US4290275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump water heater
Assignee: Whirlpool International BV
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Filing: 1979-09-14
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Granted: 1981-09-22
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Expires: 1999-09-14
Abstract
Abstract There is provided a water storage heater having a heat pump including a compressor, a condenser and an evaporator. The condenser is arranged in heat relationship with a wall of an inner hot-water container. An outer shell is spaced from and surrounds the inner container to provide an interspace, at least part of the outer shell being constituted by the evaporator. Apertures are also provided in the outer shell to provide for air circulation through the interspace.
Inventors
- 👤 Paulus J. Disco
- 👤 Ernesto Quargentan
- 👤 Pietro Santalucia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:34
CPC Classifications
F; F24; F24H; F24H4/00; F24H4/02; F24H4/04; F25; F25B; F25B29/00; F25B29/003; F25B30/00; F25B30/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A water storage heater comprising a heat pump including a compressor, a condenser and an evaporator connected in a closed circuit; a vertically disposed inner hot-water container having a cold water inlet and a hot water outlet, said condenser being arranged in heat relationship with a wall of said inner container; and an outer shell spaced from and surrounding said inner container to provide an interspace, at least a part of said outer shell being constituted by said evaporator, said outer shell being provided with apertures.
Claim 2
Dependent Claim
86 words
A water storage heater comprising a heat pump including a compressor, a condenser and an evaporator connected in a closed circuit; a vertically disposed inner hot-water container having a cold water inlet and a hot water outlet, said condenser being arranged in heat relationship with a wall of said inner container; and an outer shell spaced from and surrounding said inner container to provide an interspace, at least a part of said outer shell being constituted by said evaporator, said outer shell being provided with apertures.
Claim 3
Dependent Claim
38 words
A water heater according to claim 1, which includes a vertical baffle dividing the interspace into two parts communicating with each other at their lower ends by way of a passage, and a fan disposed in said passage.
Claim 4
Dependent Claim
27 words
A water heater according to claim 1 or 2, in which the outer shell is formed from two superimposed plates defining a coil channel comprising the evaporator.
Claim 5
Dependent Claim
41 words
A water heater according to claim 1 or 2, which includes a support base for the outer shell adjacent the compressor, and a conduit between the outlet of the condenser and the inlet of the evaporator arranged on said support base.
Claim 6
Dependent Claim
19 words
A water heater according to claim 1 or 2, in which the inner container is surrounded by thermal insulation.
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |