41 results about "Discharge return" patented technology

A semiconductor integrated circuit that protects a secondary battery by controlling an on/off status of a discharge control switch and a charge control switch includes an over discharge detection part configured to detect an over discharge condition based on a battery voltage of the secondary battery, a load removal detection part to detect whether a load connected to the secondary battery is removed based on a voltage of a load removal detection terminal connected to a negative electrode side of at least one of the load connected to the secondary battery and a battery charger through a resistor, an over discharge return part to return to a normal condition from the over discharge condition, and a control part to output a control signal for returning the over discharge condition to the normal condition to the over discharge return part upon detecting the load being removed in the over discharge condition.

The invention discloses an air conditioner control method. The air conditioner control method comprises the steps that a compressor discharge pressure value of an air conditioner and the outdoor environment temperature are obtained during refrigerating operation of the air conditioner; when the compressor discharge pressure value is smaller than a first preset pressure value or the outdoor environment temperature is lower than a first preset temperature value, any one of a plurality of outdoor heat exchangers on an outdoor unit of the air conditioner is closed; a current compressor discharge pressure value and an indoor evaporator temperature of the air conditioner are obtained; and an electromagnetic valve of the air conditioner is controlled to be opened or closed according to the current compressor discharge pressure value and the indoor evaporator temperature so that the return air pressure of a compressor can be adjusted. The invention further discloses an air conditioner control device and the air conditioner. According to the air conditioner control method and device and the air conditioner, the discharge return air pressure of the compressor is adjusted by opening or closing the electromagnetic valve, and low-pressure protection of the compressor is achieved. Meanwhile, frequent starting and stopping of the compressor are reduced and low-temperature protection of an evaporator is achieved.

The invention discloses a sediment removal machine for removing sediment at the bottom of a pile and a working method thereof. The sediment removal machine comprises a sediment removal device and a main controller for controlling work of the sediment removal device. The sediment removal device comprises an outer cover, a sediment suction tube for sucking the sediment is arranged in the outer cover, and the bottom end of the sediment suction tube extends out of the outer cover so that the sediment at the bottom of the pile can be sucked into the outer cover. At least one layer of sediment filter screen is arranged between the outer cover and the sediment suction tube. The positions where the sediment filter screens are located are lower than an outlet of the sediment suction tube. A water outlet is formed in the bottom surface of the outer cover so as to discharge return mud flowing down the sediment filter screens. A sediment amount sensor is arranged on the upper portion of the inner side face of the outer cover and connected with the main controller. Mud displacement does not exist, mud pouring is not needed, the automation degree is high, operability is high, the sediment removal efficiency and effect are improved, the hole collapse risk caused by mud displacement is avoided, and the problem that the environment is polluted because a large amount of mud is used is solved.

A method using the gasoline hydrogenation to desulfurize is provided, which is carried out in a catalytic distillation column. The catalytic distillation column is divided into a rectification process section, a fractionation section, a stripping reaction section and a stripping section from top from bottom. The preheated raw materials are led into the fractionation section and the hydrogen is led into the bottom of the stripping section; the lighter components fractionated from the fractionation section enter into the section and conduct hydrodesulfurization reaction with the hydrogen under the contact with hydrodesulfurization catalyst A; the discharge on the tower top gains the liquid after cooling and separating; one part of the discharge returns to the rectification process section as the overhead reflux and the other part works as the desulfurized products 1; the heavier components fractionated enter the stripping reaction section and conduct hydrodesulfurization reaction with the hydrogen under the contact with hydrodesulfurization catalyst B and is discharged from the reboiler on the tower bottom after the a stripping section further separates the H2S to work as the desulfurized products 2. The method provided by the invention can obviously improve the rate of the desulfurization of gasoline and have low loss of the octane number of the gasoline.

The invention provides an electromobile high integration density control system which comprises a power battery pack, an inverter circuit, an integrate control unit, a drive motor and an alternating current power supply, wherein the control unit is electrically connected with the power battery pack through a positive-negative bus, a control end of the inverter circuit is electrically connected with the integrate control unit, an input end of the inverter circuit is electrically connected with the power battery pack, an output end of the inverter circuit can be respectively and electrically connected with the drive motor and the alternating current power supply in sequence or be used as the input end to be electrically connected with the alternating current power supply, and a drive motor control return circuit, a battery discharge return circuit and a battery charge return circuit are respectively formed. According to the electromobile high integration density control system, integrated control of charging and discharging of an electromobile and drive motor control is achieved, sharing of components is achieved, using efficiency of the components is improved, system arrangement is simplified, and size and weight of the electromobile control system are effectively reduced.

The invention relates to a large capacity square-wave impacting current generator, which is particularly applied to a test on a super high voltage lightning arrester. The invention comprises a charging return circuit and a discharging return circuit, wherein the charging return circuit comprises a voltage regulating device, a high voltage test transformer, a high-voltage silicon stack, a charging protecting electric resistance, a capacitance and a wave regulating electric inductance which are electrically connected in turn, the discharging return circuit comprises a capacitance, a wave regulating electric inductance, a discharging gap G, a tube type diffluence device Rs and a test product Rx which are electrically connected in turn, and the capacitance and the wave regulating electric inductance are formed into an L-C energy storing unit. The invention is characterized in that the L-C energy storing unit is a double chains parallel type or multiple chains parallel type, which has the advantages of large current amplitude which is generated, easy quality control for unit components, convenient wave regulation and amplitude modulation, long service life of a whole device and the like.

The invention discloses a control system and control method for a pitch oil cylinder of a stacker-reclaimer. The control system is formed by connecting rodless cavities of a left pitch oil cylinder and a right pitch oil cylinder in an original system with an automatic flow discharge return circuit composed of a pressure relay, a pressure sensor, a proportional overflow valve and an electromagnetic on-off valve. Rod cavities of the left pitch oil cylinder and the right pitch oil cylinder are connected with an oil feeding return circuit composed of a check valve and a pipeline. The control method is that when a cantilever of the stacker-reclaimer is close to the nearby area of the lower limit of the cantilever and makes falling motion, original oil feeding to the rod cavities through a hydraulic pump is replaced with check valve oil feeding and flow discharge of the automatic flow discharge return circuit, so that return circuit oil exudation, oil leak, seal damage, even pipe explosion and other negative factors generated due to the fact that the service life of the oil cylinder is influenced by the larger pressure of the rodless cavities in an original return circuit compared with the rated working pressure of the oil cylinders are avoided, and work security and reliability of the system is guaranteed.

The invention discloses a hydraulic drive system of a traveling system of an engineering vehicle. The hydraulic drive system comprises a variable displacement pump connected with a power device, a variable displacement motor, and a displacement control loop, wherein the variable displacement pump is connected with a power device and is provided with a first port and a second port, and the first port and the second port are used for discharging return oil; the variable displacement motor is connected with a gearbox, and comprises a first oil inlet and outlet opening communicating with the firstport, and a second oil inlet and outlet opening communicating with the second port; the displacement control loop is used for controlling displacement of the variable displacement motor according tochange of the working load; an oil inlet of the displacement control loop is selectively connected with the first port and the second port; and an oil outlet of the displacement control loop is connected with a variable displacement mechanism of the variable displacement motor. The hydraulic drive system can shift a gear when the variable displacement motor gains power, and loaded gear shifting ofthe variable displacement motor is achieved. The invention further discloses the engineering vehicle comprising the hydraulic drive system.

A CO2 fracturing displacement integrated oil extraction for aiming at a tight oil reservoir is characterized by comprising the steps of successively performing fracturing and displacement on segmentedunits in a direction from the toe part of a horizontal well to the heel part, and in a fracturing period, performing segmented closed fracturing on the horizontal wall by means of liquid carbon dioxide; and in the displacement period, after cracks of the horizontal wall segmented unit are generated through fracturing, injecting high-pressure carbon dioxide into the segmented unit for performing segmented closed displacement. According to the method of the invention, an always CO2 injection state is utilized, thereby realizing no discharge returning and obtaining functions of sand carrying, seam generation, stratum energy supplementing and displacement. Not only is fracturing liquid effectively used for supplementing energy, but also tight oil reservoir displacement oil extraction is realized. Furthermore an injection amount and an injection time length can be selected according to an actual development requirement, thereby realizing integration of reservoir yield increase fracturing reconstruction and displacement.

The invention discloses a jet flow control-type fertilization pump, and relates to the field of fluid machines. The jet flow control-type fertilization pump comprises a water collecting nozzle, a leftrubber guide pipe, an air make-up t-branch pipe, a reverse air make-up hole, a right rubber guide pipe, a water inlet nozzle, a jet flow component including a movable wedge and a draining channel, ahydraulic cylinder and a piston. The hydraulic cylinder system is divided into a driving cavity, a reset cavity, a buffer cavity and a fertile solution cavity through the piston. The outlet section ofthe jet flow component is divided into two outlet flow channels through the movable wedge. The left side flow channel communicates with the driving cavity, and the right side flow channel communicates with the reset cavity. The draining channel is used for discharging return water in the fertilization pump. The reverse air make-up hole supplements air of a left cavity to form the pressure difference so that jet flow can be attached to the right side wall face. The water inlet nozzle collects water and air intermittently, a low-pressure vortex area can be formed at the right side of main jet flow intermittently and the wall-attaching and perpendicular incidence state of the water flow is formed. The piston is driven to move in a reciprocating mode, and the fertilizer filling and applying processes are implemented. The jet flow control-type fertilization pump is simple in structure, stable and reliable, the number of complicated reversing mechanisms is reduced and the jet flow control-type fertilization pump is used in the irrigation and fertilization fields of micro irrigation, low-pressure pipelines and the like.

The invention discloses an energy saving system of a light emitting diode (LED) lamp driven by lithium power. The energy saving system of the LED lamp driven by the lithium power comprises an electric power storage driving unit, an alternating-current driving unit and a time control unit, wherein the electric power storage driving unit is used for providing power for the LED lamp in a selected time span, the alternating-current driving unit is used for providing power for the LED lamp in another selected time span and charging the electric power storage driving unit, the time control unit is used for the disconnection of an LED lamp and electric power storage driving unit charging return circuit with the alternating-current driving unit and the connection of the LED lamp and an electric power storage driving unit discharge return circuit in a selected time, and the time control unit is also used for electric connection of the LED lamp and electric power storage driving unit charging return circuit with the alternating-current driving unit and disconnection of the LED lamp and the electric power storage driving unit discharge return circuit in another selected time span. According to the energy saving system of the LED lamp driven by the lithium power, an electric power storage system is charged and power is provided for the LED lamp in power utilization trough, the electric power storage system is used for providing power for the LED lamp in power utilization peak, and then the power stored in the power utilization trough is used in the power utilization peak, difference between the power in the power utilization trough and the power in the power utilization peak is effectively relieved, stand-by energy consumption of power generation devices in power supply departments is reduced, and energy saving and emission reduction are achieved.

The invention discloses a processing technology for purifying pollutants in four hard-shelled seawater shellfishes like Ruditapes philippinarum, Meretrix meretrix, Cyclina sinensis and Tegillarca granosa through an ultraviolet seawater treatment technology. The technology provided by the invention comprises a semi-closed circulation system, and is performed in a temperature-adjustable indoor environment. The technology is implemented through the following six steps: subjecting shellfish to picking, performing cleaning and basketing, then placing the basketed shellfish in a purifying pond, pumping deep-well seawater of which water quality meets the requirements into a circulation water pond, then transporting the seawater into an ultraviolet sterilizer through a water pump and carrying out sterilization, ejecting the sterilized seawater into the purifying pond according to process parameters to purify the shellfish, then discharging return water into the circulation water pond again, and carrying out repeated circulation until the shellfish product hygienic quality standard or purification with a minimum time of 24 hours is achieved so as to complete a batch of a purification processing process. The processing technology provided by the invention has the advantages of significant pollutant removal effects, strong vitality of purified shellfish, simple process, low investment, etc.

The invention discloses a fertilizing and seeding device of a field managing machine. The fertilizing and seeding device comprises an operation bracket, wherein supporting and travelling wheels are arranged on two sides of the lower end of the operation bracket respectively, an operation base is arranged under the operation bracket, a fertilizing and seeding pipe is mounted on the operation base, the rear end opening of the fertilizing and seeding pipe is arranged downwards in a sloped manner, a cover plate arranged at the front end opening of the fertilizing and seeding pipe in a covering manner is mounted on the operation bracket, a feed opening corresponding to the front end opening of the fertilizing and seeding pipe is formed in the cover plate, a discharge plate positioned under the feed opening is connected to the operation bracket through pin shafts, a discharge pulling wire is arranged on one side of the discharge plate, the discharge pulling wire extends upwards to the operation bracket, and a discharge returning spring is connected between the other side of the discharge plate and the operation bracket. The fertilizing and seeding device disclosed by the invention is simple and convenient to control, convenient to fertilize or seed, and accurate to position, so that the labor intensity of a worker is greatly reduced, and the operation efficiency is effectively improved.

The invention discloses a mixed xylene deolefination refining device and method. The device comprises a pre-refining tank, a mixed xylene fractionation column, a refining tank, a feeding heat exchanger, a discharging heat exchanger and a centrifugal pump. A C8 fraction is withdrawn from the side line above some column plate in 1-5 column plates counted from the top of the mixed xylene fractionation column downwards and used for feeding of the top of the refining tank, and tank bottom discharging returns from the side line above some column plate in 6-10 column plates counted from the top of the mixed xylene fractionation column downwards; and the top of the refining tank is at the 5-column-plate distance from the withdrawing position of the side line of the mixed xylene fractionation column, and the bottom of the refining tank is at the 5-column-plate distance from the return position of the side line of the mixed xylene fractionation column, mixed xylene products are produced from the top of the column, and polymers are discharged along with column reactor C9+ heavy components. By the adoption of the mixed xylene deolefination refining device and method, the purpose that the polymers can be separated without additionally arranging a separation column or other equipment and the qualified mixed xylene products are obtained is achieved; the service cycle of a catalyst can be prolonged, the cost is lowered, and high-quality chemical raw materials are obtained; and the good comprehensive benefits are obtained.