Temperature detection system for food container induction heating system and method

• US 10,237,924 B2
• Filed: 03/15/2013
• Issued: 03/19/2019
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Silgan Containers LLC (Silgan Holdings Incorporated)
• Original Assignee: Silgan Containers LLC (Silgan Holdings Incorporated)
• Inventors: Widitora, Alvin, Miller, Douglas C., Sadler, George, Hu, Jianwen, Baker, Gerald J.
• Primary Examiner(s): Chou, Jimmy
• Application Number:
  US13/832,533
• Publication Number:
  US 20140263287A1
• Time in Patent Office: 2,195 Days
• Field of Search: 219635, 219645, 219647, 219653, 219654
• CPC Class Codes: H05B 6/06 Control, e.g. of temperature, of power
• CPC Class Codes: H05B 6/107 for continuous movement of material

Abstract

A temperature detection system for detecting temperature within a metallic can during heating is provided. The system includes an induction heating coil configured to generate an alternating magnetic field, and a hermetically sealed can positioned within the magnetic field generated by the induction coil. At least a portion of the sealed can is formed from a metallic material, and the sealed can includes a food product within the can. The magnetic field causes resistive heating of the metallic material of the sealed can. The system includes a temperature sensing element located within the sealed can configured to generate a signal indicative of the temperature of the food product during heating and a memory device communicably coupled to the temperature sensing element configured to store data related to the signal received from the temperature sensing element.

Claims

1. A real-time temperature detection system for detecting temperature within a metal food can during induction heating comprising:

an induction heating coil generating an alternating magnetic field;

a metal can including side walls, at least one end, and a metal seam which mechanically joins and hermetically seals the end and side walls, the can positioned within the magnetic field generated by the induction coil, the sealed metal can including a food product within the sealed metal can, the magnetic field causing resistive heating of the metal walls;

a rotatable structure engaged with at least one end wall of the metal can and configured to rotate the metal can about a longitudinal axis of the sealed metal can within the induction heating coil;

a temperature sensing element hermetically sealed within the metal can to generate a signal indicative of the temperature of the food product during heating;

a wireless transmitter;

a lead extending through and sealed to one of the end or side walls to couple the temperature sensing element to the wireless transmitter such that the signal indicative of the temperature of the food product during heating is communicated from the temperature sensing element to the wireless transmitter; and

a wireless receiver, wherein the wireless transmitter is configured to transmit data indicative of the temperature of the food product during heating to the wireless receiver, and the wireless receiver is configured to communicate the data indicative of the temperature of the food product during heating to a memory device configured to store data related to the signal received from the temperature sensing element;

wherein the temperature sensing element, the lead and the wireless transmitter are rigidly coupled to the sealed metal can and the rotatable structure, such that the temperature sensing element, the lead and the wireless transmitter rotate with the rotatable structure and the sealed metal can as the sealed metal can is rotated within the induction coil.

2. The real-time temperature detection system of claim 1 wherein the induction heating coil is a helical coil, and the sealed metal can is oriented within the helical coil such that the longitudinal axis of the sealed metal can is substantially perpendicular to the longitudinal axis of the helical coil.

3. The real-time temperature detection system of claim 1 wherein the rotatable structure is configured to rotate the sealed metal can, the temperature sensing element, the lead and the wireless transmitter at a rate between 50 rpm and 600 rpm.

4. The real-time temperature detection system of claim 1 wherein the temperature sensing element is a resistance temperature detecting element.

5. The real-time temperature detection system of claim 1 wherein the temperature sensing element is a platinum resistance temperature detecting element.

6. The real-time temperature detection system of claim 1 wherein the temperature sensing element is positioned entirely within the magnetic field generated by the induction coil and the wireless transmitter is located outside of the magnetic field generated by the induction heating coil.

7. The real-time temperature detection system of claim 1 further comprising a computer coupled to the wireless receiver, wherein the memory device is a memory device of the computer, wherein the computer is configured to display a real-time graph of the temperature sensed by the sensing element.

8. The real-time temperature detection system of claim 1 further comprising a controller in communication with the wireless receiver, the controller configured to receive data indicative of the temperature of the food product during heating and to control the induction heating coil based on the received data.

9. The real-time temperature detection system of claim 1 further comprising a fastener joined and sealed to one end wall of the sealed metal can, the fastener including central channel extending from the exterior of the can through the end wall to the interior of the can, wherein the temperature sensing device is a probe hermetically sealed and coupled to the fastener and the lead passes through the central channel, wherein the fastener is hermetically sealed to the end wall and the central channel is hermetically sealed around the lead.

10. The real-time temperature detection system of claim 9 wherein the fastener is formed from a non-electrically conductive material.

11. The real-time temperature detection system of claim 9 wherein the fastener is formed from a metal having a low magnetic permeability and the end wall of the can is steel.

12. The real-time temperature detection system of claim 1 wherein the temperature sensing element is positioned at the geometric center point of the sealed metal can.

13. A temperature detection system for detecting temperature within a metallic can during heating comprising:

an induction heating coil configured to generate an alternating magnetic field;

a hermetically sealed can positioned within the magnetic field generated by the induction coil, wherein at least a portion of the sealed can is formed from a metallic material and the sealed can includes a food product within the can, the magnetic field causing resistive heating of the metallic material of the sealed can;

a temperature sensing element rigidly coupled to and hermitically sealed within the can to generate a signal indicative of the temperature of the food product during heating; and

a memory device communicably coupled to the temperature sensing element configured to store data related to the signal received from the temperature sensing element.

14. The temperature detection system of claim 13 further comprising a wireless transmitter communicable coupling the temperature sensing element to the memory device.

15. The temperature detection system of claim 14 wherein the wireless transmitter is located outside of the magnetic field generated by the induction heating coil.

16. The temperature detection system of claim 14 further comprising a rotatable structure engaged with an end wall of the sealed can and configured to rotate the sealed can about a longitudinal axis of the sealed can within the induction heating coil, wherein the temperature sensing element and the wireless transmitter are rigidly coupled to the sealed can and the rotatable structure such that the temperature sensing element and the wireless transmitter rotate with the rotatable structure and the sealed can as the sealed can is rotated within the induction coil.

17. The temperature detection system of claim 16 wherein the rotatable structure is configured to rotate the sealed metal can, the temperature sensing element and the wireless transmitter at a rate between 50 rpm and 600 rpm.

18. The temperature detection system of claim 13 wherein the induction heating coil is a helical coil, and the sealed can is oriented within the helical coil such that the longitudinal axis of the sealed can is substantially perpendicular to the longitudinal axis of the helical coil.

19. The temperature detection system of claim 13 wherein the temperature sensing element is a resistance temperature detecting element.

20. The temperature detection system of claim 13 wherein the temperature sensing element is a platinum resistance temperature detecting element.

21. The temperature detection system of claim 13 wherein the temperature sensing element is positioned at the geometric center point of the sealed can.

22. The temperature detection system of claim 13 wherein the sealed can includes a metal sidewall.

23. The temperature detection system of claim 13 wherein the sealed can includes a steel sidewall.

24. The temperature detection system of claim 13 further comprising a fastener hermetically joined and sealed to an end wall of the sealed metal can, the fastener including a central channel extending from the exterior of the can through the end wall to the interior of the can, wherein the temperature sensing element is a probe hermetically sealed and coupled to the fastener.