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34results about How to "Guaranteed heating capacity" patented technology
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Frost-less air-source heat pump hot water unit and proportional-integral-differential control method for same
InactiveCN103245151AWell mixedImprove performanceFluid heatersCorrosion preventionProportional integral differentialEngineering
The invention discloses a frost-less air-source heat pump hot water unit and a proportional-integral-differential control method for the same. The proportional-integral-differential control method includes performing computation according to received air temperature and humidity parameters, received air pressure parameters and received surface temperature parameters of an evaporator when outdoor temperature parameters which are transmitted by a temperature and humidity sensor and are received by a computation controller are lower than 0 DEG C, controlling the opening of an electronic expansion valve according to a computation result and regulating the surface temperature of the evaporator by means of increasing or reducing the opening of the electronic expansion valve so that the surface temperature of the evaporator is constantly higher than a frost formation point; and enabling a silicon-controlled power regulator to judge a suction superheat degree of a compressor according to received suction temperature and suction pressure of the compressor, increasing or reducing the power of an electric heater and maintaining that the suction superheat degree of the compressor only varies within a set value range. The frost-less air-source heat pump hot water unit and the proportional-integral-differential control method have the advantage that adjustment for the opening of the electronic expansion valve is matched with adjustment for the power of the electronic heater, so that the purpose of maintaining safe and efficient running of a system is achieved.
Owner:NANJING NORMAL UNIVERSITY +1
Variable refrigerant flow air conditioning system and control method thereof
InactiveCN103123147AGuaranteed thermal comfortShorten the timeSpace heating and ventilation safety systemsLighting and heating apparatusEngineeringElectromagnetic valve
Disclosed is a variable refrigerant flow air conditioning system. The variable refrigerant flow air conditioning system is mainly composed of an outdoor unit, an indoor unit and a controller. The outdoor unit is formed by parallel connection of a first outdoor unit and a second outdoor unit. When one of the outdoor units needs defrosting operation, refrigerating fluid of a heating operating loop and refrigerating fluid of a defrosting operating loop are separated through opening and closing of an electromagnetic valve and an electronic expansion valve, and therefore heating and defrosting can not affect each other. Meanwhile, the refrigerating fluid circulation amounts in the heating loop and the defrosting loop are adjusted through control of the electromagnetic valve and the electronic expansion valve, the heating amount of the indoor unit is guaranteed through improvement of the frequency of a compressor corresponding to a heating operating system, and therefore the heat comfort degree of the indoor unit can be guaranteed. According to the variable refrigerant flow air conditioning system, normal heating of the indoor unit in the process of the defrosting operation can be guaranteed; and besides, in the process of entering and exiting from the defrosting process, the compressor does not need to be shut down, a four-way valve does not need to be reversed, and therefore defrosting operation time is greatly shortened, and comfortableness of an indoor environment is effectively improved.
Owner:NINGBO AOKESI ELECTRIC EQUIP FACTORY
Air source heat pump unit and defrosting control method thereof
PendingCN109539622AAvoid damageGuaranteed heating capacityMechanical apparatusSpace heating and ventilation safety systemsEngineeringPlate fin heat exchanger
The invention discloses an air source heat pump unit and a defrosting control method thereof. The air source heat pump unit comprises a compressor, a gas-liquid separator, an high-efficient tank heatexchanger, a fin heat exchanger, an outdoor temperature and humidity sampling module and four-way reversing valves, the compressor and the gas-liquid separator are connected through the four-way reversing valve in a tube connecting mode, and the fin heat exchanger and the high-efficient tank heat exchanger are connected through the four-way reversing valve in a tube connecting mode; and the defrosting method of the unit comprises the steps that outdoor environment is divided into different environment regions according to the environment temperature and relative humidity, the region where theoperating environment is located is determined according to the current temperature and the humidity of the operating environment, and then the frosting detection and the defrosting treatment are carried out respectively according to the control logic of each region. According to the method, the frosting condition of the outdoor heat exchanger of the unit can be accurately detected under differentenvironment conditions, and different operations are carried out according to the actual frosting condition through a control system to achieve the effect that defrosting is carried out when the heatexchanger is frosted, heating is carried out when the heat exchanger is not frosted, defrosting is carried out according to the thickness of the frost, and the heating operation capability is fully ensured.
Owner:SHANGHAI HIGHLY REALNEN ENVIRONMENTAL TECH
Frostless air handling unit and proportion-integration-differential control method thereof
InactiveCN103216981AWell mixedImprove performanceCorrosion preventionRefrigeration safety arrangementElectricityEngineering
The invention discloses a frostless air handling unit and a proportion-integration-differential control method of the frostless air handling unit. The frostless air handling unit comprises a circulating working return circuit and a controllable silicon power adjuster, wherein the circulating working return circuit is composed of a compressor assembly, a condenser, an electronic expansion valve and an evaporator assembly, the compressor assembly, the condenser, the electronic expansion valve and the evaporator assembly are sequentially connected along the refrigerating fluid flowing direction. When a calculation controller receives an outdoor temperature parameter transmitted by a temperature-humidity sensor and the temperature parameter is lower than 0 DEG C, the calculation controller carries out calculation according to received air temperature and humidity parameters, an air pressure parameter and an evaporator surface temperature parameter, controls the opening degree of the electronic expansion valve according to the calculation results, and adjusts evaporator surface temperature through increase or reduction of the opening degree of the electronic expansion valve. Meanwhile, the controllable silicon power adjuster judges an air suction superheat degree of a compressor through received compressor air suction temperature and air suction pressure, adjusts increase or reduction of electric heater power, and maintains the air suction superheat degree of the compressor to be kept in a preset value range. According to the frostless air handling unit and the proportion-integration- differential control method of the frostless air handling unit, the aim of maintaining safe and high-efficiency operation of the system is achieved.
Owner:宁波沃弗圣龙环境技术有限公司 +1
Heat pump air conditioning system and control method thereof
ActiveCN103542606AReduce exhaust temperatureGuaranteed uptimeEfficient regulation technologiesFluid circulation arrangementRefrigerantEvaporator
The invention discloses a heat pump air conditioning system and a control method thereof. The heat pump air conditioning system comprises a compressor, a four-way valve, an evaporator, a condenser, a first throttling device, a second throttle device, a heat recovery device and a heat exchange device; heat exchange is performed on a refrigerant which is located in a first channel and a refrigerant which is located in a second channel in the heat recovery device; heat exchange is performed on a refrigerant which is located in a third channel and a refrigerant which is located in a fourth channel in the heat exchange device. According to the heat pump air conditioning system, a gaseous refrigerant which is supplied by the heat exchange device is added into the compressor when the heat pump air conditioning system is located in the low temperature state and accordingly the heating capacity is ensured when the heat pump air conditioning system is located in the low temperature state, the displacement of the exhaust opening of the compressor is ensured, the exhaust temperature is reduced, and meanwhile the damage to the compressor due to liquid impact of the refrigerants is prevented.
Owner:广东TCL智能暖通设备有限公司
Method for controlling electric heating of air conditioner, control device and air conditioner
InactiveCN104864542AGuaranteed heating capacityReduce power consumptionMechanical apparatusSpace heating and ventilation safety systemsElectricityElectric consumption
The invention provides a method for controlling electric heating of an air conditioner. The method comprises the following steps: obtaining the current indoor temperature from a temperature obtaining device which is connected with the air conditioner; judging whether the electric heating function of the air conditioner is opened or not when the air conditioner is at the heating mode and a compressor of the air conditioner is opened; when the electric heating function is opened, comparing the current indoor temperature with the preset indoor temperature and then when the comparison result shows that the current indoor temperature is lower than the preset indoor temperature, obtaining the current operation frequency of the air conditioner and the duration time of the current operation frequency; when the current operation frequency is equal to the maximum target frequency and the duration time reaches the first preset duration time, opening the electric heating function of the air conditioner. Correspondingly, the invention also provides a control device of electric heating of the air conditioner and the air conditioner. By the technical solution of the invention, the heating capacity of the air conditioner is ensured and the electric consumption amount of the air conditioner is reduced, and energy saving of the air conditioner is actually achieved.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD
Water cooling heat pump type multiple air-conditioning unit
ActiveCN101338951AImprove energy efficiency ratioSmall form factorHeat pumpsCompression machines with reversible cycleFour-way valveVapor–liquid separator
A water-cooling heat pump typed multi-connected air-conditioning unit comprises a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a liquid receiver, a liquid valve, a gas valve, a plurality of indoor electronic expansion valves, a plurality of indoor heat exchangers and a gas-liquid separator which are connected through pipes. The multi-connected air-conditioning unit is characterized in that the outdoor heat exchanger is a water-cooling heat exchanger; the pump unit comprises an oil-return device in the outdoor heat exchanger, and a subcooler. The outdoor heat exchanger of the invention adopts a water-cooled heat exchanger, which significantly increases the energy efficiency ratio of the pump unit, reduces the external dimension of the pump unit. The oil-return device in the outdoor heat exchanger ensures the pump unit to have good oil-return characteristics in thermo-producing conditions, thus realizing the safe and reliable running of the pump unit. The subcooler can prevent instantaneous vaporization of the refrigerant during long-range transmission, thus maintaining the stable and reliable economic running of the pump unit under high head drop of a long connecting pipe.
Owner:NANJING TICA AIR CONDITIONING CO LTD
Outdoor unit, air conditioning system and control method
InactiveCN108168138AGuaranteed heating capacityGuaranteed reliabilityMechanical apparatusCorrosion preventionEngineeringAir conditioning
The invention provides an outdoor unit, an air conditioning system and a control method. The outdoor unit comprises a first connecting pipe and a second connecting pipe, wherein the first connecting pipe and the second connecting pipe communicate with an indoor unit. The outdoor unit further comprises a compressor, two heat exchangers, two reversing valves and two throttling devices. Each heat exchanger communicates with the corresponding reversing valve. According to the outdoor unit, the air conditioning system and the control method, by means of the two heat exchangers, when a defrosting process of the air conditioner outdoor unit starts, part of high-temperature refrigerant enters the indoor unit, and the indoor unit does not stop but conducts heating continuously when defrosting is conducted through the outdoor unit, so that the heating capacity of a machine set is strongly guaranteed; the air outlet temperature and comfort of the indoor side are maintained, and in addition, onlythe first heat exchanger is adopted to work under the circumstance of high-temperature heating or low-temperature cooling; the high pressure and the lower pressure of the system are adjusted properly;and reliability and comfort of the machine set are guaranteed better.
Owner:GREE ELECTRIC APPLIANCES INC
Heat storage type air source heat pump water cooling and heating system and operation method thereof
ActiveCN105318466ALow costReduce selection capacityLighting and heating apparatusAir conditioning systemsEngineeringWater cooling
The invention provides a heat storage type air source heat pump water cooling and heating system and an operation method thereof, and belongs to the field of heat pump technologies and refrigerating air conditioners. The system comprises an outdoor source side, a heat pump host, a user side and a heat storage module. The outdoor source side comprises a refrigerating medium pump, an air cooling heat exchanger and source side valves. An outlet of the refrigerating medium pump is sequentially connected with the air cooling heat exchanger and the source side valves through pipelines and then returns to an inlet of the refrigerating medium pump through a first liquid cooling type heat exchanger of the heat pump host. A heat storage side mainly comprises a first valve, a second valve, a heat storage box, a third valve and a fourth valve. One side of the heat storage box is sequentially connected with the first valve and the source side valves on the source side through pipelines and then returns to the heat storage box through the second valve. The other side of the heat storage box is sequentially connected with the third valve and the user side valve on the user side through pipelines and then returns to the heat storage box through the fourth valve. By adopting the heat storage type air source heat pump water cooling and heating system, the capacity of a heat pump system supplying heat in winter can be greatly reduced, the primary investment is lowered, and the operation efficiency of the heat pump is improved.
Owner:TSINGHUA UNIV
Transcritical CO2 heat pump system based on precooler and water path two-way valve control method of transcritical CO2 heat pump system
ActiveCN109323477AGuaranteed heating capacityGuarantee normal performanceMechanical apparatusHeat pumpsProgrammable logic controllerEvaporator
The invention discloses a transcritical CO2 heat pump system based on a precooler and a water path two-way valve control method. A conventional transcritical CO2 heat pump system is assisted by a precooler system; a circulating water path is divided into two parts in the system through a three-way shunt valve and a three-way water catchment valve, and the two parts are connected through a water path two-way adjusting valve and a water path bypass valve; and meanwhile, in cooperation with an environment temperature sensor, an evaporator fin temperature sensor and an evaporation pressure sensor,a programmable logic controller is adopted as a collecting, operation and control core. By means of the system configuration and a properly constituted temperature, pressure and time combined controlmethod, popularization of the transcritical CO2 heat pump system to the field of heat supply can be achieved, performance degradation caused by high return water temperature to the transcritical CO2heat pump system is made up, and a unit is properly controlled to enter in and quit from defrosting; and the problem that the transcritical CO2 heat pump system stops supplying heat within a relatively long defrosting time, and the average temperature of a circulating water system is fast reduced is solved.
Owner:XI AN JIAOTONG UNIV
Air conditioning system and control method and control device thereof and storage medium
ActiveCN111473496AReduce openingImprove experienceMechanical apparatusSpace heating and ventilation safety systemsEngineeringAir conditioning
The invention provides an air conditioning system and a control method and a control device thereof and a storage medium. A first electronic expansion valve is arranged at a refrigerant inlet of eachindoor unit. An outdoor unit comprises an outdoor heat exchanger and a first compressor. The first compressor is used for compressing a first refrigerant medium. A second compressor of a hydraulic module is used for compressing a second refrigerant medium. An outlet of the outdoor heat exchanger is connected to an inlet of the first refrigerant medium. The control method comprises the following steps of recognizing main refrigerating operation of the air conditioning system and taking the indoor unit in heating operation as a candidate indoor unit; detecting the condensing temperature of the candidate indoor unit and acquiring the candidate indoor unit with insufficient heating capacity according to the condensing temperature; taking the candidate indoor unit with insufficient heating capacity as a target indoor unit and carrying out heating protection on the target indoor unit; and controlling the second compressor to be reduced to a preset frequency and controlling a second electronic expansion valve to be reduced to a preset aperture to ensure the heating quantity of a heating indoor unit.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Heat pump humidifying device and working method
ActiveCN108224606AEfficient humidification effectEconomic humidification effectLighting and heating apparatusSpace heating and ventilation detailsAtmospheric airEngineering
The invention discloses a heat pump humidifying device and a working method. The heat pump humidifying device comprises a heat pump system, a solar heat collector and a spraying air supply system. Themethod is characterized by being dividing into three working modes according to the atmospheric environment temperature T0 and the water temperature difference Delta T of water at an inlet and an outlet of the solar heat collector, and the three working modes comprises A, the working mode in which the T0 is larger than or equal to 15 DEG C and the Delta T is larger than or equal to 30 DEG C; B, the working mode in which the T0 is larger than or equal to 15 DEG C and the Delta T is less than 30 DEG C; and C, the working mode in which the T0 is less than 15 DEG C and the Delta T is less than 30DEG C. According to the heat pump humidifying device and the working method, the heat pump technology is coupled with the solar heat collection technology, so that a heat pump and the solar heat collector are connected in series / in parallel to work, and the yield and preparation efficiency of steam are improved; and compared with an existing humidifying device, the device has the advantages of being high in steam yield, good in energy efficiency, economical in operation and wide in application range.
Owner:JIANGSU UNIV OF SCI & TECH
Frostless air handling unit and proportion-integration-differential control method thereof
InactiveCN103216981BExtended service lifeGuaranteed uptimeCorrosion preventionRefrigeration safety arrangementElectricityEngineering
The invention discloses a frostless air handling unit and a proportion-integration-differential control method of the frostless air handling unit. The frostless air handling unit comprises a circulating working return circuit and a controllable silicon power adjuster, wherein the circulating working return circuit is composed of a compressor assembly, a condenser, an electronic expansion valve and an evaporator assembly, the compressor assembly, the condenser, the electronic expansion valve and the evaporator assembly are sequentially connected along the refrigerating fluid flowing direction. When a calculation controller receives an outdoor temperature parameter transmitted by a temperature-humidity sensor and the temperature parameter is lower than 0 DEG C, the calculation controller carries out calculation according to received air temperature and humidity parameters, an air pressure parameter and an evaporator surface temperature parameter, controls the opening degree of the electronic expansion valve according to the calculation results, and adjusts evaporator surface temperature through increase or reduction of the opening degree of the electronic expansion valve. Meanwhile, the controllable silicon power adjuster judges an air suction superheat degree of a compressor through received compressor air suction temperature and air suction pressure, adjusts increase or reduction of electric heater power, and maintains the air suction superheat degree of the compressor to be kept in a preset value range. According to the frostless air handling unit and the proportion-integration- differential control method of the frostless air handling unit, the aim of maintaining safe and high-efficiency operation of the system is achieved.
Owner:宁波沃弗圣龙环境技术有限公司 +1
Outdoor unit with continuous heating function, air conditioner system and control method
PendingCN110332618AGuaranteed heating capacityMechanical apparatusSpace heating and ventilation safety systemsEngineeringRefrigerant
The invention provides an outdoor unit with the continuous heating function, an air conditioner system and a control method. The outdoor unit comprises a compressor, a first heat exchanger, a second heat exchanger, a first reversing valve, a second reversing valve and two throttling devices; the first heat exchanger has the first state and the second state, according to the first state, one end ofthe first heat exchanger is connected with an exhaust port of the compressor, and the other end of the first heat exchanger is connected with a first connecting pipe; and according to the second state, one end of the first heat exchanger is connected with an air suction port of the compressor, and the other end of the first heat exchanger is connected with the first connecting pipe. According tothe outdoor unit with the continuous heating function, the air conditioner system and the control method, the two heat exchangers are arranged, when the air conditioner outdoor unit enters in the defrosting process, one part of high-temperature refrigerant can enter an indoor unit, the aim that during outdoor unit defrosting, the indoor unit is not shut down and continuously heat is achieved, theunit heating amount is forcefully ensured, and the air outlet temperature and the comfort of the indoor side are kept.
Owner:GREE ELECTRIC APPLIANCES INC
Frost-less air-source heat pump hot water unit and proportional-integral-differential control method for same
InactiveCN103245151BExtended service lifeSmooth and continuous adjustmentFluid heatersCorrosion preventionProportional integral differentialEngineering
The invention discloses a frost-less air-source heat pump hot water unit and a proportional-integral-differential control method for the same. The proportional-integral-differential control method includes performing computation according to received air temperature and humidity parameters, received air pressure parameters and received surface temperature parameters of an evaporator when outdoor temperature parameters which are transmitted by a temperature and humidity sensor and are received by a computation controller are lower than 0 DEG C, controlling the opening of an electronic expansion valve according to a computation result and regulating the surface temperature of the evaporator by means of increasing or reducing the opening of the electronic expansion valve so that the surface temperature of the evaporator is constantly higher than a frost formation point; and enabling a silicon-controlled power regulator to judge a suction superheat degree of a compressor according to received suction temperature and suction pressure of the compressor, increasing or reducing the power of an electric heater and maintaining that the suction superheat degree of the compressor only varies within a set value range. The frost-less air-source heat pump hot water unit and the proportional-integral-differential control method have the advantage that adjustment for the opening of the electronic expansion valve is matched with adjustment for the power of the electronic heater, so that the purpose of maintaining safe and efficient running of a system is achieved.
Owner:NANJING NORMAL UNIVERSITY +1
Novel inlet and outlet pipe opening structure of warm wind radiator
The invention relates to a novel inlet and outlet nozzle structure of a warm air radiator, which includes a core body and a water chamber. The core body is installed between the upper and lower water chambers, and one side of the upper water chamber is connected and installed. The water outlet is connected to the water inlet on one side of the lower water chamber, and the water inlet is inclined at an angle to the front end or rear end of the core. The inlet and outlet nozzles in this structure are inclined at an angle, which not only reduces the volume of the entire product, but also increases the volume of the sealed inner cavity between the water chamber and the end plate, which improves the flow rate of the medium in the core per unit time, and The manufacturing difficulty of the connecting pipe for entering and exiting is reduced. This structure makes the medium flowing into the water inlet pipe directly impact the inner wall of the water chamber, reduces the impact force of the medium on the heat dissipation pipe, and effectively improves the product quality.
Owner:TIANJIN YAXING RADIATOR
A transcritical CO with precooler 2 Heat pump system and water circuit two-way valve control method
ActiveCN109323477BGuaranteed heating capacityGuarantee normal performanceMechanical apparatusHeat pumpsProgrammable logic controllerEngineering
The invention discloses a transcritical CO based on a precooler 2 The heat pump system and the waterway two-way valve control method, the conventional transcritical CO 2 The heat pump system is assisted by a pre-cooler system; the circulating water circuit is divided into two parts in the system through the three-way water diversion valve and the three-way water collection valve, and connected by the two-way water channel regulating valve and the water channel bypass valve; The ambient temperature sensor, evaporator fin temperature sensor and evaporation pressure sensor are used, and the programmable logic controller is used as the core of acquisition, calculation and control. Through the above system configuration and a well-developed joint control method of temperature, pressure and time, transcritical CO 2 The promotion of heat pump systems to the heating field can make up for the impact of high return water temperature on transcritical CO 2 System performance degradation, proper control of units entering and exiting defrost, and addressing transcritical CO 2 The heat pump system stops heating during a relatively long defrosting time, and the average temperature of the circulating water system drops rapidly.
Owner:XI AN JIAOTONG UNIV
Air conditioner defrosting control method and device
ActiveCN106679106BGuaranteed heating capacityGuaranteed heating effectMechanical apparatusEngineeringAir conditioning
The invention relates to the technical field of air conditioning control, in particular to an air conditioner defrosting control method and device. The air conditioner defrosting control method comprises the steps that S0, an air conditioner enters a defrosting mode; S1, defrosting is conducted by selecting a to-be-defrosted heat exchange branch from a plurality of heat exchange branches connected in parallel, the defrosted heat exchange branch communicates with a refrigerant pipeline of an air conditioner, and the rest of the heat exchange branches are disconnected with the refrigerant pipeline; S2, the actual pressure of the defrosted heat exchange branch is obtained; S3, the actual pressure of the defrosted heat exchange branch is compared to the preset pressure of the heat exchange branch, if the actual pressure of the defrosted heat exchange branch is higher than the preset pressure of the heat exchange branch, defrosting is completed, and the step S4 is carried out, and otherwise, the step S2 is conducted; S4, whether a to-be-defrosted heat exchange branch exists is judged, if yes, the process returns to step S1, and if defrosting of all the to-be-defrosted heat exchange branches is completed, the step S5 is conducted; and S5, the defrosting mode of the air conditioner is stopped. Defrosting is thorough, and the defrosting speed is high.
Owner:GD MIDEA AIR CONDITIONING EQUIP CO LTD
Air-conditioning system achieving continuous heating
InactiveCN111649500AImprove user experienceReasonable designMechanical apparatusCorrosion preventionVapor–liquid separatorFour-way valve
The invention relates to an air-conditioning system achieving continuous heating. The D end of a four-way valve I, the D end of a four-way valve II and the D end of a four-way valve III are mutually connected in parallel and then connected to an exhaust port of a compressor; the E end of the four-way valve III is connected with the air end of an indoor heat exchanger, the C end of the four-way valve I is connected with the air end of an outdoor heat exchanger I, and the C end of the four-way valve II is connected with the air end of an outdoor heat exchanger II; the S end of the four-way valveI, the S end of the four-way valve II and the S end of the four-way valve III are mutually connected in parallel and then connected to an inlet of an air-liquid separator; an outlet of the air-liquidseparator is connected with a suction port of the compressor; the liquid end of the outdoor heat exchanger I and the liquid end of the outdoor heat exchanger II pass through an expansion valve I andan expansion valve II respectively to be mutually connected in parallel and then connected to the liquid end of the indoor heat exchanger; and the E end of the four-way valve I, the E end of the four-way valve II and the C end of the four-way valve III are all closed. It is guaranteed that the air-conditioning system achieving continuous heating can continuously supply heat to the indoor.
Owner:NANJING TICA AIR CONDITIONING CO LTD
Heat pump humidifier and working method
ActiveCN108224606BRealize series/parallel operationIncrease productionLighting and heating apparatusSpace heating and ventilation detailsThermodynamicsCollector device
The invention discloses a heat pump humidifying device and a working method. The device comprises: a heat pump system, a solar heat collector and a spray air supply system. The method is based on the atmospheric temperature T 0 and the inlet and outlet water temperature difference ΔT of the solar heat collector are divided into three working modes, namely: A, T 0 ≥15℃, △T≥30℃ working mode, B, T 0 ≥15°C, △T<30°C working mode, C, T 0 <15°C, △T<30°C working mode; the invention couples the heat pump technology with the solar heat collection technology, realizes the series / parallel operation of the heat pump and the solar heat collector, and improves the steam production and production efficiency; compared with the existing With a humidifying device, the present invention has many advantages of high steam output, good energy efficiency, economical operation and wide application range.
Owner:JIANGSU UNIV OF SCI & TECH
Heating vibration screw extractor
InactiveCN101829974BReduce frictionSolve the difficult situation of disassemblyMetal-working hand toolsScrew extractorInduction heater
The invention relates to a screw extractor, in particular to a heating vibration screw extractor. The invention solves the problem that the existing screw extractor is hard to disassemble some shaft fastening pieces with tight fitness. The heating vibration screw extractor comprises a mandrel and a falcula connected with the mandrel, wherein a vibrator with adjustable vibration frequency is arranged on the top of the mandrel; the screw extractor also comprises a group of high frequency induction heaters, wherein a magnet is arranged on one end of each high frequency induction heater. When in use, the high frequency induction heaters heat the outer surfaces of the parts to be disassembled so as to reduce the interference degree between the parts to be disassembled; and the parts to be disassembled perform strong resonance vibration under the action of the vibrator so as to greatly reduce the friction force between the parts to be disassembled. In order to solve the situation that the friction force between the parts to be disassembled is too large, the vibrator is installed on the mandrel of the screw extractor of the invention to perform forced vibration of the parts to be disassembled and the heating device is added on the screw extractor, thus greatly reducing the friction force between the parts to be disassembled and solving the condition that the original screw extractor is hard to be used for disassembly.
Owner:TAIYUAN COAL GASIFICATION GROUP
Air conditioner, control method thereof and computer readable storage medium
PendingCN114322243AGuaranteed heating capacityIncrease temperatureMechanical apparatusCompression machines with reversible cycleProcess engineeringOutdoor temperature
The invention discloses a control method of an air conditioner, an outdoor unit of the air conditioner is provided with a heater, a four-way valve and a compressor, the compressor comprises a first air inlet, a second air inlet and an air nozzle, the first air inlet is connected with the four-way valve, the first end of the heater is connected with the air nozzle, and the second end of the heater is connected with the air nozzle. The first end of the heater is connected with the first air inlet, the second end of the heater is connected with the second air inlet, a first valve is connected between the heater and the second air inlet, and the control method of the air conditioner comprises the following steps that after the air conditioner runs in a heating mode, the target temperature is obtained, the target temperature comprises at least one of the outdoor temperature and the outlet temperature of the air nozzle; when the target temperature is smaller than a first preset temperature, the first valve is opened; and controlling the heater to operate. The invention further discloses the air conditioner and a computer readable storage medium. The heating capacity of the air conditioner is guaranteed.
Owner:FOSHAN CITY SHUNDE DISTRICT BAINIAN TECH CO LTD +1
Water cooling heat pump type multiple air-conditioning unit
ActiveCN101338951BImprove energy efficiency ratioSmall form factorHeat pumpsCompression machines with reversible cycleFour-way valveVapor–liquid separator
A water-cooling heat pump typed multi-connected air-conditioning unit comprises a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a liquid receiver, a liquid valve, a gas valve, a plurality of indoor electronic expansion valves, a plurality of indoor heat exchangers and a gas-liquid separator which are connected through pipes. The multi-connected air-conditioning unit is characterized in that the outdoor heat exchanger is a water-cooling heat exchanger; the pump unit comprises an oil-return device in the outdoor heat exchanger,and a subcooler. The outdoor heat exchanger of the invention adopts a water-cooled heat exchanger, which significantly increases the energy efficiency ratio of the pump unit, reduces the external dimension of the pump unit. The oil-return device in the outdoor heat exchanger ensures the pump unit to have good oil-return characteristics in thermo-producing conditions, thus realizing the safe and reliable running of the pump unit. The subcooler can prevent instantaneous vaporization of the refrigerant during long-range transmission, thus maintaining the stable and reliable economic running of the pump unit under high head drop of a long connecting pipe.
Owner:NANJING TICA AIR CONDITIONING CO LTD
A heat storage type air source heat pump cold and hot water system and its operation method
ActiveCN105318466BLow costReduce selection capacityLighting and heating apparatusAir conditioning systemsPlate heat exchangerEngineering
Owner:TSINGHUA UNIV
Air conditioning system and its control method and device, storage medium
ActiveCN111473496BGuaranteed heating capacityMechanical apparatusSpace heating and ventilation safety systemsCondensation temperatureEngineering
The present invention proposes an air conditioning system, its control method and device, and storage medium. The refrigerant inlet of each indoor unit is provided with a first electronic expansion valve. The outdoor unit includes an outdoor heat exchanger and a first compressor. For compressing the first cold medium, the second compressor of the hydraulic module is used to compress the second cold medium, and the outlet of the outdoor heat exchanger is connected to the inlet of the first cold medium of the first heat exchanger. The control method includes the following steps: identification The air conditioning system is mainly in cooling operation, and the indoor unit in heating operation is used as a candidate indoor unit; the condensation temperature of the candidate indoor unit is detected, and the candidate indoor unit with insufficient heating capacity is obtained according to the condensation temperature; the candidate indoor unit with insufficient heating capacity As the target indoor unit, and perform heating protection for the target indoor unit; control the second compressor to reduce to a preset frequency and control the second electronic expansion valve to reduce to a preset opening to ensure the heating capacity of the heating indoor unit.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Energy-saving water mixing heat supply unit
ActiveCN114738814ALow powerReduce configurationLighting and heating apparatusSustainable buildingsWorking fluidEngineering
The invention relates to the field of heat supply units, in particular to a novel energy-saving water mixing heat supply unit based on an adjustable ejector. The low-area circulating system and the high-area circulating system are connected through an adjustable ejector; the adjustable ejector comprises an adjusting assembly, a working fluid inlet chamber, an ejected fluid inlet chamber, a mixing diffusion chamber and a pressure stabilizing chamber, the working fluid inlet chamber is provided with a working fluid inlet, and the working fluid inlet is communicated with a high-area primary net water return pipe; the side wall, facing the ejected fluid inlet chamber, of the working fluid inlet chamber is fixedly provided with an ejection groove in the horizontal direction, one end of the ejection groove is communicated with the working fluid inlet chamber, the other end of the ejection groove is an ejection nozzle, the ejection nozzle is located in the ejected fluid inlet chamber, the ejected fluid inlet chamber is provided with an ejected fluid inlet, and the ejected fluid inlet is communicated with the ejection nozzle. The ejected fluid inlet is communicated with the low-area primary net water return pipe, and the outlet of the pressure stabilizing chamber is communicated with the low-area secondary net water supply pipe. Stable and reliable heat supply effect can be guaranteed, and electricity can be saved during operation.
Owner:OCEAN UNIV OF CHINA
An air-cooled PVT air conditioner external unit and its operating method
ActiveCN111578390BRealize complementary advantagesIncrease profitMechanical apparatusEvaporators/condensersProcess engineeringAir conditioning
The invention relates to an air-cooled PVT air conditioner outdoor unit and its operation method. The air-cooled PVT outdoor unit includes a fan, a PVT condensation / evaporation coil branch, a PVT heat exchange plate, a conventional condensation / evaporation coil branch, and a PVT Water coil. Combining the air conditioner condenser / evaporator and PVT components, integrating the entire outdoor unit to work and install together, making full use of daytime solar energy and nighttime long-wave radiation energy, and adopting different cooling / heating / power supply schemes for different seasons and time periods, to achieve The advantages of PVT components and the condenser / evaporator of the air conditioning unit complement each other to improve the utilization rate of the system throughout the year and around the clock. In the present invention, the PVT assembly and the air-cooled outdoor unit can work independently and jointly, which is more convenient to ensure the cooling / heating capacity of the system in all seasons and different outdoor environments, and achieve the purpose of energy saving.
Owner:HEBEI UNIV OF TECH
Spraying type enhanced heat exchange flue gas heat exchange device
PendingCN113175683AImprove heat transfer effectAvoid pulsating noiseLighting and heating apparatusCombustion technology mitigationNitrogen oxidesFlue gas
The invention belongs to the technical field of heat exchange devices, and provides a spraying type enhanced heat exchange flue gas heat exchange device. The device is provided with a flue gas inlet, a flue gas outlet, a plurality of flue gas heat exchangers, a wastewater treatment part and a spraying part, flue gas generated by an engine passes through the flue gas heat exchangers through the flue gas inlet, so that the flue gas flows through the flue gas heat exchangers from top to bottom, and sufficient heat exchange can be achieved. The wastewater treatment part is arranged below the flue gas heat exchangers and can treat wastewater, a spray head of the spraying part can spray water to the flue gas before the flue gas enters into the flue gas heat exchangers, water-soluble nitric oxide in the flue gas is removed, and heat exchange of the flue gas heat exchangers is enhanced. The flue gas and condensed water flow through the flue gas heat exchangers in the same direction, and pulsation noise of liquid in the flue gas is avoided. A water pump assembly is arranged on a pipeline between the spray head and the wastewater treatment part, the treated wastewater is pumped into the spray head to spray the flue gas, at least one flue gas heat exchanger is arranged on the upstream of the spray head, spraying is not needed when the heat exchange temperature is low, water is effectively saved, and resource waste is avoided.
Owner:SHANGHAI AIRUTE AIR CONDITIONING SYST
Machine-pump combined drive enthalpy-increasing type working medium side waste heat recovery air source heat pump bathing hot water unit
ActiveCN113048648AIncrease profitReduce environmental loadFluid heatersMechanical apparatusMechanical engineeringElectronic expansion valve
The invention relates to a machine-pump combined drive enthalpy-increasing type working medium side waste heat recovery air source heat pump bathing hot water unit which comprises a refrigerant system, a hot water system and a waste water system. A compressor, a fluorine pump, an electromagnetic valve and an electronic expansion valve are controlled to start and stop, so that a mode for preparing medium-low temperature hot water through pump power type waste water waste heat recovery, a mode for preparing medium-temperature hot water through machine-pump combined drive enthalpy-increasing type waste water source heat pump waste heat recovery and a mode for preparing high-temperature hot water through a machine-pump combined drive enthalpy-increasing type air source heat pump are achieved, and hot water is provided all the year round. According to the machine-pump combined drive enthalpy-increasing type working medium side waste heat recovery air source heat pump bathing hot water unit provided by the invention, the clean and pollution-free air with abundant reserves is used as a heat source of the system, and energy configuration is green, stable and sustainable; the compressor and the pump are used as driving force, so that the system operation stability is improved, and the system operation energy consumption is reduced; the energy supply stability and reliability of the system under the most unfavorable working condition are improved by relying on an air supply enthalpy increasing technology; and the system is energy-saving, efficient, low in operation cost and easy and convenient to install and maintain, energy consumption of a building space unit is greatly reduced, and meanwhile, waste heat discharged into the environment is reduced.
Owner:DALIAN UNIV OF TECH
Cross-critical CO2 parallel compression system and capacity ratio method thereof
ActiveCN109186115AImprove efficiencyReduce energy consumptionMechanical apparatusCompression machinesProcess engineeringParallel compression
The invention discloses a cross-critical CO2 parallel compression system and a capacity ratio method thereof. The system comprises a main loop and an auxiliary loop, and the temperature of the outletof a main loop of a gas cooler is reduced to the temperature of the outlet of a main loop of a supercooling-evaporator through the evaporation effect of the auxiliary loop in the supercooling-evaporator. The system comprises three working modes, the environment temperature is minus 20 DEG C to zero DEG C in a normal operation mode, and the frequency of the auxiliary loop compressor is adjusted toensure the efficient operation of the system; the environment temperature is 0-15 DEG C in a low-frequency operation mode, when the environment temperature is high and the heating amount is large, theenergy is saved by reducing the frequency; the environment temperature is lower than minus 20 DEG C in an ultra-frequency operation mode, so that the heating amount and the running stability of the system under an extremely low environment temperature are guaranteed; and the water return temperature in the three modes ranges from 35 DEG C to 50 DEG C, and the water outlet temperature ranges from50 DEG C to 70 DEG C. In the starting process, a low-frequency starting mode of the auxiliary loop compressor is carried out when the pressure of the auxiliary loop is less than 5 MPa, and the stability of the starting operation process of the auxiliary loop is ensured.
Owner:XI AN JIAOTONG UNIV
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