F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
341/3
F25D 21/00 (2006.01) F25B 49/00 (2006.01)
Patent
CA 1132679
ABSTRACT OF THE DISCLOSURE A refrigeration system contains a common compres- sor supplying refrigerant to a plurality of evaporators that are refrigerated and defrosted independently of one another. Individual refrigeration/defrost controls are pro- vided in solid state form for the respective evaporators, and the individual controls are connected with a master control that prevents all of the evaporators from being defrosted at one time. The master control includes a digi- tal time clock providing time signals to each of the indivi- dual refrigeration/defrost controls, and each of the indivi- dual controls can initiate a defrost operation for its respective evaporator on either a timed or demand basis. The master control includes a scanner that interrogates the individual controls in a special manner to initiate defros- ting of the units in order of priority. The master control permits an individual defrost control for a selected evapo- rator to be tested in a timed mode by substantially increa- sing the speed of the time clock while operation of the remaining defrost controls is inhibited.
396019
Emhart Industries Inc.
Ridout & Maybee Llp
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