US3581520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration system
Assignee: Columbia Gas System Service Corp
•
Filing: 1969-04-09
•
Granted: 1971-06-01
•
Expires: 1989-04-09
Abstract
Abstract An absorption refrigeration system having a gas-fired, infrared radiant heater, a compact single-unit combined generator, analyzer and rectifier. The unit is formed by concentric cylindrical shells closed at the top and bottom to form an annular space therebetween with the inner wall defining the annular space surrounding the radiant burner. The lower section of the annular space constitutes the generator; the intermediate section contains the analyzer and an associated heat exchanger; and the upper section contains the rectifier. The interior wall of the generator section is uniformly heated by the radiant burner, and the products of combustion also heat the exterior wall of the generator.
Inventors
- 👤 August Quesada
- 👤 Norman D Malcosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B33/00; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
An absorption refrigeration system comprising a generator, a condenser, an evaporator, an absorber, conduits interconnecting said elements to provide circuits for refrigerant and absorbent, a pump for circulating absorbent, restricting means in the conduits to maintain a difference in pressure between the generator and condenser at a higher pressure and the evaporator and absorber at a lower pressure, said generator comprising a vessel having inner and outer shells forming an annular space therebetween, a radiant heater having a wall adjacent the inner shell of the annulAr generator vessel, a gas burner for heating the wall of the radiant heater, and a casing surrounding the exterior of the outer wall of the generator for directing products of combustion from the space at the interior around the outside of the generator; an inlet pipe extending to the bottom of said annular space for supplying absorption solution strong in refrigerant to the generator, a solution-collecting trough in said annular space between the inner and outer shells, said trough being of less width than the spacing between the walls and having a vertical flange, a well depending from the trough, accumulated solution from which refrigerant has been expelled overflowing the vertical flange into the trough and well depending therefrom, and an outlet pipe extending into the depending wall.
Claim 2
Dependent Claim
214 words
An absorption refrigeration system comprising a generator, a condenser, an evaporator, an absorber, conduits interconnecting said elements to provide circuits for refrigerant and absorbent, a pump for circulating absorbent, restricting means in the conduits to maintain a difference in pressure between the generator and condenser at a higher pressure and the evaporator and absorber at a lower pressure, said generator comprising a vessel having inner and outer shells forming an annular space therebetween, a radiant heater having a wall adjacent the inner shell of the annulAr generator vessel, a gas burner for heating the wall of the radiant heater, and a casing surrounding the exterior of the outer wall of the generator for directing products of combustion from the space at the interior around the outside of the generator; an inlet pipe extending to the bottom of said annular space for supplying absorption solution strong in refrigerant to the generator, a solution-collecting trough in said annular space between the inner and outer shells, said trough being of less width than the spacing between the walls and having a vertical flange, a well depending from the trough, accumulated solution from which refrigerant has been expelled overflowing the vertical flange into the trough and well depending therefrom, and an outlet pipe extending into the depending wall.
Claim 3
Dependent Claim
121 words
An absorption refrigeration system in accordance with claim 1 having a reservoir trough in the annular space between the shells and above the solution collection trough, said reservoir trough being of less length than the periphery of the annular space and having closed ends, a heat exchanger in said reservoir trough and connected at one end to the outlet pipe in the collection trough, means for delivering solution strong in refrigerant to one end of the reservoir trough for flow therethrough to the opposite end, a wall in said reservoir trough forming a discharge chamber into which solution flows, and said inlet pipe extending from the bottom of the discharge chamber to a position adjacent the bottom of the annular space.
Claim 4
Dependent Claim
116 words
An absorption refrigeration system in accordance with claim 2 having a septum for closing the space between the inner and outer shells above the reservoir trough, said septum being of less length than the periphery of the annular space, spaced end plates between the inner and outer shells of the vessel at the ends of the septum, alternate trays arranged in spaced overlying relation between the inner and outer walls of the vessel and the spaced end plates, and means to supply a solution strong in refrigerant onto the septum plate for flow onto the upper tray and over the successive lower trays and countercurrent to the flow of expelled refrigerant vapor to provide an analyzer.
Claim 5
Dependent Claim
75 words
An absorption refrigeration system in accordance with claim 3 in which a rectifier is provided in the annular space above the septum, said rectifier comprising separate pipes in heat exchange relation, one end of one pipe being connected to the outlet end of the heat exchanger in the reservoir trough, one end of the other pipe being in open communication with the top of the analyzer and from which absorbent strong in refrigerant may flow.
Claim 6
Dependent Claim
161 words
An absorption refrigeration system comprising a generator, a condenser, an evaporator and absorber, conduits interconnecting the elements to provide circuits for the flow of refrigerant and absorbent, a pump for circulating absorbent in a circuit between the generator and absorber, restricting means in the conduits to maintain a difference in pressure between the generator and condenser operable at a higher pressure and the evaporator and absorber operable at a lower pressure, a unit having inner and outer shells closed at the top and bottom to form an annular vessel, means for heating the lower section of said annular vessel constituting a generator to expel refrigerant vapor from absorbent therein, an analyzer in an intermediate section of the annular vessel, a rectifier in the upper section of said annular vessel, and insulation in an intermediate space between the inner and outer shells of the annular vessel and the sides of the analyzer and between the heater section of the vessel and rectifier.
Claim 7
Dependent Claim
161 words
An absorption refrigeration system comprising a generator, a condenser, an evaporator and absorber, conduits interconnecting the elements to provide circuits for the flow of refrigerant and absorbent, a pump for circulating absorbent in a circuit between the generator and absorber, restricting means in the conduits to maintain a difference in pressure between the generator and condenser operable at a higher pressure and the evaporator and absorber operable at a lower pressure, a unit having inner and outer shells closed at the top and bottom to form an annular vessel, means for heating the lower section of said annular vessel constituting a generator to expel refrigerant vapor from absorbent therein, an analyzer in an intermediate section of the annular vessel, a rectifier in the upper section of said annular vessel, and insulation in an intermediate space between the inner and outer shells of the annular vessel and the sides of the analyzer and between the heater section of the vessel and rectifier.
Claim 8
Dependent Claim
79 words
An absorption refrigeration system in accordance with claim 5 in which an annular collection trough is provided in the annular space adjacent the top of the heated section, said collection trough being of less width than the space between the inner and outer shells and having a flange over which solution flows, a well dependent froM the collection trough, and an outlet pipe for solution weak in refrigerant extending into the well to a position adjacent the bottom thereof.
Claim 9
Dependent Claim
123 words
An absorption refrigeration system in accordance with claim 5 in which an annular reservoir trough is mounted in the annular space above the heated section, said reservoir trough being of less length than the periphery of the annular space and closed at its opposite ends, means for supplying absorbent strong in refrigerant to one end of the reservoir trough to flow toward the opposite end thereof, a wall in the reservoir tray forming a chamber at one end, a pipe depending from the chamber to a position adjacent the bottom of the annular vessel to supply solution strong in refrigerant thereto, and a heat exchanger in the reservoir trough connected to receive solution weak in refrigerant from the heated section of the vessel.
Claim 10
Dependent Claim
133 words
An absorption refrigeration system in accordance with claim 5 in which the analyzer comprises a septum plate between the inner and outer walls of the annular space above the heated section, said septum plate being of less length than the periphery of the annular space, transverse end plates extending between the inner and outer shell at opposite ends of the septum plate, respectively, and alternate trays arranged in overlapping relation in the space between the inner and outer shells and end plates, and means for supplying solution strong in refrigerant to the septum plate adjacent one of the end plates for flow into the tray at the top of the opposite end plate whereby the expelled refrigerant vapor and solution strong in refrigerant flow in countercurrent directions in intimate contact with each other.
Claim 11
Dependent Claim
88 words
An absorption refrigeration system in accordance with claim 5 in which the rectifier comprises a heat exchanger having concentric pipes, the inner pipe being connected to the lower section of the unit constituting a generator, and the outer pipe of the rectifier having an open end above the analyzer through which absorbent strong in refrigerant flows from the pump towards the generator, and the concentric pipes having a section extending in a generally horizontal direction in the annular vessel to permit refrigerant vapor to flow towards the condenser.
References Cited (Backward Citations)
US1873390A
Cited
US2241621A
Cited
US2315364A
Cited
US2290532A
Cited
US2337870A
Cited
US3187798A
Cited
US3279213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |