1888results about How to "Small footprint" patented technology

A wet ammonium flue gas cleaning process for desulfurizing and denitrifying and a system thereof are disclosed. The process oxidates NO in the flue gas to be NO2, makes SO2 and NO2 in the flue gas react with ammonium to product ammonium sulfite, ammonium nitrate and ammonium nitrite, then oxidates ammonium sulfite and ammonium nitrite therein to product the byproduct that is ammiaonia sulfate and ammonium nitrate, and lastly gets the clear flue gas after demisting to the desulfurizing and denitrifying flue gas. The system comprises a dust pre-collector, a hydrogen peroxide or ozone sprayer, and a desulfurizing and denitrifying tower, which are connected in turns, wherein ammonia replenishment system and an air feeding device are mounted at the bottom of the desulfurizing and denitrifying tower, sprinkling layer which can cycle sprinkle is mounted at the middle, and a demister is mounted at the upper. The invention has a simple process, a simplified system, a low investment and operation cost. The invention not only has a high efficiency in desulfurizing and denitrifying, but also a high utilance of desulfurizing and denitrifying absorbent, and byproduct of desulfurization and denitration can be utilized as chemical fertilizer of ammiaonia sulfate and ammonium nitrate.

The invention discloses a nozzle transmission mechanism for a 3D printer. The nozzle transmission mechanism comprises a platform used for holding a workpiece, a mounting seat which is positioned above the platform and is used for fixing a nozzle, more than three transmission components distributed at the periphery of the platform, and a controller used for controlling each driving motor, wherein each transmission component comprises a guide rod which extends along the height direction, a sliding seat arranged on the guide rod in a sliding mode, a driving motor used for driving the sliding seat to move up and down along the guide rod, and a connecting rod; and two ends of the connecting rod are respectively connected with the mounting seat and the sliding seat in a universal hinge mode. Three or more than three guide rods in the vertical direction are arranged only, the sliding seat on the guide rods is driven by the motor, the nozzle is driven to move in the height direction and the horizontal direction through differential motion among the sliding seat, and compared with the conventional three-axis association transmission mechanism, the nozzle transmission mechanism has the advantages of simple structure, small occupied space, high operating precision and the like, the 3D printing efficiency can be improved, and the defective percentage of the workpiece is reduced.

The invention discloses a motor rotor automatic assembling machine including an iron core feeding device, a main shaft feeding device, a press-fit device, an insulating sheet feeding device, a turning device, a dispensing device, a commutator feeding device, a rotary disc conveyer, and a discharging device. The rotary disc conveyer includes a first rotating disc and a second rotating disc, the iron core feeding device, the main shaft feeding device, the press-fit device, and the insulating sheet feeding device are cooperated on the first rotating disc to assemble an iron core, a main shaft, and an insulation sheet into a half-finished rotor, the turning device conveys the half-finished rotor to the second rotating disc, the insulating sheet feeding device, the dispensing device, the commutator feeding device, and the press-fit device are cooperated on the second rotating disc to assemble the half-finished rotor, a lower insulation sheet, and a commutator into a finished rotor, and the discharging device takes the finished rotor off the second rotating disc and rotates for discharging. The whole machine is compact and reasonable in structure, high in efficiency, low in cost, and high in automation degree.

A document imaging apparatus (10) for recording document data has an imager body (12) that has an image data transformation apparatus (34) and a paper feed apparatus (36) for urging a document sheet along a paper path from a paper feed input source (14), past the image data transformation apparatus (34), to an output slot (16). The imager body (12) is pivotably coupled to a support pedestal (20) for adjusting the tilt angle of the imager body (12) to one of a plurality of tilt angle positions.

The invention discloses a multi-functional elevator, comprising a chassis component and a lifting table component, wherein, a scissors mechanism is hinged between the chassis component and the lifting-table component to support or drive the lifting table component; a driving device is arranged on the chassis component to drive the extension and retraction of the scissors mechanism; the driving device is controlled by a controller arranged on the chassis component. The driving device adopts a worm-wheel and worm type speed reducer, and is internally provided with a self-locking mechanism; the chassis component is provided with a roller component with an induction device, and the usage safety of the chassis component is greatly improved. The multi-functional elevator of the invention has small and exquisite appearance structure in design with the thickness being less than one foot under complete compression state, can be completely stored at the bottom of chambers and under beds and other places, occupies less space, and is convenient to be stored. The invention also has multiple functions of being used as an experiment workbench in a laboratory, being used as a table after being lifted to a proper height and being used as a lifting device for placing heavy objects and the like, realizing multiple use of one machine.

The invention provides hot-forming, punching and edge-cutting integral technology and a hot-forming, punching and edge-cutting integral die for high strength steel parts. The integral technology comprises the following steps: arranging an edge-cutting and punching tool on a hot-forming die of the high strength steel parts; placing high strength steel plate materials which is heated to be completely austenized into the hot-forming die for punching before hot stamping forming of the high strength steel plate materials; utilizing the edge-cutting and punching tool on the hot-forming die to perform edge-cutting and punching operations on workpieces subjected to stamping after the hot-forming die is closed; cooling the hot-forming die after the operations are over; and utilizing die components which contact formed parts to quench the formed parts. The integral die comprises a forming convex die, a forming concave die, an upper punching tool, a lower punching tool, an upper edge-cutting tool and a lower edge-cutting tool. The integral technology and the integral die reduce the production cost of the hot-formed parts, and shorten the production period of the hot-formed parts; and the hot-formed parts have high edge-cutting and punching quality and high dimension precision and shape precision.

A high density integrated optical chip. The optical chip features an optical function connected to a low minimum bending radius dielectric waveguide, and a large mode field size dielectric waveguide to interface with an external optical device, such as an optical fiber. The large mode field size dielectric waveguide is optically connected to the low minimum bending radius dielectric waveguide on the optical chip.

The invention provides an integrated natural circulating and baffling reactor, which comprises an agent-water mixing device, a reaction tank and an aeration device, wherein the reaction tank comprises a catalytic oxidation tank, an anaerobic tank and an aerobic tank which are arranged sequentially, the catalytic oxidation tank is connected with the rear end of a tube-type mixer, and up-and-down curved baffling channels are formed between the catalytic oxidation tank, anaerobic tank and aerobic tank; filler layers are separately arranged in the catalytic oxidation tank, anaerobic tank and aerobic tank and used for the catalytic oxidation, anaerobic and aerobic reactions; and wastewater is introduced into the reaction tank after being mixed with added hydrogen peroxide through a wastewater inflow pipe, and under the mating action of the aeration device, the wastewater is sequentially treated by catalytic oxidation, anaerobic and aerobic treatment and then discharged. In the reactor provided by the invention, a natural circulating and baffling manner is adopted and the catalytic oxidation, anaerobic and aerobic processes are integrated; and the reactor has the characteristics of compact structure, small occupation area, less energy consumption, low investment, strong shock load resisting capability, low operating cost and stable treatment effect.

In a concrete multi-factor durability experimental device under the action of the bend-pulling stress and the environment coupling, lower part of the pulling rod (6) is connected to a lower pressing board (9); the upper part of the pulling rod (6) presses a stress sensor (1) on the pulling board (2) via the screw cap (3) traversing the upper pressing board (5) and pulling board (2); a spring (4) is arranged between the pulling board (2) and the upper pressing board (5); concrete test pieces (8) are arranged between the upper pressing board (5) and the lower pressing board (9); a mat stick (7) is arranged between the concrete test pieces and between the concrete test piece (8) and the upper pressing board (5) or the lower pressing board (9); two sides of the concrete test piece (8) are arranged with a constant force holding meter (10); the constant force holding meter (10) is connected to the non-metal supersonic testing meter (11). The device is suitable for the big size concrete test piece, retaining the no stress loosing state in the process of loading in a long term.

The invention discloses an overflow-type heat exchanger of an urban sewage source heat pump system, relating to a heat exchanger of an urban sewage source heat pump system. The invention solves the problems that the traditional heat exchanging technology has complex process flow and large occupying area in order to realize anti-plugging. The overflow-type heat exchanger comprises a first medium channel connecting chamber, a second medium channel connecting chamber and a plurality of third medium channel connecting chambers, wherein two to four medium channels at the upmost end of a pipe shell assembly are communicated in parallel through the first medium flow connecting chamber to form a first medium channel group, and the first medium channel connecting chamber is close to a medium outlet; and two to four medium channels at the lowest end of the pipe shell assembly are communicated in parallel through the second medium channel connecting chamber to form a second medium channel group, the second medium channel connecting chamber is close to a medium machine inlet, and the plurality of third medium channel connecting chambers are used for serially connecting the second medium channel group, the first medium channel group and other medium channels together. The invention is suitable for the urban sewage source heat pump system.

The semi-automatic mechanized brick producing line with automatic block forming machine includes one board feeding machine connected to one automatic block forming machine and one elevator, one rotary platform following the elevator and with fork lift tracks, one bogie on the bogie tracks perpendicular to the fork lift tracks, fork lift tracks stretching into the curing kiln, and one fork lift on the fork lift tracks and capable of returning to the elevator. The production line of the present invention has less investment, low power consumption, no pollution and other advantages, and is suitable for use in middle sized and small brick making enterprises.

The invention aims at providing an automatic feeding and blanking system for a glass milling machine. A sheet unloading table and a sheet feeding table are arranged at the two ends of the milling machine respectively; an end part photoelectric sensor is arranged at the end part of the sheet unloading table; guide rails II are arranged on the lower sides of the two sides of the sheet unloading table and the sheet feeding table respectively and are connected with a grabbing mechanism and a stacking grabbing mechanism respectively; the grabbing mechanism arranged on one side of the sheet feeding table is used for feeding; the stacking grabbing mechanism arranged on one side of the sheet unloading table is used for stacking; control boxes are arranged on the two sides of the sheet unloading table and the sheet feeding table respectively and are connected with an electromagnetic valve set on the grabbing mechanism and a vacuum generator set on the stacking grabbing mechanism through data lines respectively so as to grab glasses in different sizes by utilizing zoning control; and the grabbing mechanism and the stacking grabbing mechanism have a same structure. The automatic feeding and blanking system for the glass milling machine has a simple structure and is in five-axis linkage of a mechanism, small in occupying area, flexible and convenient in operation, high in accuracy and strong in adaptability.

The invention discloses a bundling and winding integration packing machine. The bundling and winding integration packing machine comprises a rotating platform, a gantry frame, a bundling mechanism and a thin film winding mechanism. The bundling mechanism comprises a tape threading groove used for containing a strapping tape, a bundling machine head used for fixing the two ends of the strapping tape, and a telescopic arrow penetrating tape groove. The tape threading groove is formed in the gantry frame in the direction of the gantry frame. The arrow penetrating tape groove can communicate with two free ends of the tape threading groove when extending forwards so that a complete channel allowing the strapping tape to pass through can be formed. The thin film winding mechanism comprises a film rack which is used for placing a winding film in a sleeving mode and can control a thin film tension output device. According to the bundling and winding integration packing machine, the longitudinal and transverse bundling and winding technology can be completed through one piece of equipment, the floor area of the equipment is small and efficiency is high; and moreover, the position of an arrow penetrating mechanism can be adjusted automatically, the winding and cutting-off technology of the winding film can be realized automatically, and the whole process is automatic.

The invention relates to a loess tunnel construction method, in particular to a collapse and sink intrusion limit construction method for treating a wind accumulated sand loess tunnel through a stride shed pipe. The problems of relatively larger construction space, high cost, long period, poor safety and the like of the current stride shed are solved by the method. The method comprises the following steps of: 1) treating ground surface cracks; 2) filling holes; 3) determining an arch replacing range; and 4) performing an excavating method by using a three-step method, setting a radial anchoring rod before the arch is replaced, and detaching a steel arc frame one roof truss by one roof truss after grouting and reinforcing. The excavating method comprises the following steps of: a, detaching a sink intrusion limit section primary support one roof truss by one roof truss by using an excavating machine vibrating hammer and a manual pneumatic pick, and after detachment, timely performing primary spraying to seal a surrounding rock; b, performing forepoling by using a dual-layer stride anchoring rod to form a stride shed pipe structure; c, spanning the steel arc frame, and tamping the stride foot-locking anchoring rod by using upper, middle and lower arc guide feet; and d, after detachment one roof truss by one roof truss according to the steps, timely supporting. The method has the advantages of high construction speed, small required space, simple and convenient operation, low mechanical investment, guarantee in construction quality and safety and wide application range.

The invention belongs to the technical field of building construction tools, and particularly relates to a multifunctional safety protection device for high-rise building construction. Aiming at the problem that existing safety protection devices are unitary in function, the following scheme is put forward, the safety protection device is mounted on a wall and comprises a supporting plate, two supporting rods are hinged in the middle of the bottom end of the supporting plate and respectively positioned on two sides of the supporting plate, the other end of each of the supporting rods and the supporting plate is connected with a fixing plate, the supporting rods and the fixing plates are hinged mutually, the supporting plate and the fixing plates are welded mutually, the fixing plates are fixed on the wall through first screws, and a separating frame and an extensible stand which are perpendicular to the supporting plate are arranged at the top end of the same respectively. The multifunctional safety protection device is diversified in function, falling of workers is prevented, damage caused to construction personnel by falling silt or cobble is prevented, elastic support can be provided to personnel who slips and falls, and personal injury caused to building personnel or irrelevant personnel by objects falling from high altitudes is prevented.

The invention discloses a mechanical stereo garage and an automobile conveying method thereof. The mechanical stereo garage comprises a getting in and out garage room, an electric control room, multi-layer parking places, a lifting system, a rotary transverse moving vehicle, an automobile conveyor, a lifting driving system, a transverse moving driving system and a conveying system, and the lifting system comprises a lifting platform. The mechanical stereo garage is characterized in that the lifting platform of the lifting system is provided with a running rail where the transverse moving vehicle moves transversely; the transverse moving vehicle is provided with a rotary structure; the rotary structure comprises a rotary frame, a rotary support, a gear and a conveyor running rail. As lifting, transverse moving and turning around of automobiles can be completed synchronously, automobile taking and storing time is shortened by means of the stereo garage, the number of devices is decreased, the site area of the getting in and out garage room is reduced, the number of fault occurring points is decreased, and positive social economic significance and definite technological advance are achieved.

The invention discloses a mobile terminal and a communication processing method thereof. The mobile terminal comprises a shell, which is made of metal material and comprises a top shell, a middle shell and a bottom shell, wherein gaps are formed between the top shell and the middle shell and between the middle shell and the bottom shell; at least a MIMO antenna is arranged in the accommodating space of the shell; a ground port and a feeding port corresponding to the MIMO antenna are correspondingly arranged in the accommodating space of the shell; a matching circuit corresponding to the ground port and a matching circuit corresponding to the feeding port are also arranged in the accommodating space of the shell; a controller and a wireless communication unit are also arranged in the accommodating space of the shell; the controller is used for controlling the states of the ground port and the feeding port, adjusting the matching circuit corresponding to the controlled ground port and the matching circuit corresponding to the feeding port, and controlling the wireless communication unit to perform communication of different frequency bands via the corresponding antennas. With the implementation of the mobile terminal and communication processing method thereof, the communication of various types of antennas of the all-metal mobile terminals can be achieved.

A micropump according to the invention uses axially oriented pistons to define a pump volume. Translating the pistons axially with respect to each other within a pump housing draws a metered amount of fluid into the pump volume from a reservoir port for delivery to a cannula port when the space is collapsed. Radially situated seals on the pistons cooperate with the axial movement to close off and open the cannula port and the reservoir port respectively at different positions of the piston stroke.

The invention relates to a brand new public traffic system, in particular to an overhead miniature rail automatic public traffic system. The overhead miniature rail automatic public traffic system comprises automatic driving vehicles, overhead rails and a central control system, wherein the automatic driving vehicles are controlled by the central control system to run on the overhead rails, and the automatic driving vehicles are of miniature hanging type structures and hung on the overhead rails for running. Compared with the prior art, the overhead miniature rail automatic public traffic system has the advantages that the running mode similar to a point-to-point nonstop mode of taxies is directly adopted, a full-automatic running mode is adopted, therefore, the overhead miniature rail automatic public traffic system is small in occupied space, high in running speed, light in environment pollution, low in construction cost compared with metros and overhead roads, rapid, comfortable, safe, suitable for traffic requirements of various big cities and capable of completely relieving traffic pressure of the whole cities. In addition, the overhead miniature rail automatic public traffic system will become a technical revolution of public traffic systems.

The invention discloses a sewage treatment process and a special-purpose one-piece sewage treatment plant. The process comprises the following steps: 1) arrangement of a water inlet system: sewage input from an inlet pipe and pretreated by thick and fine gratings and a vortex-type grit chamber is sent into a biological reaction system; 2) arrangement of the biological reaction system: the biological reaction system is divided into an anoxic area, an anaerobic area, an aerobic area and a sedimentation area, and activated sludge in each area utilizes katabolism of microbes to converse organic matters into inorganic matters to realize nitrogen and phosphorus removal; 3) arrangement of the sedimentation basin: sludge and water in the treated sewage can be separated, so that the water outlet is clarified; and 4) arrangement of a disinfection tank: the treated water from the step 3) is disinfected to kill pathogenic organisms and then discharged through an outlet pipe. The invention also discloses a one-piece sewage treatment plant. The invention has the advantages of small land occupation, small investment, compact mechanism, low loss of a water head, low investment for the engineering project, optimized, stable and mature technology, good nitrogen and phosphorus removal effect and good organic pollutant removal effect.

The invention discloses a hot stamping and forming production line for aluminum alloy sheet materials. The hot stamping and forming production line comprises a destacker, a sprayer, heating furnaces, a pressing machine, a plate chain conveyor and an aging furnace, wherein the destacker is used for conveying the sheet materials to a feeding position to hand over to a manipulator; the sprayer is used for conducting lubricant spraying on the two surfaces of each sheet material; the heating furnaces are used for conducting heating and heat preservation on each sheet material with the two surfaces sprayed with lubricant; the pressing machine is used for conducting stamping and forming on the sheet materials subjected to solid solution treatment; the plate chain conveyor is used for receiving the stamped parts; and the aging furnace is used for conducting aging treatment on the parts. Each heating furnace comprises a feeding area, a hearth and a discharging area which are sequentially arranged, wherein the hearth is internally provided with at least one heating area and at least one heat preservation area; each layer of the hearth is provided with at least two sheet materials fed sequentially; heating of the interior of the hearth is in a nozzle mode; the feeding area and the discharging area are both rolling type lifting platforms; the heating area and the heat preservation area are both provided with multi-layer bi-directional rolling platforms; and the lifting height of the rolling type lifting platforms and the height of each layer of the multi-layer bi-directional rolling platforms are the same. According to the hot stamping and forming production line for the aluminum alloy sheet materials, hot stamping and forming can be conducted on the aluminum alloy sheet materials efficiently.

The invention provides an electronic adjustment control system which comprises a remote control device, link components and at least two electronic adjustment devices, wherein the remote control device and electronic adjustment controllers of the electronic adjustment devices are in star connection through the link components; and each electronic adjustment device is respectively arranged in a section of an electronic adjustment antenna to be used for adjusting a downward angle of the corresponding section. The downward angle of any appointed section of the electronic adjustment antenna can be controlled through one remote control device, and a control result or report can also be passed back and displayed on a display module of the remote control device. The electronic adjustment control method provided by the invention has the advantages that antenna information is configurable, the electronic adjustment antennae of multiple sections can be directly controlled, the operation is convenient and the like.

The invention discloses a rhinestone grinding and polishing machine, which comprises a center support and a plurality of working devices arranged in a ring around the center support along the process path of the rhinestone grinding and polishing, wherein a plurality of manipulators are arranged on the central swinging plate, and each manipulator is used for The rhinestone fixture in the previous working device along the rhinestone grinding and polishing process path among two adjacent working devices is transferred to the latter working device. The rhinestone grinding and polishing machine of the present invention uses universal fixtures, and utilizes the manipulator to transfer the fixtures, which overcomes the problem of docking process caused by the head assembly and the spindle turntable assembly of the prior art because of the non-stop rotation of the head assembly and the main shaft turntable assembly. The utilization rate of mature technical means is high, and the risk of technology research and development is small.

The invention provides a decompressing and drying device, which reduces the occupied area as a whole device and has a little heat influence on a substrate of non-heating at the same time of rapidly decompressing and drying. The decompressing and drying device (1) includes the function to decompress inside of a chamber (10) and a heating part (30) for heating the substrate (9) in the chamber (10). Therefore, the decompressing and drying device (1) is bale to heat the substrate (9) without carrying the substrate after decompressing and drying the substrate (9). Hence, the device can rapidly decompress and dry. In addition, since the heating process is in no need of other devices, the occupied area as a whole device can be reduced. Furthermore, the heating part heats the substrate (9) from up direction, so there is a little possibility that remaining heat at the time of non-heating influences on the substrate (9).

The invention relates to a support frame of an adjustable suspension scaffold, belonging to technical field of building construction. The support frame of the adjustable suspension scaffold comprisesa horizontal beam, a bracing and locating elements arranged on the horizontal beam at intervals. The support frame of the adjustable suspension scaffold is characterized in that one end of the horizontal beam is provided with a connecting lug; the other end of the horizontal beam is provided with a fixed plate of the horizontal beam; a first bolt hole for connecting a main body of a building is arranged on the fixed plate of the horizontal beam; the bracing consists of a first sleeve and a second sleeve; one end of the first sleeve is articulated with the connecting lug on the horizontal beamvia a first pin shaft; the other end of the first sleeve is inserted in one end of the second sleeve and fixed by an adjusting pin shaft; the other end of the second sleeve is articulated with a bracing fixed seat via the second pin shaft; and a second bolt hole for connecting the main body of the building is arranged on the bracing fixed seat. The invention has the advantages of reducing the occupied space, facilitating the transportation, storage and installation, having strong universality, saving material and improving the positioning precision of a scaffold upright.

The invention discloses a betel nut packing machine. The betel nut packing machine comprises a rack and a material supplying unit, a counting unit, a filling unit and a sealing unit which are arranged on the rack; the material supplying unit comprises vibration disks and flat vibration runners; the outlet end of each flat vibration runner is arranged above a stock bin in a staggered manner; the counting unit comprises optical fibers which are separately arranged on one side of the corresponding stock bin and are used for counting the number of betel nuts falling into the stock bins; the filling unit comprises overturning plates arranged at the bottom parts of the stock bins, overturning plate driving mechanisms and a material discharge funnel which is arranged below the overturning plates; and the sealing unit comprises a pair of bag pre-sealing mechanisms and a pair of heat-sealing mechanisms. According to the betel nut packing machine, the vibration disks and the flat vibration runners are adopted for material supplying, so that the problem that the betel nuts are difficult to count is effectively solved; and the betel nut packing machine is small in floor area and low in operation noise, so that the packing machine is applicable to use by different food enterprises and personal users. Furthermore, the betel nut packing machine is low in investment cost; the recovery of the investment cost is fast; and the betel nut packing machine can have very good application prospect if the market price of the packing machine is reasonable.

The invention belongs to the technical field of hydrometallurgy, in particular to a method for reclaiming gold and silver in tailings after roasting-cyaniding of gold concentrate. The method comprises the following steps: drying the tailings until the water content of the tailings is not higher than 10 percent by weight; adding desulfurizing agent and reducing agent to reduce for 10 to 30 hours at the temperature between 900 and 1,200 DEG C; discharging after the tailings are isolated from air and cooled; crushing the tailings subject to impurity removal by separation; carrying out acid-leaching the crushed metal iron powder to obtain ferrous solution; and extracting the gold and silver noble metals in the acid-leaching residue. The method has simple process and low requirement on raw materials, reclaims the valuable elements in the tailings with low production cost, not only reclaims the metal iron, but also effectively reclaims the gold, silver and other noble metals, reduces tailing pollution, and avoids resource waste.

The present invention includes a portable Sub-Surface Flow Constructed Wetlands system for removing pollutants from a body of water. The portable wetlands system includes a sealed container having pipes for the inflow and outlet of the water. The system also includes a high surface area substrate located in a lower portion of the container and a heavier substrate and at least one emergent aquatic plant located in an upper portion of the container. The container of the system may be mounted on a trailer and the entire system may be light enough to be capable of being towed by a normal mid-sized pickup truck. The present invention also contemplates a method for removing pollutants from water using such a portable wetlands system. The water to be treated is flowed through the portable wetlands system in order to remove pollutants. The present invention further contemplates a method for constructing such a portable wetlands system.

The invention relates to a low-temperature in-situ biaxial tensile mechanical property testing device and belongs to the field of mechanical property testing. A vertical structure is adopted, a stepper motor is connected with a precision ball screw through a coupling, rotation of a motor is converted into precise linear movement of a moving plate through transmission of a screw rod nut, and furthermore synchronous biaxial tensile loading of an X axis and a Y axis is achieved. A temperature loading module is refrigerated by using a semiconductor refrigerator, the temperature variation range is0-30 DEG C, and biaxial tensile mechanical property testing on a material under a temperature-variable condition is achieved. Together with an optical microscope, in-situ dynamic monitoring on micromechanical behaviors and damage mechanisms of test parts is implemented in the testing process. The device has the advantages that real service states of a material can be simulated, and the testing device is compact in structure, small in floor space and convenient to integrate and control and has great significances for mechanical property testing and research on materials at complex stress statesin low-temperature environments.

The invention discloses an electric heater for an indoor unit of an air conditioner. The electric heater comprises an electric heating element. The electric heating element comprises a heating part and radiation parts. An array consisting of the radiation parts is arranged on the surface of the heating part. The outer radiation edges, facing outside relative to the heating part, of the array consisting of the radiation parts are at least partially exposed in an outer space. The structure of the electric heating element is changed, so the electric heater decreases a space occupied by the heating part in the indoor unit of the air conditioner, reduces air supply resistance, increases a supply air rate, betters the radiation effects of the radiation parts, improves the performance of the indoor unit and reduces noises produced by the running of the indoor unit.