49results about How to "Exit in time" patented technology

The invention discloses a frostless refrigerator capable of defrosting through coupling of ultrasonic waves and super-hydrophobic materials, and a control method of the frostless refrigerator. The frostless refrigerator comprises a master controller, an evaporation chamber, a refrigerating chamber, a cold storage chamber, a compressor, a drainage device, an environmental temperature sensor and a magnetic sensitive control air valve, wherein the master controller is separately connected with a ultrasonic wave oscillation system, the compressor, an electric heater, the magnetic sensitive control air valve, a fan, the environmental temperature sensor, a refrigerating chamber temperature sensor, an evaporator temperature sensor and a cold storage chamber temperature sensor, and the ultrasonic wave oscillation system and the electric heater are defrosting devices; the surface of an evaporator, the surface of a refrigerating chamber air channel, the surface of a refrigerating chamber air-return vent, the surface of a cold storage chamber air channel, and the surface of a cold storage chamber air-return channel are made from super-hydrophobic materials. According to the frostless refrigerator and the control method thereof disclosed by the invention, frosting surfaces are treated by using the super-hydrophobic materials, ultrasonic waves and electric heating are coupled, on-line defrosting is performed in a manner that the frostless refrigerator does not stop, the stable running environment of the refrigerator is guaranteed, and the service life of the refrigerator is prolonged.

The invention discloses a primary frequency modulation method of a doubly-fed wind-driven generator set based on variable power point tracking and supercapacitor energy storage coordinated control inthe technical field of new energy so as to enable the wind-driven generator to perform maximum power point tracking without disturbance or a system load increase and maximize the power generation benefit. When the load is reduced, the primary frequency adjustment control is started, the additional power is superimposed onto the output power under the maximum power tracking according to the frequency deviation and the virtual inertia control to obtain the final reference power to achieve the frequency adjustment. In order to realize the spare capacity supply required by primary frequency modulation, the supercapacitor is connected through a bidirectional DC/DC converter to the DC-side bus capacitor of the doubly-fed wind-driven generator set. A grid-side converter has a function of maintaining the stability of the DC bus capacitor voltage. The discharge power of the supercapacitor energy storage device flows directly to the load side through the grid-side converter.

The present invention disclose a seeding mechanism with adjustable sowing amount, which is characterized in that, including hole-type tube arranged with multi-strip in circumferential direction, adjusting ring with multi-cord in the circumferential direction, seed protecting ring arranged on inner wall of close type hole, seeds storager and driving mechanism; the multi-strip of the hole-type tube corresponding to the multi-cord of the adjusting ring and matching in size, and a seeds filling cavity is formed between terminal of the cord and terminal of the groove; the adjusting ring is movable along axial direction for adjusting size of the seeds filling cavity; the driving mechanism is connected with the hole-type tube; the seeds storager is closely mounted to the external wall of the hole-type tube. The apparatus is a sowing device with adjustable sowing amount, capable of implementing accurate sowing of granule seeds such as cole etc, and also implementing accurate sowing of large granulated seeds.

The invention discloses a ternary-cycle air cooled refrigerator. An electrical control device internally stores parameters such as a refrigerating fan operating target time parameter LCFSJ. The defrosting method comprises a freezing chamber defrosting method, a refrigerating chamber defrosting method and a variable temperature chamber defrosting method. The freezing chamber defrosting method comprises a defrosting entering preparing step, a defrosting preparing step, a defrosting entering step, a defrosting step and a defrosting existing step. According to the ternary-cycle air-cooled refrigerator and the defrosting method thereof, considering specific working conditions in the operation process of the refrigerator, accurate matching of the defrosting control and the actual working conditions is realized, the defrosting effect is ensured, the condition that defrosting is carried out when defrosting is not needed is avoided, frequent defrosting is avoided, excessive starting of a defrosting electrical heater is avoided, so that energy is saved, and a phenomenon that defrosting cannot exit is prevented.

The digital phonetic broadcast method and system based on computer system platform is used to broadcast files stored in the computer system phonetically. By means of defining limited keyboard keys, the present invention makes it possible for the blind to read the files in the computer system via simple key operation. In the present invention, the blind may select broadcast target and regulate broadcast position at will via keyboard commands. No mouse is used.

The invention provides a reactive compensation cabinet and a control method for reactive compensation units of the reactive compensation cabinet. The control method comprises the following steps: starting the reactive compensation cabinet; each reactive compensation unit being in information interaction with other reactive compensation units, and a control unit of each reactive compensation unit comparing information of itself with the received information of the other reactive compensation units; judging the priority of each reactive compensation unit based on the information; if the priority of the ith reactive compensation unit is larger than the priority of the other reactive compensation units, taking the ith reactive compensation unit as a master machine and the control unit of the ith reactive compensation unit as a master control unit, and taking the other reactive compensation units as slave machines and the control units of the other reactive compensation units as slave control units; and the master control unit controlling the master machine and all the slave machines to be in reactive power operation so as to realize reactive compensation of the reactive compensation cabinet. The master control unit does not need to be configured separately, and only one master machine runs every moment; and the reactive compensation of the reactive compensation cabinet is realized.

The invention discloses a self-tapping skull hollow drill. The self-tapping skull hollow drill comprises a sleeve; the upper part of the sleeve has a length-adjustable pressing rod, the lower part ofthe sleeve has a drilling rod, and a handle and the hand rocking bar are arranged on both sides of the sleeve respectively; one end of the hand rocking bar can achieve mechanical driving with the drilling rod in the sleeve; a tail end of the drill rod is engaged with a drilling bit; the drilling bit can be freely replaced at the tail end of the drilling rod; the drilling bit is hollow inside; theinner wall of the drilling bit has a self-tapping screw, and a plurality of drilling tools are uniformly arranged at the tail end of the drilling bit; and an inner ring surface is formed on an inner wall of each drilling tool; an intermittent outer ring surface is formed on an outer wall of each drilling tool; the outer diameter of the outer ring surface is larger than the outer diameter of the drilling bit; the bottom surfaces of the drilling tools are inclined toward the center of the drilling bit, and the included angle between the bottom surfaces of the drilling tools and the outer walls of the drilling tools is 110 to 160 degrees. Compared with the prior art, the self-tapping skull hollow drill is simple in structure and reasonable in design, can complete craniotomy quickly and effectively, can reduce damage to the patient, and the skull piece can be preserved integrally, and postoperative filling is facilitated.

The invention provides a short-circuit current consuming branch switching-off control method and device based on state response. The method provided by the invention comprises steps of generating a short-circuit current consuming branch switching-off instruction when detecting that the on/off state signal of any branch connected to a busbar is in an on state at a first time and detecting that theon/off state signal of any branch is in an off state at a second time in a power system where the short-circuit current is required to be controlled in real time; and removing the short-circuit current consuming branch from the power grid in response to the short-circuit current consuming branch switching-off instruction. The method provided by the invention can timely remove the short-circuit current consuming branch from the power system after the short-circuit fault in the power system is isolated, so that the system can restore to the normal state as soon as possible.

The invention discloses a novel survey device for planning and design. The novel survey device comprises a bottom plate, wherein a rotary disc is arranged at the top of the bottom plate; a thread rodis rotatably connected into the rotary disc; a sliding sleeve is arranged on the outer surface of the thread rod; the thread rod is in thread connection with the sliding sleeve; and a first bevel gearis fixedly connected with the top of the sliding sleeve. According to the novel survey device disclosed by the invention, in a survey operation process, a drill bit is clamped into a gap of a hard substance; when the drill bit stops rotating, an operator reversely rotates a rotary wheel in time to drive a second bevel gear to rotate; the second bevel gear is engaged with the first bevel gear to rotate; the first bevel gear drives the sliding sleeve to move upward along the thread rod, so that a bracket, a motor and the drill bit are driven to retreat in time; and a thread sleeve is rotated toadjust the distance between a first thread bracket and a second thread bracket, so that the bottom plate can be at a balanced state.

The invention discloses a fluorine deficiency control method for a reheating mode of a reheating and dehumidification multi-split air conditioner system. The system comprises an outdoor unit and a plurality of indoor units; each indoor unit comprises an indoor unit first heat exchanger, an indoor unit second heat exchanger, a first expansion valve and a second expansion valve, wherein the first expansion valve is connected onto a pipeline of the indoor unit first heat exchanger, and the second expansion valve is connected onto a pipeline of the indoor unit second heat exchanger; the control method comprises a fluorine deficiency judging step: detecting a first difference value between a superheat degree of a first heat exchanger of a started indoor unit and a target superheat degree, and a second difference value between temperature of an outlet pipe of a gas-liquid separator of the outdoor unit and a refrigerant saturation temperature value corresponding to a pressure value of a low-pressure side, and judging whether the system is deficient in fluorine or not according to a result of the first difference value and the second difference value. According to the fluorine deficiency control method for the reheating mode, disclosed by the invention, the reheating and dehumidification multi-split air conditioner system is enabled to judge whether the fluorine is deficient or not accurately, therefore a foundation is laid for timely quit of a fluorine-deficiency state.

The invention provides a method for estimating successive difference evolution of a medium quality factor. The method comprises the steps of 1, preprocessing an actual VSP channel set to remove non-consistency of different wavelets; 2, creating an initial group X containing M units; 3, dividing an underground medium into different stratums according to the distance of two adjacent wave detectors, treating each channel as a sub-component, and defining local adaption function of the k unit through L1 norm so as to obtain the local adaption value of each channel; 4, optimizing and updating each sub-component in the initial group X according to the actual VSP channel and the local adaption of each channel; solving the quality factor and speed to be estimated after variation according to the variation strategy; 5, repeating step 4, updating the whole group, and selecting the optimal unit according to the global adaption value so as to obtain the quality factor and speed of underground medium. The method is fast to calculate, high in convergence, and free of dependence on the initial value.

The invention discloses a three-jaw type follower rest special for turning large-pitch threaded rods, and belongs to the field of mechanical machining equipment. The three-jaw type follower rest comprises a semi-arc follower rest body 1, a sliding base driving lead screw 2, a sliding follower rest base 3, a supporting jaw telescopic driving rod 4, axial adjustable supporting jaws 6 and a trapezoidal bearing roller 13. The axial adjustable supporting jaws are arranged in the arc radial direction of the follower rest body, the trapezoidal bearing roller 13 is installed at the centripetal end ofthe follower rest body, in addition, the trapezoidal bearing roller can be adjusted in the axial direction of a workpiece and is of a trapezoidal structure, the axial adjustable supporting jaws can betelescopic in the radial direction, and the semi-arc follower rest body can slide along the sliding follower rest base. According to the three-jaw type follower rest, the machining precision of the large-pitch trapezoidal threaded rods is improved, operation is convenient during use, safety and stability are achieved, and the three-jaw type follower rest is suitable for machining of the large-pitch threaded rods different in diameter and pitch.

The invention discloses a station entering and exiting control system and method and belongs to the technical field of automatic logistics design. The system comprises a main rail, a branch rail provided with a workstation, a station entering device, a station exiting device and a blocking device arranged on the workstation, a station entering interpretation sensor arranged on the main rail, a carrier interpretation sensor, a magnetic sensor and a control host, wherein the carrier interpretation sensor and the magnetic sensor are arranged on the main rail and located between the station entering device and the station exiting device. The control host controls a carrier to enter the station according to a station entering signal, otherwise, the carrier does not enter the station; a metal sheet is arranged at a push rod; if the carrier interpretation sensor does not interpret the carrier information and the magnetic sensor detects the metal sheet, the control host controls the blocking device to act, and the carrier to be taken out of the station is allowed to enter the main rail from the station exiting device; and if the carrier interpretation sensor interprets the carrier information and the magnetic sensor detects the metal sheet, the control host controls the blocking device not to act. The method is realized based on the system. The situation that one push rod drives a plurality of carriers to move is avoided, and the carriers are prevented from colliding with one another at the departure position.

The objective of the invention is to provide a group management method and device. Compared with the prior art, the group management method provided by the invention comprises the following steps: adding a user to a target group according to a group joining request of joining the target group of the user, starting to calculate the current group dwell time length of the user in the target group, detecting whether the current group dwell time length is equal to or greater than a group retention time length, if so, displaying group retention selection information of the target group to the user, and if the user selects to retain the target group, retaining the user in the target group. According to the group management method provided by the invention, when the current group dwell time length of the user in the target group is greater than or equal to the group retention time length, the user is prompted to select to retain the target group or not, therefore it is convenient for the user to join interested groups and log out uninterested groups in time, and thus the user experience is improved.

The invention discloses a method and a system for reducing tailing after the end of downloading. The method comprises the following steps: after a thread completes current transmission, sampling data volumes of all transmissions of the thread to obtain the average data volume of data transmitted by the single thread each time; accumulating data volumes of transmitted data of all the threads to obtain the total data volume of the transmitted data; taking the difference between the total data volume of data to be transmitted and the total data volume of the transmitted data to obtain the data volume of the remaining data to be transmitted; according to the data volume of the remaining data to be transmitted, the average data volume of data transmitted by the single thread each time, and the current number of the threads, determining whether to end the thread. Through the method and the system, the downloading data volume is more accurate, does not surpass an appointed data volume too much, and conforms a user expectation; for the appointed downloading data volume, the downloading time is shortened and the tailing time is reduced.

The invention relates to a power tool. The power tool comprises a housing, an output shaft, a storage clamp having accommodation bins, an operation part capable of driving working heads to enter or retreat from the accommodation bin and a detection part movably connected to the housing. An obliquely-pressing part capable of driving the detection part to move is arranged between the detection part and the housing. One end of the detection part is provided with a blocking part and the other end of the detection part is provided with a judgment part located between the output shaft and the storage clamp in an axial direction. The operation part drives the working heads to enter the accommodation bins. When the lengths of the working heads are more than the pre-set length, the judgment part abuts against the working heads such that the detection part is kept at the first position. The blocking part is used for restricting the operation part to move away from the direction of the output shaft. The working heads are prevented from being jammed when the working heads can timely retreat by an operator. When the lengths of the working heads are smaller than or equal to the pre-set length, the judgment part is separated from the working heads such that the detection part moves to the second position under effect of the obliquely-pressing part. The blocking part allows the operation part to move away from the direction of the output shaft.

The invention provides a short-circuit current sinking branch switch-out control method and device based on overcurrent protection. The short-circuit current sinking branch switch-out control method based on overcurrent protection provided by the invention comprises steps of: generating a short-circuit current sinking branch switch-out instruction according to a first current in a short-circuit current sinking branch acquired at the first time, and/or a second current in the short-circuit current sinking branch acquired at the second time; switching the short-circuit current sinking branch outof a grid in response to the short-circuit current sinking branch switch-out instruction, wherein the short-circuit current sinking branch is a shunting branch connected in parallel with a busbar, and is controllably switched into or out of the grid. The method provided by the invention can timely switch the short-circuit current sinking branch out of a power system after the short-circuit faultin the power system is isolated, in order to restore the system to a normal state as soon as possible.