Process and apparatus for ventilating an enclosed space
OwnerJakob Huberinventor
Life of this patent
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Abstract
A method and apparatus for ventilating an enclosed air space, such as the crawl space under a building, and which includes a controller which is switchable between a cooling mode which activates a ventilating fan upon the temperature in the space reaching a predetermined upper limit and the differential of the temperatures inside and outside of the space reaching a predetermined value, and a heating mode which activates the ventilating fan upon the temperature in the space reaching a predetermined lower limit and the differential of the temperatures inside and outside of the space reaching a predetermined value. The ventilating fan may also be activated by the presence of predetermined concentrations of dangerous or destructive gases, such as radon and water vapor.
Claims14
An apparatus for ventilating an enclosed air space of a building and comprising
- first and second spaced apart openings for admitting air into and from the space,
- ventilating fan means positioned in at least one of said first and second openings,
- control means for operating said ventilating fan means so as to ventilate the space with outside air upon
- (1) the absolute temperature in the space reaching a predetermined upper limit, and the temperature of the outside air being below the temperature of the space by a predetermined differential, and so as to cool the space, and upon
- (2) the absolute temperature in the space reaching a predetermined lower limit, and the temperature of the outside air exceeding the temperature of the space by a predetermined differential, and so as to warm the space.
An apparatus for ventilating an enclosed air space of a building and comprising
- first and second spaced apart openings for admitting air into and from the space,
- ventilating fan means positioned in at least one of said first and second openings,
- an electric circuit for operating said ventilating fan means when the circuit is closed,
- first sensing means for sensing the temperature of the air in the space,
- second sensing means for sensing the temperature in the air outside the space,
- switch means for selectively opening and closing said electric circuit,
- controller means which is switchable between
- (1) a cooling mode wherein the outside temperature is subtracted from the inside temperature to determine the temperature differential, and the switch means is closed if the differential reaches a predetermined minimum,
- (2) a heating mode wherein the inside temperature is subtracted from the outside temperature to determine the temperature differential, and the switch means is closed if the differential reaches a predetermined minimum, and
- (3) an inactive mode wherein the switch means is open,
- thermostat means for switching the controller means to
- (1) its cooling mode when the inside temperature reaches a predetermined upper limit,
- (2) its heating mode when the inside temperature reaches a predetermined lower limit, and
- (3) its inactive mode when the inside temperature is between said predetermined upper and lower limits.
A method of ventilating an enclosed air space, comprising the steps of
- sensing the temperature differential between the air in the space and the outside air,
- sensing the absolute temperature of the air in the space, and
- actively ventilating the space so as to exchange air within the space with outside air whenever
- (1) the temperature of the air in the space reaches a predetermined upper limit, and the temperature of the outside air is below the temperature of the air in the space by a predetermined differential, and so as to cool the space, and whenever
- (2) the temperature of the air in the space reaches a predetermined lower limit, and the temperature of the outside air exceeds the temperature of the air in the space by a predetermined differential, and so as to warm the space.
Dependencies are inferred from the claim text.