188results about How to "Energy-efficient operation" patented technology

An inductor architecture for resonant clock distribution networks is described. This architecture allows for the adjustment of the natural frequency of a resonant clock distribution network, so that it achieves energy-efficient operation at multiple clock frequencies. The proposed architecture exhibits no inductor overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.

The invention relates to an air cleaning device, in particular to the air cleaning device used in a data central apparatus room. According to the air cleaning device, a filtering method combining physical filtering and chemical filtering is adopted, and the pollutant concentration in the air is monitored by a gas sensor in real time. A central processing control unit generates a 4-20mA current signal or a 0-10V voltage signal to a controller of a draught fan according to the received pollutant concentration signal, the rotating speed of the draught fan is dynamically adjusted in real time, the central processing control unit uploads the data detected by a pollution degree detector and a temperature and humidity detector to a remote monitoring terminal through a communication interface, a temperature, humidity and corrosion level radar map is generated, the effect to the device from the pollutant is analyzed, the corrosion variation trend is tracked, the corrosion risks are grasped in advance, early corrosion warning is issued, and measures are taken in advance to remove hidden dangers. A specific filtering scheme is appointed according to the environment air to enable the air cleaning device to operate in an energy-saving and efficient mode.

The invention discloses an air purifier with an automatic working mode switching function and a purification method of the air purifier, which belong to the technical field of environmental protection. The air purifier comprises a purifier body, an automatic working mode switching device, a purifying air duct, a dust purifying component, a toxic and harmful gas purifying component, a carbon dioxide purifying component and a detection and control device, wherein the automatic working mode switching device comprises a power input component, a transmission component, a dust purifying drive component and a carbon dioxide purifying drive component. An automatic working mode switching method of the air purifier comprises the steps that a controller of the detection and control device sends a control command according to the condition and change of the current indoor air quality, the corresponding working mode is automatically selected and switched, and indoor air is subjected to dedusting, filtering, purifying, toxic and harmful gas absorption purifying treatment and carbon dioxide absorption purifying treatment respectively. The air purifier always operates at high efficiency and with low energy consumption to reach an effect of efficient and energy-saving operation.

The invention discloses a household fresh air purifying full-air-conditioning system which comprises a fresh air purifying air-conditioning unit, a circulation water route and an outdoor unit. The fresh air purifying air-conditioning unit comprises a pipe section with a fresh air inlet and a return air inlet. Fresh air fed from the fresh air inlet and return air fed from the return air inlet are mixed in a mixing section and filtered through a low-efficiency filter, and enter a surface type heat exchanger to exchange heat with freezing or cooling water for dehumidification, and air treated by the surface type heat exchanger enters a high-efficiency filter to be filtered again under the drive of an air feeder and then is fed into a room through an air feeding inlet. An outdoor unit comprises a compressor. The compressor is connected with an air cooling heat exchanger, a water cooling heat exchanger, a gas-liquid separator and the like through a four-way reversing valve. A freezing or cooling water inlet of the surface type heat exchanger is connected with a heat exchange water outlet of the water cooling heat exchanger, a freezing or cooling water outlet of the surface type heat exchanger is connected with a heat exchange water inlet of the water cooling heat exchanger, and therefore the circulation water route is formed. Indoor environment is adjusted and controlled in winter, summer and transition seasons, and a comfortable and healthy natural environment is simulated.

The invention discloses an elevator dispatching method, terminal and device for assisting a robot, and a medium. The method comprises the following steps that the time T0 for the robot to move from the current position to an elevator on the starting floor is obtained; the time Ti for multiple elevators in a building to arrive at the starting floor is calculated, and a time list T-list is formed; the Tj which is in the time list T-list and is the most approximate to the time T0 is obtained, and the elevator corresponding to the Tj is adopted as a target taken elevator; and the target taken elevator is called and moved to the starting floor, and the serial number of the target taken elevator is sent to the robot. The target elevator which is the most suitable for the robot to take is determined through the wireless communication mode and the IoT cloud computing measure, accordingly, the elevator dispatching method is optimized, the time for waiting the elevator is shortened when the robot needs to take the elevator, energy-saving efficient operation of the elevators is ensured, and moreover, the working efficiency of the robot is improved.

The invention relates to a solar suction-typed cooling and ground source heat pump coupling and combined supplying system which comprises a solar heat collector, a buried heat exchanger as well as an evaporator, a compressor and a condenser that are connected end to end, and has the following structure characteristics: the solar heat collector is serially connected with a heat-accumulating hot water tank by a first inlet and outlet pipe bank, the heat-accumulating hot water tank is serially connected with a suction-typed cooling machine set by a second inlet and outlet pipe bank, the suction-typed cooling machine set is serially connected with a cooling tower by a third inlet and outlet pipe bank, the suction-typed cooling machine set is communicated with an air conditioner inside an air conditioning room by a fourth inlet and outlet pipe bank, the buried heat exchanger is communicated with the condenser by a fifth inlet and outlet pipe bank, and the evaporator is communicated with the air conditioner inside the air conditioning room by a sixth inlet and outlet pipe bank; water pumps, reversing valves and / or electromagnetic valves are arranged between the first, the second, the third, the fourth, the fifth and the sixth inlet and outlet pipe banks or in each pipe tank.

The stimulation of waves in bars, in particular at high amplitudes, is used for the calibration of acceleration and force sensors. The invention relates to a method and a device for calibrating acceleration and force sensors by means of a Hopkinson bar for controlled influencing of the signal form the signal amplitude and the pulse duration of the signals over a large amplitude range. A reference sensor and the sensor for calibration are arranged on the Hopkinson bar. At the end of the Hopkinson bar opposite the sensors the stimulation is carried out by means of an electromechanical actuator for converting an electrical signal into a mechanical force. The electromechanical actuator may be controlled by a control and regulation electronic circuit. A targeted influence and change in the acceleration and force pulse form can be achieved.

The invention relates to a water purifier and discloses a water purifier capable of intelligently discharging concentrated water. The water purifier comprises a water purifier body (1), wherein the water purifier body (1) internally comprises a filter element (101), a water pump (102) and a first reverse osmosis filter element (103) which are sequentially connected by virtue of pipelines, a concentrated water pipeline (106) of the first reverse osmosis filter element (103) is connected with a concentrated water discharge pipeline (107) and a reflux pipeline (108) connected with the water inlet of the water pump (102), two concentrated water discharge branches (109) which are connected in parallel are arranged on the concentrated water discharge pipeline (107) and a discharge solenoid valve (110) is arranged on each of the concentrated water discharge branches (109). By virtue of the water purifier, the reasonable utilization of the concentrated water can be achieved, the problem of waste of water sources is effectively solved and the reasonable discharge of the concentrated water can be achieved so that the operation of the water purifier is more energy-saving and efficient.

The invention relates to a trommel screen device and a method used for sorting domestic garbage. The device comprises a roller brush, a roller, a speed reducer, a motor, a scraping plate, a base, screen meshes, a guide plate, a screening hopper and a riddling outlet, wherein the screen meshes are circular holes, the aperture is 80mm, and the aperture ratio is 75 to 85 percent; both sides of equipment are respectively provided with the telescopic roller brush and the scraping plate, which can clear obstacles in the screen meshes and burs outside the roller; and the entire trommel screen deviceis horizontally arranged, the guide plate is arranged inside the roller, and the domestic garbage in the roller turns and moves forward along the guide plate. When the device is used for sorting the domestic garbage, the rotational speed of the trommel screen is controlled to be 10 to 20r / min, and the sorting efficiency of the domestic garbage with the grain diameter below 80mm is as high as 93 percent. The domestic garbage sorting method involved with the invention has high efficiency, low energy consumption and easy maintenance.

An embodiment of a rail vehicle may comprise at least one passenger receptacle; a device configured to generate a driving and / or braking force; a transmitting device for transmitting the driving and / or braking force onto a circuit; and at least one actuating device configured to exert a control over at least one of the vehicle's speed and acceleration. The transmitting device has a first engagement element configured for positive engagement with a compatible second engagement element arranged stationarily on the circuit, and a control unit. The control unit is configured to provide control signals to the device for generating the driving and / or braking force which are independent or dependent from the control exerted through the at least one actuating device. The control signals, at least intermittently, limit or shut off the control via the at least one actuating device or superimpose on the control via the at least one actuating device.

The invention discloses an air conditioner system control method and system and an air conditioner. The air conditioner control system comprises the steps of judging whether a first coolant coefficient ranges from a first lower limit threshold value to a first upper limit threshold value or not after a compressor operates for preset time in a heating mode; adjusting the opening degree of an electronic expansion valve of an indoor unit according to the pipe temperature of an indoor heat exchanger so as to change the circulation volume of a coolant in time if the first coolant coefficient rangesfrom the first lower limit threshold value to the first upper limit threshold value; increasing the opening degree of the electronic expansion valve of the indoor unit if the first coolant coefficient is greater than the first upper limit threshold value, and otherwise, decreasing the opening degree of the electronic expansion valve of the indoor unit. Through the air conditioner system control method, the air conditioner system can be made to have the optimal coolant circulation volume all the time, it is ensured that the air conditioner system operates in a more efficient and energy-savingmode, and use experience is improved.

The invention discloses a data center air-conditioning system. The data center air-conditioning system comprises a heating pipe system, a mechanical refrigerating system and a backup system. The datacenter air-conditioning system has three operation modes which include the heating pipe mode, the mechanical refrigerating mode and the mechanical refrigerating and heating pipe simultaneous operationmode. The best operation mode is selected according to the different outdoor temperature conditions, and efficient energy-saving operation of the air-conditioning system is guaranteed. A cold accumulation tank is additionally disposed in the air-conditioning system, and cold accumulation is performed on the cold accumulation tank when the air-conditioning system works normally; when the mains supply breaks down, the refrigerating capacity of the cold accumulation tank is provided for a data center, so that safe operation of the system is guaranteed; and meanwhile the air-conditioning system adopts the modularized separated systems, so that the system safety is further improved.

The invention relates to an energy-saving centralized air conditioning dehumidification system for a tobacco mellowing warehouse and a control method of the energy-saving centralized air conditioning dehumidification system. The system comprises a heat recovery type air-cooled heat pump unit, a roof type air handling unit, a freezing water supply and return pipeline, a heat recovery water supply and return pipeline, an air supply pipeline, an air return pipeline and an automatic control system matched with the system, wherein the roof type air handling unit is connected with the heat recovery type air-cooled heat pump unit through the freezing water supply and return pipeline and the heat recovery water supply and return pipeline; the roof type air handling unit supplies air subjected to handling to all floors or all tobacco storage regions through the air supply pipeline and the air return pipeline, so that air circulation is achieved. Compared with a traditional distributed dehumidifier for the tobacco mellowing warehouse, the energy-saving centralized air conditioning dehumidification system for the tobacco mellowing warehouse has the technical advantages of being efficient in operation, capable of saving energy, reasonable in temperature and humidity control, low in initial equipment investment, low in maintenance workload and the like.

An energy-saving control method of a hydraulic system of hydraulic rolling shear belongs to the technical field of hydraulic transmission control of the hydraulic rolling shear. The hydraulic system comprises variable-frequency motors, a frequency converter, a PLC (programmable logic controller), plunger pumps and hydraulic valves. The energy-saving control method of the hydraulic system of the hydraulic rolling shear is characterized in that action commands of two hydraulic cylinders of the hydraulic rolling shear are input into the frequency converter through the PLC, and the frequency converter changes the rotational speeds of the variable-frequency motors according to commands of the PLC to enable the plunger pump group to variably output hydraulic oil. The hydraulic system can adjust the oil supply amount of the plunger pumps according to requirements of steel plate shearing of the hydraulic rolling shear at any time, after the steel plate shearing is finished, the variable-frequency motors stop rotating according to commands, accordingly the plunger pumps stop supplying the oil to the system, and at the time the hydraulic system is in a non-energy-consumption state to reduce energy loss.

The invention relates to the field of air conditioners and discloses a local air supply system based on a bed. The local air supply system based on the bed comprises an upper air supply bellows, a lower air supply bellows, the bed, an upper air supply outlet, a lower air supply outlet, an air pipe connector, an air pipe and a three-way valve. The bed has the certain height and divides a room to be an upper local space and a lower local space which are different in use function, wherein the upper local space is an upper sleeping area and the lower local space is a lower working area. By selecting different air conditioner air supply branches or supplying air to the upper air supply bellows, the temperature of air of the upper sleeping area of the bed is controlled; or by supplying air to the lower air supply bellows, the temperature of air of the working area is controlled. The upper air supply outlet and the lower air supply outlet are respectively provided with a guide device, so that the air conditioner wind airflow direction is adjusted within the large range. According to the local air supply system based on the bed, hot wind of an air conditioner under the heating operating condition in winter can be conveyed to the lower layer indoors, so that not only is the thermal comfort of the air conditioner improved, but also heat energy gathered at the upper layer indoors in winter can be utilized, and the energy-saving type local air conditioner air supply system is flexible to adjust, remarkable in effect and large in air conditioner control area.

The invention provides a cold energy recovering type variable-capacity air-source heat pump system, and relates to heating and refrigerating combined systems which alternatively or synchronously run. The cold energy recovering type variable-capacity air-source heat pump system is characterized in that a first subsystem and a second subsystem share a double-channel variable-capacity heat exchanger, wherein a heat exchanger body comprises two refrigerant tube-pass pipelines which are independent from each other; refrigerants in the two channels synchronously exchange heat with hot medium water in a shell-pass pipeline; water medium heat supplying circulating is created by the shell-pass channel through a hot water circulating pipeline and a hot water circulating pump; the first subsystem and the second subsystem are connected to the two refrigerant pipe-pass channels through control valve sets, thus constructing a dynamic controllable refrigerant circulating loop; a heat pump system is that the opening-closing state of the control valve sets of the double-channel variable-capacity heat exchanger is controlled, and the double-channel capacity variation mode is realized through the double-channel variable-capacity heat exchanger, thus the heat exchange area of a shell-pipe type heat exchanger can be effectively utilized, and as a result, the requirement of stable power output under large-load condition can be met; the overall running efficiency of an unit can be greatly improved, and the high energy efficiency running of the heat pump system can be realized.

The invention provides a frequency conversion heat pump water heater and the frequency conversion control method thereof. The frequency conversion heat pump water heater comprises a water tank, heat exchange tubes, a frequency conversion compressor and a controller, wherein the heat exchange tubes are positioned in the water tank and provided with a plurality of heat exchange tube branches connected in parallel, the frequency conversion compressor is connected in series with the heat exchange tubes, and the controller is used for controlling running frequency of the frequency conversion compressor and opening quantity of a plurality of the heat exchange tube branches connected in parallel according to a demand signal of a user. The frequency conversion heat pump water heater provided by the invention has the advantages that the running is more efficient and saves energy, meanwhile, unnecessary hot water waste and heat preservation loss of the water tank are reduced.

The invention provides a water source heat pump intelligent centralized control all-in-one machine capable of spontaneously changing flow, which aims at saving the energy and being convenient to install, use and maintain. The all-in-one machine comprises a water source pipeline with a water-source-side water return port and a water-source-side water supply port, a user pipeline with a user-side water return port and a user-side water supply port and a heat pump unit which is used for the user pipeline and the water source pipeline to exchange the heat, both the user pipeline and the water source pipeline are respectively provided with a water pump, a flow meter and a temperature sensor, a pressure difference transmitter is arranged between the user-side water return port and the user-side water supply port of the user pipeline, a bypass branch is arranged between the user-side water return port and the user-side water supply port, and the bypass branch is provided with a continuous electric two-way valve; and the heat pump unit, the water pump, the flow meter, the temperature sensor, the pressure difference transmitter and the continuous electric two-way valve are connected with a controller. Due to adopting the water source heat pump intelligent centralized control all-in-one machine, the variable-flow control can be realized, the high-efficient and energy-saving running of the unit can be guaranteed, and simultaneously compactness and reliability in structure and convenience in installation, use and maintenance can be achieved.

The invention discloses a control method of an air conditioner. The air conditioner comprises a compressor. The operation frequency of the compressor has a plurality of operation ranges through setting. The different operation ranges are in one-to-one correspondence with different preset temperature ranges. The control method comprises the following steps that 1, the temperature value T1 in a room where the air conditioner is located is collected; and 2, the obtained temperature value T1 is compared with the temperature value Ts set by a user, and the frequency operation range of the compressor is adjusted according to a comparison result. A control device comprises a temperature collecting module and a compressor frequency control module. According to the control method and device of the air conditioner, the operation frequency of the compressor is controlled through temperature change, the refrigerating capacity of the air conditioner is adjusted intelligently, the intelligence level of the air conditioner is improved, and the experience of the user to the air conditioner is better; and in addition, through the control method and device, energy consumption of the air conditioner is reduced, and the energy saving effect of the air conditioner is better.

A modular unit has at least one filter (10), pump (12) and cooling unit (14) fluidically connected to each other by a connection module (16) and connected to a tank unit (18). The connection module (16) opens out inside (22) the tank unit with a suction opening (20), together with the cooling unit (14) when the tank unit is connected (18). The filter unit (10) and pump unit (12) are arranged outside the tank unit (18). The modular unit can then be placed on and connected to a tank unit. The cooling unit protrudes inside the tank unit.

The invention relates to an evaluation and rectification method based on operation conditions of rod-pumped wells in a whole block. Relevant data in an A2 database are extracted; the load rate, the torque load rate and the power load rate are worked out, and ground efficiency, underground efficiency and system efficiency are worked out through indicator diagram data; and evaluation criterions of key nodes such as the rod-pumped well system efficiency, the motor load rate, the reduction gearbox load rate, the polished rod load rate, the pump discharge coefficient and the submergence depth, and corresponding rectification measures are established. The operation conditions of the rod-pumped wells in the whole block are considered, the wells to be rectified are screened out according to the evaluation criterions, the numbers of the wells are listed, the specific rectification measures are proposed for the wells according to specific problems, and the reliable technological method is provided for efficient and economical management of the wells in the whole block.

The invention discloses a refrigerator behavior control method and device based on machine learning and a refrigerator. The method comprises the steps of obtaining current time of the refrigerator; inputting the current time into a refrigerator behavior prediction model, and outputting identification information of a forecasting behavior, wherein the refrigerator behavior prediction model is obtained based on a machine learning algorithm according to running data of history time points of the refrigerator; and according to the identification information of the forecasting behavior, controllingthe refrigerator to carry out the behavior corresponding to the forecasting behavior. Compared with the prior art, the refrigerator behavior control method based on machine learning has the advantages that according to statistics of the running data of the history time points of the refrigerator, the refrigerator behavior prediction model based on machine learning is built, the refrigerator behavior is predicted, according to the predicted behavior, the refrigerator is controlled, the refrigerator provides a humanized service for a user, and meanwhile, running of the refrigerator is more energy-saving and efficient.

The invention discloses a production process of ursodeoxycholic acid. The production process includes using the chenodeoxycholic acid as a substrate, conducting catalytic reaction through 7alpha-hydroxysteroid dehydrogenase and / or thallus containing the 7alpha-hydroxysteroid dehydrogenase; filtering an obtained product through a ceramic membrane to remove zymoprotein or the thallus to obtain 7-ketolithocholic acid; using the obtained 7-ketolithocholic acid as a substrate to conduct catalytic reaction with the7beta-hydroxysteroid dehydrogenase and / or thallus containing the 7beta-hydroxysteroiddehydrogenase; filtering an obtained product with the ceramic membrane to remove the zymoprotein or the thallus to obtain crude ursodeoxycholic acid, making the crude product to pass through an ultrafiltration membrane to remove small molecular protein impurities to obtain an ursodeoxycholic acid ultrafiltration membrane clear solution and then conducting nanofiltration membrane concentration, resin discoloration, concentration and drying. Compared with the prior art, the production process can improve the quality and the yield of the ursodeoxycholic acid and reduce the production cost.

The invention provides a semi direct drive permanent magnet motor. A motor stator is mounted on the inner side of a motor housing. The motor stator is provided with a motor winding. A reducer input shaft penetrates through a reducer housing and a connection end cap and is mounted in the motor housing. The connection end cap is fixed on the reducer housing. The reducer input shaft is connected witha motor rotor through a shaft sleeve. The shaft sleeve end part is fixed on the reducer input shaft through a shaft sleeve barrier board. According to the invention, the semi direct drive permanent magnet is adopted for replacing a prior asynchronous motor and belt for driving. The invention has advantages that (1) the drive part is reduced in space occupancy; (2) a belt wheel is saved and belt maintenance and change are saved and influence on conveying efficiency due to belt pre-tightening force can be avoided; (3) influence on energy efficiency of the permanent motor due to load rate is almost none and the motor keeps high energy efficiency operation all the time, so that an energy conservation effect is distinct; (4) a reducer is used for fixing the motor stator and is connected with arotor coaxially, so that a simple and reliable structure is realized and a low cost is achieved.

The invention discloses an intelligent cooling coil fault detection and diagnosis method and device based on Bayesian reasoning and virtual sensing. Based on the heat transfer equation and the energyconservation equation, a target function of virtual sensing of the offset of the temperature sensor and the heat exchange performance of the cooling coil is established; a posterior distribution probability density function of sensor offset and cooling coil heat exchange performance virtual sensing is established through Bayesian reasoning, probability distribution of related parameters is obtained through a Markov chain Monte Carlo method, then the sensor offset is corrected, and the fault level of the cooling coil heat exchange performance is determined. According to the method, measured value data sets of the water side and air side temperature sensors of the cooling coil, which are obtained by real-time measurement, are input into the target function, so that correction results of allparameters are obtained. The result is input into the cooling coil control system, accurate in-situ correction of the offset of the sensor can be achieved, the heat exchange performance fault level ofthe cooling coil can be measured, then faults are removed, and energy-saving and efficient operation of the cooling coil system is achieved.

The invention discloses a water tank adjustment and storage variable voltage transformation pipe network pressure-superposed water supply device which mainly consists of a stainless steel water tank, a water level sensor, a water pump, a flow meter, an air pressure water tank and a control cabinet. The stainless steel water tank is arranged in front of a water suction header pipe of the water pump, a tap water inlet pipe is connected with a water inlet of the stainless steel water tank through a water tank control valve, a water outlet header pipe of the water pump is connected to a water using point for water supply through the flow meter and a user pipe network, the flow meter is used for detecting water using amount and feeds the water using amount back to the control cabinet, the control cabinet determines a corresponding pressure value according to a characteristic curve model of the user pipe network and uses the pressure value to conduct pressure control of the water outlet header pipe of the water pump. The water tank adjustment and storage variable voltage transformation pipe network pressure-superposed water supply device has the advantages of being large in adjusting flow, good in water supply safety, efficient in operation, capable of saving energy, low in cost and the like and being suitable for the occasions of long user pipe network or often insufficient pressure of a tap water pipe network or interrupted or insufficient flow.

The invention discloses a multi-heat-source annular heat supply network hydraulic optimization scheduling method based on a PSO algorithm. The method comprises the following steps: (1) determining user flow demands, the number of heat sources, inertia weights, self-learning factors, group learning factors, the number of group particles and iteration times z of each heating station according to actual conditions of a heat supply network; (2) setting the working condition k to be equal to 0 and setting an initial iteration value; (3) calculating the flow of each branch, the branch impedance of the heating station, the node pressure of the water supply pipe network and the node pressure of the water supply pipe network; (4) calculating the total power consumption of the circulating pump of the heat source, calculating to obtain an individual optimal value of the particles, and obtaining a global optimal value of the particles; and (5) when k is greater than or equal to z, outputting the globally optimal solution and the total power consumption of the circulating pump of the heat source corresponding to the globally optimal solution. On the premise of meeting the specific flow requirement of each heating station, the flow distribution of each heat source and the impedance of the primary side valve of the heating station are adjusted online in real time, and the optimization targetof the minimum total energy consumption of the circulating pump of all the heat sources is achieved.

The present invention discloses a highly-efficient and energy-saving vegetable washing device. The highly-efficient and energy-saving vegetable washing device comprises a first washing mechanism, a second washing mechanism and a water box. The first washing mechanism comprises a first shell body, a first sieve, a second sieve and a first partition baffle are horizontally arranged from top to bottom inside the first shell body, an upper surface of the second sieve is provided with an annular slide, a first material guiding mouth, a push rod and a cover body, a lower surface is provided with a first material guiding pipe communicating with the first material guiding mouth, the first partition baffle is provided with a plurality of first through-holes, and a lower end of each of the first through-holes is hingedly connected with a valve plate; and the second washing mechanism comprises a second shell body and an inside of the second shell body is provided with a second material guiding pipe, a water storage tank, a rotating frame, a stirring rod and a plurality of second partition baffles. By designing the two washing mechanisms, the highly-efficient and energy-saving vegetable washing device realizes twice washing process operations for vegetables, and the twice washing processes are automatically continuous. Besides, the highly-efficient and energy-saving vegetable washing device is simple in structure, easy to operate, and highly-efficient and energy-saving in washing, and has relatively high market promotion value.

The present invention provides a hoisting system of stripper well in oil field. The invention mainly settles the problems of high operation cost, more initial investment, large dimension of unit assembly and large deadweight. The invention is characterized in that the hoisting system of stripper well in oil field is composed of a double flexible pumping unit, a double flexible pumping unit wellhead and a composite functional unit sucker rod string. The hoisting system not only has low operation cost when operating on the stripper well, but also has the characteristics of less initial investment, small dimension of unit assembly and small deadweight.

A method for monitoring and hierarchically controlling pipeline thermal insulation status based on a dynamic envelope curve method comprises: establishing a method for evaluating the thermal insulation status of in-service pipelines and determining whether the pipelines need to be reconstructed; monitoring the temperature of the in-service pipelines with thermal insulation performance levels belowC, and installing optical fiber temperature measurement systems each consisting of a temperature controller and a temperature measuring optical fiber on the outer walls of the thermal insulation layers of the monitored pipelines for monitoring; installing 4G wireless routers on the outer walls of the thermal insulation layers of the in-service pipelines, and connecting the 4G wireless routers tothe temperature controllers through 232 interfaces to realize real-time data transmission and data monitoring; building an online monitoring system platform in a host PC; drawing a trend value point diagram of pipeline thermal insulation heat loss per unit area and pipeline total heat loss, and drawing a pipeline thermal insulation effect dynamic envelope curve on the diagram; performing pipelinethermal insulation effect control based on the pipeline thermal insulation effect dynamic envelope curve. The method can diagnose the occurrence of pipeline thermal insulation material failure early,and can take corresponding measures in time.