32results about How to "Reduce emission noise" patented technology

An optoelectronic substrate comprises an electronic device, an optical device, and an optical wiring layer, the optical wiring layer comprising a photonic crystal. An optoelectronic substrate comprises an electronic device, an optical device, and an optical wiring layer, wherein the optical wiring layer is comprised of a periodic structure having a repeating period nearly equal to or smaller than the wavelength of light employed for signal transmission. An optoelectronic substrate comprises an electronic device, an optical device, an electric wiring connected to the electronic device, an optical wiring layer, and a base plate, wherein the optical wiring layer is employed as an insulating layer between the base plate and the electric wiring.

An electromagnetic valve driving apparatus is provided for reducing emission noise generated when a discharge switching element is turned off. In the apparatus, a discharging capacitor stores electrical energy for performing discharge to a coil in an electromagnetic valve and charging means generates voltage from a power source voltage, which voltage is higher than that of the power source voltage. A discharge switching element is provided in series in a current path extending from the discharging capacitor to an up-stream side terminal of the coil. Controlling means turns on/off the discharge switching element. Circulating means is provided in the current path for circulation of current to the coil. Sub-discharging means is provided in the current path, for starting discharge to the coil when the discharge switching element is turned off, and for circulating current to the coil through the circulating means when the discharge to the coil is completed.

The invention provides an energy-saving environment-friendly layout of a large-scale routine hypersonic wind tunnel. The system comprises a gas tank, a heater, a stabilization segment, a jet pipe, a test segment, an ultra-expanding segment and a heat exchanger, wherein the stabilization segment, the jet pipe, the test segment and the ultra-expanding segment are successively connected to form a major test wind tunnel assembly, the heat exchanger comprises an intermediate channel and a peripheral channel encircling the intermediate channel, an outlet of the ultra-expanding segment communicates with the intermediate channel of the heat exchanger, the gas tank communicates with the peripheral channel of the heat exchanger, and high-pressure gas in the gas tank is sent into the heater via the peripheral channel of the heat exchanger by means of a gas pipeline, then is sent into the stabilization segment after passing through the heater and is discharged through flowing through the intermediate channel of the heat exchanger after being tested in the major assembly of a test wind tunnel. According to the invention, energy consumption is reduced, the operation cost is decreased, at the same time, the influence on the environment is reduced, and the problems of large exhaust noise and waste of afterheat of a conventional hypersonic wind tunnel can be solved.

A method of operating a fuel injector having a piezoelectric actuator operable by applying a drive pulse thereto, wherein the drive pulse has a frequency domain signature. The method includes i) determining at least one resonant frequency of an injector installation in which the injector is received, in use, and ii) modifying the drive pulse such that a maximum of the frequency domain signature thereof is remote from the determined resonant frequency of the injector installation.

The invention discloses a tail gas warming device of a motor bicycle and warming clothing applied to the same. The tail gas warming device comprises a heat exchanger and a fan. An air outlet of the fan is connected onto an air inlet of the heat exchanger through an air guide pipe, an air outlet of the heat exchanger is connected with an air outlet connector through the air guide pipe, an exhaust front pipe is connected at the position of an engine tail gas outlet of the motor bicycle, the tail end of the exhaust front pipe is connected with one inlet of the three-way flow dividing valve, and the other two outlets of the three-way flow dividing valve are respectively connected onto an exhaust tail pipe and a branch gas tail pipe. The tail end of the branch gas front pipe is connected onto a hot fluid inlet of the heat exchanger, and a branch gas back pipe is connected with a hot fluid outlet of the heat exchanger. An adjusting device used for poking and rotating a valve switch is arranged on the three-way flow dividing valve. The warming temperature of the tail gas warming device can be adjusted simply by the gas flow degree of the three-way flow dividing valve to enable a human body to obtain optimum warming temperature. Therefore, adaptability of the tail gas warming device is expanded, and the tail gas warming device overcomes the shortcoming in the prior art that the warming device is wasted and left unused for most time.

The invention relates to a reverse thrust seat for rocket launching. The reverse thrust seat comprises a bottom (1), a wall (2), a round hole (3) or a sawtooth hole (4), a cavity (5) and a cylinder (7). The wall (2) and the bottom (1) of the cylinder (7) of the reverse thrust seat (11) is hermetically connected to form the cavity (5). The lower end of a rocket (8) is placed in the horizontal reverse thrust seat (11). The rocket (8) is coaxially arranged on the reverse thrust seat (11). Piles, arranged on the lower surface of the reverse thrust seat (11) and fixed to the reverse thrust seat (11), extend into the horizontal ground, and are clung to the ground. A cover seat (13) is arranged at the periphery of the lower end of the rocket, and is used for preventing hot air flow (9) from burning the rocket (8) out. Kinetic energy of the high-pressure hot air flow (9), emitted to the surrounding by the rocket (8) and sprayed horizontally, is collected by the reverse thrust seat (11) with the wall (2), is stored in the cavity (5), and is converted into energy for thrusting the rocket up, so that more energy is saved, and the weight of the rocket can be reduced.

The invention relates to the technical field of combustors, in particular to a combustor fire grate, a combustor and a water heater. The combustor fire grate comprises a premixing cavity, wherein thefire outlet end of the premixing cavity is provided with a fire outlet face, the fire outlet face is provided with fire outlet holes, the fire outlet holes comprise a plurality of main fire holes anda plurality of auxiliary fire holes, all the main fire holes are arranged in parallel, and the auxiliary fire holes are formed between every two adjacent main fire holes among part or all of the mainfire holes. According to the combustor, the auxiliary fire holes are formed between every two adjacent main fire holes in the fire outlet face 2-3 of the unique premixing cavity, so that the main fireholes and the auxiliary fire holes are basically formed alternately, good fire transferring and flame stabilizing performance is achieved, combustion noise is lowered, the combustion discharge amountis reduced, better performance experience is brought to consumers, the using comfort of the water heater is improved, moreover, the emission of carbon monoxide can be effectively reduced, and the usesafety of the water heater is improved.

A power supply apparatus is disclosed to provide power to a plurality of electrical components inside a computer housing. The power supply apparatus comprises a power supply module to convert electrical power to at least one power level. At least one power distribution panel is disposed within the computer housing. At least one wiring harness is electrically coupled at a first end of the at least one wiring harness to the at least one power distribution panel. The at least one wiring harness at a second end connects to the power supply module to transfer the at least one power level to the at least one power distribution panel. The at least one power distribution panel provides electrical adapters to transfer the at least one power level to cables that are coupled between the electrical adaptors and the plurality of electrical components.

The invention provides a vehicle-mounted tail gas temperature difference power generation heat exchanger. The heat exchanger comprises a mounting base body. A device having the SCR function and a device having the noise reduction function are integrated into the mounting base body at the same time so that heat energy in high-temperature tail gas of an automobile engine can be recycled; and meanwhile, in the heat exchange process of the heat exchanger, compatibility between an automobile tail gas temperature difference power generation system and a tail gas emission system is improved. By means of the vehicle-mounted tail gas temperature difference power generation heat exchanger, the SCR function and the noise reduction function can be integrated; the problem that multiple devices are in tandem arrangement in the link of tail gas treatment is thoroughly solved; the integration degree is high; arrangement is easy to conduct; and a temperature difference power generation device can be applied to a commercial vehicle conveniently.

The invention discloses a multistage pressure control complex muffler. A restriction orifice plate is arranged at the lower end of an inner cavity of a main manifold in a casing; a plurality of roundholes are spread on the wall part of the main manifold from top to bottom to form a second-stage pressure control structure; multiple layers of pressure control cylinders are coaxially arranged and are fixedly connected with the outer part of the main manifold; a plurality of round through holes are distributed on the wall of the pressure control cylinder of each layer from top to bottom; the round through holes in the walls of two adjacent layers of pressure control cylinders are staggered distributed in a spaced manner; a second manifold is arranged in the casing to form a fourth-stage pressure control structure; large pressure drop exhausted by an atmosphere exhaust opening is dispersed to bear, so that air current discharged from the atmosphere exhaust opening is changed from pressurejump evacuation into pressure gradient evacuation, and further strong jet noise produced by large pressure drop exhaust is avoided; gas is jetted from small holes and is assisted with a resistance sound absorber for further absorbing sound, the internal pressure drop process of equipment can be controlled, atmospheric emission noise is reduced, the noise spectrum quality is improved, and a noise pollution control goal is achieved; the multistage pressure control complex muffler meets the use requirements of an atmospheric exhaust regulating valve for nuclear power on high pressure and mass flow and has good muffling effect.

The invention provides a floating valve tower cleaning system and method, and the floating valve tower cleaning system comprises a floating valve tower, a first pipeline, a regulating valve group, a gas phase outlet valve, a safety valve group, a silencing valve group, a steam reboiling mechanism, a cooling mechanism, a second pipeline and a nitrogen mechanism, the first pipeline is connected with the top of the floating valve tower through a pipeline by virtue of the adjusting valve group, the gas phase outlet valve is connected with the top of the floating valve tower through a pipeline, and the safety valve group is connected with the pipeline between the gas phase outlet valve and the floating valve tower through a pipeline; the noise reduction valve group is connected with a pipeline between the gas phase outlet valve and the safety valve group through a pipeline, the steam reboiling mechanism and the cooling mechanism are respectively connected with the bottom of the float valve tower through pipelines, the second pipeline is connected with the middle of the float valve tower, and the nitrogen mechanism is connected to the second pipeline.

A normal temperature and low temperature flammable and explosive medium emptying device comprises a concrete foundation (1), a profile steel support (2), a collecting box (3) and an emptying cylinderassembly (4); the profile steel support (2) is fixed on the concrete foundation (1); the collecting box (3) is fixed on the profile steel support (2); the emptying cylinder assembly (4) is fixed on the collecting box (3); the emptying cylinder assembly (4) comprises an emptying cylinder (41), a shock tube structure (42), a medium discharge port (43), a nitrogen mixing port (44) and a silencing device (45); and after a liquid or gas flammable and explosive medium enters from the medium discharge port (43), the gas flammable and explosive medium and nitrogen gas entering from the nitrogen mixingport (44) are mixed and then discharged from the silencing device (45), and the liquid flammable and explosive medium passes through the shock tube structure (42), then enters the collecting box (3),becomes a gas flammable and explosive medium after absorbing heat in the collecting box (3) and then is mixed with nitrogen gas entering from the nitrogen mixing port (44) and discharged from the silencing device (45).