# US 10,375,860 B2 · Heat exchanger for cooling a switch cabinet and corresponding cooling arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,860 B2 - Document ID: US10375860B2 - Status: Granted - Kind: B2 - Application number: 14/392,021 - Filed: 2013-08-23 - Published: 2015-06-11 - Granted: 2019-08-06 - Earliest claimed: 2012-08-31 - Assignees: Rittal GmbH & Co. KG - Applicants: Rittal GmbH & Co. KG - Inventors: Juan Carlos Cacho Alonso - Web page: https://patentgrep.com/patent/US10375860B2 ## CPC - H05K 7/206: {Air circulating in closed loop within cabinets wherein heat is removed through air-to-air heat-exchanger} - F28D 1/0443: {Combination of units extending one beside or one above the other (F28D1/0452 takes precedence)} - F28D 1/0477: {the conduits being bent in a serpentine or zig-zag} - F28F 1/32: the means having portions engaging further tubular elements - H05K 7/20572: {within cabinets for removing heat from sub-racks, e.g. plenum} - H05K 7/20609: {Air circulating in closed loop within cabinets wherein heat is removed through air-to-liquid heat-exchanger} - H05K 7/20645: {within cabinets for removing heat from sub-racks} - H05K 7/207: {Thermal management, e.g. cabinet temperature control} - H05K 7/20781: {within cabinets for removing heat from server blades} - H05K 7/20827: {within rooms for removing heat from cabinets, e.g. air conditioning devices} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract The invention relates to a heat exchanger for cooling a switch cabinet, with a first line system for a first coolant and with a second line system, separated fluidically from the first line system, for a second coolant, in which the first and the second line system are coupled thermally to one another, and to a corresponding switch cabinet. ## Claims ### Claim 1 A heat exchanger for cooling a switch cabinet, with a first line system for a first coolant and with a second line system, separated fluidically from the first line system, for a second coolant, the first and the second line system being coupled thermally to one another, wherein the heat exchanger comprises a plurality of lamellae, adjacent lamellae forming between them an air flow duct through the heat exchanger, the air flow duct comprising an air flow direction through the heat exchanger, and one of the first and the second line systems being disposed behind the other of the first and second line systems in the air flow direction and being coupled thermally to one another via the plurality of lamellae. ### Claim 2 (depends on 1) The heat exchanger as claimed in claim 1, in which the lamellae are oriented parallel to one another. ### Claim 3 (depends on 1) The heat exchanger as claimed in claim 1, wherein there is an air flow direction in the heat exchanger and in which the first and the second line system are disposed directly or indirectly aligned with each other in the air flow direction through the heat exchanger. ### Claim 4 (depends on 1) The heat exchanger as claimed in claim 1, in which the first and the second line system have in each case a connection for a coolant forward flow and a connection for a coolant return flow. ### Claim 5 (depends on 1) The heat exchanger as claimed in claim 1, wherein the heat exchanger has two longitudinal ends, in which at least one of the line systems is routed through parallel pipe tracks which extend between the two longitudinal ends of the heat exchanger so that coolant is routed between a coolant forward flow and a cool end return flow, to prevent formation of siphons. ### Claim 6 (depends on 1) A cooling arrangement with a switch cabinet and with a cooling apparatus which has a first and a second heat exchanger as claimed in claim 1, the first heat exchanger being disposed in a first air passage with a first air inlet and with a first air outlet, which are open to an area surrounding the switch cabinet, and the second heat exchanger being disposed in a second air passage with a second air inlet and with a second air outlet, which are open to an interior of the switch cabinet, the first line system of the first heat exchanger forming with the first line system of the second heat exchanger a first closed coolant circuit, and the second line system of the first heat exchanger forming with the second line system of the second heat exchanger a second closed coolant circuit. ### Claim 7 (depends on 6) The cooling arrangement as claimed in claim 6, in which the first heat exchanger is disposed at least partially above the second heat exchanger, at least one of the two coolant circuits being a passive circuit. ### Claim 8 (depends on 6) The cooling arrangement as claimed in claim 6, wherein there is an air flow direction in each of the first and second heat exchangers and in which one of the two coolant circuits is a passive coolant circuit and the other an active coolant circuit, the first heat exchanger being disposed in the first air passage and the second heat exchanger being disposed in the second air passage, in such a way that the line system of the passive coolant circuit is disposed upstream of the line system of the active coolant circuit in the air flow direction of the heat exchangers. ### Claim 9 (depends on 1) A cooling arrangement with a switch cabinet and with a cooling apparatus which has a first and a second heat exchanger as claimed in claim 1, the first heat exchanger being disposed in a first air passage with a first air inlet and with a first air outlet, which are open to an area surrounding the switch cabinet, and the second heat exchanger being disposed in a second air passage with a second air inlet and with a second air outlet, which are open to an interior of the switch cabinet, in which either: 1) the first and the second line system of the first heat exchanger are connected in series, the series-connected line systems forming either with the first or with the second line system of the second heat exchanger a closed coolant circuit, and a coolant flowing through the other of the first or second line system of the second heat exchanger; or 2) the first and the second line system of the second heat exchanger are connected in series, the series-connected line systems forming either with the first or with the second line system of the first heat exchanger a closed coolant circuit, and a coolant flowing through the other of the first or second line system of the first heat exchanger. ### Claim 10 (depends on 9) The cooling arrangement as claimed in claim 9, in which the first heat exchanger is disposed at least partially above the second heat exchanger, the closed coolant circuit being a passive coolant circuit and the line system through which the coolant flows being an integral part of an active, preferably pump- or compressor-driven cooling circuit. ### Claim 11 (depends on 10) The cooling arrangement as claimed in claim 10, wherein the active cooling circuit is pump or compression driven. ### Claim 12 (depends on 10) The cooling arrangement as claimed in claim 10, in which the heat exchanger which has the line system through which the coolant flows is an evaporator or an air/water heat exchanger of the active cooling circuit and contemporaneously, when the line system through which the coolant flows is an integral part of the first heat exchanger, is a condenser of the passive cooling circuit or, when the line system through which the coolant flows is an integral part of the second heat exchanger, is an evaporator of the passive cooling circuit. ### Claim 13 (depends on 6) The cooling arrangement as claimed in claim 6, in which one of the two coolant circuits is a passive coolant circuit and the other is a compressor-driven coolant circuit, a compressor, a control means and an expansion means of the active coolant circuit either being bridged via a selectively openable and closable bypass line or being capable of assuming a state in which a coolant can pass through them with insignificant pressure loss. ### Claim 14 (depends on 1) The heat exchanger of claim 1, wherein the first line system is an integral part of a passive cooling circuit, and the second line system is an integral part of an active cooling circuit, wherein in the air flow direction the first line system is disposed upstream of the second line system. ### Claim 15 (depends on 14) The heat exchanger of claim 14, wherein the first line system is an integral part of a heatpipe cooling circuit, and the second line system is an integral part of a compressor driven cooling circuit or of a cold water set. ### Claim 16 A cooling arrangement including a switch cabinet and a cooling apparatus which has a first and a second heat exchanger for cooling a switch cabinet, each heat exchanger having a first line system for a first coolant and at least one second line system, separated fluidically from the first line system, for a second coolant, the first and the second line system being coupled thermally to one another, wherein the heat exchanger comprises a plurality of lamellae, adjacent lamellae forming between them an air flow duct through the heat exchanger, the air flow duct comprising an air flow direction through the heat exchanger, and the first and the second line system being disposed one behind the other in the air flow direction and being coupled thermally to one another via the plurality of lamellae, wherein: the first heat exchanger is disposed in a first air passage with a first air inlet and with a first air outlet, which are open to an area surrounding the switch cabinet, and the second heat exchanger is disposed in a second air passage with a second air inlet and with a second air outlet, which are open to an interior of the switch cabinet, the first line system of the first heat exchanger forming with the first line system of the second heat exchanger a first closed coolant circuit, and the second line system of the first heat exchanger forming with the second line system of the second heat exchanger a second closed coolant circuit. ### Claim 17 (depends on 16) The cooling arrangement as claimed in claim 16, in which the lamellae are oriented parallel to one another. ### Claim 18 (depends on 16) The cooling arrangement as claimed in claim 16, wherein there is an air flow direction in the heat exchanger and in which the first and the second line system are disposed directly or indirectly aligned with each other in the air flow direction through the heat exchanger. ### Claim 19 (depends on 16) The cooling arrangement heat exchanger as claimed in claim 16, in which the first and the second line system have in each case a connection for a coolant forward flow and for a coolant return flow. ### Claim 20 A heat exchanger for cooling a switch cabinet, with a first line system for a first coolant and with a second line system, separated fluidically from the first line system, for a second coolant, the first and the second line system being coupled thermally to one another, wherein the heat exchanger comprises a plurality of lamellae, adjacent lamellae forming between them an air flow duct through the heat exchanger, the air flow duct comprising an air flow direction through the heat exchanger, and one of the first and the second line systems being disposed behind the other of the first and second line systems in the air flow direction and being coupled thermally to one another via the plurality of lamellae, wherein the heat exchanger has a pair of longitudinal ends, and the lamellae are disposed centrally within the heat exchanger, spaced apart from the longitudinal ends of the heat exchanger.