123results about How to "Reduce the frequency of start and stop" patented technology

The invention discloses a constant volume type accurate automatic liquid replenishing device. The device comprises a liquid storage tank, a mechanical liquid replenishing pump, a sizing tank, an upper liquid level sensor, a lower liquid level sensor, a floating ball, a U-shaped floating ball rod, a constant volume sensor, a ruler, an electromagnetic directional valve, a cleaning groove and a control system, wherein the inner side wall of the sizing tank is provided with the upper liquid level sensor and the lower liquid level sensor; the primary liquid replenishing volume can be acquired through the diameter of the sizing tank and the drop distance of the floating ball; the drop distance of the floating ball is controlled by the constant volume sensor; the electromagnetic directional valve is opened during liquid replenishing; after the constant volume sensor drops for a predetermined distance, a signal is transmitted to the control system by the constant volume sensor and the electromagnetic directional valve is immediately closed, so that the liquid can be accurately replenished in the cleaning groove, the concentration of a solution in the cleaning groove is kept stable, and the cleaning quality of a silicon slice is substantially guaranteed.

The invention discloses an efficiency optimization control method of a fuel cell array system for a tramcar. The efficiency optimization control method comprises an off-line calculation process and anonline control process, wherein the off-line calculation process comprises the following steps: an efficiency curve of a single fuel cell array under different output powers is acquired through an off-line data collection module, and a function of efficiency varying with the output powers is obtained through an efficiency curve fitting module, which is efficiency for optimizing the parallel use of the fuel cell array; then the turning power when the fuel cell array is used in parallel is obtained through a turning power calculation module; the online control process comprises the following steps: the output current and the busbar voltage of each branch are obtained through a data acquisition module, an output power value required for each fuel cell branch is obtained through a power distribution module, then the corresponding control quantity is obtained according to the obtained output power value and in combination a control quantity calculation module, and finally, a correspondingimpulse signal is obtained through a PWM (Pulse-Width Modulation) module, so that the control on the fuel cell array system is completed, and the system efficiency is optimized.

The invention is applicable to the air conditioner technical field and provides a method and system for controlling the operation of a constant-frequency air conditioner for a base station and the constant-frequency air conditioner for a base station. The method comprises the following steps: detecting the current indoor temperature, and when the current indoor temperature is higher than a preset temperature and reaches the upper limit of the control accuracy of the preset temperature, controlling a starting compressor to start refrigeration, wherein the upper limit is more than 1 DEG C and can be set to be more than 3-6 DEG C through programming. The temperature control range for the operation of the compressor is wider compared with the prior art, thus reducing the start-stop frequency of the compressor; the lower limit of the control accuracy of the preset temperature is equal to 0 DEG C, the air conditioner stops when reaching the preset temperature, when the lower limit is increased too, the operation temperature of the compressor is increased so that the compressor exhausts less power and further reaches the effect of energy-saving, compared with the prior art; and the preset temperature can also be increased to reduce the power consumption of the compressor and further satisfy the aim of energy-saving.

The invention discloses a refrigeration control method for an inverter refrigerator. The target operation frequency of a compressor is calculated in real time through a control system with the goal that when the temperature of one refrigeration chamber naturally rises to a corresponding start-up temperature, the temperature of the other refrigeration chamber is a corresponding shutdown temperature Toff1, and operation of the compressor is adjusted with the target operation frequency obtained through real-time calculation until any one of the conditions that the refrigerated refrigeration chamber reaches the corresponding shutdown temperature and the refrigeration chamber with temperature rising reaches the corresponding start-up temperature happens. The invention further discloses a refrigeration control device for the inverter refrigerator and the inverter refrigerator. By means of the refrigeration control method for the inverter refrigerator, the real-time temperatures of the two refrigeration chambers can be kept in the respective corresponding constant-temperature regions, the compressor can be kept to operate with the low operation frequency, the starting and stopping frequency of the compressor is lowered to the maximum limit, and therefore the service life of the compressor is effectively prolonged, and noise caused by frequent starting of the compressor is effectively reduced.

The invention provides a defrosting control method and system of a heat pump air-conditioning unit. The defrosting control method is used for defrosting multiple pipeline systems of the air-conditioning unit and comprises the following steps: whether pipeline systems meeting defrosting requirements exist is detected, if yes, the quantity of the pipeline systems meeting the defrosting requirements is detected; whether the percentage of the quantity of the pipeline systems meeting the defrosting requirements in the total quantity of the pipeline systems is larger than a preset percentage or not is determined; if yes, the pipeline systems meeting the defrosting requirements are sorted according to total run time of corresponding compressors; and a preset quantity of pipeline systems in the pipeline systems meeting the defrosting requirements are in a defrosting mode, and other pipeline systems are in a heating mode. According to the defrosting control method and system, in the defrosting process, part of the pipeline systems defrost, the other pipeline systems perform heating, so that heating continuity for users is guaranteed, the use comfort of the users is improved, the heating pipeline systems provide heat for the defrosting pipeline systems, and the defrosting efficiency is increased.

The invention discloses a constant-speed air conditioner comprising an indoor unit, an outdoor unit, a controller, an indoor temperature sensor, a liquid storage tank, a first electromagnetic valve and a second electromagnetic valve. The indoor temperature controller, the first electromagnetic valve and the second electromagnetic valve are electrically connected with the controller. The controller is used for determining the operation mode of the constant-speed air conditioner according to indoor temperature data sent by the indoor temperature sensor and calculating the indoor temperature change rate; and the controller is also used for comparing the temperature change rate with a preset threshold value, correspondingly controlling the first electromagnetic valve and the second electromagnetic valve according to the comparison result and the operation mode, thereby adjusting the refrigerant circulation amount in the constant-speed air conditioner. The invention further discloses a control method of the constant-speed air conditioner and a computer readable storage medium. By the adoption of the constant-speed air conditioner, the control method of the constant-speed air conditioner and the computer readable storage medium, the refrigerant circulation amount in the constant-speed air conditioner can be controlled, so that it is avoided that the indoor temperature fluctuates severely, and then the use comfort of the air conditioner is improved.

The invention provides a permanent magnet generator temperature control system. The permanent magnet generator temperature control system comprises a temperature sensor, a signal amplifier, an analog/digital (A/D) switching circuit, a main control central processing unit (CPU), a digital/analog (D/A) switching circuit, a drive circuit and an actuator. The temperature sensor is arranged on the surface of a permanent magnet of a permanent magnet generator and connected with the signal amplifier, the signal amplifier is connected with the A/D switching circuit, the A/D switching circuit is connected with the main control CPU, the main control CPU is connected with the D/A switching circuit, the D/A switching circuit is connected with the drive circuit, and the driver circuit is connected with the actuator. The actuator comprises a variable pitch motor, a converter and a generator cooling fan. The permanent magnet generator temperature control system is used for temperature control of the permanent magnet generator.

The invention discloses an air source heat pump floor heating system which comprises a circulating water module, an air source heat pump, a heating water tank, a tail end floor heating module, a water pump, an electric heating module, an electromagnetic valve, an expansion tank, a temperature sensor and a controller. An inlet of the circulating water module is connected with the expansion tank, the expansion tank is connected with an inlet of the water pump, an outlet of the water pump is connected with an inlet of the air source heat pump, and an outlet of the air source heat pump is connected with an inlet of the heating water tank. According to the air source heat pump floor heating system, the frequency of the adopted water pump can be automatically adjusted according to the probability of indoor opening, the main engine starting and stopping frequency caused in the circumstance of the large heating capacity of an indoor low load device can be easily reduced, the speed of decreasing of the overall water temperature can be reduced in a defrosting mode, the floor can be heated more rapidly in the primary heating period of a floor heating system, waiting time of users is shortened, and the pressure of the system cannot be reduced in the circumstance that outside water pressure is insufficient.

The invention discloses a fixed-frequency air conditioner control method. The method comprises the steps of (1) acquiring a current indoor temperature and a current indoor coil pipe temperature during operating of an air conditioner, and comparing the current indoor temperature with a current set temperature; (2) comparing the current indoor coil pipe temperature with a current coil pipe target temperature if the comparison result of the current indoor temperature and the current set temperature meets the condition of operation stopping of a compressor at the indoor temperature; (3) determining the current coil pipe target temperature according to the current set temperature; (4) controlling the compressor to stop operating if the comparison result of the current indoor coil pipe temperature and the current coil pipe target temperature meets the condition of operation stopping of the compressor at the coil pipe temperature; and (5) otherwise, controlling the compressor to continue operating. By means of the fixed-frequency air conditioner control method, fluctuation of indoor temperature can be reduced by reducing the start-stop frequency of the compressor, and the comfort performance of the fixed-frequency air conditioner is improved.

A pneumatic pump control device comprises an air supply pipeline (1) and a control pipeline (7), wherein the air supply pipeline (1) and the control pipeline (7) are connected in parallel. The air supply pipeline (1) is provided with an air supply pneumatic control valve (3). An outlet of the control pipeline (7) is communicated with a control air inlet of the air supply pneumatic control valve (3). A liquid level control pipeline communicated with a water storage pool (16) is arranged on the control pipeline (7). The liquid level control pipeline comprises a low-liquid-level pneumatic control pipeline body and a high-liquid-level pneumatic control pipeline body. When the liquid level reaches a high liquid level, the high-liquid-level pneumatic control pipeline body and the low-liquid-level pneumatic control pipeline body are closed at the same time, and the air supply pneumatic control valve (3) is opened; when the liquid level reaches a low liquid level, the high-liquid-level pneumatic control pipeline body and the low-liquid-level pneumatic control pipeline body are used for exhausting air at the same time, and the air supply pneumatic control valve (3) is closed. Compressed air of a pneumatic pump is used as a power source of the control pipeline, operation is safe and reliable, and maintenance is not needed. The service life of the pneumatic pump control device is prolonged, and air sources are saved.

The invention provides a water pump control method based on a pressure sensor. According to the control method, a water pump is started to rise pressure, operation pressure of the water pump is continuously read, and stop pressure of the water pump is automatically set; the stop pressure of the water pump does not need to be manually set by a user, so that degree of automation is improved, accuracy for setting the stop pressure of the water pump is improved, and start-stop frequency of the water pump can be reduced. The invention further provides a control method for automatically setting start pressure of the water pump, so that automatic control degree of the water pump is further improved, and user operation is reduced. Besides, the invention discloses a controller using the water pump control method based on the pressure sensor, and the controller is used for controlling the water pump.

The invention discloses a gas filling system of a gas storage bottle. The gas filling system comprises a gas storage tank body, a three-way valve, a manually adjusted pressure reducer, a filter, a gas storage bottle and a cooler, wherein three connecting openings of the three-way valve are respectively connected with the gas storage tank body, the manually adjusted pressure reducer and the filter; the filter is connected with the gas storage bottle; the manually adjusted reducing device is connected with a vacuum pump device; a pressure meter is arranged at an outlet of the vacuum pump device. The gas filling system of the gas storage bottle can be used for filling a hydrogen storage bottle, and is also suitable for filling a natural gas bottle; after gas in the gas storage bottle is used up, the gas storage bottle can be repeatedly filled and used.

The invention relates to a control method of a device in a hydrogen-natural gas filling station, in particular to an automatic control method of a device in a hydrogen-natural gas filling station. The invention solves the problems of frequent starting and stopping of equipment and influenced working efficiency of the equipment of the traditional control method of the hydrogen-natural gas filling station device. The automatic control method of the hydrogen-natural gas filling station device comprises the following steps of: 1, setting three storage tanks on a hydrogen-natural gas filling station, respectively charging gas into the three storage tanks; 2, in a process of operating the hydrogen-natural gas filling station, using the storage tank with a highest pressure as a high-pressure storage tank; 3, charging gas to a vehicle-mounted cylinder of a vehicle through a low-pressure storage tank, charging gas to the vehicle-mounted cylinder of the vehicle through a medium-pressure storage tank; and when the pressure of the low-pressure storage tank is lower than half of a rated pressure of the low-pressure storage tank, charging gas to the low-pressure storage tank. The invention is suitable for carrying out automatic control on the device of the hydrogen-natural gas filling station device.

The invention discloses a temperature control method and a device for a brushless DC motor driver. The temperature control method for the brushless DC motor driver comprises steps: a temperature sensor acquires the temperature of a detected power device; when the acquired temperature of the detected power device is in a preset temperature range, a corresponding rotation speed adjustment amount is acquired according to the temperature of the power device; and according to the rotation speed adjustment amount, the operating speed of the brushless DC motor is adjusted, and the brushless DC motor is controlled to operate according to the adjusted speed. The technical scheme of the invention can improve the reliability of the brushless DC motor system.

The invention provides a constant-pressure water supply device and aims to overcome the defects that when instant large-flow water use occurs at a water use terminal in a system with long or thin pipelines, water pressure signals fed back to a controller is evidently delayed, pressure fluctuation is generated, frequent on and off of a water-supply water pump in a short time occurs and the problems cannot be solved by a capsule type air pressure tank of a conventional water supply system. According to the technical scheme, a cavity with pressure stabilizing and water storing functions is designed, the cavity is communicated with a water supply pipe network and the water use terminal through a water inlet and a water outlet respectively, a check valve is arranged between the water inlet and the water supply pipe network, and the water in the pressure-stabilizing cavity can keep constant pressure through a counterweight structure. When the instant water use occurs at the water use terminal, stable-pressure water supply can be achieved by the cavity while severe fluctuation of the pressure at the water inlet end can be avoided by the cavity, and the pressure fluctuation of the water supply pipe network is eliminated.

The invention belongs to the technical field of energy supply, and particularly relates to a gas supply system, a gas supply method and a hydrogen refueling station. The gas supply system comprises a gas unloading system, a compressor, a hydrogen storage tank, a filling system and a control system, wherein the gas unloading system is used for transferring hydrogen in gas source equipment to the compressor; the compressor is used for pressurizing the hydrogen and then filling the hydrogen into the gas storage tank; the filling system is used for filling the hydrogen in the gas storage tank into hydrogen filling equipment; the control system is used for monitoring the hydrogen pressure in the hydrogen filling equipment, the hydrogen pressure in the gas storage tank and the hydrogen pressure in the gas source equipment, and is also used for controlling the startup and shutdown of the gas unloading system, the compressor and the filling system; the gas supply system is modularly arranged; or the gas unloading system, the compressor, the hydrogen storage tank, the filling system and the control system are arranged in at least one skid-mounted box. The gas supply system can be flexibly arranged, the occupied area is reduced, and popularization and application of the hydrogen refueling station are promoted.

The invention discloses a vehicle SOC adaptive energy management method based on ECMS, and the method comprises the steps: S100, obtaining an optimal oil-electricity conversion equivalent factor initial value s through employing an iterative targeting method based on the current parameters of a vehicle and a preset driving cycle; S200, correcting the initial value s of the optimal oil-electricityconversion equivalent factor according to the current SOC of the vehicle to obtain a corrected optimal oil-electricity conversion equivalent factor s (t); S300, on the basis of the corrected optimal oil-electricity conversion equivalent factor s (t), respectively calculating the minimum equivalent energy consumption of a pure electric driving mode, a series driving mode and a parallel driving modeunder the current driver demand torque; and S400, on the basis of the minimum equivalent energy consumption calculation result and the vehicle state parameters, selecting a target operation mode of the vehicle. By the adoption of the vehicle SOC self-adaptive energy management method based on the ECMS, the starting and stopping frequency of an engine can be obviously reduced, so that oil consumption is effectively reduced, fuel oil is saved, and the economical efficiency and NVH performance of a vehicle are improved.

The invention relates to an intelligent temperature control system and method for home heating. The control system comprises a single chip microcomputer, a keyboard input module, a display module, a communication module, a temperature collecting module and a driving module, wherein the keyboard input module, the display module, the communication module, the temperature collecting module and the driving module are connected with the single chip microcomputer; and the single chip microcomputer comprise a multi-level heating module, an operating mode selection module, a remote control module, a heating ping-pong effect solving module and a system protection module, and is used for realizing of judgment, treatment and output of all control logic of the control system. According to the invention, the temperature is set through remote control, so that the operation is more flexible; a three-level heating mode is adopted, so that the start-stop frequency of equipment is reduced, and the service life of the equipment is prolonged; and two operating modes are designed, so that energy is saved, and pipeline frost-cracking, equipment damage and the like are avoided. Therefore, the intelligent temperature control system and method provided by the invention have extensive practical application values.

The invention provides a power distribution method and system for a wind power cluster. The method comprises the following steps that: based on the grid-level dispatching instruction, the optimal windpower output of the wind farm cluster layer is determined by utilizing the preset active power coordinated distribution strategy; Based on the optimal wind power output of wind farm cluster layer, the optimal wind power output of sub-field layer is determined by using the pre-determined active power coordinated distribution strategy. Based on the optimal wind power output of the sub-field layer,the operation of the wind turbine control terminal in the unit layer is controlled. The active power output hierarchical distribution method of the invention combines the hierarchical thought of the large-scale system and considers the coordination and cooperation between different wind farms in the same area at the level of the wind power cluster, further realizes the relative minimization of thesystem network loss and improves the wind power consumption capacity at the same time.

The invention discloses a heat storage type domestic central air-conditioning, heat supply and water heating three-purpose machine. The heat storage type domestic central air-conditioning, heat supplyand water heating three-purpose machine comprises a refrigerant, heat supply/air conditioning water circulation and control system, and is characterized by further comprising a domestic hot water heat exchanging and heat storing machine; the domestic hot water heat exchanging and heat storing machine consists of a preceding-stage water heat exchanger, a hot water tank and a domestic hot water heat exchange tube; a refrigerant circulation system comprises a loop which is formed by sequential connection of a compressor, the preceding-stage water heat exchanger, a four-way valve, a water heat exchanger, a throttling valve, an outdoor air heat exchanger, a four-way valve, an air and liquid separator and a compressor; a heat supply/air conditioning water circulation system comprises a loop formed by sequential connection of a circulating water pump, a water access of the water heat exchanger, a coil tube fan and a dual-purpose water tank; a loop for generating domestic hot water by using aheat pump in spring and autumn consists of a circulating water pump, a water access of the water heat exchanger, a hot water tank and a dual-purpose water tank which are connected in sequence; the hot water tank is used for storing heat and supplying domestic hot water; and the heat exchange amount of the preceding-stage water heat exchanger is smaller than 1/5 of that of the water heat exchanger. The three-purpose machine disclosed by the invention has the functions of supplying head, conditioning air and supplying domestic hot water in four seasons, is extremely simple in both structure andcontrol, is high in efficiency and saves energy.

The invention relates to a pot/bottle beverage rapid cooling machine. The rapid cooling machine comprises an outer shell, and a cooling container used for containing cooling liquid and used for cooling pot/bottle beverage and a gripping device used for gripping the pot/bottle beverage are arranged in the outer shell; the rapid cooling machine is further provided with a lifting device for driving the gripping device to move up and down, and the lifting device drives the gripping device to grip the pot/bottle beverage to move between the position above the liquid level and the position below the liquid level of the cooling liquid of the cooling container; and at least a part of the gripping device is located above the cooling container. When being above the liquid level, the pot/bottle beverage is taken and placed; when being below the liquid level, the pot/bottle beverage is cooled, and taking and placing are convenient; and the cooling liquid can be repeatedly used, automation operation is achieved, and a user only needs to place the pot/bottle beverage needing to be cooled into the rapid cooling machine. The lifting device is a balance counterpoise traction device, the smaller traction force can drive the gripping device to be lifted, and the needed traction force is greatly reduced, and the energy consumption is reduced.

The invention discloses a liquid level control device for a percolate inclined pipe collecting well of a refuse landfill, and belongs to the field of percolate collecting wells of refuse landfills. The liquid level control device includes a refuse landfill, an inclined pipe, a percolate collecting well, a submersible pump, a static pressure type liquid level detector, and a submersible pump control box; the percolate collecting well is arranged above the refuse landfill; the inclined pipe communicates the bottom of the percolate collecting well and the inner part of the refuse landfill; the submersible pump and a detection probe of the static pressure type liquid level detector are arranged on the bottom of the inclined pipe; the static pressure type liquid level detector is connected to the detection probe of the static pressure type liquid level detector; and the submersible pump control box is connected to the submersible pump. The submersible pump and the detection probe are arranged on the bottom of the inclined pipe, which can discharge water gathered in the percolate collecting well and the inclined pipe, and in this way, the water content of biogas generated in the refuse landfill is low, and the power generation efficiency of a back-end biogas power generation system can be improved; and meanwhile, the start-stop frequency of the submersible pump is greatly decreased, and the service life of the submersible pump is prolonged.

The invention discloses a rapid cooling method and a rapid cooling machine for bottled/canned liquid. A bottle/can containing liquid makes contact with low-temperature cooling liquid for heat exchange, the liquid in the bottle/can is rapidly cooled, the low-temperature cooling liquid is sprayed to the outer surface of the bottle/can, the low-temperature cooling liquid at least provides one force in the tangential direction of the bottle/can, and the bottle/can can rotate around the axis of the bottle/can. According to the rapid cooling method and the rapid cooling machine for the bottled/canned liquid, a spraying manner is adopted for utilizing the fluid pressure of the cooling liquid, the power for self rotation is provided for the bottle/can, a driving mechanism is ingeniously simplified, and therefore water and electricity separation of the rapid cooling machine is smoothly achieved, safety of the product is improved, and the equipment cost can be greatly reduced as well.