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公开(公告)号：EP3628940A1
公开(公告)日：2020-04-01
申请号：EP18196410.7
申请日：2018-09-25
Applicant: Danfoss A/S
Inventor： PRINS, Jan , LARSEN, Lars Finn Sloth
Abstract: A method for controlling a vapour compression system (1) comprising a compressor unit (2) comprising 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：EP3601907A1
公开(公告)日：2020-02-05
申请号：EP18715561.9
申请日：2018-03-23
Applicant: Danfoss A/S
Inventor： PRINS, Jan , MADSEN, Kenneth Bank , LARSEN, Lars Finn Sloth
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公开(公告)号：EP3589900A1
公开(公告)日：2020-01-08
申请号：EP17818145.9
申请日：2017-12-20
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , PRINS, Jan , MADSEN, Kenneth Bank
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公开(公告)号：EP3619480A1
公开(公告)日：2020-03-11
申请号：EP18725759.7
申请日：2018-04-25
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , PRINS, Jan , GREEN, Torben
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公开(公告)号：EP1987291B1
公开(公告)日：2016-10-12
申请号：EP07702482.6
申请日：2007-02-08
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , THYBO, Honglian , THYBO,Claus
CPC classification number: F24D19/1009 , F24D3/12 , G05D23/1919
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Patent Agency Ranking
公开(公告)号：EP2504655A2
公开(公告)日：2012-10-03
申请号：EP10731708.3
申请日：2010-06-30
Applicant: Danfoss A/S
Inventor： THYBO, Claus , LARSEN, Lars Finn Sloth , MADER, Gunda
CPC classification number: F28F9/0234 , F25B40/00 , F25B2400/054 , F28F2260/02
Abstract: A heat exchanger, such as an evaporator (1) or a condenser (17), for a vapour compression system (15) and a vapour compression system (15) with such a heat exchanger are disclosed. The heat exchanger comprises at least two flow tubes arranged fluidly in parallel, an inlet manifold (3) and an outlet manifold (7). Each flow tube fluidly connects the inlet manifold (3) and the outlet manifold (7), and fluid medium is distributed among the flow tubes by the inlet manifold (3). The outlet manifold (7) is provided with a suction line heat exchanger, preferably being fluidly connected in a refrigerant path of the vapour compression system (15) between a condenser (17) and an expansion device (18), in the case that the heat exchanger is an evaporator (1). The suction line heat exchanger is arranged in the outlet manifold (7) in such a manner that direct thermal contact is provided between the refrigerant delivered from the flow tubes and the suction line heat exchanger, the refrigerant, e.g., being sprayed directly onto the suction line heat exchanger. Refrigerant leaving the evaporator (1) is heated, thereby causing evaporation of possible liquid refrigerant. Thereby liquid refrigerant can be allowed to pass through some of the evaporator tubes (2) without risking damage to the compressor (16). Utilisation of the potential refrigeration capacity of the evaporator (1) is improved. Arranging the suction line heat exchanger in the outlet manifold (7) provides a compact design and eliminates the requirement for additional components.
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公开(公告)号：EP3839378A1
公开(公告)日：2021-06-23
申请号：EP19218941.3
申请日：2019-12-20
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , FUNDER-KRISTENSEN, Torben
Abstract: A method for controlling a vapour compression system (1) comprising two or more evaporators (5, 12), each evaporator (5, 12) being arranged in thermal contact with a refrigerated volume, and each evaporator (5, 12) receiving refrigerant via an expansion device (6, 13) is disclosed. In response to receipt of a load shedding command originating from a power grid (17), the vapour compression system (1) reduces a compressor capacity of the compressor unit. The refrigerated volumes are divided into at least two prioritized categories of refrigerated volumes, where a first category (18) includes refrigerated volumes with temperature critical storage, and a second category (19) includes refrigerated volumes with temperature non-critical storage. Refrigerant supply to the evaporator(s) (5, 12) being in thermal contact with the refrigerated volume(s) of the second category (19) is discontinued, and refrigerant supply to the evaporator(s) (5, 12) being in thermal contact with the refrigerated volume(s) of the first category (18) is continued. Thereby the vapour compression system (1) is capable of providing load shedding services for an extended period of time without compromising temperature critical storage.
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公开(公告)号：EP2203687A1
公开(公告)日：2010-07-07
申请号：EP08801367.7
申请日：2008-09-24
Applicant: Danfoss A/S
Inventor： THYBO, Honglian , THYBO, Claus , LARSEN, Lars Finn Sloth
CPC classification number: F24D19/1009 , F24D3/12 , F24D5/02 , F24F2130/00 , F24F2130/10 , Y02A30/12 , Y02B10/20 , Y02B10/70
Abstract: The invention provides a method of controlling a release of thermal energy in a building. The method comprises steps of defining a control criterion for the building, defining a set of climate variables which influence the release of thermal energy in the building, and defining for each climate variable, a climate signification index which defines the importance of that climate variable for the release of thermal energy in the building. Furthermore, the method comprises a step of receiving a set of predicted future climate variables, and subsequently a step of combining the climate signification indices and the predicted future climate variables to provide control instructions for release of an amount of thermal energy in the building to satisfy the control criterion. The invention further provides a comfort control system.
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公开(公告)号：EP4253873A1
公开(公告)日：2023-10-04
申请号：EP22164723.3
申请日：2022-03-28
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , KAPICI, Erhan , GREEN, Torben
Abstract: A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising a compressor unit (2), a heat rejecting heat exchanger (3), an expansion device (4) and an evaporator (5) arranged in a refrigerant path. A superheat value of refrigerant leaving the evaporator (5) is derived, and a quantity being representative for a variance of the derived superheat value is calculated. A reference superheat value is calculated, based on the calculated quantity and on a minimum acceptable superheat value. The expansion device (4) is operated in accordance with the calculated reference superheat value, and in order to obtain a superheat of refrigerant leaving the evaporator (5) which is equal to the reference superheat value.
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公开(公告)号：EP4227603A1
公开(公告)日：2023-08-16
申请号：EP22156342.2
申请日：2022-02-11
Applicant: Danfoss A/S
Inventor： LARSEN, Lars Finn Sloth , LUCKMANN, Ejnar , MOOS, Hans
Abstract: A method for operating a vapour compression system (1) is disclosed. A cut-in temperature, a high temperature alarm limit and a high temperature alarm delay time are set. A maximum acceptable relative decay value is derived, based on the high temperature alarm limit and the high temperature alarm delay time. The vapour compression system (1) is operated while monitoring a temperature inside a refrigerated volume and continuously deriving a weighted mean temperature prevailing inside the refrigerated volume, during a moving time window of a predefined length. In the case that the weighted mean temperature inside the refrigerated volume exceeds the cut-in temperature, a timer is started, and a delay time is derived, based on the weighted mean temperature and the maximum acceptable relative decay value. A warning is generated when the timer reaches the derived delay time.
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