公开(公告)号：WO2023011901A1

公开(公告)日：2023-02-09

申请号：PCT/EP2022/070037

申请日：2022-07-18

Applicant: DANFOSS A/S

Inventor： FRANCK, Martin Lynder ,  PETEJAN, Igor

IPC: F16H25/20

Abstract: The present invention relates to an actuator (5) comprising a driving device (15) adapted to move a spindle (20) in first and second rotational directions (200), where the spindle (20) is connected to a nut (25) such that when the spindle (20) rotates the nut (25) is translocated in a third or fourth translational direction (210), where the movement of the nut (25) acts on a deformable part (30), such that the translocation of the nut (25) is reflected in a deformation of the deformable part (30). The deformable part (30) is deformed into a hollow (35) formed between the driving device (15) and the deformable part (30), and the spindle (20) reaches through the deformable part (30) and the hollow (35).

公开(公告)号：WO2023275398A1

公开(公告)日：2023-01-05

申请号：PCT/EP2022/068351

申请日：2022-07-01

Applicant: DANFOSS A/S

Inventor： VAN BEEK, Johan ,  BIRKELUND, Michael ,  MAYWALD, Uwe

IPC: F25B41/26

Abstract: The present invention pertains to a four-way reversing valve for a high capacity reversible heat pump compressor. The valve comprises a housing with four ports, namely a discharge port, a suction port, an evaporator port and a condenser port. It further comprises a conically shaped rotor provided rotatably inside the housing for varying flow paths between the four ports, wherein a large diameter face of the rotor comprises two separated openings, wherein a first opening fluidly connects the large diameter face to a small diameter face of the rotor via a first fluid conduit and a second opening fluidly connects the large diameter face to a radially outer portion of the rotor via a second fluid conduit. The invention also pertains to a set comprising two or more four-way reversing valves.

公开(公告)号：WO2022194489A1

公开(公告)日：2022-09-22

申请号：PCT/EP2022/054095

申请日：2022-02-18

Applicant: DANFOSS A/S

Inventor： REICHWALD, Peter ,  PRINS, Jan ,  PISCOPIELLO, Salvatore

IPC: F25B41/39

Abstract: A method for controlling a vapour compression system (1) is disclosed. The vapour compression system (1) comprises a compressor unit (2) comprising at least one main compressor (3) and at least one receiver compressor (4), a heat rejecting heat exchanger (5), a receiver (7), an expansion device (8) and an evaporator (9) being arranged in a refrigerant path. The vapour compression system (1) further comprises a bypass valve (12) fluidly interconnecting the gaseous outlet (10) of the receiver (7) and the main compressor(s) (3). A pressure difference across the bypass valve (12) is measured or derived, and a mass flow rate of refrigerant through the bypass valve (12) is derived, based at least on the pressure difference across the bypass valve (12), and using a fluid model. A minimum mass flow rate of refrigerant required to operate the receiver compressor (4) is derived, based on a minimum displacement volume of the receiver compressor (4) and using a fluid model taking prevailing operating conditions into account. In the case that the derived mass flow rate of refrigerant through the bypass valve (12) exceeds the derived minimum mass flow rate of refrigerant required to operate the receiver compressor (4), the receiver compressor (4) is started and the bypass valve (12) is closed.

公开(公告)号：WO2022187038A1

公开(公告)日：2022-09-09

申请号：PCT/US2022/017412

申请日：2022-02-23

Applicant: DANFOSS A/S

Inventor： LI, Tianlei ,  SUN, Lin Xiang

IPC: B23P15/00 ,  B23P15/04 ,  F01D5/04 ,  F04D29/22 ,  F04D29/26 ,  F04D29/32

Abstract: In some aspects, the techniques described herein relate to a method of manufacturing a shrouded impeller, including: arranging a shell relative to an impeller, wherein the impeller includes a plurality of blades, wherein the shell includes a plurality of slots, and wherein the arranging step includes aligning each of the slots with a tip of a respective one of the blades of the impeller; applying brazing paste to each of the tips by using the slots to direct the brazing paste to the tips; arranging a shroud relative to the impeller; and joining the impeller and shroud using a brazing technique.

公开(公告)号：WO2022136379A1

公开(公告)日：2022-06-30

申请号：PCT/EP2021/087004

申请日：2021-12-21

Applicant: DANFOSS A/S

Inventor： THALER, Tilen

IPC: G05D16/10

Abstract: A multi-way valve (1) with a first valve housing (6) defining a first hollow (60) and including a first valve (5), a first fluid connection (10), a second fluid connection (11) and a third fluid connection (12), and where, - a first fluid passage is formed between the first fluid connection (10) and the third fluid connection (12), which passage can be closed by a valve body (15, 16), and - where a second fluid passage is formed between the second fluid connection (11) and the third fluid connection (12), which passage can be closed by a valve body (15, 16), and - an actuating element (30) that is moveable such that when the actuating element (30) is moved from the central position into the first direction, the valve body (15, 16) is moved by in closing direction relative to the first valve seat (25) and when the actuating element (30) is moved into the opposite second direction the valve body (15, 16) is moved in closing direction relative to the second valve sat (26), where the first valve (1) connected to a pressure regulating valve (300) such that the first fluid passage from respectively the first fluid connection (10) to the third fluid connection (12) passes a pressure regulator valve opening defined by a pressure regulator valve seat (340) and pressure regulator valve element (350).

公开(公告)号：WO2021230909A1

公开(公告)日：2021-11-18

申请号：PCT/US2020/063994

申请日：2020-12-09

Applicant: DANFOSS A/S

Inventor： DOBRICA, Mihai B. ,  LI, Tianlei

IPC: F16J15/44 ,  F16J15/34

Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, a floating ring seal having a nose configured to contact a housing. Further, a low friction coating including carbon nanotubes (CNTs) is applied to one or both of the nose and the housing. In another aspect of this disclosure, the floating ring seal has first and second noses configured to contact the housing, and the first nose is radially spaced-apart from the second nose.

公开(公告)号：WO2021037970A1

公开(公告)日：2021-03-04

申请号：PCT/EP2020/073956

申请日：2020-08-27

Applicant: DANFOSS A/S

Inventor： VAN BEEK, Johan ,  BUSBY, Bruce ,  BIRKELUND, Michael

IPC: F25B13/00 ,  F25B43/00 ,  F25B43/02

Abstract: A common unit (10) for a refrigerant gas handling system (1) is described, the common unit (10) comprising an accumulator (4), a check valve (11), and a reversing valve (3). The check valve (11) and the reversing valve (3) are arranged together in a first area and the accumulator (4) is arranged in a second area. Such a system should achieve a good efficiency and a high reliability. To this end, the reversing valve (3) is connected to an actuator, wherein the actuator is arranged in the second area as well.

公开(公告)号：WO2021032810A1

公开(公告)日：2021-02-25

申请号：PCT/EP2020/073269

申请日：2020-08-19

Applicant: DANFOSS A/S

Inventor： LUND, Thomas

IPC: F25B43/00

Abstract: A refrigerant system (1) is described comprising a refrigerant circuit having a first heat exchanger (2), a compressor (3), a second heat exchanger (4) and a gas/fluid separator (5) comprising an inlet (12) connected to a refrigerant outlet of the first heat exchanger and an outlet (13) connected to the compressor (3). It should be possible to remove liquid from a refrigerant flow even with a limited size of the separator. To this end, the separator (5) comprises at least two flow paths arranged in parallel between the inlet (12) and the outlet (13) of the separator (5).

公开(公告)号：WO2020177975A1

公开(公告)日：2020-09-10

申请号：PCT/EP2020/053078

申请日：2020-02-07

Applicant: DANFOSS A/S

Inventor： STEFFENSEN, Martin Munkebo ,  NIELSEN, Nicolai Birkemose

IPC: H04W52/02

Abstract: The invention relates to a battery powered device for communicating with an access point device (34) of a communication network (36), the device (10) comprising: a communication unit (12) for communicating with the access point device (34); a processing unit (14) for controlling the communication unit (12); wherein the communication unit (12) comprises an active mode and a low power mode; wherein the communication unit (12) is further configured to provide a lost registration signal (46) indicating that the communication unit (12) is not registered at the access point device (34); wherein the processing unit (14) is configured to receive the lost registration signal (46); wherein, upon reception of the lost registration signal (46), the processing unit (14) is further configured to provide a release signal (48) to the communication unit (12), wherein the release signal (48) forces the communication unit (12) to stop communication or to detach from the access point device (34); wherein, upon reception of the lost registration signal (46), the processing unit (14) is further configured to provide a low power mode signal (50), wherein the low power signal transfers the communication unit (12) into the low power mode, wherein the processing unit (14) is further configured to provide an attach signal to the communication unit (12) after a predefined waiting period (54), wherein the attach signal transfers the communication unit (12) to the active mode and which orders the communication unit (12) to get a registration or to establish a connection to the access point device (34). The access point device (34) will therefore grant the communication unit (12) a higher priority for establishing a connection than if the communication unit (12) was not registered or detached for just a short period. Thus, after the waiting period the communication unit (12) will likely require a smaller number of connection attempts than without the waiting period. Since each connection attempt consumes a certain amount of battery power, the communication unit (12) will consume less battery power than without the waiting period. Over the lifetime of the device (10), this will significantly increase the lifetime of the battery and the device (10).

公开(公告)号：WO2020169220A1

公开(公告)日：2020-08-27

申请号：PCT/EP2019/079824

申请日：2019-10-31

Applicant: DANFOSS A/S

Inventor： AHMED, Shaheer ,  VESTERGAARD, Niels P

IPC: F16K15/02 ,  F16K15/06 ,  F16K17/04 ,  F25D21/00

Abstract: A defrost check valve (2) is described comprising an inlet (3), an outlet (4), a valve seat element (5) forming a valve seat (6) and surrounding a channel (11) connected to the inlet (3), a valve element (7) moveable in a moving direction (16), and a closing spring (8) acting on the valve element (7) in a direction towards the valve seat element (5), wherein the valve element (7) comprises a first pressure area (12) which in a closed condition of the valve is limited by the valve seat (6). Such a defrost check valve (2) should have a higher differential pressure for opening and it must open for almost full flow at a slightly higher pressure difference. To this end a pressure chamber (15) is formed between the valve element (7) and the valve seat element (5) outside the first pressure area (12) and the valve element comprises a second pressure area (20) in the pressure chamber.