Heat exchange – With solids separator for exchange fluid
Patent
1988-07-28
1989-11-07
Ford, John
Heat exchange
With solids separator for exchange fluid
165 51, 165916, 165154, 123 4133, 123196AB, 184 622, 1841043, 210130, 210184, 210186, F01M 500, F28D 710
Patent
active
048785369
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for filtering a first medium while simultaneously effecting an exchange of heat between the first medium and a second medium.
There is, in many cases, a need both to filter a medium and to change the temperature thereof. One obvious example in this regard is the filtration and cooling of lubricants in internal combustion engines, transmission systems, and also the hydraulic fluids of hydraulic systems. Despite the fact that the medium of the filtered and cooled in such cases, and in many other cases, is one and the same, there is used in the majority of cases separate devices for filtering and for cooling the medium, these devices being connected together in series and through passed by the medium is an ordered sequence. One reason for this is because filters can be produced as inexpensive devices for one-time use only and are changed several times during the active life time of the system. On the other hand present day conventional heat exchangers, the function of which is based on a turbulent flow of the two heat transfer media, are many times more expensive than filter components, and are hence designed to remain effective throughout the active life time of the system without requiring to be replaced.
In many cases, however, the heat exchanger is forced to work with media which are contaminated or which give rise to deposits on the heat-exchange contact surfaces. In the case of present day conventional heat exchangers which operate with turbulent flow, these coatings or deposits reduce the heat-transfer efficiency of the heat exchanger to an extent which necessitates cleaning the heat exchanger or replacing the same with a new heat exchanger, at regular intervals. From a maintenance or service aspect, the heat exchanger is normally cleaned or replaced in conjunction with a filer change, and it would be beneficial if the heat exchanger could be produced at such a low price as to enable it to be used as a disposable unit intended for one-time use only. In this case essential advantages would be afforded if the filter and heat exchanger were incorporated in a single, easily exchangeable component.
In the case of automotive vehicle, which in terms of volume dominate the field of both filters and oil coolers, the need to cool the oil used in vehicles has progressively increased in keeping with the increasing power and decreasing volumes of vehicle engines and transmission systems. Despite being mass produced, present day conventional vehicle oil coolers, the function of which is based on turbulent flow of the oil and the cooling medium, which is water or a mixture of water and glycol, are so expensive that they are used only when it is more or less absolutely necessary. The engines and transmissions of modern day vehicles, however, work to a progressively increasing extent at very high temperatures, which without cooling the oil will jeopardize or reduce the useful life and reliability of the system. Consequently, there is a strong desired to use oil coolers in the majority of engines and in many transmission systems, provided that such use can be effected at low total costs and with the aid of compact and reliable constructions which can be built into the engine and transmission system.
The most effective technique at present available with respect to compact heat exchangers is based on turbulent flow and on the use of so-called turbulence generators which engender a thin laminar boundary layer or interface at the contact surfaces of the heat-transfer media and therewith a relatively high transferred effect. A heat exchanger which is constructed in accordance with this hitherto most effective technique, for instance a wateroil cooler for engines or transmissions, will have roughly the same size as an oil filter but, as beforementioned, will be many times more expensive. The combination of a filter and heat exchanger of unchanged construction into one single assembly or unit would result in a relatively large component for which space would be hard to find and
REFERENCES:
patent: 1900821 (1933-03-01), Kline
patent: 2432475 (1947-12-01), Griffith
patent: 2437489 (1948-03-01), Vokes
patent: 2713422 (1955-07-01), James
patent: 3762467 (1973-10-01), Poon et al.
patent: 3887467 (1975-06-01), Johnson
patent: 4246109 (1981-01-01), Manders
patent: 4662435 (1987-05-01), Bohlin
patent: 4669533 (1987-06-01), Hehl
Ford John
Hypeco AB
LandOfFree
Combined filter and heat exchanger does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combined filter and heat exchanger, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined filter and heat exchanger will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-78211