Refrigeration – With vehicle feature – Utilizing motion of vehicle
Patent
1984-06-19
1985-10-29
Tapolcai, William E.
Refrigeration
With vehicle feature
Utilizing motion of vehicle
622594, 261104, 261DIG3, B60H 304
Patent
active
045494061
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a device for external cooling of vehicle interiors of any type by withdrawal of the heat of evaporation under the action of the relative wind.
The purpose of such a device is under intense sunshine and/or high outer temperature to keep the temperature in the respective vehicle interior within acceptable and pleasant limits.
Cooling devices for vehicles are known which operate in a thermodynamic cyclic process with the aid of compressors or absorbers. They are complicated both technically and as regards their energy consumption and are correspondingly expensive. Furthermore, German Pat. No. 887,010, German specification as laid open to inspection No. 2,528,507 and German utility model Nos. 1,926,094 and 7,623,373 disclose devices for cooling vehicle interiors in which the principle of withdrawing heat by evaporation of a liquid under the action of the relative wind is utilized. In one type of cooling device, cooled air is blown into the vehicle interior and in another type a cooled liquid is conducted through radiators disposed in the vehicle interior. In another third type a mat is used which is placed on the roof or a wall of the vehicle compartment and impregnated with the liquid to be evaporated, inter alia water, from a reservoir. The relative wind moves over said mat in order to withdraw heat from the roof or wall by evaporation. Although in particular the latter construction is simple and requires no power, hitherto it had defects which prevented it from becoming widely used. For instance, the mat must either be relatively thick in order to absorb enough water itself or it must be disposed above the respective large-area reservoir. In both cases the heat passage to the evaporation surface is very restricted, particularly since at the bottom a water-impermeable layer or trough is necessary which is generally of plastic to permit adaptation to the roof or wall form.
SUMMARY OF THE INVENTION
The invention is intended to obviate these defects. Consequently, the invention set forth in the claims solves the problem of providing a device for cooling vehicle interiors which is technically and operatively simple, requires no energy apart from the relative wind and the heat to be withdrawn, requires no replenishment over long journeys, but is nevertheless efficient.
The advantages achieved with the invention are due substantially to the fact that the respective mat with small wall thickness can lie directly snug on the roof or wall of the vehicle cabin, ensuring a good heat transfer with practically no delay, and that the mat can nevertheless be supplied to an adequate extent for long periods of time with the liquid to be evaporated from a reservoir.
The invention will be explained hereinafter with reference to an example of embodiment illustrated in the drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
The single FIGURE of the drawing shows a vertical section through the device, in this case mounted on the roof of a vehicle cabin, in the longitudinal direction of the vehicle.
DESCRIPTION OF THE PREFERRED EMBODIMENT
On the roof 1 of the vehicle travelling in the direction of the arrow 1a, transversely to the travelling direction, a container 2 is mounted, for example in the manner of a ski rack, the bottom 2a of which lies at least at its front and/or rear edge closely on the roof 1. For this purpose, the bottom 2a can be made elastically deformable at least at the respective edge or alternatively and preferably the container 2 as a whole can be made elastically deformable. The purpose of the close engagement is to ensure that the relative wind passes only over the container 2 which by the way has substantially the profile of a so-called spoiler. That is, the top of container 2 smoothly curves up from the roof 1 and to the rear in the travel direction. Container 2 is also elongated in a direction transversely to the travel direction 1a.
The container 2 comprises a cover 3 which extends substantially over its entire length and which is pivotal in
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patent: 2031055 (1936-02-01), McKinney
patent: 2151097 (1939-03-01), Germonprez
patent: 2552819 (1951-05-01), Schwarzmayr
patent: 2587197 (1952-02-01), Mousel
patent: 2800306 (1957-07-01), Freeman
patent: 2959032 (1960-11-01), Davis
patent: 3144970 (1964-08-01), Beschmann
patent: 3606982 (1971-09-01), Anderson
Ebner Anneliese
Kranauer Erwin
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