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公开(公告)号：EP3660419A1
公开(公告)日：2020-06-03
申请号：EP18209030.8
申请日：2018-11-29
Applicant: Danfoss A/S
Inventor： VESTERGAARD, Niels P. , VAN BEEK, Johan
Abstract: The invention relates to a cooling system and operating method therefor with a direct expansion cooling circuit for an ammonia refrigerant. A compressor 12 is provided to compress ammonia vapor 11. A condenser is provided to condense the ammonia vapor to obtain liquid ammonia 20. An evaporator 32 is provided to evaporate the liquid ammonia. A superheat vapor quality sensor 40 is arranged at a conduit 34 between at least a portion of the evaporator 32 and the compressor 12. The superheat vapor quality sensor 40 comprises a heating element 48 and a temperature sensing element 52. The superheat vapor quality sensor 40 is disposed to deliver a sensor signal S indicative of a superheat vapor quality X of refrigerant flowing through the conduit 34 from an output of the temperature sensing element 52.
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公开(公告)号：EP3660418A1
公开(公告)日：2020-06-03
申请号：EP18209032.4
申请日：2018-11-29
Applicant: Danfoss A/S
Inventor： VESTERGAARD, Niels P. , VAN BEEK, Johan
IPC: F25B41/06
Abstract: The invention relates to a sensor arrangement for providing a sensor signal S indicative of a vapor quality X of a medium flowing within a conduit 38a. A sensor comprising a heating element and a temperature sensing element is arranged in thermal contact with a wall of the conduit 34. Processing means are disposed to deliver a sensor signal S based on an output of the temperature sensing element 52.
The invention further relates to a cooling system 10 including at least one evaporator 32 for evaporating an ammonia refrigerant, at least one compressor 12 arranged to compress the evaporated refrigerant, and at least one condenser 18 for condensing the compressed refrigerant, and at least one evaporator pump 30 for pumping the condensed refrigerant to the evaporator 32. A sensor arrangement 50 is arranged at a conduit 34 conducting the refrigerant from at least a portion of the evaporator 32.-
公开(公告)号：EP3499101A1
公开(公告)日：2019-06-19
申请号：EP17206735.7
申请日：2017-12-12
Applicant: Danfoss A/S
Inventor： VAN BEEK, Johan , PETERSEN, Hans Kurt , JENSEN, Leo Finn , BIRKELUND, Michael
Abstract: A valve arrangement (1) for an operation mode selector is described, the valve arrangement (1) comprising at least two valve modules (2), each of the valve modules (2) comprising a first mode selector valve (9) connecting a discharge conduit (7) and an evaporator conduit (19) and a second mode selector valve (10) connecting a suction conduit (8) and the evaporator conduit (19), the first mode selector valve (9) and a second mode selector valve (10) being connected by a housing section (3), and the valve modules (2) being arranged side by side in a direction parallel to the discharge conduit (7) and/or the suction conduit (8).
Such a valve arrangement should be made compact.
To this end the evaporator conduit (19) extends from the housing section (3) in an area which is limited by a first plane through the discharge conduit (7) and a second plane (35) through the suction conduit (8) and parallel to the first plane.-
公开(公告)号：EP3156746A1
公开(公告)日：2017-04-19
申请号：EP15189681.8
申请日：2015-10-14
Applicant: Danfoss A/S
Inventor： VAN BEEK, Johan , URIBE, Sergio
IPC: F25B41/06
CPC classification number: F25B41/062 , F25B2341/0651 , Y02B30/72
Abstract: An expansion valve (2) for a vapour compression system (1) and a vapour compression system (1) are disclosed. The expansion valve (1) comprises a valve element (9), a valve seat (13) as well as a biasing member (12). The valve element (9) and the valve seat (13) are arranged in a first fluid passage (6) of the expansion valve (2). The expansion valve (2) further comprises a shape memory alloy actuator (17) that exerts a force on the valve element towards an open valve position when the shape memory alloy actuator is heated by an electric current. The object of the invention is to provide an expansion valve for a vapour compression system of the above type that maybe controlled externally but is also self-regulating. To this end the shape memory alloy actuator (17) is arranged in a second fluid passage (7) of the expansion valve (2), wherein the shape memory alloy actuator (17) is arranged to be in thermal contact with the fluid in the second fluid passage (7), such that the shape memory alloy actuator also actuates the valve element (9) towards a closed valve position when the shape memory actuator (17) is cooled by the fluid in the second fluid passage (7).
Abstract translation: 公开了一种用于蒸气压缩系统（1）和蒸汽压缩系统（1）的膨胀阀（2）。 膨胀阀（1）包括阀元件（9），阀座（13）以及偏压元件（12）。 阀元件（9）和阀座（13）布置在膨胀阀（2）的第一流体通道（6）中。 膨胀阀（2）还包括形状记忆合金致动器（17），当形状记忆合金致动器被电流加热时，该形状记忆合金致动器（17）在阀元件上朝向打开的阀位置施加力。 本发明的目的是提供一种用于上述类型的蒸汽压缩系统的膨胀阀，其可以从外部控制，但也是自调节的。 为此，形状记忆合金致动器（17）布置在膨胀阀（2）的第二流体通道（7）中，其中形状记忆合金致动器（17）布置成与 第二流体通道（7），使得当形状记忆致动器（17）被第二流体通道（7）中的流体冷却时，形状记忆合金致动器还致动阀元件（9）朝向关闭的阀位置。
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