Electromechanical thermostatic mixing valve

Details Electromechanical thermostatic mixing valve Electromechanical thermostatic mixing valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/64 (2006.01) F16K 11/04 (2006.01) G05D 23/13 (2006.01)

Patent

CA 2118690

32 ABSTRACT An electromechanically controlled thermostatic mixing valve (10) comprises a movable mixing valve member (114) resiliently held between a temperature responsive coiled spring (132) and a bias spring (134). The temperature responsive spring is made of a material such as a shape memory alloy (SMA) having a modulus of elasticity that varies with temperature. The bias spring is supported by an electric drive (46) controlled by an electric control circuit (32) to adjust the preload on the bias spring. In contrast to the bias spring which is subjected to deformation from its free state to its fully compressed state, the SMA spring is held in such a manner that it is subjected to a limited strain throughout the stroke of the valve member. As a result, premature fatigue of the SMA spring is avoided. Transient fluctuation in water temperature is primarily compensated for by a mechanical feedback control performed by the SMA spring. Any persistent offset of temperature is compensated for by electrical feedback control carried out by the electrical control circuit that adjust the preload on the bias spring preload such that the actual water temperature is brought to the desired temperature.

Affiliated with

Also associated with

Rating

Electromechanical thermostatic mixing valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromechanical thermostatic mixing valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromechanical thermostatic mixing valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1961061