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公开(公告)号：US20240310087A1
公开(公告)日：2024-09-19
申请号：US18605251
申请日：2024-03-14
申请人： Zhigang Long
发明人： Zhigang Long
CPC分类号： F25B31/004 , F25B31/026 , F25B49/022
摘要： Embodiments of the present application provide a refrigeration system, which includes a scroll compressor, a first condenser, a second condenser and a heat exchange device; wherein the scroll compressor includes a housing, and a low pressure chamber, a high pressure chamber and an oil pool that are disposed in the housing; the high pressure chamber is connected to the oil pool; the housing is provided with a gas suction port, a liquid-spraying enthalpy increasing port, a first gas exhaust port and a first oil outlet; the first gas exhaust port is configured to connect to the first condenser, to convey condensed refrigerant to the heat exchange device, one end of the gas suction port is connected to the scroll compressor, and the other end thereof is connected to the heat exchange device, to absorb the refrigerant that flows back after heat exchange by the heat exchange device; the first oil outlet is connected to an inlet of the second condenser, and an outlet of the second condenser is connected to the liquid-spraying enthalpy increasing port, oil cooled by the second condenser provides cooling for the scroll compressor.
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公开(公告)号：US12078391B2
公开(公告)日：2024-09-03
申请号：US18315748
申请日：2023-05-11
发明人： Shitong Zha , Augusto Zimmermann
CPC分类号： F25B31/004 , F25B5/02 , F25B43/006 , F25B49/02 , F25B2600/2501
摘要： A cooling system drains oil from low side heat exchangers to vessels and then uses compressed refrigerant to push the oil in the vessels back towards a compressor. Generally, the cooling system operates any number and combination of three different modes of operation: a normal mode, an oil drain mode, and an oil return mode. During the normal mode, a primary refrigerant is cycled to cool one or more secondary refrigerants. As the primary refrigerant is cycled, oil from a compressor may mix with the primary refrigerant and become stuck in a low side heat exchanger. During the oil drain mode, the oil in the low side heat exchanger is allowed to drain into a vessel. During the oil return mode, compressed refrigerant is directed to the vessel to push the oil in the vessel back towards a compressor.
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公开(公告)号：US12025356B2
公开(公告)日：2024-07-02
申请号：US17774890
申请日：2020-11-26
发明人： Kiyoshi Tanaka
CPC分类号： F25B43/02 , F04C29/025 , F25B31/004 , F25B49/02 , F25B2700/03
摘要： An oil supply system for a compressor according to an embodiment includes an oil separator connected to a discharge pipe of the compressor, an oil tank for receiving oil from an oil sump of the oil separator, an oil pipe disposed between the oil separator and the oil tank, a pressure reducing valve disposed on the oil pipe, an oil supply pipe for supplying the oil to an oil line for supplying the oil to the compressor from an oil sump of the oil tank, and an agitator disposed on the oil pipe.
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4.发明授权公开(公告)号：US12025353B2
公开(公告)日：2024-07-02
申请号：US17564360
申请日：2021-12-29
发明人： Min Zhou , Hongbin Liu
CPC分类号： F25B31/004 , F25B13/00 , F25B2313/02742 , F25B2400/23 , F25B2600/2513
摘要： An oil return control method of a multi-functional multi-split system with double four-way valves. The multi-functional multi-split system includes an outdoor unit, at least one set of hydraulic modules and at least one set of indoor modules. When the multi-split system is switched from a normal operation mode to an oil return mode, a first four-way valve and a second four-way valve are powered down, and operation modes of each set of indoor modules and each set of hydraulic modules, the on/off state of fans of an indoor heat exchanger and a hydraulic heat exchanger, opening degrees of a first electronic expansion valve of the indoor heat exchanger and a first electronic expansion valve of the hydraulic heat exchanger, and the on/off state of a first electromagnetic valve and a second electromagnetic valve are correspondingly adjusted based on the previous operation modes.
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公开(公告)号：US11965681B2
公开(公告)日：2024-04-23
申请号：US16332903
申请日：2017-08-28
申请人： Carrier Corporation
发明人： Michael A. Stark , Hsihua Li , Haitao Zhang , Biao Shu , Kai Deng , Haiping Ding
CPC分类号： F25B31/002 , F25B31/004 , F25B49/02 , F25B2339/0242 , F25B2500/16 , F25B2500/26 , F25B2600/01 , F25B2600/05 , F25B2700/04
摘要： A refrigeration system and a lubricating method thereof. The refrigeration system (100) includes: a compressor (110), a condenser (120), an evaporator (130), and a lubrication circuit (200), the lubrication circuit including a post-lubrication flow path (230,240,260) connected from the compressor into the condenser and the evaporator respectively; and a pre-lubrication flow path (210,220,250) connected from the condenser and the evaporator into the compressor respectively; wherein after flowing from the condenser via the pre-lubrication flow path to the compressor for lubrication, a part of refrigerant for lubrication can flow back to the evaporator via the post-lubrication flow path; or after flowing from the evaporator via the pre-lubrication flow path to the compressor for lubrication, the part of refrigerant for lubrication can flow back to the condenser via the post-lubrication flow path.
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公开(公告)号：US20240068718A1
公开(公告)日：2024-02-29
申请号：US18493662
申请日：2023-10-24
发明人： Shitong Zha , Augusto Zimmermann
CPC分类号： F25B31/004 , F25B5/02 , F25B43/006 , F25B49/02 , F25B43/02
摘要： A cooling system drains oil from low side heat exchangers to vessels and then uses compressed refrigerant to push the oil in the vessels back towards a compressor. Generally, the cooling system can operate in any number and combination of three different modes of operation: a normal mode, an oil drain mode, and an oil return mode. During the normal mode, a primary refrigerant is cycled to cool one or more secondary refrigerants. As the primary refrigerant is cycled, oil from a compressor may mix with the primary refrigerant and become stuck in a low side heat exchanger. During the oil drain mode, the oil in the low side heat exchanger is allowed to drain into a vessel. During the oil return mode, compressed refrigerant is directed to the vessel to push the oil in the vessel back towards a compressor.
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公开(公告)号：US20230375236A1
公开(公告)日：2023-11-23
申请号：US18027980
申请日：2020-11-04
发明人： Ryota YUASA , Hiroki ISHIYAMA
CPC分类号： F25B31/004 , F25B13/00 , F25B2400/23 , F25B2313/02741 , F25B2700/2109 , F25B2700/21152
摘要： A refrigeration cycle apparatus comprises: a compressor; a first heat exchanger; a second heat exchanger; a first decompressing apparatus; an oil separator; a first circulation pathway in which a refrigerant circulates in an order of the compressor, the first heat exchanger, the oil separator, the first decompressing apparatus, and the second heat exchanger; an oil-returned pathway connecting between the oil separator and a suction side of the compressor; a second decompressing apparatus provided in the oil-returned pathway; and a controller configured to control the first decompressing apparatus and the second decompressing apparatus. The controller is configured to set an operation mode to an oil collection mode by adjusting a degree of decompression of the first decompressing apparatus and a degree of decompression of the second decompressing apparatus when the refrigerant and a refrigerating machine oil flowing in the first circulation pathway are separated in the oil separator.
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公开(公告)号：US20230349602A1
公开(公告)日：2023-11-02
申请号：US17921160
申请日：2021-04-27
发明人： Takaya ISHIGURO
CPC分类号： F25B31/004 , F25B43/00 , F25B2500/16
摘要： A HVAC system refrigeration circuit is configured to balance the oil carryover between multiple compressors using a single refrigeration circuit. Embodiments of the HVAC system allow for the use of one or more inverter compressors and one or more fixed speed compressors. Embodiments of the HVAC system utilize capillary tubes or other flow control methods to balance the oil carryover between multiple compressors.
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公开(公告)号：US20230251004A1
公开(公告)日：2023-08-10
申请号：US18107832
申请日：2023-02-09
发明人： Toyoaki KIYA , Osamu KOSUDA , Hiroshi YATOGO
CPC分类号： F25B31/004 , F25B7/00
摘要： Provided is a refrigeration apparatus capable of appropriately supplying oil separated by oil separators to compressors according to the situation. The refrigeration apparatus includes refrigeration units each including a compressor, an oil separator, an oil return pipe, and a heat dissipation heat exchanger; a pressure reducing valve connected to the heat dissipation heat exchangers; and an oil return control mechanism controlling a return destination of the oil separated by the oil separators. The oil return control mechanism includes an oil supply pipe connecting the oil return pipes; a flow control mechanism, controlling a flowing condition of oil in the oil supply pipe, disposed in the oil supply pipe; and an ejection control mechanism, controlling an ejection condition of oil ejected from the oil separator, disposed in each oil return pipe at a position closer to the oil separator than a connection position with the oil supply pipe is.
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公开(公告)号：US20230251003A1
公开(公告)日：2023-08-10
申请号：US18107826
申请日：2023-02-09
发明人： Toyoaki KIYA , Osamu KOSUDA , Ryosuke TSUIHIJI , Ibuki SUKEGAWA
CPC分类号： F25B31/004 , F25B41/20
摘要： Provided is a refrigeration apparatus capable of appropriately supplying oil separated by oil separators to compressors according to the situation. The refrigeration apparatus includes N refrigeration units each including a compressor, an oil separator, an oil return pipe, and a heat dissipation heat exchanger; N pressure reducing valves each connected to the heat dissipation heat exchanger of a corresponding one of the N refrigeration units; and an oil return control mechanism that controls a return destination of the oil separated by the oil separators of the N refrigeration units. The oil return control mechanism includes an oil supply pipe that connects the oil return pipes of the N refrigeration units to each other, and a flow control mechanism, which controls a flowing condition of oil in the oil supply pipe, disposed in the oil supply pipe.
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