electronic digital thermostat

electronic digital thermostat

electronic digital 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 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.

Prior art thermostats for such systems have the capability of adjusting the temperature set point for the room or other enclosed area which the thermostats are intended to control, and the thermostats normally operate to provide a controlled pressure in a pneumatic line which is connected to control elements such as dampers, valves and the like and such thermostats operate to admit increased pressure from a pneumatic supply line for the purpose of increasing the temperature and to decrease the pressure in the control line when the temperature is to be reduced. It should be understood by those of ordinary skill in the art that the system can be reverse acting, in that decreasing the pressure can increase the controlled temperature.

The controlled pneumatic pressure typically adjusts the position of the valves, dampers and the like to regulate the temperature in the controlled area. Additionally, there are many buildings which are controlled by pneumatic thermostats which control the operation of unit ventilators, such as are often used in schools. Such unit ventilators are typically stand-alone units and have a fan for circulating air, a heating coil through which steam or hot water may circulate with the amount of flow therethrough being regulated by a valve. While such mechanical pneumatic thermostats adequately control the temperature in the area which they are located, they are generally stand-alone units from a system standpoint, except for the capability of being switched between day/night operation by changing the pressure in the supply pneumatic lines, as is well known in the art.

One major disadvantage of such pneumatic control is the inability to have overall system operation whereby energy conservation schemes can be effectively utilized to reduce costs. Moreover, there is the inability to change temperature set points on a system-wide basis of the individual control of thermostats, among other desirable features that are present in automated supervisory control systems that are now generally used in new construction.

POST COMMENT

Electronic Medical Billing As A Form Of Data Entry Employment Safety Vests Habitually Preserve Lives 2009 China International Food Safety and Quality Control Conference and Exhibition - Food Safety, Food Quality - Food Industry Safety Violations Uncovered at Grain Facilities 3D projection reflects the trend of radio and television show real feeling overwhelmed crowd-3D, pro To Teach Electro Acoustic Guitar - The Attributes You Will Want To Possess A Widespread, But Major Personal Security Method, Safety Vests Are Underestimated 3 Important Exercise Elements for Increased Safety and Performance Berkeley RISC - China radio controlled digital watch - China womens digital watches Industrial Safety Supplies Amazing Blue fell to 1,299 yuan Guanghua recorded BDP1001 - Blu-ray player - radio and television ne Electronic timers are very important Essential PIM - Free Electronic Organiser