F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
341/2, 347/9
F25D 29/00 (2006.01) F25B 49/00 (2006.01) F25D 21/02 (2006.01) F28F 17/00 (2006.01) H05K 5/00 (2006.01)
Patent
CA 1303701
ABSTRACT A method and apparatus for adjustably controlling the growth of the solid phase of a substance from around a cooling mechanism, such as the growth of an ice bank around cooling coils, while also minimizing chances of inaccurate control by referencing the apparent resistance of the liquid that is actually in the system rather than a standard value for the same. The invention uses four springs as probes that are positioned relative to one another and are linked with a detachable control circuit in a manner which provides a dead-band in the unit's operation by monitoring the resistance of the liquid at two different distances from the cooling mechanism while the reference resistance is monitored at an even greater distance. A mounting means for the probes advantageously positions the probes relative to cooling coils but allows for adjustment of the size of an ice bank formed around those coils while also protecting the probes and their electrical connections, and a detachable housing for a printed control circuit board is also provided with other advantageous features such as environmental protection.
583663
Chesnut Milton Lloyd
Ewing Lenord G.
Norman Richard O.
Schroeder Alfred A.
Lancer Corporation
Osler Hoskin & Harcourt Llp
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