Wireless air conditioning control system

• US 5,927,599 A
• Filed: 03/12/1997
• Issued: 07/27/1999
• Est. Priority Date: 03/12/1997
• Status: Expired due to Term

• Current Assignee: Marley Engineered Products LLC (SPX Corporation)
• Original Assignee: Marley Electric Heating (SPX Corporation)
• Inventors: Kath, Miles E.
• Primary Examiner(s): WAYNER, WILLIAM E
• Application Number:
  US08/816,458
• Time in Patent Office: 867 Days
• Field of Search: 236/51, 236/47, 236/46 R, 165/205-230
• US Class Current: 236/47
• 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 11/56 Remote control
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: G05D 23/1905 associated with tele control

Abstract

A wireless air conditioning control system is provided. A thermostat assembly measures ambient temperature in an area to which an air conditioning system provides conditioned air. It compares the measured ambient temperature with a predetermined target temperature and wirelessly transmits air conditioning request signals to an air conditioning control assembly responsively to the comparison. The thermostat assembly and the air conditioning control assembly may be automatically mated with one another so that the air conditioning control assembly responds to air conditioning request signals only from a particular thermostat assembly. Where a plurality of transmitters are present, their transmissions are staggered to avoid data collision. The control assembly includes a freeze protection mechanism to protect against freezing conditions in the absence of air conditioning request signals. A battery powered thermostat assembly is intermittently partially shut down to reduce power consumption. The transmitter assembly predicts temperature to account for thermal inertia.

Claims

1. A wireless air conditioning control system, said system comprising:

a thermostat assembly configured to measure ambient temperature in an area to which an air conditioning system provides conditioned air, to compare measured ambient temperature with a predetermined target temperature, to wirelessly transmit identification signals, and to wirelessly transmit air conditioning request signals responsively to the comparison between said measured temperature and said target temperature, said air conditioning request signals and said identifying signals corresponding to a particular said thermostat assembly for use in a said area; and

an air conditioning control assembly configured to receive said air conditioning request signals and to control operation of said air conditioning system responsively to said air conditioning request signals, said air conditioning control assembly also being configured in a learn mode of operation to receive a said identifying signal to identify a said thermostat assembly and to thereafter, in an operational mode of operation, control operation of said air conditioning system responsively to said air conditioning request signals received only from said thermostat assembly identified by said identifying signal received during said learn mode.

2. The wireless air conditioning control system as in claim 1, wherein said air conditioning request signal and said identifying signal each include a serial number corresponding to the said thermostat assembly that transmits said identifying signal and said air conditioning request signal.

3. The wireless air conditioning control system as in claim 1, wherein said thermostat assembly is further configured to transmit a said identifying signal in response to a predetermined command by an operator.

4. The wireless air conditioning control system as in claim 1, wherein said thermostat assembly is configured to compare said measured temperature with said target temperature and to transmit a said air conditioning request signal when said measured temperature is below said target temperature, and wherein said control assembly is configured to control, upon receipt of a said air conditioning request signal, a said air conditioning system to provide heated air to said area.

5. The wireless air conditioning control system as in claim 1, wherein said thermostat assembly comprises a portable unit contained within a housing, and wherein said thermostat assembly includes at least one battery providing electricity to said thermostat assembly.

6. A wireless air conditioning control system, said system comprising:

a thermostat assembly including a temperature sensing mechanism configured to measure ambient temperature in an area, a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and a first control mechanism in operative communication with said temperature sensing mechanism and said transmitting mechanism, said first control mechanism configured to compare the ambient temperature measured by said temperature sensing mechanism with a predetermined target temperature, to transmit identifying signals via said transmitting mechanism, and to transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature, said identifying signals and said air conditioning request signals corresponding to a particular said thermostat assembly for use in a said area;

an air conditioning system in communication with said area and configured to provide conditioned air to said area; and

an air conditioning control assembly including a receiver mechanism configured to receive said identifying signals and said air conditioning request signals from said thermostat assembly and a second control mechanism in operative communication with said receiver mechanism and said air conditioning system and configured to control operation of said air conditioning system responsively to said air conditioning request signals, said second control mechanism being configured in a learn mode of operation to identify a said thermostat assembly in response to a said identification signal received by said receiver mechanism from said thermostat assembly and to thereafter, in an operational mode of operation, control operation of said air conditioning system responsively to said air conditioning request signals received only from said thermostat assembly identified by said identifying signal received during said learn mode.

7. The wireless air conditioning control system as in claim 6, wherein said temperature sensing mechanism includes a thermistor device.

8. The wireless air conditioning control system as in claim 6, wherein said identifying signals and said air conditioning request signals each include a serial number corresponding to the said thermostat assembly that transmits said identifying signals and said air conditioning request signals and wherein said second control mechanism is configured in said learn mode to identify a said thermostat assembly in response to a said identifying signal received by said receiver mechanism and to thereafter, in said operational mode, control operation of said air conditioning system responsively to said air conditioning request signals received only from said thermostat assembly identified by said identifying signal received during said learn mode.

9. The wireless air conditioning control system as in claim 8, wherein said serial number is a binary coded number.

10. The wireless air conditioning control system as in claim 6, wherein said thermostat assembly includes an input mechanism in operative communication with said first control mechanism whereby said target temperature is input by an operator to said first control mechanism via said input mechanism, said first control mechanism being further configured to transmit a said identifying signal in response to a command input by an operator via said input mechanism.

11. The wireless air conditioning control system as in claim 10, wherein said first control mechanism is configured to periodically transmit, via said transmitting mechanism, said identifying signals upon receipt of said command.

12. The wireless air conditioning control system as in claim 10, wherein said command includes setting said target temperature to a predetermined value.

13. The wireless air conditioning control system as in claim 6, wherein said control assembly includes an input mechanism in operative communication with said second control mechanism and wherein said learn mode is initiated by a command from an operator to said second control mechanism via said input mechanism.

14. The wireless air conditioning control system as in claim 6, wherein said thermostat assembly includes a light sensing mechanism in operative communication with said first control mechanism and wherein said first control mechanism is configured to compare said measured temperature with a second predetermined target temperature when said light sensing mechanism detects a predetermined light level and to transmit said air conditioning request signals responsively to the comparison between said measured temperature and said second predetermined target temperature.

15. A wireless air conditioning control system, said system comprising:

a thermostat assembly including

a temperature sensing mechanism configured to measure ambient temperature in an area,

a first input mechanism,

a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and

a first control mechanism in operative communication with said first input mechanism and said temperature sensing mechanism, said first control mechanism being configured to compare the ambient temperature measured by said temperature sensing mechanism with a target temperature input to said first control mechanism by a user via said input mechanism, to transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature, and to transmit identifying signals via said transmitting mechanism, said air conditioning request signals and said identifying signals corresponding to a particular said thermostat assembly for use in a said area, said first control mechanism being further configured to transmit a said air identifying signal via said transmitting mechanism in response to a predetermined command input by an operator via said input mechanism;

an air conditioning system in operative communication with said area and configured to provide conditioned air to said area; and

an air conditioning control assembly including

a receiver mechanism configured to receive said identifying signals and said air conditioning request signals from said thermostat assembly,

a second input mechanism, and

a second control mechanism in operative communication with said receiver mechanism and said second input mechanism and configured to control operation of said air conditioning system responsively to said air conditioning request signals, said second control mechanism being configured, in a learn mode of operation initiated by a command received by a user via said second input mechanism, to identify a said thermostat assembly by a said identifying signal received by said receiver mechanism and to thereafter, in an operational mode of operation, control operation of said air conditioning system responsively to said air conditioning request signals received only from said thermostat assembly identified by said identifying signal received during said learn mode.

16. The wireless air conditioning control system as in claim 15, wherein said identifying signals and said air conditioning request signals each include a binary coded serial number corresponding to the said thermostat assembly that transmits said identifying signals and said air conditioning request signals.

17. A wireless air conditioning control system, said system comprising:

a thermostat assembly, said thermostat assembly configured to measure ambient temperature in an area to which an air conditioning system provides conditioned air, to compare measured ambient temperature with a predetermined target temperature, and to intermittently wirelessly transmit air conditioning request signals responsively to the comparison between said measured temperature and said target temperature, wherein transmissions by said thermostat assembly are staggered with respect to transmissions of air conditioning request signals from other said thermostat assemblies to avoid data collision during said transmissions; and

at least one air conditioning control assembly configured to receive said air conditioning request signals from said thermostat assembly and to control operation of said air conditioning system responsively to said received air conditioning request signals.

18. The wireless air conditioning control system as in claim 17, including a plurality of said thermostat assemblies and wherein each said thermostat assembly is configured to store a serial number unique to said thermostat assembly among said plurality of thermostat assemblies and to intermittently transmit said air conditioning request signals, the interval between said intermittent transmissions being dependent upon said serial number.

19. A wireless air conditioning control system, said system comprising:

a plurality of thermostat assemblies, each said thermostat assembly including

a temperature sensing mechanism configured to measure ambient temperature in an area,

a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and

a first control mechanism in operative communication with said temperature sensing mechanism and said transmitting mechanism, said first control mechanism configured to compare the ambient temperature measured by said temperature sensing mechanism with a predetermined target temperature and to periodically transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature, wherein said first control mechanism is configured to store a serial number unique to its said thermostat assembly among said plurality of thermostat assemblies and wherein the length of the periodic interval of said transmissions is dependent upon said serial number;

an air conditioning system configured to provide conditioned air to at least one said area; and

an air conditioning control assembly, said air conditioning control assembly including

a receiver mechanism configured to receive signals wirelessly transmitted from a said thermostat assembly, and

a second control mechanism in operative communication with said receiver mechanism and said air conditioning system, said second control mechanism configured to control operation of said air conditioning system responsively to said air conditioning request signals.

20. A wireless air conditioning control system, said system comprising:

a thermostat assembly configured to measure ambient temperature in an area to which an air conditioning system provides conditioned air, to compare measured ambient temperature with a predetermined target temperature, and to wirelessly transmit air conditioning request signals responsively to the comparison between said measured temperature lo and said target temperature, said air conditioning request signals corresponding to a particular said thermostat assembly for use in a said area; and

an air conditioning control assembly configured to receive said air conditioning request signals and to control operation of said air conditioning system responsively to said air conditioning request signals, said air conditioning control assembly also being configured to measure ambient temperature about said air conditioning control assembly, to compare the measured ambient temperature about said air conditioning control assembly with a predetermined minimum desired temperature, and to control operation of said air conditioning system, regardless of said air conditioning request signals, to provide heated air to said area responsively to the comparison with said predetermined minimum desired temperature.

21. A wireless air conditioning control system, said system comprising:

a thermostat assembly, said thermostat assembly including

a first temperature sensing mechanism configured to measure ambient temperature in an area,

a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and

a first control mechanism in operative communication with said first temperature sensing mechanism and said transmitting mechanism, said first control mechanism configured to compare the ambient temperature measured by said first temperature sensing mechanism with a predetermined target temperature and to transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature;

an air conditioning system in communication with said area and configured to provide conditioned air to said area; and

an air conditioning control assembly, said air conditioning control assembly including

a second temperature sensing mechanism configured to measure ambient temperature about said air conditioning control assembly,

a receiver mechanism configured to receive said air conditioning request signals, and

a second control mechanism in operative communication with said receiver mechanism, said second temperature sensing mechanism and said air conditioning system, said second control mechanism being configured to control operation of said air conditioning system responsively to said air conditioning request signals, to compare the ambient temperature measured by said second temperature sensing mechanism with a predetermined minimum desired temperature, and to control operation of said air conditioning system, regardless of said air conditioning request signals, to provide heated air to said area responsively to the comparison with said predetermined minimum desired temperature.

22. The wireless air conditioning control system as in claim 21, wherein said thermostat assembly includes an input mechanism in operative communication with said first control mechanism whereby said target temperature is input by an operator to said first control mechanism via said input mechanism and wherein said first control mechanism is configured to intermittently reduce electric current drawn from said electricity source to said thermostat assembly during a period of time while said temperature sensing mechanism, said transmitting mechanism, and said input mechanism are inactive.

23. A wireless air conditioning control system, said system comprising:

a thermostat assembly configured to measure ambient temperature in an area to which an air conditioning system provides conditioned air, to compare measured ambient temperature with a predetermined target temperature, and to wirelessly transmit air conditioning request signals responsively to the comparison between said measured temperature and said target temperature; and

an air conditioning control assembly configured to receive said air conditioning request signals and to control operation of said air conditioning system responsively to said air conditioning request signals so that conditioned air is supplied to said area when said measured temperature differs from said target temperature by more than a predetermined amount,

wherein said thermostat assembly is also configured

to store ambient temperature data corresponding to said measurements made over a predetermined period of time prior to the most recent said measurement,

to predict ambient temperature at a predetermined time following said most recent measurement based on said stored ambient temperature data, and

to control transmission of said air conditioning request signals to said air conditioning control assembly when said predicted ambient temperature equals or is beyond said target temperature with respect to said most recent measurement so that supply of said conditioned air to said area is ceased.

24. A wireless air conditioning control system, said system comprising:

a thermostat assembly, said thermostat assembly including

a temperature sensing mechanism configured to measure ambient temperature in an area,

a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and

a first control mechanism in operative communication with said temperature sensing mechanism and said transmitting mechanism, said first control mechanism configured to periodically measure said ambient temperature via said temperature sensing mechanism, to compare measured ambient temperature with a predetermined target temperature and to transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature;

an air conditioning system in communication with said area and configured to provide conditioned air to said area; and

an air conditioning control assembly, said air conditioning control assembly including

a receiver mechanism configured to receive said air conditioning request signals, and

a second control mechanism in operative communication with said receiver mechanism and said air conditioning system, said second control mechanism configured to control operation of said air conditioning system responsively to said air conditioning request signals so that said air conditioning system supplies conditioned air to said area when said measured temperature differs from said target temperature by more than a predetermined amount,

wherein said first control mechanism is configured

to store ambient temperature data corresponding to a predetermined number of said periodic measurements made prior to the most recent measurement,

to predict ambient temperature at a predetermined time following said most recent measurement based on said stored ambient temperature data, and

to control transmission of said air conditioning request signals to said air conditioning control assembly when said predicted ambient temperature equals or is beyond said target temperature with respect to said most recent measurement so that said air conditioning system ceases supplying said conditioned air to said area.

25. A wireless air conditioning control system as in claim 24, wherein the length of said predetermined time is equal to the period of said periodic measurements.

26. A wireless air conditioning control system, said system comprising:

a source of electricity;

a thermostat assembly, said thermostat assembly powered by said electricity source and including

a first temperature sensing mechanism configured to measure ambient temperature in an area,

a first input mechanism,

a transmitting mechanism configured to wirelessly transmit signals from said thermostat assembly, and

a first control mechanism in operative communication with said first input mechanism and said first temperature sensing mechanism, said first control mechanism being configured to compare the ambient temperature measured by said first temperature sensing mechanism with a target temperature input to said first control mechanism by a user via said input mechanism, to intermittently transmit air conditioning request signals via said transmitting mechanism responsively to the comparison between said measured temperature and said target temperature, to transmit identifying signals via said transmitting mechanism, and to intermittently reduce electric current drawn from said electricity source to said thermostat assembly, wherein

said air conditioning request signals and said identifying signals correspond to a particular said thermostat assembly for use in a said area,

said first control mechanism is further configured to transmit a said air identifying signal via said transmitting mechanism in response to a predetermined command input by an operator via said input mechanism,

said intermittent transmissions by said first control mechanism are staggered with respect to transmissions of air conditioning request signals from other said thermostat assemblies to avoid data collision during said transmissions, and

said first control mechanism is further configured to store ambient temperature data corresponding to said measurements made over a predetermined period of time prior to the most recent said measurement, to predict ambient temperature at a predetermined time following said most recent measurement based on said stored ambient temperature data, and to transmit said air conditioning request signals responsively to said prediction;

an air conditioning system in communication with said area and configured to provide conditioned air to said area; and

an air conditioning control assembly including

a second temperature sensing mechanism configured to measure ambient temperature about said air conditioning control assembly;

a receiver mechanism configured to receive said identifying signals and said air conditioning request signals from said thermostat assembly,

a second input mechanism, and

a second control mechanism in operative communication with said receiver mechanism and said second temperature sensing mechanism, said second control mechanism being configured to control operation of said air conditioning system responsively to said air conditioning request signals, said second control mechanism being configured, in a learn mode of operation initiated by a command received by a user via said second input mechanism, to identify a said thermostat assembly by a said identifying signal received by said receiver mechanism and to thereafter, in an operational mode of operation, control operation of said air conditioning system responsively to said air conditioning request signals received only from said thermostat assembly identified by said identifying signal received during said learn mode, said second control mechanism also being configured in said operational mode to compare the ambient temperature measured by said second temperature sensing mechanism with a predetermined minimum desired temperature and to control operation of said air conditioning system, regardless of said air conditioning request signals, to provide heated air to said area responsively to the comparison with said predetermined minimum desired temperature.

27. A wireless air conditioning control system, said system comprising:

means for measuring ambient temperature in an area to which an air conditioning system provides conditioned air, for comparing measured ambient temperature with a predetermined target temperature, for wirelessly transmitting identification signals, and for wirelessly transmitting air conditioning request signals responsively to the comparison between said measured temperature and said target temperature, said air conditioning request signals and said identifying signals corresponding to a particular said measuring means for use in a said area; and

means for receiving said air conditioning request signals, for controlling operation of said air conditioning system responsively to said air conditioning request signals, for receiving, in a learn made of operation, a said identifying signal to identify a said measuring means, and for thereafter, in an operational made of operation, controlling operation of said air conditioning system responsively to said air conditioning request signals received only from said measuring means identified by said identifying signal received during said learn made.