Weak cooling/overcooling compensation device for refrigerator

• US 6,392,552 B1
• Filed: 12/21/1999
• Issued: 05/21/2002
• Est. Priority Date: 12/31/1998
• Status: Expired due to Term

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Joon Bae
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US09/468,608
• Time in Patent Office: 882 Days
• Field of Search: 340/635, 340/539, 340/286.09, 340/527, 340/511, 340/510, 340/501, 340/585, 340/588, 340/589, 318/139, 622/08, 621/90, 622/09, 622/27
• US Class Current: 340/635
• CPC Class Codes: F25D 29/00 Arrangement or mounting of control or safety devices
• CPC Class Codes: G05B 19/0423 Input/output
• CPC Class Codes: G05B 2219/21006 Detect position switches, connect resistances, analog value gives position
• CPC Class Codes: G05B 2219/25117 Resistors, value, combination defines a digital value
• CPC Class Codes: G05B 2219/2654 Fridge, refrigerator

Abstract

The device for compensating a weak cooling/overcooling for a cooling chamber of a refrigerator has a plurality of resistances connected in series between the power and ground and a plurality of switches connected in parallel to the plurality of resistances. A microprocessor receives a voltage divided according to an open/close state of the plurality of switches through a single input terminal. The device performs a weak cooling/overcooling compensation operation.

Claims

1. A device for compensating weak cooling/overcooling of a refrigerator, the device comprising:

a controlling temperature compensation device having a plurality of resistors connected in series between a power source and ground and a plurality of switching units connected in parallel to the plurality of resistors, respectively, for outputting a selectively divided voltage; and

a microprocessor having an analog/digital conversion unit for converting said divided voltage value to a digital value, said divided voltage being input into a single input terminal of the microprocessor.

2. The device according to claim 1, wherein the switching units comprise option pins which can be cut.