Controller for an air conditioning or heating system

• US 4,288,990 A
• Filed: 03/12/1980
• Issued: 09/15/1981
• Est. Priority Date: 04/16/1979
• Status: Expired due to Term

• Current Assignee: Daniel R. Schulz
• Original Assignee: Daniel R. Schulz
• Inventors: Schulz, Daniel R.
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US06/129,690
• Time in Patent Office: 552 Days
• Field of Search: 236/46, 307/39, 165/12, 165/11, 361/22, 361/23, 62/158
• US Class Current: 62/158
• 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 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/61 using timers
• CPC Class Codes: F24F 11/86 by controlling compressors within refrigeration or heat pump circuits
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: F24F 2110/10 Temperature
• 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

An apparatus is disclosed for activating a thermostat for an air conditioning or heating system. The apparatus comprises a control circuit and a controllable switch connected to activate and deactivate the thermostat controlling the air conditioning or heating system. A timing circuit provides a first timing period in which the thermostat is deactivated in addition to providing a second timing period to activate the thermostat. The control also includes a circuit for deactivating the thermostat for a period of time in the event the compressor terminates operation for any reason. An optional occupancy sensor increases the time of deactivation of the thermostat during periods of non-use of the area being air conditioned or heated. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Claims

1. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

thermostat line sensor means for sensing the condition of said controllable switch means and the thermostat to reset said timing circuit to said first timing period upon termination of power to the air conditioning or heating system;

power source sensor means for sensing the level of available power from the power source to reset said timing circuit to said first timing period upon a reduction in the level of the power source below a preselected minimum power level.

2. An apparatus as set forth in claim 1, wherein said power source sensor means comprises a capacitor for storing a charge in accordance with the power level of the power source;

and

means for comparing the voltage on said capacitor to a preestablished voltage standard.

3. An apparatus as set forth in claim 1, wherein said power source sensor means continuously resets said timing circuit to said first timing period until the power source returns to said preselected minimum power level.

4. An apparatus as set forth in claim 1, wherein the thermostat controls a power switch interconnecting the power source and the air conditioning or heating system;

and

said controllable switch means being connected in electrical series with the thermostat.

5. An apparatus as set forth in claim 4, wherein said thermostat line sensor means includes a voltage sensor connected to said controllable switch means;

and

a monostable device connected to said voltage sensor for resetting said timing circuit.

6. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

said timing circuit includes a counter for counting at least a portion of the cycles of an alternating current power source;

said timing circuit includes a divider circuit for providing a divider circuit output upon said divider circuit counting a preselected number of input pulses;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

thermostat line sensor means for sensing the condition of said controllable switch means and the thermostat to reset said timing circuit to said first timing period upon termination of power to the air conditioning or heating system; and

power source sensor means for sensing the level of available power from the power source to reset said timing circuit to said first timing period upon a reduction in the level of the power source below a preselected minimum power level.

7. An apparatus as set forth in claim 6, wherein said timing circuit includes a wave shaper for modifying the alternating current waveform for counting by said counter.

8. An apparatus as set forth in claim 6, wherein said counter provides said first output while counting a first number of input pulses and providing said second output upon counting said first number of input pulses;

and

said counter providing said second output while counting a second number of input pulses and providing said first output upon counting said second number of input pulses.

9. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from an alternating current power source to the air conditioning or heating system, comprising in combination:

a divider circuit for providing a divider circuit output upon said divider circuit counting a preselected number of input signals from the alternating current power source;

a counter for counting the output signals of said divider circuit for providing a first output while counting a first number of signals and alternately providing a second output while counting a second number of signals;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

presence sensor for sensing the presence of acoustic emission within the area being air conditioned or heated; and

means connecting the output of said presence sensor to said controllable switch means for deactivating said thermostat during a portion of said second timing period upon said presence sensor detecting the absence of acoustical emission within the area being air conditioned or heated.

10. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

presence sensor for sensing the presence of acoustic emission within the area being air conditioned or heated; and

means connecting the output of said presence sensor to said controllable switch means for deactivating said thermostat during a portion of said second timing period upon said presence sensor detecting the absence of acoustical emission within the area being air conditioned or heated.

11. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

presence sensor for sensing the presence of acoustic emission within the area being air conditioned or heated;

means connecting the output of said presence sensor to said controllable switch means for deactivating said thermostat during a portion of said second timing period upon said presence sensor detecting the absence of acoustical emission within the area being air conditioned or heated;

said presence sensor includes an acoustic transducer disposed within the area being air conditioned or heated;

a filter network interconnecting said acoustic transducer to said controllable switch means for deactivating said thermostat during a portion of said timing period during an absence of signal passed by said filter; and

means connecting said presence sensor to said timing circuit for activating said controllable switch means during at least a portion of said second timing period irrespective of the output of said presence sensor.

12. An apparatus for activitating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said first output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

thermostat line sensor means for sensing the condition of said controllable switch means and the thermostat to reset said timing circuit to said first timing period upon termination of power to the air conditioning or heating system;

power source sensor means for sensing the level of available power from the power source to reset said timing circuit to said first timing period upon a reduction in the level of the power source below a preselected minimum power level;

presence sensor for sensing the presence of movement within the area being air conditioned or heated; and

means connecting the output of said presence sensor to said controllable switch means for deactivating the thermostat during at least a portion of said second timing period upon said presence sensor detecting an absence of movement within the area being air conditioned or heated.

13. An apparatus as set forth in claim 12, including means connecting said presence sensor to said timing circuit for activating said controllable switch means during at least a portion of said second timing period irrespective of the output of said presence sensor.

14. An apparatus as set forth in claim 12, including a second thermostat for deactivating said presence sensor upon said second thermostat sensing a temperature above a desired level.

15. An apparatus for activating a thermostat for an air conditioning or heating system, the thermostat controlling power from a power source to the air conditioning or heating system, comprising in combination:

a timing circuit providing a first output during a first timing period and a second output during a second timing period;

a controllable switch means connected to activate or deactivate the thermostat controlling of the air conditioning or heating system;

means for connecting said second output to said controllable switch means for deactivating the thermostat during said first timing period;

means for connecting said second output to said controllable switch means for activating said thermostat during said second timing period thereby enabling the thermostat to power the air conditioning or heating system;

thermostat line sensor means for sensing the condition of said controllable switch means and the thermostat to reset said timing circuit to said first timing period upon termination of power to the air conditioning or heating system;

power source sensor means for sensing the level of available power from the power source to reset said timing circuit to said first timing period upon a reduction in the level of the power source below a preselected minimum power level;

presence sensor for sensing the presence of movement within the area being air conditioned or heated;

means connecting the output of said presence sensor to said controllable switch means for deactivating the thermostat during at least a portion of said second timing period upon said sensor detecting and absence of movement within the area being air conditioned or heated;

said presence sensor includes an acoustic transducer for detecting acoustic output of movement within the area being air conditioned or heated; and

filter network interconnecting said acoustic transducer to said controllable swithc means.