3368 results about "Central air conditioning" patented technology

The invention provides a method for controlling a global optimization of energy saving for a central air conditioning system based on a model, comprising a control module, a multichannel data acquisition card and control card, a refrigerating unit data collector and a controller, a humidity sensor, a temperature sensor, a flow sensor, a watt transducer, a water pump frequency converter, a fan frequency converter, an RS232 / RS485 conversion module and a RS485 / RS232 conversion module. The whole system can be operated under the condition of most energy saving according to an operating condition of optimized energy saving of each energy consumption device acquired by calculation of a calculation module by taking energy consumption modules of a refrigerating unit, a water pump and a fan and an ARMA air conditioning load forecasting model. The invention thoroughly concerns an influence of the operating condition of each power device in the system to the energy consumption of the whole system, takes a control strategy based on a forecasted air conditioning load, and performs an online update for the energy consumption modules of key energy consumption devices in the system, thereby greatly improving an effect of optimization of energy saving for the central air conditioning system.

An air conditioning apparatus comprises an air-conditioning unit including at least a cooling coil as a heat exchanger, a blower, a chiller, and a coolant pump for conducting air-conditioning, wherein the coolant pump pumps the coolant cooled by the chiller to the cooling coil, the cooling coil cools the air through heat exchange of the coolant and the air, the blower supplies the cooled air into a room. Coolant temperature of the chiller, the coolant flow rate of the coolant pump, and the air flow rate of the blower are calculated in accordance with the set points of the indoor temperature and the indoor humidity, and the chiller, coolant pump, and blower are controlled on the basis of the arithmetic calculation results. Thereby, the indoor temperature and indoor humidity are independently controlled in the central air-conditioning system.

This invention relates to an energy-saving central air conditioning system, which comprises cold and hot water source host, terminal device and the control system to adjust and monitor. The said control system processes according to the large amount of data collected to get the needed optimized status operation orders. It real-time adjusts the each part load of the system into cold storage or cold discharging modes and the said host works under the mode of cold storage and stops working in cold discharging mode.

A house air conditioning system that operates with outside air. The air conditioning system closes the house and uses air conditioning, when the outside temperature is lower than the inside house air temperature the air conditioning system is turned off, the house or building is opened to the outside and the cooler outside air is drawn through the house using fans. In the morning, before sunrise, the fans will draw outside cool air in from the outside to cool the thermal mass of the house and then closes the house as the outside air heats to trap the cool air within the house to delay air conditioning operation and reduce the overall amount of AC runtime energy required to cool the house. This system can also operate in reverse to heat the home. The system uses multiple sensors and control mechanism to ensure optimal energy savings.

The present invention relates to a quality regulation control method of central air-conditioning refrigerating station and its system. It belongs to a method for controlling operation of central air-conditioning refrigerating station and its system. Said system includes internal weather parameter monitoring portion, central air-conditioning system operation parameter monitoring portion, quality regulation control main machine, cold water machine unit control unit for controlling water supply temperature for refrigeration, cooling tower frequency conversion control unit for controlling cooling tower outlet temperature, refrigerating water pump frequency conversion control unit and cooling water pump frequency conversion control unit. Besides, said invention also provides the concrete steps of its quality regulation control method.

The invention discloses a method for online prediction on cooling load of a central air conditioner in marketplace buildings. The method comprises the following steps of: continuously acquiring various parameters; when the quantity of acquired data meets the needs, respectively building prediction models of the air conditioner cooling load and all input parameter values in three types including working day, weekend and festival and holiday by using an Online SVR (Support Vector Regression) method; then, predicting the input parameter value of 24 hours of that very day according to the historical data of outdoor meteorological parameter and air conditioner operation input parameter; finally, predicting the air conditioner cooling load within 24 hours of that very day by using the air conditioner load prediction model of corresponding date type and taking the predicted value of each input parameter within 24 hours of that very day as the input, and compensating by a residual error sequence of the actual value and the predicted value of the air conditioner cooling load in the previous day of the corresponding date type; and simultaneously, dynamically correcting the prediction model of the air conditioner cooling load with online addition of new samples. The method provided by the invention effectively realizes the dynamic and accurate prediction on the air conditioner cooling load.

The invention provides a method for controlling opening of an electronic expansion valve in a central air-conditioning unit, which comprises the following steps of: 1, changing the opening of the electronic expansion valve according to difference of T suction and T target; and 2, after the opening of the electronic expansion valve is changed, when a compressor in the central air-conditioning unitoperates to a first preset time, if T exhaust is not in a preset range of exhaust superheat degree, changing the T target and turning to the step 1, otherwise setting T target to be T0 target and returning to the step 1, wherein T suction refers to an actual suction superheat degree of the compressor in the central air-conditioning unit, T exhaust refers to an actual exhaust superheat degree of the compressor, T target refers to an actual target suction superheat degree of the compressor, and T0 target refers to an initial target suction superheat degree of the compressor. By the control method, interference resistance of the central air-conditioning unit is improved, and the reliability of the central air-conditioning unit is improved.

The invention relates to the field of heating ventilation air conditioners, in particular to an improved air treatment method and a fresh air conditioner device. The invention improves the problems of traditional fresh air treatment and air conditioners and particularly emphasizes that a plate-type air-air heat exchanger and indirect water evaporative cooling are used for recycling energy of sensible heat and latent heat in air exhaust in the fresh air treatment process of damp and hot regions in summer and condensed water is directly evaporated on an evaporator to improve the working condition of a compressor. Under the condition of quantificationally supplying outdoor fresh air, the energy efficiency ratio of the fresh air conditioner is increased, the thermal pollution, damp pollution and noise pollution of the fresh air conditioner to environments are reduced, the indoor air quality is improved, and meanwhile, the fresh air conditioner provides the manufacture, installation and using convenience for a local region all-air central air conditioner. The fresh air conditioner provided by the invention and a design and manufacture method of the fresh air conditioner are applicable throughout the year in various regions, particularly in the damp and hot regions; and the fresh air system provides controlled, comfortable and healthy air environments for indoor activity space of people and air conditioner environments for technology for processing, storage and the like.

The invention discloses a central air-conditioning self-optimization intelligent fuzzy control device and a control method thereof. Technological parameters and indoor and outdoor environmental parameters of all control points of a central air-conditioning system are collected, running efficiency of a circulating system and control ends are tracked in real time according to actual load capacity of the system and end cold and hot source requirements, operation cycle of a main machine is optimized and adjusted, operation energy efficiency of each link of the system is comprehensively controlled, so that the system can always run under working conditions of high energy efficiency ratio. Meanwhile, process data, energy consumption data and equipment running data of the central air-conditioning system are summarized to form an intelligent control base, technical process such as analysis and operation is performed through the a central air-conditioning self-optimization intelligent fuzzy controller, new control strategies are generated, on-line upgrading control algorithm and energy-saving potential mining are achieved, energy consumption of the system is optimized, the operation is simplified, so that the operating efficiency of each device of the system is adjusted, and the aims of high efficiency, energy saving and intelligent control are achieved.

The invention discloses a method and a device for feedback control of the air quantity of a central air conditioner, which relates to a control technique for the central air conditioner. An existing air conditioner has an overlarge air quantity, wastes energy sources, blows hot and cold in turn and has a poor indoor comfort level. The method comprises the following steps of: 1) performing detection, namely detecting the air quantity at an outlet of a fan coil unit by a air quantity detection device, and measuring the indoor temperature by a temperature detection device; 2) performing air quantity calculation, namely, comparing the actual temperature with a set temperature to obtain the difference value of the actual temperature and the set temperature, and calculating the needed air quantity according to the temperature difference value; 3) performing air quantity compensation, namely, comparing the actual air quantity with the needed air quantity to obtain the difference value of the actual air quantity and the needed air quantity, calculating the rotating speed of a fan motor according to the air quantity difference value, and compensating the air quantity; and 4) performing regulation, namely performing the regulation according to the calculated rotating speed of the fan motor, and returning to the step 1) for circulation. The method and the device use a PI regulating unit to regulate the rotating speed of the motor so as to regulate the output air quantity, realize the double closed-loop control of the temperature and the air quantity, and achieve the effects of improving the comfort level and saving energy.

A combined-typed air purification and sterilization device, is used in air purifying field. The invention consists of particle collecting component, ozone- photocatalysis, air and water departing component, water spray-air and water isolation component. Particle collecting component is installed in the front with ozone-light catalysis at its back and water spray-air and water isolation component at last, all of them are separate and parallel with each other, linking closed to air pipe all around, and all the air currents cross particle collecting component , ozone- photocatalysis and water spray- air and water isolation component. The invention combines water mist absorption technique with the photocatalysis and ozone technique, uses water mist to absorb organic pollutant and ozone gas remained and creates clean air. The invention has excellent sterilization ability and absorbing organic pollutant effect, especially suitable for air purification in room of central air conditioning system to eliminate cross transmission of infectious disease caused by using central air conditioning system effectively, and used as air humidifying and purifying device as well.

The invention provides a central air-conditioning control system and a control method thereof, and belongs to the technical field of air-conditioning systems. The central air-conditioning control system comprises a universal equipment model library, an equipment performance testing module, a comfort level evaluating module, a genetic algorithm multi-objective optimization control module and an execution module. An actual measured method is used, a system model is established, and the central air-conditioning control system is high in precision and high in reliability and is adaptive; a genetic algorithm is used, multi-objective optimizing can be realized, the optimizing efficiency is high, the comfort level is high, energy is saved, and the cost is low; whether a user feels comfortable or not can be intelligently judged by a user behavior recognition mode, and control objectives are adjusted in time; and the control method can be optimal on the basis of environmental change, particularly at the transition season, the equipment efficiency can be greatly improved, and energy conservation and emission reduction are realized.

The invention relates to a central air-conditioning system, in particular to a duct air conditioner, namely an enhanced vapor injection air-conditioning circulating system. A vapor injection side electronic expansion valve of the system is subject to discharge superheat control instead of vapor injection superheat control; high discharge superheat is guaranteed, and heating capacity of the system can be further improved by vapor injection; the system is especially applicable to variable frequency compressors; high heating capacity is kept even under different operating frequencies; the system operates stably and fluctuates little. The enhanced vapor injection air-conditioning circulating system comprises a controller, a compressor, a four-way valve, a vapor-liquid separator, an economizer, a solenoid valve and a coolant pipe. The compressor is a variable frequency compressor. The economizer is a plate economizer. The electronic expansion valve controls vapor injection. The vapor injection electronic expansion valve is subject to discharge superheat control instead of vapor injection superheat control; accordingly, high discharge superheat is guaranteed, and heating capacity of the system is further improved by vapor injection. The system is especially applicable to variable frequency compressors; the heating capacity is kept even under different operating frequencies; the system operates stably and fluctuates little.

The invention relates to a system for simulating operation of a central air-conditioning. The system comprises a data collecting module for collecting building environment data required by simulating the operation of the air-conditioning; a simulation parameter selecting module, connected with the data collecting module, and used for selecting a parameter for simulation and a simulation mathematical model according to a simulated building object, and sending the data collected by the data collecting module and the selected parameter for simulation and the simulation mathematical model to the system simulation module; and a system simulation module, connected with the simulation parameter selecting module and used for carrying out simulation calculation by applying the selected simulation parameter and the simulation mathematical model according to the collected data. The system for simulating the operation of the central air conditioner can simulate the operation condition of the central air-conditioning system and provide reference data for the system to save energy.

The invention relates to an energy-saving control system and control method of a central air conditioning freezing station. The control system is an energy conservation system with a self-learning function, and comprises a relational database, an energy consumption self-optimization controller, a rolling optimization controller, a signal acquisition control cabinet, a cooling tower control cabinet, a cooling pump control cabinet, a refrigeration pump control cabinet, and a plurality of sensors. Through relational database modeling for each main current consuming device in the central air conditioning freezing station and rolling optimization of the relational database, energy consumption associated information of each main current consuming device is obtained, and through further energy consumption self-optimization course, an optimization parameter of the operation of devices in the freezing station is obtained, thus the integral central air conditioning freezing station operates at a high-efficient and energy-saving state.

A method, system, apparatus, and device to provide an effective, automatic means to effect exhaust, supply, or balanced ventilation, or a combination thereof, by automatically activating a ventilation fan for the selected operation time per cycle interval based on prior fan operation due to automatic cycle operation and user demand. In a second embodiment the ventilation fan controller automatically activates said ventilation fan in conjunction with operation of a blower of a central air conditioning system. In a third embodiment, the ventilation fan controller also automatically operates the blower for the selected operation time per blower cycle interval, including operation due to thermostat and / or humidistat demand and operates the ventilation fan in conjunction with operation of the blower and / or for the minimal time selected per interval, including operation due to user demand. Optionally, a position of an outside air intake damper is controlled in conjunction with activation of the blower.

A condensate secondary pan for a central air conditioning system is herein disclosed whereby overflow protection of the primary condensate removal system for a fan coil unit of a central air conditioning system is realized. The secondary pan is positioned directly beneath the primary pan of the central air conditioning system to convey condensate safely outside an enclosure should the primary pan overflow due to clogging of the primary drain line, or leak due to cracks or fissures formed in the primary pan. The condensate secondary pan has a predetermined girth sufficient to extend laterally beyond the primary pan of a conventional fan coil unit. The condensate secondary pan also has a bottom panel which is frustoconical in shape, thus minimizing the pooling of condensate on its surface as well as an integral drain pipe connecting means, thereby eliminating the need for a superfluous user supplied connecting means which is typically made of metal and thus is susceptible to corrosion.

This invention discloses a compressed central air-conditioning adaptive variable flow energy saving control device composed of an adaptive variable flow controller, ice water control subsystem, frozen water control subsystem, cooling water control subsystem, cooling tower blower fan control subsystem, the adaptive variable flow controller connects with control subsystem of ice water device, frozen water pump, cooling water and blower fan of cooling tower capable of making every operational target to reach the most optimized.

The invention applies to the technical field of controlling central air conditioners, and provides an intelligent optimal control system for central air conditioners, as well as a method thereof. The system comprises a sensor, an intelligent controller and a system equipment control device, wherein the sensor is used for acquiring the operation parameter information of every system; the intelligent controller analyzes and predicts the dynamic load of the cooling requirements of users according to the operation parameter information acquired by the sensor; and the intelligent controller controls the system equipment control device according to obtained load prediction results. The invention performs dynamic analytical prediction for the cooling requirements of the users by acquiring the operation parameter information of every system, utilizes an intelligent database to analyze the prediction results, equipment operation parameters and the like, puts forward an optimal operation proposal, and performs control, so as to give full play to the energy saving potential of the central air conditioners and gain maximum economic benefit.

A method and a device for controlling temperature difference between the supplied water and the back water at the end of a central air conditioner are disclosed. According to a received detected supplied water temperature signal value of the water supply pipe line and a back water temperature signal value of the back water pipe line, the differential value between the back water temperature signal value and the supplied water temperature signal value is compared with a preset temperature value. Opening of a ratio regulating valve disposed on the back water pipe line is adjusted according to the comparative result and preset conditions. The opening of the ration regulating valve is turned smaller to decrease back water flow based on the differential value between the back water temperature and the supplied water temperature and the preset temperature differential value. After operating for a while, the temperature difference between the supplied water and the back water is bigger than or equal to the preset temperature value. In a precondition that the temperature satisfies the preset requirements, room temperature control requirement is satisfied based on a preset room temperature value.

The invention discloses a central air conditioning control system and control method compatible with a local area network and a wide area network. The system comprises an air conditioning gateway, a wireless router and a remote server. The method comprises the following steps: analyzing a carried account, an MAC (Media Access Control) address of the air conditioning gateway and an IP (Internet Protocol) address of the intelligent terminal by the remote server when receiving a connection request transmitted by an intelligent terminal through the wide area network; establishing the connection correspondence of the IP address of the intelligent terminal and the IP address of the air conditioning gateway; forwarding a received control request transmitted by the intelligent terminal to the air conditioning gateway; controlling a central air conditioning by the air conditioning gateway according to the forwarded control request; controlling the central air conditioning according to the received control request if the air conditioning gateway receives the control request transmitted by the intelligent terminal in the local area network. According to the technical scheme, a user can control the central air conditioning through the intelligent terminal in the local area network and the wide area network respectively, so that the user can more conveniently control the central air conditioning and the user experience is improved.

The invention provides a group control method for a central air conditioning refrigerating unit. The group control method for the central air conditioning refrigerating unit comprises step A, entering into a step B when the water outlet temperature of a refrigerating unit basically achieves a stable temperature; step B, measuring the temperature and flow amount for water supply and water return of chilled water to obtain temperature difference and the flow amount of the water supply and the water return; step C, computing the load according to the temperature difference and the flow amount of the water supply and the water return; step D, controlling loading and unloading of refrigerating machines of the refrigerating unit. According to the group control method for the central air conditioning refrigerating unit, the group control algorithm for the refrigerating unit is achieved through thermal, the refrigerating unit is operated under an economical and energy saving state and the purposes of prolonging the service life of the device and reducing the energy consumption are achieved. The group control method for the central air conditioning refrigerating unit has a good popularization prospect in the fields of building automatic control and building energy saving.

The invention relates to a method and device for predicting the energy efficiency ratio of a refrigeration main machine of a central air-conditioning system. The method comprises the steps: S1, acquiring historical data of operating parameters of the central air-conditioning system; S2, processing the acquired historical data of the operating parameters of the central air-conditioning system to acquire effective historical data of the operating parameters, and setting cultivation parameters of a BP neural network cultivation model; S3, substituting the effective historical data of the operating parameter into the set BP neural network cultivation model to train to acquire a corresponding relational expression of the operating parameters of the central air-conditioning system and the energy efficiency ratio of the refrigeration main machine; S4, acquiring the operating parameters of the central air-conditioning system at the time T0 and substituting the operating parameters into the corresponding relation expression to obtain the energy efficiency ratio of the refrigeration main machine of the central air-conditioning system at the time T0. The energy efficiency ratio of the refrigeration main machine of the central air-conditioning system is predicted in advance, so that waste of energy consumption can be effectively avoided, the service life of the refrigeration main machine is prolonged and the indoor heat comfortability is improved.

The invention discloses a central air-conditioning modeling and controlling strategy on the basis of demand response, which comprises the following steps of building a room model, namely the relation between the indoor temperature and outdoor temperature of the room and sensible heat cooling load; building a center air-conditioning model suitable for the system operation of the demand response, namely the relation between air conditioning load and a decision variable; determining a controlling strategy, namely making an objective function, a control variable, a constraint condition and the like clear; solving the objective function by adopting a harmony search algorithm combining with a state space truncation method; obtaining a result, and performing analysis and treatment on the result. According to the central air-conditioning modeling and controlling strategy on the basis of the demand response, through meticulously building the models, making the strategy of multiple control variables cooperative optimization clear, scientific theoretical support is provided for the central air-conditioning to participate in the system operation of the demand response.

The invention discloses a system for remotely monitoring energy consumption of a central air-conditioning, which comprises a data acquisition terminal, an on-site work station and a data processing center. The data acquisition terminal is used for acquiring on-site data according to a preset sampling period, wherein the on-site data comprises central air-conditioning energy consumption parameters, environmental parameters and equipment operating parameters; the on-site work station is used for receiving the on-site data transmitted by the data acquisition terminal, and identifying, encrypting, packaging and transmitting the on-site data; and the data processing center is used for receiving the identified, encrypted and packaged on-site data which is transmitted by the on-site work station, and storing, managing and analyzing the on-site data. The on-site data is analyzed and processed by the data processing center, the central air-conditioning operating state can be monitored on line, real-time fault alarm is provided, and long-term safe operation of the system is guaranteed. The central air-conditioning energy consumption data is stored and managed for a long time, and the energy consumption rule is analyzed for a user by means of real-time data monitoring and other technical means; therefore, the energy-saving benefit is kept for a long time and even continuously increased.

The invention is a kind of system integrated by three casing pipe solar energy with energy storage and air-source heat pump, it relates to a kind of integrated system of heat pump. The aim of the invention is to settle the problem of application of air-source heat pump which makes network load rise gradually, ability of supplying heating of heat pump in winter and demanding of load of buildings not in-phase and makes efficiency of solar heat pump's collection low in the central air-conditioning system, at the same time, the cost is higher and it is often influenced by the weather. Intake of the first energy storage heat exchanger, Intake of the second energy storage heat exchanger and intake of the third energy storage heat exchanger connect with the second pipeline separately. The invention realizes electrical load's peak shifting and valley filling , balances heat pump heat-supplying load day and night in winter, adopts the running pattern of multiple heat sources which include air source, solar power and heat storage source, makes up for existing scarcity when single heat source runs, the air-condition can work at full load as much as possible. The invention can realize 5 kinds of operation patterns in summer and 4 kinds in winter.

The invention relates to a system for monitoring energy efficiency ratio of operation of a water cooler set and a monitoring method thereof. The system comprises a controller for monitoring the energy efficiency ratio of operation of the water cooler set, a local monitoring computer, a remote monitoring computer and a frozen water supply temperature sensor of a cold supply pipe network, a frozen water return temperature sensor of the cold supply pipe network, a frozen water flowmeter of the cold supply network and a power sensor of a refrigeration compressor which are correspondingly connected with the water cooler set; the frozen water supply temperature sensor of the cold supply pipe network, the frozen water return temperature sensor of the cold supply pipe network, the frozen water flowmeter of the cold supply network and the power sensor of the refrigeration compressor are connected with the controller for monitoring the energy efficiency ratio of operation of the water cooler set respectively; and the local monitoring computer and the remote monitoring computer are connected with a signal of the controller for monitoring the energy efficiency ratio of operation of the water cooler set through a convertor I and a convertor II respectively. The system is suitable for the water cooler set of a central air conditioning system using electric power as primary drive energy; and the measured energy efficiency ratio of operation of the water cooler set is suitable for supervising daily energy-saving operation of the water cooler set.

The invention discloses a central air conditioner fine control method. The method includes the steps of establishing energy consumption models of all sub-systems of an air conditioner, determining parameters to be recognized in the models of all the sub-systems, determining constraint conditions, establishing a target function of a global optimization control model, and conducting optimizing through a genetic algorithm. Modeling is conducted for energy consumption of a central air conditioning system, and the power consumed when the central air conditioning system runs in a working state of the capacity smaller than the rated capacity is reduced through the genetic algorithm; through the cooperation of various control strategies, the all-directional air conditioner fine control is achieved, the energy conservation scheme is more comprehensive and exquisite, and the energy conservation effect is more remarkable.

The invention relates to omnidirectional computer vision center air conditioning energy saving control device. It includes micro processor, air damper, blower fan, secondary refrigerant electric control valve. It can correctly detect out indoor person current position and number to adjust corresponding system. It can improve response rate, and reduce extra energy consumption. It is mainly used in huge commerce and office building to make user comfortable and healthy.