Control of temperature

GPHYSICS G05Controlling systems G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

G05D23/00Control of temperature

G05D23/01without auxiliary power G05D23/015with mechanical sensing element not covered by groups G05D23/02 and G05D23/12 G05D23/02with sensing element expanding and contracting in response to changes of temperature G05D23/021the sensing element being a non-metallic solid G05D23/022the sensing element being placed within a regulating fluid flow G05D23/023the sensing element being placed outside a regulating fluid flow G05D23/024the sensing element being of the rod type, tube type, or of a similar type G05D23/025the sensing element being placed within a regulating fluid flow G05D23/026the sensing element being placed outside a regulating fluid flow G05D23/027for combustible fluid G05D23/028with fusing sensing element G05D23/08with bimetallic element G05D23/10with snap-action elements G05D23/12with sensing element responsive to pressure or volume changes in a confined fluid G05D23/121characterised by the sensing element G05D23/122using a plurality of sensing elements G05D23/123the sensing element being placed within a regulating fluid flow G05D23/125the sensing element being placed outside a regulating fluid flow G05D23/126using a capillary tube G05D23/127to control a gaseous fluid circulation G05D23/128the fluid being combustible G05D23/13by varying the mixing ratio of two fluids having different temperatures G05D23/1306for liquids G05D23/1313without temperature sensing element G05D23/132with temperature sensing element G05D23/1326details of the sensor G05D23/1333measuring the temperature of incoming fluid G05D23/134measuring the temperature of mixed fluid G05D23/1346with manual temperature setting means G05D23/1353combined with flow controlling means G05D23/136with pressure equalizing means G05D23/1366using a plurality of sensing elements G05D23/1373measuring the temperature of mixed fluid G05D23/138for gases G05D23/1386for steam and liquid G05D23/1393characterised by the use of electric means G05D23/185with auxiliary non-electric power G05D23/1852with sensing element expanding and contracting in response to change of temperature G05D23/1854with bimetallic element G05D23/1856with sensing element responsive to pressure or volume change in a confined fluid G05D23/1858by varying the mixing ratio of fluids having different temperatures G05D23/19characterised by the use of electric means G05D23/1902characterised by the use of a variable reference value G05D23/1904variable in time G05D23/1905associated with tele control G05D23/1906using an analogue comparing device G05D23/1909whose output amplitude can only take two discrete values G05D23/1912whose output amplitude can take more than two discrete values G05D23/1913delivering a series of pulses G05D23/1917using digital means G05D23/1919characterised by the type of controller G05D23/192using a modification of the thermal impedance between a source and the load G05D23/1921using a thermal motor G05D23/1923using thermal energy, the cost of which varies in function of time G05D23/1924using thermal energy, the availability of which is aleatory G05D23/1925using a combination of auxiliary electric and non-electric power G05D23/1927using a plurality of sensors G05D23/1928sensing the temperature of one space G05D23/193sensing the temperaure in different places in thermal relationship with one or more spaces G05D23/1931to control the temperature of one space G05D23/1932to control the temperature of a plurality of spaces G05D23/1934each space being provided with one sensor acting on one or more control means G05D23/1935using sequential control G05D23/1951with control of the working time of a temperature controlling device G05D23/20with sensing elements having variation of electric or magnetic properties with change of temperature G05D23/2033details of the sensing element G05D23/2034the sensing element being a semiconductor G05D23/2035the sensing element being a ionized gas G05D23/2036the sensing element being a dielectric of a capacitor G05D23/2037details of the regulator G05D23/2039using mechanical means G05D23/22the sensing element being a thermocouple G05D23/2236details of the regulator G05D23/2237using discharge tubes G05D23/2239using photoelectric elements G05D23/224using selfs or transformers G05D23/24the sensing element having a resistance varying with temperature G05D23/2401using a heating element as a sensing element G05D23/2451Details of the regulator G05D23/2453using discharge tubes G05D23/2454using photoelectric elements G05D23/2456using selfs or transformers G05D23/26the sensing element having a permeability varying with temperature G05D23/27with sensing element responsive to radiation G05D23/275with sensing element expanding, contracting, or fusing in response to changes of temperature G05D23/27535Details of the sensing element G05D23/27536using fusible material G05D23/27537using expansible fluid G05D23/27539using conductible expansible fluid G05D23/2754using bimetallic element G05D23/27541using expansible solid G05D23/27543using the controlled element as sensing element G05D23/30Automatic controllers with an auxiliary heating device affecting the sensing element G05D23/303using a sensing element having a resistance varying with temperature G05D23/306using semiconductor devices G05D23/32with provision for adjustment of the effect of the auxiliary heating device