Direct digital control thermostat
AssigneeLandis & Staefa, Inc.
InventorsWilliam H. Gorski, Wayne S. Lauer, Amy L. Ikenn
Life of this patent
Estimating the term…
Abstract
An electronic digital thermostat is disclosed which is capable of use in a pneumatically controlled temperature control system of the type which has a pneumatic supply line which extends to various components of the control system and wherein the control elements of the system are controlled by varying the control pressure that is communicated to such elements. The thermostat is capable of operating in a LAN system environment, and can be retrofitted into unit ventilators and the like as a substitute for a conventional pneumatic thermostat. The thermostat has a processing means that enables sophisticated control to be achieved.
Claims39
An electronic digital thermostat adapted for use in a pneumatically controlled temperature control system of the type which has at least one pneumatic source line and at least one pneumatic output control line, the pressure in each output control line controlling the temperature of a particular indoor area, said thermostat being adapted to maintain a desired ambient temperature in at least one particular indoor area, said thermostat comprising:
- a housing for containing the various means of the thermostat, said housing having a compact overall size;
- means for determining and adjusting the temperature set point of the thermostat;
- valve means being adapted to be operatively connected to one pneumatic source line and to an exhaust and having a pneumatic output line, said valve means controlling the pressure in said pneumatic output line in response to electrical control signals being applied to said valve means, said controlled pressure being within the range defined by the pressures that exist in said source line and said exhaust;
- means for sensing the ambient temperature and generating an electrical signal that is indicative of the sensed temperature;
- means for sensing the pneumatic pressure in said pneumatic output line and generating an electrical signal that is indicative of the sensed pressure;
- processing means including memory means for storing instructions and data relating to the operation of the thermostat, said processing means being adapted to receive electrical signals that are indicative of sensed temperature and sensed pressure and said temperature set point, and to generate said electrical control signals for controlling said valve means;
- means operatively connected to said processing means for communicating with a remote controlling means;
- and,
- means for providing power for operating the thermostat.
A system for controlling a temperature control system for one or more indoor areas to maintain a desired ambient temperature in each such area, wherein said temperature control system is of the type which has at least one pneumatic source line and one or more pneumatic output control lines, the pressure in each output control line being thermostatically controlled to control the temperature of a particular indoor area, said system comprising:
- a remote controlling means and at least one electronic digital thermostat;
- said remote controlling means being adapted to communicate with a plurality of said individual thermostats, said remote controlling means including a central computing means adapted to provide instructions and data relating to the operation of said individual thermostats, and including memory means having instructions and data relating to the operation of said thermostat, said controlling means including means for communicating with said thermostats and for adjusting the operation of the same;
- each of said electronic digital thermostats further comprising:
- a housing for containing the various means of the thermostat, said housing having a compact overall size;
- valve means being adapted to be operatively connected to a pneumatic source line and to an exhaust and having a pneumatic output line, said valve means controlling the pressure in said pneumatic output line in response to electrical control signals being applied to said valve means, said controlled pressure being within the range defined by the pressures that exist in said source line and in said exhaust;
- means for sensing the ambient temperature and generating an electrical signal that is indicative of the sensed temperature;
- means for sensing the pneumatic pressure in said pneumatic output line and generating an electrical signal that is indicative of the sensed pressure;
- local processing means including memory means for storing instructions and data relating to the operation of the thermostat, said local processing means being adapted to receive said signals indicative of sensed temperature and sensed pressure and to generate said electrical control signals for controlling said valve means;
- means operatively connected to said local processing means for communicating with said remote controlling means;
- means operatively connected to said local processing means for determining and adjusting the temperature set point of the thermostat;
- and,
- means for providing power for operating each of said thermostats.
Dependencies are inferred from the claim text.