Appliance control protection apparatus

• US 6,600,139 B2
• Filed: 06/19/2001
• Issued: 07/29/2003
• Est. Priority Date: 06/19/2001
• Status: Expired due to Term

• Current Assignee: BSH Home Appliances Corporation (Robert Bosch GmbH)
• Original Assignee: BSH Home Appliances Corporation (Robert Bosch GmbH)
• Inventors: Perschl, Franz, Staebler, Manfred W., Platt, Nils
• Primary Examiner(s): PAIK, SANG YEOP
• Application Number:
  US09/885,328
• Publication Number:
  US 20020190055A1
• Time in Patent Office: 770 Days
• Field of Search: 219/445.1, 219/446.1, 219/448.11, 219/448.12, 219/451.1, 219/452.11, 219/452.12, 219/460.1, 219/461.1, 219/465.1, 219/466.1, 126/39.H, 126/39.J, 126/39.K, 126/90.A, 126/92.AC, 126/92.A
• US Class Current: 219/460.1
• CPC Class Codes: F24C 15/10 Tops, e.g. hot plates; Rings cover lids or splash guards F24C15/12; spillage trays or grooves F24C15/14
• CPC Class Codes: H05B 3/746 Protection, e.g. overheat cutoff, hot plate indicator

Abstract

An appliance control protection apparatus for a glass ceramic cooktop is constructed with a double wall housing and a low voltage cooling fan. The double wall housing is comprised of a first inner wall and a outer wall and prevents the transfer of heat from the heating elements in a glass ceramic cooktop towards the electronic control unit. The first inner wall is adhered to the underside of the ceramic glass panel of the cooktop and the outer wall snaps into position over the first wall, resulting in a space therebetween for insulation. Additionally, the control housing is provided with a low voltage fan that convects heat away from hot spots formed on the electronic control unit toward other components within the control housing. The low voltage fan operates in response to certain operating temperatures within the control housing as detected by a heat sensor.

Claims

1. An appliance with control protection apparatus for a glass ceramic cooktop comprising:

a) a glass ceramic cooktop panel having an exposed side and an underside;

b) a set of heating elements affixed to said underside of said glass ceramic cooktop panel;

c) an electronic control unit affixed to said glass underside of said ceramic cooktop panel;

d) a first inner wall adhered to said underside of said ceramic cooktop panel, wherein said first inner wall isolates said electronic control unit from said set of heating elements;

e) an outer wall snapped into position over said first inner wall; and

f) a spacing provided between said first inner wall and said outer wall.

2. The appliance with control protection apparatus of claim 1 further comprising an insulating material inserted into said spacing, wherein said insulating material prevents the transfer of heat from said set of heating elements toward said electronic control unit.

3. The appliance with control protection apparatus of claim 2 wherein said insulating material is air.

4. The appliance with control protection apparatus of claim 2 wherein said insulating material is mineral wool.

5. The appliance with control protection apparatus of claim 1 wherein said first inner wall is constructed of sheet metal.

6. The appliance with control protection apparatus of claim 1 wherein said outer wall is constructed of sheet metal.

7. The appliance with control protection apparatus of claim 1 wherein said first inner wall is adhered with a glue, wherein said glue provides a moisture barrier between said set of heating elements and said electronic control unit.

8. An appliance control protection apparatus for a glass ceramic cooktop panel with an electronic control unit affixed to beneath the panel, the control protection apparatus comprising:

a) a first inner wall adhered beneath the ceramic cooktop panel, wherein said first inner wall isolates the electronic control unit;

b) an outer wall snapped into position over said first inner wall; and

c) a spacing provided between said first inner wall and said outer wall.

9. The appliance control protection apparatus of claim 8 further comprising an insulating material inserted into said spacing, wherein said insulating material prevents the transfer of heat from the electronic control unit.

10. An appliance with control protection apparatus for a glass ceramic cooktop comprising:

a) a glass ceramic cooktop panel having an exposed side and an underside;

b) a set of heating elements affixed to said underside of said glass ceramic cooktop panel;

c) an electronic control unit affixed to said underside of said glass ceramic cooktop panel;

d) a control housing air flow barrier isolating said electronic control unit from said set of heating elements;

e) a heat sensor positioned within said control housing; and

f) a low voltage fan positioned within said control housing, wherein said low voltage fan operates in response to said heat sensor and wherein said low voltage fan convects and dissipates heat away from hot spots of said electronic control unit.

11. The appliance with control protection apparatus of claim 10 wherein said heat sensor is adjacent to said set of heating elements.

12. An appliance control protection apparatus for a glass ceramic cooktop panel with an electronic control unit affixed to beneath the panel, the control protection apparatus comprising:

a) a control housing air flow barrier isolating air flow from the electronic control unit;

b) a heat sensor positioned within said control housing; and

c) a low voltage fan positioned within said control housing, wherein said low voltage fan operates in response to said heat sensor and wherein said low voltage fan convects and dissipates heat away from hot spots of said electronic control unit.

13. The appliance control protection apparatus of claim 12 wherein said heat sensor is adjacent to said electronic control unit.