US 7,320,226 B2 | ||
Freezer with defrost function and method for operating the freezer | ||
Georg Strauss, Giengen (Germany) | ||
Assigned to BSH Bosch und Siemens Hausgeraete GmbH, Munich (Germany) | ||
Filed on Nov. 04, 2004, as Appl. No. 10/980,968. | ||
Application 10/980968 is a continuation of application No. PCT/EP03/05004, filed on May 13, 2003. | ||
Claims priority of application No. 102 21 904 (DE), filed on May 16, 2002. | ||
Prior Publication US 2005/0066667 A1, Mar. 31, 2005 | ||
Int. Cl. F25D 21/06 (2006.01); F25D 29/00 (2006.01) |
U.S. Cl. 62—155 [62/151; 62/162] | 1 Claim |
1. A method of controlling a freezer having a cooling surface, and a heating device for heating and defrosting the cooling
surface, a compressor for cooling the freezer, a door providing access to the freezer, a control circuit connected to the
heating device, a timer, and a manual defrost button, the method comprising the acts of:
detecting a start time indicating when the compressor is turned on;
detecting an end time indicating when the compressor is turned off;
comparing the start time and end time and calculating an operating time indicating the duration of time the compressor is
being operated;
initiating a defrost program if the operating time is greater than a pre-determined value;
initiating the defrost program if the operating time is less than the pre-determined value and the manual defrost button is
actuated;
the defrost program comprising:
determining the time of day;
preventing operation of the heating device if the time of day is within a prohibited time interval;
operating the heating device to defrost the freezer if the time of day is within a permitted time interval; and
stopping operation of the heating device and ending the defrost program when the temperature within the freezer is greater
than 0 degrees Celsius.
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