62results about How to "Improve oil return efficiency" patented technology

The invention discloses an oil-returning control method and an oil-returning device for a compressor as well as an air conditioner. The air conditioner comprises the compressor, an oil separator, an oil-returning pipeline and a controller, wherein an inlet of the oil separator is connected with an exhaust port of the compressor and receives gas-oil mixtures exhausted by the compressor for separation; the oil-returning pipeline is connected between an oil outlet of the oil separator and the compressor and returns oil separated by the oil separator to the compressor; a plurality of throttling pipelines are arranged in the oil-returning pipeline and in parallel connection; and the controller is used for regulating the working frequencies of the compressor and carrying on gate control on the throttling pipelines according to the working frequencies of the compressor. According to the oil-returning control method and the oil-returning device for the compressor as well as the air conditioner, a plurality of throttling pipelines are arranged in parallel in the oil-returning pipeline of the compressor, and gate control on each oil-returning pipeline is carried on according to different working frequencies of the compressor, so that the compressor can be guaranteed to return oil normally in various working conditions, and the oil-returning amount is guaranteed.

The invention discloses a transcritical carbon dioxide heat pump device, comprising a compressor, a high-pressure oil separator, a gas cooler, a heat regenerator, a throttling gear, an air cooling evaporator, and a gas-liquid separator connected in a carbon dioxide circulation pipeline in sequence according to a flow direction of carbon dioxide. A hand valve A, a filter A, and a solenoid valve A are connected between the heat regenerator and the throttling gear in sequence through a pipeline. A hand valve B and a filter B are connected between the gas-liquid separator and the compressor in sequence through a pipeline. The device is characterized in that a carbon dioxide outlet pipeline position in the gas-liquid separator is provided with an oil return hole. A solenoid valve B, a capillary tube, a filter C, a hand valve C, an oil storage tank, and an oil level controller are connected between the an oil outlet of the high-pressure oil separator 2 and an oil inlet of the compressor in sequence through a pipeline. The product has functions of low pressure liquid storage, defrosting, and backheating, and operation of a unit in low temperature environment is safer, more reliable, and more efficient.

The invention relates to the technical field of air conditioning equipment, in particular to a flooded evaporator oil return system and a water-cooled air conditioning unit adopting the flooded evaporator oil return system. The flooded evaporator oil return system comprises an oil and refrigerant mixed liquid recovery pipeline, a separated oil recovery pipeline and an oil and refrigerant separator; an inlet end of the oil and refrigerant mixed liquid recovery pipeline communicates with an oil return port of a flooded evaporator, an outlet end of the oil and refrigerant mixed liquid recovery pipeline communicates with the oil and refrigerant separator, and oil and refrigerant mixed liquid in the flooded evaporator is drained to the oil and refrigerant separator; the oil and refrigerant separator is arranged in the flooded evaporator and carries out separation of oil and a refrigerant by employing heat of chilled water; and the separated oil recovery pipeline communicates with the bottom of the oil and refrigerant separator, and drains separated oil to an oil tank or an air inlet of a compressor. With the adoption of the oil return mode, the oil return efficiency of the flooded evaporator is improved, a utilization ratio of the liquid-state refrigerant of the flooded evaporator is increased, and long-time oil return can be realized due to the fact that the oil and refrigerant mixed liquid dose not enter the compressor or the oil tank.

The invention discloses an oil return device and an air-conditioning unit which belongs to the technical field of air conditioning and is designed to solve the problem of low oil return efficiency of the existing device. The invention relates to an oil return device, comprising an oil return assembly provided with a return port, a float, a heavy hammer and a return pipe, among which the oil return assembly is connected with the float, the upper end of the heavy hammer is connected with the float or the oil return assembly, the lower end is connected to the upper end of the oil return pipe, the oil return port communicates with the oil return pipe, and the oil return pipe can adjust its length in the vertical direction at least according to its force in the vertical direction. In that oil return device and the air-condition unit of the invention, the buoyancy and gravity balance principle are used, such that the oil return port can be accurately position in the vertical direction of the liquid surface of the oil-rich layer with the lowest height, so that the oil return is reliable, the oil return efficiency is improve, and the oil-free operation of the compressor is prevented.

The invention provides a compressor and an air conditioner. The compressor comprises a static static scroll plate, a movable scroll plate and an oil return structure; the oil return structure can collect lubricating oil in exhausted gas; a static scroll plate cover board covers the side, back on to the movable scroll plate, of the static scroll plate; a first lubricating oil chamber is arranged onthe side, facing the static scroll plate cover board, of the static scroll plate, the oil return structure can guide collected lubricating oil into the first lubricating oil chamber, and a compression cavity can communicate with the first lubricating oil chamber; and/or a second lubricating oil chamber is arranged on the side, facing the static scroll plate, of the static scroll plate cover board, the oil return structure can guide collected lubricating oil into the second lubricating oil chamber, and the compression cavity can communicate with the second lubricating oil chamber. According tothe compressor and the air conditioner, oil obtained after oil and gas in the exhausted gas are separated can be effectively supplied to a pump body structure of the compressor, the oil return amountand the oil return efficiency are improved, the oil return effect is improved, the oil supply efficiency is high, the reliability is high, abnormal abrasion of a scroll plate of a scroll compressor is reduced, and noise is lowered.

The invention discloses an anti-vibration type air cooled heat pump flooded water chilling unit and a control method thereof. The anti-vibration type air cooled heat pump flooded water chilling unit comprises an electric case, a condenser, a compressor, a secondary oil separator, a four-way reversing valve, a finned heat exchanger, a liquid separator, expending valves, a one-way valve, a liquid reservoir, a drying and filtering device, electromagnetic valves, a flooded evaporator, a gas-liquid separator and a jet pump. According to the anti-vibration type air cooled heat pump flooded water chilling unit, return oil of one way of the secondary oil separator and return oil of the flooded evaporator are subjected to intelligent control, and meanwhile unit axial flow fans are subjected to hierarchical control, so that the problems that oil throwing occurs in the process of starting the compressor, the return oil is not stable in the operational process and a low-temperature refrigeration operational system is not stable are avoided. Thus the unit can continuously run under the whole year environment, provide sufficient circulating cooling water for a device and ensure that the device can run normally and safely.

The invention discloses a double-pump oil supply fast-control system. The double-pump oil supply fast-control system comprises a hydraulic cylinder and is characterized by also comprising a low-pressure large-flow pump, a high-pressure small-flow pump, a reversing valve and a throttling valve, wherein the high-pressure small-flow pump is connected with the hydraulic cylinder by a pipeline on which the throttling valve is arranged; the pipelines on two sides of the throttling valve are connected with the reversing valve; the low-pressure large-flow pump is connected with a pipeline for connecting the high-pressure small-flow pump and the hydraulic cylinder by a branch pipeline on which a one-way valve is arranged. The double-pump oil supply fast-control system disclosed by the invention has the advantages that the problems that the hydraulic cylinder adopts a single pump for supplying oil generally, the application range is smaller, the use effect is poorer, the oil returning efficiency is poorer, the power consumption is higher, and the use need cannot be met in the prior art are solved; the structure is simple, the use is convenient, a duplex pump can be provided as a power source, the power consumption is less, the oil returning efficiency is higher, and the use is safer and more reliable.

The invention discloses a thin oil returning structure of conical heads of an uncoiling machine and a coiling machine. The thin oil returning structure comprises a conical head base and a slide sleeve, wherein a rotary shaft is arranged in the slide sleeve; a bearing arranged between the rotary shaft and the slide sleeve is respectively arranged at each of the front and rear ends of each of the rotary shaft and the slide sleeve; a sealed lubricating cavity and an air hole are formed between the rotary shaft and the slide sleeve; a front end cover and a rear end cover are respectively arranged at the front and the rear ends of the slide sleeve; the left and right ends of the lubricating cavity are sealed and capped by virtue of the front end cover and the rear end cover; a first oil inlet is formed in the front end cover, and a second oil inlet is formed in the rear end cover; a first oil collecting plate is connected to the front end cover; an oil returning opening of the first oil collecting plate is connected to a thin oil station; a second oil collecting plate is connected to the rear end cover; an oil returning opening of the second oil collecting plate is also connected to the thin oil station. Through the adoption of the thin oil returning structure disclosed by the invention, the lubricating oil is intensively collected in the oil collecting plate while leaking from the sealing ring; the lubricating oil is collected to avoid polluting the spot environment, the oil returning amount is greased, and the oil returning efficiency is greatly improved.

The invention relates to an oil separator, an oil return system and a refrigerating system. The oil separator comprises a cylinder, a basic oil return opening formed in the lower part of the cylinder, at least one enhanced oil return opening, and at least one oil level switch; each enhanced oil return opening and the basic oil return opening are spaced from each other on the cylinder; and each oil level switch is arranged on the side wall of the cylinder, each oil level switch corresponds to one enhanced oil return opening, and the corresponding oil level height in the cylinder is monitored, and each enhanced oil return opening is lower than any one of the at least one oil level switch in the height direction of the cylinder. According to the oil separator, oil can be returned in time, and the oil return efficiency is remarkably improved. The invention further discloses the oil return system and the refrigerating system comprising the oil separator.

The invention belongs to the technical field of machinery, and particularly relates to a lubricating grease coating device for electromechanical equipment installation. Aiming at the problems that a lubricating grease coating device in the prior art is difficult to clean the gaps between the tooth blocks of the gear in a machine, and the tooth-block gaps of the gear is inconvenient to be uniformlyoiled in the later period, the following scheme is provided that the device comprises an oil return box rotationally connected to the upper end of a supporting turntable, an oil storage pipe is fixedly connected to the center of the upper end of the oil return box, a plurality of lubricating oil coating assemblies meshed with a gear are fixedly connected to the upper end of the oil return box, amud pump is connected to the inner side of the oil return box, a coarse slag filter screen is arranged on the inner side of the oil return box, the inner side of the oil storage pipe is connected withan oil pump, the input end of the oil pump is connected with an oil return pipe, and the lower end of the oil return pipe is connected with oil return nozzles. According to the lubricating grease coating device, stable cleaning of oil stains at the tooth-block gaps of the gear and stable oiling after cleaning can be achieved, the oiling difficulty coefficient of the gear surface is greatly reduced, and meanwhile, the coating quality of a lubricating oil is improved.

The invention relates to an oil return circuit for an oil cylinder, in particular to an oil quick-returning-discharging circuit for an oil cylinder of a hydraulic machine. The oil quick-returning-discharging circuit comprises the oil cylinder and a main reversing valve, wherein the oil cylinder is vertically arranged; the main reversing valve is provided with a first oil outlet, a second oil outlet, an oil inlet and an oil return opening; the first oil outlet of the main reversing valve is connected with the lower cavity of the oil cylinder through an oil pipe; the oil return opening of the main reversing valve is connected with an oil tank through an oil pipe. The oil quick-returning-discharging circuit is characterized in that the lower cavity of the oil cylinder is connected with the oil inlet of the main reversing valve through an oil pipe; the second oil outlet of the main reversing valve is connected with the oil tank through an oil pipe. The oil quick-returning-discharging circuit can achieve the oil quick-returning effect of the oil cylinder of the hydraulic machine under the condition that the diameters of the first oil outlet and the oil return opening of the main reversing valve are not enlarged and no special oil return electromagnetic valve is additionally arranged, so that the manufacturing cost is lowered.

The invention relates to a floating oil recovery device. The floating oil recovery device comprises an oil suction unit, a pump and an oil-water separator. The oil suction unit comprises a floating oil tank, an inclined baffle, a bottom plate, an oil suction disk, an oil suction pipe and a control system. A partition plate is arranged in the floating oil tank. The top and the sides of the partition plate are all connected with the tank body of the floating oil tank, a channel opening for oil to enter is arranged between the bottom end of the partition plate and the bottom of the tank body of the floating oil tank, the channel opening is lower than the top end of the inclined baffle, and the top end of the inclined baffle is lower than a suction opening of the oil suction disk. A vacuum chamber and a vacuum pump are arranged on the upper portion of the floating oil tank, and the vacuum chamber and the inclined baffle are arranged on the two sides of the partition plate respectively, and communicated with the floating tank. Due to the structure, under the vacuum action, the return oil liquid level in a cavity where the oil suction disk is located is higher than the liquid level on one side of the inclined baffle, the height difference between the return oil liquid level and the suction opening of the oil suction disk can be controlled through the vacuum degree so as to be kept within a certain range, and thus the suction opening of the oil suction disk is kept immersed below the return oil liquid level, air is effectively prevented from being sucked in, and the oil return efficiency is prevented from being reduced.

The invention relates to an evaporator, an injection return flow system thereof and an air conditioning unit. A high liquid taking port and a low liquid taking port are arranged on the side wall of the evaporator, an opening-closing component for opening and closing the high liquid taking port and the low liquid taking port is arranged in the evaporator, and a control component for controlling opening-closing state of the opening-closing component to the high liquid taking port and the low liquid taking port is arranged in the evaporator. The opening-closing component is arranged to open and close the high liquid taking port and the low liquid taking port, and only one of the high liquid taking port and the low liquid taking port is controlled to be communicated with the outside constantlythrough the control component, so that one liquid taking port can be controlled and selected to be communicated with the outside through the control component; the evaporator can be ensured to have high oil return efficiency at different liquid levels.