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 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 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 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 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 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.