US4196771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator with heat exchanger
Assignee: Norlett AS
•
Filing: 1977-09-12
•
Granted: 1980-04-08
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Expires: 1997-09-12
Abstract
Abstract A ventilator having a rotating drumlike heat exchanging fan and a housing with separation walls and a stationary conical member arranged in the hollow of the fan. Separation walls cooperating with external and internal sides of the fan have lips arranged according to the specification.
Inventors
- 👤 Per Nitteberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; F04D29/4246; F24; F24F; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1012; F24F2203/104; F24F2203/1052; F24F2203/1068; F24F2203/1084; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/015
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
329 words
A ventilator with heat exchanger in the form of a rotating drum-like fan and a housing which is externally closed and has at least one inlet opening on the suction side and at least one outlet opening on the pressure side, and separation walls between the suction side and the pressure side, characterized in that the housing comprises a scroll and two end plates, which scroll is divided by a first separation wall, extending parallel to the end plates, between the suction side and the pressure side and at a distance from the end plates, and having a central opening with a diameter which approximates the internal diameter of the exchanger and receives a fixed, hollow and conical member which with its open end with the greater diameter extends upwards into the central hollow of the exchanger, and the other end of which with its smaller diameter is tightly connected to a second separation wall between two groups of inlets on that side of the first separation wall which does not receive the exchanger, which second separation wall extends upwards over the first separation wall, along opposite sides of the external wall of the conical member and forms a first pair of lips against the internal side of the exchanger, which lips extend to the same side of the second separation wall, and on the pressure side of the first separation wall are formed a second pair of lips which from opposite sides of the internal wall of the scroll extend tangentially against the external side of the exchanger, which second pair of lips extend against the rotational direction of the exchanger, such that one lip of the first pair and one lip of the second pair are facing each other diametrically and the second lip of the first pair and the second lip of the second pair are displaced in the rotational direction of the exchanger from the internal side of the exchanger to the external side thereof.
Claim 2
Dependent Claim
329 words
A ventilator with heat exchanger in the form of a rotating drum-like fan and a housing which is externally closed and has at least one inlet opening on the suction side and at least one outlet opening on the pressure side, and separation walls between the suction side and the pressure side, characterized in that the housing comprises a scroll and two end plates, which scroll is divided by a first separation wall, extending parallel to the end plates, between the suction side and the pressure side and at a distance from the end plates, and having a central opening with a diameter which approximates the internal diameter of the exchanger and receives a fixed, hollow and conical member which with its open end with the greater diameter extends upwards into the central hollow of the exchanger, and the other end of which with its smaller diameter is tightly connected to a second separation wall between two groups of inlets on that side of the first separation wall which does not receive the exchanger, which second separation wall extends upwards over the first separation wall, along opposite sides of the external wall of the conical member and forms a first pair of lips against the internal side of the exchanger, which lips extend to the same side of the second separation wall, and on the pressure side of the first separation wall are formed a second pair of lips which from opposite sides of the internal wall of the scroll extend tangentially against the external side of the exchanger, which second pair of lips extend against the rotational direction of the exchanger, such that one lip of the first pair and one lip of the second pair are facing each other diametrically and the second lip of the first pair and the second lip of the second pair are displaced in the rotational direction of the exchanger from the internal side of the exchanger to the external side thereof.
Claim 3
Dependent Claim
54 words
A ventilator according to claim 1, characterized in that at least one inlet on the suction side extends from the lower side of the first separation wall up over the upper end plate of the housing and has a removable cover for cleaning of a suction channel which is connected to the said inlet.
Claim 4
Dependent Claim
49 words
A ventilator according to claim 1, characterized in that the rotating heat exchanger is a drum comprising a stack of annular plates of metal which are alternately flat and corrugated, which annular plates are connected to each other and to a circular plate for rotatable bearing of the drum.
Claim 5
Dependent Claim
23 words
A ventilator according to claim 3, characterized in that the flat and corrugated annular plates and the circular plate are made of aluminium.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |