Find more ways to say thermostat, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. Energy Information Administration, ‘‘Residential energy consumption survey,’’ U.S. Dept. Electricity and magnetism IGCSE Physics. Operation of the supplemental heat is controlled by a second stage heating contact in the heat pump thermostat. Thus, if the controlled space has a temperature normally above the desired setting when the heating/cooling system is off, it would be wise to keep the thermostat set to "cool", despite what the temperature is outside. Electricity. It could consist of only a temperature sensor and a control switch. Medical Definition of thermostat (Entry 2 of 2), Nglish: Translation of thermostat for Spanish Speakers, Britannica.com: Encyclopedia article about thermostat. Similar mechanisms may also be used to control oil furnaces, boilers, boiler zone valves, electric attic fans, electric furnaces, electric baseboard heaters, and household appliances such as refrigerators, coffee pots and hair dryers. As illustrated in the use of the thermostat above, all of the power for the control system is provided by a thermopile which is a combination of many stacked thermocouples, heated by the pilot light. If the hallway may be closed by doors from the regulated spaces then these should be left open when the system is in use. Electromechanical thermostats use resistance elements as anticipators. There are no standards for wiring color codes, but convention has settled on the following terminal codes and colors. A thermostat is a type of circuit that shows whether a measured temperature is above or below a particular point, and is used for thermal protection and simple temperature control systems. Thermostats are used in any device or system that heats or cools to a setpoint temperature, examples include building heating, central heating, air conditioners, HVAC systems, water heaters, as well as kitchen equipment including ovens and refrigerators and medical and scientific incubators. Most electronic thermostats use either thermistor devices or integrated logic elements for the anticipation function. However, thermostatic radiator valves (TRV) are now being widely used. Each lesson includes informative graphics, occasional animations and videos, and Check Your Understanding sections that allow the user to practice what is taught. Upper fixed point. On the other hand, if the temperature of the controlled area falls below the desired degree, then it is advisable to turn the thermostat to "heat". This is the same as "COR" ("Close on Rise"). This is the same as "OOR" ("Open on Rise"). Modern thermostat control was developed in the 1830s by Andrew Ure (1778–1857), a Scottish chemist, who invented the bi-metallic thermostat. May be used to start a fan when it is becoming hot, but also (on the opposite terminal), to start a heater when it is becoming cold. SEE PREVIOUS WORDS. The unit has three heat levels, an adjustable, First, by letting the reasonable member of your household control the, Google is offering a range of great deals on its line of products, from $50 off its smart, The bungalow, built in 1908 on a 3,920-square-foot lot, has two bedrooms, one bathroom, a smart, Post the Definition of thermostat to Facebook, Share the Definition of thermostat on Twitter. n Thermostat (Physics) A device which automatically regulates temperature, or provides a signal used by another device to regulate temperature. This reduces the risk of equipment wear from too frequent switching, although it introduces a target system temperature oscillation of a certain magnitude. A thermostat, when set to "cool", will only turn on when the ambient temperature of the surrounding room is above the set temperature. Conceptual ideas develop logically and sequentially, ultimately leading into the mathematics of the topics. [3] This is one of the first recorded feedback-controlled devices. Thermistors act as a passive component in a circuit. The word thermostat is derived from the Greek words θερμός thermos, "hot" and στατός statos, "standing, stationary". In modern vehicles, the vacuum actuators may be operated by small solenoids under the control of a central computer. Although the thermostat may indicate the system is in defrost and electric heat is activated, the defrost function is not controlled by the thermostat. Wax pellet driven valves are used in anti scald, freeze protection, over-temp purge, solar thermal, automotive, and aerospace applications among many others. 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