exhaustion; and according to a designed transmission matrix M44, loss of each transmission mode can be calculated conveniently. The optical switch matrix has the advantages of non-blocking performance, two-way transmission and small occupation area and the like.

The invention discloses a tubular electric field demulsification cyclone separator for oil-water separation. The cyclone separator comprises at least one separation unit. Each separation unit comprises an outer tube, an inner cylinder, a center rod, an intensified cyclone zone and a flow baffle cone, wherein the upper portion of the outer tube is provided with an exhaust port and an oil outlet, the middle of the outer tube is provided with an oil-water mixture inlet, the lower portion of the outer tube is provided with a water outlet, the inner cylinder is coaxially arranged in the outer tube,an annular space is formed between the inner cylinder and the outer tube, the oil-water mixture inlet is communicated with the annular space, the center rod is coaxially arranged in the inner cylinder, the intensified cyclone zone is formed in the annular space, the flow baffle cone is arranged at the position, at the front end of the water outlet, in the outer tube, the flow baffle cone is provided with flow guide holes communicated with the water outlet, the inner cylinder is connected with an external power source through an oil-resistant and explosion-proof wire, and both the outer tube and the center rod are grounded.

The invention discloses a heat exchanger provided with annular slots and used for a sound-energy refrigerating machine, and belongs to the technical field of heat exchangers. The heat exchanger provided with the annular slots and used for the sound-energy refrigerating machine comprises an inner rib body and an inner sleeve. The inner rib body is an annular cylinder with the inner annular surfaceopen towards the outer annular surface. The inner sleeve is arranged in the inner rib body in a sleeved mode and is in interference fit with the inner rib body. The multiple slots are formed in the inner annular surface of the inner rib body at intervals, so that a slot channel allowing air to flow therein is formed between the inner rib body and the inner sleeve. According to the heat exchanger provided with the annular slots and used for the sound-energy refrigerating machine, forced-convection heat change between alternately-flowing working medium gas and the inner wall of the heat exchanger is achieved, and the heat exchange coefficient is large; in the heat conduction direction towards the outside, through interference fit between the inner rib body and the inner sleeve as well as a welding structure of the inner rib body and outer fins, contact heat resistance is eliminated; and in addition, the inner rib body is made of red copper with small heat conduction resistance, and thusthe heat exchanger provided with the annular slots in the hot end has a good cooling effect.

The invention provides a method for realizing an S box in an SM4 algorithm, which comprises the following steps: performing first affine transformation and isomorphic transformation on an input element of the S box in a finite field GF (28) to obtain an element in a composite field; decomposing the inverse multiplication operation of the element in the composite domain into inverse operation and multiplication operation on GF (24), performing inverse operation on GF (24) on a polynomial ring base, and performing multiplication operation on GF (24) on a redundant representation base to obtain an inverse element on the composite domain; and performing inverse isomorphic transformation and second affine transformation on the inverse element in the composite domain to obtain an output result of the S box. Calculation of the S box is carried out on the basis of corresponding high efficiency, so that the structure of the S box is more compact and efficient, and the circuit area and time delay of the S box in the SM4 algorithm are further reduced.

The invention discloses a micro-displacement amplification and conversion device. The micro-displacement amplification and conversion device comprises a base (1), a micro-displacement amplification mechanism (2) and an intelligent material driver (8) and also comprises a slight zero adjustment mechanism (3), a pre-tightening adjustment mechanism (4), a linear bearing (5), a displacement conversion mechanism (6) and an output shaft (7), wherein the micro-displacement amplification mechanism (2) is used for amplifying micro-displacement generated by the intelligent material driver (8) according to a lever principle and structural elastic deformation, the displacement conversion mechanism (6) is used for converting linear displacement output from the micro-displacement amplification mechanism (2) into angular displacement to be transferred to the output shaft (7) through a key under the joint effects of a transmission rod (15), a flexible hinge (16), a connection rod (17) and an eccentric wheel (18), and the pre-tightening adjustment mechanism (4) and the micro-displacement amplification mechanism (2) are jointly used for applying pre-tightening force onto the intelligent material driver (8). The micro-displacement amplification and conversion device adopts an integrated design and is compact and high-efficiency in structure, and the function is full and simple.