65results about How to "Avoid oil shortage" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.