US3797270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump with two fluid circuits
Assignee: PHYSIKALISCH TECH ENTWICKLUNGS
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Filing: 1973-06-26
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Granted: 1974-03-19
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Expires: 1993-06-26
Abstract
Abstract A reversible heat pump, to be used for cooling or heating a space bounded by a wall, has two rotary heat exchangers coaxially mounted on opposite sides of that wall and interconnected by a hub traversing same. The hub includes a highly heat-conductive partition between the fluid-circulation systems of the two heat exchangers. A rotary compressor, forming part of the exterior circulation system, has a housing rigid with the external heat exchanger and an impeller freely rotatable on a shaft of that heat exchanger, this impeller being secured to an armature of a squirrel-cage motor whose field windings are fixedly mounted on the supporting wall structure. The motor armature and the compressor are enshrouded by a magnetically permeable cowl forming a rotary chamber which is filled with a primary heatcarrying fluid, such as Freon, as well as lubricating oil and which communicates with a radiator drum on the periphery of the external heat exchanger. A similar radiator drum on the periphery of the internal heat exchanger is permeated by a secondary heatcarrying fluid, such as a low-boiling alcohol, circulating along the thermally conductive partition in heat-transfer relationship with the primary fluid.
Inventors
- 👤 N Laing
- 👤 L Ludin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
F; F25; F25B; F25B13/00; F25B3/00; F25B31/00; F25B31/002
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
234 words
A heat pump divided into two portions emplaceable on opposite sides of a wall for maintaining a temperature differential thereacross, comprising: wall-engaging support means; a first rotary heat exchanger including a hollow first hub journaled in said support means and a first radiator drum on said first hub provided with a first set of channels for conducting a first heat-carrying fluid in heat-exchanging relationship with ambient air; a second rotary heat exchanger including a holloW second hub journaled in said support means coaxially with said first hub and a second radiator drum on said second hub provided with a second set of channels for conducting a second heat-carrying fluid in heat-exchanging relationship with ambient air, said hubs being coupled for joint rotation and contacting each other along a thermally conductive partition; first conduit means in said first heat exchanger for circulating said first fluid in a closed first flow path between said first set of channels and said partition; second conduit means in said second heat exchanger for circulating said second fluid in a closed second flow path between said second set of channels and said partition in heattransferring relationship with said first fluid by way of said partition; thermodynamically effective means in said first heat exchanger for changing the temperature of said first fluid traversing said first flow path; and drive means for rotating said heat exchangers with reference to said support means.
Claim 2
Dependent Claim
234 words
A heat pump divided into two portions emplaceable on opposite sides of a wall for maintaining a temperature differential thereacross, comprising: wall-engaging support means; a first rotary heat exchanger including a hollow first hub journaled in said support means and a first radiator drum on said first hub provided with a first set of channels for conducting a first heat-carrying fluid in heat-exchanging relationship with ambient air; a second rotary heat exchanger including a holloW second hub journaled in said support means coaxially with said first hub and a second radiator drum on said second hub provided with a second set of channels for conducting a second heat-carrying fluid in heat-exchanging relationship with ambient air, said hubs being coupled for joint rotation and contacting each other along a thermally conductive partition; first conduit means in said first heat exchanger for circulating said first fluid in a closed first flow path between said first set of channels and said partition; second conduit means in said second heat exchanger for circulating said second fluid in a closed second flow path between said second set of channels and said partition in heattransferring relationship with said first fluid by way of said partition; thermodynamically effective means in said first heat exchanger for changing the temperature of said first fluid traversing said first flow path; and drive means for rotating said heat exchangers with reference to said support means.
Claim 3
Dependent Claim
30 words
A heat pump as defined in claim 1 wherein said first and second hubs have telescopically interfitted tubular wall portions centered on the hub axis and together constituting said partition.
Claim 4
Dependent Claim
39 words
A heat pump as defined in claim 2 wherein at least one of said wall portions has a contact surface in engagement with the other wall portion provided with a lower-melting metallic coating fusion-bonded onto said other wall portion.
Claim 5
Dependent Claim
15 words
A heat pump as defined in claim 2 wherein said wall portions are substantially frustoconical.
Claim 6
Dependent Claim
36 words
A heat pump as defined in claim 2 wherein said support means comprises a pair of spaced-apart mounting plates perpendicular to the hub axis, said wall portions being located in the space between said mounting plates.
Claim 7
Dependent Claim
47 words
A heat pump as defined in claim 1 wherein said first radiator drum is provided with a peripheral channel for accumulation of a liquid phase of said first fluid, said first conduit means including a capillary extending from said channel to the interior of said first hub.
Claim 8
Dependent Claim
32 words
A heat pump as defined in claim 1 wherein said first means includes at least one nozzle within said first hub trained upon said partition for discharging said first fluid onto same.
Claim 9
Dependent Claim
48 words
A heat pump as defined in claim 1, further comprising a collector for condensed ambient moisture underneath said second heat exchanger on said second support and drain means for said condensed moisture passing alongside said hubs from said collector to said first support for discharge into the atmosphere.
Claim 10
Dependent Claim
28 words
A heat pump as defined in claim 8 wherein said drain means terminates in the vicinity of said second radiator drum for directing said condensed moisture unto same.
Claim 11
Dependent Claim
78 words
A heat pump as defined in claim 1 wherein said drive means comprises an electric motor with a stator on said first support and with a rotatable armature inside said first hub electromagnetically entrainable by said stator, said thermodynamically effective means including a compressor with two relatively rotatable sections centered on the hub axis, one of said sections being coupled with said armature for joint rotation, the other of said sections being rigid with said first heat exchanger.
Claim 12
Dependent Claim
38 words
A heat pump as defined in claim 10 wherein said one of said sections is an impeller provided with vane means, said other of said sections being a housing entrainable by said impeller at a reduced rotary speed.
Claim 13
Dependent Claim
31 words
A heat pump as defined in claim 10 wherein said first hub comprises a magnetically permeable cowl separating said stator from said armature and enshrouding part of said first flow path.
Claim 14
Dependent Claim
14 words
A heat pump as defined in claim 12 wherein said cowl is spherically curved.
Claim 15
Dependent Claim
199 words
A heat pump divided into two portions emplaceable on opposite sides of a wall for maintaining a temperature differential thereacross, comprising: wall-engaging support means; a hub structure journaled in said support means; a first and a second rotary heat exchanger including a radiator drum prOvided with a set of channels for conducting a respective heat-carrying fluid in heat-exchanging relationship with ambient air; first and second conduit means in said first and second heat exchangers, respectively, for circulating those fluids through the channels of their radiator drums in closed first and second flow paths approaching each other in said hub structure closely enough to enable effective heat transfer between said fluids; a compressor in said first heat exchanger for densifying the fluid thereof traversing said first flow path in one direction while being bypassed by said first conduit means for passage in the opposite direction, said compressor having two relatively rotatable sections located in said hub structure and centered on the axis thereof; and drive means for rotating one of said sections with reference to said support means, the other of said sections being rigid with said first heat exchanger for laggingly rotating same about said axis by fluidic entrainment.
Claim 16
Dependent Claim
199 words
A heat pump divided into two portions emplaceable on opposite sides of a wall for maintaining a temperature differential thereacross, comprising: wall-engaging support means; a hub structure journaled in said support means; a first and a second rotary heat exchanger including a radiator drum prOvided with a set of channels for conducting a respective heat-carrying fluid in heat-exchanging relationship with ambient air; first and second conduit means in said first and second heat exchangers, respectively, for circulating those fluids through the channels of their radiator drums in closed first and second flow paths approaching each other in said hub structure closely enough to enable effective heat transfer between said fluids; a compressor in said first heat exchanger for densifying the fluid thereof traversing said first flow path in one direction while being bypassed by said first conduit means for passage in the opposite direction, said compressor having two relatively rotatable sections located in said hub structure and centered on the axis thereof; and drive means for rotating one of said sections with reference to said support means, the other of said sections being rigid with said first heat exchanger for laggingly rotating same about said axis by fluidic entrainment.
Claim 17
Dependent Claim
50 words
A heat pump as defined in claim 14 wherein said drive means comprises an electric motor with a stator on said support means and with a rotatable armature inside said hub structure electromagnetically entrainable by said stator, said one of said sections being coupled with said armature for joint rotation.
Claim 18
Dependent Claim
39 words
A heat pump as defined in claim 15 wherein said hub structure forms a chamber about said compressor included in said first flow path, said chamber being bounded by a magnetically permeable cowl separating said armature from said stator.
Claim 19
Dependent Claim
38 words
A heat pump as defined in claim 16 wherein said cowl is substantially spherically curved about said axis, said armature comprising a squirrel-cage rotor with conductors closely spaced from said cowl and curved along the inner surface thereof.
Claim 20
Dependent Claim
149 words
A thermogenic device comprising: stationary support means; a rotatable body provided with a shaft journaled in said support means, said body forming a hermetically sealed enclosure about a closed flow path for a heat-carrying fluid; fluid-circulating means in said body including a compressor with two relatively rotatable sections in said flow path centered on said shaft, one of said sections being freely rotatable on said shaft, the other of said sections being rigid with said body; and an electric motor with a stator on said support means and with a rotor in said enclosure electromagnetically entrainable by said stator, said one of said sections being mechanically coupled with said rotor for joint rotation at a relatively high speed whereby said other of said sections is fluidically driven together with said body at a relatively low speed, said enclosure including a magnetically permeable shell separating said stator from said rotor.
Claim 21
Dependent Claim
149 words
A thermogenic device comprising: stationary support means; a rotatable body provided with a shaft journaled in said support means, said body forming a hermetically sealed enclosure about a closed flow path for a heat-carrying fluid; fluid-circulating means in said body including a compressor with two relatively rotatable sections in said flow path centered on said shaft, one of said sections being freely rotatable on said shaft, the other of said sections being rigid with said body; and an electric motor with a stator on said support means and with a rotor in said enclosure electromagnetically entrainable by said stator, said one of said sections being mechanically coupled with said rotor for joint rotation at a relatively high speed whereby said other of said sections is fluidically driven together with said body at a relatively low speed, said enclosure including a magnetically permeable shell separating said stator from said rotor.
Claim 22
Dependent Claim
31 words
A thermogenic device as defined in claim 18 wherein said one of said sections is an impeller provided with vane means exerting a reaction torque upon said other of said sections.
Claim 23
Dependent Claim
24 words
A thermogenic device as defined in claim 18, further comprising brake means on said support means for controlling the rotary speed of said body.
Claim 24
Dependent Claim
16 words
A thermogenic device as defined in claim 20 wherein said brake means comprises an eddy-current generator.
Claim 25
Dependent Claim
14 words
A thermogenic device as defined in claim 18 wherein said shell is spherically curved.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |