Patent US4449574A successfully refreshed from Google Patents.
US4449574A
Expired / Lapsed
US
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Ventilation device
Assignee: Mitsubishi Electric Corp
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Filing: 1982-07-02
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Granted: 1984-05-22
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Expires: 2002-07-02
Abstract
Abstract A ventilation device including a heat exchanger having thermosensitive elements each placed, respectively at the inlet of an air-feeding passage, the inlet of an air-discharging passage and the outlet of the air-feeding passage and a display unit for showing temperature detected by the respective thermosensitive elements.
Inventors
- 👤 Masataka Yoshino
- 👤 Yoshiki Hashimoto
- 👤 Yasunori Ushikosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:15
CPC Classifications
F; F24; F24F; F24F12/00; F24F12/001; F24F2012/007; Y; Y02; Y02B; Y02B30/00; Y02B30/56; Y10; Y10S; Y10S165/00; Y10S165/001; Y10S165/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A ventilation device including a heat-exchanging means, said heat-exchanging means including an air-feeding passage having an inlet and an outlet and an air-discharging passage having an inlet and an outlet, comprising: a first thermosensitive element placed at said inlet of said air-feeding passage to detect an outdoor air temperature; a second thermosensitive element placed at said outlet of said air-feeding passage such that a fed air temperature is detected after the outdoor air has been thermally conditioned by said heat-exchanging means as the outdoor air circulates through said air-feeding passage of said heat-exchanging means; a third thermosensitive element placed at said inlet of said air-discharging passage such that a room air temperature is detected prior to the room air being thermally conditioned by said heat-exchanging means as the room air circulates through said air-discharging passage of said heat-exchanging means to exit via said outlet of said air-discharging passage; and a display unit for showing said outdoor air temperature, said fed-air temperature and said room air temperature detected by said first thermosensitive element, said second thermosensitive element and said third thermosensitive element, respectively.
Claim 2
Dependent Claim
182 words
A ventilation device including a heat-exchanging means, said heat-exchanging means including an air-feeding passage having an inlet and an outlet and an air-discharging passage having an inlet and an outlet, comprising: a first thermosensitive element placed at said inlet of said air-feeding passage to detect an outdoor air temperature; a second thermosensitive element placed at said outlet of said air-feeding passage such that a fed air temperature is detected after the outdoor air has been thermally conditioned by said heat-exchanging means as the outdoor air circulates through said air-feeding passage of said heat-exchanging means; a third thermosensitive element placed at said inlet of said air-discharging passage such that a room air temperature is detected prior to the room air being thermally conditioned by said heat-exchanging means as the room air circulates through said air-discharging passage of said heat-exchanging means to exit via said outlet of said air-discharging passage; and a display unit for showing said outdoor air temperature, said fed-air temperature and said room air temperature detected by said first thermosensitive element, said second thermosensitive element and said third thermosensitive element, respectively.
Claim 3
Dependent Claim
35 words
A ventilation device according to claim 1 wherein said display unit is supported by a main casing of said heat exchanger so as to be slanted in connection with the outer surface of said casing.
Claim 4
Dependent Claim
48 words
A ventilation device according to claim 1 wherein said first, second and third thermosensitive elements are placed so as to be slidable and retained at a desired position near said inlet of said air-feeding passage, said inlet of said air-discharging passage and said outlet of said air-feeding passage.
Claim 5
Dependent Claim
46 words
A ventilation device according to claim 1 wherein said first, second and third thermosensitive elements are fixedly mounted on a frame of said heat exchanging means near said inlet of said air-feeding passage, said inlet of said air-discharging passage and said outlet of said air-feeding passage.
References Cited (Backward Citations)
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Cited
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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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |