Electronic Digital
Electronic Digital
Direct Digital Control Thermostat
Direct digital control thermostat
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 room 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.
The present invention is directed to an electronic digital thermostat 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. For example, pressure within pneumatic control lines may vary to adjust the position of dampers, control valves or the like which control the volume of steam, air and water to heating coils, radiators or the like, or in the case of dampers, controlling the amount of air that is forced into the space that is being controlled.
Such systems generally have been controlled by a floor heating thermostat that is essentially mechanical in nature and wherein adjustment of the set point for the desired temperature has been performed by manual manipulation and except for the capability of providing day/night modes of operation, very little control is possible through the thermostat. The present invention is intended to be operable with such a pneumatic control system and is capable of standalone operation or with an integrated supervisory and control system if desired. Because of its superior design, it is capable of being merely substituted for a prior pneumatic digital thermostat without any other alterations or modifications to the control elements or the heating apparatus.
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