168results about How to "Stable working temperature" patented technology

Novel reactor, systems and methods of preparing nanocrystals in a continuous flow-through process are provided. The novel reactor is highly configurable and can be modified to achieve desired reaction times of a flow through mixture. The reactor is designed to provide uniform, efficient heating of the reaction mixture.

The invention provides a tobacco stalk pre-processing method and tobacco stalk pre-processing equipment which can shorten the water permeability time of the tobacco stalk, ensure consistent moisture of the soaked tobacco stalk, save the storage process of the moistening of the tobacco stalk and simplify the process flow. The method comprises the following steps of: feeding a tobacco stalk material into a screw conveyer which is filled with steam and keeps proper pressure and proper temperature; continuously feeding the tobacco stalk material into the screw conveyer through a feeding vapor lock; continuously discharging the tobacco stalk material through a discharging vapor lock; and increasing the moisture and the temperature of the tobacco stalk to meet the requirements of the stalk pressing and cutting process on the discharging temperature and the moisture. The equipment comprises a bearing screw conveyer with a steam inlet and a water drainage port; a feed port and a discharge port of the screw conveyer are provided with the feeding vapor lock and the discharging vapor lock respectively; and the feeding vapor lock is provided with a water replenishing port. The water permeability of the tobacco stalk is improved by increasing the pressure and the temperature of the moistening environment of the tobacco stalk, so that the method and the equipment shorten the water permeability time of the tobacco stalks, quickly realize the pre-processing effect of the moistening of the tobacco stalk, save the storage process of the moistening of the tobacco stalk and greatly simplify the process flow of the stalk processing.

An application device for driving aromatherapeutic particles, in that the application device provides safe and constant temperatures for activating aromatherapeutic particles through a medium material having a high evaporation temperature, such that aromatherapeutic particle elements having intact and complete structures are evenly liberated and released. The application device comprises a heating device having an operating temperature which disengages aromatherapeutic particles and is lower than an evaporation temperature of a fragrance discharging body. The heating device indirectly heats the aromatherapeutic particles of the herbal material contained in the medium, and achieves a constant temperature through self-heat-exchange of the medium while also liberates the aromatherapeutic elements. Thereby, the aromatherapeutic particles maintained with intact and complete structures are discharged outwards using heat circulation, and are released With stable amounts.

A driving circuit for a light source is provided. The circuit is suitable for a light source with a plurality of light emitting diodes (LED). The circuit includes a first pulse width modulation (PWM) unit and a power conversion unit. The first PWM unit generates a first PWM signal. The power conversion unit generates a driving voltage signal for controlling the light source to perform forward bias operation or reversed bias operation according to the duty cycle of the first PWM signal.

The invention provides a fuel cell micro high-efficiency thermo-operated self-circulating cooling system, comprising: bipolar plate whose inner cavity is provided with microchannel evaporator, and condenser tube, where the condenser tube is connected with the microchannel via inlet and outlet micro check valves having one-way turn-on function, and there is circulating cooling medium inside the condenser tube and the microchannel, and according to the requirement for cooling and heat discharge, the condenser tube is also provided with heat radiation fins, and connected with cooling working medium storage cylinder. And it has good heat radiation effect, simpler structure and higher total utilization ratio of cell stack, and applies to low temperature fuel cell stacks such as PEMFC, and DMFC.

The invention provides a system for recycling vaporized cold quantities. The system can recycle the vaporized cold quantities of a cryogenic liquid with a higher energy utilization rate, and comprises an air-bath carburetor (3) connected with a cryogenic liquid tank (1), and a vaporized gas outlet of the cryogenic liquid (7). The system is characterized in that a water-bath carburetor (2) is connected in parallel at both ends of the air-bath carburetor (3), and a sink (4) of the water-bath carburetor (2) is connected with technological equipment (5) through a circulating water pump (6), a valve, a water supply pipeline (8) and a backwater pipeline (9) to form a cooling water circulating system.

The invention relates to the technical field of distribution box, in particular discloses a combined indoor heat dissipation type distribution box. The combined indoor heat dissipation type distribution box comprises a distribution box body and a door, a plurality of cabinets are arranged in the distribution box body, both sides of the distribution box body are provided with fixing plates, guide rails are arranged on the fixing plates, the lower two sides of every cabinet are provided with rolling wheels, a limitation block is arranged at the rear bottom surface of every cabinet, a connection piece is arranged at the front bottom surface of every cabinet, stoppers are arranged at the inner ends of the guide rails on the fixing plates and provided with limitation hooks, distribution components are arranged in every cabinet, conductive bus bars are respectively arranged outside every cabinet, an air inlet is arranged at the bottom of the distribution box body, an air outlet is arranged in the top of the distribution box body, a top hood is arranged at the upper end of the distribution box body, an exhaust hole is arranged on the side of the top hood, and an eddy fan is arranged corresponding to the air outlet in the center of the top hood. The combined indoor heat dissipation type distribution box can be used by being mounted in an E-HOUSE (electrical housing). The combined indoor heat dissipation type distribution box has the advantages of mounting, demounting and maintenance convenience and good heat dissipation effects.

An apparatus to promote gas-liquid contact and facilitate enhanced mass transfer. The dispersed bubble reactor (DBR) operates in the dispersed bubble flow regime to selectively absorb gas phase constituents into the liquid phase. The dispersion is achieved by shearing the large inlet gas bubbles into fine bubbles with circulating liquid and additional pumped liquid solvent when necessary. The DBR is capable of handling precipitates that may form during absorption or fine catalysts that may be necessary to promote liquid phase reactions. The DBR can be configured with multistage counter current flow sections by inserting concentric cylindrical sections into the riser to facilitate annular flow. While the DBR can absorb CO₂ in liquid solvents that may lead to precipitates at high loadings, it is equally capable of handling many different types of chemical processes involving solids (precipitates/catalysts) along with gas and liquid phases.

The invention belongs to the technical field of optical measuring, and more specifically relates to a passive remote sensing technique-based monitoring system and a method of tail gas of ships at a plurality of berths in a harbor. The passive remote sensing technique-based monitoring system comprises a rotary platform, a telescope, a camera, a middle shaft, a spectrometer, and a computer; the telescope and the camera are provided with a same angle of visual field; measuring of spectrum signals at horizontal and vertical angles of a monitored range can be realized under controlling using the computer, an area without ship tail gas pollution is taken as a background value, and spectral analysis is adopted to obtain differential optical thickness and obtain the distribution situations of gasto be detected in the plane; spectrum signals received by the telescope are combined with smoke plume and sky cloud layer situations recorded by the camera, data with relatively large difference caused by cloud layers are selected via screening, and the accuracy of measured results is verified based on smoke plume distribution situations in images. The passive remote sensing technique-based monitoring system and the method can be used for reflecting the ship tail gas plane concentration distribution images of a whole harbor through contrast analysis on spectral analysis result and image contrast analysis at different view fields, and realizing rapid determination of ships with relatively high tail gas concentration in the harbor.

The invention discloses heat management system for an electric locomotive traction converter. The heat management system comprises a cooling tower, an evaporator and an internal circulation draught fan. The cooling tower and a converter cabinet of the electric locomotive traction converter are connected into a whole. The evaporator and the internal circulation draught fan are installed in the converter cabinet. The cooling tower is provided with a compressor and a condenser. The compressor is connected with the condenser through a pipeline, refrigerant in the pipeline is compressed into high-temperature and high-voltage steam, and the heat is dissipated to the environment through the condenser. The refrigerant becomes high-temperature and high-voltage liquid and then is divided into two paths. One path of liquid enters a heat dissipation device of a power device in the converter cabinet and becomes a low-temperature and low-voltage gas-liquid mixing state to absorb heat. The other path of liquid enters the evaporator, and the internal circulation draught fan faces the evaporator so as to blow cold air into the converter cabinet. The heat management system has the advantages that the integral heat exchanging efficiency of the converter is improved, and the working temperature is reduced and is stable and is not affected easily by the outside environment.

The invention relates to a temperature-compensating oscillator device which can keep the temperature constant. The oscillator device comprises a shell, a circuit board arranged inside the shell, a suspended temperature-compensating oscillator arranged on the circuit board and a heating control circuit arranged on the circuit board. The shell is vacuumed and is provided with a plurality of conductive platforms at intervals for jointly supporting the circuit board and a plurality of exposed conductive connection points which are electrically connected with one end of the conductive platforms so as to electrically connect each conductive connection point with the circuit board by each conductive platform. By virtue of the high erection of the circuit board and the small contact area between the circuit board and conductive platform, the thermal conduction of the heat generated by the heating control circuit to the shell is reduced; in addition, the vacuumed shell can effectively eliminate thermal convection and function as a thermal radiation blocking layer by being matched with a gold-plated layer on the surface of the shell, thus guaranteeing that the interior of the shell stays at the constant temperature status. The temperature-compensating oscillator device can effectively reduce thermal conduction and block the thermal convection, thus keeping the temperature-compensating oscillator at stable working temperature, and being rather practical.

The invention adopts comparison circuit to build temperature control circuit. It consists of four parts that are temperature sampling, temperature setting, temperature comparison and control, and temperature adjustment. It is different from the temperature control devices adopting pulse width modulator, D/A conversion and feedback analogue circuit. The invention can adjust working temperature of laser within 20-30deg.C, temperature error is less than or equal to minus or plus 1deg.C.

The invention provides a combustible harmful gas detector capable of eliminating a temperature drift. The detector comprises a housing, a temperature feedback control circuit, a gas sensitive sensor and a sampling resistor, wherein the temperature feedback control circuit is connected with the heating wire RH of the sensitive sensor; and the sampling resistor is connected in series with a sensitive resistor RS of the gas sensitive sensor. The combustible harmful gas detector has the beneficial effects that by the temperature feedback control circuit, sensor heating voltage can be automatically adjusted along with the change of environmental temperature, so as to guarantee a stable working temperature of a sensitive material of the sensor and eliminate influence on the precision of the sensor due to the temperature drift. In different external environments, the temperature drift characteristic of a conventional metal oxide semiconductor gas sensitive sensor can reduce the detection precision. The combustible harmful gas detector integrated with the temperature feedback control circuit can well solve the problem; the reliability of a detection result of the detector is much higher than that of a detection device without temperature compensation, and the detection error is reduced from original -40 percent to +70 percent to +/- 10.

A semiconductor laser temperature controller comprises a precision reference source, a temperature sampling unit, a temperature setting unit, a temperature error amplifying unit, a sawtooth wave generator, a PWM (pulse width modulation) signal generator and a power conversion stage, the precision reference source supplies precision reference voltage to the temperature sampling unit and the temperature setting unit, the temperature sampling unit and the temperature setting unit output signals and input the error signal between the actual temperature generated by the temperature error amplifying unit and set temperature, the error signal and the sawtooth wave generated by the sawtooth wave generator are simultaneously inputted into the PWM signal generator, so that a pulse width modulation signal is generated, and therefore the voltage output of the power conversion stage is controlled to drive a semiconductor chilling plate TEC to control temperature. The semiconductor laser temperature controller has the advantages of simple structure, high efficiency and low cost, realizes a temperature control function, and can regulate the stable operating temperature of a semiconductor laser according to needs, and the temperature error is less than or equal to positive or negative 0.5 DEG C.

The invention discloses a piston engine valve timing and variable lift driving system. On the basis of the shear thickening fluid critical speed phase change characteristic and the cam speed change curve driving rule, the effective length of a shear thickening tappet changing in the same direction as change of rotation speed of a cam is adaptively obtained according to the change of the rotation speed of the cam (or the rotation speed of an engine), the opening advance angle, the lift and the closing delay angle of a valve are automatically adjusted, and thus the dynamic property, the strengthening degree, the low temperature startability, the low speed stability, the economical efficiency and the exhaust cleanliness of the engine are improved. According to the technical scheme, the system is free of electronic control, simple in mechanical structure, reliable in work, convenient to arrange, low in cost, easy to maintain, smooth in engine power output and capable of being widely applied to driving valves of various piston engines.

The invention provides a butterfly type packaging semiconductor laser heat sink apparatus. The apparatus comprises a heat sink base plate and a heat dissipation platform, wherein installation holes are arranged at four corners of the heat sink base plate, the installation holes are used for fixing a PCB and a support part, the position, which is used for welding a butterfly type packaging semiconductor laser, of the PCB is hollow, the heat dissipation platform is disposed between the heat sink base plate and the abdomen of the butterfly type packaging semiconductor laser, the heat dissipation platform is in a hollow form, and the heat dissipation platform is provided with four installation holes. Through combination of the heat sink base plate and the heat dissipation platform, the heat dissipation efficiency is improved, the thermal conductivity is high, the work temperature of the butterfly type packaging semiconductor laser is stable, the heat sink material is light aluminum, the volume is small, the weight is small, the structure is simple, the installation is convenient, the weight of overall heat sink is quite small, and the requirement of such special occasions as aerospace and the like for light weight is satisfied.

The present invention provides a system and method for purifying vanadium pentoxide. Industrial grade vanadium pentoxide is converted to vanadium oxytrichloride by low temperature fluidizing chlorination, wherein chlorinating gas is preheated via heat exchange between fluidizing gas and chlorination flue gas, and an appropriate amount of air is added to enable a part of carbon powder to combust so as to achieve a balanced heat supply during the chlorination, thereby increasing the efficiency of chlorination and ensuring good selectivity in low temperature chlorination. The vanadium oxytrichloride is purified by rectification, and then subjected to plasma oxidation, thereby obtaining a high-purity vanadium pentoxide product and chlorine gas. The chlorine gas is returned for low temperature chlorination. The system and method have advantages of favorable adaptability to raw material, no discharge of contaminated wastewater, low energy consumption and chlorine consumption in production, stable product quality, etc.

The invention discloses a method for achieving a semiconductor cooler control loop based on software. A control circuit part in a semiconductor refrigeration control loop is digitalized through the software, and debugging, testing and problem positioning on a light receiving and transmitting module are facilitated. An analog control circuit in the technical scheme in the prior art is omitted, the layout area of the circuit board is reduced, the packaging of the light receiving and transmitting module becomes smaller and smaller, the material cost of the light receiving and transmitting module is reduced, a circuit structure and a software scheme through which the circuit board space can be saved and the cost can be reduced can be provided for the light receiving and transmitting module, and the method is worthy of being greatly popularized.

The invention relates to encapsulation of a microelectronic biosensor chip, in particular to an encapsulation structure of a compact multi-channel temperature-controllable silicon-based biosensor chip. The structure includes a first board, a second board and a third board, wherein the first board, the second board and the third board are sequentially overlapped in seamless joint mode; the second board is provided with a straight slot penetrating through the surface of the second board, the silicon-based biosensor chip is placed in the straight slot, a gap is formed between the bottom surface of the silicon-based biosensor chip and the surface of the third board, and the gap is filled with heat-conduction glue; the portion, directly facing the silicon-based biosensor chip, of the surface ofone side, attached to the second board, of the first board is provided with a micro flow groove, and the micro flow groove and the top surface of the silicon-based biosensor chip form a chamber usedfor containing to-be-detected liquid. According to the encapsulation structure of the silicon-based biosensor chip, the whole structure is compact, the size is small and the integration degree is high. The design of a laterally introduced PDMS micro flow channel makes the to-be-detected liquid fully contact with a microring resonator structure on the surface of a silicon wafer, and the testing sensitivity is greatly improved.