Controller for environmental conditioning apparatus

• US 4,123,796 A
• Filed: 11/19/1976
• Issued: 10/31/1978
• Est. Priority Date: 11/19/1976
• Status: Expired due to Term

• Current Assignee: Powers Regulator Company (Watts Water Technologies Incorporated)
• Original Assignee: Powers Regulator Company (Watts Water Technologies Incorporated)
• Inventors: Shih, James Y.
• Primary Examiner(s): Shaw, Gareth D.
• Assistant Examiner(s): Bartz, C. T.
• Application Number:
  US05/743,110
• Time in Patent Office: 711 Days
• Field of Search: 364/900 MS File, 340/147 R, 340/163, 165/14, 165/22
• US Class Current: 700/278
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05D 23/20 with sensing elements having variation of electric or magnetic properties with change of temperature G05D23/13 takes precedence

Abstract

A controller is disclosed for use in controlling environmental conditioning apparatus such as heating and air conditioning equipment in a building or the like. The controller is flexible in that it can control most types of such control devices and apparatus and it eliminates the necessity of a conventional local controller while permitting the use of a centrally controlled automated system if such is desired. The controller is self-contained in that it preferably has a display and keyboard for establishing and changing the operational limits of the apparatus that is to be controlled. Only one sensing device is needed for each apparatus that is controlled, since the signals that are generated by the sensing devices are compatible with the controller as well as with a central automated system if such is used. The controller eliminates the need for a conventional local controller for each apparatus and permits one controller to be used in conjunction with a plurality or a group of control devices.

Claims

1. A system for monitoring and controlling a plurality of controlled apparatus which in turn control environmental and temperature parameters comprising:

control means for controlling said plurality of controlled apparatus having associated memory means containing stored information signals relating to the desired status of a parameter and the operating characteristics for each of said plurality of controlled apparatus, said control means being adapted to receive information signals from sensing means associated with each controlled apparatus, process said received information signals, including comparing the same with the stored parameter information signals and issue command signals in response to the stored and received information signals to all adjusting means operatively connected to each controlled apparatus;

sensing means adapted to measure the status of the parameter associated with each controlled apparatus and produce information signals indicative of the parameter;

a plurality of adjusting means, each being operably connected to a controlled apparatus for adjusting the same in response to receiving command signals from said control means;

said control means being further adapted to transmit an address signal for said command signals to every adjusting means; and

each of said plurality of adjusting means having a first comparison means for comparing said address signal with an internal address signal, signal means for providing signals indicating the status of said controlled apparatus, and second comparison means for comparing the status signals with the command signals in the event the two address signals identically compare whereby the controlled apparatus may be adjusted until the status of same compares with said command signal.

2. A system as defined in claim 1 wherein said control means is adapted to transmit command and address signals and receive information signals in serial form.

3. A system as defined in claim 2 wherein said adjusting means is adapted to receive command and address signals and transmit information signals in serial form.

4. A system as defined in claim 1 further comprising means for selectively displaying the stored information and the received information regarding the status of said parameters.

5. A system as defined in claim 4 wherein said display means comprises an automatic typewriter.

6. A system as defined in claim 4 wherein said display means comprises a cathode ray display tube.

7. A system as defined in claim 1 further including means for transmitting an identification signal that identifies the controlled apparatus from which information signals originate.

8. A system as defined in claim 1 further comprising means for entering and changing said stored information signals in said memory means for each of said controlled apparatus.

9. A system as defined in claim 8 wherein said entering means comprises a series of specific function keys and a numeric keyboard, said function keys being adapted to cause said control means to perform a specific series of instructions relating to the control of one of said controlled apparatus.

10. A system as defined in claim 8 wherein said entering means comprises an alpha-numeric keyboard.

11. A system as defined in claim 9 wherein said control means is adapted to follow predetermined algorithms located in said memory means, said algorithms being related to the operation of said controlled apparatus, said function keys of said entering means being adapted to address and selectively retrieve said algorithms to display information relating to the operation of certain apparatus, and for changing the values or operation of said apparatus.

12. A controller for controlling two or more devices that are used to regulate the temperature and environmental conditions in an air conditioning system;

said controller having processing and memory means associated therewith, said memory means being adapted to store preselected electrical information signals relating to the temperature, humidity and other parameters which the devices regulate, said processing means being adapted to compare information signals received from sensing means with said preselected information signals and issue command signals and address signals for adjusting said devices;

means for entering and changing said stored information signals within said memory means to thereby alter the temperature and humidity ranges which said devices regulate;

means for displaying said preselected and received information for each of said devices;

sensing means for measuring the temperature, humidity or the like and for providing electrical information signals indicative of the same to said processing means; and

means associated with said devices for adjusting the same in response to receiving said electrical command signals, said adjusting means having means for comparing said address signal with an internal address signal and responding to said command signal in the event the two address signals compare.

13. A controller as defined in claim 12 wherein said memory means has a number of sets of operating instructions stored therein as electrical signals, said processing means being adapted to retrieve said signals relating to said operating instructions and issue said electrical command signals which implement said operating instructions relating to the device being controlled.

14. A controller as defined in claim 13 wherein said entering and changing means comprises an alpha-numeric keyboard means.

15. A controller as defined in claim 13 wherein said entering and changing means is adapted to insert specific values relating to the operation of each controlled device and to change said values if desired.

16. A controller as defined in claim 13 wherein said entering and changing means comprises a series of specific operating function keys and a numeric keyboard, said function keys being adapted to cause said processing means to retrieve signals from said memory means for issuing a command for carrying out a specific set of instructions relating to the operation of one of said devices.

17. A controller as defined in claim 12 wherein said display means comprises means for printing information relating to the operation of a device.

18. A controller as defined in claim 12 wherein said display means comprises a cathode ray tube.