566 results about "Needle type" patented technology

The present invention relates to a three-needle type vascular closure system. The closure system utilizes three needles in the form of a guiding device, an expandable needle, and a hooking device. The guiding device is used to make the initial opening in the vessel, where the opening provides access for a sheath through which a medical procedure is to be performed. The expandable needle is inserted into the vessel in which it expands radially from the needle to form a target. The hooking device is also inserted into the vessel and is used to hook the expandable needle so as to form an internal union between the hooking device and the expandable needle. The needles can then be retracted thereby extending a suture from the hooking device and forming an internal suture pass that can be used to approximate the tissue surrounding the initial opening in the vessel. In one embodiment, the suture is passed across the vessel opening prior to dilation of the vessel opening.

The invention discloses a preparing method of an artificial graphite cathode material used in lithium ion battery; it aims at resolving problems that cathode material possesses higher discharging capacity, coulomb efficiency and long circle life. The preparing method includes following steps: coal or petroleum needle-type coke is comminuted, and hot processed for 1-48 hours at 800deg.C-3000deg.C, comparing with current technique, the cathode material adopts needle-type coke to be comminuted, and hot process, defect that high crystallinity graphite material can not be circled in electrolyte system of PC solvent stably, and it can discharge in big times, it can be used in lithium ion drive battery, and craft is easy, and it fits for industrialization production.

The invention discloses a method for preparing a bimetal composite plate by stirring friction braze welding. The method comprises that: a plate with small hardness is used as a covering layer metal plate; a plate with high hardness is used as a base layer metal plate; the covering layer metal plate and the base layer metal plate are horizontally fixed on a working platform surface in a lap joint mode; solders which can generate eutectic reaction with one of the upper / base layer metal plates are preset between the upper / base layer metal plates; a non-needle type cylinder friction device is arranged over the covering layer metal plate; the non-needle type cylindrical friction device is made to rotate and be pressed to be closely contacted with the surface layer of the covering layer metal plate, but not penetrate the covering layer metal plate, and the non-needle type cylindrical friction device rotates in the original position or moves forward along the surface of the covering layer metal plate while rotating; by utilizing frictional heat to melt the solders, the upper / base layer metal plates are both quickly melted in the solders, thereby achieving excellent interface combination; and the excessive solders are squeezed out, and a thin and dense soldering seam is formed, so that the bimetal composite plate is prepared. Compared with the braze welding in a furnace, the method has the advantages of high efficiency, energy conservation, pressure lead-in, unnecessary soldering flux and gas protection and short holding time at a high temperature.

A novel single needle hemodiafiltration apparatus and a novel single needle hemodiafiltration method for purifying blood with excellent removal performance via extracorporeal circulation with a single needle type are provided. The single needle hemodiafiltration apparatus includes a blood supply system for supplying blood, a dialysis fluid supply system for supplying a dialysis fluid and a system for controlling a movement of a fluid between the two supply systems, and a filtration / back-filtration liquid supply unit provided in the dialysis fluid supply system is controlled in conjunction with a blood pump provided in the blood supply system so that blood is removed from the body synchronously with the filtration and returned to the body synchronously with the back-filtration, thereby enabling extracorporeal circulation with the single needle. At a time of filtration, substances are removed by diffusion and ultrafiltration. At a time of recirculation in the blood circuit, substances are removed by diffusion. A high removal efficiency that cannot be achieved by the conventional single needle blood dialysis can be achieved by appropriately selecting the stroke volume per cycle, the number and order of the filtration / back-filtration / blank phases and the blood flow rate in each phase.

A high frequency alternating current medical device and method of using such is disclosed. High frequency alternating current medical device comprises a power source, an electric field generator, a self-limiting conductive material electrical component, at least one probe or needle-type projection, and at least two conductive segments located on probe or needle-type projection. At least two conductive segments are electrically connected to electric field generator so that an electric field is created between conductive segments, which induces an electrical current, which generates heat, and causes a certain desired precise cell injury. Self-limiting conductive material electrical component allows such precise cell injury because it limits electrical current through target tissue. Invention may be used in medical, dental, or veterinary applications. Exemplary embodiments include cosmetic applications, treatment of wrinkles, remodeling of subcutaneous tissue, treatment of muscle spasms, and others. Medical device can be small, hand-held, and easily manipulated to perform surgery.

The invention discloses a measuring device for gas permeability of a coal rock core. The measuring device mainly comprises a high-pressure gas source module, a core holder module, a circular pressure loading module, a data metering module and a vacuum treating module, which are connected through needle-type valves (3,5,7,9 and 13), wherein the high-pressure gas source module comprises a high-pressure gas bottle (1), a pressure relief valve (2) and a buffer container (4); the core holder module is a core holder (8); the circular pressure loading module is a hand-operated pump (12); the data metering module comprises precision pressure gauges (6 and 10) and a soap bubble flowmeter (11); and the vacuum treatment module is a vacuum pump (14). The measuring device is convenient to operate, has good repeatability of measured data, small experiment error and low cost, and is suitable for the testing field of gas permeability and equivalent liquid permeability of the coal rock core.

The invention relates to a needle-type electric heating cigarette system which comprises a power supply part, a heating part and a cigarette clamping part which are sequentially connected in a sealing manner. The needle-type electric heating cigarette system is characterized in that the power supply part mainly comprises a housing, a control circuit and a temperature display (11); the heating part mainly comprises a heating plate heat preservation and insulation layer (3), a heating plate (6) and a heating wire (5); the cigarette clamping part mainly comprises a barrel wall heat preservation and insulation layer (7) and a heating needle (4); the heating needle (4) is electrically connected with the heating wire (5), the control circuit and the temperature display (11); and the barrel wall heat preservation and insulation layer (7) is also provided with a gas inlet (8). According to the invention, applicability is greatly strengthened; a heater has a simple structure; cost of a heating element, a power supply, the control circuit, insulating materials and the like is low; the needle-type electric heating cigarette system is convenient to use; no or little sidestream smoke is generated, so that the emission amounts of harmful ingredients and environmental smoke of cigarettes are obviously reduced; and the needle-type electric heating cigarette system can become a tobacco technology widely applied in the future.

A needle-type heater (9) includes a needle-shaped heating body and a heating element (20), wherein: the needle-shaped heating body includes a tapered cap (18) and a heater substrate (19) connected with a bottom of the tapered cap (18); and the heating element (20) is attached to the heater substrate (19) in a way of coated printing. A production method of the needle-type heater (9) and an electrically heated cigarette with the needle-type heater (9) are also provided. The needle-type heater (9) can fully heat a tobacco product, and the tobacco product is easier to be inserted into a heating cavity (8), so that it is convenient to replace the tobacco product and use.

The invention provides a scanning recognition method and system for a matrix type two-dimensional code image of a special value-added tax invoice. The method comprises the following steps of: processing content information for printing the special value-added tax invoice to form a character string; representing a binary '1' module through four printing points to obtain a matrix type two-dimensional code of the character string; printing the content information and the matrix type two-dimensional code on the special value-added tax invoice; scanning to obtain a whole image of the special value-added tax invoice to be recognized; cutting out matrix type two-dimensional code images of the whole image and carrying out decoding treatment on the matrix type two-dimensional code images; and outputting decoding data information of the matrix type two-dimensional code images. According to the invention, a condition of punching the invoice is effectively avoided when a needle type printer is used for printing the two-dimensional code of the multi-copy special value-added tax invoice; meanwhile, the information capacity of a unit area is improved; the printing and scanning recognition method and system provided by invention also can be used for recognizing the condition that a file paper surface contains a plurality of the two-dimensional code images and the recognition efficiency is high.

The production process of lonicera flower tea includes the following steps: picking up fresh flowers, sorting, spreading out and drying in the air, steaming, drying and cooling, forming, firing tea with low flame, drying in the air, screening, firing with strong flame, vacuum packaging and storing so as to obtain the invented gold-flower silver-needle type flower tea with beautiful appearance and good health-care effect.

The invention relates to processes for the production and elements (components) with a nanostructure (2; 4, 4a) for improving the optical behavior of components and devices and / or for improving the behavior of sensors by enlarging the active surface area. The nanostructure (2) is produced in a self-masking fashion by means of RIE etching and its material composition can be modified and it can be provided with suitable cover layers.

The present invention relates to a three-needle type vascular closure system. The closure system utilizes three needles in the form of a guiding device, an expandable needle, and a hooking device. The guiding device is used to make the initial opening in the vessel, where the opening provides access for a sheath through which a medical procedure is to be performed. The expandable needle is inserted into the vessel in which it expands radially from the needle to form a target. The hooking device is also inserted into the vessel and is used to hook the expandable needle so as to form an internal union between the hooking device and the expandable needle. The needles can then be retracted thereby extending a suture from the hooking device and forming an internal suture pass that can be used to approximate the tissue surrounding the initial opening in the vessel. In one embodiment, the suture is passed across the vessel opening prior to dilation of the vessel opening.

A high frequency alternating current medical device and method of using such is disclosed. High frequency alternating current medical device comprises a power source, an electric field generator, a self-limiting conductive material electrical component, at least one probe or needle-type projection, and at least two conductive segments located on probe or needle-type projection. At least two conductive segments are electrically connected to electric field generator so that an electric field is created between conductive segments, which induces an electrical current, which generates heat, and causes a certain desired precise cell injury. Self-limiting conductive material electrical component allows such precise cell injury because it limits electrical current through target tissue. Invention may be used in medical, dental, or veterinary applications. Exemplary embodiments include cosmetic applications, treatment of wrinkles, remodeling of subcutaneous tissue, treatment of muscle spasms, and others. Medical device can be small, hand-held, and easily manipulated to perform surgery.

A heat regenerative engine uses water as both the working fluid and the lubricant. In operation, water is pumped from a collection pan and through a coil around a cylinder exhaust port, causing the water to be preheated by steam exhausted from the cylinder. The preheated water then enters a steam generator and is heated by a combustion chamber to produce high pressure super heated steam. Air is preheated in a heat exchanger and is then mixed with fuel from a fuel atomizer. An igniter burns the atomized fuel as the flames and heat are directed in a centrifuge within the combustion chamber. The speed and torque of the engine are controlled by a rocker and cam arrangement which opens a needle-type valve to inject high pressure super heated steam into a cylinder having a reciprocating piston therein. The injected steam expands in an explosive action on the top of the piston at high pressure forcing the piston down and drivingly rotating a linked crank cam and crankshaft. Exhaust steam is directed through a centrifugal condenser having an arrangement of flat plates. Cooling air from blowers circulates through the flat plates to condense the steam to a liquid state. The water condensation is returned to the collection pan for subsequent use in steam generation.

A heat regenerative engine uses water as both the working fluid and the lubricant. In operation, water is pumped from a collection pan and through a coil around a cylinder exhaust port, causing the water to be preheated by steam exhausted from the cylinder. The preheated water then enters a steam generator and is heated by a combustion chamber to produce high pressure super heated steam. Air is preheated in a heat exchanger and is then mixed with fuel from a fuel atomizer. An igniter burns the atomized fuel as the flames and heat are directed in a centrifuge within the combustion chamber. The speed and torque of the engine are controlled by a rocker and cam arrangement which opens a needle-type valve to inject high pressure super heated steam into a cylinder having a reciprocating piston therein. The injected steam expands in an explosive action on the top of the piston at high pressure forcing the piston down and drivingly rotating a linked crank cam and crankshaft. Exhaust steam is directed through a centrifugal condenser having an arrangement of flat plates. Cooling air from blowers circulates through the flat plates to condense the steam to a liquid state. The water condensation is returned to the collection pan for subsequent use in steam generation.

The invention discloses a mobile assembled multifunctional integrated test stand, which has a layered structure. In the structure, a first layer is a groove structure; a second layer is a test plate which can be embedded in the first layer movably, and a plurality of holes are distributed on the test plate; the third layer is a support layer which is supported by the groove by an insulated rod; the fourth layer is an insulating cloth test stand; the circuit of the test units of the test stand adopts multi-branch design; each branch comprises an electronic tripping device and a digital display meter arranged on a power supply side of the branch; and the electronic tripping devices and the digital display meters are arranged below the insulation test stand of the fourth layer. The test stand has the advantage of meeting arrangement requirements in power distribution conventional insulating test product tests such as insulating gloves, shoes, clothes, rods, pipes, plates, security helmets, pillar-type insulators, needle-type ceramic bottles, suspended insulators and lighting arrestors.

The invention relates to a suspension stability testing device and testing method used for testing suspension stability of high-density working solution solid phase granules under high temperature and high pressure. According to the invention, the suspension stability of a high-density working solution at a shaft bottom can be accurately evaluated, which provides scientific experiment references for well drilling operation. The device has the technical scheme that an O-shaped sealing ring of a container is arranged in a groove of an upper end surface of the high temperature and high pressure resistant container, the top end of an upper cover of the container is provided with an upper part needle type stop valve, and the stop valve is connected with a constant-pressure constant-speed pump; the container is wrapped with a heating sleeve outside, a side wall of the container is provided with a temperature sensor and 11 pressure transmitters distributed equidistantly and is connected with a computer; the lower part of the container is sealed with a lower cover of the container and the O-shaped sealing ring, and the lower cover of the container is provided with a lower part needle type stop valve;the container is divided into two sealed cabins by the O-shaped sealing ring; and a U-shaped base is connected with the container through a rotary shaft, and the front end of the rotary shaft is provided with a brake switch. The device can be used for accurately testing the suspension stability of the high-density working solution under a high-temperature and high-pressure environment.

A 10kV power distribution circuit insulation tower head is disclosed, which is characterized in that: adopting hydrophobic high-strength insulation bar to be assembled with needle-typed insulator by gold tool and form an insulation tower head entity, or adopting hydrophobic high-strength insulation bar to be assembled with gold tool directly and form an insulation tower head. By using the invention, the insulation level of the power distribution circuit can be greatly improved, the thunder discharge air gap can be obviously enlarged, the lightning stroke and line break accidents can be effectively prevented and the climbing distance can be expanded, further, the structure type is easy to improve self-cleaning ability and the occurrence of pollution flashover can be basically and completely precluded, which is beneficial in charged operation, simple in operation process and improves the operation security.

A stress wave nondestructive detection device for ancient tree / ancient building timber structure inner decay comprises a plurality of sensors, a sensor fixing device, a force hammer, a microdestructive needle-type connector, a data process system, and a timber inner decay tomographic software; the sensors and the data process system are connected with a computer installed with the tomographic software through a plurality of wires. The device has strong adaptability, and can perform 'completely nondestructive' detection of inner decay for ancient building timber structures which are not suitable for nailing at external surfaces through the special sensors and sensor fixing device; as for test objects such as ancient trees with bark, the device can penetrate the bark by using the microdestructive needle-type connector so as to assist detection. Based on stress wave signals collected during detection, an inner decay tomographic image of the detected object can be constructed, and thus quantitative determination of the inner decay shape and position of the detected object is realized.

The invention relates to a smoke sucking device which can realize continuous single port sampling of gas-phase substances in mainstream smoke, and is characterized in that the smoking device comprises a cigarette-piece clamper, a smoke accumulation drum chamber provided with an exhaust piston, and a suction pump which are connected in sequence through a pipeline, wherein the smoke accumulation drum chamber communicates with the cigarette-piece clamper and a suction pipeline of the suction pump through an inlet valve and a suction valve respectively; a smoke outlet pipe controlled by an outlet pipe is arranged at the top end of the smoke accumulation drum chamber. The smoke outlet pipe can be divided into two following categories of structures: (1) a U-shaped pipe structure which can be directly inserted in a collecting bottle; (2) a needle-type sampling pipe structure for direct sample introduction. The device has the advantages that the structure is simple, and the operation is simplified; the process for preparing samples during the analysis of the gas-phase part of the mainstream smoke can be greatly simplified; not only the collection to the gas-phase part of the mainstream smoke can be realized, but also the continuous collection to the gas-phase part of the mainstream smoke can be realized; the device can also be used as a sampler; furthermore, the mainstream smoke is directly injected in an analysis instrument for analysis.

The invention discloses an annular arrangement type multi-needle biological tissue dielectric spectrum characteristic measuring probe, which comprises a base, wherein a plurality of needle type electrodes, a change-over switch and an excitation end and measuring end interface are arranged on the base; the plurality of needle type electrodes are arranged on two concentric circles of an inner ring and an outer ring formed on the base at equal interval and is perpendicular to the base to serve as excitation electrodes and measuring electrodes; and the electrodes of the same function are internally connected through copper wires on the base and are connected with the excitation end and measuring end interface through the change-over switch. The probe also comprises a calibration box which is matched with the probe for use. The invention also discloses an implementation method for biological tissue dielectric characteristic measurement by using the probe. The problem of strict requirement on shapes of tissues to be measured by the conventional measuring device is effectively solved, so that the electrical impedance measurement on the tissues of irregular shapes or the tissues difficultto cut is made possible.

The invention relates to a needle type roughmeter, which comprises a support frame, a motion part, a plurality of faceplates and steel needles, wherein the support frame is provided with parallel slide rails; the motion part is positioned in the support frame and slides along the parallel slide rails, and the relative inner side wall of the motion part is provided with a plurality of faceplate inserting grooves; the faceplates are inserted into the faceplates inserting grooves and are provided with a plurality of vertical steel needles inserting grooves along the length direction; and the steel needles are inserted into the steel needles inserting grooves and can vertically fall onto the ground along the steel needles inserting grooves. The needle type roughmeter measures the roughness of the fixed surface, can measure area arrays for once and measure surfaces with a certain gradient, is convenient in operation, and has high precision.

The invention relates to a needle type extraction device suitable for gas chromatography and a using method. The extraction device consists of a heat resistant stainless steel needle head and a section of adsorbents filled inside a needle cylinder, wherein the adsorbents serving as extraction media are used for absorbing a trace amount of volatile or semi-volatile organic compounds; and adsorbent microspheres are fixed inside the needle cylinder by using heat resistant glass cotton. A needle bed of the device can be connected with a simple gas pump or an exchangeable needle head type hermetically sealed injector to extract and concentrate a target material; after the extraction, the device is combined with the gas chromatography to realize thermal desorption under the condition of inert gas serving as a carrier gas and a high temperature of a vaporizing chamber so as to perform the separation and detection in the gas chromatography. The device can also store a sample by sealing the two ends of the device with a Teflon seal head for subsequent analysis when a field test is unavailable. The extraction device can be applied to the analysis of the fast extraction of a trace amount of gas samples in the chemical field.

The invention discloses a swelling-type hollow silk fibroin micro-needle drug delivery system and a preparation method thereof. According to the technical scheme of the preparation method, a swelling modified silk fibroin solution is casted in a PDMS mold to be vacuumized, dried and molded as a hollow needle-type housing. After that, a silk fibroin micro-needle array provided with cavities in the hollow needle-type housing is filled with powder-like or solution-like drugs, vacuumizing and drying are carried out to form a drug part. Finally, a layer of modified silk fibroin solution is cast, dried and molded as a cladded coating. The cladded coating is removed to obtain the swelling-type hollow silk fibroin micro-needle drug delivery system. The drugs are wrapped inside the cavities of the silk fibroin micro-needle arrays, so that the system is high in drug loading ratio and low in skin allergenicity and stimulation. The system facilitates the sustained release and the controlled release of micro-needle drugs. Meanwhile, according to the preparation method, since the swelling modified silk fibroin solution is cast, dried and molded in a mild processing condition, the system is low in processing cost and suitable for large-scale production. Drugs are directly wrapped in the cavities of the swelling hollow micro-needles, so that controlled-release drugs are swelled in the micro-needle base material. In this way, the biological activities of the controlled-release drugs are maintained, while the structure of the hollow silk fibroin micro-needle drug delivery system is greatly simplified. The system is better in practicality.

The invention discloses a slurry state bubble tower reactor with a needle type fin tube bundle. A plurality of vertical heat exchange tubes are arranged in the cylindrical reactor; the upper ends of the vertical heat exchange tubes are connected with a liquid distributor fixed below a container, while the upper ends are connected with a liquid collector fixed above the container; the outer walls of the heat exchange tubes are provided with horizontal needle type fins; the number of the needle fins arranged on the heat exchange tubes is 80-800 every meter, the diameter of the needle type fins is -10 mm, and the length of the needle type fins is 10 125 mm. The heat exchange tubes with the needle type fins are adopted to increase the heat exchange area and strength the heat exchange capability of the reactor on one hand, and on the other hand, the needle type fins distributed on the outer walls of the heat exchange tubes can obstruct the flowing of sizing agents and bubbles in the tower, can suppress the flow steeping effect caused by the vertical heat exchange tubes, improve the flow rate distribution of a slurry bed and achieve double functions of reinforcing heat transfer and improving the flow.

Needles are widely used in interventional radiology. Each medical application requires a specific needle type. The same holds for the photonic needles which analysis depends on the type of application the clinician aims for. Therefore, it is relevant to have the X-ray machine recognize the type of needle that is being used and to load the required software for the tissue analysis. It is therefore proposed to have a data link established between the imaging modality used for the acquisition of the patient anatomy (X-ray, CT, MR or US) and the system that processes optical data from the needle, so that the information from this imaging modality can be used to guide the processing. In a preferred embodiment the selection is made by reading out the code present in the disposable needle when it is connected to the console.

The invention discloses an overhead power cable and an arrangement method thereof. The overhead power cable comprises a cable wire which is sheathed by heat-shrinkable insulating tubes with a quantity equal to the quantity of required needle-type ceramic bottles. The length of each heat-shrinkable insulating tube is greater than the diameter of each ceramic bottle. The arrangement method of the overhead power cable is as below: when cable layout is carried out, sheathing the heat-shrinkable insulating tubes with the equal quantity on the cable wire; and when the overhead cable arrangement is carried out, heating the insulating tubes on the cable in a manner of corresponding to the positions of the ceramic bottles, fixing the insulating tubes at ceramic bottle contacting positions and then mounting the insulating tubes in grooves of the ceramic bottles. The cable has the advantages of simple structure, convenient arrangement, good short-circuit prevention effect and power supply safety guaranty.

The invention relates to a system and a method for automatically measuring the property of a vapor stream vacuum pump, which belong to the technical field of vacuum test. The invention can be in strict accordance with the test principle and the method specified in national and international standards to automatically complete the test of parameters of the vapor stream vacuum pump. The system comprises a test cover, a gas flow testing unit, a fore pipe gas flow adjusting unit, and the like, wherein the gas flow testing unit comprises a dropper, a dropper magnetic valve is arranged at a gas inlet of the upper part of the dropper, and the outer side of the dropper is provided with an upper liquid level switch and a lower liquid level switch; a test cover gas flow adjusting unit and the fore pipe gas flow adjusting unit both comprise stepping motors, needle type micrometering valves and high-vacuum magnetic valves, drive buttons of the needle type micrometering valves are connected with the stepping motors, and gas outlets of the needle type micrometering valves are connected with the high-vacuum magnetic valves; and the liquid level switches, the dropper magnetic valve, and the like are connected with a computer control unit. The measuring method comprises the following steps of measurement of limit pressure of the vapor stream vacuum pump, measurement of volume flow rate, and measurement of critical fore pressure.

The invention relates to a needle type syringe with a function of accurately filtering dissolved drug. The needle type syringe with the function of accurately filtering the dissolved drug comprises a push rod, a first dissolved drug tube, a dissolved drug cavity, a second dissolved drug tube and an injection needle, wherein the push rod is movably installed in the first dissolved drug tube, and the first dissolved drug tube is communicated with the dissolved drug cavity; a main channel and an auxiliary channel are arranged inside the second dissolved drug tube; the first end of the main channel is communicated with the dissolved drug cavity, the second end of the main channel is communicated with the injection needle, the first end of the auxiliary channel is communicated with the dissolved drug cavity, and the second end of the auxiliary channel intersects with the main channel. The needle type syringe with the function of accurately filtering the dissolved drug further comprises a main one-way valve plate and an auxiliary one-way valve plate, wherein the main one-way valve plate is installed at the first end of the main channel, the auxiliary one-way valve plate is installed at the second end of the auxiliary channel, and the main one-way valve plate and the auxiliary one-way valve plate are opposite to each other relative to the opening direction of the main channel; an accurate filter film is arranged in the dissolved drug cavity, and the space, located between the first end of the main channel and the first end of the auxiliary channel, of the interior of the dissolved drug cavity is divided by the accurate filter film. The needle type syringe with the function of accurately filtering the dissolved drug can filter drug liquid, and the phenomenon that particles cause damage to the body of a patient is avoided.

The invention discloses a needle type porous material emitter array type mini-type field emission electric thruster. The electric thruster comprises a neutralizer and a thruster main body which are connected with each other, wherein the thruster main body comprises a grid electrode, an insulating bracket and a propellant storage chamber which are sequentially matched and connected with one another from top to bottom; the insulating bracket is of a frame-type structure; an emitter array matched with the grid electrode is arranged inside the insulating bracket; a heater and the propellant which are matched with each other are arranged below the emitter array; the propellant and the heater are both positioned in the propellant storage chamber. The needle type porous material emitter array type mini-type field emission electric thruster disclosed by the invention is small in size, compact in structure, simple in structure, capable of being made into a chip-shaped mini-type thruster, applicable to mini-type satellites and especially applicable to mini-type satellites of which the weight is smaller than 10kg.