Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Patent
1980-07-21
1983-02-15
Cline, William R.
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
165148, F28F 926
Patent
active
043735770
DESCRIPTION:
BRIEF SUMMARY
The radiators or heat exchanger assemblies presently used in conjunction with internal combustion engines of the vast majority of motor vehicles are of square or rectangular shape with a thickness dependent upon the number of rows of tubes used in the core assembly. The radiators generally include a top tank, a core assembly of fins and vertical tubes, and a receiver or bottom tank. The liquid coolant flows under pressure from the engine to the top tank then passes downwardly through the vertical tubes to the bottom tank and then back into the engine. Usually the engine is provided with a fan which is disposed adjacent to one side of the core assembly and operates to suck air from the front of and through the core assembly. The air flowing through the core assembly dissipates the heat being transferred by the fins from the tubes. Inasmuch as the conventional motor vehicle radiator is square or rectangular in shape and the fan blades circumscribe a circular path, the air flow generated by the fan does not pass over the bottom and top tanks nor through the corner areas of the core assembly. Furthermore, radiators presently in use are limited in size or in frontal area by the allowable room within the engine enclosure compartment of the motor vehicle as well as by the effective sweep of the fan across the core assembly.
With the advent of increased power requirements and, consequently, engines of greater horsepower, motor vehicle designers are being confronted with the vexing problem of providing adequate cooling capacity for such larger engines. Increasing the speed and/or the diameter of the fan while increasing the cooling capacity of a given size core frontal area also increases the operating sound or noise and approaches the critical speed limit of the fan. The problem becomes more acute when Governmental Regulations relating to noise pollution and the establishment of permissible noise levels of motor vehicles is taken into account. Some manufacturers have attempted to solve the problem by employing a cross-flow type radiator wherein the liquid coolant flows horizontally across the core assembly rather than vertically as in the conventional motor vehicle engine radiator. However, the cross-flow type radiator design has several limitations of its own. Inherently, it is difficult to get the proper fan sweep of the core assembly because of the required horizontal length (transversely of the vehicle) of the core assembly, as an example.
The problem of providing the proper cooling of motor vehicle engines will become more difficult in the future because of anticipated Department of Transportation Rules and Regulations permitting engines of nearly double the horsepower now employed in motor vehicles. Obviously, such larger engines will require cooling systems having considerably greater heat rejection capacities then now presently available. It is believed that radiators of the type presently available commercially for motor vehicles have reached their ultimate end and cannot be designed in their square or rectangular shape to achieve the cooling requirements of the future.
This invention relates to a new and improved heat exchange assembly and, more particularly, to a generally annular or toroidal radiator wherein a generally annular core assembly is sandwiched between fore and aft liquid coolant distributor tanks, and wherein a rotary blower is encircled by the tanks and core assembly and is capable of drawing cooling air axially and discharging the same radially outwardly through the core assembly and over the exterior of the fore and aft tanks achieving substantially one hundred percent sweep of the heat dissipating surfaces of the heat exchanger assembly.
An important object of the present invention is the provision of a heat exchanger assembly fabricated from a relatively few number of parts and in which the fore and aft distribution tanks serve as heat dissipating means along with the entire core assembly.
Still another object is the provision of a compact, highly efficient, toroidal or generally annul
AuBuchon F. David
Cline William R.
International Harvester Co.
Krubel Frederick J.
Streule, Jr. Theophil W.
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