公开(公告)号：US11988420B2

公开(公告)日：2024-05-21

申请号：US17574813

申请日：2022-01-13

Applicant: DANFOSS A/S

Inventor： Tianli Zhang ,  Jin Yan

IPC: F25B31/02 ,  F04D25/06 ,  H02K1/30 ,  H02K5/20 ,  H02K9/06

CPC classification number: F25B31/026 ,  F04D25/06 ,  H02K1/30 ,  H02K5/207 ,  H02K9/06

Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: an impeller; a shaft; a motor configured to rotate the impeller via the shaft, wherein the motor includes a stator and a rotor; and a housing surrounding the motor, wherein the housing includes a first inlet configured to permit fluid to enter the housing and flow along a stator cooling line and a second inlet configured to permit fluid to enter the housing and flow a rotor cooling line, and wherein the first inlet is separate from the second inlet.

公开(公告)号：US20240159468A1

公开(公告)日：2024-05-16

申请号：US18259672

申请日：2021-12-23

Applicant: Danfoss A/S

Inventor： Jing YUAN ,  Leilei WANG ,  Feng ZHANG ,  Xuemei YANG

IPC: F28D1/053 ,  F28F1/02

CPC classification number: F28D1/05366 ,  F28F1/022

Abstract: A heat exchanger including: a collecting pipe that has a collecting pipe wall; and a plurality of flat pipes. The plurality of flat pipes include two groups of first flat pipes, which are positioned on the outermost side in an axial direction of the collecting pipe, and a second flat pipe, which is positioned between the two groups of first flat pipes; and the collecting pipe includes two first parts, which correspond to the two groups of first flat pipes in the axial direction of the collecting pipe, and a second part, which is positioned between the two first parts. The tensile strength of at least one group of first flat pipes from the two groups of first flat pipes in the axial direction of the collecting pipe is greater than the tensile strength of the second flat pipe in the axial direction of the collecting pipe and/or the tensile strength of at least one first part from the two first parts of the collecting pipe in the axial direction of the collecting pipe is greater than the tensile strength of the second part of the collecting pipe in the axial direction of the collecting pipe. By means of the heat exchanger in the present invention, the bursting strength of the heat exchanger can be improved.

公开(公告)号：US11976747B2

公开(公告)日：2024-05-07

申请号：US17440301

申请日：2020-01-24

Applicant: Danfoss A/S

Inventor： Bruce Busby ,  Michael Birkelund ,  Johan Van Beek

IPC: F16K15/02 ,  F04D27/02 ,  F16K47/00 ,  F04D17/10 ,  F04D29/048 ,  F25B31/00

CPC classification number: F16K47/0111 ,  F04D27/0292 ,  F16K15/026 ,  F04D17/10 ,  F04D27/0215 ,  F04D29/048 ,  F25B31/00

Abstract: The invention relates to a compressor unit (200) for a refrigeration system using a refrigerant. The compressor (200) unit includes a centrifugal compressor (201) for compressing the refrigerant, wherein the compressor (201) has a discharge outlet (204) for discharging the compressed refrigerant, and a check valve (1; 100; 301a). An inlet (83) of the check valve (1; 100; 301a) is in fluid connection with the discharge outlet (204) of the compressor (201). In order to provide a more reliable and more quite compressor unit (200), the check valve (1; 100; 301a) is a nozzle check valve including a damping mechanism (41, 50; 50, 141), wherein a closing parameter of the check valve (1; 100; 301a) is between 50 s/m2 and 2000 s/m2, wherein the closing parameter is a closing time of the check valve (1; 100; 301a) divided by a port area of the check valve (1; 100; 301a).

公开(公告)号：US11952987B2

公开(公告)日：2024-04-09

申请号：US17038959

申请日：2020-09-30

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Sveinn Porarinsson

IPC: F04B1/124 ,  F04B1/2021

CPC classification number: F04B1/124 ,  F04B1/2021

Abstract: A hydraulic piston machine is described comprising a piston (1) having a hollow (2) secured by a wall (3) and an insert (4) arranged in the hollow. Such a machine should have a high efficiency at low costs. To this end the insert (4) comprises a section (29) which extends out of the hollow (2).

公开(公告)号：US20240102747A1

公开(公告)日：2024-03-28

申请号：US18264195

申请日：2021-12-23

Applicant: Danfoss A/S

Inventor： Jing YUAN ,  Feng ZHANG ,  Yubao LIU ,  Xuemei YANG

IPC: F28F9/02

CPC classification number: F28F9/0246 ,  F28F9/0265

Abstract: Disclosed in the present invention are a manifold assembly and a heat exchanger. The manifold assembly includes a manifold and a connecting tube assembly. The connecting tube assembly includes an adapter and a steering member. The adapter includes: a tubular part located outside the manifold; and a step part protruding inward from the inner surface of the tubular part at the end portion of the tubular part facing the manifold. The steering member includes: an end wall, a connecting wall extending from the end wall along a direction intersecting the axial direction of the manifold, and a step part protruding outward from the connecting wall at the end portion of the connecting wall away from the end wall. The steering member is inserted into a through hole of the manifold by means of an inner hole of the adapter; the side of the step part of the steering member facing the end wall abuts against the step part of the adapter; and the part of the connecting wall inserted into the manifold is provided with openings that penetrate through the connecting wall. According to the manifold assembly of the present invention, direct impact of a fluid from an inlet on a flat tube is avoided, and the manufacturing and assembly processes are simple and the costs are low.

公开(公告)号：US20240100481A1

公开(公告)日：2024-03-28

申请号：US18347685

申请日：2023-07-06

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Poul Erik Hansen ,  Georg Herborg Enevoldsen

IPC: B01D61/06 ,  B01D61/02 ,  B01D61/08 ,  B01D61/10 ,  B01D61/12 ,  C02F1/44

CPC classification number: B01D61/06 ,  B01D61/026 ,  B01D61/08 ,  B01D61/10 ,  B01D61/12 ,  C02F1/441 ,  B01D2313/243 ,  B01D2313/246 ,  B01D2313/70 ,  B01D2315/10 ,  B01D2317/022 ,  C02F2209/03 ,  C02F2301/04 ,  C02F2301/066 ,  C02F2303/10

Abstract: A system for reverse osmosis, RO, including a first RO stage (10) with a first feed inlet (11), a first brine outlet (12), and a first permeate outlet (13); a second RO stage (20) with a second feed inlet (21), a second brine outlet (22), and a second permeate outlet (23); and a pressure exchanger, PE, (40) connected between the second brine outlet (22) and the first feed inlet (11), wherein a first pressure difference Δp1 between the first brine outlet (12) and the second feed inlet (21) corresponds to a second pressure difference Δp2 between the second brine outlet (22) and the pressure exchanger (40). The invention further discloses a method for operating such a system for reverse osmosis (100).

公开(公告)号：US20230398493A1

公开(公告)日：2023-12-14

申请号：US18330401

申请日：2023-06-07

Applicant: Danfoss A/S

Inventor： Georg Herborg Enevoldsen

IPC: B01D61/58 ,  B01D61/06 ,  B01D61/00 ,  C02F1/44 ,  B01D61/08 ,  B01D61/10

CPC classification number: B01D61/58 ,  B01D61/06 ,  B01D61/0022 ,  C02F1/445 ,  C02F1/441 ,  B01D61/08 ,  B01D61/10 ,  B01D61/0023 ,  B01D61/005 ,  C02F2103/08

Abstract: A system for reverse osmosis, RO, and for pressure retarded osmosis, PRO, includes: a RO subsystem (10) with a high-pressure RO chamber (11) and a low-pressure RO chamber (12) separated by a RO membrane (13), the high-pressure RO chamber (11) having a RO feed inlet (14) and a brine outlet (15) and the low-pressure RO chamber (12) having a permeate outlet (16); a PRO subsystem (20) with a high-pressure PRO chamber (21) and a low-pressure PRO chamber (22) separated by a PRO membrane (23), the high-pressure PRO chamber (21) having a draw inlet (24) and a draw outlet (25) and the low-pressure PRO chamber (22) having PRO feed inlet (26) and a PRO feed outlet (27); an induction motor (30) having a stator and a rotor, wherein the rotor is mechanically connected to an input shaft of a hydraulic pump (31) configured for providing a feed solution to the RO feed inlet (14) and to an output shaft of a hydraulic motor (32) configured for receiving a draw solution from the draw outlet (25). The invention further discloses a method for operating such system for RO/PRO and to the use of such system.

公开(公告)号：US11841173B2

公开(公告)日：2023-12-12

申请号：US16455998

申请日：2019-06-28

Applicant: Danfoss A/S

Inventor： Tianlei Li ,  Zili Sun ,  Lin Sun

IPC: F04D27/00 ,  F25B1/053 ,  F04D29/44

CPC classification number: F25B1/053 ,  F04D27/002 ,  F04D29/441

Abstract: A centrifugal compressor includes a first stage and a second stage. At least one of the first stage and the second stage includes an impeller and a shroud spaced from the impeller and configured to guide a fluid flow through the impeller. The shroud is selectively moveable between an engaged position and a disengaged position.

公开(公告)号：US11828274B2

公开(公告)日：2023-11-28

申请号：US18173132

申请日：2023-02-23

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Tommi Kolb

IPC: F04B1/126 ,  F16L27/04 ,  F16J1/04

CPC classification number: F04B1/126 ,  F16J1/04 ,  F16L27/04

Abstract: A piston (1) having a piston shaft (2), a ball head (3) at one end of the piston shaft (2), and a slider shoe (4) mounted to the ball head (3), wherein the ball head (3) has a through channel (5), the slider shoe (4) has a sliding surface (6) and a through hole (7) in communication with an end of the through channel (5), and a plastic material (8) is arranged in a gap between the slider shoe (4) and the ball head (3) and forms an inner coating (9) of the through hole (7). The production of such a piston should be facilitated. To this end a sealing surface (14) is arranged at the end of the through channel (5) wherein the sealing surface (14) surrounds the opening of the through channel (5) into the through bore (7) and an inner diameter of the sealing surface (14) is smaller than an inner diameter of the inner coating (9) of the through bore (7).

公开(公告)号：US20230341196A1

公开(公告)日：2023-10-26

申请号：US18303027

申请日：2023-04-19

Applicant: Danfoss A/S

Inventor： Jing YUAN ,  Jing YANG ,  Yubao LIU ,  Lisha CHEN

IPC: F28F9/04 ,  F16L41/12

CPC classification number: F28F9/04 ,  F16L41/12

Abstract: A connecting pipe assembly and a heat exchanger is disclosed. The connecting pipe assembly includes: a pipe; and a first flange extending towards a radial outside from an outer peripheral surface of the pipe. The pipe includes a first insertion pipe section located on one side of the first flange in an axial direction of the pipe. Thereby the quality of the heat exchanger is improved.