40results about How to "Structural solution" patented technology

The invention discloses a cross-temperature health state assessment method and system for an underwater robot battery, and relates to the technical field of battery health state assessment, and the method comprises the steps: S1, collecting data in the operation process of an underwater robot; s2, an environment temperature profile is constructed, and working condition types are identified; s3, constructing a multi-dimensional health feature vector; s4, constructing an LSSVM and SVR regression model, and optimizing model hyper-parameters; s5, calculating characteristic stability and comprehensive complexity indexes, and adaptively selecting a model; s6, identifying the working condition category of the charge-discharge cycle, extracting and standardizing the features, calling the adaptive model, iteratively outputting SOH estimated values, and splicing to form an SOH evolution curve; according to the cross-temperature health state evaluation method and system for the underwater robot battery provided by the invention, the problems of unstable cross-temperature performance and insufficient generalization ability in the prior art are solved.

This application discloses an excavator piling mechanism for easy piling, belonging to the field of water conservancy engineering construction. It includes a mounting base, a clamp, a vibrator, a piling head, and a limiting ring. The mounting base is mounted on the excavator boom, the clamp is mounted on the side of the mounting base, the vibrator is fixed inside the mounting base, the piling head is mounted on the output end of the vibrator, and the limiting ring is mounted on the bottom end of the piling head. A limiting space is formed between the inner wall of the limiting ring and the end of the piling head to restrict the movement of the pile end. This application can effectively improve the efficiency of river piling, accurately control the insertion position of the pile, ensure the verticality of the pile, and avoid structural problems caused by uneven stress.

This invention discloses a method for 3D mesh reconstruction of buildings from multispectral LiDAR point clouds, belonging to the field of multispectral LiDAR point cloud processing technology. The method includes: extracting building instances from the input point cloud using a multispectral LiDAR point cloud classification method; extracting geometric features from the height map obtained from the building point cloud, and then extracting spectral features from the spectral map using a spectral adaptive convolution module; inputting the data into a spectral-geometric fusion module to fuse the features of the spectral map and the geometric map to achieve accurate prediction of 2D corner points; projecting the 2D corner points onto the height index of the height map to obtain 3D corner points, and using an attention mechanism jointly guided by multispectral and geometric features to predict the boundary structure of the 3D corner points, generating a wireframe model; finally, achieving seamless and watertight 3D mesh reconstruction of the building under the guidance of the topological relationships contained in the wireframe model. This invention can effectively reduce artifacts and planar misalignment problems during the reconstruction process.

The invention relates to a cobalt-free ultra-high nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: ball-milling and mixing a nickel source, a lithium source and a dopant to obtain powder, and drying and sintering the obtained powder to obtain the cobalt-free ultra-high nickel positive electrode material, the doping agent comprises an aluminum-containing doping agent and a manganese-containing doping agent; the nickel source, the lithium source and the doping agent are mixed according to the molar ratio of the nickel element to the lithium element to the total doping element being (0.90-0.98): (1.03-1.06): (0.02-0.10). The Al and Mn elements are uniformly doped in the positive electrode material substrate through a solid-phase reaction method, the material performance is synergistically improved by utilizing the unique action mechanism of the doped elements, the electrochemical performance is synergistically improved on the premise of not depending on the cobalt element, and high initial discharge capacity, cycling stability and rate capability are kept in a wide voltage interval; and excellent capacity retention capability is shown in a wide multiplying power range.

This invention discloses an insulating encapsulation structure and connection method for a probe temperature sensor, relating to the field of temperature sensor technology. The insulating connection bracket has an outer insulating and thermally conductive protective layer, and contains insulating adhesive and a temperature-sensing component. The specific implementation is as follows: an insulating layer assembly, a built-in snap-fit ​​structure within the insulating connection bracket, and an eccentric cavity for housing the temperature-sensing component. A thermistor glass body is used as the insulator. In the insulation process, direct contact between the glass body and the inner wall of the bracket reduces one useless insulating layer. The cavity formed by the end of the insulating connection bracket and the insulating layer assembly houses the temperature-sensing component. The cavity contains a clearance structure for the thermistor pins and multiple layers of insulation between the pins and the conductive copper wires. A fluid insulating adhesive is used, and then the insulating connection is cured. Finally, the encapsulation is placed inside a metal shell containing insulating adhesive and cured, thus forming multiple layers of effective insulation and sufficient safe insulation thickness between the thermistor conductive pins and the metal shell.

The invention discloses a method for constructing, updating and retrieving an action memory library, which belongs to the technical field of computer vision and comprises the following steps of: constructing a training data source with time sequence diversity; initializing an action memory library containing a plurality of learnable prototype matrixes and a double-flow interaction network; memory bank evolution is executed, an action prototype is retrieved by utilizing a query stream, a current memory state is dynamically generated by combining a memory state updating gate mechanism with a historical state, and dynamic memory is injected into a feature space by utilizing memory driving graph convolution; synchronously updating parameters based on multi-target loss, and driving a memory bank to evolve into optimal structured prior; and finally, performing structured reasoning on the to-be-detected sequence by using the optimal memory bank. According to the method, structured priori is constructed by mining a spatio-temporal topology mode of a human body action sequence, and hierarchical memory evolution and double-flow depth interaction are combined, so that the problem of depth ambiguity in a monocular vision task is effectively solved, geometric structure distortion is corrected, and the accuracy of action posture estimation is remarkably improved.

The application relates to the field of building equipment engineering and discloses a heating and ventilating pipe with a damping and buffering structure, which comprises a pipe body, a mounting plate is arranged on the side wall of the pipe body, a buffering assembly is arranged on the side wall of the mounting plate, and a fixed connection is arranged on the side wall of the pipe body; the buffering assembly comprises a damper, a damping pad is fixedly connected to the side wall of the mounting plate, a fixed frame is arranged on the side wall of the pipe body, a rubber pad I is fixedly connected to the side wall of the fixed frame, the side wall of the rubber pad I is in close contact with the side wall of the pipe body, and the damper is fixedly installed between the damping pad and the fixed frame. In the utility model, after vibration of the pipe body is transmitted to the buffering assembly through the fixed frame, the damping pad, the damper, the first spring and the like are synergistically acted, buffering is realized by absorbing and consuming vibration energy and adapting to angle change, the noise and structure fatigue problems caused by vibration transmission are solved, and the damping effect and stability of the pipe system are improved.

The invention relates to the technical field of power grid infrastructure projects. The invention discloses a structured design method and system for a feasibility research report of a power grid infrastructure project. The method comprises the steps of obtaining file data specified by related management of power grid infrastructure in a historical file library, and obtaining a structured text data set; performing structured information extraction on the text data set to obtain a structural framework set of the text; key review element extraction of the feasibility research content review rule is carried out on the text data set, and a key review element set is obtained; establishing logic association for each key review element, each node and each text in the text data set to obtain a mapping relation M of the key review element ID, the node ID and the text ID; according to the mapping relation M, a feasibility research report structure chart is formed, and a power grid infrastructure project feasibility research report template is created. The produced standardized template provides a solid and uniform data basis for treatment, integration and deep analysis of power grid data, thereby directly supporting scientificity and accuracy of investment decision.

This invention relates to the field of Internet audio data processing technology, specifically to a cross-terminal voice input and metadata repair method and system based on H5. The method includes: a data receiving step: receiving real-time segmented data streams and terminal environment fingerprints; a model building step: injecting the environment fingerprint to build an ideal model and generating a theoretical drift benchmark; a feature mapping comparison step: extracting real-world features and comparing them with the benchmark to determine the metadata deviation type; a repair execution step: adaptively verifying and repairing the data stream based on the deviation type; and a reconstruction generation step: rewriting the metadata header based on the repaired data payload to generate a standardized audio file. This invention, through reverse engineering using an ideal model, accurately distinguishes between hardware anomalies and network packet loss, improving the usability of Web audio acquisition in complex network environments.

This invention discloses a high-strength, high-conductivity beryllium copper alloy rod for limit switches and its manufacturing method, belonging to the field of electronic component manufacturing technology. Its chemical composition, by weight percentage, includes: Be: 0.10%–0.30%, Co: 0.10%–0.30%, Ni: 0.30%–0.50%, Si: 0.020%–0.040%, Mn: 0.05%–0.10%, Zr: 0.05%–0.10%, Ag: 1.00%–1.20%, RE: 0.0140%–0.0180%, Ag-SiC: 0.80%–1.20%, Cu-CNTs: 0.40%–0.80%, Pb ≤ 0.005%, Sn ≤ 0.005%, other impurity elements ≤ 0.01%, and the balance being Cu. The manufacturing method includes electroless plating of SiC and CNTs with Ag and Cu, respectively, followed by gas atomization powdering, mixing, vacuum hot pressing sintering, hot extrusion, cold drawing, and aging treatment to obtain rods. This invention achieves simultaneous improvement in strength and conductivity through the synergistic effect of low Be and metal cladding reinforcement. The finished product has a yield strength >1050MPa, tensile strength >1200MPa, elongation >4%, and conductivity >40% IACS.

The application discloses a kind of super-light inorganic high-efficiency thermal insulation materials and preparation method thereof.The super-light inorganic high-efficiency thermal insulation material of the application is mainly prepared by the following components by pressure foaming-decompression foaming process according to weight parts: light-burned magnesium oxide 28-37 parts, magnesium sulfate heptahydrate 18-26 parts, compound foaming agent 0.8-1.5 parts, compound foam stabilizer 0.08-0.12 parts, water reducing agent 0.1-0.3 parts, and water 45-58 parts.The application prepares inorganic high-efficiency thermal insulation material by pressure foaming-decompression foaming process.Under pressure conditions, a large number of stable and uniform bubbles are introduced into the inorganic thermal insulation material, then a large number of uniform and stable pressurized bubbles are mixed uniformly with cement slurry to obtain foamed slurry.In the process of pressure relief, the bubbles inside the pressurized foamed slurry expand uniformly, achieving super-light design.The bulk density of the prepared super-light inorganic high-efficiency thermal insulation material can reach 41-60 kg / m 3 , the strength is greater than or equal to 10 kPa, and the thermal conductivity can reach 0.029-0.035 W / (m·k).

The invention belongs to the technical field of compositions of high-molecular compounds, and discloses a polyurethane-based light composite material and a preparation method thereof. According to the composite material, a bio-based dynamic foaming regulating agent based on a carboxymethylated tannic acid derivative is introduced to have a synergistic effect with a micro-fluidic nucleation guide liquid, so that pH response triggering and spatial positioning nucleation are realized in a micro-fluidic chip, and a highly uniform closed-cell structure is formed. The obtained material is high in density and compression strength batch stability, low in heat conductivity coefficient, free of halogenated hydrocarbon and environmentally friendly. The invention provides a polyurethane-based light composite material which is controllable in structure, stable in performance and environment-friendly and a preparation method of the polyurethane-based light composite material. According to the method, through the synergistic effect of a bio-based dynamic foaming regulation and control system and a micro-fluidic nucleation guide technology, precise molding of a foam structure from a nucleation source is achieved, the inherent problem of a traditional foaming process between uniformity and greenness is broken through, and a technical means is provided for green manufacturing of a high-performance light composite material.

The application belongs to the technical field of building construction, and particularly relates to a kind of assembled cantilever frame systems, comprising the following steps: a load-bearing cantilever frame, which includes a plurality of horizontal rods and a plurality of inclined struts for supporting the horizontal rods, a pressure sensor is stored on any through-wall bolt to detect the pressure borne by the through-wall bolt; a load relief rope is connected with the pin hole on the horizontal rod of the load-bearing cantilever frame for load relief of the load-bearing cantilever frame, the load relief rope is fixed by a fixing device, and a tension sensor and an adjusting device are stored on the fixing device; a central control module is connected with the pressure sensor, the tension sensor and the adjusting device, and analyzes the real-time data detected by the sensors to determine whether to adjust the assembled cantilever frame structure. The application changes the load-bearing cantilever frame in the assembled cantilever frame system to an assembled structure, making the cantilever frame easy to assemble and disassemble.

The invention discloses a PDT base station multimode channel dynamic configuration method and system, and belongs to the technical field of communication. The invention mainly solves the technical problems that the existing PDT base station cannot dynamically allocate the channel resources according to the traffic tide due to the static binding relationship between the radio frequency carrier and the communication mode, and the mode switching needs to interrupt the service to restart the base station. According to the method, software function examples of multiple communication modes (TMO / RMO / DMO) are loaded in parallel in a base station memory, and a channel configuration center is used for generating a carrier recombination strategy based on real-time load monitoring. And the channel control unit is used as middleware, responds to an affiliation authorization instruction (SETAUTH), peels off the carrier affiliation right on a logic layer, and issues a service configuration instruction (NEWSVC) to the target mode instance. According to the mechanism, on the premise that radio frequency hardware is not reset, dynamic circulation and seamless multiplexing of physical carriers among different service modes are achieved, and the resource utilization rate and the service response flexibility of the base station are remarkably improved.

This invention discloses a time-series data partitioning and storage method for high-frequency acquisition systems, relating to the field of data storage management technology, and is used to solve the problem of dynamic imbalance in high-frequency write structures. This invention achieves rapid response and adaptive structural adjustment to sudden write loads in high-frequency acquisition systems by constructing a dynamic time-series data storage mechanism based on write pressure sensing and partition structure linkage. By constructing a sliding write rate sequence and a write pressure factor, it identifies write overload states, dynamically triggers the structural splitting operation of the main partition, generates sub-partitions with time boundaries and independent buffer paths, uses timestamp mapping and buffer utilization judgment to achieve load-balanced routing of write requests, and combines write activity and latency statistics to generate a structure merging evaluation factor. The partition structure is dynamically adjusted according to trend changes, enabling the write structure to match the system load, thereby improving the system's structural resilience and write efficiency in high-concurrency scenarios.

The double-row tapered roller bearing inner ring connecting structure comprises a first bearing inner ring and a second bearing inner ring which are coaxial and symmetrically arranged, a first sinking groove is formed in the inner wall face of the first bearing inner ring, and a first opening is formed in the position, on the end face of the first bearing inner ring, of the first sinking groove; a second sinking groove is formed in the inner wall face of the second bearing inner ring, and a second opening is formed in the second sinking groove in the end face of the second bearing inner ring; the first sinking groove and the second sinking groove are formed in the first bearing inner ring and the second bearing inner ring respectively, the embedded groove is formed after splicing, the limiting piece is tightly embedded in the embedded groove, mechanical self-locking is achieved through the embedded design, and the connection strength between the inner rings is greatly enhanced. Due to the existence of the limiting pieces, lateral force from different directions is effectively resisted, and relative rotation and displacement between the inner rings are prevented.

The invention discloses a method for quantifying impact force at an outlet of a back cavity of a vehicle-mounted open subwoofer, and relates to the technical field of vehicle engineering, and the method comprises the steps: constructing an acoustic simulation model, building a computational domain comprising a structural domain, an internal fluid domain and an external fluid domain, and generating a grid; setting medium parameters and boundary conditions, and applying excitation to a loudspeaker diaphragm; solving a sound field based on an acoustic control equation, and calculating a particle velocity vector by using a momentum conservation principle; extracting the maximum airflow velocity value of the section of the outlet of the inverter tube in a preset frequency range as a key quantitative index; and converting the index into a dynamic pressure load or a matching arrangement database, and outputting arrangement guidance data. According to the method, the acoustic simulation data are converted into the hydrodynamic indexes, so that quantitative evaluation of the airflow impact force of the inverter tube is realized, the arrangement design of peripheral parts is effectively guided, and abnormal sound and structural failure risks are avoided.

This application discloses a track-type movable light steel keel, relating to the field of building decoration and renovation technology. It includes a main keel and a secondary keel. The secondary keel is located at the bottom of the main keel, and a main lifting mechanism is located at the top of the main keel. The main keel includes a first keel and a second keel. This invention utilizes a first C-shaped groove 121 slidably connected to a bidirectional sliding block. This structure allows the first keel to flexibly adjust its spacing horizontally to adapt to the size requirements of different construction scenarios. Simultaneously, the second keel can be adjusted to move vertically to one side of the first keel through a second C-shaped groove 121 slidably connected to the bidirectional sliding block. This ensures the overall flatness of the frame while reducing installation time and effort, effectively improving installation accuracy. A ruler can assist construction personnel in accurately positioning the sliding block, ensuring adjustment accuracy and avoiding structural problems caused by installation errors.

The utility model relates to the technical field of ground scraping silica gel, in particular to ground scraping silica gel for a floor mopping robot, and adopts the technical scheme that the ground scraping silica gel comprises a scraping skin and a positioning part, the scraping skin and the positioning part are designed by adopting an integral forming technology, and a positioning groove and an inserting groove are formed in the scraping skin. The positioning groove and the inserting groove are used for mounting the ground scraping silica gel and the sweeping robot; the positioning part comprises a positioning bottom plate and a positioning edge, the positioning edge is arranged on the positioning bottom plate, and the positioning bottom plate is used for connecting the positioning edge with the scraping skin. The utility model has the advantages of stable structure and strong durability, and solves the problems that the structure is easy to break and the stability is poor in the traditional process.

The application discloses a reverse-docking forming assembly and belongs to the technical field of automobile part processing, which comprises a lower die plate, a mounting seat matched with a product to be processed is arranged on the lower die plate, a forming assembly is arranged at one end of the mounting seat, the forming assembly comprises a base and two symmetrically arranged first inclined joints, the two first inclined joints are respectively arranged on the left side and the right side of the base and are spaced apart from the base, movable inserts are arranged on the left side and the right side of the base, the left side and the right side of the base are inclined surfaces, the inner side of the insert is connected with the base as an inclined surface, and the outer side of the insert is used for forming the inner wall surface of the opening of the control arm, a nitrogen power piece is arranged between the base and the insert, and the nitrogen power piece drives the two inserts to be folded upwards along the inclined surface of the base. The application can form the reverse-docking structure of the control arm and smoothly demould, thereby improving the production efficiency and reducing the processing cost.

A kind of functional box of photothermal test strip detection and portable infrared thermal imaging tool;Functional box, comprising: cover, base, test strip placement table, moving drive mechanism and laser;Test strip placement table, moving drive mechanism and laser are respectively arranged in the functional area of base;Cover is detachably mounted on base, and covers functional area;Test strip placement table is used to place photothermal test strip;The output end of laser is towards test strip placement table, for irradiating the detection area of photothermal test strip;The output end of moving drive mechanism is connected to laser, for driving laser to move, so that the output end of laser moves to align the detection area of photothermal test strip;Cover is provided with detection port towards test strip placement table, and detection port is used to accommodate the detection end of hand-held infrared thermal imager.This scheme solves the problem that existing infrared thermal imaging equipment is large in structure and inconvenient to carry.

This invention discloses a cobalt-manganese-based catalyst with a core-shell structure, its preparation method, and its application. The catalyst comprises a core-shell molecular sieve support and cobalt and manganese elements supported on the support; the core layer of the support is a ZSM-5 molecular sieve, and the shell layer is a Beta molecular sieve, with a core-to-shell mass ratio of 1:(0.5-2). When the catalyst provided by this invention catalyzes syngas, the C content in the catalytic products is [not specified]. 8‑16 With a product content exceeding 65%, its carbon number distribution and molecular structure are closer to those of actual aviation kerosene, effectively solving the problems of poor selectivity and simple product structure in traditional Fischer-Tropsch synthesis of hydrocarbon-rich distillate oils. Furthermore, the catalyst of this invention exhibits a unique core-shell structure, providing excellent confined stabilization for the active metal and endowing the catalyst with superior long-term operational stability, demonstrating broad prospects for industrial application.

The invention provides an event camera real-time deblurring method based on dynamic edge guidance. The event camera real-time deblurring method comprises the following steps: acquiring a to-be-recovered blurred image and event stream data in the same field of view; extracting an image modal feature and an event modal feature by using a double-flow visual encoder; constructing a dynamic edge guiding module, predicting pixel-level multi-level fuzzy probability distribution, and generating a dynamic space edge priori graph; removing redundant background events by using an edge prior graph, and screening out a key event Token rich in motion information; and constructing a cross-modal fusion module based on bidirectional RWKV, carrying out long-distance space-time modeling on the screened event Token and image features with linear calculation complexity, and finally decoding and outputting a clear image. According to the method, the sensor noise is effectively suppressed and the calculation redundancy is reduced under the condition of not depending on the traditional hard gating through a'guide-selection 'normal form, and the image deblurring which is high in signal-to-noise ratio and high in structural similarity and meets the real-time requirement is realized.

This invention relates to a lithium iron phosphate composite electrode material and its preparation method, belonging to the field of electrode material technology. The preparation method of this invention significantly improves the electrochemical performance of the material through a wet-mixing precursor, modified carbon nanotube composite, and double-layer carbon coating process. The modified carbon nanotubes are treated with melamine, potassium hydroxide, and boric acid to achieve nitrogen / boron co-doping and surface functionalization, constructing efficient electron transport channels and shortening the lithium-ion diffusion path through a microporous structure; their high aspect ratio and improved graphitization effectively alleviate charge-discharge volume expansion and ensure high-temperature structural stability. The double-layer carbon coating consists of a polydopamine inner layer and a glucose-derived carbon outer layer. The inner layer strengthens the interface bonding through chemical bonding and guides uniform lithium-ion diffusion, while the highly conductive outer carbon layer provides a fast electron transport channel and mechanical protection, synergistically optimizing ion / electron transport efficiency.

A two-hand pull-rod binder includes a main body, a clamp, a pull-out component, and a binder cover. The clamp is located on the side of the main body and can slide laterally relative to the main body. The pull-out component is located at the end of the main body and can slide vertically relative to the main body. The vertical sliding of the pull-out component drives the clamp to slide laterally. The main body has a fixed half-ring, and the clamp has a movable half-ring that can engage with the fixed half-ring. By covering the main body and the clamp with the middle connecting surface of the binder cover, the fixed half-ring and the movable half-ring are exposed through the middle connecting surface, thus completely concealing the internal moving structure of the binder. This not only makes the product appearance cleaner and more aesthetically pleasing, meeting the integrated design requirements of modern stationery, but also effectively prevents the clamp from directly contacting the paper edge during lateral sliding, preventing paper wear, fuzzing, or wrinkling, and significantly improving the lifespan and integrity of the paper.

The present application belongs to the technical field of maintenance of high-speed railway ballastless track structure, and particularly relates to a method for repairing damage of expansion joint bed of high-speed railway ballastless track. The technical scheme is as follows: a method for repairing damage of expansion joint bed of high-speed railway ballastless track, comprising the following steps: S1: determining expansion joint structure design through finite element design calculation; S2: removing damaged part of expansion joint; S3: treating interface after removing damaged part of expansion joint; S4: placing expansion joint material according to expansion joint structure design of step S1; S5: pouring repair mortar in bridge section base area; S6: setting isolation layer on surface of bridge section base repair area; S7: pouring repair mortar in track bed area; S8: closing expansion joint caulking; and S9: closing surface of repair area. The present application provides a method for repairing damage of expansion joint bed of high-speed railway ballastless track.

The application belongs to the technical field of silicon carbide ceramic preparation, and particularly relates to a silicon carbide ceramic slurry based on DIW-3D printing, a silicon carbide ceramic product and a preparation method. The silicon carbide ceramic slurry is prepared from raw materials including the following components and weight contents: silicon carbide mixed powder 60-100 parts, thermosetting resin 10-40 parts, dispersing agent 5-15 parts and thermal initiator 0.01-1 part. The application realizes the application of DIW-3D printing in the preparation of silicon carbide ceramic through the synergistic effect of double-particle-size SiC grading, introduction of B4C sintering aid, special resin and dispersant system, thermal initiation and solidification, DIW rheological design and gas pressure sintering, saves the material cost in the manufacturing process, prepares a silicon carbide sample with excellent mechanical properties, and further widens the development of silicon carbide ceramic.

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses resin-based hard carbon microspheres for sodium ion batteries and a preparation method thereof, which comprises the following steps: mixing styrene, a crosslinking agent and a catalyst to prepare an oil phase, dispersing the oil phase in a polyvinyl alcohol aqueous solution, and preparing resin microspheres through micro-suspension polymerization; and then performing air atmosphere pre-oxidation and inert atmosphere carbonization treatment to obtain a target product. Through regulation and control of a micro-suspension polymerization formula and a step-by-step heat treatment process, a dense spherical structure with rich closed pores and a suitable interlayer spacing is constructed, and the technical problems of low tap density and easy melting collapse of pyrolysis of traditional resin-based hard carbon are effectively solved. The obtained hard carbon microspheres have uniform particle size distribution, extremely high tap density and excellent powder fluidity, simultaneously exhibit high reversible specific capacity, high initial efficiency and excellent rate cycle stability, and are suitable for large-scale commercial application.

The utility model discloses an electric valve and refrigeration equipment relates to refrigeration control technical field, wherein, the electric valve includes lower valve seat, upper valve seat subassembly and valve core subassembly, upper valve seat subassembly includes upper valve seat, bearing and screw rod, the first end recessed with guide groove of upper valve seat, the groove bottom of guide groove is provided with the mounting hole of the second end of upper valve seat, the screw rod is worn in the mounting hole, and is installed in the second end of upper valve seat through bearing, valve core subassembly includes nut, valve core and sealing washer, valve core is installed in guide groove, and one end of valve core is installed with nut, through the direct forming of guide groove in upper valve seat, need not use guide sleeve, sealing washer is directly set up in the periphery of valve core and is formed integral whole with it, need not set up pressure sleeve and so on spacing component to fix sealing element, when pushing valve core subassembly into guide groove, the nut can be automatic extension into mounting hole and cooperate with screw rod, need not promote valve core subassembly and carry out the joint of screwing, to solve the problem that the electric valve structure of current and assembly process is complex.