Heat exchange – Thermosyphonic flue type – Heating or cooling means within distinct flue forming enclosure
Patent
1986-12-12
1989-01-10
Lazarus, Ira S.
Heat exchange
Thermosyphonic flue type
Heating or cooling means within distinct flue forming enclosure
165131, F24H 902
Patent
active
047966920
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a convector comprising at least one finned tube for conducting a heating first medium and bording elements confining an upright channel for a second medium around the finned tube.
BACKGROUND ART
Convectors containing finned tubes are mostly used for heating apartments and buildings. They are designed by taking into consideration the so-called chimney effect. The chimney effect is achieved by meass of an upright channel in which the heating tube provided with fins most of its length. The heating tube raises the temperature of the air in the channel above the temperature of the outer air, and the difference of specific densities of the cold and hot air produces an upright air flow in the channel. The quantity of heat transferred to the air flowing along the finned heating tube depends on the flow velocity, therefore the chimney effect considerably increases the heat released by the heating tube.
The aforesaid chminey effect is usually provided for by means of air-tight walls confining an upright chanel and of a heating tube or several heating tubes arranged at the bottom part of the channel. For aesthetic and hygienic reasons, the upper opening of the channel is closed by means of a grid or a similar element. Such a convector is described in the German published specification No. OS-2 649 770. The drawback of this construction consists in that the bording plates constituting the upright channel do not participate practically in the heat transfer and the grid closing the top of the channel reduces the heating power.
In another known convector flat plates provided with perforations and connected to heating tubes form practically a box. The box is roughly brick-shaped and all of its bording surfaces are provided practically equally with air-permeable perforations. In this solution no air-tightly closed bording surfaces are to be found, consequently the chimney effect is poor. Only a minimum air flow gets through the perforations of the plates so that the surplus effect related to the surplus surface is very low as compared to the above described construction of convector. These heating bodies may be considered rather free-flow radiators than convectors.
DISCLOSURE OF THE INVENTION
The object of the present invention is to achieve a finned-tube convector performing good heat engineering properties the mechanical construction of which is simple therefore it can be easily and inexpensively produced.
The invention is based upon the recognition that the upper closing grid and the bording side walls of the upright channel can be replaced at least partly by finned heating tubes the mechanical construction and aesthetic appearance of which are suitable for constituting the outer bording elements of the convector. According to the invention the finned tubes are rigidly connected to each other so that they constitute a self-supporting structure which can be simply suspended by hooks on a wall or provided with legs, to which structure a front plate and eventually a back plate can be easily fastened.
The invention is a convector comprising at least one finned tube for conducting a heating first medium and bording elements confining an upright channel for a second medium around said at least one finned tube. According to the invention the convector comprises a substantially horizontal lower finned tube, one end of which being provided with a first opening for the first medium, a substantially vertical side finned tube connected to the other end of said lower finned tube, said side finned tube constituting a first side bording element for the upright channel, a substantially horizontal upper finned tube, one end of which being connected to the upper end of said finned tube, the other end of said upper finned tube being provided with a second opening for the first medium, said lower, side and upper finned tubes constituting a path for the first medium between said first and second openings, a second side bording element between said one end of the lower finned tube and said othe
REFERENCES:
patent: 1705491 (1929-03-01), Murray, Jr.
patent: 1805116 (1931-05-01), Trane
patent: 1810973 (1931-06-01), Luromski
patent: 1963506 (1934-06-01), Schutz
patent: 3137343 (1964-06-01), Varlowga
Szabo Jozsef
Szucs Laszlo
Cole Richard R.
Energiagasdalkodasi Intezet
Lazarus Ira S.
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