US5943874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desiccant assisted air conditioning apparatus
Assignee: Ebara Corp
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Filing: 1997-09-22
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Granted: 1999-08-31
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Expires: 2017-09-22
Abstract
Abstract The desiccant assisted air conditioning apparatus can provide a stable operation and a higher energy efficiency. The apparatus comprises a process air passage for flowing process air for dehumidification through a desiccant and for delivery to a conditioning space and a regeneration air passage for flowing regeneration air for removing moisture from the desiccant. An absorption heat pump means for providing cooling heat source for the process air and heating heat source for the regeneration air is provided which comprises an evaporator, an absorber, a generator, a condenser and fluid passages therebetween for forming an absorption refrigeration cycle. The absorption heat pump means is provided with a heat exchanger in a refrigerant passage between the condenser and the evaporator for cooling a refrigerant flowing through the refrigerant passage by heat exchange with a heat transfer medium.
Inventors
- 👤 Kensaku Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0014; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F2203/00; F24F2203/10; F24F2203/1016; F24F2203/1028; F24F2203/1032; F24F2203/104; F24F2203/1056; F24F2203/1076; F24F2203/1084; F25; F25B; F25B29/00; F25B29/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A desiccant assisted air conditioning apparatus comprising: a process air passage flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage flowing regeneration air for removing moisture from said desiccant; and an absorption heat pump means providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means includes a heat exchanger disposed in a refrigerant passage between said condenser and said evaporator, and flow passage means operative to conduct a heat transfer medium between said heat exchanger for cooling a refrigerant flowing through said refrigerant passage and said air conditioning apparatus for removing moisture from said desiccant.
Claim 2
Dependent Claim
140 words
A desiccant assisted air conditioning apparatus comprising: a process air passage flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage flowing regeneration air for removing moisture from said desiccant; and an absorption heat pump means providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means includes a heat exchanger disposed in a refrigerant passage between said condenser and said evaporator, and flow passage means operative to conduct a heat transfer medium between said heat exchanger for cooling a refrigerant flowing through said refrigerant passage and said air conditioning apparatus for removing moisture from said desiccant.
Claim 3
Dependent Claim
35 words
A desiccant assisted air conditioning apparatus according to claim 1, wherein said heat transfer medium is in a heat exchange relationship with said regeneration air in said regeneration air passage for heating said regeneration air.
Claim 4
Dependent Claim
29 words
A desiccant assisted air conditioning apparatus according to claim 1, wherein said heat transfer medium comprises at least a portion of said regeneration air in said regeneration air passage.
Claim 5
Dependent Claim
34 words
A desiccant assisted air conditioning apparatus according to claim 1, wherein said heat transfer medium is introduced to said absorber and said condenser so as to be heated therein after exiting said heat exchanger.
Claim 6
Dependent Claim
136 words
A desiccant assisted air conditioning apparatus comprising: a process air passage flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage flowing regeneration air for removing moisture from said desiccant, an absorption heat pump means providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means is provided with a heat exchanger disposed in a refrigerant passage between said condenser and said evaporator for cooling a refrigerant flowing through said refrigerant passage by heat exchange with a heat transfer medium, and wherein said heat transfer medium comprises an absorbent fluid exiting said absorber.
Claim 7
Dependent Claim
136 words
A desiccant assisted air conditioning apparatus comprising: a process air passage flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage flowing regeneration air for removing moisture from said desiccant, an absorption heat pump means providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means is provided with a heat exchanger disposed in a refrigerant passage between said condenser and said evaporator for cooling a refrigerant flowing through said refrigerant passage by heat exchange with a heat transfer medium, and wherein said heat transfer medium comprises an absorbent fluid exiting said absorber.
Claim 8
Dependent Claim
47 words
A desiccant assisted air conditioning apparatus according to claim 1, wherein an absorbent fluid in said absorption heat pump means is an aqueous solution comprising at least of one selected from the group consisting of sodium hydroxide, potassium hydroxide and cesium hydroxide, and the refrigerant is water.
Claim 9
Dependent Claim
123 words
A desiccant assisted air conditioning apparatus comprising: a process air passage for flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage for flowing regeneration air for removing moisture from said desiccant; and and absorption heat pump means for providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means is provided with a heat exchanger for exchanging heat between a refrigerant flowing between said condenser and said evaporator and an absorbent liquid exiting said absorber for cooling said refrigerant.
Claim 10
Dependent Claim
123 words
A desiccant assisted air conditioning apparatus comprising: a process air passage for flowing process air for dehumidification through a desiccant and for delivery to a conditioning space; a regeneration air passage for flowing regeneration air for removing moisture from said desiccant; and and absorption heat pump means for providing a cooling source for said process air and a heating source for said regeneration air, said absorption heat pump means having an evaporator, an absorber, a generator, a condenser and fluid passages therebetween forming an absorption refrigeration cycle, wherein said absorption heat pump means is provided with a heat exchanger for exchanging heat between a refrigerant flowing between said condenser and said evaporator and an absorbent liquid exiting said absorber for cooling said refrigerant.
Claim 11
Dependent Claim
46 words
A desiccant assisted air conditioning apparatus according to claim 5, wherein an absorbent fluid in said absorption heat pump means is an aqueous solution comprising at least one selected from the group consisting of sodium hydroxide, potassium hydroxide and cesium hydroxide, and the refrigerant is water.
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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) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |