41results about How to "Avoid start and stop" patented technology

The invention discloses a multiple online control method and system. The method comprises the steps that the set temperature and the indoor environment temperature of each indoor unit are obtained, and the temperature difference is calculated; the comprehensive temperature difference is calculated; a refrigeration modification value ETS/a heating modification value CTS is calculated according to the comprehensive temperature difference; and the evaporation temperature/condensation temperature is modified, and the frequency of each compressor is adjusted. According to the multiple online control method, the frequency of each compressor is adjusted according to the modified evaporation temperature/refrigeration temperature, energy is saved, and meanwhile the refrigerating/heating effect of each indoor unit can be guaranteed. When the requirement for each indoor unit is low, the frequency of the corresponding compressor is reduced, the corresponding compressor runs at the low frequency and is kept running with the low output in a low energy consumption manner, the corresponding compressor is protected against start stop, and accordingly power rise caused by start stop of the corresponding compressor is avoided. Meanwhile, the indoor units continuously run, so that the indoor temperature is maintained near the set temperature, the constant indoor temperature is achieved, a good refrigerating/heating effect is guaranteed, and the comfort degree is improved.

The invention relates to a method for controlling a wind generating set under strong wind, which comprises the following steps of: A, monitoring the state of the generating set, executing a step B when a fan runs normally, and stopping the generating set when the fan fails; B, monitoring the wind speed, stopping the generating set when the wind speed is greater than a maximum running wind speed, and executing the step A when the wind speed is less than or equal to a cut-out wind speed, otherwise, executing a step C; and C, reducing power output. The invention provides a safe and efficient control mode; based on a normal wind generator control strategy, a concept of strong wind control curve is introduced so that the wind generating set still runs normally under a high wind speed working condition and is combined to the grid while reducing the wind load influence; and the method improves the utilization rate and power generation quantity on the premise of ensuring the safety of the fan, meanwhile eliminates a parameter of restarting wind speed, avoids redundant start-stop processes, and prolongs the service life of the fan.

The invention discloses a temporary obstacle handling method for laser slam navigation, which is applicable to the factory environment. The temporary obstacle handling method is characterized by comprising the steps of: S1, importing a positioned static map into an AGV, and using the static map as a background map of an alarm map; S2, displaying an occupied area and an expanded area of a fixed obstacle on the alarm map; S3, setting two-level alarm areas including a first-level alarm area and a second-level alarm area; S4, detecting an obstacle by means of a laser scanner, judging whether the obstacle is a fixed obstacle or a temporary obstacle based on the detection result, and displaying the temporary obstacle detected by the laser scanner on the alarm map; S5, detecting whether the AGV is positioned in a human-computer interaction area or an AGV exclusive area, carrying out no operation on the temporary obstacle when the AGV is positioned in the human-computer interaction area, and executing a step S6 when AGV is positioned in the AGV exclusive area; S6, and selectively performing speed reduction, stopping or running at an original speed by the AGV based on the judgment result ofthe step S4.

The invention relates to a decision-making method for optimizing thermal power unit combination under complementation of wind power and an energy storage system. The decision-making method comprises a process of optimizing an upper layer problem and a lower layer problem, wherein the upper layer problem builds upper layer problem constraint conditions by taking minimization of the operating cost of a thermal power unit within a set period as an objective function; the lower layer problem builds lower layer problem constraint conditions by taking maximization of profit acquired by the energy storage system in performing space-time translation and backup supply on electric energy in a power grid as an objective function; and a solution is acquired by using a mode of alternative iteration of the upper layer problem and the lower layer problem. The energy storage system in the model not only can participate in an expected power balance constraint, but also can play a role of backup through complementation with the wind power, and has an ability of directly eliminating the uncertainty; frequent startup and shutdown of the thermal power unit is avoided on the basis of improving the uncertainty acceptance ability; and a regulating effect of the frequency of an electric power system is considered in decision making, so that the decision is enabled to be free from conservation and more conform to the reality.

The invention relates to automatic magnetic roller paint spraying equipment. The equipment consists of a base, a water screen spraying cabinet, a magnetic roller power transmission system, a spray gun moving device and an electrical appliance control cabinet, wherein the water screen spraying cabinet is a cabinet body of which the right side is provided with an opening; the inner wall of the cabinet body is used as a water screen plate; the cabinet body and the base enclose a water tank; water flow outflowing from a water pump arranged above the cabinet body forms a water screen to adsorb sprayed paint; the electrical appliance control cabinet abuts against the spray gun moving device and is arranged in parallel on the outer side of the water screen plate to control the operation of the equipment; in the magnetic roller power transmission system, power is outputted by a motor, and two rotating shafts are driven to rotate in the same direction through the meshing transmission of a gear so as to realize the rotation of a magnetic roller; and in the spray gun moving device, the power is outputted by a servo motor, and a lead screw is driven to rotate by a coupler, so that a spraying gun fixed on a lead screw nut block moves right and left. In the automatic paint spraying equipment, the motor does not need stopping in the process of replacing the magnetic roller, so that the automatic magnetic roller paint spraying equipment has a simple structure, is convenient to operate, has reliable spraying performance, and improves the efficiency greatly.

The invention discloses a miniature hydraulic drive system used for an ankle joint artificial limb. The miniature hydraulic drive system comprises an electromotor, a hydraulic pump, a first check valve, a second check valve, a first energy accumulator, a second energy accumulator, a first normally-opened switching valve, a second normally-opened switching valve, a first normally-closed switching valve, a second normally-closed switching valve and a double-ejection-rod hydraulic cylinder. In the miniature hydraulic drive system, by means of unceasing work of the motor and energy storage of the energy accumulators, the requirement for the peak power of the motor can be reduced; and the power consumption is lowered during long-term walking so that the cruising ability can be improved. In the miniature hydraulic drive system, the direct-current motor and the hydraulic pump unceasingly work in the whole movement process, the energy utilization efficiency of the system is improved, frequent start, stop and reversing of the motor are avoided, and therefore the usability of the motor is improved, and the service life of the motor is prolonged.

The invention discloses a refrigerator and a refrigerating chamber defrosting control method therefor. The method includes the steps: calculating accumulative refrigerating time of a refrigerating chamber of the refrigerator; performing auxiliary defrosting of the refrigerating chamber when the accumulative refrigerating time reaches a first preset time which is 5 hours to 10 hours; ending the auxiliary defrosting when the temperature of an evaporator is larger than or equal to a first preset temperature which is 4 DEG C to 6 DEG C. The refrigerating chamber defrosting control method for the refrigerator according to the embodiment is effective in defrosting and allows a water guide channel of the refrigerator to rarely ice.

An air conditioner has an outdoor set with compressor, an indoor set with fan, heat exchanger, room temp sensor and heater controlled by controller, a controller, and a temp setting-up unit. Its control method features that when the air conditioner is running in heating mode and the sensed indoor temp is higher than the temp setting by a certain value, the compressor is stopped and the heater is turned on.

The invention relates to a whole network distributed heat storage and supply system and method and belongs to the field of heat storage and supply systems. The whole network distributed heat storage and supply system is characterized by comprising a heat supply system, a heat storage system, a control system and a management and control platform, wherein the heat supply system is connected to theheat storage system, and the control system is separately connected to the heat supply system, the heat storage system and the management and control platform; the heat storage system includes a heatstorage tank, an electric shut-off valve, an electric regulating valve and a circulating water pump, wherein a cold water end and hot water end of the heat storage tank are separately connected to theheat supply system through the electric shut-off valve, the electric regulating valve and a circulating water pump. The whole network distributed heat storage and supply system and method have the advantages that novel heating systems of heat storage devices are installed on positions such as users' houses, heat exchange stations, pipe networks, renewable energy source areas, thermal power plantsand regional boiler rooms, and through the mode of combining user sides, pipe network sides and heat source sides for heat storage, not only are the needs of heat sources for peak shaving met, but also the advantages of being narrow in adjustment range, closer to the users, higher in flexibility and the like are achieved.

The working principle of a semiconductor thermoelectric air-conditioning and water-heating device is that when one portion of electric energy is input, 1.5 portions of cold energy is generated on a refrigerating end face of a semiconductor thermoelectric element, and indoor return air, which is driven by a draft fan to flow downwardly and passes through vertical air side fins, is cooled by the cold energy through the vertical air side fins, so that an air-conditioning function is achieved; according to the energy conservation law, 2.5 portions of heat is generated on a heating end face of the semiconductor thermoelectric element, and water, which is driven by the siphon effect to flow upwardly and passes through the side wall of a hot water tank and vertical hot water side fins, is heated by the heat energy through the side wall of the hot water tank and the vertical hot water side fins, and the heated water is insulated by a thermal insulation material at the outer side of the hot water tank; while the device is in use, cold water enters the hot water tank from a water inlet, and after the cold water is heated, hot water flows out of the hot water tank from a water outlet, so that a water-heating function is achieved. The energy efficiency ratio of air conditioning to water heating reaches up to 4.

The invention discloses a pressure maintaining system adopting variable-frequency pressure maintaining equipment and a self-adaptive control method. The system comprises a pressure container, a non-pressure container and pressure maintaining equipment; and the pressure container is connected with the non-pressure container through pressure maintaining equipment. The pressure container is provided with a sensor. The sensor and the pressure maintaining equipment are both connected with a controller, and the controller is connected with a man-machine interaction device. The invention aims to solve problems that the consumption load is not matched with the output power of the pressure maintaining equipment, the pressure maintaining equipment is frequently started, stopped or loaded and unloaded, the abrasion consumption of equipment original parts is aggravated, the service life of the pressure maintaining equipment is influenced, energy loss is caused, and the system energy efficiency and economy are influenced.

The invention belongs to the technical field of metal plate strip heat treatment equipment and discloses a metal plate strip rolling quenching speed control system and method. The control system is composed of high pressure zone and low pressure zone roller driving systems. The high pressure zone, low pressure zone and high-low pressure zone speed control methods are used according to different quenching cooling stages of a plate strip. The system and method realize a combined control strategy of a complex speed, an accelerated speed, forward and reverse rotation, starting and stopping of a roller of a roller quenching machine, has a high control precision, good synchronism and a low failure rate, and can meet complicated heat treatment demands of different types and different specifications of metal plate strips, and significantly improves the shape, uniformity and surface quality of the quenched and cooled plate strip.

The invention discloses a household electrical appliance switch which comprises a base, a fixed hole, pressing plates, a fluorescent plate, a first switch, a second switch, a position limiting hole, sockets, a mounting box, a protection plate, a boss, a connecting column, sliding columns, a slot, an inserting column and a toggle buckle. The beneficial effects of the present invention are as follows: through the arrangement of sets of pressing plates on the base and the sliding columns at the bottoms of the pressing plates, the pressing plates can be detached from the base. The arrangement of the protection plate inside the base and the sockets inside the protection plate means that the pressing plates are removable in the daily use. The use of the internal sockets solves the problem of insufficient number of sockets and protects the sockets from being damaged. When the pressing plates are removed, the first switch and the second switch at both ends of the base can control the opening and closing of the household electrical appliances. The device is easy to use, can control the start and stop electrical appliances, and can also solve the inconvenience with the sockets to use electricity. According to the different electrical appliances at home, sockets of different specifications can be replaced, making the sockets more diverse.

The invention provides a temperature control device and method of a series compensation device control protection system. The device comprises an acquisition module, a processing module and an adjusting module which are connected in sequence; the acquisition module converts the acquired actual temperature of the control protection system into a differential signal of a high voltage level; the processing module is used for calculating the operating temperature of the control protection system; and the adjusting module is used for adjusting the actual temperature of the control protection system. The actual temperature can be adjusted on the basis of the calculated operating temperature, the automation degree is high, and the control protection system and a draught fan cannot be damaged; andcollection of the overall temperature of a case is achieved by arranging a plurality of temperature sensors, safe and stable operation of the control protection device and the measurement and controldevice is guaranteed, damage caused by too high temperature is avoided, in addition, the operation temperature of the control protection system can be displayed and stored, and convenience is provided for maintenance of the control protection system.

The invention discloses a unit commitment method considering demand utility. The method comprises the following steps: constructing a target function for unit combination, and constructing a unit combination model; establishing constraint conditions for the unit combination model; solving the unit combination model according to constraint conditions; and obtaining the total generating capacity ofeach unit combination and the total electricity consumption of each user, wherein the target function is obtained by subtracting a power generation cost function from the sum of all user utility functions.

The invention relates to the technical field of aluminum alloy cast rolling, in particular to a method for controlling the temperature of molten aluminum in an aluminum alloy cast rolling holding furnace, which is used for accurately controlling the temperature of furnace gas in an electric heating holding furnace and keeping the temperature of the molten aluminum in the furnace within a process requirement range and comprises the following steps of: measuring the height of the molten aluminum in the holding furnace; setting the heating power of the holding furnace; adjusting the heating power of the holding furnace. According to the method, the temperature of the molten aluminum in the holding furnace is stably controlled by adjusting the heating power of the holding furnace and continuously controlling the temperature of the furnace gas, the method is simple, convenient and feasible, the effect is obvious, the problem of overburning of the molten aluminum can be controlled to a great extent, and energy waste and production cost are reduced while the internal quality of cast-rolled products is improved.