Energy conserving heating and air conditioning system

Claim 2

A control system for office building air conditioning equipment comprising heating, ventilating and refrigerating apparatus having separate electric circuit means controlling the heating, ventilating and refrigerating components comprising first circuit means adapted to be operatively connected to and controlling energization of said refrigerating and said ventilating circuit means, second circuit means adapted to be operatively connected to and controlling energization of said ventilating circuit means, first time controlled switch means positioned in said first circuit means operable to be closed at a selected hour in the A.M. to place said refrigerating and said ventilating circuits in condition for operation and operable to be opened at a selected hour in the P.M. to inactivate said refrigerating and said ventilating circuits, second time controlled switch means positioned in said second circuit means operable to control the same to control operation of said ventilating circuit means independently of said first circuit means and said second time controlled switch means being operable to be closed at a selected later hour in the A.M. and opened at a selected later hour in the P.M. than said first time controlled switch means whereby said ventilating circuit means is operable to remain energized for a selected time after deenergization of said refrigerating circuit means.

Claim 3

A control system according to claim 1 including a third time controlled switch means positioned in said second circuit means and operable to inactivate said ventilating circuit means at selected times during the period that said second circuit means is activated by closure of said second time controlled switch means.

Claim 4

A control system according to claim 1 including thermostatic switch means positioned in said first circuit means and responsive to outside and inside temperatures to activate said first circuit means when the outside and inside temperatures are both above predetermined values during the time said first circuit means is activated by closure of said first time controlled switch means.

Claim 5

A control system according to claim 1 in which said first circuit means includes thermostatic switch means positioned outside and operable to be closed to activate said first circuit means upon occurrence of a temperature below a predetermined value.

Claim 6

A control system according to claim 1 in which the ventilating control circuit includes by-pass time controlled switch means operable to activate said ventilating control circuit means for selected periods of time when the control system is otherwise inactivated by opening of said first and said second time controlled switch means.

Claim 7

A control system according to claim 5 in which said second time controlled switch means includes initially closed contacts which are opened upon closure of said second time controlled switch means and which are positioned to inactivate the control of said ventilating control circuit means by said by-pass time controlled switch means during the period that said second time controlled switch means is closed.

Claim 8

A control system according to claim 1 including manually operated switch means positioned in at least one of the circuits to permit manual activation and de-activation thereof.

Claim 9

A control system according to claim 1 including an electric pilot light positioned in at least one of said circuit means to indicate when said circuit means is activated.

Claim 10

A control system according to claim 1 in which said heating, ventilating and refrigerating equipment is for a multistory building and includes separate ventilating means for each story having separate electric circuit means therefore, and said first circuit means and said second circuit means being adapted to be operatively connected to and control energization of each of said separate ventilating electric circuit means.

Claim 11

A control system according to claim 9 in which said second circuit means includes a plurality of parallel circuit means adapted to be connected to each of the respective circuit means controlling ventilating components on the respective stories of the building, third time controlled switch means positioned one in each of said parallel circuit means and operable to inactivate individual ventilating circuit means for separate stories of the building at selected times during the period that said second circuit means is activated by closure of said second time controlled switch means.

Claim 12

A control system according to claim 10 including thermostatic switch means positioned in said first circuit means and responsive to outside and inside temperatures to activate said first circuit means when the outside and inside temperatures are both above predetermined values during the time said first circuit means is activated by closure of said first time controlled switch means.

Claim 13

A control system according to claim 10 in which said first circuit means includes thermostatic switch means positioned outside and operable to be closed to activate said first circuit means upon occurence of a temperature below a predetermined value.

Claim 14

A control system according to claim 10 in which each of said ventilating control circuit means includes by-pass time controlled switch means operable to activate selected ventilating control circuit means for selected periods of time when the control system is otherwise inactivated by opening of said first and said second time controlled switch means.

Claim 15

A control system according to claim 13 in which said second time controlled switch means includes initially closed contacts which are opened upon closure of said second time controlled switch means and which are positioned to inactivate the control of said ventilating control circuit means by said by-pass time controlled switch means during the period that said second time controlled switch means is closed.

Claim 16

A control system according to claim 10 in which said third time controlled switch means includes an electric timing motor and circuit means to energize the same and a plurality of separate switch contacts positioned in each of said parallel circuit means, said second time controlled switch means includes an electric timing motor and circuit means to energize the same and a plurality of separate switch contacts, said first time controlled switch means includes electric timing motor and circuit means to energize the same and a plurality of separate switch contacts.

Claim 17

A control system according to claim 15 in which said first circuit means includes a first relay coil and a plurality of switch contacts operated thereby, first thermostatic switch means positioned in said first circuit means in series with said first relay coil, said first thermostatic switch means including means responsive to temperatures both inside and outside the building and having switch contacts closed when the inside and outside temperatures are both above predetermined values, said first circuit means including initially open contacts operated by said first relay coil positioned in series with said first relay coil and in parallel with said first thermostatic switch means, said second circuit means including a second relay coil and a plurality of switch contacts operated thereby, second thermostatic switch means having initially open switch contacts positioned in said second circuit means and operable to be closed in response to decrease in outside temperatures below a predetermined value, the circuit means for the timing motor of said third time controlled switch means including in series therewith and in parallel with each other initially open contacts operated by said second time controlled switch means and initially open contacts of said first and said second relay coils, and the initially open contacts of said third time controlled switch means being positioned in said second circuit means in series with switch contacts connected in parallel with each other, said last named switch contacts being initially open contacts being operated respectively by said second time controlled switch means, said first relay coil and said second relay coil.

Claim 18

A control system according to claim 16 including a plurality of manually operated switches positioned in selected circuits to permit activation thereof independently of the operation of the various automatically operated switched controlling said circuits.

Claim 21

A method according to claim 18 which includes activating and deactivating said ventilating apparatus for selected times during the period that the same is otherwise activated by said first named and second named activation steps.