US4622830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration system with separate high- and low-pressure sections and method of operating such a system
Assignee: Borsig GmbH
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Filing: 1985-07-15
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Granted: 1986-11-18
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Expires: 2005-07-15
Abstract
Abstract A method of operating an absorption refrigeration system. The system has high- and low-pressure sections. The sections are connected by three lines and have an evaporator for subcooling the liquified refrigerant before it enters a connecting line. To enable uninterrupted transport of the weak refrigerant solution without increasing prime cost, the refrigerant vapor is fed from a subcooler into the expanded weak refrigerant solution at one or more points and a connecting line that conveys the weak refrigerant acts as an absorber. Expanded and evaporating refrigerant fluid flows through a subcooler in the high-pressure section. A condenser is in a line that conveys the weak refrigerant solution. The exit from the subcooler communicates through another line downstream of an expansion valve with a line that conveys the weak refrigerant solution and acts accordingly as an uncooled absorber.
Inventors
- 👤 Gunther Holldorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
174 words
An absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution; a connecting line leaving from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution; a further expansion valve in a line in said low-pressure section and conveying weak refrigerant solution.
Claim 2
Dependent Claim
174 words
An absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution; a connecting line leaving from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution; a further expansion valve in a line in said low-pressure section and conveying weak refrigerant solution.
Claim 3
Dependent Claim
18 words
Absorption refrigeration system as defined in claim 1, wherein said further expansion valve has a fixed throttle position.
Claim 4
Dependent Claim
16 words
Absorption refrigeration system as defined in claim 1, wherein said further expansion valve is automatically controlled.
Claim 5
Dependent Claim
191 words
Absorption refrigeration system for using waste heat in a predetermined efficient manner to heat the absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section at separate locations; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connecting to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution, said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution; a connecting line leading from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution.
Claim 6
Dependent Claim
191 words
Absorption refrigeration system for using waste heat in a predetermined efficient manner to heat the absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section at separate locations; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connecting to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution, said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution; a connecting line leading from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution.
Claim 7
Dependent Claim
196 words
Absorption refrigeration system for using waste heat in a predetermined efficient manner to heat the absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section at separate locations said high-pressure section having a desorber, a rectifying column a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporated located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution, said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution at at least one point; a connecting line leading from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution.
Claim 8
Dependent Claim
196 words
Absorption refrigeration system for using waste heat in a predetermined efficient manner to heat the absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section at separate locations said high-pressure section having a desorber, a rectifying column a solution heat exchanger, a condenser, and a subcooler-evaporator; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporated located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution, said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution at at least one point; a connecting line leading from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution.
Claim 9
Dependent Claim
195 words
An absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporate; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution; said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution at at least one point; a connecting line leaving from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution; a further expansion valve in a line in said low-pressure section and conveying weak refrigerant solution.
Claim 10
Dependent Claim
195 words
An absorption refrigeration system, comprising: a separate high-pressure section and a separate low-pressure section; said high-pressure section having a desorber, a rectifying column, a solution heat exchanger, a condenser, and a subcooler-evaporate; said low-pressure section being connected to said high-pressure section by three lines; said low-pressure section having an evaporator, an absorber, and a solution pump; a connecting line for conducting liquified refrigerant; said subcooler-evaporator located in said high-pressure section being connected between said condenser and said connecting line for conducting liquified refrigerant; said subcooler-evaporator subcooling said liquified refrigerant before entering said connecting line for conducting liquified refrigerant; an expansion valve in an outlet line of said solution heat exchanger; vapor exit means from said subcooler-evaporator communicating with an outlet line of said expansion valve at a junction, said outlet line of said expansion valve conveying weak refrigerant solution; said subcooler-evaporator feeding refrigerant vapor from said vapor exit means into an expanded weak refrigerant solution at at least one point; a connecting line leaving from said junction and functioning as an uncooled absorber in conveying said weak refrigerant solution; a further expansion valve in a line in said low-pressure section and conveying weak refrigerant solution.
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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |