74results about How to "Reduce evaporating pressure" patented technology

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.

A waste heat recovery system is for use with a power unit that includes an internal combustion engine. The waste heat recovery system includes a Rankine cycle device in which working fluid circulates through a pump, a boiler, an expander and then through a condenser, heat exchange occurs in the boiler between the working fluid and intake fluid that is introduced into the internal combustion engine while being cooled, a determination device for determining required cooling load for the intake fluid, a pressure reducing device for reducing evaporation pressure in the Rankine cycle device, and a controller for controlling the pressure reducing device so as to reduce the evaporation pressure below a predetermined evaporation pressure if the required cooling load determined by the determination device exceeds a threshold.

The invention relates to an ultra-low temperature circulation refrigeration method employing injectors. In the method, high-pressure mixed refrigerants compressed by a compressor (1) enter a condenser (2) and then enter a first gas-liquid separator (3) to realize gas and liquid phase separation, liquid refrigerants flowing out of the first gas-liquid separator (3) enter a first injector (4), gas and liquid two-phase mixed work media from an outlet of the first injector (4) are cooled by a first heat regenerator (5) and then enter a second gas-liquid separator (6) to be separated, work fluid of a second injector (8) is processed into low-pressure steam through a first throttling member (7) and a condensing evaporator (9), and the low-pressure steam is pressurized by the second injector (8), flows into the first heat regenerator (5) to be subjected to overheating and then flows back to the compressor (1); and gaseous refrigerants flowing out of the top of the first gas-liquid separator (3) flow into the condensing evaporator (9), are recooled through a second heat regenerator (10) and enter an evaporator (12) through a second throttling member (11) for refrigeration at low temperature, the ultra-low temperature can reach minus 40 DEG C to minus 170 DEG C, and the energy saving effect is good.

The invention discloses a self-cleaning control method and device for an air conditioner and belongs to the technical field of self-cleaning of air conditioners. The self-cleaning control method comprises the following steps: acquiring running parameters of a frosting stage of the air conditioner in a self-cleaning mode; when the running parameters meet preset fan starting conditions, controlling to start an internal fan; and when the running parameters meet preset fan stopping conditions, controlling to stop the internal fan. According to the self-cleaning control method, the running state of the internal fan in the frosting stage is controlled according to the preset fan starting and stopping conditions, so that not only is uniform distribution of water vapor in an indoor unit guaranteed through running of the internal fan, but also the evaporation pressure in the indoor unit is reduced through stopping the internal fan to accelerate internal temperature reduction of the indoor unit, and accordingly, the frosting efficiency of the air conditioner can be guaranteed.

A system, configured to be disposed in a information technology equipment rack for providing ice thermal storage, includes a tank configured to hold water, a heat exchanger disposed in water in the tank and configured to convey a two-phase liquid and vapor refrigerant and to transfer heat between the water and the refrigerant, a first valve connected to a liquid and a vapor refrigerant line and configured to selectively connect the liquid refrigerant line to a first port and the vapor refrigerant line to a second port in a first mode and to connect the liquid refrigerant line to the second port and the vapor refrigerant line to the first port in a second mode, a thermostatic expansion valve connected to an inlet of the heat exchanger, and a liquid / vapor pump connected to an outlet of the heat exchanger and to the second port of the first valve.

The invention discloses a vacuum dryer for a screw to convey materials and a method thereof. The dryer comprises a vacuum drying device and a controller; the controller mainly comprising PLC and an upper computer, timely controls the rotate speed of a screw and the heating power of a ten-section resistance according to the detection data of the temperature and the humidity of the materials. The invention adopts a subsectional heating and drying control strategy giving consideration to both the drying quality and the production efficiency, comprises PID and predictive control, and a drying control strategy of the heating control and the linkage of the screw rotating speed; and the drying precision can be 98.8%. The invention is characterized by drying the inflammable and explosive materials and materials easy to be decomposed at a high temperature and no-air contacted materials. Furthermore, the vacuum operation reduces the steam pressure and the temperature, improves the temperature range between heating elements and the dried materials; the screw conveying increases the drying area, is benefit to evenly heating; a mechanism of screw rotating speed linkage based on the subsectional drying control strategy can not only ensure the high quality of the dried materials but also has high production efficiency.

The present invention provides a control method for a refrigerator that can acquire a pump-down effect without performing an additional pump-down process and furthermore, efficiently utilize residual cool air remaining in a freezer evaporator.

A cooling and heating control method of a multi type air conditioner in which a target pressure of a compressor is adjusted based on conditions of respective indoor units so as to reduce power consumption is provided. The cooling control method includes determining the indoor unit desired to execute power saving control, judging whether or not a difference between a temperature of a space in which the indoor unit desired to execute power saving control is located and a set temperature of the indoor unit is less than a reference value, raising a target evaporation temperature of the indoor unit upon judging that the difference is less than the reference value, comparing an evaporation temperature of the indoor unit with the raised target evaporation temperature, and raising an evaporation pressure of a compressor, when the evaporation temperature of the indoor unit is lower than the raised target evaporation temperature.

The present invention relates to a compression / injection mixed refrigerating machine unit in the field of refrigerating technology. Said invention includes compressor, oil separator, condenser, high-pressure liquid storage device, filtering dryer, sight glass, electromagnetic valve, two-stage injector, low-pressure liquid storage device, thermal expansion valve and evaporator. Said invention also provides their connection mode and its working principle.

The invention discloses a liquid phase-change heat transfer type pumping cooling system which comprises an evaporator system (2), a liquid feeding pump (6), a condenser (5), a pipeline system and a booster pump (3). The evaporator system (2) is arranged in electrical equipment (1); the liquid feeding pump (6) is used for feeding liquid to the evaporator system (2); cooling media can evaporate in the evaporator system (2) to generate steam; the condenser (5) is used for condensing the steam exhausted from the evaporator system so as to generate single-phase liquid; the booster pump (3) is arranged in the pipeline system at an outlet of the evaporator system and is used for reducing the evaporating pressure and increasing the condensing pressure simultaneously. The evaporator system (2) can comprise one evaporator or a plurality of evaporators, each evaporator comprises heat pipes (7) and a heat exchanger (9), the evaporator system is used for dissipating heat by the evaporators to cool the electrical equipment, and the heat is generated in the electrical equipment. The liquid phase-change heat transfer type pumping cooling system has the advantage that the electrical equipment with distributed heat sources can be cooled by the cooling system efficiently.

A system, configured to be disposed in a information technology equipment rack for providing ice thermal storage, includes a tank configured to hold water, a heat exchanger disposed in water in the tank and configured to convey a two-phase liquid and vapor refrigerant and to transfer heat between the water and the refrigerant, a first valve connected to a liquid and a vapor refrigerant line and configured to selectively connect the liquid refrigerant line to a first port and the vapor refrigerant line to a second port in a first mode and to connect the liquid refrigerant line to the second port and the vapor refrigerant line to the first port in a second mode, a thermostatic expansion valve connected to an inlet of the heat exchanger, and a liquid / vapor pump connected to an outlet of the heat exchanger and to the second port of the first valve.

A clothes treating apparatus having a heat pump cycle for performing a washing cycle and a drying cycle is provided. The clothes treating apparatus may include a drum configured to accommodate a item to be treated; a heat pump cycle having a first evaporator, a compressor, a condenser, and an expansion valve to heat air introduced into the drum; a circulation duct configured to form a circulation passage of air that has passed through the drum; a circulation fan configured to circulate the air; and a controller configured to drive the heat pump cycle and the circulation fan during the washing cycle to preheat at least one of the drum or the circulation duct.

A vapor-compression refrigerant cycle device includes an ejector, a first evaporator for evaporating refrigerant flowing out of a pressure-increasing portion of the ejector, a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. In the refrigerant cycle device, a refrigerant suction pipe is connected to a refrigerant outlet of the second evaporator and the refrigerant suction port of the ejector, and the surface of the refrigerant suction pipe is covered by an insulating member. Furthermore, the ejector, the first evaporator, the second evaporator and the refrigerant suction pipe are arranged in a passenger compartment of the vehicle.

The invention provides a laterally-arranged heat pump clothes drying cabinet of a deep dehumidification device. The laterally-arranged heat pump clothes drying cabinet comprises a drying room and a refrigeration and dehumidification device. The refrigeration and dehumidification device is arranged on the side face of the drying room to form a high-position air suction and low-position air exhaust mode or a low-position air suction and high-position air exhaust mode. The drying room air inlet is provided with an air bag, and drying air flows into the drying room through through-holes formed in the air bag. The refrigeration and dehumidification device comprises a first condenser, a second condenser, a third condenser and an evaporator, wherein wet air is divided into two ways, one way of wet air flows through the first condenser and the second condenser to perform heating and temperature rise so as to obtain high-temperature drying air, the other way of wet air flows through the evaporator to perform temperature reduction and passes through the third condenser to perform heating and temperature rise so as to obtain high-temperature drying air, and two ways of drying air are input into the drying room after being mixed. By means of the refrigeration and dehumidification device, the problem that condensation pressure and condensation temperature of a traditional heat pump clothes drying machine at a speed-reduction drying phase are continuously improved, accordingly power consumption, pressure difference and compression ratio of a compressor are improved, energy efficiency ratio is reduced, the working condition is severely worsened, and even the compressor is burned down is solved.

The invention is suitable for the technical field of wind tunnel experiments, and provides an icing wind tunnel heat exchanger outlet airflow temperature control system and method, and the system comprises a compressor, a condenser, a liquid storage tank, a refrigerant shield pump, a heat exchanger, a low-pressure circulation barrel, a controller, and an upper computer. An air suction pressure sensor is arranged at the air suction end of the compressor; an inlet and an outlet of the heat exchanger are respectively provided with a liquid inlet regulating valve and an air return regulating valve; a downstream air outlet of the heat exchanger is provided with a temperature sensor, and the temperature sensor and the heat exchanger are both arranged in the icing wind tunnel; the controller is in control connection with the compressor; the upper computer is connected with the temperature sensor, the return air regulating valve and the controller; the air suction pressure sensor is directly arranged at the air suction end of the compressor, the air suction pressure of the compressor can be visually and sensitively obtained, and the problems that in the prior art, due to the large volume of a low-pressure circulation barrel, the load increasing and decreasing speed of a refrigerating system unit is low, and finally the heat exchanger outlet airflow temperature has large hysteresis quality are solved.

A solenoid switching valve is provided at a low concentration gas pipe that sends gas from a second separating film unit to a canister. A reflux pipe, that is branched-off from the low concentration gas pipe by the solenoid switching valve, merges with a medium concentration gas pipe that is from the second separating film unit, and further runs via a circulating pipe, and reaches a merge portion with a purge pipe from the canister. By switching the solenoid switching valve to the merge portion side and driving a purge pump that is provided at an exhaust pipe between the merge portion and a first separating film unit, gas, whose concentration has risen within the low concentration gas pipe, is sent to the first separating film unit, and is separated into high concentration gas HG and low concentration gas LG.

The invention relates to a control method and device for an air conditioner system, the air conditioner system and a storage medium. The control method comprises the steps that the predetermined watertemperature of the air conditioner system is monitored; and when the predetermined water temperature is less than a preset value, outdoor units, with the first starting-up number, of the air conditioner system are started, wherein the first starting-up number is greater than the second starting-up number, and the second starting-up number is the starting-up number of the outdoor units when the predetermined water temperature is greater than or equal to the preset value. By adopting the control method or device for the air conditioner system or the air conditioner system, when the predetermined water temperature of the air conditioner system is less than the preset value, the starting-up number of the outdoor units can be increased, and the heating amount of the air conditioner system is increased.

The invention relates to a spraying and falling film combined absorption tower and an absorption refrigeration system and an operation method thereof, and belongs to the technical field of waste heat utilization, the spraying and falling film combined absorption tower comprises a tower body, a falling film absorber, at least one group of solution spraying absorbers and at least one group of spraying cooling absorption pipes are arranged in the tower body, and the spraying cooling absorption pipes are partially located in the falling film absorber; outlets of the group of solution injection absorbers are connected with inlets of the group of injection cooling absorption pipes, the solution injection absorbers inject gaseous refrigerants into the injection cooling absorption pipes by utilizing external mixed solution flow, a barren liquor spray head is arranged at the top of the tower body, and barren liquor sprayed by the barren liquor spray head cools the solution injection absorbers and then enters the falling film absorber. According to the invention, the solution jet absorber, including the falling film cooling absorption pipe, and the falling film absorber are installed in the same equipment, so that the absorption rate of the absorption equipment is improved, the equipment structure is optimized, and the cost is reduced.

The invention belongs to the technical field of sample sampling, and discloses an automatic sampling device of tritium in water. The automatic sampling device comprises a mechanical part and a control part; the mechanical part comprise an evaporation unit, a condensing unit, and a collecting unit; the control part comprises a control cabinet, a control panel, a control software, a magnetic valve, a flowmeter, and a thermometer; and the automatic sampling device is used for realizing automatic operation of sample injection, distillation, condensation, and collection of samplings. The automatic sampling device is high in sampling speed and collecting speed of tritium in water, and is capable of avoiding entrainment effectively, and realizing automatic sampling.

The invention relates to a two-stage cascade enhanced-vapor-injection low-temperature refrigerating system and belongs to the field of low-temperature storage. The two-stage cascade enhanced-vapor-injection low-temperature refrigerating system comprises a compressor, a first oil separator, a bipolar condenser, a first drying filter, a first capillary tube, an intermediate heat exchanger, a second oil separator, a second drying filter, a throttle valve, a plate heat exchanger, a second capillary tube, an evaporator and an enhanced-vapor-injection compressor. According to the two-stage cascade enhanced-vapor-injection low-temperature refrigerating system, a high-temperature-stage refrigerant and a low-temperature-stage refrigerant operate separately, a gas-liquid separator is omitted, it is not necessary to empty the refrigerants during later maintenance, the start-stop ratio of the system is lowered while the cost is saved, the service life of a unit is prolonged, and the operating stability of the system is improved; supercooling of the high-temperature refrigerant is achieved by winding the first capillary tube around a first gas return tube and supercooling of the low-temperature refrigerant is achieved by winding the second capillary tube around a second gas return tube for lowering the evaporation pressure of the low-temperature refrigerant; and by using the four-row-tube-bundle finned tube type condenser, condensation of the high-temperature refrigerant and precooling of the low-temperature refrigerant are achieved, two-stage independent operation is achieved, and the heat load of the intermediate heat exchanger is reduced.

A method for controlling a refrigerator includes driving a compressor, operating a switching valve to allow a refrigerant to flow into at least one main expansion valve, opening a cool air passage connecting a refrigerating compartment to a main evaporator to cool the refrigerating compartment, operating the switching valve to switching a flow direction of the refrigerant into at least one deep-freezing expansion valve when a temperature of the refrigerating compartment is cooled to a temperature lower than a set temperature, thereby cooling the deep-freezing storage chamber, and operating the heater.

The invention discloses a high-temperature composite phase-change heat storage material with a multi-core-shell structure, and a preparation method and application thereof, belonging to the technicalfield of heat storage materials. According to the invention, zinc-aluminum alloy powder Zn-Al serves as an inner core, carbon nanotubes CNTs serve as a first shell layer, and the zinc-aluminum alloy powder Zn-Al wrapped by the carbon nanotubes CNTs is synthesized through a hydrothermal method and has a structure of Zn-Al@CNTs; then, the Zn-Al@CNTs are added into a tetraethoxysilane-lanthanum saltmixed solution through a coprecipitation method, reaction is performed under the condition of adjusting the pH value of the solution, and then roasting is carried out; and after packaging, casting molding and normal-temperature hardening, the heat storage material with La2O3-SiO2 as a second shell layer is formed, and the structure of the heat storage material is La2O3-SiO2-(Zn-Al@CNTs). The heatstorage material can effectively and reasonably store excess heat in the pyrolysis and gasification process of garbage, and meets the requirement for heat needed by subsequent pollutant removal aftergarbage pyrolysis and gasification.

A cooling and heating control method of a multi type air conditioner in which a target pressure of a compressor is adjusted based on conditions of respective indoor units so as to reduce power consumption is provided. The cooling control method includes determining the indoor unit desired to execute power saving control, judging whether or not a difference between a temperature of a space in which the indoor unit desired to execute power saving control is located and a set temperature of the indoor unit is less than a reference value, raising a target evaporation temperature of the indoor unit upon judging that the difference is less than the reference value, comparing an evaporation temperature of the indoor unit with the raised target evaporation temperature, and raising an evaporation pressure of a compressor, when the evaporation temperature of the indoor unit is lower than the raised target evaporation temperature.

A refrigerating device. A heat exchanger (45) for air conditioning, in which indoor cooling and heating are switched between each other, is provided only in a high-stage-side refrigerant circuit (8). On the other hand, heat exchangers (47a, 47b, 49) for cooling, which cool inside a cold storage, are provided only in a low-stage-side refrigerant circuit (9).

The invention relates to a double-chamber vortex generator used in a single-effect solar absorption refrigeration system, belonging to the refrigeration technical field. The double-chamber vortex generator comprises a low pressure generating chamber and a high pressure generating chamber. After fluid is heated to a certain temperature by an external heat source, the fluid enters the generator through a nozzle which is in tangency with the low pressure generating chamber to generate rotational flow motion, so as to effectively reduce the evaporation pressure and the evaporation temperature of solution in the generator, improve utilizable temperature difference of the heat source and increase condensing vapor used for refrigeration cycle. The double-chamber vortex generator has the advantages that: the double-chamber vortex generator has a simple structure, no moving element, low cost, high efficiency, energy conservation and environmental protection, and can effectively utilize low-level energy source (such as solar energy, geothermal energy and tide energy) as drive heat source of the generator.

The invention relates to a jet refrigeration system driven by waste heat of a refrigerated vehicle with double evaporators, comprising a waste heat recovery device, a circulation pump, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first jet device, second ejector, condenser, and gas flow control device; the first ejector and the second ejector inject refrigerants of different temperatures from the first evaporator and the second evaporator respectively; the refrigerant in the first evaporator The temperature of the refrigerant in the second evaporator can be controlled above zero, which is used for the summer cooling of the cab of the refrigerated truck; through the control of the gas flow control device, the refrigeration in the second evaporator can be changed. The temperature and flow direction of the agent can be used to realize the heating of the cab of the refrigerated truck in winter. The invention can make full use of the waste heat of the automobile to realize the whole process of refrigerating the refrigerated vehicle, and at the same time meet the air-conditioning requirements of the driver's cab, thereby broadening the application field of the jet refrigeration system.

The invention discloses a waste-heat-drive drainage and injection type refrigerating system for a refrigerator car. The waste-heat-drive drainage and injection type refrigerating system comprises a car waste heat recovery device. Waste heat of the car waste heat recovery device passes through a first injector and enters secondary flow of a second injector. An output opening of the second injector is connected with a condenser. Meanwhile, a strand of fluid is led out from the secondary flow of the second injector and exchanges heat with the fluid led out from the condenser in a heat exchanger, so that the fluid led out from the secondary flow of the second injector is changed into a liquid state from a gas state. The liquid fluid is divided into three ways, wherein one way of fluid flows into the heat exchanger to exchange heat with the fluid led out from the secondary flow of the second injector and is changed into the gas state from the liquid state or changed into the gas-liquid two-phase state to flow into the car waste heat recovery device so as to preheat the car waste heat recovery device, another way of fluid flows into secondary flow of the first injector, and the third way of fluid flows into the car waste heat recovery device. By means of the waste-heat-drive drainage and injection type refrigerating system for the refrigerator car, refrigeration of the refrigerator car is achieved through waste heat drive of the car, no extra fuel needs to be consumed, and energy conservation of the refrigerator car is achieved.

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.