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公开(公告)号：US12097451B2
公开(公告)日：2024-09-24
申请号：US16461938
申请日：2017-11-15
申请人： Danfoss A/S
IPC分类号： B01D35/147 , F25B1/10 , F25B49/02 , F25B41/00 , F25B41/39
CPC分类号： B01D35/1475 , F25B1/10 , F25B49/02 , F25B49/022 , F25B41/00 , F25B41/39 , F25B2309/14 , F25B2341/0012 , F25B2400/075 , F25B2400/23 , F25B2500/19 , F25B2600/0253 , F25B2600/111 , F25B2600/2509 , F25B2600/2513 , F25B2700/193 , F25B2700/1931 , F25B2700/195 , F25B2700/21152 , F25B2700/21163 , Y02B30/70
摘要： A method for controlling a vapour compression system (1) is disclosed. Malfunctioning of a gas bypass valve (8) is registered. An actual opening degree of the gas bypass valve (8) is derived, and a target opening degree of the gas bypass valve (8) is derived, based on one or more control parameters of the vapour compression system (1). The actual opening degree is compared to the target opening degree, and the vapour compression system (1) is controlled based on the comparison, and in order to match a mass flow of gaseous refrigerant through the gas bypass valve (8) to the actual opening degree of the gas bypass valve (8).
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公开(公告)号：US20240210085A1
公开(公告)日：2024-06-27
申请号：US18599992
申请日：2024-03-08
CPC分类号： F25B49/02 , F25B13/00 , F25B41/34 , F25B2313/003 , F25B2313/004 , F25B2313/0292 , F25B2313/0311 , F25B2600/0253 , F25B2600/2509 , F25B2600/2513 , Y02B30/70
摘要： An air conditioning system can be toggled between a heating mode, in which heat is withdrawn from a source (e.g., a geothermal source) and deposited into a conditioned space (e.g., a building), and a cooling mode, in which heat is withdrawn from the conditioned space and deposited into the source. The air conditioning system uses a combination of efficiency-enhancing technologies, including injection of superheated vapor into the system's compressor from an economizer circuit, adjustable compressor speed, the use of one or coaxial heat exchangers and the use of electronic expansion valves that are continuously adjustable from a fully closed to various open positions. A controller may be used to control the system for optimal performance in both the heating and cooling modes, such as by disabling the economizer circuit and vapor injection when the system is in the cooling mode.
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公开(公告)号：US11927377B2
公开(公告)日：2024-03-12
申请号：US18045774
申请日：2022-10-11
CPC分类号： F25B49/02 , F25B13/00 , F25B41/34 , F25B2313/003 , F25B2313/004 , F25B2313/0292 , F25B2313/0311 , F25B2600/0253 , F25B2600/2509 , F25B2600/2513 , Y02B30/70
摘要： An air conditioning system can be toggled between a heating mode, in which heat is withdrawn from a source (e.g., a geothermal source) and deposited into a conditioned space (e.g., a building), and a cooling mode, in which heat is withdrawn from the conditioned space and deposited into the source. The air conditioning system uses a combination of efficiency-enhancing technologies, including injection of superheated vapor into the system's compressor from an economizer circuit, adjustable compressor speed, the use of one or coaxial heat exchangers and the use of electronic expansion valves that are continuously adjustable from a fully closed to various open positions. A controller may be used to control the system for optimal performance in both the heating and cooling modes, such as by disabling the economizer circuit and vapor injection when the system is in the cooling mode.
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公开(公告)号：US11920842B2
公开(公告)日：2024-03-05
申请号：US17278723
申请日：2019-09-13
申请人： Danfoss A/S
发明人： Jan Prins , Lars Finn Sloth Larsen
IPC分类号： F25B49/02
CPC分类号： F25B49/02 , F25B2309/061 , F25B2400/075 , F25B2400/13 , F25B2600/0251 , F25B2600/2509
摘要： A method for controlling a vapour compression system (1) including a compressor unit (2) including at least two compressors (3, 12), a heat rejecting heat exchanger (4), a receiver (6), an expansion device (7) and an evaporator (8) arranged in a refrigerant path is disclosed. At least one of the compressors is a main compressor (3) being fluidly connected to an outlet of the evaporator (8) and at least one of the compressors is a receiver compressor (12) being fluidly connected to a gaseous outlet (10) of the receiver (6). A flow of vapour entering the receiver (6), such as a mass flow of vapour entering the receiver (6) is estimated and compared to a first threshold value. In the case that the estimated flow is above the first threshold value, a pressure prevailing inside the receiver (6) is controlled by operating the receiver compressor (12).
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公开(公告)号：US20180156513A1
公开(公告)日：2018-06-07
申请号：US15878882
申请日：2018-01-24
发明人： Oliver Javerschek
CPC分类号： F25B49/022 , F25B1/10 , F25B5/02 , F25B9/008 , F25B25/005 , F25B39/04 , F25B41/04 , F25B43/006 , F25B49/02 , F25B2309/061 , F25B2339/044 , F25B2341/0662 , F25B2400/0401 , F25B2400/0751 , F25B2400/23 , F25B2500/19 , F25B2500/29 , F25B2600/0253 , F25B2600/2509 , F25B2600/2513 , F25B2600/2519 , F25B2700/1332 , F25B2700/1931 , F25B2700/21 , F25B2700/2106 , F25B2700/21163 , Y02B30/741
摘要： In a refrigeration system comprising a refrigerant circuit, a heat exchanger, an expansion element which, in the active state, cools the entire mass flow of the refrigerant by expansion and thereby produces a main mass flow consisting of liquid refrigerant and an auxiliary mass flow consisting of gaseous refrigerant which enter an intermediate pressure accumulator, at least one normal refrigerating stage which expands a normal refrigerating mass flow in at least one normal refrigerating expansion unit to a low pressure and thereby makes refrigerating capacity available for normal refrigerating purposes, a refrigerant compressor unit which compresses the normal refrigerating mass flow from low pressure to high pressure, and a parallel compressor which, in a parallel compression mode of operation of the refrigerant circuit, sucks in refrigerant from the intermediate pressure accumulator and compresses it to high pressure, it is proposed that, in order to increase the efficiency, the power of the parallel compressor be controlled by a control system, that the control system determine at least one reference variable representing a load state of the refrigerant circuit, that the control system determine a set intermediate pressure value on the basis of the at least one reference variable at least in a parallel compression mode of operation, and that the control system regulate the intermediate pressure in accordance with the set intermediate pressure value at least in the parallel compression mode of operation.
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公开(公告)号：US09989281B2
公开(公告)日：2018-06-05
申请号：US14247579
申请日：2014-04-08
申请人： LG ELECTRONICS INC.
发明人： Byeongsu Kim , Beomchan Kim , Younghwan Ko , Byoungjin Ryu
CPC分类号： F25B13/00 , F25B30/02 , F25B41/04 , F25B2313/005 , F25B2313/02741 , F25B2313/0314 , F25B2313/0315 , F25B2400/13 , F25B2600/2509 , F25B2700/21151 , F25B2700/21152
摘要： An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a converting unit, a first injection module, and a second injection module. The first injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in a heating operation and supercools refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger in a cooling operation. The second injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in the heating operation and injects refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger to the compressor in the cooling operation.
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公开(公告)号：US09982919B2
公开(公告)日：2018-05-29
申请号：US15000350
申请日：2016-01-19
CPC分类号： F25B1/10 , F25B5/02 , F25B9/008 , F25B31/008 , F25B2309/061 , F25B2341/0662 , F25B2400/23 , F25B2600/2509 , F25B2600/2515 , F25B2600/2521
摘要： A system includes a flash tank, a load, a first compressor, a second compressor, and a liquid injection line. The flash tank stores a refrigerant. The load uses the refrigerant from the flash tank to remove heat from a space proximate the load. The first compressor compresses the refrigerant from the load. The second compressor compresses the refrigerant from the first compressor. The liquid injection line is coupled to the flash tank and to the second compressor and sends a liquid refrigerant from the flash tank to mix with the refrigerant from the first compressor before the refrigerant from the first compressor is received by the second compressor.
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公开(公告)号：US09964348B2
公开(公告)日：2018-05-08
申请号：US15000477
申请日：2016-01-19
CPC分类号： F25B49/02 , F25B1/10 , F25B5/02 , F25B9/008 , F25B31/008 , F25B2309/061 , F25B2341/0662 , F25B2400/0409 , F25B2400/0411 , F25B2400/23 , F25B2600/2509 , F25B2600/2515 , F25B2600/2521
摘要： A system includes a temperature sensor, a pressure sensor, and a controller. The temperature sensor measures a temperature of a refrigerant at a compressor. The compressor receives the refrigerant from a second compressor. The pressure sensor measures a pressure of the refrigerant at the compressor. The controller receives one or more of the measured temperature and the measured pressure and determines that one or more of the measured temperature and the measured pressure exceed a threshold. In response to that determination, the controller actuates a pulse valve coupled to a liquid injection line. The pulse valve controls the flow of a liquid refrigerant from a flash tank through the liquid injection line to mix with the refrigerant at the compressor.
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公开(公告)号：US20180120003A1
公开(公告)日：2018-05-03
申请号：US15795459
申请日：2017-10-27
CPC分类号： F25B40/02 , F25B7/00 , F25B15/00 , F25B21/02 , F25B27/02 , F25B40/00 , F25B41/04 , F25B49/02 , F25B2400/01 , F25B2400/0409 , F25B2400/0411 , F25B2400/054 , F25B2400/12 , F25B2400/13 , F25B2600/0261 , F25B2600/2501 , F25B2600/2509 , F25B2600/2515 , F25B2700/195 , G01N17/002
摘要： A test chamber for conditioning air has a temperature-insulated test space sealable against an environment for receiving test materials and a temperature control device for controlling the temperature of the test space, a temperature ranging from −20° C. to +180° C. in temperature being able to be realized within the test space by means of the temperature control device, said temperature control device comprising a cooling device having a cooling cycle having a refrigerant, a heat transmitter, a compressor, a condenser and an expanding element, the cooling cycle comprising an internal heat transmitter, the internal heat transmitter being connected to a high-pressure side of the cooling cycle upstream of the expanding element and downstream of the condenser in a flow direction, said refrigerant being able to cooled by means of the internal heat transmitter which is coupled to an adjustable supplementary refrigeration of the cooling device.
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公开(公告)号：US20180017059A1
公开(公告)日：2018-01-18
申请号：US15648565
申请日：2017-07-13
发明人： Jay H. JOHNSON
CPC分类号： F04C28/12 , F04C18/0207 , F04C18/107 , F04C18/16 , F04C29/12 , F04C2240/30 , F04C2270/215 , F25B1/00 , F25B1/047 , F25B31/006 , F25B40/02 , F25B49/02 , F25B49/022 , F25B2400/13 , F25B2600/2507 , F25B2600/2509
摘要： A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, and a compressor outlet. The compressor further includes a compression chamber defined between the bore and the rotor, wherein a volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. The compressor includes an economizer. The economizer is fluidically connected to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.
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