# US 12,222,165 B2 · Apparatus for transferring heat from a heat source to air > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,165 B2 - Document ID: US12222165B2 - Status: Granted - Kind: B2 - Application number: 17/831,230 - Filed: 2022-06-02 - Published: 2022-09-15 - Granted: 2025-02-11 - Earliest claimed: 2019-12-02 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Fredrik Ohlsson; Vadim Tsoi - Web page: https://patentgrep.com/patent/US12222165B2 ## CPC - F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence)} - F28D 15/0275: {Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores} - H05K 7/20336: {Heat pipes, e.g. wicks or capillary pumps} - 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) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An apparatus for transferring heat from a heat source to air while the apparatus is connected to the heat source is provided. The apparatus has a heat sink comprising a heat sink base and a plurality of primary fins connected to the heat sink base. The apparatus includes a heat sink front. The heat sink base is configured to be thermally coupled to the heat source. Each primary fin of the plurality of primary fins has one or more conduits. The heat sink base includes a first chamber. The first chamber and the conduits together form a common space sealed off from the air surrounding the apparatus. The first chamber and the conduits together enclose a heat-carrying fluid in the common space formed by the first chamber and the conduits. A network access node for a wireless communication system is provided. The network access node comprises the above-described apparatus. ## Claims ### Claim 1 An apparatus for transferring heat from a heat source to air in a state where the apparatus is connected to the heat source, the apparatus comprising: a heat sink comprising a heat sink base and a plurality of primary fins connected to the heat sink base; and a heat sink front, wherein the heat sink base is configured to be thermally coupled to the heat source, wherein each primary fin of the plurality of primary fins comprises one or more conduits, wherein the heat sink base comprises a first chamber, wherein the first chamber and the one or more conduits together form a common space sealed off from the ambient air surrounding the apparatus, wherein the first chamber and the one or more conduits together enclose a heat-carrying fluid in the common space formed by the first chamber and the one or more conduits, wherein, at the heat sink front, the one or more conduits of a first primary fin of the plurality of primary fins are sealed off from the one or more conduits of a second primary fin of the plurality of primary fins, wherein the first primary fin opens into a first condenser chamber and the second primary fin opens into a second condenser chamber, and wherein flaps are provided between the first condenser chamber and the second condenser chamber. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the first chamber and the one or more conduits form the common space such that the heat is carried by the fluid from the first chamber to the one or more conduits. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the first chamber and the one or more conduits form the common space such that the heat is carried by the fluid from the first chamber to the heat sink front via the one or more conduits. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the heat sink base defines a hot interface, and wherein the apparatus at the hot interface is configured to turn a liquid of the fluid inside the common space into a vapour by allowing the liquid to absorb the heat from the hot interface. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the first chamber comprises a shell, and wherein the apparatus at the hot interface is configured to turn the liquid of the fluid inside the common space into the vapour by allowing the liquid to absorb the heat from the shell of the first chamber. ### Claim 6 (depends on 4) The apparatus according to claim 4, wherein the first chamber and the one or more conduits form the common space such that the vapour of the fluid travels from the first chamber of the heat sink base, along the one or more conduits and toward the heat sink front. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein each primary fin of the plurality of primary fins comprises a surface for condensing a vapour of the fluid inside the common space into a liquid. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the first chamber and the one or more conduits form the common space such that the liquid of the fluid returns back to the first chamber by way of one of a capillary action, gravity and a pressure difference. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the heat sink front comprises a second chamber, wherein the first chamber, the one or more conduits and the second chamber together form the common space sealed off from the ambient air surrounding the apparatus, and wherein the first chamber, the one or more conduits and the second chamber together enclose the heat-carrying fluid in the common space formed by the first chamber, the one or more conduits and the second chamber. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the first chamber, the one or more conduits and the second chamber form the common space such that a vapour of the fluid travels from the first chamber to the second chamber via the one or more conduits. ### Claim 11 (depends on 9) The apparatus according to claim 9, wherein the heat sink front comprises a surface for condensing the vapour of the fluid inside the common space into a liquid. ### Claim 12 (depends on 1) The apparatus according to claim 1, wherein the heat sink base comprises a third chamber, wherein the first chamber, the one or more conduits and the third chamber together form the common space sealed off from the ambient air surrounding the apparatus, wherein the first chamber, the one or more conduits and the third chamber together enclose the heat-carrying fluid in the common space formed by the first chamber, the one or more conduits and the third chamber, wherein, at the heat sink base, the one or more conduits of each primary fin of a first group of the plurality of primary fins are fluidly connected to the first chamber but sealed off from the third chamber, and wherein, at the heat sink base, the one or more conduits of each primary fin of a second group of the plurality of primary fins are fluidly connected to the third chamber but sealed off from the first chamber. ### Claim 13 (depends on 1) The apparatus according to claim 1, wherein each primary fin of the plurality of primary fins extends from the heat sink base to the heat sink front. ### Claim 14 A network access node for a wireless communication system, wherein the network access node comprises an apparatus for transferring heat from a heat source to ambient air while the apparatus is connected to the heat source, and wherein the apparatus comprises: a heat sink comprising a heat sink base and a plurality of primary fins connected to the heat sink base; and a heat sink front, wherein the heat sink base is configured to be thermally coupled to the heat source, wherein each primary fin of the plurality of primary fins comprises one or more conduits, wherein the heat sink base comprises a first chamber, wherein the first chamber and the one or more conduits together form a common space sealed off from the ambient air surrounding the apparatus, wherein the first chamber and the one or more conduits together enclose a heat-carrying fluid in the common space formed by the first chamber and the one or more conduits, wherein, at the heat sink front, the one or more conduits of a first primary fin of the plurality of primary fins are sealed off from the one or more conduits of a second primary fin of the plurality of primary fins, wherein the first primary fin opens into a first condenser chamber and the second primary fin opens into a second condenser chamber, and wherein flaps are provided between the first condenser chamber and the second condenser chamber. ### Claim 15 (depends on 14) The network access node according to claim 14, wherein the first chamber and the one or more conduits form the common space such that the heat is carried by the fluid from the first chamber to the one or more conduits. ### Claim 16 (depends on 14) The network access node according to claim 14, wherein the first chamber and the one or more conduits form the common space such that the heat is carried by the fluid from the first chamber to the heat sink front via the one or more conduits.