US3695053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dilution system for absorption refrigeration systems
Assignee: Carrier Corp
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Filing: 1971-07-28
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Granted: 1972-10-03
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Expires: 1991-07-28
Abstract
Abstract A two-stage air cooled lithium bromide absorption refrigeration system having a generator a refrigerant condenser, a high pressure absorber coupled with a high temperature evaporator, a low pressure absorber coupled with a low temperature evaporator and an air conditioning fan coil unit for passing cooled refrigerant in heat exchange with air to be cooled is provided with a dilution system for automatically diluting the absorbent solution under conditions of either low ambient temperatures or an inadequately purged low pressure absrober. The dilution system includes a refrigerant sump connected by a dilution passage to a location containing absorbent solution. When the low pressure absorber is poorly purged, the difference in temperature between the intermediate solution and the abmibent air will be reduced. When this difference in temperature is less than a predetermined difference, a value in the dilution passage is opened to pass refrigernat from the sump to the location containing absorbent solution to dilute the solution.
Inventors
- 👤 Charles K Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B15/008; F25B2315/00; F25B2315/001; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
236 words
An absorption refrigeration system comprising: A. a generator for concentrating absorbent solution by heating the solution and vaporizing refrigerant therefrom; B. a refrigerant condenser for condensing refrigerant vapor formed in the generator; C. an evaporator for evaporating refrigerant to produce a refrigeration effect; D. an absorber for absorbing refrigerant vapor evaporated in the evaporator into absorbent solution discharged from the generator; and E. means for passing a cooling medium in heat exchange relation with absorbent solution in said absorber; wherein the improvement comprises: H. dilution means including: 1. dilution passage means extending between a location in said system containing refrigerant and a location is said system containing absorbent solution; 2. dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution; 3. dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature which is a function of the temperature of absorbent solution passing from said absorber, and a second temperature sensing means for sensing a temperature which is a function of the temperature of the cooling medium passing to the absorber; and 4. control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to thereby dilute the absorbent solution in said system.
Claim 2
Dependent Claim
236 words
An absorption refrigeration system comprising: A. a generator for concentrating absorbent solution by heating the solution and vaporizing refrigerant therefrom; B. a refrigerant condenser for condensing refrigerant vapor formed in the generator; C. an evaporator for evaporating refrigerant to produce a refrigeration effect; D. an absorber for absorbing refrigerant vapor evaporated in the evaporator into absorbent solution discharged from the generator; and E. means for passing a cooling medium in heat exchange relation with absorbent solution in said absorber; wherein the improvement comprises: H. dilution means including: 1. dilution passage means extending between a location in said system containing refrigerant and a location is said system containing absorbent solution; 2. dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution; 3. dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature which is a function of the temperature of absorbent solution passing from said absorber, and a second temperature sensing means for sensing a temperature which is a function of the temperature of the cooling medium passing to the absorber; and 4. control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to thereby dilute the absorbent solution in said system.
Claim 3
Dependent Claim
29 words
dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution;
Claim 4
Dependent Claim
29 words
dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution;
Claim 5
Dependent Claim
143 words
An absorption refrigeration system comprising: A. a generator for concentrating absorbent solution by heating the solution and vaporizing refrigerant therefrom; B. a refrigerant condenser for condensing refrigerant vapor formed in the generator; C. a low temperature evaporator for evaporating refrigerant at a relatively low temperature to produce a refrigeration effect; D. a low pressure absorber for absorbing refrigerant vapor evaporated in the low temperature evaporator into strong absorbent solution discharged from the generator; E. a high temperature evaporator for evaporating refrigerant at a relatively higher temperature to produce a refrigeration effect; F. a high pressure absorber for absorbing refrigerant vapor evaporated in the high temperature evaporator into intermediate strength absorbent solution discharged from the low pressure absorber; and G. means for passing a cooling medium in heat exchange relation with absorbent solution in said absorbers: wherein the improvement comprises: H. dilution means including:
Claim 6
Dependent Claim
143 words
An absorption refrigeration system comprising: A. a generator for concentrating absorbent solution by heating the solution and vaporizing refrigerant therefrom; B. a refrigerant condenser for condensing refrigerant vapor formed in the generator; C. a low temperature evaporator for evaporating refrigerant at a relatively low temperature to produce a refrigeration effect; D. a low pressure absorber for absorbing refrigerant vapor evaporated in the low temperature evaporator into strong absorbent solution discharged from the generator; E. a high temperature evaporator for evaporating refrigerant at a relatively higher temperature to produce a refrigeration effect; F. a high pressure absorber for absorbing refrigerant vapor evaporated in the high temperature evaporator into intermediate strength absorbent solution discharged from the low pressure absorber; and G. means for passing a cooling medium in heat exchange relation with absorbent solution in said absorbers: wherein the improvement comprises: H. dilution means including:
Claim 7
Dependent Claim
29 words
dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution;
Claim 8
Dependent Claim
29 words
dilution valve means in said dilution passage for controlling the passage of refrigerant from said location containing refrigerant through said dilution passage means to said location containing absorbent solution;
Claim 9
Dependent Claim
61 words
dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature functionally related to the temperature of intermediate strength absorbent solution passing from said low pressure absorber to said high pressure absorber, and a second temperature sensing means for sensing a temperature functionally related to the temperature of the cooling medium passing to the absorber; and
Claim 10
Dependent Claim
61 words
dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature functionally related to the temperature of intermediate strength absorbent solution passing from said low pressure absorber to said high pressure absorber, and a second temperature sensing means for sensing a temperature functionally related to the temperature of the cooling medium passing to the absorber; and
Claim 11
Dependent Claim
56 words
dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature which is a function of the temperature of absorbent solution passing from said absorber, and a second temperature sensing means for sensing a temperature which is a function of the temperature of the cooling medium passing to the absorber; and
Claim 12
Dependent Claim
56 words
dilution thermostat means, said thermostat means including a first temperature sensing means for sensing a temperature which is a function of the temperature of absorbent solution passing from said absorber, and a second temperature sensing means for sensing a temperature which is a function of the temperature of the cooling medium passing to the absorber; and
Claim 13
Independent Claim
171 words
A method of producing refrigeration and operating an absorption refrigeration system having a generator, a condenser, an evaporator, and an absorber, which comprises: A. heating weak absorbent solution in the generator to concentrate it by vaporizing refrigerant therefrom; B. condensing in the condenser refrigerant vapor formed in the generator; C. evaporating liquid refrigerant in the evaporator to produce refrigeration; D. aBsorbing refrigerant vapor formed in the evaporator into absorbent solution in the absorber; E. passing a cooling medium in heat exchange relation with absorbent solution in the absorber; wherein the improvement comprises: F. sensing a first temperature which is a function of the temperature of solution discharged from the absorber; G. sensing a second temperature which is a function of the temperature of the cooling medium passing to the absorber; and H. diluting absorbent solution by passing liquid refrigerant from a location in said system containing refrigerant to a location in said system containing absorbent solution upon sensing a difference between said first and second sensed temperatures below a predetermined difference.
Claim 14
Independent Claim
171 words
A method of producing refrigeration and operating an absorption refrigeration system having a generator, a condenser, an evaporator, and an absorber, which comprises: A. heating weak absorbent solution in the generator to concentrate it by vaporizing refrigerant therefrom; B. condensing in the condenser refrigerant vapor formed in the generator; C. evaporating liquid refrigerant in the evaporator to produce refrigeration; D. aBsorbing refrigerant vapor formed in the evaporator into absorbent solution in the absorber; E. passing a cooling medium in heat exchange relation with absorbent solution in the absorber; wherein the improvement comprises: F. sensing a first temperature which is a function of the temperature of solution discharged from the absorber; G. sensing a second temperature which is a function of the temperature of the cooling medium passing to the absorber; and H. diluting absorbent solution by passing liquid refrigerant from a location in said system containing refrigerant to a location in said system containing absorbent solution upon sensing a difference between said first and second sensed temperatures below a predetermined difference.
Claim 15
Independent Claim
221 words
A method of producing refrigeration and operating an absorption refrigeration system having a generator, a condenser, a low temperature evaporator, a low pressure absorber, a high temperature evaporator, and a high pressure absorber, which comprises: A. heating weak absorbent solution in the generator to concentrate it by vaporizing refrigerant therefrom; B. condensing in the condenser refrigerant vapor formed in the generator; C. evaporating liquid refrigerant in the high temperature evaporator and in the low temperature evaporator to produce refrigeration; D. absorbing refrigerant vapor formed in the high temperature evaporator into absorbent solution in the high pressure absorber, and absorbing refrigerant vapor formed in the low temperature evaporator into absorbent solution in the low pressure absorber; E. passing a cooling medium in heat exchange relation with absorbent solution in the absorbers; wherein the improvement comprises; F. sensing a first temperature which is a function of the temperature of intermediate solution passing from the low pressure absorber to the high pressure absorber; G. sensing a second temperature which is a function of the temperature of the cooling medium passing to the absorber; and H. diluting absorbent solution by passing liquid refrigerant from a location in said system containing refrigerant to a location in said system containing absorbent solution upon sensing a difference between said first and second sensed temperatures below a predetermined difference.
Claim 16
Independent Claim
221 words
A method of producing refrigeration and operating an absorption refrigeration system having a generator, a condenser, a low temperature evaporator, a low pressure absorber, a high temperature evaporator, and a high pressure absorber, which comprises: A. heating weak absorbent solution in the generator to concentrate it by vaporizing refrigerant therefrom; B. condensing in the condenser refrigerant vapor formed in the generator; C. evaporating liquid refrigerant in the high temperature evaporator and in the low temperature evaporator to produce refrigeration; D. absorbing refrigerant vapor formed in the high temperature evaporator into absorbent solution in the high pressure absorber, and absorbing refrigerant vapor formed in the low temperature evaporator into absorbent solution in the low pressure absorber; E. passing a cooling medium in heat exchange relation with absorbent solution in the absorbers; wherein the improvement comprises; F. sensing a first temperature which is a function of the temperature of intermediate solution passing from the low pressure absorber to the high pressure absorber; G. sensing a second temperature which is a function of the temperature of the cooling medium passing to the absorber; and H. diluting absorbent solution by passing liquid refrigerant from a location in said system containing refrigerant to a location in said system containing absorbent solution upon sensing a difference between said first and second sensed temperatures below a predetermined difference.
Claim 17
Dependent Claim
39 words
control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to thereby dilute the absorbent solution in said system.
Claim 18
Dependent Claim
39 words
control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to thereby dilute the absorbent solution in said system.
Claim 19
Dependent Claim
66 words
control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to dilute the absorbent solution in said system, and for closing the dilution valve in response to an increase in the difference between the two temperatures sensed by said thermostat means above a predetermined temperature difference.
Claim 20
Dependent Claim
66 words
control means for opening said dilution valve in response to a decrease in the difference between the two temperatures sensed by said dilution thermostat means below a predetermined temperature difference to dilute the absorbent solution in said system, and for closing the dilution valve in response to an increase in the difference between the two temperatures sensed by said thermostat means above a predetermined temperature difference.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |