60results about How to "Reduce output capacity" patented technology

The invention relates to an air holding device comprising a channel system raised from a suction opening disposed at a height of a workstation generating dirty air or vapours and leading to at least one outlet opening. An exhausting fan is placed between a prefilter and at least one odour filter. The channel system is embodied in the form of an exhaust air box disposed downstream of the exhaust fan. The lateral surface of the exhaust air box comprises an air inlet which is connected to the downstream side of the exhausting fan. The other lateral surfaces are selectively provided with air outlet openings covered respectively with an odour filter having an adjustable air resistance. Said odour filter preferably consists of a foam material coated with active carbon and the air resistance thereof is selectable according the thickness and/or porosity of the foam material.

The present invention provides a fuel cell having a layered structure, including: a membrane electrode assembly having a fuel electrode, an oxidation electrode, and an electrolyte membrane held between the fuel electrode and the oxidation electrode; and stainless steel separators holding the membrane electrode assembly therebetween. The stainless steel separator contains Cr and Fe; the Cr concentration by mass % by mass ratio of Cr to Fe at the separator surface facing the fuel electrode is from 0.7 to 1.3; and the Cr concentration by mass % by mass ratio of Cr to Fe at the separator surface facing the oxidation electrode is less than 0.7.

A semiconductor integrated circuit with stabilizing capacity has a voltage drop circuit that drops a power supply voltage to a first voltage Vcc1 and supplies the Vcc1 to a plurality of function blocks; a stabilizing capacity that stabilizes the Vcc1; and a plurality of voltage switching circuits each of which is provided in each of the function blocks and selectively switches between the Vcc1 and a base voltage Vss to produce a second voltage Vcc2 and supplies the Vcc2 to each function block, and each of the function blocks forms a capacity for stabilizing an output of the voltage drop circuit by means of its semiconductor structure by the Vcc1 and the Vcc2 applied thereto.

The invention provides a piezoelectric vibratory energy harvester, which comprises a central mounting structure, four side support beams, piezoelectric layers and a central mass block, wherein the central mounting structure comprises square supporting plates and four centrosymmetric mounting arms; the four side support beams are fabricated by four rectangular metal beams with the same shape; mounting holes for mounting are formed at the two ends; the piezoelectric layers are formed by four piezoelectric ceramic sheets and pasted on upper surfaces of the four support beams; and the central mass block is superimposed by a plurality of metal sheets and mounted in an area formed by the square supporting plates of the central mounting structure. According to the energy harvester, the mass of the central mass block is increased, the structure layout is arranged reasonably, the strain distribution of the piezoelectric layers is improved, and the adaptability of the designed energy harvester to a vibration source is improved, so that the energy harvester has a better practical value.

The invention discloses a PDMS-PTFE film for improving the performance of a nano friction power generator and a preparation method thereof, and belongs to the technical field of nano friction power generation. The preparation method includes the steps that polydimethylsiloxane (PDMS) prepolymer is weighed by weight and dissolved in normal hexane, the materials are mixed and stirred, and the materials are fully mixed to be uniform; PTFE emulsion is added into mixed liquid, the materials are heated and stirred, and a mixed solution is prepared; the mixed solution is cooled to room temperature, atetraethoxysilane cross-linking agent is added, a dibutyltin dilaurate catalyst is added, normal-temperature stirring is carried out, and an evenly-mixed PDMS to-be-cured solution is prepared; the PDMS to-be-cured solution is degassed; a substrate of the nano power generator is coated with the solution, curing is carried out, a film is peeled off the substrate, and the PDMS-PTFE film is prepared.The method which is simple in process and low in cost and can be used for large-scale production is provided for preparing the PDMS-PTFE transparent flexible film, and the novel method and thought are provided for production of high-performance TENG materials.

The invention discloses a level shift circuit suitable for a GaN high-speed gate drive circuit, and belongs to the technical field of power management. Gate drive control signal transmission is carried out by using a voltage-to-current-to-voltage structure, so that the rail-to-rail output capability is realized, and the situation of signal delay and even loss caused by the fact that the voltage ofa switch node of the GaN high-speed gate drive circuit is negative in dead time can be prevented; A dynamic current branch is adopted to carry out fast voltage transient protection, a common-mode transient noise interference resisting module is adopted to carry out anti-floating power supply rail dv/dt crosstalk protection, and the high CMTI capacity of an input end and an intermediate node of alevel shift circuit is achieved. A positive feedback latch module for limiting current is used for latching the current as an output maintaining structure. According to the level shift circuit, the transmission delay of the level shift circuit is reduced, high-speed signal transmission is realized, a low-resistance access and positive feedback are provided to prevent circuit output from being interfered by high dv/dt capability of the floating power supply rail, so that the high CMTI capability of the output end of the level shift circuit is realized, and the reliability of the circuit is improved.

The invention discloses a novel fuel cell manufacturing method based on a graphene thermoelectric management layer. The method comprises the following steps: forming a micron-grade concave-convex structure on a proton exchange membrane; preparing a catalytic layer on the surface of the proton exchange membrane with the concave-convex structure; preparing the thermoelectric management layer on the surface of the catalytic layer; preparing a diffusion layer on the surface of the thermoelectric management layer; and manufacturing a single cell in a flow field fixture. The thermoelectric management layer based on graphene has ultrahigh electronic conductivity and ultrahigh heat conductivity, so that electrons generated in an electrochemical reaction process of the fuel cell catalytic layer and required electrons can be exported and imported rapidly; electrochemical polarization and ohmic polarization are reduced; and the output performance is enhanced. Moreover, a large amount of waste heat generated by a catalyst can be discharged rapidly, and a stable electrochemical reaction is maintained. Meanwhile, the temperature and an electric field in the catalytic layer can be balanced, and the service life is prolonged. Moreover, a manufacturing process is simple and controllable, and suitable for industrial production.

The invention relates to an air intake apparatus for a vehicle motor which having a structure of loading an engine and a transmission in an engine chamber in the front of the vehicle along a horizontal direction thereof. A fan baffle has a cylinder portion surrounding the out circumference of a radiator fan. The axis centre of the cylinder portion relatively passes a horzontal line of the center of the radiator core, while side deflecting a core upwards and downwards along a vertical direction, simultaneously, a concave for housing the fan baffle is provided on the bottom of an air filter housing configured as an air filter, which overlaps with the upper of the cylinder portion along a vertical direction and provided inside corresponding to a side member on a horizontal direction of the vehicle. Thereby, air intake system members are provided efficiently, while degree of freedom of a headlamp modelling is increased and originality is improved.

The invention provides a linear compressor and a linear motor. The linear motor includes a first stator, a second stator spaced apart from the first stator; and a permanent magnet disposed to be movable in a first direction between the first and second stators. The first stator includes a bobbin with a coil wound thereon, and a stator core surrounding the bobbin. The stator core is located between the second stator and the coil and includes first and second magnetic poles spaced apart from each other. One portion or entire portions of each of the first and second magnetic poles have a constant magnetic path width within a range of a movement trajectory of the permanent magnet.

The invention discloses PVC gel driven flexible mechanical tongs and a preparing method thereof. A multi-layer PVC driver is arranged in a flexible outer frame. A flexible sensor is arranged on the top of the flexible outer frame. The multi-layer PVC driver is formed by stacking a plurality of single-layer PVC drivers, and object grabbing is achieved through the layer number of the single-layer PVC drivers and voltage applying. The PVC gel driven flexible mechanical tongs have the grabbing function and the sensing function at the same time, and on the basis of PVC gel driving, the drive form is simple.

The invention provides a control method and device for preventing liquid floodback of a compressor and an air conditioner. The control method for preventing liquid floodback of the compressor is basedon an air conditioning system, wherein the air conditioning system comprises the compressor and a gas-liquid separator; and the gas-liquid separator is equipped with a heating device. The control method comprises the steps of acquiring suction superheat, controlling the power of the heating device according to the suction superheat, and performing frequency reduction control on the compressor. The control method and device for preventing liquid floodback of the compressor judge the content of liquid refrigerants in suction gas according to the suction superheat, and control the compressor tooperate with frequency reduction; and at the same time, the heating device is controlled to heat the liquid refrigerants in the gas-liquid separator so as to evaporate the liquid refrigerants into gaseous refrigerants. The refrigerants absorbed by a gas return side of the compressor are ensured to be the gaseous refrigerants so as to avoid liquid floodback of the compressor. In addition, the suction superheat of the compressor after frequency reduction can be quickly increased, and the frequency of the compressor can be quickly adjusted back to a system set frequency so as to avoid the reduction in output capability of a unit caused by frequency reduction of the compressor.

The invention provides a motor output torque method and device. The motor output torque method comprises the steps of detecting a current slip rate of a vehicle and a current slope value at which the position the vehicle is located; according to the current slip rate of the vehicle and the current slope value at which the position the vehicle is located, obtaining current braking requirement torque of the vehicle; obtaining a maximum output torque value of a motor; judging whether a braking pedal signal is obtained or not; when the braking pedal signal is obtained, obtaining the current output torque of the motor according to the current braking requirement torque of the vehicle and the maximum output torque value of the motor, and sending a signal which controls the torque output of the motor to a motor controller according to the current output torque. According to the motor output torque method and device, the energy output of the motor during stepped brake in the downhill travelling process can be reduced, and the service life of a vehicle brake pad is prolonged.

The invention discloses a novel fuel cell based on graphene thermoelectric management layers. The novel fuel cell comprises a flow field plate, a diffusion layer, an anode catalytic layer, a proton exchange membrane, a cathode catalytic layer, a diffusion layer and a flow field plate, wherein the anode catalytic layer and the cathode catalytic layer both belong to catalytic layers, the novel fuel cell is characterized in that the graphene thermoelectric management layers are arranged between the anode catalytic layer and the diffusion layer and between the cathode catalytic layer and the diffusion layer and are prepared by mixing graphene, an alcohol solvent and a dispersing agent, and micro-sized concave-convex structures are arranged on the front surface and the back surface of the proton exchange membrane. The graphene-based thermoelectric management layers have ultrahigh electron conduction rate and ultrahigh thermal conduction rate, electrons generated during the electrochemical reaction process of the catalytic layers of the fuel cell and required electrons can be rapidly exported and imported, electrochemical polarization and ohmic polarization are reduced, and output performance is improved; moreover, a large amount of waste heat generated by a catalyst can be rapidly discharged, and stable electrochemical reaction is maintained; and meanwhile, temperature and electric field in the catalytic layers also can be balanced, and the service life of the fuel cell is prolonged.

The invention discloses a laser shock peening method for improving the intensity of a laser induced shock wave by adopting a time sequence double laser pulse, and belongs to the field of laser processing. The laser shock peening method aims at solving the problem that existing laser shock peening systems are generally insufficient in laser energy utilization so as to affect the intensity of shockwaves. The method comprises the step that a laser pulse A and a laser pulse B sequentially irradiate and shock the same position of a workpiece surface in a relative delay mode. The specific process comprises the following steps that firstly, the pulse A irradiates and shocks the surface of the workpiece to form an initial plasma, when the electron density of the initial plasma is reduced to be below the critical density of forming the plasma shielding effect, the pulse B which reaches in delay irradiates and shocks a target area, and a part of the laser energy of the pulse B reaches the surface of an absorption layer so as to continue to gasify and ionize the material of the workpiece; and the other part of the laser energy of the pulse B is subjected to inverse bremsstrahlung absorptionby the initial plasma formed through the pulse A. Under the conditions that the output capability of a laser device is not increased and the irradiation area of a light spot is not changed, the purpose of improving the intensity of the shock wave is achieved.

The invention discloses an air conditioner control method and an air conditioner. The air conditioner control method comprises the following steps that the first indoor temperature and the outdoor temperature during stable operating of the air conditioner are obtained; the first indoor temperature is compared with the outdoor temperature; and when the absolute value of the difference of the firstindoor temperature and the outdoor temperature is smaller than or equal to the first preset temperature difference, the operating frequency of a compressor of the air conditioner is reduced, so that the refrigerant volume flow rate of the air conditioner is decreased to a preset flow rate value. According to the technical schemes of the air conditioner control method and the air conditioner, the energy-saving effect of the air conditioner is improved.

The present invention relates to a valve group charging device and a valve group charging control method. The device comprises a printed circuit board, a controller, a valve group to be charged, a power switch and a charging power supply, the valve group to be charged, the power switch and the charging power supply are arranged on the printed circuit board, the printed circuit board is provided with an optical fiber interface, the valve group to be charged comprises at least two charging sub modules connected in parallel or in series, each charging sub module is provided with a charging circuit, the controller communicates with the charging sub modules through the optical fiber interface to send charging control signals to each charging sub module by turns, and the charging sub modules respond to the charging control signals to start corresponding charging circuits. The valve group charging device and the valve group charging control method can charge the sub modules alternately with no need for charging all the sub modules at one time so that a high charging voltage is not required, the output capacity of the charging power supply is reduced and the charging cost is reduced.

The invention discloses a stator and rotor structure of a high-power-density reluctance motor. The structure comprises a stator and a rotor, the number of stator slots and the number of rotor magneticbridges meet the formula (1): Nr = Ns-4k (1), Ns is the number of stator slots corresponding to each pair of poles, Nr is the number of rotor magnetic bridges corresponding to each pair of poles, K is a positive integer, and the number of rotor magnetic bridges corresponding to each layer of rotor magnetic barriers is 2; the number of layers of the rotor magnetic barriers is Nr/2, and then rounding is carried out; the opening angle alpha of the outermost layer magnetic bridge of the rotor meets the formula (2), wherein p is the number of pole pairs. According to the invention, the leakage flux of the motor can be reduced, the salient pole ratio of the motor is improved, the torque output capability of the motor is improved, and the torque ripple of the motor can be reduced.

The invention relates to a waste heat recovery based flexible peak regulation system and method for a thermal power generating unit. The system comprises a steam turbine, a generator, a compression type heat pump, a heat user, a heat storage tank, a cold storage tank and a heater for heating network, wherein the steam turbine is connected with the heater for heating network, and the heater for heating network is connected with the compression type heat pump to form a peak heating system; the heat user is connected with the heat storage tank and the cold storage tank to form a heat storage and cold release system; the compression type heat pump is connected with the generator to form a heat pump driving system; and the compression type heat pump is connected with the heat storage tank and the cold storage tank through a hot water pipeline to form a waste heat recovery and cold storage system. According to the waste heat recovery based flexible peak regulation system and method for the thermal power generating unit, heating network high-temperature return water is combined with the compression type heat pump system, the purpose of flexible peak regulation of the heat supply unit is achieved by consuming the on-grid electric quantity at an outlet of the generator of the unit, reducing the heating steam extraction flow of the unit and reducing the output capacity and the on-grid electric quantity of the unit, the overall peak regulation capacity and the waste heat utilization space of the unit are further improved, new energy consumption is promoted, and the use efficiency of primary energy is enhanced.

A fuel cell system includes a first fuel cell having first unit cells stacked together, a second fuel cell having second unit cells stacked together, a first voltage detector, a second voltage detector, and a controller. The first voltage detector detects voltage of the first unit cells for every “N” unit cells on average, and the second voltage detector detects voltage of the whole second fuel cell, or detects voltage of the second unit cells for every “M” unit cells on average. The controller determines whether any of the first unit cells is in a fuel deficiency state, by referring to a detection result of the first voltage detector, and performs a cancellation process to cancel the fuel deficiency state, on the first fuel cell that is in a power generating state, while stopping power generation of the second fuel cell, when an affirmative decision is obtained.