Patent US4091547A successfully refreshed from Google Patents.
US4091547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat recovery means for drying apparatus
Assignee: JOSGLADE Ltd
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Filing: 1977-03-28
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Granted: 1978-05-30
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Expires: 1997-03-28
Abstract
Abstract Heat recovery means in drying apparatus such as a kiln consists of a heat exchanger located at the moist air outlet of the chamber of the drying apparatus for contact with exhaust moist air therefrom and a further heat exchanger located at the air inlet to the drying apparatus for contact of incoming air therewith, the heat exchangers being connected in circuit by pipework for the circulation of refrigerant between them in conveying heat energy by vaporized refrigerant from the heat exchanger located at the moist air outlet to that located at the inlet for transfer of said heat energy on condensation of the refrigerant to air entering the inlet.
Inventors
- 👤 Barry Rupert Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:01
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/001; F26B23/002; F26B23/005; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F28D21/00; F28D21/0001; F28D21/0014; F26B2210/00; F26B2210/16; Y; Y02; Y02B; Y02B30/00; Y02B30/52; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S165/00; Y10S165/909
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
Heat recovery means in combination with drying apparatus such as kiln comprising a chamber for receiving supported therein material such as grain to be dried and having an inlet for air and an outlet for moist air; means for heating and introducing air into the chamber; a heat exchanger located at the moist air outlet of the chamber for contact with exhaust moist air therefrom; a further heat exchanger located at the air inlet for contact of incoming air therewith; and pipework connecting said heat exchangers in circuit for the circulation of a refrigerant between said heat exchangers in conveying heat energy by vaporised refrigerant from the heat exchanger located at said outlet to that located at the inlet for transfer of said heat energy on condensation of the refrigerant to air entering the inlet.
Claim 2
Dependent Claim
135 words
Heat recovery means in combination with drying apparatus such as kiln comprising a chamber for receiving supported therein material such as grain to be dried and having an inlet for air and an outlet for moist air; means for heating and introducing air into the chamber; a heat exchanger located at the moist air outlet of the chamber for contact with exhaust moist air therefrom; a further heat exchanger located at the air inlet for contact of incoming air therewith; and pipework connecting said heat exchangers in circuit for the circulation of a refrigerant between said heat exchangers in conveying heat energy by vaporised refrigerant from the heat exchanger located at said outlet to that located at the inlet for transfer of said heat energy on condensation of the refrigerant to air entering the inlet.
Claim 3
Dependent Claim
67 words
Heat recovery means in combination with drying apparatus according to claim 1 wherein the heat exchanger which is located at the moist air outlet of the chamber is situated at a lower position to that of the further heat exchanger which is located at the air inlet of the chamber in order to cause self motivating circulation of refrigerant along the connecting pipework between the heat exchangers.
Claim 4
Dependent Claim
31 words
Heat recovery means in combination with drying apparatus according to claim 1 wherein at least one receiver for liquid refrigerant is interconnected by the said connecting pipework with the heat exchangers.
Claim 5
Dependent Claim
42 words
Heat recovery means in combination with drying apparatus according to claim 1 wherein a pump is interconnected by the said connecting pipework with the heat exchangers for at least assisting the circulation of refrigerant along said connecting pipework between the heat exchangers.
Claim 6
Dependent Claim
45 words
Heat recovery means in combination with drying apparatus according to claim 4 wherein the pump is arranged to effect one way return flow of condensed refrigerant via a non-return valve to the heat exchanger which is located at the moist air outlet of the chamber.
Claim 7
Dependent Claim
44 words
Heat recovery means in combination with drying apparatus according to claim 4 wherein electric motor drive to the pump is controlled by switch means responsive to the level of liquid refrigerant in the heat exchanger located at the moist air outlet of the chamber.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |