LEAK DETECTION SYSTEM FOR A DISHWASHER AND ASSOCIATED METHOD

• US 20090126465A1
• Filed: 11/16/2007
• Published: 05/21/2009
• Est. Priority Date: 11/16/2007
• Status: Abandoned Application

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Nagel, Douglas J., Kedjierski, Fred Dennis
• Application Number:
  US11/941,441
• Publication Number:
  US 20090126465A1
• Time in Patent Office: Days
• US Class Current: 73/40.50R
• CPC Class Codes: A47L 15/4212 Detection of water leaks; Collection of leaked water, e.g. in the casing
• CPC Class Codes: G01M 3/16 using electric detection means G01M3/045, G01M3/06, G01M3/12, G01M3/20, G01M3/24, G01M3/26 take precedence
• CPC Class Codes: G01M 3/186 for containers, e.g. radiators

Abstract

A leak detection system for a dishwasher is provided, such a leak detection system comprises a catch pan having a bottom portion and adapted to collect a leaking fluid therein. The leak detection system further comprises a leak detection device mounted above the bottom portion of the catch pan. The leak detection device includes a body portion with adjacent and spaced apart first and second contacts extending therefrom toward the bottom portion of the catch pan. One of the first and second contacts extends further toward the bottom portion than the other of the first and second contacts, so as to space the other of the first and second contacts from the bottom portion of the catch pan. An associated method is also provided.

Claims

1. A leak detection system for a dishwasher, the system comprising:

a catch pan having a bottom portion and adapted to collect a leaking fluid therein; and

a leak detection device mounted above the bottom portion of the catch pan, the leak detection device having a body portion with adjacent and spaced apart first and second contact elements extending therefrom toward the bottom portion, one of the first and second contact elements extending further toward the bottom portion than the other of the first and second contact elements, so as to space the other of the first and second contact elements from the bottom portion of the catch pan.

2. A leak detection system according to claim 1, wherein the first and second contact elements comprise an open circuit, the open circuit being closed by contact between the leaking fluid and the first and second contact elements.

3. A leak detection system according to claim 1, wherein the first and second contact elements are oriented perpendicularly to the bottom portion of the catch pan.

4. A leak detection system according to claim 1, wherein the first and second contact elements comprise an electrically conductive material.

5. A leak detection system according to claim 4, wherein the first and second contact elements comprise at least one of gold and stainless steel.

6. A leak detection system according to claim 1, wherein the leak detection device further comprises a detection circuit having the first and second contact elements in communication therewith.

7. A leak detection system according to claim 1, wherein the leak detection device further comprises a third contact element extending from the body portion, the third contact element being adjacent and spaced apart from the first and second contacts, and oriented perpendicularly to the bottom portion of the catch pan.

8. A leak detection system according to claim 7, wherein the third contact element extends from the body portion substantially equal to one of the first and second contact elements.

9. A leak detection system according to claim 8, wherein the third contact element and one of the first and second contact elements comprise an open circuit, the open circuit being closed by contact between the leaking fluid, the third contact element, and the one of the first and second contact elements.

10. A method for detecting a leak in a dishwasher, the method comprising:

mounting a leak detection device above a bottom portion of a catch pan adapted to collect a leaking fluid therein, the leak detection device having a body portion with adjacent and spaced apart first and second contact elements extending therefrom toward the bottom portion, one of the first and second contact elements extending further toward the bottom portion than the other of the first and second contact elements, so as to space the other of the first and second contact elements from the bottom portion of the catch pan; and

generating a signal when leaking fluid accumulating in the catch pan contacts both the first and second contact elements.

11. A method according to claim 10, further comprising actuating an indicia in response to the signal so as to provide notification that the leaking fluid is accumulating in the catch pan.

12. A method according to claim 10, wherein generating a signal further comprises establishing a potential drop across the first and second contact elements, such that the leaking fluid contacting the first and second contact element causes a current flow therebetween, the current flow thereby completing a detection circuit.