Low pressure control for signaling a time delay for ice making cycle start up

  • US 9,217,597 B2
  • Filed: 08/01/2011
  • Issued: 12/22/2015
  • Est. Priority Date: 08/03/2010
  • Status: Expired due to Fees
First Claim
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1. A method of making ice in an ice making machine comprising:

  • a) compressing vaporized refrigerant, cooling the compressed refrigerant to condense it into a liquid, feeding the condensed refrigerant through an expansion device and vaporizing the refrigerant in an evaporator to create freezing temperatures in an ice-forming mold to freeze water into ice in the shape of mold cavities during an ice making mode;

    b) heating the ice making mold to release the ice therefrom in a harvest mode by separating vaporous and liquid refrigerant within a receiver interconnected between the condenser and the expansion device and feeding vapor from the receiver to the evaporator, wherein the ice-forming mold, evaporator and receiver are disposed in an ice machine unit, and the compressor and condenser are disposed in a condensing unit;

    c) determining if said ice making machine is on and if an ice bin switch is closed;

    if said ice machine is on and said bin switch is closed, then check a low pressure switch;

    then set a time delay for a predetermined time when the low pressure switch is closed; and

    d) if the low pressure switch is closed, then setting a time delay for a predetermined time; and

    determing if said predetermined time delay has elapsed;

    (i) if said predetermined time delay has not elapsed, then return to step (d) thereby saving on the life of the compressor and starting components; and

    (ii) if said predetermined time delay has elapsed, then restarting said compressor in said ice making mode.

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