54 results about "Charge recovery" patented technology

The invention relates to an electric charge recovery dynamic risk assessment method and system based on dual-channel ensemble learning and dynamic PID regulation and control. The prediction method comprises the following steps: selecting power data of a certain number of enterprises for analysis, and screening Top-15 high contribution features; the XGBoost and the LightGBM are fused by adopting a Stacking integration method, and the arrearage probability of the user is predicted; proposing a tail risk capture mechanism of quantile random forest regression, and predicting the arrearage amount of the arrearage user based on the arrearage probability output by the classification model; and a two-channel joint framework of a classification model and a regression model is constructed, and two-dimensional early warning of arrearage probability prediction and arrearage amount quantitative analysis is realized. A dynamic risk scoring mechanism is constructed according to the arrearage probability of classification prediction and the large-amount arrearage risk of regression quantification, upgrading from a single index to a comprehensive score is completed, a dynamic risk regulation and control mechanism based on PID is provided, and intelligent grading and dynamic early warning of arrearage users are achieved.

To provide a method of eliminating charges in a potential control layer when recovering charges simpler and easier than a new charge carrier that can carry high charges at a low potential in an electrostatic generator.SOLUTION: An eliminated charge holder with the same type and without a potential control layer is provided behind a charge carrier 7 in a traveling direction, and is charged by a charging source 8 with a polarity different from and with an equal amount as charges present in a potential control layer 73 of the charge carrier, and the charges are added to the potential control layer 73 to make a charge amount in the potential control layer 73 zero. Thereby, the charges carried in a state in which a potential of the charge carrier 7 is enhanced can be safely recovered in a simple method.SELECTED DRAWING: Figure 3

Disclosed in the present application are a method and apparatus for regulating the power of an offshore wind farm energy storage system on the basis of the state of charge. The method in the present application comprises: acquiring a power grid frequency and the state of charge of an offshore wind farm energy storage system, and on the basis of the power grid frequency and the state of charge, acquiring a power grid frequency deviation and a state-of-charge recovery demand, respectively; determining whether the power grid frequency deviation is within a preset power grid frequency dead band, if the power grid frequency deviation is within the power grid frequency dead band, in view of the power grid frequency deviation and the state-of-charge recovery demand, acquiring an inertia power regulation and control amount of the energy storage system by means of a fuzzy control algorithm combined with a preset adaptive inertia frequency control model, otherwise, in view of the power grid frequency deviation and the state-of-charge recovery demand, acquiring the inertia power regulation and control amount by means of the adaptive inertia frequency control model; and on the basis of the inertia power regulation and control amount, regulating and controlling the inertia power of the offshore wind farm energy storage system. By means of the present application, the level of refinement and accuracy of a regulation and control process for an energy storage system can be improved.

The invention relates to the technical field of wiring terminal boxes, in particular to an intelligent analysis type wiring terminal box and a control system thereof.The intelligent analysis type wiring terminal box comprises the intelligent analysis type wiring terminal box and the control system used for controlling the wiring terminal box, and the intelligent analysis type wiring terminal box comprises a box body and a transparent protective cover; the box body is composed of a first main body, a second main body and a third main body which are sequentially connected, the first main body is provided with a wiring communication assembly, the second main body is an insulation board, and the third main body is provided with a monitoring acquisition assembly; the control system comprises a sampling unit, a comparison unit, a processing unit, a communication unit, an acquisition terminal and an acquisition background, and all the units cooperate to realize data sampling, comparison, processing and transmission. According to the invention, the accuracy of the metering device can be guaranteed, and the working pressure of line loss index governance improvement and electric quantity and electricity charge recovery by basic units can be reduced, so that the purpose of intelligent monitoring of the metering device is achieved.

A charge recycling circuit in an integrated circuit DC-DC converter having two power MOSFETs, the charge recycling circuit comprising a single inductor and recycling MOSFET switches arranged and sized such that when one of the two power MOSFETs is turning off, its gate capacitance charges are transferred to the single inductor, stored in the single inductor and then transferred directly to the gate of the other power MOSFET to turn it on.

The invention discloses automobile part brazing leakage testing equipment, which is applied to the technical field of brazing leakage testing equipment, and is characterized in that the automobile part brazing leakage testing equipment comprises a testing seat; a clamping assembly used for synchronously clamping a plurality of to-be-tested parts is movably connected to the testing base based on the feeding and discharging conveying assembly, and a lower sealing base and an upper sealing base are fixedly connected to the testing station of the testing base in the vertical direction based on the guide pressing assembly. The lower sealing seat and the upper sealing seat form a sealing test cavity, the lower sealing seat is uniformly and fixedly connected with a plurality of sealing positioning assemblies, the upper sealing seat is fixedly provided with an inflation recovery assembly, and the sealing positioning assemblies are internally and fixedly connected with vacuum suction pipes and helium detection assemblies used for detecting helium; the method has the technical effects that the test efficiency is improved, and the test cost is reduced.

The invention provides a power-off recovery control method for a charging station, and relates to the technical field of charging pile control, the method is applied to a control end, and comprises the steps: obtaining a unique identifier corresponding to each charging pile in the charging station, and determining the identity of the charging pile as the control end based on the unique identifier; responding to power restoration of the charging station, and receiving a power-off restoration application; establishing a recovery charging queue based on the receiving sequence of the power-off recovery application; and based on the recovery charging queue, successively sending a recovery charging instruction so as to respectively instruct the control end or each controlled end to carry out charging recovery. According to the method and the device, the charging piles can perform charging recovery according to the recovery charging queue sequence, so that the problems of power grid tripping, even damage to power grid equipment or the charging piles and the like caused by overlarge instantaneous load due to simultaneous charging recovery when power supply is just recovered (at the moment, the voltage is insufficient and the power supply is not stable) in all the charging piles with charging interruption in the station are avoided.

The invention discloses an optical thin film rim charge recovery device which is characterized in that rim charges are monitored in real time through an annular laser sensor when the optical thin film rim charge recovery device is used, and when the rim charges cannot be detected, namely after a clamping assembly is started through an electric control box to automatically clamp the rim charges, the rim charges are pulled to a feeding port through a lifting assembly; rapid response and automatic recovery during rim charge breakage are achieved, manual intervention requirements are reduced, meanwhile, when a single side breaks down, due to the fact that a butt joint block and a driving block are detachably connected, an assembly plate and a guide block are detachably connected through an electromagnet and an adsorption disc, the electromagnet is controlled through an electric control box according to requirements, and when a feeding port on one side breaks down, the feeding port on the other side breaks down, the assembly plate and the guide block are not damaged. And offcut is temporarily transferred to the feeding port on the other side for collection, so that continuous and stable operation of the production line is guaranteed.

Stimulator circuitry useable in a stimulator device is disclosed. The circuitry includes biasing circuitry that can be used to generate a voltage to allow any one or more electrode on the device (including the case electrode and lead-based electrodes) to provide a common mode voltage (Vcm) to the tissue. Providing a stable Vcm to the tissue is particularly useful when sensing neural responses to the stimulation that the device provides. Switches are provided to couple each of the electrode nodes to one or more buses. This allows any of the electrodes to be selected to provide bipolar or monopolar stimulation, or to act to provide Vcm to the tissue during relevant pulses phases, including during passive charge recovery.

A system may include a neurostimulator and a programmer. The neurostimulator may have a plurality of electrodes, and may be configured to deliver neurostimulation by delivering neurostimulation pulses of a first polarity to a neural target using at least one stimulation electrode from the plurality of electrodes and passively recovering charge using a first number of one or more passive electrodes from the plurality of electrodes. The programmer may have a user interface configured to receive a user input for changing a number of passive electrodes used to passively recover charge from the first number to a second number. The programmer may be configured to control the neurostimulator to passively recover charge using the second number of passive electrodes. Some examples may include fractionalization to control the contribution of each passive electrode used to recover charge. A variable impedance may be used to control a relative charge recovery current.

According to the intelligent film laminating machine control method and system provided by the invention, the defect phase coordinates are established through film edge period marks, the elongation is estimated and the defect backtracking time delay is corrected in combination with the difference of upstream and downstream odometer rollers, and accurate attribution of defects in a process section is realized. According to the system, an online micro-stripping module is arranged in a rim charge recovery channel, a stripping mean value P, a fluctuation coefficient CV and stripping work W are obtained in real time, an adhesion allowable domain Omega is constructed, and an adhesion margin S is calculated; and solving a parameter adjustment increment delta u by adopting tangential constraint under omega constraint, performing safe self-adaptive adjustment on actuators in a temperature zone, pressing pressure, linear speed and the like, and avoiding transboundary failure through continuous verification and a step-down backspacing mechanism. According to the scheme, the first piece passing rate and stability are improved, the defect rate of bubbles, wrinkles, delamination and the like is reduced, batch tracing and controlled updating are supported, and the method is suitable for a roll-to-roll film laminating production line.

The invention relates to the technical field of battery protection, and discloses a battery protection control circuit and a mobile power supply, the battery protection control circuit comprises a redundancy protection circuit; the first end of the redundancy protection circuit is electrically connected with the first end of the main protection circuit and the negative electrode of the battery pack; the battery pack is composed of a battery cell group comprising a plurality of battery cells; the second end of the redundancy protection circuit is electrically connected with the positive electrode of the battery cell group; the third end of the redundancy protection circuit is electrically connected with a middle sampling point of the battery cell group; the fourth end of the redundancy protection circuit is electrically connected with a voltage reference point; the fifth end of the redundancy protection circuit is grounded; when it is detected that the charging voltage of any battery cell is larger than the charging protection voltage, charging operation is stopped through the redundancy protection circuit; when it is detected that the battery pack meets the preset charging recovery condition, the charging operation is recovered. Therefore, by implementing the method, a recoverable, low-energy-loss, accurate and efficient protection function can be realized under the condition of overcharge test or protection loop failure.

The present application relates to the technical field of on-chip interconnection, and particularly relates to a voltage adjusting method and system applied to on-chip charge recovery interconnection lines, which comprises the following steps: calculating a first data activity difference caused by data in a current period when the data is transmitted on upper and lower channels of the interconnection line based on charge recovery; accumulating a second data activity difference caused by data in past several periods when the data is transmitted on the upper and lower channels of the interconnection line on the basis of the first data activity difference to obtain a total data activity difference; when the total data activity difference exceeds a first threshold, performing voltage compensation on an intermediate voltage of the upper and lower channels to stabilize the intermediate voltage, and the voltage compensation is performed simultaneously with charging and discharging of the intermediate voltage. By predicting the intermediate voltage fluctuation of the upper and lower channels of the interconnection line, and then performing early intervention and compensation before the intermediate voltage appears large deviation, the problem of voltage compensation lag in the traditional charge recovery interconnection line design is solved.

The application provides a kind of optical storage system energy storage device state of charge management method, it is related to optical storage system control technical field, solve the optical storage system with initiative support ability and through energy storage device control direct current bus voltage, energy storage device overcharge / overdischarge leads to state of charge out of limit, simple cut off energy storage easy to cause system instability problem.The technical scheme is: set energy storage state of charge safety range and hierarchical limit threshold, build upper and lower limit management strategy.Lower limit side according to state of charge dynamic adjustment active droop coefficient, when out of limit, utilize photovoltaic power small power charging recovery;Upper limit side cut off energy storage, switch photovoltaic control target to maintain direct current bus voltage stability, balance photovoltaic and net side power, guarantee energy storage safety and system stability.

The invention discloses a novel BMS (Battery Management System) test method, which comprises the following steps that 200 groups of data packets are preset, each group of data packets comprises 200 pieces of 16-bit data, and the data comprises a DEC value of the number of guard plate strings; a quiescent current maximum value DEC value; the HEX value is selected as the test action, the Bit 0 to the Bit 6 are calibration 0, static 1, overcharge protection 2, over-discharge protection 3, overcurrent protection 4, charge recovery test 5 and discharge recovery test 6 in sequence, and the Bit 7 to the Bit 15 are reserved; statically testing a platform voltage DEC value; testing the voltage DEC value of the platform through overcharging; and over-discharging the voltage DEC value of the test platform. The invention belongs to the field of novel BMS test methods, and particularly relates to a novel BMS test method. The problems of low efficiency, complicated operation and poor flexibility are solved by presetting a large number of data packets and performing test action selection and parameter setting in a specific coding mode.

The invention discloses a low-temperature charging protection method and system for a power bank, and the method comprises the steps: collecting the multi-source temperature of the power bank during charging, calculating a temperature deviation value according to the multi-source temperature, and judging a low-temperature attribute according to the temperature deviation value; determining a grading protection mechanism based on the low-temperature attribute, determining a protection mode through the grading protection mechanism, and carrying out low-temperature charging protection on the power bank according to the protection mode; continuously detecting the multi-source temperature, evaluating a charging recovery condition according to a detection result, and determining whether normal charging is recovered or not according to an evaluation result; and if yes, determining an optimal charging parameter of the power bank according to the detection result, and controlling the power bank to continue charging based on the optimal charging parameter. Different protection modes can be accurately carried out according to different low-temperature states, the practicability, reliability and objectivity are improved, meanwhile, the charging normal state can be recovered in the first time, and the charging efficiency is guaranteed.

The invention discloses an improved hybrid trapezoidal converter with an efficient output capacitor charge recovery function, belongs to the technical field of improved hybrid trapezoidal converters, reduces the power loss during light load, improves the light load efficiency, enables equipment to efficiently utilize energy in a low-power-consumption operation state, and reduces the energy consumption of the equipment. According to the invention, the circuit structure is optimized, the endurance time of the battery in a light-load scene is prolonged, the improved design realizes accurate zero-cross detection and phase-dividing control, the optimized circuit structure, especially the M4 no longer conducts IC current, the IR voltage drop is significantly reduced, the precision of zero current detection (ZCD) is ensured, a guarantee is provided for stable operation and high-efficiency energy conversion of the circuit, and the circuit structure is simple and practical. The switching of each stage is more accurate, and the overall conversion efficiency is improved; in addition, the invention further provides a method for recycling CO charges by using CF and CDC capacitors and reusing the charges under a periodic wake-up application scene, so that the energy utilization efficiency is greatly improved, and the service life of the battery is greatly prolonged.

A system may include a neurostimulator and a programmer. The neurostimulator may have a plurality of electrodes, and may be configured to deliver neurostimulation by delivering neurostimulation pulses of a first polarity to a neural target using at least one stimulation electrode from the plurality of electrodes and passively recovering charge using a first number of one or more passive electrodes from the plurality of electrodes. The programmer may have a user interface configured to receive a user input for changing a number of passive electrodes used to passively recover charge from the first number to a second number. The programmer may be configured to control the neurostimulator to passively recover charge using the second number of passive electrodes. Some examples may include fractionalization to control the contribution of each passive electrode used to recover charge. A variable impedance may be used to control a relative charge recovery current.

The utility model provides a non-woven fabric offcut recycling device which comprises a movable base, movable brake wheels, a compression box, a shielding sealing door, a supporting column, a top plate, a hydraulic cylinder, a compression plate, a smashing feeding guide box structure and an adjustable offcut conveying frame structure. The crushing box, the discharge hole, the crushing roller, the power motor, the guide plate, the conveying plate and the baffle plate are arranged in a matched manner, so that crushed offcut can fall to the upper end of the guide plate in the use process, offcut conveying work can be conveniently performed in the compression process, and the aim of compressing the offcut for multiple times is fulfilled; a guiding and conveying plate, a conveying plate, a shielding plate, an inverted-U-shaped frame, a threaded column and a rotating pipe are arranged in a matched manner, so that threaded connection of the threaded column and the rotating pipe in the leftover material recycling process is facilitated, and the height of the right end of the guiding and conveying plate and the height of the conveying plate are conveniently adjusted in the recycling process; and the purpose of conveniently adjusting according to the thickness of the compressed offcut in the compression process is achieved.

The invention relates to the technical field of risk assessment, and provides a power consumer electricity charge recovery risk assessment method, device and system and a medium. According to the implementation scheme, through a pre-trained lightweight gradient boosting decision-making tree model, aggregation features of all first power consumers are predicted, and default probability values of all the first power consumers are obtained; determining each second power user based on the default probability value and the user type of each first power user; through a pre-trained time sequence fusion model, carrying out fusion prediction on the static electricity utilization characteristics and the dynamic electricity utilization characteristics of each second power user to obtain a default probability value of each second power user; and performing risk assessment on the to-be-assessed customer based on a preset risk assessment level, the default probability value of each first power user or the default probability value of each second power user to obtain a risk assessment level of the to-be-assessed customer. According to the embodiment of the invention, accurate and efficient evaluation of the electric charge recovery risk of the power consumer is realized.

The invention discloses a charging pile sudden stop reset control method and device, a program product and a storage medium, and relates to the technical field of charging control. By acquiring the working parameters in the time windows before and after the sudden stop signal and extracting the coupling incidence relation and the abnormal parameter characteristics among the working parameters, the fault root cause causing sudden stop and the risk level of the fault root cause can be accurately identified; a corresponding charging reset strategy is generated based on the identified risk level and the fault root cause, and potential safety hazards possibly brought by adopting a unified reset process are avoided; meanwhile, in the reset execution process, reset response parameters are collected in real time and safety verification is carried out, so that the reliability of the reset process is ensured; and finally, a corresponding charging recovery strategy is determined according to a safety verification result, differential processing of different sudden stop conditions is realized, and the safety of a charging pile resetting process is improved.

This application provides a charge recovery circuit, method, and display device. The circuit includes: a driving module; a parasitic capacitance module electrically connected to the driving module; an energy storage module electrically connected to the driving module; and a low-voltage circuit module electrically connected to the energy storage module. The driving module is configured to output charge to the parasitic capacitance module and control the connection between the parasitic capacitance module and the energy storage module. The parasitic capacitance module is configured to receive the charge output by the driving module. In response to the driving module activating the electrical connection between the parasitic capacitance module and the energy storage module, the driving module outputs charge to the energy storage module. The energy storage module is configured to store the charge output by the parasitic capacitance module and supply power to the low-voltage circuit module. Therefore, the circuit of this application realizes the recovery and utilization of residual charge.

The utility model discloses a bidirectional hydrodynamic cavitation explosive taking device suitable for a long projectile body, which belongs to the technical field of scrapped ammunition treatment and comprises a lifting mechanism for supporting the long projectile body, a cavitation water tank and a spray rod assembly are respectively arranged at two ends of the long projectile body, and the spray rod assembly sprays high-pressure water to an explosive column in the long projectile body entering the cavitation water tank; a collecting box is arranged on the side face of the cavitation water tank to complete charging recovery. The long bomb body is lifted to the position with the same height as the spray rod assemblies on the two sides through the lifting mechanism, the two ends of the long bomb body are inserted into the cavitation water tanks on the two sides correspondingly, the cavitation water tanks provide a water submerging environment for the long bomb body, the spray rod assemblies spray high-pressure water into the long bomb body in the cavitation water tanks, cavitation jet flow serves as a core, and through a low-pressure double-end explosive drawing-out mode, the long bomb body can be drawn out. Separation of the shell and the charged powder is completed, and the shell is convenient to recycle. The two-way explosive drawing-out device can conduct two-way explosive drawing out on the long projectile body, safe and efficient explosive drawing out, shell recycling and explosive charging of the long projectile body with the medium-large caliber are achieved, and resource waste is reduced.

The problem of a potentially high amount of supra-threshold charge passing through the patient's tissue at the end of an Implantable Pulse Generator (IPG) program is addressed by circuitry that periodically dissipates only small amount of the charge stored on capacitances (e.g., DC-blocking capacitors) during a pulsed post-program recovery period. This occurs by periodically activating control signals to turn on passive recovery switches to form a series of discharge pulses each dissipating a sub-threshold amount of charge. Such periodic pulsed dissipation may extend the duration of post-program recovery, but is not likely to be noticeable by the patient when the programming in the IPG changes from a first to a second program. Periodic pulsed dissipation of charge may also be used during a program, such as between stimulation pulses.

The invention discloses a user electricity fee recovery risk assessment method and device, electronic equipment and a storage medium, and belongs to the field of risk early warning management. Calculating a first period self-break variable value corresponding to the historical electricity consumption of the user and a second period self-break variable value of the historical electricity consumption load of the user; according to the historical payment condition data, calculating a periodic state quantity value and historical credibility of historical payment of the user; and according to the first period self-break variable value, the second period self-break variable value, the period state variable value and the historical credibility, evaluating the user electric charge recovery risk to obtain a user electric charge recovery risk state corresponding to the user, and then performing corresponding electric charge recovery risk early warning according to the user electric charge recovery risk state. According to the invention, the problem that user electricity charge recovery risk assessment cannot be realized in the prior art can be solved.

The utility model relates to a rim charge recovery device and system, the rim charge recovery device comprises a cache unit, a guide unit, a chamber unit, a support unit and a pressing unit, the cache unit is arranged on a horizontal plane, is communicated with a rim charge transportation device, and is used for obtaining and caching rim charges conveyed by the rim charge transportation device; the guide unit is arranged at the bottom end of the interior of the cache unit, is connected with the cache unit and is used for guiding the offcut to be discharged from the interior of the cache unit; the cavity unit is arranged below the buffering unit, communicates with the guiding unit and is used for storing part of the offcut; the supporting unit is arranged at the end part of the cavity unit and is connected with the cavity unit; the pressing unit is arranged on the supporting unit and connected with the cavity unit in a sliding mode. The leftover material pressing device has the advantages that leftover materials can be pressed through cooperative use of the cavity unit and the pressing unit, the leftover materials are prevented from entering the feeding port in an excessively loose state, and the risk of blocking the feeding port is reduced.

This invention belongs to the field of semiconductor technology and relates to a thin-barrier GaNHEMT device with reverse blocking capability. The drain of the device in this invention is divided into two parts: one part is an ohmic contact structure for forward current conduction, and the other part is a MIS structure to achieve reverse blocking and reduce reverse leakage current. This invention uses a 3-6nm thin AlGaN barrier layer, avoiding the etching damage caused by etching the AlGaN barrier layer to achieve zero bias voltage depletion in conventional barriers. Simultaneously, a charge recovery layer is introduced to restore the channel 2DEG density in the thin barrier structure, giving the device better current capability. The thin-barrier GaNHEMT device with reverse blocking capability proposed in this invention has advantages such as simple fabrication, low reverse leakage current, and high withstand voltage.

The invention provides an aerocar power system, a control method thereof and an aerocar, the aerocar power system is provided with a composite power supply system, the composite power supply system provides electric energy for an engine and a first motor, the aerocar can be driven to run on a road, and the aerocar can be driven to fly in the air; the hybrid power supply system comprises a power battery, a super capacitor and a first relay, and when the first relay is connected, the hybrid power supply system supplies or receives electric energy together by the power battery and the super capacitor, so that compared with a single power battery, the hybrid power supply system can provide higher discharge power and charge recovery power, and the power supply efficiency is improved. Therefore, stronger dynamic property is provided, and economical efficiency is guaranteed. Thus, based on the aerocar power system, the safety and environmental adaptability of the aerocar flying in the air can be improved, and meanwhile the dynamic property of the aerocar is improved.

The application provides a charge pump parasitic capacitance charge recovery circuit, a first switch group comprises phi 11, phi 12, phi 13, phi 14, a second switch group comprises phi 21, phi 22, phi 23, phi 24, a first unit circuit comprises a first capacitor Cfly1, the first capacitor Cfly1 is provided with C1P node and C1N node, C1P node is connected to input voltage VDD through phi 11 switch and is connected to output voltage VSP through phi 21 switch, C1N node is connected to ground through phi 13 switch and is connected to input voltage VDD through phi 23 switch, a second unit circuit comprises a second capacitor Cfly2, the second capacitor Cfly2 is provided with C2P node and C2N node, C2P node is connected to input voltage VDD through phi 22 switch and is connected to output voltage VSP through phi 12 switch, C2N node is connected to ground through phi 24 switch and is connected to input voltage VDD through phi 14 switch, and C1P node and C2P node are connected through phi 3 switch.The application has simple structure, is convenient to use and has extremely high value.

The utility model relates to the technical field of carton production, in particular to rim charge recovery equipment for carton production, which is provided with a scrap recovery mechanism with air exhaust and flow guide functions, and is matched with a paper scrap crushing mechanism, so that the size of a recovery terminal can be set to be larger, the replacement operation frequency is reduced, and the practicability is improved; comprising a fixed base, a supporting frame, a guide hopper, a paper scrap crusher, a guide pipe, a barrel cover, an outer barrel, an air outlet pipe, an air extracting pump, a first hinge and a collecting net barrel, the outer portion of the front side of the top end of the fixed base is connected with the bottom end of the supporting frame, the inner side of the top end of the supporting frame is connected with the outer side of the guide hopper, the top end of the guide hopper is communicated with the bottom end of the paper scrap crusher, and the lower portion of the guide hopper is communicated with the interior of the barrel cover through the guide pipe; the left middle side of the top end of the outer barrel is movably connected with the left middle side of the barrel cover through a first hinge, the collecting net barrel is detachably arranged in the outer barrel, the output end of the outer barrel is communicated with the inner side of the air outlet pipe, and the air pump is arranged on the air outlet pipe and fixed to the middle of the top end of the fixed base.