Building heating and cooling system

• US 3,882,928 A
• Filed: 03/01/1974
• Issued: 05/13/1975
• Est. Priority Date: 03/01/1974
• Status: Expired due to Term

• Current Assignee: Joseph F. Gazzo
• Original Assignee: Joseph F. Gazzo
• Inventors: Gazzo, Joseph F.
• Primary Examiner(s): Sukalo, Charles
• Application Number:
  US05/447,380
• Time in Patent Office: 438 Days
• Field of Search: 165/12,22,26,27
• US Class Current: 165/212
• CPC Class Codes: F24F 11/00 Control or safety arrangements
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/61 using timers
• CPC Class Codes: F24F 11/72 for controlling the supply of treated air, e.g. its pressure
• CPC Class Codes: F24F 11/74 for controlling air flow rate or air velocity
• CPC Class Codes: F24F 11/84 using valves
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2221/54 Heating and cooling, simultaneously or alternatively
• CPC Class Codes: G05D 23/1904 variable in time
• CPC Class Codes: G05D 23/275 with sensing element expanding, contracting, or fusing in response to changes of temperature

Abstract

A home includes a zone of rooms used in the daytime and a second zone includes rooms used in the evening. A furnace is provided for heating and cooling each of the rooms in each of the zones. A damper having a reversible motor is provided in each of the ducts applying conditioned air to each of the rooms. The fuel valve is controlled by separate thermostats for each of the zones in turn controlled by a clock timer. At the beginning of the evening period the clock timer closes a circuit through the reversible motors closing the dampers in the daytime rooms and opening the dampers in the nighttime rooms and also closing a circuit through the nighttime thermostat for operating the solenoid fuel valve. When the damper has moved to its open or closed position it opens a limit switch stopping the reversible motor. The other switch is closed and ready to make a circuit through the reversible motor at the beginning of the daytime period as set on the clock timer when a circuit will then be made again through the reversible motor closing the dampers in the rooms in the nighttime zone and opening the dampers in the rooms in the daytime zone. The circuit through the nighttime thermostat is now open and the daytime thermostat is closed for controlling the fuel valve. Similar dampers may be provided in the air return ducts if desired. A manual switch is provided for each damper which, when actuated, opens up the circuits including the clock timer thereby holding the dampers in either closed or opened positions as desired.

Claims

1. A building heating and cooling system for providing conditioned air alternately to two zones of the building comprising, a conditioned air source having an electrical control means movable between open and closed positions, an output conditioned air duct connected between each zone and said air source, a damper in each duct having a reversible motor for moving said damper between open and closed positions, a pair of limit switches alternately opened and closed by said damper as it moves between said open and closed positions, a thermostat for each zone, a clock timer connected to an electrical power source and including alternate circuits therethrough for operating said damper motors, a first circuit for operating said electrical control means including said power source, one timer circuit, a thermostat for one zone and said electrical control means, a second circuit for operating said electrical control means including said power source, the other timer circuit, the thermostat for the other zone and said electrical control means whereby said electrical control means at times set on said timer is operated by said one circuit and at other times by said second circuit, a third circuit for operating said damper motors and opening said dampers in one zone and closing them in the other zone including said electrical power source, said one timer circuit, one of said limit switches and said damper motor, a fourth circuit for operating said damper motors and closing said dampers in one zone and opening them in the other zone including said electrical power source, the other timer circuit, the other of said limit switches and said dampeR motor whereby at times said conditioned air source supplied conditioned air only to said one zone of said building having dampers open and at other times supplies air only to said other zone having dampers open.

2. The structure of claim 1 wherein return air ducts extend between said zones and said conditioned air source and motor operated dampers are provided in said ducts for operation with the dampers in said output ducts whereby said dampers in said output and return ducts are simultaneously either open or closed for each zone.

3. The structure of claim 1 wherein fifth and sixth circuits are provided for manually operating said dampers in each of said zones, said fifth and sixth circuits each including said power source, a normally open switch, and said damper motor and means for rendering said fourth and fifth circuits inoperative whereby selected dampers in each zone can be maintained continuously selectively open or closed independently of said timer.

4. The structure of claim 3 wherein said means for rendering said third and fourth circuits inoperative includes a linkage means connecting said normally open switches to normally closed switches in said third and fourth circuits and upon said normally open switches being actuated to a closed position said normally closed switches are moved to an open position.

5. The structure of claim 1 wherein said first circuit of said clock timer is open during night hours and closed during day hours and said second circuit is closed during night hours and open during day hours.

6. The structure of claim 1 wherein said electrical control means for said conditioned air source is further defined as a solenoid valve in a fuel line connected to said conditioned air source further defined as a furnace having a burner for hot air and an air conditioner for cool air.

7. The structure of claim 1 wherein said first zone is further defined as including the day living rooms of a house and the second zone includes the evening rooms.

8. The structure of claim 1 wherein said limit switches are normally closed and said damper upon reaching an open position actuates said one limit switch in said third circuit to an open position thereby opening the third circuit and stopping the damper motor, and said damper upon reaching a closed position actuates said other limit switch in said fourth circuit to an open position thereby stopping the damper motor.

9. The structure of claim 8 wherein said dampers include a shaft extending outwardly of said duct and an actuating arm is provided on said shaft to move therewith and said limit switches are positioned in the path of said actuating arm for alternate engagement therewith as said damper moves between said open and closed positions.

10. The structure of claim 9 wherein a coupling is provided on said shaft and is connected to the output shaft of said reversible motor.