# US 5,345,998 A · Cooling device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,345,998 A - Document ID: US5345998A - Status: Granted - Kind: A - Application number: 08/090,281 - Filed: 1993-07-08 - Granted: 1994-09-13 - Earliest claimed: 1992-11-27 - Assignees: Itoh Research & Development Laboratory Co., Ltd. - Inventors: Akira Itoh - Web page: https://patentgrep.com/patent/US5345998A ## CPC - F28D 15/0208: {using moving tubes} - F28D 15/0275: {Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores} - F28D 15/04: with tubes having a capillary structure - Y10S 165/916: Oil cooler - 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) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A cooling device includes a liquid chamber having a liquid inlet and a liquid outlet. A bent pipe includes a straight tubular heat pipe component provided extending from the inside to the outside of the liquid chamber. A spiral heat pipe component communicating with the straight tubular heat pipe component and extending to surround the same spirally is provided. In an internal space where the spiral heat pipe component and the straight tubular heat pipe component communicate with each other, a working fluid serving as a heat carrier is sealed. An ultrasonic motor for rotating integrally the straight tubular heat pipe component and the spiral heat pipe component is provided. A radiating fin structure is provided on the straight tubular heat pipe component positioned outside the liquid chamber. As a result, it is possible to make the device lighter, smaller and more reliable without decreasing the cooling performance as compared to conventional cooling devices. ## Claims ### Claim 1 A cooling device for cooling liquid, comprising: a liquid chamber having an inlet through which said liquid is supplied, and an outlet through which said liquid is discharged; a heat pipe comprising a straight tubular heat pipe component having a first internal space and extending from the inside to the outside of said liquid chamber and a spiral heat pipe component having a second internal space and being disposed in said liquid chamber, said second internal space communicating with said first internal space of said straight tubular heat pipe component and said spiral heat pipe component extending to surround spirally said straight tubular heat pipe component; said cooling device further comprising a working fluid sealed within said first and second internal spaces through which said straight tubular heat pipe component and said spiral heat pipe component communicate with each other; and driving means for rotating integrally said straight tubular heat pipe component and said spiral heat pipe component. ### Claim 2 (depends on 1) The cooling device as recited in claim 1, further comprising a flow control disk arranged at said outlet of said liquid chamber. ### Claim 3 (depends on 2) The cooling device as recited in claim 2, wherein a penetrating hole for controlling the flow rate of said liquid is provided in said control disk. ### Claim 4 (depends on 3) The cooling device as recited in claim 3, wherein a plurality of said holes is provided and at least one of said holes is a slit extending radially. ### Claim 5 (depends on 1) The cooling device as recited in claim 1, wherein said driving means is an ultrasonic motor, said ultrasonic motor being provided at an end of said liquid chamber to encircle said straight tubular heat pipe component. ### Claim 6 (depends on 1) The cooling device as recited in claim 1, wherein said straight tubular heat pipe component includes a heat radiating portion positioned outside said liquid chamber and a heat receiving portion positioned inside said liquid chamber, and a capillary tube is provided in said first internal space of said straight tubular heat pipe component for collecting said working fluid condensed in said heat radiating portion to feed back said condensed working fluids to said heat receiving portion. ### Claim 7 (depends on 6) The cooling device as recited in claim 6, wherein said capillary tube has one end arranged at said heat radiating portion and one end arranged in said heat receiving portion near said inlet of said liquid chamber. ### Claim 8 (depends on 6) The cooling device as recited in claim 6, wherein said capillary tube comprises a tapered portion at one end of said capillary tube, said tapered portion making contact with an inner wall surface of said straight tubular heat pipe component near a transition between said heat receiving portion and said heat radiating portion and said tapered portion having an opening through which said working fluid passes. ### Claim 9 (depends on 1) The cooling device as recited in claim 1, further comprising a plurality of heat radiating fins extending radially from a portion of said straight tubular heat pipe component positioned outside said liquid chamber. ### Claim 10 (depends on 9) The cooling device as recited in claim 9, wherein a space communicating with said first internal space of said straight tubular heat pipe component is formed in the interior of said heat radiating fins. ### Claim 11 (depends on 9) The cooling device as recited in claim 9, wherein said heat radiating fins comprise a concave-convex structure on a surface of said heat radiating fins. ### Claim 12 (depends on 1) The cooling device as recited in claim 1, wherein a plurality of grooves is formed on an inner wall surface of at least one of said straight tubular heat pipe component and said spiral heat pipe component. ### Claim 13 A heat pipe comprising a straight tubular heat pipe component having a first internal space and including a heat receiving portion and a heat rejecting portion, said heat pipe further comprising a spiral heat pipe component having a second internal space communicating with said first internal space, said spiral heat pipe component disposed spirally around said heat receiving portion, said heat pipe component further comprising a working fluid sealed within said first and second internal spaces.