Air circulation control system

Claim 2

An air circulation control system for an enclosure, said enclosure having a floor means and a ceiling means with wall means extending generally around and between said floor and ceiling means, said enclosure having a heated air inlet and outlet means in a lower portion of said enclosure and a cooled air inlet and outlet means in an upper portion of said enclosure, a source of heated air having an inlet and an outlet means, said heated air source outlet means being in communication with said enclosure heated air inlet by means of a first heated air duct means, a second heated air duct means extending from said enclosure heated air outlet to said heated air source inlet whereby said enclosure may be supplied with heated air, a cool Air supply means having an inlet and an outlet, said supply outlet communicating through a first cooled air duct with said cooled air enclosure inlet, a second cooled air duct means exhausting said cooled air through said enclosure outlet and transmitting it to said cooled air inlet whereby effective circulation of said cooled air through said inlet is provided, and control valve means effective to selectively circulate heated air through the heated air inlet and outlet means in the lower portion of the enclosure and cooled air through the cooled air inlet and outlet means in the upper portion of said enclosure.

Claim 3

An air circulation control system according to claim 1 wherein said control valve means is movable between a first position wherein said cooled air is cycled through said first and second cooling duct means and a second position wherein said heated air is cycled through said first and second heating duct means.

Claim 4

An air circulation control system according to claim 2 wherein said system further includes a second control valve means positioned between said second cooled air duct means and said second heated air duct means so that air returning to said heating or cooling source must flow therethrough, said second control valve means having a valve member movable between a first position wherein said cooled air returning in said second cooled air duct means may pass into said cooled air source and a second position wherein said heated air returning through said second heated air duct means may return to said heated air source.

Claim 5

An air circulation control system according to claim 2 wherein said control valve means includes a double seated butterfly valve, said valve being driven by motor means, said motor means being controlled by a thermostat means responsive to air temperatures in the enclosure whereby alternate operation of said heating or cooling source and said valve means may be automatically controlled.

Claim 6

An air circulation control system according to claim 1 wherein said first and second cooling and heating duct means include plenum chamber means whereby said system may be extended to include a plurality of enclosures.

Claim 7

An air circulation control system for an enclosure, said enclosure having a floor means and a ceiling means with wall means extending generally around and between said floor and ceiling means, said enclosure having a heated air inlet and outlet means in a lower portion of said enclosure and a cooled air inlet and outlet means in an upper portion of said enclosure, a source of heated air having an inlet and an outlet means, said heated air source outlet means being in communication with said enclosure heated air inlet by means of a first heated air duct means, a second heated air duct means extending from said enclosure heated air outlet to said heated air source inlet whereby said enclosure may be supplied with heated air, a cool air supply means having an inlet and an outlet, said supply outlet communicating through a first cooled air duct with said cooled air enclosure inlet, a second cooled air duct with said cooled air enclosure inlet, a second cooled air duct means exhausting said cooled air through said enclosure outlet and transmitting it to said cooled air inlet whereby effective circulation of said cooled air through said inlet is provided, a first control valve means movable between a first position wherein said cooled air is cycled through said first and second cooling duct means and a second position wherein said heated air is cycled through said first and second heating duct means, a second control valve means positioned between said second cooled air duct means and said second heated air duct means so that air returning to said heating or cooling source must flow therethrough, said second control valve means movable between a first position wherein said cooled air returning in said second cooled air duct means may pass into said cooled air source and a second position wherein said heated air retUrning through said second heated air duct means may return to said heated air source, and a third control valve means positioned between said second control valve means in said source of heated and cooled air, and said third valve means movable between a position wherein said air passing through said second control valve means may flow directly to said source of cooled or heated air and a second position wherein said air passing through said second control valve means is exhausted from said system and fresh air may be drawn into said system.

Claim 8

An air circulation control system for an enclosure, said enclosure having a floor means and a ceiling means with wall means extending generally around and between said floor and ceiling means, said enclosure having a heated air inlet and outlet means in a lower portion of said enclosure and a cooled air inlet and outlet means in an upper portion of said enclosure, a source of heated air having an inlet and an outlet means, said heated air source outlet means being in communication with said enclosure heated air inlet by means of a first heated air duct means, a second heated air duct means extending from said enclosure heated air outlet to said heated air source inlet whereby said enclosure may be supplied with heated air, a cool air supply means having an inlet and an outlet, said supply outlet communicating through a first cooled air duct with said cooled air enclosure inlet, a second cooled air duct with said cooled air enclosure inlet, a second cooled air duct means exhausting said cooled air through said enclosure outlet and transmitting it to said cooled air inlet whereby effective circulation of said cooled air through said inlet is provided, a first control valve means movable between a first position wherein said cooled air is cycled through said first and second cooling duct means and a second position wherein said heated air is cycled through said first and second heating duct means, a second control valve means positioned between said second cooled air duct means and said second heated air duct means so that air returning to said heating or cooling source must flow therethrough, said second control valve means movable between a first position wherein said cooled air returning in said second cooled air duct means may pass into said cooled air source and a second position wherein said heated air retUrning through said second heated air duct means may return to said heated air source, and a third control valve means positioned between said second control valve means in said source of heated and cooled air, and said third valve means movable between a position wherein said air passing through said second control valve means may flow directly to said source of cooled or heated air and a second position wherein said air passing through said second control valve means is exhausted from said system and fresh air may be drawn into said system.

Claim 9

An air circulation control system for an enclosure, said enclosure having a floor means and a ceiling means with wall means extending generally around and between said floor and ceiling means, said enclosure having a heated air inlet and outlet means in a lower portion of said enclosure and a cooled air inlet and outlet means in an upper portion of said enclosure, a source of heated air having an inlet and an outlet means, said heated air source outlet means being in communication with said enclosure heated air inlet by means of a first heated air duct means, a second heated air duct means extending from said enclosure heated air outlet to said heated air source inlet whereby said enclosure may be supplied with heated air, a cool air supply means having an inlet and an outlet, said supply outlet communicating through a first cooled air duct with said cooled air enclosure inlet, a second cooled air duct means exhausting said cooled air through said enclosure outlet and transmitting it to said cooled air inlet whereby effective circulation of said cooled air through said inlet is provided, a control valve means movable between a first position wherein said cooled air is cycled through said first and second cooling duct means and a second position wherein said heated air is cycled through said first and second heated duct means, said control valve means including a double seated butterfly valve, a motor driving said valve, a thermostat controlling said motor, and a housing having first and second dividing means intersecting each other at their central portion and each having a pair of openings on opposite sides of the central portion, a pivotally mounted closure member having closure pieces on opposite sides of said axis and movable about said axis between a first position effectively closing the openings in said second dividing means and opening the openings in said first dividing means and a second position closing the previously opened openings in said first dividing means and opening the previously closed openings in the second dividing means.

Claim 10

An air circulation control system for an enclosure, said enclosure having a floor means and a ceiling means with wall means extending generally around and between said floor and ceiling means, said enclosure having a heated air inlet and outlet means in a lower portion of said enclosure and a cooled air inlet and outlet means in an upper portion of said enclosure, a source of heated air having an inlet and an outlet means, said heated air source outlet means being in communication with said enclosure heated air inlet by means of a first heated air duct means, a second heated air duct means extending from said enclosure heated air outlet to said heated air source inlet whereby said enclosure may be supplied with heated air, a cool air supply means having an inlet and an outlet, said supply outlet communicating through a first cooled air duct with said cooled air enclosure inlet, a second cooled air duct means exhausting said cooled air through said enclosure outlet and transmitting it to said cooled air inlet whereby effective circulation of said cooled air through said inlet is provided, a control valve means movable between a first position wherein said cooled air is cycled through said first and second cooling duct means and a second position wherein said heated air is cycled through said first and second heated duct means, said control valve means including a double seated butterfly valve, a motor driving said valve, a thermostat controlling said motor, and a housing having first and second dividing means intersecting each other at their central portion and each having a pair of openings on opposite sides of the central portion, a pivotally mounted closure member having closure pieces on opposite sides of said axis and movable about said axis between a first position effectively closing the openings in said second dividing means and opening the openings in said first dividing means and a second position closing the previously opened openings in said first dividing means and opening the previously closed openings in the second dividing means.

Claim 11

An air circulation control system according to claim 7 wherein said first and second dividing means is formed of two integral pieces, each of said pieces being bent at a central portion approximately ninety degrees to form an apex, said portions being positioned in said housing with their apexes spaced from each other a distance to allow said closure member to move therebetween between said first and second positions.

Claim 12

An air circulation system according to claim 8 wherein said closure member includes an axle means extending through said central portion, said housing having end portions, said axle extending through said housing end portions, at least one end of said axle engaging a motor means whereby said closure member may be moved between said first and second positions by said motor means.

Claim 13

An air circulation control system according to claim 9 wherein said enclosure includes a thermostatic control means, said thermostatic control means being operable to activate said cooled air means when the temperature in said enclosure rises above a preselected temperature and being operable to operate said heated air source means when the temperature in said enclosure falls below a preselected temperature, said control valve means being wired to said cooling and heating means whereby activation of said cooling means moves said closure member to said first position and activaTion of said heating means moves said closure member to said second position.