Thermostat speed bar graph for variable speed temperature control system

• US 5,005,365 A
• Filed: 12/02/1988
• Issued: 04/09/1991
• Est. Priority Date: 12/02/1988
• Status: Expired due to Fees

• Current Assignee: International Comfort Products Corp. (Carrier Global Corporation)
• Original Assignee: Inter-City Products Corporation
• Inventors: Lynch, Gregory A.
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US07/278,789
• Time in Patent Office: 858 Days
• Field of Search: 62/126, 62/127, 62/228.4, 62/226, 236/94, 417/63, 165/11.1, 361/236, 361/239, 361/22
• US Class Current: 62/126
• CPC Class Codes: G05D 23/1917 using digital means

Abstract

A thermostat for a variable speed temperature control system. The thermostat has a processor for determining a utilization ratio to drive the temperature control system. The processor also drives a display which graphically exhibits the utilization ratio.

Claims

1. A variable speed temperature control system, having a thermostat for selecting a desired ambient temperature to be maintained by said variable speed temperature control system, said system having a predetermined available capacity, said system comprising:

a prime mover to maintaining the desired temperature, said prime mover adapted to continuously operate at an operating speed within a predetermined speed range whereby the utilized capacity of said temperature control system is a function of the operating speed of said prime mover and the available capacity of said system;

means for determining the operating speed of said prime mover of said temperature control system to maintain a selected ambient temperature, said speed determining means calculating a utilization ratio as a function of the determined operating speed of said prime mover and the available capacity of said temperature control system;

display means, coupled to said speed determining means, for graphically displaying said determined operating speed.

2. The thermostat claimed in claim 1 wherein said display means comprises a liquid crystal display (LCD).

3. The thermostat claimed in claim 1 wherein said display means comprises a plurality of light emitting diodes (LEDs).

4. The thermostat claimed in claim 1 wherein said speed determining means comprises a control means, said control means including a communication means for transmitting speed indicating signals corresponding to said determined operating speed to said display means.

5. The thermostat claimed in claim 1 further including a RAM to store a graphic representation of said utilization ratio.

6. The thermostat claimed in claim 1 wherein said display means includes ten display elements such that said display means is adapted to display said utilization ratio with each display element representing a ten percent increment.

7. A variable speed temperature control system, having a thermostat for selecting a desired ambient temperature to be maintained by said variable speed temperature control system, said system having a predetermined available capacity, said system comprising:

a prime mover for maintaining the desired temperature, said prime mover adapted to continuously operate at an operating speed within a predetermined speed range whereby the utilized capacity of said temperature control system is a function of the operating speed of said prime mover and the available capacity of said system;

control means for determining the operating speed of said prime mover of said temperature control system, said control means including display driver means for storing a graphic representation of said determined speed and including a random access memory;

display means for graphically displaying said determined operating speed, said control means drivingly coupled to said display means for driving said display means.

8. The thermostat claimed in claim 7 wherein said display means comprises a liquid crystal display LCD).

9. The thermostat claimed in claim 8 wherein said display means comprises a plurality of light emitting diodes (LEDs).

10. The thermostat claimed in claim 7 wherein said control means calculates a utilization ratio which is a function of said predetermined speed and the capacity of said temperature control system.

11. The thermostat claimed in claim 10 wherein said display means includes ten display elements such that said display means is adapted to display said utilization ratio with each display element representing a ten percent increment.

12. In a variable speed temperature control system having a predetermined available capacity and including a prime mover for maintaining a desired temperature, the prime mover adapted to continuously operate at an operating speed within a predetermined range whereby the utilized capacity of the temperature control system is a function of the operating speed of the prime mover and the available capacity of the system, a thermostat for selecting a desired ambient temperature to be controlled by the variable speed temperature control system, said thermostat including processor means, coupled to the temperature control system prime mover, for determining the determined operating speed of the temperature control system, said processor means calculating a utilization ratio for determining said determined operating speed for said system, said utilization ratio being a function of said determined speed and the available capacity of said temperature control system.

13. The thermostat claimed in claim 12 wherein said display means comprises a liquid crystal display (LCD).

14. The thermostat claimed in claim 12 wherein said display means comprises a plurality of light emitting diodes (LEDs).

15. The thermostat claimed in claim 12 wherein said processor produces determined operating speed indicating signals, said processor further comprising a communication means for transmitting said determined operating speed indicating signals to said display means.

16. The thermostat claimed in claim 12 further comprising a random access memory (RAM) for storing a graphic representation of said utilization ratio.

17. The thermostat claimed in claim 12 wherein said display means includes ten display elements whereby said display means is adapted to display said utilization ratio with each display element representing an increment of ten percent.

18. In a variable speed temperature control system having a predetermined available capacity and including a prime mover for maintaining a desired temperature, the prime mover adapted to continuously operate at an operating speed within a predetermined speed range whereby the utilized capacity of the temperature control system is a function of the operating speed of the prime mover and the available capacity of the system, a thermostat for selecting a desired ambient temperature to be maintained by the variable speed temperature system, said thermostat comprising:

means for determining the operating speed of the prime mover of the temperature control system, said speed determining means producing speed signals indicative of said determined operating speed, said speed determining means calculating a utilization ratio for determining said determined operating speed for said system, said utilization ratio being a function of said determined speed and the available capacity of said temperature control system;

display means coupled to said speed determining means for graphically displaying said determined operating speed;

said speed determining means including communication means for transmitting said speed signals to said display means; and

said communication means further connected to the prime mover of the temperature control system, said communication means operative to produce control signals indicative of the operating speed of the prime mover and for transmitting said control signals to said speed determining means.