US4244148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for air-conditioning greenhouses
Assignee: ARMINES
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Filing: 1979-03-30
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Granted: 1981-01-13
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Expires: 1999-03-30
Abstract
Abstract The invention relates to a process for air-conditioning a greenhouse or the like for the cultivation of plants, due to the solar energy which is picked up during the day, wherein isothermic containers are disposed inside the greenhouse, which contain a body of which the melting temperature is between 10° and 20° C., so that, during the day, when the temperature inside the greenhouse exceeds said melting temperature, said body melts, absorbing calories and cooling the atmosphere of the greenhouse and, during the night, when the temperature becomes lower than said melting temperature, said body solidifies, releasing the latent heat of solidification.
Inventors
- 👤 Francoise M. Chabanon
- 👤 Henri J. Royer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:40
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/02; A; A01; A01G; A01G9/00; A01G9/24; A01G9/243; F28D20/028; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y02E; Y02E60/00; Y02E60/14; Y02E70/00; Y02E70/30; Y02P; Y02P60/00; Y02P60/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A process for air-conditioning a greenhouse or the like for the cultivation of plants by means of heat from the sun which consists of placing within the greenhouse a plurality of portable isothermic closed containers, each container having a unit volume of 1-10 liters, each container containing a body of a material having latent heat of fusion, the melting temperature of said body of material being between 10° and 20° C., uniformly distributing said containers in the interior of the greenhouse at a rate of 5-10 containers per m 2 of ground surface, whereby during the day when the temperature inside the greenhouse due to the heat from the sun exceeds said melting temperature, said body of material melts, absorbing calories and cooling the interior of said greenhouse and during the night when the temperature in the greenhouse becomes lower than said melting temperature, said body of material solidifies and releases by solidification the latent heat of fusion.
Claim 2
Dependent Claim
158 words
A process for air-conditioning a greenhouse or the like for the cultivation of plants by means of heat from the sun which consists of placing within the greenhouse a plurality of portable isothermic closed containers, each container having a unit volume of 1-10 liters, each container containing a body of a material having latent heat of fusion, the melting temperature of said body of material being between 10° and 20° C., uniformly distributing said containers in the interior of the greenhouse at a rate of 5-10 containers per m 2 of ground surface, whereby during the day when the temperature inside the greenhouse due to the heat from the sun exceeds said melting temperature, said body of material melts, absorbing calories and cooling the interior of said greenhouse and during the night when the temperature in the greenhouse becomes lower than said melting temperature, said body of material solidifies and releases by solidification the latent heat of fusion.
Claim 3
Dependent Claim
28 words
The process of claim 1, wherein said material is a sodium hydrate and each container further contains a small fragment of an agent for nucleating the sodium hydrate.
Claim 4
Dependent Claim
41 words
The process of claim 2 wherein said body of material having latent heat of fusion is hydrated sodium hydroxide NaOH, 3.5H 2 O of melting temperature 15° C. and said nucleating agent is Na 2 CrO 4 , 4H 2 O.
Claim 5
Dependent Claim
16 words
The process of claims 2 or 3 wherein said nucleating agent is placed behind a screen.
References Cited (Backward Citations)
DE508922C
Cited
FR1568245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |