摘要:
A plate and fin type heat exchanger has a heat exchanger core made from a plurality of stacked, alternating first and second heat exchange plates of a generally inverted, U-shaped cross-section. Each plate has a top wall, closed peripheral sidewalls and open ends, and the open ends of the first plates are oriented at 90° to the open ends of the second plates. The sidewalls of the plates have end portions, which in adjacent plates, are aligned to form corners of the heat exchanger core. Opposed U-shaped manifold bodies are provided having open ends and lateral walls joined in a fluid tight manner to the aligned plate sidewall end portions. End plates close off the open ends of the U-shaped bodies to form manifolds. The corners formed by the aligned plate sidewall end portions allow for an improved connection between the heat exchanger core and the U-shaped manifold bodies. This helps to ensure that a fluid tight seal is created between the heat exchanger core and the manifold bodies when the components are joined together.
摘要:
A vehicle heat exchanger tube (2) comprises at least a first and a second separate fluid channel (14, 16). A tube stiffener (38) has a first stiffening portion (40) stiffening the first channel (14) of the tube (2), and a second stiffening portion (42) stiffening the second channel (16) of the tube (2). The first stiffening portion (40) comprises a first supporting surface (46) supporting the first larger surface (20) of the first channel (14), and a second supporting surface (48) supporting the second larger surface (22) of the first channel (14). The second stiffening portion (42) comprises a first supporting surface (56) supporting the first larger surface (26) of the second channel (16), and a second supporting surface (58) supporting the second larger surface (28) of the second channel (16).
摘要:
Offenbart ist ein Plattenheizkörper (1) mit einer vorderen Heizplatte (2) und mindestens einer hinteren Heizplatte (3), mit einem Vorlaufanschluss (25) an einer Unterseite (5) des Plattenheizkörpers (1) zum Anschließen der vorderen Heizplatte (2) an einen bodenseitigen Heizmittelvorlauf, mit mindestens einem an einer Oberseite (6) des Plattenheizkörpers (1) an die vordere Heizplatte (2) angeschlossenen Heizmittelrohr (7), und mit einem Ventilanschluss (14) für ein Regelventil (15), durch das im Heizbetrieb des Plattenheizkörpers (1) das Heizmittel aus der vorderen Heizplatte (2) in die mindestens eine hintere Heizplatte (3) geführt wird. Um die Bedienung insbesondere eines nahezu raumhohen Plattenheizkörpers (1) mit "serieller" Durchströmung zu vereinfachen wird vorgeschlagen, einen Ventilträger (13) unterhalb des Heizmittelrohrs (7) vorzusehen, der den Ventilanschluss (14) aufweist, wobei im Heizbetrieb das Heizmittel aus der vorderen Heizplatte (2) nur durch den Ventilträger (13) in die mindestens eine hintere Heizplatte (3) fließt.
摘要:
One of these heat exchangers (76) consists of a stack of thin-metal walled hollow platelets (7S1-J5), 12 cm long and 5 wide. Each of these walls has a central region stiffened by alternating bosses with steep slopes, situated between two connection regions. Each wall is made by pressing then cutting an appropriate sheet of metal (aluminium 0.3 mm thick). The edges of the two fin walls form steps, symmetrically welded, the height of each step determining the internal half-thickness of a fin. Each platelet connection region ends in a narrow mouth with a cross section that has the same surface area as the embossed central region, and is welded to the edges of a slot made in an external manifold (80-82). The thickness of the internal channel of a platelet is about 0.4 mm when the fluid concerned is a liquid (water) and that of the spaces between the platelets is 7 mm when the other fluid is a gas (air). By hot pressing or thermoforming, sheets of glass or polymer may also be used but the performance is not as good. A radiator can be made of several exchangers mounted in parallel on each side of two flat main manifolds. Applications: any heat exchangers with high volumetric conduction, low weight and low pumping and ventilating power.
摘要:
A refrigerating system, comprising an orifice tube system having such a refrigerating cycle that refrigerant flows through a compressor (1), a condenser (10), an orifice tube (3), an evaporator (4), and an accumulator (5) in that order and returns to the compressor (1), the condenser (10) further comprising a multi-flow type heat exchanger having a plurality of paths (P1) to (P3), wherein the intermediate path (P2) is formed as a decompression path for reducing the pressure of the refrigerant, after the refrigerant is condensed by the first path (P1), the condensed refrigerant is decompressed and evaporated by the decompression path (P2), and the evaporated refrigerant is re-condensed by the third path (P3), whereby excellent response characteristics to a variation in a thermal load on the condenser and a sufficient refrigerating performance can be provided.
摘要:
A compact high efficient air heater (10) providing improved comfort regulation. The air heater includes a cross-flow type heat exchanger (18) formed from a plurality of stacked corrugated plates (58a and 58b) which define a plurality of alternating flue gas passages and air passages and which include a plurality of modified air passages which provide increased air flow through the heat exchanger along the flue gas inlet side (66) whereby increased heat transfer along the flue gas inlet side is accomplished. The air heater also includes a plurality of bypass channels (72) which direct air flow across at least one surface of the combustion chamber (14) to remove heat from the combustion chamber housing, to lower the temperature of the flue gases entering the heat exchanger, and to reduce the temperature gradient at the air outlet side (64) of the heat exchanger.
摘要:
The present invention relates to a process for producing a flat heat exchange tube (B) having parallel fluid passages (6) in its interior and comprising an upper wall (1), a lower wall (2), right and left side walls (34) interconnecting right and left side edges of the upper and lower walls and a plurality of reinforcing walls (5, 14) connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another, by brazing a first tube component member (31) of aluminum and a second tube component member (32) of aluminum into an integral assembly, the first component member including a lower wall (2) forming portion and a plurality of reinforcing wall (5, 14) forming portions integral with and extending upward from the lower wall forming portion, the second component member including an upper wall (1) forming portion comprising a brazing sheet having a brazing material layer over at least the lower of upper and lower surfaces thereof. The process comprising roughing the lower surface of the upper wall (1) forming portion of the second component member to mar an oxide film produced over the surface in advance, tacking the two component members together (31, 32), and thereafter brazing the two component members.
摘要:
Die Erfindung betrifft einen Kühler für Kraftfahrzeuge mit einem Rippen - Rohr - Block, bestehend aus Flachrohren mit dazwischen angeordneten Rippen, wobei die umgeformten Enden der Flachrohre in gegenüberliegenden Sammel - oder Umlenkkästen münden und mit den Längsseiten der umgeformten Enden untereinander verbunden sind wobei die Enden der Flachrohre von den Verbindungsrändern der Sammel - oder Umlenkkästen umfaßt und mittels Löten verbunden sind. Ferner betrifft die Erfindung ein Verfahren zur Herstellung solcher Kühler, bei dem der Rippen - Rohr - Block mit den Sammel - oder Umlenkkästen gleichzeitig verlötet werden. Der Kühler wird in seiner Herstellung vereinfacht und in seiner Funktion verbessert, wenn erfindungsgemäß die Flachrohre (2) aus zwei Rohrhälften (2a; 2b) bestehen, wovon mindestens eine Rohrhälfte an ihren Enden (4) quer zur Längsrichtung abgebogen ist, wobei die Abbiegung (8) eine Längsseite des Flachrohres (2) ausbildet, die etwa mit dem Ende der Längsseite des benachbarten Flachrohres (2) eine Verbindungsfläche (9) bildet und wenn die Sammel - oder Umlenkkästen (5) mit ihren Verbindungsrändern (7) bis über die Abbiegung (8) hinweg reichen und mit den Längsrändern (10) der Rohrhälften (2a; 2b) verbunden sind. Ein erstes erfindungsgemäßes Verfahren sieht vor, daß Flachrohrhälften aus Blechband (21) unter Umformung der Längsränder hergestellt und auf Länge geschnitten werden, daß dann entweder zuerst an den Enden mindestens einer der Flachrohrhälften eines jeden Flachrohres mindestens eine Abbiegung quer zur Längsrichtung der Flachrohrhälften angebracht wird, und danach beim Zusammenfügen des Rippen-Flachrohr-Blocks Verbindungsflächen zwischen den abgebogenen Enden einer Flachrohrhälfte mit den Enden des benachbarten Flachrohres gebildet werden, oder daß zuerst die Flachrohrhälften zu Flachrohren zusammengefügt und mit den Rippen (3) zum Rippen - Flachrohr -Block zusammengesetzt werden und danach die Enden mindestens einer Flachrohrhälfte eines jeden Flachrohres durch Einführen eines Werkzeuges so weit abgebogen werden, daß sie mit den Enden (4) der Flachrohrhälfte des benachbarten Flachrohres eine Verbindungsfläche ausbildet und daß die Sammel-oder Umlenkkästen mit ihren Verbindungsrändern über die Längsränder der Flachrohrhälften geschoben werden. Ein alternatives Herstellungsverfahren sieht die Verwendung von Flachrohrhälften vor, die miteinander an ihren Schmalseiten verschweißt sind.
摘要:
A compact high efficient air heater (10) providing improved comfort regulation. The air heater includes a cross-flow type heat exchanger (18) formed from a plurality of stacked corrugated plates (58a and 58b) which define a plurality of alternating flue gas passages and air passages and which include a plurality of modified air passages which provide increased air flow through the heat exchanger along the flue gas inlet side (66) whereby increased heat transfer along the flue gas inlet side is accomplished. The air heater also includes a plurality of bypass channels (72) which direct air flow across at least one surface of the combustion chamber (14) to remove heat from the combustion chamber housing, to lower the temperature of the flue gases entering the heat exchanger, and to reduce the temperature gradient at the air outlet side (64) of the heat exchanger.