Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Patent
1998-03-30
2000-05-23
Lazarus, Ira S.
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
165 53, 62285, F24H 306
Patent
active
060655313
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates generally to an air-water heat exchanger and, more particularly, to an air-water heat exchanger with an exchanger unit and a blower which are lodged in a housing attached to switch cabinet.
BACKGROUND OF THE INVENTION
An air-water-heat exchanger of this type is known from DE 40 08 838 C1. The exchanger unit in this known air-water heat exchanger is located in the inlet chamber and the blower is located in the outlet chamber.
OBJECTS OF THE INVENTION
It is an object of this invention to provide an improved air-water heat exchanger that overcomes some of the problems and shortcomings of devices of the prior art.
Another object of this invention is to provide an improved air-water heat exchanger that results in a more efficient transfer of air over the heat exchanger.
How these and other objects are accomplished will become apparent from the following descriptions and from the drawings.
SUMMARY OF THE INVENTION
The invention involves an improvement to an air-water heat exchanger having an exchanger unit and a blower that are located in a housing constructed of a shell surrounded by a hood that is connected to a cabinet wall where the cabinet wall and the floor of the shell include openings and the housing is divided by at least one separating wall into an inlet chamber and an outlet chamber that connect to the openings in the floor of the shell. The improvement comprises a blower, having an air outlet, that is located in the inlet chamber of the heat exchanger in such a manner so as to draw air through an air suction opening in the floor of the shell, and then supply that air through an opening in the separating wall to the exchanger unit located in the outlet chamber where the air is cooled and then directed by a drip separator and a baffle plate toward the associated air outlet opening in the floor of the shell.
As a result of the altered air path an overpressure is generated before the exchanger unit. Improved air impaction as compared to the known low pressure embodiment is thereby achieved on the lamellar packet of the exchanger unit with relatively little clearances between the exchanger unit and the blower.
Moreover, as a result of the altered air path a speed variation of the air occurs along the heat exchanger i.e., the air that leaves the heat exchanger has a considerably lower speed as compared to previous air paths. The condensation water drops that form in the heat exchanger can thus drop down to the shell much more readily under the effect of the force of gravity, in order to be led off to the outside by means of the condensation water drainage. The risk of water drops traveling out of the heat exchanger is much slighter in this case, with equivalent blowers, than with previous air paths, since the altered air path permits the condensation water or leakage water to collect on the overpressure side. The direction of drainage thus corresponds to the direction of the air flow. The use of felt in order to, as was previously done, drain off condensation water against the flow of air to the outside is therefore no longer required.
In one embodiment of the invention, baffles or guide plates in the inlet chamber can be eliminated in that the blower draws air axially and expels it through a tangentially directed air outlet that is connected to the separation wall.
In a preferred embodiment of the invention, the separation wall is slightly inclined toward the side with the air outlet opening and the exchanger unit is positioned perpendicular to the separating wall at a distance from the floor of the shell that permits the opening in the separating wall to remain free. This embodiment allows the air drawn through the opening to be guided in a simple manner from the bottom to the top over the exchanger unit.
In yet another embodiment of the invention, the floor under the exchanger unit slants downward in the direction toward the air outlet opening and a condensed water drain is located in the shell next to the air outlet opening. Such embodiment allows
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Pawlowski Adam
Schneider Stefan
Lazarus Ira S.
McKinnon Terrell
Rittal-Werk Rudolf Loh GmbH
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