31 results about "Oscillatory waves" patented technology

The invention discloses an offshore wind power typical fault transient waveform rapid simulation method and system, and relates to the technical field of offshore wind power unit grid connection and power grid fault simulation, and the method comprises the steps: obtaining an original typical fault voltage transient waveform at an offshore wind power unit grid connection point; a wavelet analysis method is adopted to carry out filtering processing on the fault voltage transient waveform, decomposition is carried out to obtain an approximate signal and a detail signal, a fundamental wave and a main oscillation waveform in the detail signal are extracted, an RLC second-order fault simulation circuit is established, waveform superposition is carried out to form a reconstructed waveform, a reconstructed waveform analytic expression is obtained, and fault transient characteristic parameters needing to be solved are determined; preliminarily fitting the initial values of the characteristic parameters, and iteratively solving the final values of the characteristic parameters by adopting a nonlinear least square method; fitting and solving equivalent line parameter values in combination with a fault feature expression; and substituting the waveform into a fault simulation circuit, and carrying out analog simulation to generate a reproduction waveform. According to the method, the typical fault transient waveform of offshore wind power can be rapidly and accurately reproduced.

The invention discloses a cable partial discharge analysis method and device based on oscillatory waves. The method comprises the steps that the oscillatory waves are applied to a tested cable, and low-frequency envelopes and high-frequency pulses are synchronously collected; performing structure normalization according to cable parameters; encoding the environment and working condition data into a condition vector to implement condition normalization; carrying out domain self-adaptive alignment with an ideal template clustered according to a model, a length and a joint / terminal type, and obtaining a difference feature; constructing a PRPD joint fingerprint, and counting a pulse phase, an amplitude, an envelope attenuation rate and / or an equivalent Q; outputting defect positions, types and confidence intervals based on the difference features and the joint fingerprints; and adaptively determining multi-gear upper pressure and advanced shutdown according to the information gain, and generating maintenance priority and retest interval suggestions. Through step-by-step normalization processing, domain adaptive alignment and fusion of PRPD combined fingerprint features, diagnosis stability and reproducibility are enhanced, weak discharge and early defect detection capability are enhanced, and complex working conditions and cross-trigger adaptability are enhanced.

The utility model provides a cable oscillatory wave partial discharge three-in-one detection device, which comprises a first base, a second base, a shockwave main device, a detection mechanism and a compensation capacitor, the left side of the top end of the first base is fixedly connected with a controller, and the middle of the top end of the first base is fixedly connected with the shockwave main device. The front end of the shockwave main device is fixedly connected with a control mainboard, the right side of the top end of the first base is fixedly connected with a compensation capacitor, the right side of the first base is fixedly connected with a second base, the top end of the second base is fixedly connected with a detection mechanism, and the shockwave main device, the compensation capacitor and the detection mechanism are integrated on the first base and the second base. The three-in-one detection device is formed, multiple functions are integrated, operation and carrying are convenient, the occupied space of equipment is reduced, a first sliding rail, a second sliding rail, a matched T-shaped plate, a connecting plate and other parts are arranged in the detection mechanism, the positions of a connector and an extrusion plate can be flexibly adjusted, the detection device adapts to detection of cables of different specifications, and the universality of the device is improved.

The application relates to a kind of pneumatic buffering and energy recycling mechanism and its control method, it includes wave energy conversion device, oscillating buoy, pneumatic cylinder, gas interaction device, gas storage tank and for control system, wave energy conversion device is arranged on offshore platform, the upper end of oscillating buoy is fixedly connected with the lower end of wave energy conversion device, the upper end of wave energy conversion device is connected with pneumatic cylinder, gas interaction device is arranged between pneumatic cylinder and gas storage tank, gas interaction device is communicated with pneumatic cylinder and gas storage tank.The application in actual use, oscillating buoy oscillates up and down under the action of wave, wave energy conversion device converts the mechanical energy of oscillating buoy into electric energy;Control gas interaction device adjusts airflow direction, when wave is too large, gas storage tank and pneumatic cylinder provide force in the opposite direction of oscillating buoy movement, realize the function of buffering, when small wave, give oscillating buoy the same force in the direction of movement, improve power generation efficiency, help to solve the problem of unstable energy recovery efficiency.

An ultrasonic transducer configured to selectively operate at a first resonant frequency or a second resonant frequency during a wire bonding operation, comprising: an elongated transducer body having an aperture thereon for mounting a piezoelectric driver stack to drive the ultrasonic transducer to operate at the first or second resonant frequency; and a mounting flange connected to the transducer body at a first nodal vibration region of the transducer body when the ultrasonic transducer is operating at the first resonant frequency. The length of the elongated transducer body is substantially equal to two wavelengths of a first oscillatory wave transmitted along the length of the transducer body when the transducer is operating at the first resonant frequency, and substantially equal to one-half wavelength of a second oscillatory wave transmitted along the length of the transducer body when the transducer is operating at the second resonant frequency.

An isolation chip assembly includes an isolation chip (10), first oscillators (20), and second oscillators (30). The isolation chip (10) includes a sample reservoir (13), a first filtration membrane (14) and a second filtration membrane (16) at opposite sides of the sample reservoir (13). The first oscillators (20) are mounted on the first filtration membrane (14) and the second filtration membrane (16), and can generate a first oscillation wave when operating. The second oscillators (30) are mounted on outer surfaces of the first chamber (15) and the second chamber (17), and can generate a second oscillation wave when operating. A frequency of the first oscillation wave is greater than a frequency of the second oscillation wave, and an amplitude of the first oscillation wave is less than an amplitude of the second oscillation wave.

The application discloses a kind of offshore wind power typical fault transient waveform fast simulation method and system, it is related to offshore wind turbine grid connection and power grid fault simulation technical field, including: obtaining the original typical fault voltage transient waveform at offshore wind turbine grid connection point;Wavelet analysis method is used to the fault voltage transient waveform is filtered and handled, and approximate signal and detail signal are obtained by decomposition, fundamental wave and main oscillation waveform in detail signal are extracted, RLC second-order fault simulation circuit is established, and reconstruction waveform is formed by waveform superposition, reconstruction waveform analytical expression is obtained, the fault transient characteristic parameter required to be solved is determined;The initial value of characteristic parameter is initially fitted, and the final value of characteristic parameter is iteratively solved using nonlinear least square method;Equivalent line parameter value is solved by fitting using fault characteristic expression;It is substituted into fault simulation circuit, and recurrence waveform is generated by simulation simulation.The application can quickly and accurately reproduce offshore wind power typical fault transient waveform.

The invention provides a mechanical transmission system of a vertical oscillation wave energy power generation device, which is characterized in that a wave energy acquisition and conversion device is mounted at the offshore bottom, and is used for capturing wave energy through vertical movement of a floater, transmitting the wave energy through a mechanical mechanism in the device and converting the movement of the floater into rotary movement of the mechanical mechanism; periodic speed fluctuation of the mechanical mechanism is adjusted through the flywheel speed adjusting mechanism, mechanical energy is converted into electric energy through the generator, and wave energy with smooth power is collected and utilized. According to the device, a mechanical electric energy conversion mode is adopted, oil pollution is avoided, the underwater part is of a totally-closed structure, and green, efficient and reliable renewable energy utilization is achieved.

The present application relates to a kind of GIS disconnecting switch mechanical state on-line evaluation method based on VFTC, comprising: obtaining the VFTC full process waveform generated in the process of switching on and off of GIS disconnecting switch when no fault, VFTC full process waveform is composed of multiple single breakdown oscillation waveform;The expectation and variance of the peak value of each single breakdown oscillation waveform when no fault are calculated based on Gaussian process regression model;The upper and lower threshold of the peak value of each single breakdown oscillation waveform is set based on the value of expectation and variance, the proportion of the number of the peak value of each single breakdown oscillation waveform of the equipment to be diagnosed in the corresponding upper and lower threshold range is counted, whether the equipment to be diagnosed produces fault is evaluated based on the proportion;It can realize the on-line monitoring of GIS disconnecting switch mechanical state without power, without periodic power-off disassembly calibration, save a lot of manpower and material resources, while various potential mechanical faults can be found in time, avoid its further development deterioration, guarantee the stable operation of GIS disconnecting switch and power system.

The application provides a system and method for estimating central arterial blood pressure by fusing cuff oscillatory waveform features, wherein the system comprises a signal acquisition module, an oscillatory wave amplification module, an oscillatory wave waveform feature analysis module, a pressure wave transit time calculation module, a central arterial blood pressure calculation module and a report output module. The system and method for estimating central arterial blood pressure by fusing cuff oscillatory waveform features can improve the individualized estimation accuracy of central arterial blood pressure by analyzing the waveform features of the cuff oscillatory wave and fusing the waveform features into the estimation of the pressure wave transit time.

The present application relates to a PSS parameter optimization method and device for a CPR1000 nuclear power unit, comprising: S1, establishing a PSS parameter adjustment model corresponding to an excitation system in the CPR1000 nuclear power unit, and establishing a waveform playback device according to the PSS parameter adjustment model, wherein the PSS parameter adjustment model is used to adjust the PSS parameter, and the waveform playback device is used to receive the PSS parameter and generate a corresponding waveform; S2, monitoring the working waveform of the excitation system to obtain measured oscillation waveform data when the excitation system oscillates; S3, inputting the measured oscillation waveform data to the waveform playback device, and adjusting the corresponding PSS parameter according to a preset rule through the PSS parameter adjustment model, so as to obtain a plurality of first waveforms corresponding to the waveform playback device; S4, obtaining the corresponding PSS parameter corresponding to the shaft torsional vibration suppression of the excitation system as the target PSS parameter according to the plurality of first waveforms. The present application can quickly obtain the PSS optimization parameter, and effectively reduce the response of the excitation regulator to the shaft torsional vibration.

The utility model discloses a cable oscillation wave testing arrangement relates to cable testing device field, including base, the base bottom near the place of four corners all is connected with universal wheel, the bottom of base inner chamber center is equipped with round hole, and the inner chamber of round hole is equipped with the connecting barrel, connecting barrel side wall near the bottom all with the inner wall of round hole is connected, the inner chamber top of connecting barrel is equipped with organism, the top center of organism is equipped with the connecting mouth. The utility model discloses through pressing the two clamping bars of both sides into the inside of adjacent plug -in disc, also through two connecting rods, the two clamping bars of both sides are rotated to tend to vertical position, thereby can remove the restriction to two plug -in disc, so that can conveniently complete the disassembly operation to damaged lifting ring, so that the effect of convenient disassembly and assembly lifting ring is reached, thereby the staff can conveniently dismount damaged lifting ring from organism and replace it, and further facilitate actual use.

This application discloses a parameter acquisition method for an oscillation waveform detection system, relating to the field of power system control technology. By accurately acquiring parameters such as the equivalent inductance, capacitance, resistance, and minimum test voltage of the transformer winding under test, as well as the maximum and minimum oscillation frequencies of the oscillation waveform detection system, the lower limit of the input impedance of the waveform acquisition module, the upper limit of the range, the upper limit of the output voltage amplitude of the DC power supply, and the maximum allowable output current, the method obtains the equivalent total capacitance of the oscillation waveform detection system, the series capacitance of the upper and lower arms of the voltage divider, the first capacitance of the waveform adjustment capacitor, the second and third capacitances of the upper and lower arms of the voltage divider, and the resistance of the current-limiting resistor. This avoids uncertainties arising from empirical design, ensures the stable and controllable quality of the generated oscillation waveform, and guarantees consistent and reliable detection results on transformers of different capacities and voltage levels.

This invention discloses a method for diagnosing axial displacement and radial deformation faults in transformer windings, belonging to the field of transformer fault diagnosis technology. The method involves building a controllable fault simulation platform, using wedge blocks, radial extrusion plates, and a local hot air device to accurately simulate axial displacement and radial deformation faults of different degrees and locations. After acquiring winding oscillation wave signals, the signals undergo boundary-weighted local preprocessing and point-by-point adaptive angle mapping to generate optimized two-dimensional feature images. GLCM texture and grayscale statistical multi-dimensional features are extracted and standardized. Combined with feature weighted fusion and a lightweight CNN, two types of faults are identified, and quantitative indicators are used to assess four levels of severity: normal, minor, moderate, and severe.

The application discloses a water area landslide induced surge type judgment and wave height prediction method, which comprises the following steps: a dynamic model of slope body instability is established, the speed u(t) and the displacement s(t) process of the landslide body are obtained, the dimensionless parameters Fr and S are calculated, the surge wave type is distinguished, and the wave height A of the corresponding wave type is calculated by calling the oscillation wave / single wave formula. z The application has very important engineering application value. m Through the classification and discrimination of the landslide surge wave, the wave height prediction method is proposed for different surge waves, reliable technical support is provided for the determination of relevant disaster prevention and mitigation measures and the formulation of emergency plans, and the application has very important engineering application value.

The application provides a stove control method and device, electronic equipment and storage medium. In a preset standby state, an oscillation wave recognition module installed on the stove is used to receive an oscillation wave signal. If the oscillation wave signal meets state change conditions, a state change instruction is determined, and the working parameters of the preset working mode of the stove are updated according to the state change instruction, so that the stove works in a new self-defined working mode. The technical problem that the stove control in the prior art cannot flexibly and conveniently control the stove, and cannot solve the problem that dirt such as oil stains and water stains hinders the control of the stove, is solved. The technical effect that the oscillation wave signal is used to flexibly control the switch of different working modes of the stove, modify the working mode or self-define the working mode, and avoid the influence of oil stains and water stains on the sensitivity and accuracy of the control of the stove is achieved, and the hands of the user are freed, so that the user will not be in a hurry to control the stove.

The application provides a blood pressure measurement system and method based on oscillatory wave feature extraction and supervised fusion, and relates to the technical field of wearable medical health monitoring. First, an oscillatory wave database is constructed, the oscillatory wave database comprising oscillatory wave signals and corresponding blood pressure measurement values, then the original oscillatory wave signals of a sample to be identified are obtained, and according to sensor adhesion and lead connection detection indicators, usable oscillatory wave signals and unusable oscillatory wave signals are distinguished, and the usable oscillatory wave signals are quality evaluated; the oscillatory wave signals of good quality are preprocessed, time domain, frequency domain and time-frequency features of the preprocessed oscillatory wave signals are extracted respectively, and multi-index features of the oscillatory wave signals are obtained; finally, the time domain, frequency domain and time-frequency features of the obtained oscillatory wave signals are standardized and supervised feature fusion is performed, feature weighted fusion is performed, and then non-invasive blood pressure measurement is realized.

This invention discloses a method, apparatus, device, and storage medium for detecting transformer winding deformation, belonging to the field of power equipment testing technology. The method includes: acquiring the oscillation wave signal of any phase winding of the transformer; setting several initial sliding windows and recursively updating the noise baseline of the oscillation wave signal of the initial sliding windows; extracting intermediate oscillation waves; setting several final sliding windows and calculating the variance indication of the intermediate oscillation waves of the corresponding final sliding windows based on the variance baseline of the intermediate oscillation waves; extracting the final oscillation wave; extracting the effective oscillation waves of the remaining phase windings according to the time series index corresponding to the final oscillation wave; calculating the correlation coefficient and dominant frequency between the effective oscillation waves of each phase winding, and detecting the transformer winding deformation respectively. This invention solves the technical problems of the existing fixed time window method, which cannot cover the effective segments of different windings, has large noise interference, and is easily misjudged due to waveform misalignment interference.

The utility model discloses a front end clamping conveying device for cable oscillation wave detection, which comprises a support and a connecting plate, a lifting mechanism is arranged in the support, a fixing mechanism is arranged on the lower side of the connecting plate, a stepping motor is connected in the support, the output end of the stepping motor is fixedly connected with a rotating shaft, and the output end of the rotating shaft is fixedly connected with a clamping mechanism. The rotating shaft is rotationally connected to the inner side of the support, and the outer side of the rotating shaft is fixedly connected with a detection conveying line frame. Compared with the prior art, the front-end clamping and conveying device for cable oscillatory wave detection has the advantages that stable clamping and flexible conveying of cables of different specifications are achieved through innovative design of the lifting mechanism, the fixing mechanism and other parts, the applicability and the automation degree of the device are improved, and the production efficiency is improved. Therefore, the efficiency and accuracy of cable oscillation wave detection are improved.

The application discloses a bipolar direct-current high-voltage oscillation wave generating device for power cable insulation test, relates to the technical field of power equipment insulation state detection and its technical application, and comprises an alternating current inversion unit, a polarity-adjustable direct-current generating unit, a polarity-adjustable high-voltage switch unit, a reactor unit, a measuring unit, a total control unit and an operation host computer. The application can generate oscillation wave voltage under positive and negative polarity alternation charging with adjustable levels, eliminates the risk of damage to cable insulation state caused by space charge accumulation in traditional single-polarity oscillation wave test, and has important engineering practical value.

The application discloses a microseismic event first arrival picking method and system based on dynamic time warping in the field of geophysical exploration technology, which is used for picking the first arrival of the seismic phase of a microseismic event according to a waveform to be processed, and comprises the following steps: step one, detecting the waveform to be processed and carrying out denoising processing; step two, time difference calibration of the waveform to be processed; step three, superposition processing of the waveform to be processed; step four, first arrival picking of the waveform to be processed; step five, relative to-time comparison; step six, verification of the position of a detector; and step seven, calculation parameter adjustment. The application can effectively improve the accuracy of the first arrival picking of the seismic phase of microseismic, reference oscillation waves are emitted by oscillation generators at multiple fixed positions, the position of the detector is verified based on an arrival time difference positioning algorithm, the waveform to be processed is superposed after time difference calibration, and the first arrival is picked up from the superposition channel of the waveform to be processed by a long-short time energy ratio method, so that the influence of information error between individual channels is reduced, and the reliability of the microseismic phase identification and the first arrival picking is improved.

The application discloses an AC sampling system resisting damping oscillation wave interference, and belongs to the technical field of data sampling of a relay protection device.The system comprises sequentially connected collecting modules, a hardware filtering module, an analog-digital conversion module and an embedded processing module; wherein the collecting modules input collected AC signals containing damping oscillation wave interference to the hardware filtering module; the hardware filtering module filters high-frequency components of the AC signals, obtains filtered signals and inputs the filtered signals to the analog-digital conversion module; the analog-digital conversion module converts the filtered signals into digital filtered signals and inputs the digital filtered signals to the embedded processing module; and the embedded processing module extracts, classifies and conditions damping oscillation wave interference of the digital filtered signals, so that the damping oscillation wave interference in the AC signals is removed, and the problem that the AC sampling system is weak in resisting oscillation wave and the oscillation wave is not completely suppressed is solved.

The invention discloses an electric field device, a device design method, a control method, a controller, a refrigerator and a storage drawer. The internal size of the storage drawer is a first size; the oscillatory wave generating device is arranged in the storage drawer, and the size of an electrode plate, used for radiating oscillatory waves, in the oscillatory wave generating device is the second size; the working voltage of the oscillation wave generating device, the first size of the storage drawer and the second size of the electrode plate meet a preset relation, so that the electric field intensity of the oscillation wave radiated by the oscillation wave generating device in the storage drawer is within a preset electric field intensity range. In the embodiment of the invention, under the condition that the storage drawer and the oscillatory wave generating device meet the corresponding relation, the space field intensity in the storage drawer can meet the requirement, and the problem that the field intensity distribution is not matched with the device size is solved.

The present invention discloses a highly integrated, high-power-supply-rejection-ratio (PSRR) voltage-controlled oscillator circuit. The circuit comprises a bias circuit unit, a ring oscillator circuit unit, and a shaping circuit unit. The bias circuit unit generates a bias voltage Vctrl_out and sufficient load capacity for the ring oscillator circuit unit based on an input control voltage Vctrl. The ring oscillator circuit unit generates an oscillation waveform of a corresponding frequency under the control of the bias voltage Vctrl_out. The shaping circuit unit converts the oscillation waveform into a square wave output. This invention has the advantages of a simpler structure, higher integration, and better performance.

The application discloses an internal oscillation wave power generation device and a wave power generation system based on a gravity balance assembly, which comprises a closed shell, a gravity balance assembly, an elastic support assembly, a PTO rotor assembly and a PTO main shaft; the gravity balance assembly, the elastic support assembly, the PTO rotor assembly and the PTO main shaft are arranged in the closed shell; the PTO rotor assembly is sleeved on the PTO main shaft; the two ends of the PTO main shaft are connected with the inner wall of the closed shell; one end of the elastic support assembly is connected with the PTO rotor assembly, and the other end is connected with the inner wall of the closed shell along the axial direction of the PTO main shaft; the gravity balance assembly is connected with the PTO rotor assembly and applies a balance force to the PTO rotor assembly along the axial direction of the PTO main shaft, and the balance force is opposite to the gravity direction of the PTO rotor assembly; when the closed shell is impacted by waves, the PTO main shaft drives the PTO rotor assembly to reciprocate along the axial direction of the PTO main shaft to generate electricity.

The invention discloses a fresh-keeping device, a fresh-keeping method, a controller and a refrigerator, and the fresh-keeping device comprises a storage device which comprises an oscillatory wave generating device, and the oscillatory wave generating device divides the storage device into a plurality of fresh-keeping spaces used for storing food materials; the controller is used for determining the working voltage of the oscillatory wave generating device according to the food material loading capacity of the first fresh-keeping space and the second fresh-keeping space; and controlling an oscillation wave generating device to radiate oscillation waves to the first fresh-keeping space and the second fresh-keeping space according to the working voltage. In the embodiment of the invention, the release intensity of the oscillatory wave can be adjusted by sensing the load capacity of the storage device.

This application discloses a method and apparatus for partial discharge analysis of cables based on oscillating waves. The method includes applying an oscillating wave to the cable under test and simultaneously acquiring low-frequency envelopes and high-frequency pulses; performing structural normalization based on cable parameters; encoding environmental and operating condition data into conditional vectors and performing conditional normalization; then performing domain adaptive alignment with ideal templates clustered by model, length, and connector / terminal type to obtain difference features; constructing a PRPD joint fingerprint, statistically analyzing pulse phase, amplitude, envelope attenuation rate, and / or equivalent Q; outputting defect location, type, and confidence interval based on difference features and the joint fingerprint; adaptively determining multi-level voltage up-voltage and early shutdown using information gain, and generating maintenance priorities and retest interval suggestions. Through stepwise normalization processing, domain adaptive alignment, and fusion of PRPD joint fingerprint features, the method enhances diagnostic stability and reproducibility, strengthens the detection capability of weak discharges and early defects, and improves adaptability to complex operating conditions and cross-triggering.

A wave park for an open or large body of water is disclosed. The wave park includes a body of water, and a track positioned in or proximate the body of water. The wave park further includes at least one foil coupled to move along the track, the at least one foil being at least partially submerged in the body of water. The at least one foil has a curvilinear cross-sectional geometry that includes a leading surface that is concave about a vertical axis to provide drag to generate a primary wave laterally in water of the body of water that contacts the leading surface of the foil, and a trailing surface that narrows from a maximum width of the foil adjacent the leading surface to a point at an end of the foil, the trailing surface to decrease the drag of the foil and to minimize oscillatory waves that trail the primary wave from the water moving past the leading surface of the foil.

The invention discloses a Southeast Asia thermal wave season forecasting method based on tropical waves and artificial intelligence, which comprises the following steps of: acquiring and preprocessing multi-source weather forecasting data and observation data, and dynamically correcting and fusing the forecasting data based on a Kalman filtering method; fourier transform and band-pass filtering methods are adopted, tropical wave signals of different scales are separated and extracted from the data, the tropical wave signals comprise Madden-Julian oscillation MJO, Kelvin waves and Rossby waves, and a data set reflecting the multi-scale characteristics of the tropical waves is constructed; establishing a conditional diffusion model integrated with a multi-scale feature fusion module, combining tropical wave features with regional meteorological elements, and performing optimization training on the model based on a historical training set; inputting weather forecast data of preset time into the trained conditional diffusion model, and generating a corresponding thermal wave risk spatial-temporal distribution forecast product; according to the method, the complex spatial-temporal characteristics of heat wave evolution can be reflected, and the uncertainty can be quantified through set prediction.

The present application relates to the technical field of electronic equipment cooling, and discloses an immersion cooling device, which comprises a case, a cooling mechanism and a bubble generating mechanism, the case is suitable for containing cooling liquid for cooling electronic equipment, the cooling liquid is suitable for cooling electronic equipment, the cooling mechanism is arranged in the case and is suitable for cooling the cooling liquid, and the bubble generating mechanism is connected with the case and is suitable for inputting bubbles into the cooling liquid, the electronic equipment is continuously cooled by the cooling liquid to avoid damage caused by high temperature of the electronic equipment, the bubble generating mechanism can input bubbles into the cooling liquid to disturb the cooling liquid, so that the cooling liquid generates oscillation waves, the oscillation waves can strengthen the cooling effect of the cooling liquid on the electronic equipment and heat exchange between the cooling liquid and the cooling mechanism, and the water pump structure is cancelled, so that a series of defects caused by the use of the water pump are avoided.