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65results about How to "Avoid oil shortage" patented technology
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Control method of air conditioner, air conditioner and storage medium
ActiveCN107062564AIncrease oil returnExtend your lifeMechanical apparatusSpace heating and ventilation safety systemsLife timeControl theory
The invention provides a control method of an air conditioner, the air conditioner and a storage medium. The control method of the air conditioner is mainly used for startup of a compressor in a low-temperature environment, and when detection shows that the outdoor environment temperature is lower than a preset temperature, the compressor is started and enters the following logics that the exhaust superheat degree of the compressor is detected every first preset duration, an outdoor fan is controlled to operate by a second preset duration when the exhaust superheat degree is lower than a preset threshold value and the exhaust pressure of the compressor is higher than a first preset pressure threshold value, the control logic is stopped when detection shows that the operation time of the compressor reaches a third preset duration, and the air conditioner operates normally for refrigeration. By means of the control method of the air conditioner, the compressor can keep the exhaust superheat degree all the time after being started, the situation that too much refrigeration oil is dissolved when a gaseous refrigerant is quickly condensed into a liquid refrigerant, and consequently oil starvation of an air conditioner system is caused is avoided, the oil return amount of the compressor in case of low-temperature start is improved, and the service life of the compressor is prolonged.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Injection oil return control method and device for air-conditioning system and air-conditioning system
ActiveCN105180541AGuaranteed uptimeAvoid oil shortageRefrigeration safety arrangementSolenoid valveAir conditioning
The invention discloses an injection oil return control method and device for an air-conditioning system and the air-conditioning system. The injection oil return control method comprises the steps that when it is detected that an injection oil return electromagnetic valve is closed, the oil return operating time of a compressor is kept from zero, and the exhaust superheat degree of an exhaust pipe is calculated continuously; if first preset conditions are met, the injection oil return electromagnetic valve is controlled to be opened, and the first preset conditions include that the compressor is at least started for a preset time, the accumulated oil return operating time of the compressor exceeds a second preset time, and the exhaust superheat degree of the exhaust pipe at least reaches a first preset numerical value after operation lasts for a third preset time; and when it is detected that the compressor is stopped or the injection oil return electromagnetic valve is kept open for a fourth preset time, the injection oil return electromagnetic valve is controlled to be closed. By the adoption of the technical scheme, refrigeration oil can be recovered into the compressor in time, the situation that too much refrigerant liquid is brought into the compressor, and consequentially liquid impact of the compressor is caused can also be avoided, and thus the reliability and safety of injection oil return can be improved.
Owner:GREE ELECTRIC APPLIANCES INC
Multi-online system and low-temperature startup control method and device of multi-online system
ActiveCN107560259AAvoid oil shortageImprove reliabilityRefrigeration safety arrangementElectrical and Electronics engineeringEngineering
The invention discloses a multi-online system and a low-temperature startup control method and device of the multi-online system. The multi-online system comprises an outdoor unit and at least one indoor unit, wherein the outdoor unit is connected with the indoor units through tubing, and the outdoor unit comprises a compressor. The low-temperature startup control method comprises the following steps that when the multi-online system is controlled to conduct low-temperature startup, the maximum length of tubing between the outdoor unit and at least one indoor unit is acquired; the compressor is controlled to work for N periods of preset time according to N preset frequencies in sequence; and after the compressor works for the Nth period of preset time according to the Nth preset frequency,the frequency boost speed is determined according to the maximum length of tubing, and the operation frequency of the compressor is controlled to be increased to the target operation frequency from the Nth preset frequency at the frequency boost speed, wherein the N is a positive integer. As a result, the oil quantity of the compressor can be guaranteed in the low-temperature startup process, thecompressor is prevented from lacking oil, the requirement of heating on the indoor side is met, and the user experience is improved.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Heavy-calibre oil collection tube radiator for transformer
InactiveCN102034590AHigh trafficReduce pressure lossTransformers/inductances coolingTransformerHeat conducting
The invention discloses a heavy-calibre oil collection tube radiator for a transformer, belonging to the technical field of transformer accessories. The heavy-calibre oil collection tube radiator comprises a radiator body comprising an oil collection tube, an oil return tube and a group of cooling fins, wherein the cooling fins are gathered between the oil collection tube and the oil return tube and are matched with the oil collection tube and the oil return tube, and the diameter of the oil collection tube and the diameter of the oil return tube are respectively 114mm. By utilizing the heavy-calibre oil collection tube radiator provided by the invention, heat-conducting oil can fully enter each cooling fin conveniently, the phenomenon of oil lack is avoided, and the radiation effect is improved; the friction force between the heat-conducting oil and a tube wall is reduced, thus the operation heat of the heat-conducting oil is reduced; the diameter of the oil return tube is enlarged to increase the flow of oil, thus the amount of oil passing through the radiator within unit time is increased, and the radiation effect is more ideal; and after the diameter of the oil collection tube is enlarged, the pressure loss of oil is reduced so as to save the oil pump motor power.
Owner:CHANGSHU YOUBANG RADIATOR
Air conditioner starting control method, air conditioner and storage medium
ActiveCN110375411AAvoid oil shortageFast oil returnMechanical apparatusSpace heating and ventilation safety systemsThree stageEngineering
The invention discloses an air conditioner starting control method, an air conditioner and a storage medium. The method comprises the following steps that a first environment temperature, a second environment temperature, a compressor exhaust temperature and a set temperature input by a user are obtained, and a preset three-stage low-temperature starting mode is operated according to the first environment temperature, the second environment temperature, the compressor exhaust temperature and the set temperature, so that the refrigeration oil is accelerated to return to a compressor and / or theamount of refrigeration oil flowing out of the compressor is reduced. Under the condition that the air conditioner is started at the low temperature, the refrigeration oil in a unit is effectively returned to the compressor through the mode, so that the operation reliability of the air conditioner is improved.
Owner:GUANGDONG TCL INTELLIGENT HEATING & VENTILATING EQUIP CO LTD
Electronic cigarette with good smoking effect
InactiveCN106376978APrevent flowPrevention of dry burningTobacco devicesMouth pieceActivated carbon filtration
The invention discloses an electronic cigarette with a good smoking effect. The electronic cigarette comprises an atomizer, a sleeve and a cigarette holder, wherein the atomizer is internally provided with an oil storage cavity and a heating device; the oil storage cavity is internally and horizontally provided with an air suction tube; a plurality of first circular rings are fixedly connected with an outer side wall of the air suction tube; an inner side wall of the oil storage cavity is fixedly connected with a second circular ring; the sleeve is arranged on the right side of the atomizer; the sleeve is in thread connection with the atomizer; an air outlet tube is arranged in the sleeve; a corrugated tube is arranged in the air outlet tube; the right side of the air outlet tube is communicated with the cigarette holder; the cigarette holder is in thread connection with the air outlet tube; an active carbon filter screen is embedded into the left end of the cigarette holder; an inserting slot is formed in the right side of the active carbon filter screen; and a filtering cotton core is inserted into the inserting slot. The electronic cigarette provided by the invention is simple in structure and reasonable in design, can bring more intensive pleasant sensation and satisfaction sensation to users, and can also be used for filtering smoke; and meanwhile, the atomizer is prevented from being burnt without water and the service life of the electronic cigarette is prolonged.
Owner:ZHENGZHOU YOUAI NETWORK TECH CO LTD
Double-compressor parallel-screw flooded-type water chilling unit system
InactiveCN101762107AAvoid oil shortageCompression machines with non-reversible cycleUnit systemPulp and paper industry
The invention provides a double-compressor parallel-screw flooded-type water chilling unit system, which comprises two compressors, an oil separator, an evaporator and a condenser, wherein the two compressors include a first and a second compressor; two air inlet ends of the oil separator are respectively and correspondingly connected to the air outlet ends of the two compressors and two oil outlet ends of the two compressors are respectively and correspondingly connected to the oil inlet ends of the two compressors; the evaporator is communicated with the respective suction end of the two compressors; and one end of the condenser is communicated with the air outlet ends of the oil separator and the other end is communicated with the evaporator. Especially, an oil sink high-level interface of the first compressor is communicated with the suction end of the second compressor, and the oil sink high-level interface of the second compressor is communicated with the suction end of the first compressor.
Owner:GREE ELECTRIC APPLIANCES INC
Dredging type oil mist sealing method
The invention discloses a dredging type oil mist sealing method. The method solves the problems that in the prior art, oil mist greatly overflows in clearance type sealing, abrasion and heating are likely to happen in contact sealing, forcefully discharged oil mist is hardly balanced with oil groove air pressure, and sealing fails. The dredging type oil mist sealing method includes the following steps that firstly, an oil groove is provided with an oil mist sealing device, the oil mist sealing device comprises a sealing cover, an oil collection tank, an oil suction pipe and a sealing cover oil overflow pipe, the sealing face of the sealing cover is provided with threaded tooth structures with the rotating direction opposite to the rotating direction of a rotating shaft, and a clearances exist between the threaded tooth structures and the rotating shaft; secondly, when a unit rotates, oil gas existing on the sealing face is pressed into an oil groove oil overflow pipe or a sealing inter-tooth oil overflow pipe through cooperation of fluid viscosity, the unit rotating direction and the threaded tooth rotating direction and is led into the oil collection tank; and thirdly, after the unit is stopped, lubricating oil in the oil collection tank is sucked back into the oil groove by an oil suction pump through the oil suction pipe, and oil shortage of a bearing when the unit is started is avoided.
Owner:四川白合轴承技术有限公司
Central air conditioner and controlling method thereof
InactiveCN1752669AAvoid damagePrevent problems such as malfunctionSpace heating and ventilation safety systemsSpace heating and ventilation control systemsFour-way valveEngineering
The present invention relates to a kind of central air conditioner and its control method. It includes the following several portions: compressor, oil distributor, four-way valve, outdoor heat exchanger, indoor heat exchanger, expansion value, oil-returning pipe and oil circuit switchover device. Said invention also provides the concrete steps of its control method.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Oil return control method for refrigerating system
ActiveCN104422217AReduce wear and tearTimely oil return operationRefrigeration safety arrangementLiquid temperatureEngineering
The invention discloses an oil return control method for a refrigerating system. The oil return control method comprises the steps of: 1) setting a first preset liquid level, a second preset liquid level, a first preset temperature and a second preset temperature, wherein the second preset liquid level is higher than the first preset liquid level, and the second preset temperature is higher than the first preset temperature; 2) detecting liquid level in an oil return device and comparing the detected liquid level with the first preset liquid level, when the detected is lower than the first preset liquid level, opening a gas return port and a liquid inlet port; detecting the liquid temperature inside the oil return device and comparing the detected liquid temperature with the first preset temperature, when the detected liquid temperature is lower than the first preset temperature, starting heating and opening the gas return port; 3) when the detected temperature is not lower than the second preset temperature and the detected liquid level is not lower than the second preset liquid level, entering the next step; 4) closing the liquid inlet port, opening an oil return port for returning oil, and when the detected liquid level is lower than the first preset liquid level, entering the step 2). According to the oil return control method for the refrigerating system, the phenomenon of oil shortage on the system is avoided, the components wear is reduced, and the service life is prolonged.
Owner:GREE ELECTRIC APPLIANCES INC
Oil pump and control method thereof
ActiveCN111322673AAvoid oil shortageCompressorSpace heating and ventilation detailsEvaporatorEngineering
The invention discloses an oil pump and a control method thereof. The oil pump comprises a compressor, a water tank heat exchanger, a flash evaporator and an evaporator which are sequentially connected in series to form a loop, the flash evaporator is provided with a liquid inlet, an air supplementing outlet and a liquid outlet, the liquid inlet is connected with the water tank heat exchanger, theliquid outlet is connected with the evaporator; and the compressor is provided with an air supplementing inlet, the air supplementing inlet is connected with the air supplementing outlet through an enthalpy increasing pipe, an oil supplementing outlet is formed in the lower end of the side wall of the flash evaporator, and the oil supplementing outlet is connected with the air supplementing inletthrough an oil return pipe. According to the oil pump and the control method thereof, due to the fact that the pressure in the flash evaporator is higher than the pressure in the compressor, in the presence of the pressure difference between the flash evaporator and the compressor, oil in the flash evaporator can sequentially pass through the oil return pipe and the air supplementing inlet and then enter the compressor to supplement oil to the compressor, so that the oil shortage phenomenon of the compressor during operation in a low-water-temperature environment is avoided.
Owner:广东TCL智能暖通设备有限公司
Heat pump system
PendingCN105546861AGuaranteed to workGuaranteed oil return speedCompressorMechanical apparatusEngineeringControl valves
The invention discloses a heat pump system. The heat pump system comprises a compressor and an oil separator and further comprises a first oil returning pipeline and a second oil returning pipeline; the first oil returning pipeline is connected between the oil separator and a cylinder number switching opening of the compressor, and a first control valve is arranged on the first oil returning pipeline; the second oil returning pipeline is connected between the cylinder number switching opening of the compressor and an air suction opening of the compressor, and a second control valve is arranged on the second oil returning pipeline; and a third oil returning pipeline is connected between an outlet of the first control valve and the air suction opening of the compressor, and a pressure control unit for controlling pressure at the outlet of the first control valve is arranged on the third oil returning pipeline. According to the heat pump system, the problem that in the prior art, a heat pump system cannot carry out continuous oil returning during three-cylinder running high capacity output, and consequently, oil starvation appears in the compressor is solved.
Owner:GREE ELECTRIC APPLIANCES INC
High pressure injection oil return automobile air conditioner
The invention relates to an automobile air conditioner, in particular to a high pressure injection oil return automobile air conditioner, which comprises an injector, a compressor, a solenoid valve, a first oil collecting bag, a condenser, a second oil collecting bag, an evaporator and an expansion valve, and is characterized in that: the compressor, the condenser, the expansion valve and the evaporator are in closed-loop connection in turn; the first oil collecting bag is arranged at the lowest point of the evaporator; and the second oil collecting bag is arranged at the lowest point of the condenser. The high pressure injection oil return automobile air conditioner has the advantages that: lubricating oil is brought back to the compressor through the high pressure of the condenser, and the oil lack of the compressor is prevented; and the high pressure injection oil return automobile air conditioner is easy to control, reliable in operation, easy to mount and suitable for production operation.
Owner:林勇
Air conditioner control system and air conditioner using ejector
ActiveCN106225291BGuaranteed reliabilityPrevent oil rushMechanical apparatusFluid circulation arrangementVapor–liquid separatorControl system
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
Air conditioner control system using ejector and air conditioner
ActiveCN106225291AGuaranteed reliabilityPrevent oil rushMechanical apparatusFluid circulation arrangementVapor–liquid separatorLiquid state
The invention provides an air conditioner control system using an ejector and an air conditioner. The system comprises a compressor, a gas-liquid separator, a first heat exchanger, the ejector and a starting / closing device; the starting / closing device is connected between an outlet of the ejector and a liquid pipe of the first heat exchanger; a gas pipe of the first heat exchanger and a gas sucking port of the compressor are respectively connected with an inlet and an outlet of the gas-liquid separator; an exhaust port of the compressor is connected with a first inlet of the ejector; a bottom port of the gas-liquid separator is connected with a second inlet of the ejector; after the air conditioning system is started, the starting / closing device is opened; high-pressure gas exhausted from the compressor flows to the ejector to drive a liquid-state refrigerant in the gas-liquid separator to flow to the ejector for mixing with high-pressure gas to form a mixed refrigerant; and the mixed refrigerant flows into the first heat exchanger to convert as a gas-state refrigerant with the liquid-state refrigerant in the first heat exchanger. The gas-state refrigerant cannot hydraulically shock the compressor to prevent the oil overflowing phenomenon of the compressor without generating oil shortage and no oil of the compressor, so that the reliability of the compressor is guaranteed.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
Control method and device of multi-split air conditioning system
ActiveCN111503851AAvoid oil shortageImplement the control methodMechanical apparatusSpace heating and ventilation safety systemsVapor–liquid separatorWorking environment
The invention discloses a control method and device of a multi-split air conditioning system. The control method comprises the steps that when the current work environment temperature of the multi-split air conditioning system is larger than the temperature threshold value, whether work states of N inner units meet the preset state or not is detected; if yes, the continuous duration when the N inner units are in the preset state can be recorded; and when the continuous duration is larger than or equal to the first duration threshold, M inner units, in the heating standby state, in the N innerunits are adjusted to be in the refrigeration standby states, and the state continues for the second duration, wherein M is an integer smaller than N. According to the control method, under some particular running conditions, refrigerants, containing a large amount of oil, in the inner units are discharged into a gas and liquid separator, and oil lacking conditions of a compressor can be effectively avoided.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Automotive air conditioning motor-driven oil return device
InactiveCN102353182ASimple controlReliable operationCompressorRefrigeration safety arrangementEvaporatorMotor drive
The invention relates to an automotive air conditioning oil return device, and in particular relates to an automotive air conditioning motor-driven oil return device comprising a compressor exhaust pipe, a compressor, a compressor return pipe, a liquid pump exhaust pipe, a liquid pump, a liquid pump suction pipe, a controller, an oil collecting bag, a liquid level sensor and an evaporator pipeline, wherein the oil collecting bag is arranged at the lowest point of the evaporator pipeline; the liquid pump exhaust pipe of the liquid pump is connected with a crank case of the compressor; and the liquid pump suction pipe is connected with the bottom of the oil collecting bag. The automotive air conditioning oil return device has the advantages that the liquid pump is utilized to pump lubricants back to the compressor so as to prevent the oil starvation of the compressor; the control is easy and the running is reliable; and the installation is simple and the production operation is easy.
Owner:林勇
Oil supply device and scroll compressor
PendingCN107559203AEasy to storeEasy to pumpRotary piston pumpsRotary piston liquid enginesReturn channelLubrication
The invention provides an oil supply device and a scroll compressor. The oil supply device comprises an oil storer, a valve and an oil pump, wherein the oil storer is provided with an oil storage cavity; the oil storer is provided with an oil outlet channel, an oil return channel and an oil feeding channel, which all communicate with the oil storage cavity; the oil feeding channel is opened or closed by the valve; and the oil pump is connected with the oil outlet channel. The oil supply device can achieve the stable oil supply effect in various states of the scroll compressor, prevents oil shortage of the compressor, realizes effective oil supply lubrication of each friction of the compressor, and improves the reliability of the scroll compressor and the performances of an air conditioner.
Owner:ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
Thrust surface friction diminishing device for vane type compressor
InactiveCN1704605AImprove reliabilityImprove performanceRotary/oscillating piston pump componentsLiquid fuel engine componentsInterior spaceEngineering
This invention relates to a thrust surface friction reducing device of vane-type compressor. The vane-type compressor comprises cylinder, rotating shaft, several shaft bearing plates, several blades, wherein the cylinder has an inner space with upper and lower openings, and the several shaft bearing plates are connected with the openings separately; the rotating shaft comprises axle, bearing part and wiper part, wherein the axle is go through the shaft bearing plate, and inside the axle it forms oil channel; the bearing part is axially supported by the shaft bearing plate, the wiper part is formed in the outer surface of the bearing part; several blades press in the upper and lower laterals of the wiper part, changing the inner space to sucking area and compressing area; the bearing part forms oil channel axially, the oil will be sucked by the oil channel of the rotating shaft, one part of which will be guided to the lower thrust surface with the largest load.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Air-liquid separator used for air conditioner
The invention provides an air-liquid separator used for an air conditioner, which comprises a barrel body, an air inlet pipe and an air outlet pipe provided with a U-shaped pipe, wherein the U-shaped pipe is arranged on the outer side of the barrel body; an equalizing pipe is arranged between the air outlet pipe and the barrel body; and at least two oil return holes are formed in the air outlet pipe. According to the air-liquid separator used for the air conditioner, a reasonable structure design enables the external size of the air-liquid separator to be miniaturized; and meanwhile, the long-term heating operation of the air conditioner under the low-temperature operating condition is effectively guaranteed, refrigerant oil can smoothly and completely flow back to a compressor, and the reliability and the stability of the operation of the compressor are enhanced.
Owner:QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
Blade hoisting tool and hydraulic system thereof
ActiveCN112010162AAvoid followingAvoid oil shortageFluid-pressure actuator safetyServomotor componentsHydraulic pressureOil supply
The invention provides a blade hoisting tool and a hydraulic system thereof. The hydraulic system includes a driving unit, a first pressure maintaining unit, a second pressure maintaining unit, a first valve unit and a second valve unit; the driving unit drives hydraulic oil in a hydraulic system to form oil supply paths and oil return paths and supplies oil to oil cylinders through an oil supplypath or releasing the hydraulic oil of the oil cylinders through an oil return path, and the oil cylinders include a first oil cylinder with a first small cavity and a first large cavity and a secondoil cylinder with a second small cavity and a second large cavity; the first pressure maintaining unit is connected between the first oil cylinder and the driving unit so as to enable the first oil cylinder to supply and return the oil; the second pressure maintaining unit is connected between the second oil cylinder and the driving unit so as to enable the second oil cylinder to supply and returnthe oil; the first valve unit is arranged on a common path of the oil supply path and the oil return path of the first oil cylinder, and the second valve unit is arranged on a common path of the oilsupply path and the oil return path of the second oil cylinder; and the first oil cylinder and the second oil cylinder stretch out and draw back asynchronously to drive a pitching rotating mechanism to rotate, so that blades can perform pitching rotation.
Owner:JIANGSU GOLDWIND SCI & TECH CO LTD +1
Automatic oil return device of refrigeration system
The invention relates to an oil return device of a refrigeration system, and particularly to an automatic oil return device of the refrigeration system. The automatic oil return device comprises an exhaust pipe, a compressor, an air suction pipe, an oil storage elbow, lubricating oil, an oil return pipe, an oil collection bag outlet pipe, an oil collection bag, and an oil collection bag inlet pipe, wherein the compressor is connected with a condenser, an expansion valve, an evaporator and the oil storage elbow sequentially in a closed loop; and the oil collection bag is arranged at the lowest point of the evaporator. The automatic oil return device of the refrigeration system has the advantages of preventing damage of the compressor due to oil starvation as return air of the compressor is utilized to take the lubricating oil back to the compressor, and being simple to control and install, reliable to run, and easy in productive operation.
Owner:林勇
Parallel-connection compressor oil way system and refrigerating unit
ActiveCN103673397AAvoid oil shortageStable jobCompressorMechanical apparatusVapor–liquid separatorPetroleum engineering
The invention discloses a parallel-connection compressor oil way system and a refrigerating unit. The parallel-connection compressor oil way system comprises a first compressor, a second compressor, a first oil separator connected with the first compressor, a second oil separator connected with the second compressor, and a gas-liquid separator connected with the first oil separator to receive lubricating oil separated from the first oil separator. The gas-liquid separator is connected with the first compressor through a first gas suction pipe and connected with the second compressor through a second gas suction pipe, the oil sucking position of the first gas suction pipe in the gas-liquid separator is not lower than the oil sucking position of the second gas suction pipe in the gas-liquid separator, and the second oil separator is connected with the first gas suction pipe. According to the parallel-connection compressor oil way system, the first compressor and the second compressor can obtain enough lubricating oil and can stably work.
Owner:HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
Ejection system, oil return system of water chilling unit, control method and water chilling unit
The invention provides an ejection system, an oil return system of a water chilling unit, a control method and the water chilling unit, and relates to the technical field of oil return control. The ejection system comprises a first ejector, wherein the first ejector is provided with a first high-pressure inlet, a first mixing inlet and a first outlet, the first high-pressure inlet is used for introducing high-pressure gaseous refrigerant, and the first mixing inlet is used for introducing oil and liquid refrigerant mixed liquid; the first outlet is communicated with an oil tank through a firstbranch, and a first electromagnetic valve is arranged on the first branch; the first outlet is communicated with an air suction port of the compressor through a second branch, and a second electromagnetic valve is arranged on the second branch. When the guide vane opening degree is large and the impeller air suction capacity is high, the first electromagnetic valve is controlled to be opened to enable the first branch to be communicated, the second electromagnetic valve is controlled to be closed to enable the second branch to be disconnected, oil ejected by the first ejector directly entersthe oil tank and cannot be taken away by airflow at an air suction port of the compressor, and the oil shortage phenomenon of the oil tank is avoided.
Owner:GREE ELECTRIC APPLIANCES INC
Oil injection device of ketone-benzene drum filter and automatic oil replenishing machine of oil injection device
The invention relates to an oil injection device of a ketone-benzene drum filter and an automatic oil replenishing machine of the oil injection device. The oil injection device of the ketone-benzene drum filter comprises an oil injector. The automatic oil replenishing machine is arranged on the outer portion of the oil injector and comprises an oil tank and a liquid level control device. The oil tank is used for injecting oil into the oil injector and is communicated with the oil injector by a communicating pipe, the communicating pipe is lower than a set oil level, an oil inlet is formed in the oil tank, and the liquid level control device is used for controlling opening and closing of the oil inlet, so that an internal liquid level of the oil tank is positioned at the set oil level. The oil injection device and the automatic oil replenishing machine have the advantages that the internal oil level of the oil injector can be automatically controlled, so that oil in the oil injector can be positioned at the set liquid level, labor can be saved, and oil overflow or oil starvation phenomena can be prevented.
Owner:CHINA PETROLEUM & CHEM CORP +1
Air conditioner control method and device, air conditioner and storage medium
PendingCN113124537AGuaranteed uptimeExtend cooling run timeMechanical apparatusSpace heating and ventilation safety systemsFour-way valveEngineering
The invention relates to an air conditioner control method and device, an air conditioner and a storage medium. The method comprises the following steps that 1, when it is detected that the air conditioner starts heating, the current environment temperature is obtained; 2, if it is determined that the air conditioner is in a low-temperature environment according to the current environment temperature, whether the air conditioner meets the four-way valve reversing delay condition or not is judged; and 3, when it is determined that the air conditioner meets the four-way valve delayed reversing condition, a four-way valve is controlled to conduct delayed reversing, and after the four-way valve conducts reversing, the air conditioner operates in a heating mode. By the adoption of the method, when the air conditioner starts heating in the low-temperature environment, the four-way valve is controlled to delay reversing to prolong the refrigeration operation time, so that the evaporation pressure is improved, the condensation pressure is reduced, the compression ratio in a compressor is reduced, the refrigerant circulation amount and lubricating oil flowing away along with a refrigerant are reduced, the problem of oil shortage of the compressor is solved. Other parts do not need to be added, so that the loss of the compressor is reduced while the development cost of the air conditioner is reduced, and the stable operation of the air conditioner is ensured.
Owner:GREE ELECTRIC APPLIANCES INC
A multi-connection machine heat oil return control method and a multi-connection air conditioner
ActiveCN109357440BAvoid oil shortageDoes not affect working statusCompressorMechanical apparatusThermodynamicsControl theory
Owner:NINGBO AUX ELECTRIC +1
Control method and device for multi-connected air conditioning system
ActiveCN111503851BAvoid oil shortageImplement the control methodMechanical apparatusSpace heating and ventilation safety systemsVapor–liquid separatorWorking environment
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Self-oil return device for vehicle air conditioner
InactiveCN102393103AAvoid oil shortageEasy to controlCompressorClosed loopAutomobile air conditioning
The invention relates to an oil return device for a vehicle air conditioner, in particular to a self-oil return device for the vehicle air conditioner. The self-oil return device comprises an exhaust pipe, a compressor, an air suction pipe, an oil loop, lubricating oil, an oil return pipe, an oil collecting bag outlet pipe, an oil collecting bag and an oil collecting bag inlet pipe. The self-oil return device is characterized in that: the compressor is successively connected to a condenser, an expansion valve, an evaporator and the oil loop in a closed loop manner, and the oil collecting bag is installed at the lowest position of the evaporator. The self-oil return device has the advantages that: air return of the compressor is utilized, the lubricating oil is brought back to the compressor, damage due to fuel starvation of the compressor can be prevented, control is simple, operation is reliable, installation is simple, and production and operation are convenient.
Owner:林勇
Oil return control method and device for air-conditioning system and air-conditioning system
ActiveCN105180541BGuaranteed uptimeAvoid oil shortageRefrigeration safety arrangementSolenoid valveAir conditioning
The invention discloses an air-conditioning system injection return oil control method and device and an air-conditioning system. The method includes: when it is detected that the injection oil return solenoid valve is closed, timing the oil return operation time of the compressor from zero, and continuously calculating the exhaust superheat degree of the exhaust pipe; if the first preset condition is met, controlling the injection return operation time The oil solenoid valve is turned on; the first preset condition includes that the compressor has been turned on for at least the first preset time, the accumulative operating time of the oil return of the compressor exceeds the second preset time, and the discharge superheat degree reaches at least the second preset time for the third preset time. A preset value; when it is detected that the compressor is turned off or the injection oil return electromagnetic valve is continuously opened for a fourth preset time, the injection oil return electromagnetic valve is controlled to close. Adopting the technical solution provided by the present invention can not only recover the refrigeration oil to the compressor in time, but also avoid bringing more refrigerant liquid to the compressor to cause liquid shock in the compressor, thereby improving the reliability and safety of injecting and returning oil sex.
Owner:GREE ELECTRIC APPLIANCES INC
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