38results about How to "Reduce frequent movements" patented technology

The invention provides expansion valve components, a one-way expansion valve and a two-way circulation expansion valve, belonging to the technical field of refrigeration of variable frequency air conditioners. The invention solves the problem that the service life of a valve is shortened due to frequent abrasion of the conventional valve cores and the conventional vale bases. The two-way circulation expansion valve comprises a valve block which is provided with two parallel channels, wherein each channel is provided with an inlet end and an outlet end; an expansion valve component which is provided with a damping structure is connected to each outlet end; a bypass hole for communicating an outlet of the expansion valve component on one channel with the inlet end of the other channel is formed in the valve block; and a protection cover for preventing a medium from being leaked when flowing through the bypass hole and the outlet is welded at each outlet end. The two expansion valve components are arranged in parallel to ensure that a function of two-way circulation is realized; and the movement of a valve core is reduced by the damping structures, so that the service life of the expansion valve components is prolonged and the energy efficiency ratio of the expansion valve components is improved, thereby being of great significance for energy conservation and emission reduction.

The invention discloses a real-time charging optimization method for electric vehicle cluster based on clustering control, and relates to the field of real-time charging in electric vehicle cluster, which comprising the following steps of: step 1, based on a distributed layered control framework, performing a queue division on the EV cluster by taking the charging end time as a judgment amount; step 2, according to the charging characteristics of EV cluster, the queue division of EV cluster is conducted by taking the end of charging as a criterion; step 2, a real-time optimization model of charging and discharging power for EV cluster with the objective of minimizing daily load fluctuation is solved, real-time optimization of charging and discharging power of EV cluster is carried out, andsecurity constraints are checked by distribution network; step 3, on the basis of an EV cluster scheduling result, the charging and discharging costs of EV owners are considered, a power allocation model in EV cluster is solved, the optimal power allocation for charging and discharging power of a single EV in the EV cluster is obtained, so that the total output of the EV cluster is as close as possible to the scheduling result. By means of the device, EV charge and discharge distributed layered control framework is adopted, thereby realizing the real-time control of charging and discharging in EV cluster.

The invention discloses a primary frequency modulation control method and system for a wind power plant. A wind power plant power distribution strategy by using overspeed load shedding control is used. The method comprises the steps that: after a wind power plant receives a system scheduling instruction, power requiring load shedding is calculated according to wind speed information fed back by all wind turbine generators, a power reference value and a load shedding control mode are distributed to all single machines, rotor kinetic energy of the wind turbine generators is stored to the maximumextent, and the frequency dynamic characteristic of a system is improved; and a variable parameter control strategy is utilized in frequency modulation control, the control strategy can ensure that afan can release the maximum standby power in the frequency modulation process, and the recovery speed after frequency drop is increased. It is guaranteed that each fan sufficiently releases standby power in the frequency modulation process, and a frequency steady-state value is effectively increased. The change of an inertia control coefficient can effectively improve the recovery speed of the frequency.

The invention provides a method for drying through a temperature sensor of a roller washing machine. The method is that three temperature sensors are arranged to operate. The method comprises the steps of 1, presetting T1max, T2min and T2max; 2, drying, namely, synchronously starting a condenser, a water feeding valve, a draining pump, a condenser, a blower pump and a heater, or starting to circulate hot water, and determining that the clothes are dried after any one of the two necessary conditions is met during drying; 3, dynamically detecting t1, and finishing drying when the t1 is less than 50 DEG C. According to the method, the three temperature sensors are matched to monitor and determine the state, and the determining method is the same and free of influence of the clothes load in the washing machine and the water content rate of the clothes, so that the drying effect can be accurately determined; a certain fuzzy artificial intelligence function is achieved.

The invention provides an expansion valve, belongs to the technical field of air conditioners, and solves the problem that the service life of the valve is shortened in the existing valve core of the expansion valve due to the frequent shocking of the force of a spring. The expansion valve comprises a shell provided with an inlet end and an outlet end, wherein the shell is internally provided with a valve body provided with an inner cavity which is of a straight tube shape, and the side wall of the valve body is provided with an inlet and an outlet which are communicated with the inner cavity and the shell; a distance sleeve used for obstructing the inlet and the outlet is arranged between the shell and the valve body, and the inner cavity is internally provided with a valve core I and a valve core II which can slide along the inner cavity and are matched with each other; a check ring is fixedly arranged in the middle of the inner cavity between the valve core I and the valve core II, and the two ends of the inner cavity are respectively provided with a spring assembly which can cause the valve core I and the valve core II to be provided with a moving trend to the check ring; and a damping structure is arranged between the valve core I and the valve core II and has a damping effect. Due to the existence of the damping structure, the valve core I approaches to the valve core II with a buffering process, therefore, the impulsion between the valve cores is reduced, and the service life of the expansion valve is prolonged.

The invention discloses a shooting mode switching system and method. The system comprises a detection module for detecting a pressure applied on a shooting terminal, a determination module for determining a force level of the pressure, and a switching module for realizing switching to different shooting modes of the shooting terminal according to the determined different force levels. According to the technical scheme, frequent motions of fingers during shooting mode switching can be reduced, so that the operation becomes convenient and rapid; and the user experience feeling is improved.

The invention relates to a wind turbine generator pitch angle control method which comprises the following steps: establishing an ELM based effective wind speed estimation model; obtaining effective wind speed information and corresponding output data within a period of time to train the effective wind speed estimation model; obtaining a feedback control signal: establishing a wind turbine generator digital model; defining an adjusting error, solving dynamic characteristics and a preliminary expression of a feedback control signal; estimating uncertainty and interference term of the mathematical model of the wind turbine generator; carrying out conversion treatment on the preliminary expression to obtain the feedback control signal; obtaining a feedforward control signal: and obtaining thepitch angle signal in the effective wind speed information and the unit corresponding output data within a period of time, and training the wind turbine generator dynamic nonlinear wind speed-pitch angle relation model, wherein the model can give the feedforward control signal on line in real time. With adoption of the wind turbine generator pitch angle control method, the situations that the load optimization effect of the traditional pitch angle controller is poor caused by inaccurate feedforward pitch angle information and the calculation is complicated caused by a unit linear model are avoided.

The invention provides a wind turbine generator independent variable pitch control optimization method and system based on a laser radar. The method comprises the following steps that numerical fitting is carried out on wind speed and height data, measured by the laser radar, in front of a wind turbine generator to obtain a real wind shear index and a real wind shear formula; the height of the central point of each blade is determined according to the azimuth angle of a wind wheel, and the wind speed values of the central points of three blades are determined according to the wind shear formula; fatigue load values are calculated under different wind shear indexes, and a critical wind shear index is determined; when the real wind shear index meets the starting condition set by the independent variable pitch control, the independent variable pitch control is started, the pitch angle adjustment coefficient of each blade is determined according to the wind speed values of the center points of the three blades, and three blade pitch angle set values under the independent variable pitch control mode are obtained; and otherwise, unified variable pitch control is performed. According to the method, fatigue load caused by unbalanced impeller thrust can be remarkably reduced, and the problem that the service life of parts such as a variable pitch drive and a variable pitch bearing is shortened due to the fact that variable pitch is too frequent can also be relieved.

The invention provides a bi-direction circulation expansion valve, and belongs to the technical field of air conditioners. The bi-direction circulation expansion valve solves the problem that an existing bi-direction circulation expansion valve is poor in sealing property due to a plurality of potential leakage points which are caused by a fact that two expansion valve assemblies are connected in parallel and a valve body is fixedly connected with a protection cover in a welding mode in the existing bi-direction circulation expansion valve. The bi-direction circulation expansion valve comprises a valve body which is provided with two inlet cavities. A first bi-direction valve assembly and a second bi-direction valve assembly are placed inside the valve body, and a valve cavity of the first bi-direction valve assembly is communicated with a valve cavity of the second bi-direction valve assembly. A first one-direction valve assembly is placed between a first outlet of the first bi-direction valve assembly and an inlet cavity of the second bi-direction valve assembly, wherein the first one-direction valve assembly is used for enabling refrigerating fluid to flow in through the first outlet and flow out from the inlet cavity. A second one-direction valve assembly is placed between a first outlet of the second bi-direction valve assembly and an inlet cavity of the first bi-direction valve assembly, wherein the second one-direction valve assembly is used for enabling the refrigeration fluid to flow in through the first outlet of the second bi-direction valve assembly and flow out from the inlet cavity of the first bi-direction valve assembly. The bi-direction circulation expansion valve has the advantages of being small in number of parts, simple in structure and easy to assemble.

The invention relates to a BFG boiler air supply optimization control method. The BFG boiler air supply optimization control method comprises the following steps that a flue gas oxygen content settingvalue of a target BFG boiler subtracts a flue gas oxygen content measurement value to obtain a flue gas oxygen amount deviation signal; the flue gas oxygen amount deviation signal is input into a PIcontroller, and the PI controller calculates the PI operation output amount based on control parameters; an air volume command is obtained through conversion of the blast furnace coal gas header coalgas flow rate; the air volume command is calculated through an oxygen amount correction command to obtain an air volume given value; the air volume given valve subtracts the actual measurement total air volume to obtain an air supply volume adjustment deviation signal; the air supply volume adjustment deviation signal is subjected to PI operation to obtain the blower variable frequency input quantity; and the blower variable frequency input quantity is used for adjusting the blower output. The BFG boiler air supply optimization control method enables air supply frequency conversion control torespond to the flue gas oxygen content deviation change to conduct continuous adjustment, quick response to the amount of the fuel quantity can be achieved, boiler combustion is stabilized, the systeminternal disturbance is suppressed, and the operational stability of a generator set is improved.

The invention provides a livestock heating electric heating plate. The livestock heating electric plate comprises an electric heating device, a reflecting layer, a heat insulating layer, a reinforcing mesh and concrete wrapped inside the reinforcing mesh, and is characterized in that a phase-change material is contained in the concrete. According to the livestock heating electric heating plate with the phase-change material added in the concrete, the heat storing capacity of the electric heating plate is increased by 8 to 10 times, the fluctuation of the temperature of the electric heating plate is reduced, the frequent action of the electric heating device is decreased, and the heat preservation time can be prolonged during power failure.

The invention relates to an adaptive front lighting system (AFS) control method and an AFS control device. The method comprises the following steps of: counting the frequency of occurrence of a lighting angle of each AFS headlight, and acquiring the lighting angle corresponding to the frequency of occurrence exceeding a threshold; and performing control to keep the lighting of the AFS headlight in the lighting angle. The method and the device avoid the frequent resetting of the lighting angle of the AFS headlight in the stopped state of a vehicle to make more humanized the AFS headlight, reduce the frequent movement and abrasion of an AFS kinematic pair and the running times of a system, prolong the service life of the system, ensure the reliability of the AFS and save the cost; and the AFS is implemented by a simple method without greatly altering the conventional AFS, and has relatively higher practicability.

The invention discloses a control system and a control method of a primary fan with a liquid resistance speed regulator, belongs to the technical field of automatic control of the primary fan with the liquid resistance speed regulator and aims to solve the technical problems that the primary fan system of the boiler in the prior art has not been put into automatic control, operates in the manual state all the time and has influences on the stable and economical operation of the boiler. The control system comprises a primary fan inlet baffle control device and a liquid resistance speed regulator control device, wherein the primary fan inlet baffle control device comprises a first function generator and a first adding device; the input end of the first function generator is connected to an input interface A; the output end of the first function generator is connected to a first input end of the first adding device; the liquid resistance speed regulator control device comprises a second function generator and a third adding device; the input end of the second function generator is connected to an input interface B; the output end of the second function generator is connected to a first input end of the third adding device. Through the control system and the control method of the primary fan with the liquid resistance speed regulator, the advantage that the boiler can operate stably and economically can be exerted.

A bidirectionally communicating expansion valve comprises a valve body (2) having two inlet cavities (2b). A first two-way valve assembly and a second two-way valve assembly are disposed inside the valve body (2); valve cavities (2a) of the first two-way valve assembly and the second two-way valve assembly communicate with each other; a first one-way valve assembly is provided between a first outlet (2d) of the first two-way valve assembly and the inlet cavity (2b) of the second two-way valve assembly and used to enable a refrigerant to flow from the first outlet (2d) to the inlet cavity (2b) and then flow to the outside; and a second one-way valve assembly is provided between a first outlet (2d) of the second two-way valve assembly and the inlet cavity (2b) of the first two-way valve assembly and used to enable a refrigerant to flow from the first outlet (2d) to the inlet cavity (2b) and then flow to the outside. The bidirectionally communicating expansion valve has fewer components and a simple structure, and is easily assembled.

The invention discloses a selective opening and closing type equipotential connecting device of a subway shield door and a control method of the device. The device is that a steel rail and the subway shield door are connected through an equipotential connecting wire; a connecting mechanism is arranged and is in a normal opening state; a voltage measuring device is used for measuring the potential difference between the steel rail and the subway shield door; a connecting mechanism monitoring control module is used for acquiring voltage data measured by the voltage measuring device, a switching signal of the subway shield door and a closing state signal of an equipotential connecting wire connecting mechanism, and then performing logic determining; when the connecting mechanism of the equipotential connecting wire is disconnected and if the shield door is opened and the potential difference of a steel rail exceeds a setting value, the connecting mechanism is closed, and otherwise, the current state is maintained; when the connecting mechanism of the potential connecting wire is closed and if the shield door is closed, the connecting mechanism is opened, and otherwise, the current state is maintained. With the adoption of the scheme, the device has the advantages that the safety of passengers getting on or off a bus can be ensured; the problem of igniting of the shield door can be solved; the reliability is high.

The invention relates to a waste heat recovery system of an automobile exhaust pipe and a control method of the waste heat recovery system. Combining characteristics of the waste heat recovery system, the waste heat recovery system with high waste heat recovery efficiency is obtained through increasing of a new branch pipe structure and the control method of the waste heat recovery system, reliability and efficiency of energy conversion are improved, and motion frequency of a baffle and a cold source valve is reduced simultaneously. In addition, through increasing of control of cold quantity of the cold source, actual temperature of a catalytic converter cannot be too high, and the problem that sintering agglomerate failure caused by too high temperature of catalyst is solved.

The invention discloses an air conditioning unit and an electronic expansion valve control method. The air conditioning unit comprises a refrigerant circulation loop, a compressor, a condenser, an electronic expansion valve, an evaporator and a controller. The electronic expansion valve control method is configured to obtain first operation parameters, second operation parameters, third operation parameters, evaporator pressure and compressor power in the operation of the air conditioning unit, wherein the first operation parameters are the air suction pressure and the air suction temperature of the compressor, the second operation parameters are the exhaust pressure and the exhaust temperature of the compressor, and the third operation parameters are the condenser pressure and the condenser liquid outlet temperature; and the target opening degree of the electronic expansion valve is determined based on the first operation parameters, the second operation parameters, the third operation parameters, the evaporator pressure and the compressor power; The opening degree of the electronic expansion valve is controlled through the target opening degree, so that the opening degree of the electronic expansion valve is accurately controlled, and lagging actions or frequent actions of the electronic expansion valve are reduced.

The invention discloses a device for improving vacuum of a thermal power generating unit. The device comprises a steam turbine low-pressure cylinder which is equipped with a steam exhaust pipeline; the steam exhaust pipeline is respectively connected with a steam condensing device and an air cooling steam condenser; mixing devices are arranged in the steam exhaust pipeline and a steam distribution pipeline of the air cooling condenser; a condensed water tank and an air pumping device are connected to the lower end of the air cooling condenser; the condensed water tank is connected with a circulating condensed water collecting tank through a condensed water regulating valve; the circulating condensed water collecting box is connected with the air pumping device; the air pumping device is sequentially connected with reverse rankine cycle electric pump refrigerating system through a second cooling water regulating valve and a circulating cooling water pump in a sequence; the circulating condensed water collecting tank is connected with a reverse rankine cycle electric pump refrigerating device through a check valve, a water pump and a demineralized water regulating valve in a sequence; the circulating condensed water collecting tank is connected with the steam condensing device through a circulating water pump; the circulating cooling water pump and a first cooling water regulating valve are connected with the steam condensing device; the condensed water tank is connected with the steam condensing device through the circulating water pump.

The invention provides a method for controlling the gesture of a rearview mirror. The method comprises the following steps of: firstly, when a vehicle starts, acquiring the adjusting angles of the rearview mirror; secondly, making a statistics on the frequencies of the rearview mirror angles in a preset period, judging the frequencies exceeding the preset threshold value and acquiring the rearview mirror angles corresponding to the frequencies; and finally, under the stopped state of the vehicle, controlling the rearview mirror to keep the angles corresponding to the frequencies. By means of the method and system, the technical problems of large abrasion, short service life and the like of the rearview mirror system are solved. According to the method and system disclosed by the invention, frequent flyback action of the rearview mirror angles under the unloaded state of the vehicle is avoided, the reliability of the rearview mirror system is guaranteed, the abrasion of the rearview mirror system is reduced, the cost is saved, and therefore the angle adjustment of the rearview mirror is more humanized.

The invention discloses an equipotential connection device for selectively separating and closing subway screen doors and a control method thereof. The equipotential connection line connects rails and subway screen doors and is provided with a connection mechanism, which is in a normally open state; Obtain the potential difference between the rail and the subway shield door; the connection mechanism monitoring control module obtains the voltage data measured by the voltage measuring device, the switch signal of the subway shield door and the opening and closing state signal of the equipotential connection line connection mechanism, and makes a logical judgment; When the connection mechanism of the equipotential connection line is in the disconnected state, if the shield door is opened and the potential difference between the shield door and the rail exceeds the set value, the connection mechanism will be closed, otherwise the status quo will be maintained; when the connection mechanism of the equipotential connection line is in the closed state , if the screen door is closed, the connection mechanism is disconnected, otherwise the status quo is maintained. This scheme can not only ensure the safety of passengers getting on and off the bus, but also solve problems such as ignition of screen doors, and has high reliability.

The invention relates to an energy-saving control method for an on-load capacitance-adjusting transformer. The energy-saving control method for the on-load capacitance-adjusting transformer comprises the following steps of: (1) acquiring data of a voltage transformer and a current transformer by using a capacitance-adjusting switch control system and calculating a load factor L and a power factor Q of the on-load capacitance-adjusting transformer; (2) calculating the optimum load factor Lmax when a capacitance-adjusting switch is positioned at a large-capacitance gear and the optimum load factor Lmin when the capacitance-adjusting switch is positioned at a small-capacitance gear by a gear-shifting preset value optimization algorithm; (3) calculating delayed gear-shifting preset time t, an elastic coefficient k and an error coefficient b by a delayed gear-shift preset time algorithm; and (4) further adjusting the delayed gear-shifting preset time t, the elastic coefficient k and the error coefficient b of the maximum energy-saving effect of the on-load capacitance-adjusting transformer by an energy-saving strategy selection algorithm so as to realize the dynamic set of a capacitance-adjusting switch action strategy. The energy-saving control method for the on-load capacitance-adjusting transformer has the characteristics of accurate judgment, obvious energy-saving effect, high system reliability and the like and is particularly suitable for distribution network occasions with complicated load conditions.

The invention provides a washing and nursing device for paralyzed patients, which is characterized in that it includes a base device placed on the ground, which includes a lifting slideway and a sewage collection pool; a sliding device installed on a lifting device, which includes a support rod; The device is installed on the base device and is used to adjust the height of the sliding device; the bath lifting mesh is detachably installed on the sliding device and can lift the patient to take a bath; and the washing device is slidably installed on the sliding device for use To wash the patient. The present invention is easy to use, thoroughly cleans the patient's personal hygiene, improves the life quality of the paralyzed patient, reduces the discomfort caused to the patient by moving, and reduces the labor intensity of the nursing staff.

The invention provides a negative pressure optimal control method of a BFG boiler. The negative pressure optimal control method comprises the following steps that a hearth negative pressure setting value is subtracted from a hearth negative pressure measuring value to obtain a hearth negative pressure deviation signal; the hearth negative pressure deviation signal is inputted into a PI controller,the PI controller calculates a PI operation output quantity; an air supply quantity corrected by oxygen amount is multiplied by feedforward gain to obtain an air supply quantity feedforward calculation output quantity; pressure of the blast furnace gas main pipe is multiplied by the feedforward gain to obtain a coal gas quantity feed-forward operation output quantity; the PI operation output quantity is added with the air supply quantity feedforward calculation output quantity and the coal gas quantity feed-forward operation output quantity, and a variable-frequency input quantity of an induced draft fan is obtained; and the output of the induced draft fan is adjusted through the variable-frequency input quantity of the induced draft fan, and then the negative pressure of the hearth is adjusted. According to the negative pressure optimal control method of the BFG boiler, not only can induced wind frequency conversion control be used for carrying out continuous deviation adjustment onthe negative pressure of the hearth in response to an air volume change, also the change of the blast furnace gas quantity can be quickly responded, so that the pressure of the hearth is guaranteed tobe micro-negative pressure, the combustion of the boiler is stabilized, the internal disturbance of the system is inhibited, and the running stability of a generator set is improved.

The invention relates to a wind turbine generator pitch angle control method which comprises the following steps: establishing an ELM based effective wind speed estimation model; obtaining effective wind speed information and corresponding output data within a period of time to train the effective wind speed estimation model; obtaining a feedback control signal: establishing a wind turbine generator digital model; defining an adjusting error, solving dynamic characteristics and a preliminary expression of a feedback control signal; estimating uncertainty and interference term of the mathematical model of the wind turbine generator; carrying out conversion treatment on the preliminary expression to obtain the feedback control signal; obtaining a feedforward control signal: and obtaining thepitch angle signal in the effective wind speed information and the unit corresponding output data within a period of time, and training the wind turbine generator dynamic nonlinear wind speed-pitch angle relation model, wherein the model can give the feedforward control signal on line in real time. With adoption of the wind turbine generator pitch angle control method, the situations that the load optimization effect of the traditional pitch angle controller is poor caused by inaccurate feedforward pitch angle information and the calculation is complicated caused by a unit linear model are avoided.

The invention discloses a device for improving the vacuum of a thermal power unit, comprising a steam turbine low-pressure cylinder, the steam turbine low-pressure cylinder is provided with an exhaust pipe, the exhaust pipe is respectively connected with a steam condensing device and an air-cooled condenser, and the exhaust pipe is connected with the air-cooled condenser There is a mixing device in the steam distribution pipe of the air-cooled condenser. The lower end of the air-cooled condenser is connected to a condensate tank and an air extraction device. The condensate tank is connected to a circulating condensate header through a condensate regulating valve. The air extraction device is connected to the reverse Rankine cycle electric pump refrigeration system through the cooling water regulating valve 2 and the circulating cooling water pump in turn. The circulating electric pump refrigeration device is connected, the circulating condensate collection tank is connected with the steam condensing device through the circulating water pump, the circulating cooling water pump and the cooling water regulating valve are connected with the steam condensing device, and the condensed water tank is connected with the steam condensing device through the circulating water pump.