Non-concentric surface heating element switch

• US 8,258,437 B2
• Filed: 08/27/2009
• Issued: 09/04/2012
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Swayne, Steven M., Donarski, Robert S., Pickard, Stephen A.
• Primary Examiner(s): MULPURI, SAVITRI
• Application Number:
  US12/548,547
• Publication Number:
  US 20110049127A1
• Time in Patent Office: 1,104 Days
• Field of Search: 219/448.17, 219/457.1, 219/462.1, 219/486, 219/483, 219/484, 219/398, 219/452.12, 219/443.1
• US Class Current: 219/443.1
• CPC Class Codes: H05B 1/0266 Cooktops

Abstract

A cooking appliance has a cooktop including a plurality of separately controlled cooking areas. A first heating element and a second heating element are positioned below one of the separately controlled cooking areas. A control switch is coupled to the first heating element and the second heating element and is operable to selectively energize the first heating element and the second heating element.

Claims

1. A cooking appliance, comprising:

a cooktop including a plurality of separately controlled cooking areas,

a first heating element positioned below one of the separately controlled cooking areas,

a second heating element positioned below the same separately controlled cooking area as the first heating element, the second heating element and the first heating element being non-concentric, and

a control switch coupled to the first heating element and the second heating element,

wherein the control switch is operable to (i) energize only the first heating element with a first quantity of power when the switch is located at a first position such that only the first heating element supplies heat to the separately controlled cooking area, (ii) energize only the second heating element when the switch is located at a second position, (iii) energize both the first heating element and the second heating element when the switch is located at a third position, and (iv) increase the power supplied to the first heating element to a second quantity of power as the switch is moved from the first position to the second position such that the first heating element supplies additional heat to the separately controlled cooking area.

2. The cooking appliance of claim 1, further comprising:

a limit switch coupled to the second heating element, the limit switch being operable to de-energize the second heating element when the temperature of the separately controlled cooking area exceeds a specified temperature.

3. The cooking appliance of claim 1, wherein:

the control switch is operable to energize only the second heating element with the second quantity of power when the switch is located at the second position such that only the second heating element supplies heat to the separately controlled cooking area, and

the control switch is operable to increase the power supplied to the second heating element to a third quantity of power as the switch moves from the second position to the third position such that the second heating element supplies additional heat to the separately controlled cooking area.

4. The cooking appliance of claim 3, wherein:

the control switch is operable to supply power to energize the first heating element and the second heating element when the switch is located at the third position such that both the first heating element and the second heating element supply heat to the separately controlled cooking area, and

the sum of the power supplied to the first heating element and the second heating element is equal to the third quantity of power.

5. The cooking appliance of claim 4, wherein the control switch is operable to increase the power supplied to the first heating element and the second heating element as the switch moves from the third position to a fourth position such that additional heat is supplied to the separately controlled cooking area.

6. The cooking appliance of claim 5, wherein the control switch is operable to de-energize the first heating element and the second heating element when the switch is located at the fourth position.

7. The cooking appliance of claim 1, wherein the control switch is an infinite switch.

8. The cooking appliance of claim 1, wherein the cooktop is a glass-ceramic cooktop.

9. A cooking appliance, comprising:

a cooktop including a plurality of separately controlled cooking areas,

a first heating element positioned below one of the plurality of separately controlled cooking areas, the first heating element being operable to supply heat to the separately controlled cooking area when energized,

a second heating element positioned below the same separately controlled cooking area as the first heating element, the second heating element being operable to supply heat to the separately controlled cooking area when energized, the second heating element and the first heating element being non-concentric, and

a control switch coupled to the first heating element and the second heating element,

the control switch being operable to vary the power supplied to the first heating element and the second heating element,

wherein the control switch is operable to;

(i) supply a first quantity of power to the first heating element when the switch is placed in a first position, (ii) supply a second quantity of power to the second heating element when the switch is placed in a second position, and (iii) supply power to the first heating element and the second heating element when the switch is placed in a third position, the sum of the power supplied to the first heating element and the second heating element being equal to a third quantity of power.

10. The cooking appliance of claim 9, wherein the control switch is an infinite switch.