Patent GB1508317A successfully refreshed from Google Patents.
Patent US4037649A successfully refreshed from Google Patents.
US4037649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and refrigeration system
Assignee: Individual
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Filing: 1975-04-04
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Granted: 1977-07-26
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Expires: 1995-04-04
Abstract
Abstract A combined air-heating and refrigeration system wherein the air temperature of a living area is maintained within a predetermined range. A conventional furnace isprovided with a heat exchanger for heating air carried within ducts which communicate air from within the living space for circulation past the furnace for heating. The refrigeration portion of the system may be either of the compression or of the absorption type. In the preferred embodiment an absorption type is used and comprises a generator for heating an absorbent and a refrigerant. The heated refrigerant is communicated to a condenser to cause the refrigerant to condense, and the condensed refrigerant is then expanded by a suitable expansion valve and communicated to an evaporator wherein the refrigeration process takes place. The refrigerant is then mixed with the absorber and recirculated to the generator by means of a circulation pump. Heat exchangers are provided for utilizing the heat generated by the furnace for heating the absorbent and refrigerant within the generator of the refrigeration system while the heat generated by the condenser during the condensation of the refrigerant is utilized to preheat the air being delivered from the living space for heating by the furnace.
Inventors
- 👤 Dale R. Hartka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:31
CPC Classifications
F; F25; F25B; F25B29/00; F25B29/006; F24; F24D; F24D5/00; F24D5/02; F24D5/04; F25B2400/00; F25B2400/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A combined air-heating and refrigeration system wherein the air temperature of a living space is maintained within a predetermined range, said air-heating portion of said system comprising: a furnace having a heat exchanger for heating air flowing thereby; first duct means for selectively admitting air from inside said living space for circulation past said furnace for heating said air; second duct means for selectively returning said air from said furnace to said living space; the refrigeration portion of said system comprising; a refrigerant; a condenser for condensing said refrigerant; an evaporator for evaporating said refrigerant; conduits interconnecting said elements to provide a circuit for said refrigerant; first heat exchanger means associated with said condenser for preheating the air passing through said first duct means, said refrigeration system being of the absorption type and further comprising: an absorbent; a generator for heating said absorbent when combined with said refrigerant; an absorber for combining said refrigerant and said absorbent; a pump for circulating said absorbent; conduits interconnecting said elements to provide a circuit for said absorbent; second heat exchanger means for transferring the heat generated by said furnace to said generator for heating said absorber; and third heat exchanger means for transferring excess heat from said generator to said evaporator to heat said refrigerant.
Claim 2
Dependent Claim
212 words
A combined air-heating and refrigeration system wherein the air temperature of a living space is maintained within a predetermined range, said air-heating portion of said system comprising: a furnace having a heat exchanger for heating air flowing thereby; first duct means for selectively admitting air from inside said living space for circulation past said furnace for heating said air; second duct means for selectively returning said air from said furnace to said living space; the refrigeration portion of said system comprising; a refrigerant; a condenser for condensing said refrigerant; an evaporator for evaporating said refrigerant; conduits interconnecting said elements to provide a circuit for said refrigerant; first heat exchanger means associated with said condenser for preheating the air passing through said first duct means, said refrigeration system being of the absorption type and further comprising: an absorbent; a generator for heating said absorbent when combined with said refrigerant; an absorber for combining said refrigerant and said absorbent; a pump for circulating said absorbent; conduits interconnecting said elements to provide a circuit for said absorbent; second heat exchanger means for transferring the heat generated by said furnace to said generator for heating said absorber; and third heat exchanger means for transferring excess heat from said generator to said evaporator to heat said refrigerant.
Claim 3
Dependent Claim
151 words
A combined air-heating and refrigeration system wherein the air temperature of a living space is maintained within a predetermined range, said air-heating portion of said system comprising: a furnace having a heat exchanger for heating air flowing therby; first duct means for selectively admitting air from inside said living space for circulation past said furnace for heating said air; second duct means for selectively returning said air from said furnace to said living space; the refrigeration portion of said system comprising: a refrigerant; a condenser for condensing said refrigerator; an evaporator for evaporating said refrigerant; conduits interconnecting said elements to provide a circuit for said refrigerant; first heat exchanger means associated with said condenser for preheating the air passing through said condenser for preheating the air passing through said first duct means; and second heat exchanger means for transferring excess heat from said furnace to said evaporator to heat said refrigerant.
Claim 4
Dependent Claim
151 words
A combined air-heating and refrigeration system wherein the air temperature of a living space is maintained within a predetermined range, said air-heating portion of said system comprising: a furnace having a heat exchanger for heating air flowing therby; first duct means for selectively admitting air from inside said living space for circulation past said furnace for heating said air; second duct means for selectively returning said air from said furnace to said living space; the refrigeration portion of said system comprising: a refrigerant; a condenser for condensing said refrigerator; an evaporator for evaporating said refrigerant; conduits interconnecting said elements to provide a circuit for said refrigerant; first heat exchanger means associated with said condenser for preheating the air passing through said condenser for preheating the air passing through said first duct means; and second heat exchanger means for transferring excess heat from said furnace to said evaporator to heat said refrigerant.
Claim 5
Dependent Claim
19 words
The combined air-heating and refrigeration system defined in claim 2 wherein said refrigeration system is of the compression type.
Claim 6
Dependent Claim
87 words
The combined air-heating and refrigeration system defined in claim 2 wherein said refrigeration system is of the absorption type and further comprising; an absorbent; a generator for heating said absorbent when combined with said refrigerant; an absorber for combining said refrigerant and said absorbent; a pump for circulating said absorbent; a pump for circulating said absorbent; conduits interconnecting said elements to provide a circuit for said absorbent; and third heat exchanger means for transferring the heat generated by said furnace to said generator for heating said absorbent.
Claim 7
Dependent Claim
59 words
The combined air-heating and refrigeration system defined in claim 2 further comprising: third duct means for selectively delivering warm air from said living space to said evaporator; heat exchanger means disposed within said evaporator for cooling said warm air as it passes by said evaporator; and fourth duct means for selectively returning said cool air to said living space.
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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |