US3949566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purge arrangement for absorption refrigeration systems
Assignee: York International Corp
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Filing: 1974-08-01
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Granted: 1976-04-13
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Expires: 1994-08-01
Abstract
Abstract A purge arrangement for absorption refrigeration systems using a solution of lithium bromide as an absorbent and water as a refrigerant, and a heat transfer additive, such as octyl alcohol being added to and mixing with the lithium bromide solution. The purge arrangement includes means for automatically removing noncondensible gases or vapor from the system, said means including a vacuum pump connected to a receiver to draw noncondensible gases therefrom; automatic electrical control means for said vacuum pump; and an additive overflow conduit to prevent additive collecting in the storage receiver and to assure additive return flow into the solution conduit.
Inventors
- 👤 Neil E. Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:54
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B43/00; F25B43/04; F25B43/046; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
316 words
In an absorption refrigeration machine including a generator, a condenser, an evaporator, and an absorber interconnected to form a closed system containing an absorbent solution, a refrigerant, and an undissolved liquid fraction of an additive effective to increase the refrigeration capacity of the machine, liquid passage means connected to said absorber and providing a closed circuit for flow of absorbent solution and additive through said machine, and vapor passage means for flow of noncondensible vapor from the absorber, and a purge arrangement for exhausting noncondensible vapors from the machine, said purge arrangement comprising: means defining a chamber for separating noncondensible vapors from said solution, said chamber being adapted to separate said additive from said solution, said additive being relatively volatile and having a lower specific gravity than said absorbent solution and tending to accumulate above the solution in the chamber; first conduit means having a first section connecting said liquid passage means to said chamber for diverting a portion of the solution flowing in said liquid passage means to said chamber and a second section connecting said chamber to said absorber; means for expelling separated noncondensible vapors from said system and including a receiver disposed above said chamber for receiving and holding said separated vapors prior to removal from said machine; second conduit means connecting said chamber to said receiver for flow of separated vapors therebetween, said second conduit means being adapted to conatin liquid additive separated from said solution in said chamber; means inducing flow of noncondensible vapor through said vapor passage means to said separation chamber by flow of solution through said first conduit means and entrainment of the vapor with the flowing solution; and third conduit means connecting said second conduit means to said liquid passage means to pass liquid additive, collecting in said second conduit means, directly to said liquid passage means thereby to inhibit collection of liquid additive in said compartment.
Claim 2
Dependent Claim
316 words
In an absorption refrigeration machine including a generator, a condenser, an evaporator, and an absorber interconnected to form a closed system containing an absorbent solution, a refrigerant, and an undissolved liquid fraction of an additive effective to increase the refrigeration capacity of the machine, liquid passage means connected to said absorber and providing a closed circuit for flow of absorbent solution and additive through said machine, and vapor passage means for flow of noncondensible vapor from the absorber, and a purge arrangement for exhausting noncondensible vapors from the machine, said purge arrangement comprising: means defining a chamber for separating noncondensible vapors from said solution, said chamber being adapted to separate said additive from said solution, said additive being relatively volatile and having a lower specific gravity than said absorbent solution and tending to accumulate above the solution in the chamber; first conduit means having a first section connecting said liquid passage means to said chamber for diverting a portion of the solution flowing in said liquid passage means to said chamber and a second section connecting said chamber to said absorber; means for expelling separated noncondensible vapors from said system and including a receiver disposed above said chamber for receiving and holding said separated vapors prior to removal from said machine; second conduit means connecting said chamber to said receiver for flow of separated vapors therebetween, said second conduit means being adapted to conatin liquid additive separated from said solution in said chamber; means inducing flow of noncondensible vapor through said vapor passage means to said separation chamber by flow of solution through said first conduit means and entrainment of the vapor with the flowing solution; and third conduit means connecting said second conduit means to said liquid passage means to pass liquid additive, collecting in said second conduit means, directly to said liquid passage means thereby to inhibit collection of liquid additive in said compartment.
Claim 3
Dependent Claim
37 words
The absorption refrigeration machine according to claim 1 in which said vapor flow-inducing means includes an eductor device employing the flowing solution as the motivating force for suction of the vapor from said absorber to said chamber.
Claim 4
Dependent Claim
35 words
The absorption refrigeration machine according to claim 1 in which said third conduit means extends vertically downwardly to connect with said liquid passage means for directing additive, overflowing said chamber, into said liquid passage means.
Claim 5
Dependent Claim
50 words
The absorption refrigeration machine according to claim 3 in which said liquid passage means includes a solution pump, and said third conduit means is connected to said liquid passage means upstream of said pump, and said first conduit means is connected to said liquid passage means downstream of the pump.
Claim 6
Dependent Claim
62 words
The absorption refrigeration machine according to claim 1 in which said first conduit means has a portion extending between said chamber and said absorber with its open terminal end being connected to said absorber above the level of its open terminal end connected to said chamber to increase the vapor pressure in the compartment appreciably above the vapor pressure in said absorber.
Claim 7
Dependent Claim
166 words
The absorption refrigeration machine defined in claim 1 in which said chamber is positioned relative to said absorber and said first, second and third conduit means to provide a liquid level above the liquid level of said absorber; and a first portion of said first conduit means extends upwardly of said liquid passage means and above the liquid level in said absorber and said chamber and then downwardly to said flow-inducing means and thereafter upwardly to and terminating in said chamber for passage of liquid solution and additive into the bottom of said chamber, and a second portion of said first conduit means is connected to the bottom of said chamber and extends upwardly above the level of the liquid in said chamber and said absorber and terminates in said absorber; said first and second portions of said first conduit means being operative to trap solution upon shutdown of the machine to seal against the return flow of noncondensible vapors from said chamber into said absorber.
Claim 8
Dependent Claim
101 words
The absorption refrigeration machine defined in claim 6 in which said third conduit means has an upper terminal end connected to said second conduit means and disposed above the level of the liquid in said absorber and said chamber, said third conduit means extending downwardly from its connection to said second conduit means below the level of the liquid in the chamber and absorber and having a lower terminal end connected to said liquid passage means, to trap solution, upon shutdown of the machine, to seal against the return flow of noncondensible vapors from said chamber and compartment into said absorber.
Claim 9
Dependent Claim
47 words
The absorption refrigeration machine according to claim 1 in which a purge pump is connected to said compartment for removal of noncondensible vapors from said machine, and check valve means prevents flow of ambient air through said pump and into said compartment when said pump is inoperative.
Claim 10
Dependent Claim
37 words
The absorption refrigeration machine according to claim 8 including means controlling operation of said purge pump and including sensing means responsive to the level of the solution in said compartment to initiate operation of said purge pump.
Claim 11
Dependent Claim
52 words
The absorption refrigeration machine according to claim 9 in which said sensing means includes a float in said compartment and a switch operable thereby, a solenoid for operating said check valve means, and a motor for operating said purge pump, and electric circuit means connecting said switch, said solenoid, and said motor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |