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公开(公告)号：US11204187B2
公开(公告)日：2021-12-21
申请号：US16034457
申请日：2018-07-13
Applicant: Danfoss A/S
Inventor： Frank D. Ford
Abstract: A chiller system according to an exemplary aspect of the present disclosure includes a compressor section and a controller. The compressor section has a first refrigerant compressor having a first cooling capacity and a second refrigerant compressor having a second cooling capacity different from the first cooling capacity. The controller is configured to selectively operate the first and second refrigerant compressors.
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公开(公告)号：US20210190066A1
公开(公告)日：2021-06-24
申请号：US17039210
申请日：2020-09-30
Applicant: Danfoss A/S
Inventor： Stig Kildegaard Andersen , Frank Holm Iversen
IPC: F04B53/10
Abstract: A valve plate assembly (1) of a hydraulic axial piston machine is described, the valve plate assembly comprising a wear plate (2) made of a ceramic material surrounded by a compression ring (4). Such a valve plate assembly should be produced and maintained in a cost-effective manner. To this end, the wear plate (2) is connected to a support plate (3) by means of the compression ring (4).
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公开(公告)号：US11035351B2
公开(公告)日：2021-06-15
申请号：US16254955
申请日：2019-01-23
Applicant: Danfoss A/S
IPC: F04B11/00 , F04B1/20 , F04B1/2014 , F03C1/06 , F04B1/2021 , F01B3/00
Abstract: A hydraulic machine is described comprising a first part (1, 4) and a second part (7, 8), wherein the first part (1, 4) and the second part (7, 8) are movable relatively to each other in abutting relation, the first part (1, 4) comprises a pressure chamber (2) having a pressure chamber opening (6) in a contact face (5) contacting a sealing face (9) of the second part (7, 8), the second part (7, 8) comprises a low pressure area (10) connected to a low pressure opening (11) in the sealing face (9) and a high pressure area (12) connected to a high pressure opening (13) in the sealing face (9), wherein during a movement of the first part (1, 4) with respect to the second part (7, 8) in a moving direction (14) the pressure chamber opening (6) comes alternatingly in overlap with the low pressure opening (11) and the high pressure opening (13). Such a machine should be flexible in operation with low risk of damages caused by cavitation. To this end a throttling channel (15) in the second part (7, 8) connects the low pressure area (10) with an area in the sealing face (9) in moving direction in front of the low pressure opening (11).
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公开(公告)号：US10557473B2
公开(公告)日：2020-02-11
申请号：US15120699
申请日：2014-02-20
Applicant: DANFOSS A/S
Inventor： William Turner Thornton , Lin Sun
Abstract: This disclosure relates to a control system and method for the centrifugal compressor. The system, for example, includes a controller configured command an adjustment of at least one of (1) a flow regulator and (2) a speed of a shaft in order to provide safe, efficient compressor operation. Centrifugal compressors are used to circulate refrigerant in a chiller via a refrigerant loop. Centrifugal compressors operate efficiently before reaching a condition known as surge.
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Patent Agency Ranking
公开(公告)号：US10551102B2
公开(公告)日：2020-02-04
申请号：US15543268
申请日：2016-01-05
Applicant: DANFOSS A/S
Inventor： Jens Erik Rasmussen
Abstract: A bulb (5) for a thermostatic expansion valve is provided, said bulb (5) comprising a chamber (7), said chamber (7) being located within a metallic casing of said bulb and being filled with a filling adapted to influence a valve element of said thermostatic expansion valve. Service of a temperature controlled valve connected to a bulb should be facilitated. To this end said bulb (5) comprises a connection geometry (10) adapted to be connected to a capillary member (6) and said casing being provided with a closed opening zone located within said connection geometry (10), said opening zone being adapted to be opened upon mounting a counterpart (15) to said connection geometry (10).
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公开(公告)号：US10443753B2
公开(公告)日：2019-10-15
申请号：US14760852
申请日：2014-01-15
Applicant: Danfoss A/S
Inventor： Johan van Beek , Michael Birkelund
Abstract: The invention relates to an actuator for a valve in a refrigeration system. The invention also relates to a valve with such actuator, and to a refrigeration system with such valve. The actuator comprises an elongated Shape Memory Alloy (SMA) element extending along two or more string-like extensions from a distant end to a proximate end in relation to a valve element of a valve. The SMA element, when forming part of the valve, may extend from the distant end to the proximate end connected to a housing of the SMA element, however, electrically insulated from the housing. An encapsulation may provide a thermal resistance, a thermal conductor and/or an electrical resistance between the SMA element and other elements or the surroundings of the SMA element.
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公开(公告)号：US10443750B2
公开(公告)日：2019-10-15
申请号：US15743322
申请日：2016-05-26
Applicant: DANFOSS A/S
Inventor： Behzad Parastar , Detlef Matzen , Klaus Halldorsson , Simon Ahrens Lassen
Abstract: The invention relates to a pilot valve arrangement (1) comprising a pilot valve device (2) which comprises a pilot valve element (13), a pilot valve seat (14) cooperating with the pilot valve element (13) and a presetting mechanism for presetting an opening pressure of the pilot valve element (13), the pilot valve arrangement (1) further comprising a presetting mechanism actuating device (3) which comprises an actuator element (17) adapted to create an actuating force in order to actuate the presetting mechanism in the pilot valve device so as to preset the opening pressure. According to the invention, the pilot valve arrangement (1) comprises a contactless force coupling arrangement adapted to transfer the actuating force from the presetting mechanism actuating device (3) to the pilot valve device (2). An inventive pilot valve device (2) is disclosed and claimed as well. The invention allows to improve maintenance and safety concerning the devices mentioned above.
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公开(公告)号：US10436184B2
公开(公告)日：2019-10-08
申请号：US15017699
申请日：2016-02-08
Applicant: Danfoss A/S
Inventor： Sveinn Porarinsson
IPC: F04B1/20
Abstract: A hydraulic device 1 comprises a first member 2 movable relative to a second member 5. In such a device the risk of cavitation noise and cavitation damage should be minimized. To this end said first member 2 having a pressure chamber 3 opening in a face 7 of said first member 2 which face 7 is in contact with a contact face 6 of said second member 5, said second member 5 having a low pressure area 9, wherein a throttling flow path is provided in a groove 11 connecting said pressure chamber 3 and said low pressure area 9 when pressure chamber 3 is approaching said low pressure area 9, characterized in that a throttling resistance of said groove 11 increases in a direction of the flow through said groove 11.
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