APPARATUS FOR PREHEATING FRESH AIR

Abstract: An apparatus for preheating fresh air supplied to living quarters or the like space. The apparatus includes a radiator (4, 5) mounted in connection with an opening (3) in the wall (1) of the space, and a transfer means (6) extending between the opening and the radiator for leading fresh air to at least one region of air heated by the radiator.

Description: APPARATUS FOR PREHEATING FRESH AIR DESCRIPTION Technical Field The present invention relates to an apparatus for preheating fresh air supplied to living quarters or similar space. State of the Art Different systems are utilized today in the ventilation of such space. The most usual and least costly system comprises supply air valves in the form of adjustable dampers mounted in connection to holes under windows in the walls of the space. The greatest disadvantage with this system is that in cold weather cold air flows directly into the space and is felt by persons therein as draught, which can be eliminated only by closing the damper. Such a measure results in lack of ventilation with the risk of unpleasant odor, formation of mould and other environmental problems in the space. In another known ventilation system, a fan is utilized in connection with an exhaust air means and a fresh air supply means, the latter comprising valves which may be regulatable and are situated immediately under a ceiling or window. In this system as well, cold air flows (is drawn) in through the valves directly during cold weather, which results in draughts and cooling of the space if the valves are not closed. This cooling can only be prevented by costly heating of the space. In a third known system, there is a combined fresh air and exhaust air apparatus including a heat exchanger, which preheats the incoming fresh air, whereby the above-mentioned problems are substantially eliminated. The cost of this system and its installa¬ tion a e high, however. It is also known to supply fresh air via an opening in the wall of a liying quarter and via a transfer device arranged on radiator mounted to the wall. Such a device is shown in' Danish patent No. 62165. The device includes telescopic tubes in the wall and a valve housing between two radiator halves. The inten¬ tion is that fresh air shall flow downwards between -the radiator halves and then upwards between one of these halves and a third radiator half, but since the outlet of the valve housing opens in flush with the upper edges of .the radiator halves the pressure difference between the fresh air inlet and the outlet will be small with the risk that the fresh air will be sucked back and out through the telescopic 'tubes before it has been delivered to the radiator. Disclosure of Invention One object of the present invention is to eliminate at least some of the disadvantages burdening the known systems and devices and to provide an apparatus with which fresh air supplied to living quarters or the like space can be effectively, pre¬ heated without draughts, cooling and environmental problems occurring, and without complicated and expensive installation being required. This object is achieved by the apparatus in accordance with the invention having been given the distinguishing features disclosed in the characterizing portions of the claims. Description of Figures Figure 1 is a partially sectioned side elevation ' of an apparatus in accordance with the invention, and Figure 2 is a view seen from above of the apparatus according to Figure 1 , substantially along the line II - II in Figure 1. Preferred Embodiment In Figure 1 there is illustrated a wall 1 to a living space 2, which is to be ventilated with fresh air from outside. A hole 3 is made in the wall 1 at a given distance from a hot water radiator mounted on the wall. This radiator has two radiator halves 4, 5 spaced from each other and is of conventional implementation with horizontal upper and lower water collecting channels 27, 28 and 29,30, respectively and vertical channels 31, 32 connecting the horizontal channels to each other. As will be understood later the size of the hole 3 is not critical, neither is its distance from the radiator 4, 5. In accordance with the invention a transfer means 6 has been installed between the hole 3 and radiator 4, 5 for preheating the fresh air flowing from the hole 3. The space 2 is preferably also supplied with an exhaust air means including a suction fan (unillustrated) to ensure a flow of fresh air through the hole 3. The transfer means 6 comprises two separate parts, namely a casing 7 and a drum 8 comprising a tube 8a and a frame 8b. Two opposing sides of the frame 8b rest on two angle irons at mutual spacing, these being welded to the radiator halves 4, 5, one such angle iron 9 being illustrated in Figure 1. There are elongate slots 11 and 12 in the frame sides and angle irons, each slot in a frame side being in linear register with one in the respective angle iron. The casing 7 which is double-walled, partly to prevent condensation forming on its walls and partly to deaden the sound of the air flowing through the hole 3, is provided with a lower rectangular flange 13 having a circular hole 14 situated in register with a circular hole 10 in the bottom of the casing and the tube 8a, the casing also being provided with an annular flange 15 for retaining a sealing ring 16. There are two holes (not shown) in the flange 13 which are situated over the slots 11, 12. Screws 19, 20 are inserted in these holes and the slots 11, 12, and are threaded into nuts (of which one 21 is shown) on the underside of the angle iron 9. A filter 22 is exchangeably inserted in the inlet of the casing 7, for preventing foreign bodies coming into the means 6 together with the fresh air, this filter also having a certain sound-deadening effect. One side of the filter 22 engages against an exchangeable grating 23, the hole size and/or the number of holes of which has been selected so that a desired flow through the means 6 is obtained. The larger the space 2 is, and/or the smaller number of radiators 4, 5 in the room, the greater and/or more holes are selected for the grating 23. Before installing the apparatus in accordance with the invention, the hole 3 is made in the wall 1, the diameter of this hole being less than the inlet opening of the casing 7 and its distance from the floor of the space 2 somewhat- exceeding the distance * between the floor and the upper part of the radiator 4, 5 mounted on the wall. No measures for the wall other than making this hole are necessary. On installa¬ tion, the drum 8 is taken down between the radiator halves to the position illustrated in the figures, where it rests on the angle irons 9, and this should suitably be carried out before a possible window board is mounted above the radiator. The casing 7 is then placed above the drum 8 in the position illustrated in Figure 1, the screws 19, 20 and nuts 21 being fitted in the way described above. Before and during tightening the screws, the casing is pressed by hand to the left in Figure 1 so that the sealing ring 16 is compressed for sealing against the wall 1. Not only is a secure seal obtained by this measure but there also ensures that the means 6 can be mounted for functioning effectively even if the distance between the radiator 4, 5 and the wall 1 varies. Air drawn into the hole 3 into the wall 1 , usually due to a sub-pressure in the room 2, flows first through the filter 22 and grating 23 and there¬ after through the casing 7 and down into the drum 8 to be dissipated between the radiator halves 4, 5 from the end of the tube 8a opening out at least below the upper collecting channels 27, 28 and preferably at a short distance (about 10 cm) from the bottom of the radiator. The air flowing out from the tube is heated by the radiator to flow upwards between the radiator halves, whereby both end plates 24 and 25 connecting the halves and a bottom plate 26 contribute to guide the air so that it is kept between the radiator halves until it leaves the radiator at its upper end through both openings between the means 6 and the ends 24, 25. Although only one embodiment of the apparatus in accordan'ce with the present inventio.n is described above in connection with the drawings, it will be understood that the invention is not restricted to this embodiment but only by the disclosures in the claims.

Claims: CLAIMS 1. Apparatus, for preheating fresh aiir supplied to living quarters or the like space, via a radiator mounted in connection with an opening in the wall of the space, said apparatus including a transfer means extending between the opening and the radiator for leading fresh air to at least one region of air. heated by the radiator, characterized in that at least one part' (7). of the transfer means (6) is displaceably mounted on the radiator (4, 5) and includes an inlet (at 15) pressing, preferably via a seal (16), against the wall portion surrounding said opening (3) . 2. Apparatus as claimed in claim 1 , characterized in that the force with which the inlet engages against the wall portion is adjustable by a setting means (11, 12, 19, 20, 21), mounted on the transfer means (6) and preferably including at a nut- and screw connection (19 - 21) arranged in at least one elongate slot (11, 12) in the transfer means and/or the radiator. 3. Apparatus as claimed in claim 1 or 2, characterized in that the transfer means (6) includes at least two parts (7, 8) removable relative each other, a first part comprising a casing (7) mounted between the wall (1) and the upper part of the radiator (4, 5), there being a second part comprising a drum (8) connected to the casing and mounted substantially vertically to extend along the radiator. 4. Apparatus as claimed in claim 3, characterized in that the casing (7) is double-walled and includes a removable filter (22) in its inlet. 5. Apparatus as claimed in claim 3 or 4, characterized in that there is an exchangeable grating (23) mounted in the inlet of the casing (7) , the ability of this grating to pass air being in proportion to the size of the space (2) in which the radiator is mounted and/or to the number of openings (3) in the walls of the space. 6. Apparatus as claimed in anyone of the preceding claims, characterized in that the outlet (8a) of the transfer means (6) is situated in the space between two radiator halves (4, 5) of the radiator and opens at a level below the upper collecting channel (27, 28) on at least one of the radiator halves. 7. Apparatus as claimed in claims 3 and 6, characterized in that the outlet (8a) of the transfer means (6) is the lower end of the drum (8). 8. Apparatus as claimed in claim 6 or 7, characterized by a bottom plate (26) connecting the radiator halves (4, 5) and guiding the fresh air flow¬ ing downwards through the transfer means (6) back and upwards through said space between the radiator halves.

Inventors: KOENBERG KURT, PAPI ADOLFO, KOENBERG, KURT, PAPI, ADOLFO
Applicants: FELLINGSBRO VERKSTAEDER, AB FELLINGSBRO VERKSTAEDER
Application year: 1986
Main classification: F24F1
IPC codes: F24D19