2139 results about "Laboratory oven" patented technology

The invention discloses a partial discharge and breakdown combined test system and test method under wide temperature range and variable air pressure, which are suitable for evaluating the insulating properties of insulating materials, cables and power equipment under high and low temperature and different air pressure conditions. The system comprises a vacuum oven, a partial discharge and withstand voltage breakdown joint test module, an explosion-proof cable joint, a control module and a detection module, the vacuum oven can realize temperature regulation and control from-70 DEG C to + 200 DEG C and an air pressure environment of 10 <-3 > Pa, and the test module integrates a high voltage generator, a coaxial electrode and a partial discharge sensor. Partial discharge detection and breakdown voltage measurement can be completed in the same test environment. According to the test method, the electrical response characteristics of the insulating material under different working conditions are obtained through regulation and control of environment temperature and pressure, execution of a test process and data acquisition and analysis. The device is compact in structure and high in safety, and has the capabilities of joint testing, high-precision regulation and control and adaptability to complex environments.

The invention provides a real-time monitoring control method and system for VOCs release of printing equipment. Real-time parameters in the printing process are monitored in real time, and a VOCs emission prediction value corresponding to the current printing task is obtained according to the real-time parameters in combination with the VOCs emission prediction model; the overprinting error of the current printing process is obtained according to the overprinting error detection strategy in combination with the reaction temperature and the treatment air volume of the current drying oven; the VOCs emission predicted value and the overprinting error are combined with a VOCs emission-printing quality double-target optimization function to obtain the air volume and temperature of a drying oven matched with the current printing quality and VOCs release; and regulating and controlling the air speed and the temperature of the drying oven of the printing equipment according to the air volume and the temperature of the drying oven matched with the current printing quality and the VOCs release. The system comprises a module corresponding to the method.

The invention discloses a multi-parameter cooperative temperature control system of an energy-saving industrial oven, and relates to the technical field of temperature control of industrial ovens, load data in the oven are collected in real time through a high-precision sensor, and a Kalman filter is used for cleaning, calibrating and filtering environmental noise and drift to obtain smooth and stable data; analyzing a real-time load based on a support vector regression model, capturing a nonlinear relation in combination with a radial basis function kernel, and predicting temperature recovery time and expected energy consumption; a reinforcement learning algorithm is adopted, a high-dimensional state space is analyzed through a deep Q network, the heating power and the airflow speed are dynamically optimized, and optimal control parameters are output; and the control module executes the adjusted setting, monitors the temperature and the energy consumption in real time, feeds back data to a prediction model and a learning strategy, and periodically updates parameters to adapt to load and environment changes. The adaptive capacity and long-term stability are remarkably improved, and the method is suitable for industrial scenes with load change, equipment aging or environment fluctuation.

The invention provides a tunnel oven control method and device, terminal equipment and a program product. The method comprises the steps that historical parameters and real-time parameters corresponding to multiple control points of a tunnel oven are obtained; the historical parameters comprise historical temperature data and historical atmosphere data, and the real-time parameters comprise real-time temperature data and real-time atmosphere data; predicting prediction parameters respectively corresponding to the plurality of control points at the future moment according to the historical parameters and the real-time parameters by utilizing a prediction model; the prediction parameters comprise predicted temperature data and predicted atmosphere data; determining target set values respectively corresponding to the prediction parameters by using a model prediction control model; the target set value comprises a target temperature set value and a target atmosphere set value; and the temperature and the atmosphere of the tunnel oven are controlled and adjusted according to the target temperature set value and the target atmosphere set value. The control efficiency of the tunnel oven can be improved, and the production efficiency and the product quality are improved.

The invention discloses a drying oven temperature control system and method, the system is provided with a temperature distribution detection module, a neural network training prediction module and a control optimization feedback module, and the method comprises the steps: obtaining tunnel drying oven temperature distribution data and related influence parameters, and carrying out the preprocessing; training an LSTM (Long Short Term Memory) network by utilizing the preprocessed temperature distribution data and related influence parameters, and predicting PID (Proportion Integration Differentiation) parameters in a temperature dynamic control process; the LSTM neural network model is integrated into an edge calculation unit of the tunnel oven temperature control system, and real-time online PID parameter prediction feedback is carried out; carrying out parameter setting on the predicted and output PID parameters, optimizing the parameters of a PID controller by adopting a particle swarm algorithm, and outputting an optimal PID parameter combination; the optimal PID parameter combination is applied to an actual tunnel oven temperature control system, the temperature uniformity of dynamic change disturbance in the system is improved, the temperature control precision is improved, and the overall response time is shortened.

The invention relates to a preparation method of a porous polyimide low-dielectric material. The method comprises the following specific steps: preparing a polyamide acid solution with a certain solid content under an ice-water bath condition; after the solution is recovered to normal temperature, adding a certain amount of sodium alginate, and after the solution is homogenized, adding a catalyst and a dehydrating agent for chemical imidization; the method comprises the following steps: coating a substrate medium with a solution after a certain time of reaction, standing in air for a certain time, sequentially and respectively placing the substrate medium in ethanol and a hot water bath for replacement for a certain time, airing at normal temperature, and transferring to a high-temperature oven for gradient cyclization to realize complete imidization. According to the method, conditions are mild and easy to control, and the low-dielectric film material which is flat in appearance and ordered in structure is prepared only through a normal-pressure drying method.

The utility model discloses a perforated flow guide air plate for wet spunlace drying, which comprises an upper-layer flow guide air plate and a lower-layer flow guide air plate, the upper-layer flow guide air plate and the lower-layer flow guide air plate are both mounted in a drying oven, the upper-layer flow guide air plate is mounted at the upper part of the drying oven, and the lower-layer flow guide air plate is mounted at the lower part of the drying oven. And the lower-layer flow guide air plate is mounted at the lower part of the drying oven. Due to the unique penetrating type design, hot air can directly act on the surfaces of materials, the drying time is greatly shortened, and meanwhile energy consumption is reduced.

The embodiment of the invention provides an oven system and an oven system current collector passing control method, and relates to the field of control. The system comprises a box body, a drying cavity is formed in the box body, and a current collector inlet and a current collector outlet which are communicated with the drying cavity are formed in the box body; the traction device penetrates through the drying cavity; the fixing part is connected with the traction device; the controller is configured to control the coating system to push the first fracture section of the current collector out of a first side outside the box body and pull the second fracture section of the current collector out of a second side outside the box body under the condition that the current collector is fractured, the second side is one side opposite to the first side, and the first side or the second side is the inlet side of the current collector; and the traction device and the fixing component are controlled, and the first fracture section fixed to the fixing component is pulled to penetrate through the drying cavity.

A test system has ovens configured to hold devices under test (DUTs), DUT switches, each connected to the DUTs in an oven, splitters, each splitter connected to a DUT switch, an instrument switch connected to one output of each splitter, the other output of each splitter connected to a test instrument, and one or more processors to control the instrument switch to select one of the DUT switches connected to an oven, control the selected DUT switch to connect each DUT in the oven to a channel of the test and measurement instrument, use machine learning to tune the DUT to a set of parameters until the DUT passes or fails, repeat the connecting, tuning, and testing of each DUT until all DUTs in an oven have been tested, and repeat the selection and control of the DUT switches until each DUT in each oven has been tuned and tested.

The drying oven comprises an air inlet chamber, a drying chamber, a plurality of rotary workbenches arranged in the drying chamber at intervals and a driving assembly arranged in the drying chamber, a heating device is arranged in the air inlet chamber, a first air inlet is formed in the drying chamber, and a second air inlet is formed in the drying chamber; the heating device is suitable for generating hot air and leading the hot air into the drying chamber, an air outlet is formed in the top of the drying chamber, the rotary workbench is suitable for placing materials, partition plates corresponding to the rotary workbench are arranged in the drying chamber, the rotary workbench is rotationally arranged on the corresponding partition plates, and the air outlet is formed in the top of the drying chamber. And hot air passes through all the rotary workbenches from bottom to top through the first air inlet, the driving assembly comprises a rotating mechanism and a plurality of different-direction mechanisms corresponding to the rotary workbenches, and the contact area between the materials and the hot air is increased by arranging the materials on the multiple layers of synchronous different-direction rotating workbenches for drying and disturbing airflow.

The invention discloses a suspension type oven flow field optimization method based on CFD dynamic simulation. The invention relates to the technical field of data processing, and the method comprises the steps: constructing a three-dimensional model of a suspension type oven flow field, and splitting the three-dimensional model into a plurality of geometric subdomains according to functions; dividing a corresponding grid sub-domain based on each geometric sub-domain; the grid subarea at least comprises a suspension area; judging whether the quality of the grid subdomains reaches the standard or not, and if not, optimizing division of the grid subdomains; if yes, setting a boundary condition and a physical model for the grid sub-domain; performing flow field simulation analysis on the grid sub-domain to obtain simulation data; comparing and analyzing the simulation data and the multi-dimensional target data to judge whether the model parameters of the oven flow field need to be corrected or not; whether the dynamic key indexes of the oven flow field reach the standard or not is monitored, and if the dynamic key indexes all reach the standard, optimization parameters of the oven flow field are output; and if any dynamic key index does not reach the standard, correcting the model parameters of the oven flow field, thereby improving the suspension stability of the material and realizing the optimization of the oven flow field.

The invention discloses a preparation method and application of circumferentially limited supercritical foaming self-packaging TENG, and the preparation method comprises the following steps: uniformly mixing a PDMS precursor and a curing agent, pouring the mixture into a mold, and putting the mold into a vacuum oven for curing to obtain a PDMS film; adhering the PDMS film to the middle position of the PI film through a double-sided nickel conductive adhesive tape, then putting the PDMS film into a mold, putting a thermoplastic elastomer on the upper layer, and performing hot pressing by using a vacuum auxiliary hot press to obtain a prefabricated sample; putting the prefabricated sample into a supercritical foaming reaction kettle, controlling the temperature to 70-130 DEG C, injecting supercritical fluid into the foaming reaction kettle, after the prefabricated sample and the supercritical fluid form a saturated and stable blending system, maintaining for 0.8-1.5 hours, taking out the blended system, and naturally cooling to room temperature, so as to obtain the TENG. The preparation method has the beneficial effects that the self-assembled and self-packaged TENG with the bionic dome structure is successfully prepared through cooperation of a supercritical fluid technology and a limited foaming strategy, and the technical scheme of the self-assembled and self-packaged TENG obtains breakthrough progress in the aspects of the preparation process, the structural design and the environmental adaptability.

The utility model discloses a continuous pressure maintaining device for a Halbach magnetic assembly. The continuous pressure maintaining device comprises a bottom plate, a first material pushing device, a second material pushing device, a locking device and a jig used for placing the Halbach magnetic assembly. The first material pushing device is arranged on one side of the bottom plate in a sliding mode, the second material pushing device is arranged on the other side of the bottom plate in a sliding mode, the first material pushing device and the second material pushing device are each provided with a locking device, and a jig is placed between the first material pushing device and the second material pushing device. The first material pushing device and the second material pushing device are used for sliding, pushing and abutting against the two ends of the Halbach magnetic assembly on the jig correspondingly, and limiting is conducted through the locking device so that continuous pressure maintaining of the Halbach magnetic assembly can be achieved. The first material pushing device and the second material pushing device respectively push and abut against the two ends of the Halbach magnetic assembly on the jig in a sliding mode, the locking device is used for limiting so as to achieve continuous pressure maintaining, the structure is simple, the size is small, glue curing can be accelerated through equipment such as a drying oven, and production efficiency is improved.

The invention provides a drying oven and coating drying equipment, and belongs to the technical field of batteries. The drying oven comprises an oven body, an infrared heating assembly and an air supply chamber, and the oven body is provided with an air inlet and an air outlet; the infrared heating assembly is arranged in the box body and used for emitting infrared rays so as to heat a to-be-dried pole piece conveyed into the box body in the pole piece conveying direction; the air supply chamber is arranged in the box body, the air supply chamber is communicated with the air inlet, the air supply chamber comprises a first sub-air chamber, a second sub-air chamber and a communicating chamber for communicating the first sub-air chamber with the second sub-air chamber, the air supply chamber is provided with an air blowing part for facing a to-be-dried pole piece, and the air blowing part is arranged in at least one of the first sub-air chamber and the second sub-air chamber; the air inlet is used for conveying air flow into the air supply chamber so that the air flow can be blown to the to-be-dried pole piece through the air blowing part and flow out of the box body through the air outlet. According to the drying oven, heat can directly act on slurry on the pole piece to be dried through the infrared heating assembly, and the drying efficiency is high.

The invention provides automatic heat treatment equipment for an automobile brake pad, and belongs to the technical field of brake pad machining. Comprising a base, a support is fixedly connected to the top of the base, a control center is fixedly connected to the end of the support, a feeding table is fixedly connected to the right end of the surface of the base, a clamping jaw is slidably connected to the top of the support, a preheating bin is fixedly connected to one side of the feeding table, and a drying oven is fixedly connected to one end of the preheating bin; the interior of the drying oven is rotationally connected with a material placing frame, and the top of the drying oven is fixedly connected with an air blower. By arranging the feeding position correcting assembly and the scraper containing assembly, position correcting, carding and straightening are carried out in the brake pad conveying process, the conveying process is accelerated, the blocking risk in the automatic treatment process is reduced, chippings and impurities on the surface of the brake pad are scraped, and the production efficiency is improved. Local hot spots formed on the surface of the brake pad or heat conduction hindering during later baking are reduced, and the heat treatment quality is improved.

The utility model discloses a drying tunnel curing system for composite paper, which is used for jet drying of the composite paper in a drying tunnel and comprises at least four drying ovens sequentially connected along a production line, and all the drying ovens form the drying tunnel for jet drying of the composite paper. An air inlet and an air outlet are respectively formed in two sides of the upper part of each drying oven; a plurality of nozzles for jetting and impacting hot air on the composite paper coating are uniformly arranged in the upper space of the drying oven between the air inlet and the air outlet; an air outlet is further formed in the lower space of the drying oven; a fan, a heating box and a heat exchanger are arranged beside each drying oven, an air outlet of each drying oven returns air to the heating box through an air return pipe, the fan is connected to one side of the heating box, and the output end of the fan is communicated with the air inlet of the drying oven through an air inlet pipe; the other side of the heating box communicates with a heat exchanger through a pipeline, and the heat exchanger is connected with a fresh air inlet pipe, a first air exhaust connecting pipe communicating with an air exhaust opening of the drying box and a second air exhaust connecting pipe for sending out air in the first air exhaust connecting pipe.

The invention relates to the technical field of water flooding gas reservoirs, in particular to a rock core displacement fluid saturation testing method and a testing device thereof.The method comprises the steps that S1, the original formation pressure and temperature of a gas reservoir are obtained; s2, obtaining a rock core, and testing physical property data of the rock core; then carrying out nuclear magnetic testing on the rock core; s3, saturating the rock core with formation water, and then carrying out nuclear magnetic testing; s4, carrying out gas drive water seepage test on the rock core according to the data in the S1, and obtaining the drive water quantity; s5, performing nuclear magnetic test on the depleted rock core; s6, obtaining the irreducible water saturation of the depleted rock core according to the nuclear magnetic test results of the steps S2, S3 and S5; s7, the total irreducible water saturation of the rock core is obtained according to the rock core physical property data, the displacement water amount and the irreducible water saturation of the rock core after exhaustion; the device comprises a drying oven, a first container, a second container, a core holder, a confining pressure pump, a displacement pump, a back pressure assembly, a receiving container and an electronic balance. The accuracy of fluid saturation determination can be improved.

The invention relates to the technical field of silicon carbide boat support manufacturing, and particularly discloses a silicon carbide boat support and a manufacturing method thereof.The manufacturing method comprises the following steps that S1, the boat support is designed through three-dimensional modeling software; s2, uniformly mixing the silicon carbide powder with various particle sizes; s3, slurry preparation: stirring and mixing the powder and a curing agent to obtain slurry; s4, the three-dimensional model slices of the boat support are printed and formed through a 3D printing device, and glue is smeared between every two layers of slices; s5, performing hot air drying on the blank in a drying oven; s6, in a vacuum sintering furnace, the blank is subjected to vacuum sintering and glue discharging; s7, the blank is subjected to polishing, machining, sand blasting, purification, ultrasonic cleaning and drying process treatment; compared with traditional injection molding, the silicon carbide boat support is manufactured through 3D printing, mold production and manufacturing can be omitted, and the production cost is reduced; and various forming parameters are visualized, so that the forming difficulty is reduced, and the yield of the silicon carbide boat support is improved.

The invention provides a multi-physical field coupled roasted eel cooking degree prediction and real-time temperature control system and method. The system comprises a tunnel type oven, an image acquisition module, an image synchronization and fusion module, a carbonization identification module, a temperature correction module, a cooking degree prediction module, a partition temperature control adjustment module, a conveyor belt speed control module and a system controller. The system fuses hot air convection and infrared radiation to form a coupled thermal field, obtains multi-mode information of a fish body by combining visible light and infrared imaging, realizes thermal-optical field collaborative perception through image fusion, carbonization identification and temperature correction, constructs a deep cooking degree prediction model based on multi-source features, drives thermal control and dynamic adjustment of a conveying strategy, and realizes deep cooking degree prediction. The accurate evaluation of the cooked degree of the roasted eel and the active intervention of the carbonization trend are realized, and the roasting uniformity and the product consistency are obviously improved.

The invention discloses an online moisture detection method and system for battery baking, and relates to the technical field. The method specifically comprises: acquiring inherent characteristics of a battery; in the breathing cycle process of baking the battery, temperature parameters and vacuum degree parameters in the baking oven in different time periods are collected; according to the change rate of the vacuum degree in the drying oven, the average temperature value and the absolute vacuum degree value in the drying oven and the inherent characteristics of the battery, a relation model of the moisture value and the change rate of the vacuum degree is constructed; temperature parameters and vacuum degree parameters of multiple moments in the drying box in the drying process of the to-be-detected battery are obtained in real time, the inherent characteristics of the to-be-detected battery are obtained, and the moisture value content of the to-be-detected battery at the target moment is obtained according to the relation model of the moisture value and the vacuum degree change rate. The invention discloses a battery drying device, and aims to accurately detect the moisture content in a battery in real time and dynamically adjust the drying process in the battery drying process, so that the automation degree and the production efficiency of equipment are improved while sufficient drying of the battery is ensured.

The invention discloses a multi-section baking method for a roll core, which comprises the following steps: S1, putting a pole piece into a baking oven, and preheating the baking oven; s2, sectional type vacuum drying, wherein three sub-stages are included, and the vacuum degree of a drying oven in each sub-stage is decreased progressively; s3, vacuum circulation drying is conducted, specifically, operation is conducted for at least 10 times or below in a circulation mode, the oven is vacuumized to 180-200 Pa, and vacuum drying is kept for 30-60 min; introducing inert gas into the oven to adjust the pressure to 90000Pa, and drying for at least 30 minutes. According to the method, multiple circulation stages of vacuum drying are split, incremental negative pressure is adopted in the first three cycles, most of water in the pole piece can be effectively brought out, finally, the pole piece is kept at a proper negative pressure level for drying, and the interface yield of the pole piece is guaranteed.

The invention discloses an intelligent temperature and humidity control method applied to a process oven. The method comprises the following steps: analyzing future temperature and humidity predicted values in real time by adopting a dynamic prediction module; and the predicted value is simultaneously input to a dew point risk avoidance module and an MPC optimization module. The current dew point temperature is calculated through the dew point risk avoiding module, dew point risk judgment is conducted in combination with the material surface temperature monitored by the infrared sensor, and when it is detected that the surface temperature is close to a dew point threshold value, an instruction is sent to the gradient air supply control module. And the MPC optimization module performs rolling optimization on the air supply parameters through an objective function based on the predicted value. Therefore, the fuzzy-PID module is helped to dynamically adjust PID parameters, and accurate execution signals are output to a heater and a fan. The gradient air supply control module integrates the dew point risk instruction and the PID control signal, the oven is divided into a plurality of independent areas to execute differential regulation and control finally, the control precision of intelligent regulation of the operation state of the process oven is increased, and energy consumption is remarkably reduced.

The invention discloses a high-temperature-resistant sealing agent and a preparation method thereof, and relates to the technical field of chemical assistants, and the high-temperature-resistant sealing agent is characterized by comprising the following components in parts by weight: 25-32 parts of acidic nano silica sol, 56-65 parts of a cosolvent, 8-12 parts of a hydrolysis inhibitor, 9-12 parts of a silane coupling agent A, 5.5-6.8 parts of a silane coupling agent B and 0.01-0.015 part of a wetting agent. The high-temperature-resistant sealing agent has the effects that the high-temperature-resistant sealing agent is not yellowed, decomposed and dropped after being baked for 2 hours in an oven at the temperature of 250 DEG C, and is not corroded after being corroded by salt mist for 1000 hours.

The utility model provides a three-in-one self-bonding curing tool for self-bonding electrical steel, which belongs to the field of curing tools, and comprises a lower base plate, a supporting mechanism, an elastic pressing mechanism, an upper pressing plate and a clamping mechanism, in the scheme, a spring can be compressed through the movement of a nut, so that the spring is compressed, and the curing efficiency is improved. According to the self-bonding curing tool, the upper pressing plate can tightly press and cure the iron core through the pressing spring, when the whole device is placed in a drying oven to be heated, the purpose of curing the iron core is achieved by utilizing the pressure of the spring of the tool to heat and pressurize while heating in the heating process, and the self-bonding curing tool is simple in structure and convenient to use. The production efficiency and the bonding strength of the three-in-one self-bonding electrical steel are greatly improved, the dimensional tolerance and the form and location tolerance of the iron core can be greatly improved, and the problem that in the prior art, after the iron core is fixed in an iron core curing tool and placed in a drying oven to be heated, the iron core curing tool can only play a role in fixing the iron core, and the iron core curing tool cannot fix the iron core is solved. And heating and pressurizing cannot be performed at the same time, so that the curing effect is improved.

The utility model discloses a drying oven capable of reducing vibration, which comprises an oven body, at least one fan and at least one group of heat generators, and is characterized in that the oven body is provided with a feeding end and a discharging end; a mounting cavity is formed between the feeding end and the discharging end of the box body, a group of air outlets communicated with the mounting cavity are further formed between the feeding end and the discharging end of the box body, and an air return channel separated from the mounting cavity and at least one air return hole communicated with the air return channel are further formed in the box body; the section size of the mounting cavity in the vertical direction is gradually reduced from the position where the fan is mounted to the discharging end in the direction from the feeding end to the discharging end; the fan is arranged in the mounting cavity, close to the feeding end, of the box body, and the air return channel is close to the feeding end and is communicated with an air inlet of the fan; and the heat generator is also arranged in the mounting cavity and is positioned on a flowing path of flowing air formed by the fan.

The method comprises the following steps: preparing an epoxy sample with a bidirectional strain gauge, carrying out multi-stage thermal cycle treatment on the epoxy sample, and recording strain data to determine an optimal treatment parameter combination, namely temperature, heat preservation time, cooling rate and cycle index; carrying out stress reduction treatment on the epoxy composite insulator based on the optimal treatment parameter combination; the device comprises a programmable oven, a strain gauge and an upper computer. The method is easy and convenient to operate and low in cost, through multi-scale collaborative optimization, the residual stress of the current commercial epoxy composite insulating part can be remarkably reduced, the reliability of the epoxy composite insulating part for the ultra / extra-high voltage power equipment is remarkably improved, and the method has wide engineering application prospects.

The utility model relates to the technical field of grinding, in particular to a full-automatic thickness measuring six-axis grinding, cleaning, coating and drying all-in-one machine which comprises a rack, a conveying mechanism, a grinding mechanism, an adjusting mechanism, a drying oven assembly and a cleaning mechanism. According to the utility model, a plurality of procedures such as grinding, cleaning, coating, drying and the like are integrated in one device, so that full automation and continuity of workpiece treatment are realized. And the time and the cost for transferring the workpieces among different devices are greatly reduced, and the overall production efficiency is improved. The cleaning mechanism is located between the grinding mechanism and the drying oven assembly, the surface cleanliness of the workpieces before the workpieces enter the drying oven is guaranteed, the burden of the follow-up cleaning procedure is further reduced, and the overall treatment efficiency is improved. The drying oven assembly not only has a drying function, but also integrates the functions of cleaning and coating release liquid. The workpiece treatment process is simplified, the number of devices and the occupied area are reduced, and meanwhile the treatment quality and consistency are improved.

The invention provides a drying oven with return air provided with a purification assembly and film stretching equipment. The drying oven comprises an oven body, a first air supply assembly, a second air supply assembly, a first blocking structure and a second blocking structure. The first blocking structure and the second blocking structure are arranged in the box body in the front-back direction of the box body and divide the box body into a first air return area, an air outlet area and a second air return area. The first air supply assemblies and the second air supply assemblies are alternately and symmetrically arranged in the front-back direction of the box body. An air inlet of the first air supply assembly is located in the first air return area, an air inlet of the second air supply assembly is located in the second air return area, and air outlets of the first air supply assembly and the second air supply assembly are both located in the air outlet area; a first purification assembly and a second purification assembly are arranged on the first blocking structure and the second blocking structure and used for purifying return air; the design not only can improve the air circulation efficiency, but also can reduce the maintenance difficulty.

The invention discloses a preparation method of a single-crack sensor, and relates to the technical field of crack strain sensors, and the method comprises the following steps: 1, carrying out fluorination treatment on a silicon wafer in a closed container for 3 h to obtain a hydrophobic surface; 2, mixing the PMDS main agent and the curing agent according to the mass ratio of 10: 1, and then stirring the mixture by using a centrifugal mixer until the mixture is uniform; after the mixture is uniform, putting the mixture into a vacuum chamber to eliminate bubbles; carrying out spin coating on the fluorinated silicon wafer at a speed of 150r / min for 60s, and drying in a drying oven at 80 DEG C for 2h to obtain a PDMS film; 3, cutting the PDMS film into long strips with the length of 30mm and the width of 7mm, and attaching a pre-designed metal mask structure to the central position of the PDMS; according to the invention, by controlling a single crack in the conductive layer, cracks are prevented from being generated at other positions, the SWCNT conductive network on the crack provides a stable conductive channel, and the prepared crack strain sensor has better stability while maintaining high sensitivity.

The present application provides an enamelled wire oven with an independent drying channel, which relates to the technical field of enamelled wire production. It includes: a box body, a painting component and a heat source. An accommodation through groove is formed in the box body. A plurality of partition plates are arranged in parallel at intervals on the groove wall of the accommodation through groove, and the accommodation through groove is separated into a plurality of drying channels by the plurality of partition plates; the painting component includes a plurality of painting units, and the drying channels correspond to the painting units one by one. Each painting unit can paint a single wire passing through it; each drying channel is communicated with the air outlet of the heat source, so that each drying channel can dry the wire painted by the corresponding painting unit. The present application has the effect of high drying efficiency.