564 results about "Low load" patented technology

The invention relates to the technical field of dust collector control, and discloses a multi-motor cooperative speed regulation and energy efficiency optimization control method and device for a dust collector, and the method comprises the steps: monitoring the rotating speed, current, voltage, temperature and other operation parameters of a plurality of motors in real time, and determining the working load state of each motor through a load recognition model. Different cooperative speed regulation strategies are matched according to load states, such as PID control for low loads, fuzzy logic control for medium loads and model prediction control for high loads. A dynamic weight distribution algorithm is used for adjusting the target rotating speed, and an energy efficiency optimization algorithm is used for optimizing power distribution. Meanwhile, environmental parameters are considered, and control parameters are optimized through a self-adaptive parameter adjustment model. And the system also has the functions of adjusting strategies according to load fluctuation and power consumption, motor priority ranking during high load, energy efficiency algorithm parameter optimization, rotating speed adjustment during filter screen blockage, motor state monitoring and prediction and the like, so that accurate speed regulation and efficient energy conservation are realized, and the performance and the intelligent level of the dust collector are improved.

The invention discloses a secondary frequency modulation optimization control method under a low-load working condition, relates to the technical field of power grid resource optimization, and is used for solving the problem that a control strategy under the low-load working condition is not fully considered in the prior art. The current load interval is recognized, and control parameter correction is conducted on the unit located in the low load interval; calculating a total output power reference value; carrying out calculation by adopting a self-adaptive optimization algorithm, and carrying out power fine distribution to obtain an optimal charging and discharging instruction of each energy storage unit; and the output power is adjusted in real time through double-closed-loop control. The invention further discloses a secondary frequency modulation optimization control device under the low-load working condition, electronic equipment and a computer storage medium. By dynamically correcting the control parameters of the low-load thermal power generating unit and cooperatively distributing the hybrid energy storage power in combination with the adaptive optimization algorithm, the safety and economical efficiency of the energy storage system are guaranteed.

The invention relates to a reciprocating compressor. The reciprocating compressor may include a housing, a drive motor, a drive shaft, a piston, a cylinder, a valve plate, a suction valve, and a suction valve stopper, and the suction valve stopper composed of an elastic member may be disposed between the suction valve and the cylinder to support a reed valve portion of the suction valve to limit an opening degree of the reed valve portion. Therefore, the opening degree of the suction valve can be sufficiently ensured, so that not only can the cooling force in a high-load operation region be improved, but also dead volume can be prevented in advance, and then the energy efficiency in a low-load operation region and / or a high-load operation region can be improved.

According to the high-damping anti-drawing three-dimensional seismic mitigation and isolation support, the long-term load borne by the metal rubber composite spring is reduced, and the service life of the metal rubber composite spring is prolonged. The vertical seismic mitigation and isolation assembly and the horizontal seismic mitigation and isolation assembly are connected and fixed. The metal-rubber composite spring is arranged between the vertical seismic mitigation and isolation top plate and the vertical seismic mitigation and isolation bottom plate, the upper end of the metal-rubber composite spring is fixed with the vertical seismic mitigation and isolation top plate, and the lower end of the metal-rubber composite spring is fixed with the vertical seismic mitigation and isolation bottom plate; the upper supporting seat is fixed on the vertical seismic mitigation and isolation top plate, and the lower supporting seat is fixed on the vertical seismic mitigation and isolation bottom plate; the shear fork lifting mechanism is movably arranged between the upper supporting base and the lower supporting base, the upper bearing base is slidably connected to the lower portion of the upper supporting base, and the lower bearing base is slidably connected to the upper portion of the lower supporting base. The upper end of the scissor fork is connected with the upper bearing seat, and the lower end is connected with the lower bearing seat; the elastic supporting mechanism is connected with the shear fork and elastically supports the shear fork.

The invention provides a low-load combustion optimization control system for a unit, and the system comprises a sensing network module which collects key parameters of the unit in a combustion process; the data preprocessing module is used for preprocessing the collected key parameters; the index analysis module is used for analyzing the energy balance deviation degree, chemical balance and combustion uniformity evaluation indexes of the current unit based on the preprocessed key parameters; the control strategy execution module is used for carrying out threshold value judgment on the result of each index and correspondingly executing preset energy balance, chemical balance and combustion uniformity strategies; the feedback regulation module is used for acquiring the executed feedback signal and performing new index analysis and cyclic regulation to form a closed-loop feedback mechanism; energy balance, chemical balance and combustion uniformity in the combustion process are analyzed and controlled, so that combustion stability and combustion efficiency are improved, pollutant emission is reduced, the service life of equipment is prolonged, and meanwhile, the adaptability of a unit to a power grid is enhanced.

The invention relates to an energy efficiency optimization method for a dynamic load of a central air conditioner, which comprises the following steps of: establishing a response relationship among a cold and heat source, a transmission and distribution system and end equipment, identifying a nonlinear decoupling characteristic of a cold and heat response behavior by monitoring operation deflection of each level of equipment under a low-load working condition, and defining and updating a cooling capacity response deviation threshold in real time; on the basis of the cooling capacity response deviation threshold, delay compression control is conducted on response actions of the refrigerant side and the air medium side, and by adjusting the air side response time sequence in advance, dynamic thermodynamic equilibrium is formed between refrigerant transfer delay and air medium response in advance; by establishing the response relationship among the cold and heat source, the transmission and distribution system and the end equipment and introducing a cold capacity response deviation threshold dynamic updating mechanism, nonlinear coupling mismatch in a cold and heat transmission chain can be accurately identified, so that the system is more flexible to operate under low-load and variable-load conditions, frequent start and stop or redundant operation of the cold and heat source is avoided, and the system reliability is improved. And therefore, the overall COP value of the system is remarkably increased, and unit cooling capacity consumption is reduced.

The invention discloses a high-precision transformer fault detection method and system, relates to the technical field of transformer detection, is used for solving the problems of insensitive fault characterization and delayed diagnosis under a light load condition, and judges whether to enter a load judgment mechanism or not by acquiring input side access voltage information and counting low-load accumulated duration. When entering a load discrimination mechanism, detecting the start-stop behavior of a load branch and the temperature rise trend of a winding, calculating a light load index, identifying a light load state, carrying out region division on an iron core, collecting magnetic flux density data, and calculating iron loss balance characteristics aiming at iron loss deviation which is easy to occur under a light load condition; the insulation degradation coefficient is calculated by fusing the oil temperature peak value and the dielectric loss factor, and the abnormal index is generated with the iron loss balance characteristic, so that the early warning of the early hidden fault of the transformer can be realized in a light load scene in which the traditional temperature rise and current indexes are insensitive, and the operation reliability and maintenance efficiency of the transformer in a power distribution system are improved.

The invention relates to a method and system for preventing frequent start and stop of a compressor in a low-load scene, and belongs to the technical field of automobile control, and the method comprises the following steps: when a preset triggering condition is met, controlling a battery loop EXV and a battery water pump as follows: calculating a difference value between a target evaporation temperature and an actual evaporation temperature of the compressor in real time; setting a first temperature threshold value and a second temperature threshold value, wherein the first temperature threshold value is greater than the second temperature threshold value; when the difference value is larger than or equal to the first temperature threshold value, a battery loop EXV and a battery water pump are controlled according to a first preset strategy; and when the difference value is smaller than or equal to the second temperature threshold value, the battery loop EXV and the battery water pump are controlled according to a second preset strategy. By controlling the battery loop EXV and the battery water pump to operate, redundant cooling capacity is indirectly guided into the battery pack cooling loop, the cooling capacity is transmitted to the battery pack body through the cooling loop, and the situation that a compressor is started and stopped frequently is avoided.

The invention provides a TTT-based switching method and device, a communication system and a storage medium. The method can be applied to the technical field of wireless communication. In the scheme, the terminal equipment can obtain the moving speed measured by the L1 layer and the adjacent region load and the business service quality requirement measured by the L3 layer, and reports the data to the source base station, so that the source base station can dynamically adjust the TTT according to the data, and the network adaptability is improved. For example, in a high-speed moving scene, the switching delay is reduced by shortening the TTT; when the load is low, the TTT is prolonged, so that the signaling overhead can be reduced, and resource waste caused by static configuration is avoided. Besides, the terminal equipment can predict future resource requirements based on historical data and trigger the target base station to perform dynamic resource pre-allocation on the terminal equipment in advance, so that the reserved resource access cell is directly used, the traditional random access process is skipped, the negotiation time during switching is reduced, and seamless switching is realized.

The invention discloses an electric vehicle coordinated charging control method and system based on charging demand grading, and the method comprises the steps: S01, detecting whether there is an electric vehicle connected to a charging pile or not in real time, and collecting the connection state parameters of the electric vehicle; s02, the type of the charging pile is judged, if the charging pile is a household charging pile, a corresponding charging power demand index value is calculated, and if the charging pile is a public charging pile, an occupation duration penalty coefficient is calculated; s03, determining the upper limit value of the public charging power according to the occupation duration penalty coefficient of the electric vehicle at the historical moment; and step S04, setting an objective function and constraint conditions by minimizing the peak-valley difference of the total load of the micro-grid and maximizing the load smoothness, solving to obtain charging power control parameters of all the currently accessed electric vehicles, and constructing and forming an ordered charging model. According to different charging requirements of users, the user charging behavior can be dynamically optimized, the load peak-valley difference is reduced, and the power grid operation stability is improved.

The invention discloses a control method of a multi-split air conditioner based on load self-adaption and an air conditioning unit, and relates to the technical field of air conditioner control. The technical problems that when the multi-split air conditioner operates at small load at night, due to the fact that the output capacity is not matched with the required load, the control mode is passive, and self-adaptive adjustment is insufficient, a unit is started and stopped frequently, room temperature fluctuates, and a user feels uncomfortable are solved. Each indoor unit is independently controlled, a load self-adaptive matching algorithm is adopted, room loads are calculated through real-time monitoring, matched output capacity loads are generated according to real-time load changes in respective rooms, and independent control logic is generated; the outdoor unit calculates the supply capacity according to the parameter change of each indoor unit, realizes load self-adaptive adjustment based on the combined control of the compressor frequency and the fan rotating speed, and automatically optimizes and iterates the room load through the real-time matching and automatic optimization of the output capacity of the outdoor unit and the room load on the premise of not increasing hardware. And real-time supply and demand matching of loads in each room is realized.

The present application relates to a pressure-operating machine and a conversion method that can be converted between the Additive and American installation modes, belonging to the technical field of pressure-operating machines, including a pressure-operating machine, the pressure-operating machine includes a bracket assembly, a lifting part, a slip device, a well control part, and a hydraulic control part. The slip device includes a fixed slip group and a movable slip group. The fixed slip group includes a movable anti-top slip, a fixed anti-top slip, a fixed load-bearing slip and an active turntable. The active turntable includes a turntable and an upper seat ring, and the movable slip group is connected to the turntable; the well control part includes an annular blowout preventer and a working blowout preventer, and the annular blowout preventer is connected to the fixed load-bearing slip, including a righting column, which is used to be installed between the movable anti-top slip and the lower load-bearing plate, and the fixed anti-top slip is arranged below the lower load-bearing plate to convert from a pressure-operating machine to an American pressure-operating machine. The present application has the effect of reducing the investment cost of oil production equipment.

The invention relates to the technical field of design and manufacturing of automatic carrying mechanical devices for heavy-load parts on automobile production lines, in particular to an automatic carrying device for heavy-load parts on automobile production lines, which is used for automatically grabbing and transporting large-mass parts on the automobile production lines. Comprising a carrying mechanism and a control mechanism, and the carrying mechanism comprises a carrying machine translation track, a carrying machine lifting air cylinder, a carrying machine body, a rotating device, a clamping jaw telescopic track and a carrying machine clamping jaw; the upper end part of the transporter lifting cylinder is mounted on a rack of the production line, and a running track is arranged on the rack of the production line; the control mechanism is composed of a controller and a hydraulic pipe connecting base. The controller is mounted on the equipment mounting frame; a cable on the controller is connected with the hydraulic pipeline and hydraulic-electric pipeline connecting seat; according to the transporter clamping jaw structure designed by the device, grabbing and transporting of a full-automatic automobile chassis structure are achieved, the defects that in the current automobile manufacturing process, when heavy objects are hoisted by manpower at high frequency, the efficiency is low, and the load is high are overcome, and the production efficiency and the automation degree are greatly improved.

The utility model relates to the technical field of steam turbines, and discloses a thermodynamic system of a coupling back pressure turbine for wide-load peak regulation, which is provided with a boiler, a back pressure turbine, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a generator and a recovery mechanism, the boiler is respectively connected with the back pressure machine, the high-pressure cylinder and the intermediate-pressure cylinder; the back pressure machine is connected with the high-pressure cylinder; the medium-pressure cylinder is connected with the low-pressure cylinder; the low-pressure cylinder is connected with the generator; the recycling mechanism is connected with the low-pressure cylinder and the boiler and used for condensing steam discharged by the low-pressure cylinder and recycling and conveying the steam to the boiler. In a high-load operation state, the thermodynamic system, the back pressure turbine and the high-pressure cylinder operate in parallel, and the boiler conveys steam to the back pressure turbine and the high-pressure cylinder. In the thermodynamic system in a low-load operation state, the back pressure machine and the high-pressure cylinder are connected in series for operation, the boiler conveys steam to the back pressure machine, and the back pressure machine conveys steam to the high-pressure cylinder. According to the utility model, the pressure of steam entering the steam turbine during low-load operation can be improved, and the feed water temperature and the operation economy can be improved.

The invention relates to the technical field of industrial automation, and discloses a multi-mode switching control method for a variable displacement piston pump driven by a servo motor, which comprises the following steps of: acquiring multi-dimensional operation state parameters and load power of a variable displacement piston pump system; performing dynamic mode decomposition on the load power signal, and executing preset state switching compensation mapping to complete mode switching on the basis of the extracted mode characteristics and the current state parameter under the condition of judging that the switching condition is satisfied; executing a corresponding control strategy in the new mode, and dynamically adjusting the pump displacement and the rotating speed of the servo motor through feedback control; and detecting the response and energy efficiency performance of the regulation and control system according to the performance index in the system operation process. By adopting a dynamic mode intelligent switching mechanism, the system can automatically match the optimal operation mode in different working environments, the energy utilization efficiency is greatly improved, and the effects of effectively reducing energy waste and reducing the total energy consumption of the system during stable load or low load operation are achieved.

A structural components node (9) a crash box connector (14) and a crash extender connector (13) each having a top plate extending in a substantially horizontal plane and allowing to secure directly together the crash extender (7) and the crash box (8). Advantageously, the structural components node (9) can further optionally include connections with a hanger (10) and a front transverse member (11). It is possible to reduce the amount of welding operations needed to assemble the structural components node (9) and to provide a robust structural components node (9) ensuring a high structural strength to the assembly and an efficient cooperation between the lower and middle load paths and between the left and right side of the vehicle in case of a front impact. A process of assembling such a structural components node (9) is also provided.

The utility model relates to the technical field of anti-loosening bolts, in particular to an anti-loosening bolt for a wind driven generator, which comprises a bolt and a nut, the bolt comprises a head and a screw rod, the nut is in threaded connection with the surface of the screw rod, a sliding groove is arranged on the surface of the screw rod, and a circular ring base plate is sleeved on the surface of the screw rod. And a limiting block is fixedly connected to the inner arc surface of the circular ring base plate, the limiting block is clamped in the sliding groove, an inserting groove is formed in the surface of the circular ring base plate, and a locking mechanism is fixedly connected to the surface of the nut. The bolt and the nut can be fixed through matching of the circular ring base plate and the locking mechanism on the nut, so that connection between the bolt and the nut is firmer, the problem of bolt loosening caused by various complex working conditions such as vibration, high and low load changes and strong wind impact in the operation process of the wind driven generator can be effectively solved, and the service life of the wind driven generator is prolonged. The reliability of bolt connection is greatly improved, and stable connection of all parts of the wind driven generator is ensured.

The invention provides a self-adaptive control method and device for a supercharging system of a natural gas engine, and belongs to the field of engines. The rotating speed, the air inlet flow, first information and the required torque gradient of the natural gas engine are obtained, whether the natural gas engine is in the low-load working condition or not is judged based on the rotating speed and the air inlet flow, and the first information comprises the accelerator opening degree change rate, the rotating speed change rate, the supercharging pressure and the load change slope; when the natural gas engine is in the low-load working condition, determining whether the current working condition is a steady-state working condition or a transient working condition according to the first information; and under the condition that the current working condition is the steady-state working condition, the opening degree of the deflation valve is controlled to be in a full-open state, under the condition that the current working condition is the transient working condition, the transient working condition is divided into multiple transient grades according to the accelerator opening degree change rate and the required torque gradient, and the opening degree of the deflation valve is controlled according to the transient grades. According to the scheme, the problem that the economical efficiency and the dynamic property of the natural gas engine under low load are difficult to balance is solved.

The automobile part torsional fatigue test bench comprises a bench body, a driving mechanism is arranged at one end of the top surface of the bench body, a workpiece carrying structure is arranged at the other end of the top surface of the bench body, a force application structure is arranged at the position, close to the driving mechanism, of the top surface of the bench body, and the driving mechanism comprises a driving bin. The end, away from the force application structure, of the driving bin is fixedly connected with a servo motor, and the two sides of the middle of the interior of the driving bin are fixedly provided with a cycloidal-pin wheel speed reduction assembly and a planetary speed reduction assembly correspondingly. The driving mechanism is driven by the servo motor, a huge oil supply hydraulic system does not need to be used, the occupied area is small, the output torsion load can be switched through the cycloidal-pin wheel speed reduction assembly or the planetary speed reduction assembly, the load output through the planetary speed reduction assembly is low, constant loads can be repeatedly applied to a workpiece for a long time, and the working efficiency is improved. The output load of the cycloidal-pin wheel speed reduction assembly is high, destructive testing of the maximum load can be carried out, and two detection modes can be considered.

The utility model belongs to the technical field of automation equipment, and discloses a material conveying connection buffering device which comprises a rack, a containing piece, a connection feeding picking mechanism and a connection discharging picking mechanism, the rack is provided with a connection feeding area and a connection discharging area, and at least two conveying tables are arranged on the rack at intervals. The two opposite conveying ends of the conveying table extend to the connection feeding area and the connection discharging area correspondingly. The multiple containing pieces are arranged, and each conveying table can support the multiple containing pieces and convey the containing pieces from the connection feeding area to the connection discharging area. The connection feeding picking mechanism is movably arranged on one side of the connection feeding area and can pick up products and place the products into the containing pieces located in the connection feeding area. The connection discharging picking mechanism is movably arranged on one side of the connection discharging area and can take out products placed in the containing pieces located in the connection discharging area. According to the material conveying, connecting and buffering device, automatic operation of buffering feeding and discharging and connecting conveying can be achieved, and manpower consumption is reduced.

The invention discloses an intelligent static blade angle adjusting method and system for a steam turbine under the low-load working condition, and the method comprises the steps that real-time operation data of the steam turbine under the low-load working condition are obtained, and the real-time operation data comprise a flow parameter, a pressure parameter and a temperature parameter; and according to the real-time operation data, the aerodynamic characteristic change trend under the current working condition is calculated, and the optimal value of the theoretical stationary blade angle is determined. And comparing the deviation between the theoretical optimal value and the actual static blade angle value, and judging whether adjustment is needed or not. And if the deviation exceeds a preset threshold value, a stationary blade angle adjusting mechanism is started, and an adjusting instruction is generated. And the adjusting instruction is input into an executing mechanism, and the target angle of the static blade angle value is adjusted. Therefore, the method can intelligently adapt to aerodynamic characteristic changes under the low-load working condition, accurate adjustment of the static blade angle is achieved, and the operation efficiency and stability of the steam turbine under the low-load condition are effectively improved.

The invention discloses a self-adaptive load adjusting method and system for a heat pipe air conditioner, and the method comprises the steps: collecting the working state data of the air conditioner through a sensor, and enabling the working state data to at least comprise temperature data, pressure data, working medium circulation flow data and load power data; performing data preprocessing on the working state data and then performing fusion to obtain initial working state data; calculating a real-time load coefficient based on the initial working state data, and dividing a low-load working condition, a medium-load working condition and a high-load working condition according to the real-time load coefficient; and according to different working conditions, the working medium flow and the fan speed are dynamically adjusted through a fuzzy PID algorithm and a self-learning mechanism. And the operation key parameters of the heat pipe are covered by multiple types of sensors, so that one-sidedness of single temperature control is avoided.

The invention provides a charging load demand response method based on a virtual power plant technology. The charging load demand response method comprises the steps of generating a virtual load node corresponding to a to-be-regulated charging load and an initial response curve sequence in a preset response scheduling layer through a virtual power plant coordination system; and performing time sequence rearrangement on the initial response curve sequence according to a time axis, executing a coupling operation through a topological coupling engine, and outputting a coupling result. And verifying whether the coupling result is adaptive to a preset response time condition, generating a first to-be-optimized response curve by adopting a node replacement strategy when the coupling result is adaptive, and constructing a second to-be-optimized response curve when the coupling result is not adaptive. And executing optimization operation according to the processing mode adaptive to the to-be-optimized response curve, generating a target response curve, and replacing the to-be-regulated charging load with the target response curve to realize optimized regulation of the charging load. The method can improve the operation stability of the power grid, reduce the load response delay, optimize the space-time distribution of the charging load, and improve the adaptability and adjustment efficiency of the power grid to the large-scale charging load.

The invention provides a power load ordered recovery priority evaluation method and system for reducing a load rebound effect, and the method comprises the steps: carrying out the real-time monitoring of a power grid, collecting power load parameters and state parameters, and carrying out the calculation to obtain load recovery priority parameters; a dynamic punishment mechanism is introduced, power load violation behaviors are detected, and a punishment term is determined in combination with the power grid load rate and a new energy fluctuation dynamic regulation factor; dynamically distributing an optimization weight according to the current operation scene type of the power grid; constructing a power load recovery priority model according to the load recovery priority parameters in combination with the optimization weight sum and the penalty term; a power load recovery priority estimation value is obtained through the power load recovery priority model, and the priority of orderly recovery of the power load is measured; scientific and objective quantification of power load recovery priority and recovery sequence can be realized, sharp load increase can be inhibited from the source, and safe and stable recovery of a power grid can be guaranteed.

The invention discloses a bidirectional resonance type DAB control method of a wide-range and full-working-condition ZVS. According to a power interval where given power is located, the working mode of the bidirectional resonance type DAB is divided into an extremely light load mode, a medium-low load mode and a medium-high load mode, and then control of four degrees of freedom including triple phase shifting and frequency modulation is carried out. According to the invention, switching among three modes can be realized according to different given power conditions, ZVS can be realized in a full working condition range (including a forward full working condition and a reverse full working condition), and the circuit operation efficiency under heavy-load and medium-load working conditions can be improved.

A wide-load operation turboset comprises a first-class low-pressure cylinder and a second-class low-pressure cylinder, the first-class low-pressure cylinder is used for meeting the non-peak-shaving operation working condition, and the second-class low-pressure cylinder is used for meeting the peak-shaving operation working condition; the load of the peak regulation operation condition of the turboset is x% of the rated load of the turboset, the high-pressure cylinder, the medium-pressure cylinder and the second-class low-pressure cylinder jointly output power, and 5 < = xlt; a; the load of the turboset under the non-peak-shaving operation condition is y% of the rated load of the turboset, the high-pressure cylinder, the medium-pressure cylinder and the first-class low-pressure cylinder jointly output power, and y is larger than or equal to a and smaller than or equal to 110; a is a peak regulation working point from high load to low load of the turboset, and a is greater than or equal to 20 and less than or equal to 60.

The invention discloses a power supply framework, electronic equipment, a management method and device, a medium and a program product, and relates to the technical field of power supply. The power module and the super-capacitor module are electrically connected with the computing node through the bus, so that the super-capacitor module is independent of the power module and the computing node, the defect that a capacitor is added at the computing node end to occupy space is overcome, and fault isolation between the computing node and the super-capacitor module can be achieved. The output current of the power supply module is polled, the operation mode is determined, and then the working state of each part is dynamically adjusted, so that the super capacitor module discharges to bear the dynamic current and reduce the pressure of the power supply module when the calculation node is in high load, charges to store energy when the calculation node is in low load, and current fluctuation can be regulated and controlled from the source without modifying power distribution infrastructure. The technical problems that a capacitor lacks fault isolation and dynamic current impacts a power grid in the prior art are solved, and the technical effects of stably distributing the bus current, weakening the power grid impact, isolating and optimally utilizing the calculation node space are achieved.

The invention provides a roller punching composite incremental forming method and equipment, and the method comprises the following steps: S1, adjusting the shapes of an upper die block and a lower die block according to the shape of a plate; s2, a forming section comprises a feeding area, a forming area and a demolding area which are sequentially arranged, the plate is placed on a lower mold, and the plate is conveyed to the forming area from the feeding area to be subjected to incremental forming; s3, after the plate is formed in the forming area, the plate is conveyed to a demolding area to be demolded; and S4, the upper and lower die blocks are driven by a power gear to return to the initial feeding point. Incremental forming of a plate in the length direction is achieved through mutual movement of the upper die and the lower die, and the upper die is structurally composed of discrete die blocks arranged in sequence and is driven by a chain gear mechanism to do curve rotary motion; the lower die structure is a whole, linear reciprocating motion is achieved through a gear and a rack, low-load incremental forming of high-strength plates can be achieved, forming and demolding of the core-pulling die can be achieved, and the core-pulling die can be applied to forming of high-strength semi-closed section parts.

According to the control method of the air conditioning system, the controller and the air conditioning system, under the condition of low load demand, the air conditioning system avoids an extreme strategy of complete shutdown or high-load operation in a traditional method through judgment of active load demand data, total environment temperature data and historical target temperature data are further obtained, and the control method of the air conditioning system is provided. And calculating a passive load demand, and executing a first control strategy of low-power-consumption mode operation, so that the temperature of the room or the region corresponding to the sub-controller gradually approaches the historical target temperature. According to the method, energy consumption and equipment abrasion are reduced, and meanwhile, the response efficiency and the user experience of the air conditioning system in the low-load period are remarkably improved by optimizing the water temperature and the system operation state.

The invention discloses a sectional type variable stiffness mattress spring and a preparation method thereof and a mattress, the spring is formed by winding a wire rod with an I-shaped section, the spring body is sequentially divided into a top contact area, a middle support area and a bottom transition area along the axial direction, and the pitches and the sectional dimensions of the three areas are sequentially increased, so that the spring presents a low elastic coefficient of 0.15-0.25 N / mm under a low load of 50-200N, and the spring body has a high elasticity coefficient of 0.15-0.25 N / mm under the low load of 50-200N. And under the high load of 450 to 750N, the high elastic coefficient of 0.4 to 0.5 N / mm is shown. According to the invention, through unique material cross section, segmented variable parameter structural design and composite heat treatment and surface coating processes, excellent fitting flexibility of the mattress under low load and strong supporting performance under high load are synergistically realized, and the problem that the traditional mattress collapses when being soft and is rigid when being supported is effectively solved; and meanwhile, the advantages of high bending resistance, good durability, silence and the like are achieved.