A plate-fin panel for a heat exchanger may be either formed as an aluminum extrusion or fabricated from a corrugated metal sheet sandwiched between two flat metal sheets. The extruded aluminum version may be clad with protective sheet metal jackets made of, or coated with, a corrosion resistant Cu-Ni alloy. Individual panel sections can be joined together by tongue and groove engagement to obtain a total desired panel width if available extrusion press or rolling mill capacity is insufficient. The plate-fin panels are assembled into slotted headering plates, and a layer of synthetic plastics potting compound seals dissimilar metal joints against electrolytic corrosion as well as leakage and provides sufficient adhesive strength to reduce or eliminate the need for welding the panels to the headers. Mechanical brush or hydraulic jet apparatus is capable of continuously or intermittently cleaning slime or encrustations from all panel surfaces exposed to seawater.
The cleaning of the condensor of a refrigerating or conditioning unit or plant including a condensor of the refrigerant fluid, with a coil, a finning, and an exhaust fan are performed by a brush horizontal mounted on a support that slides vertically in front of the condensor, in its entire height, from the opposed side respect the aspirator, in two corresponding guides and in the way that the bristles can pass in the interstices of the finning skimming this and the coil; and a driving lever or motor for the movement of the above mentioned support with an alternative motion in the above mentioned vertical guides.
A protecting device for scaling openings of a heat tube and the method for manufacturing the same are disclosed. After punching the rim of a plate-like or tube-like heat tube, a protecting clamp covers thereon. After the protecting clamp clamps the rim, then glue is filled therein to or it passes through a tin furnace for curing. Another, metal, plastic, or glue can cover the rim so as to be formed as a sealing.
This invention is drawn to a brush which cleans dust and debris from refrigeration coils in conventional coolers. When the door is opened, a cable draws a brush upwardly across the face of the condenser coil and removes dust from the coil. The brush is attached to a jointed arm which controls the positioning of the brush and keeps the brush contiguous the coil. A method of operating the device is also disclosed.
This invention describes the roll bonding of Al and Ni-bearing Cu alloys to suitable substrates to produce self-brazing materials for the elevated temperature, aggressive environment application. The Al and Ni-bearing Cu alloy for the self-brazing layers can be obtained by cladding layers of elemental Ni and Al to Cu. The Al content in the self-brazing layers can be varied from 2 to 100%. The Ni content in the self-brazing Cu alloy can be varied from 10 to 100%. Additional alloying elements in the commercial Cu alloys such as Fe, Cr, Si, Mn, Sn and Zn are unavoidable. Trace elements in the commercial alloys such as Pb, Ag and As will also affect the brazing and shall be reduced.
A heat exchanger including a header having a plurality of header openings with rigid tubes that may be made of plastic are inserted in the openings. The tubes are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings with a flange and uses an interference fit between the rigid heat exchange tubes and the header openings. A self-leveling sealant may be used to seal the heat exchanger tubes to the header using, for example, a paint roller and/or a paint sprayer.
