Patents by Inventor Sascha Hellmann
Sascha Hellmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11754320Abstract: Refrigeration systems are described. The systems include a compression device, a heat rejecting heat exchanger, an ejector, and first and second expansion devices with respective heat absorbing heat exchangers. The ejector is arranged to receive refrigerant fluid from the heat rejecting heat exchanger at a high pressure inlet of the ejector. Fluid pathways extend from an outlet of the ejector into a branched flow path to provide flows of refrigerant from the ejector to the first and second expansion devices. The first heat absorbing heat exchanger provides cooling at a first temperature and refrigerant fluid from the outlet of the first heat absorbing heat exchanger is directed to a low pressure inlet of the ejector. The second heat absorbing heat exchanger provides cooling at a second temperature and refrigerant fluid from the outlet of the second heat absorbing heat exchanger is directed to the inlet of the compression device.Type: GrantFiled: December 18, 2020Date of Patent: September 12, 2023Assignee: CARRIER CORPORATIONInventors: Sascha Hellmann, Nicolas Pondicq Cassou
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Patent number: 11215386Abstract: Refrigeration circuit (1a) comprising in the direction of flow of a circulating refrigerant: a compressor unit (2) comprising at least one compressor (2a, 2b, 2c); a heat rejecting heat exchanger/gas cooler (4); a high pressure expansion device (6); a receiver (8); an expansion device (10); an evaporator (12); and a low pressure gas-liquid-separation unit comprising at least two collecting containers (32, 34) which are configured for alternately separating a liquid phase portion from the refrigerant leaving the evaporator (12) and delivering the separated liquid refrigerant back to the receiver (8).Type: GrantFiled: March 31, 2016Date of Patent: January 4, 2022Assignee: CARRIER CORPORATIONInventor: Sascha Hellmann
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Publication number: 20210348810Abstract: An ejector refrigeration circuit 1 including: a two-phase circuit 2 including: a heat rejection heat exchanger 12 including an inlet 12a and an outlet 12b; and an ejector 14 including a high pressure inlet 14a, a low pressure inlet 14b and an outlet 14c; the ejector high pressure inlet 14a is coupled to the heat rejection heat exchanger outlet 12b; and an evaporator 18 including an inlet 18a and an outlet 18b; the outlet 18b of the evaporator 18 is coupled to the low pressure inlet 14b of the ejector 14; and the ejector refrigeration circuit 1 further including a vapour quality sensor 20 positioned at the outlet 12b of the heat rejection heat exchanger 12.Type: ApplicationFiled: December 10, 2020Publication date: November 11, 2021Inventor: Sascha Hellmann
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Publication number: 20210247108Abstract: Refrigeration systems are described. The systems include a compression device, a heat rejecting heat exchanger, an ejector, and first and second expansion devices with respective heat absorbing heat exchangers. The ejector is arranged to receive refrigerant fluid from the heat rejecting heat exchanger at a high pressure inlet of the ejector. Fluid pathways extend from an outlet of the ejector into a branched flow path to provide flows of refrigerant from the ejector to the first and second expansion devices. The first heat absorbing heat exchanger provides cooling at a first temperature and refrigerant fluid from the outlet of the first heat absorbing heat exchanger is directed to a low pressure inlet of the ejector. The second heat absorbing heat exchanger provides cooling at a second temperature and refrigerant fluid from the outlet of the second heat absorbing heat exchanger is directed to the inlet of the compression device.Type: ApplicationFiled: December 18, 2020Publication date: August 12, 2021Inventors: Sascha Hellmann, Nicolas Pondicq Cassou
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Patent number: 10823461Abstract: An ejector refrigeration circuit comprises: a high pressure ejector circuit comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler having an inlet side and an outlet side; at least one ejector comprising a primary high pressure input port, a secondary low pressure input port, and an output port, the primary high pressure input port being fluidly connected to the outlet side of the heat rejecting heat exchanger/gas cooler; a receiver, having a liquid outlet, a gas outlet and an inlet, which is fluidly connected to the output port of the at least one ejector; at least one compressor having an inlet side and an outlet side, the inlet side of the at least one compressor being fluidly connected to gas outlet of the receiver.Type: GrantFiled: May 13, 2015Date of Patent: November 3, 2020Assignee: CARRIER CORPORATIONInventor: Sascha Hellmann
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Publication number: 20200333053Abstract: Cooling circuit section (2), intended for the circulation of a refrigerant, said cooling circuit section (2) comprising:—at least two compressor assemblies (30), fluidically connected in parallel, each compressor assembly (30) comprising:—a compressor (40) configured to receive a low-pressure refrigerant having a first pressure, and for increasing the pressure of the low-pressure refrigerant so as to produce a compressed refrigerant having a second pressure that is greater than the first pressure, the compressed refrigerant comprising oil,—an individual oil separator (42) comprising an inlet (58) fluidically connected to the compressor (40) so as to receive the compressed refrigerant from the compressor (40), each individual oil separator (42) being configured to separate a first fraction of oil from the compressed refrigerant, the cooling circuit section (2) further comprising a common oil separator (32).Type: ApplicationFiled: January 12, 2018Publication date: October 22, 2020Inventors: Sascha Hellmann, Nicolas Pondicq-Cassou, Philippe Gastaldi, Micael Antonsson, Barnabe Landron
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Patent number: 10801757Abstract: A refrigeration system (1) has A) an ejector circuit (3) comprising: Aa) a high pressure compressor unit (2) comprising at least one compressor (2a, 2b, 2c, 2d); Ab) a heat rejecting heat exchanger/gas cooler (4); Ac) an ejector (6); Ad) a receiver (8) having a gas outlet (8b) which is connected to an inlet of the high pressure compressor unit (2).Type: GrantFiled: July 9, 2014Date of Patent: October 13, 2020Assignee: CARRIER CORPORATIONInventor: Sascha Hellmann
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Patent number: 10724771Abstract: An ejector refrigeration circuit comprises a high pressure ejector circuit comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler having an inlet side and an outlet side; at least two variable ejectors (6, 7) with different capacities connected in parallel, each of the variable ejectors comprising a primary high pressure input port, a secondary low pressure input port and an output port; wherein the primary high pressure input ports of the at least two variable ejectors are fluidly connected to the outlet side of the heat rejecting heat exchanger/gas cooler; a receiver, having an inlet, a liquid outlet, and a gas outlet, wherein the inlet is fluidly connected to the output ports of the at least two variable ejectors; at least one compressor having an inlet side and an outlet side.Type: GrantFiled: May 12, 2015Date of Patent: July 28, 2020Assignee: CARRIER CORPORATIONInventors: Sascha Hellmann, Christoph Kren
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Patent number: 10598416Abstract: A refrigeration cycle (1) comprises in the direction of flow of a circulating refrigerant: a compressor unit (2); an oil separation device (4) which is configured for separating oil from an refrigerant-oil-mixture leaving the compressor unit (2); at least one gas cooler/condenser (6); and at least one evaporator (10) having an expansion device (8) connected upstream thereof.Type: GrantFiled: November 4, 2013Date of Patent: March 24, 2020Assignee: CARRIER CORPORATIONInventor: Sascha Hellmann
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Patent number: 10352606Abstract: A cooling system comprises a refrigeration circuit (1) circulating a refrigerant and comprising in the flow direction of the refrigerant at least one compressor (2a, 2b, 2c, 2d); at least one condenser (4); at least one expansion device (8, 10); and at least one evaporator (11) for providing a cooling capacity.Type: GrantFiled: April 27, 2012Date of Patent: July 16, 2019Assignee: CARRIER CORPORATIONInventors: Sascha Hellmann, Hans-Joachim Huff
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Publication number: 20190086130Abstract: Refrigeration circuit (1a) comprising in the direction of flow of a circulating refrigerant: a compressor unit (2) comprising at least one compressor (2a, 2b, 2c); a heat rejecting heat exchanger/gas cooler (4); a high pressure expansion device (6); a receiver (8); an expansion device (10); an evaporator (12); and a low pressure gas-liquid-separation unit comprising at least two collecting containers (32, 34) which are configured for alternately separating a liquid phase portion from the refrigerant leaving the evaporator (12) and delivering the separated liquid refrigerant back to the receiver (8).Type: ApplicationFiled: March 31, 2016Publication date: March 21, 2019Inventor: Sascha Hellmann
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Publication number: 20180142927Abstract: An ejector refrigeration circuit (1) comprises a high pressure ejector circuit (3) comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler (4) having an inlet side (4a) and an outlet side (4b); at least two variable ejectors (6, 7) with different capacities connected in parallel, each of the variable ejectors (6, 7) comprising a primary high pressure input port (6a, 7a), a secondary low pressure input port (6b, 7b) and an output port (6c, 7c); wherein the primary high pressure input ports (6a, 7a) of the at least two variable ejectors (6, 7) are fluidly connected to the outlet side (4b) of the heat rejecting heat exchanger/gas cooler (4); a receiver (8), having an inlet (8a), a liquid outlet (8c), and a gas outlet (8b), wherein the inlet (8a) is fluidly connected to the output ports (6c, 7c) of the at least two variable ejectors (6, 7); at least one compressor (2a, 2b, 2c) having an inlet side (21a, 21 b, 21c) and an outlet side (22a, 22b, 22c), the inlet sType: ApplicationFiled: May 12, 2015Publication date: May 24, 2018Inventors: Sascha Hellmann, Christoph Kren
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Patent number: 9970695Abstract: An oil separation device (14) for separating oil from a refrigerant-oil-mixture in a refrigeration cycle (1), the oil separation device (14) comprises a first refrigerant conduit having at least a first portion (16) with a first diameter (d1); a second refrigerant conduit arranged downstream of and connected to the first refrigerant conduit, the second refrigerant conduit having at least a second portion with a second diameter (d2) being smaller than the first diameter (d1); wherein the second portion (18) of the second refrigerant conduit having the second diameter (d2) extends into the first portion (16) of the first refrigerant conduit forming an oil separation pocket (32) between the outer diameter of the second portion (18) and the inner diameter of the first portion (16); and a suction line (20) having an inlet end (19), which opens into the oil separation pocket (32) and is configured to suck oil from the oil separation pocket (32).Type: GrantFiled: July 19, 2011Date of Patent: May 15, 2018Assignee: CARRIER CORPORATIONInventors: Sascha Hellmann, Alexander Tambovtsev
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Publication number: 20180066872Abstract: An ejector refrigeration circuit comprises: a high pressure ejector circuit comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler having an inlet side and an outlet side; at least one ejector comprising a primary high pressure input port, a secondary low pressure input port, and an output port, the primary high pressure input port being fluidly connected to the outlet side of the heat rejecting heat exchanger/gas cooler; a receiver, having a liquid outlet, a gas outlet and an inlet, which is fluidly connected to the output port of the at least one ejector; at least one compressor having an inlet side and an outlet side, the inlet side of the at least one compressor being fluidly connected to gas outlet of the receiver.Type: ApplicationFiled: May 13, 2015Publication date: March 8, 2018Inventor: Sascha Hellmann
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Publication number: 20170159977Abstract: A refrigeration system (1) has A) an ejector circuit (3) comprising: Aa) a high pressure compressor unit (2) comprising at least one compressor (2a, 2b, 2c, 2d); Ab) a heat rejecting heat exchanger/gas cooler (4); Ac) an ejector (6); Ad) a receiver (8) having a gas outlet (8b) which is connected to an inlet of the high pressure compressor unit (2).Type: ApplicationFiled: July 9, 2014Publication date: June 8, 2017Inventor: Sascha Hellmann
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Patent number: 9500395Abstract: A refrigeration circuit is disclosed circulating a refrigerant and comprising in the direction of flow of the refrigerant a compressor (2); at least one condenser (14, 16) for rejecting heat to ambient air; an expansion device (8); and an evaporator (10). The refrigeration circuit further comprises a collecting container (12), the output of which being connected to the expansion device (8); a heat rejecting heat exchanger (4) for heat exchange of the refrigerant to a heat pump system, the output of the heat rejecting heat exchanger (4) being connected to the collecting container (12); and means (V1, V2) for connecting the heat rejecting heat exchanger (4) or at least one of the condenser(s) (14, 16) to the output of the compressor (2) depending on the availability of cooling power at the heat rejecting heat exchanger (4).Type: GrantFiled: July 5, 2011Date of Patent: November 22, 2016Assignee: CARRIER CORPORATIONInventors: Christian Scheumann, Sascha Hellmann
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Publication number: 20160238294Abstract: A refrigeration cycle (1) comprises in the direction of flow of a circulating refrigerant: a compressor unit (2); an oil separation device (4) which is configured for separating oil from an refrigerant-oil-mixture leaving the compressor unit (2); at least one gas cooler/condenser (6); and at least one evaporator (10) having an expansion device (8) connected upstream thereof.Type: ApplicationFiled: November 4, 2013Publication date: August 18, 2016Inventor: Sascha Hellmann
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Publication number: 20160231040Abstract: A refrigeration circuit (1) configured for circulating a refrigerant an comprises in the direction of flow of the refrigerant: at least one compressor (2a, 2b, 2c, 2d); at least one heat recovery heat exchanger (4); at least one gas cooler/condenser (10); at least one evaporator associated expansion device (18); at least one receiver (14); and at least one evaporator (20). The refrigeration circuit (1) further comprises a gas/liquid separator (8) having a refrigerant inlet line (7) fluidly connected to an outlet-side of the at least one heat recovery heat exchanger (4); an gaseous phase outlet line (9) fluidly connected to an inlet side of the at least one gas cooler/condenser (10); and an liquid phase outlet line (13) fluidly connected to the receiver (14).Type: ApplicationFiled: September 19, 2013Publication date: August 11, 2016Inventor: Sascha Hellmann
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Publication number: 20150233624Abstract: A cooling system comprises a refrigeration circuit (1) circulating a refrigerant and comprising in the flow direction of the refrigerant at least one compressor (2a, 2b, 2c, 2d); at least one condenser (4); at least one expansion device (8, 10); and at least one evaporator (11) for providing a cooling capacity.Type: ApplicationFiled: April 27, 2012Publication date: August 20, 2015Inventors: Sascha Hellmann, Hans-Joachim Huff
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Publication number: 20140165646Abstract: An oil separation device (14) for separating oil from a refrigerant-oil-mixture in a refrigeration cycle (1), the oil separation device (14) comprises a first refrigerant conduit having at least a first portion (16) with a first diameter (d1); a second refrigerant conduit arranged downstream of and connected to the first refrigerant conduit, the second refrigerant conduit having at least a second portion with a second diameter (d2) being smaller than the first diameter (d1); wherein the second portion (18) of the second refrigerant conduit having the second diameter (d2) extends into the first portion (16) of the first refrigerant conduit forming an oil separation pocket (32) between the outer diameter of the second portion (18) and the inner diameter of the first portion (16); and a suction line (20) having an inlet end (19), which opens into the oil separation pocket (32) and is configured to suck oil from the oil separation pocket (32).Type: ApplicationFiled: July 19, 2011Publication date: June 19, 2014Inventors: Sascha Hellmann, Alexander Tambovtsev