Forced convection heater

Patent metadata

Field	Value
Publication number	US-11041660-B2
Application number	US-201916422201-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	Sep 21, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A heating assembly includes a heater extending in a longitudinal direction from a first end to a second end. Heat transfer fins are thermally coupled to the heater and extend in a direction transverse to the longitudinal direction. An airflow component is positioned proximate one of the first and second end and is configured to generate airflow along the plurality of heat transfer fins toward the other of the first and second end.

First claim

What is claimed is:

1. A heating assembly, comprising:
a heater including a cartridge heater disposed in a metal bore, the heater extending in a longitudinal direction from a first end to a second end;
a plurality of heat transfer fins thermally coupled to the heater and extending in a direction transverse to the longitudinal direction;
an airflow component positioned proximate one of the first and second end and configured to generate airflow along the plurality of heat transfer fins toward the other of the first and second cud.

2. The heating assembly of claim 1 , wherein the airflow component is an air distribution block coupleable to a source of air and configured to generate the airflow using a plurality of air apertures.

3. The heating assembly of claim 2 , wherein each air aperture is disposed between a pair of heat transfer fins.

4. The heating assembly of claim 1 , and further comprising a thermal control component operably coupled to the heater.

5. The heating assembly of claim 4 , wherein the thermal control component is a thermal cutoff switch.

6. The heating assembly of claim 5 , wherein the thermal cutoff switch is thermally coupled to the heater by a heat pipe.

7. A method of heating a device, the method comprising:
coupling an air distribution block to a source of air′ to receive input air from the source of air;
providing a heating assembly having a heater and a plurality of heatsink fins extending from the heater;
generating air flow from a plurality of air apertures in the air distribution block along the heatsink fins;
coupling the beater to a thermal cutoff switch using a heat pipe; and
controlling the heater using, the thermal cutoff switch.

8. A process gas chromatograph, comprising:
an analyzer oven configured to receive at least one sample, the analyzer oven including:
a heating assembly configured to heat the at least one sample, the heating assembly having a heating component including a cartridge heater disposed within a central portion having a first end and a second end, the central portion having a plurality of heatsink fins coupled thereto; and
an airflow component positioned proximate one of the first and second end and configured to generate airflow along the plurality of heatsink fins toward the other of the first and second end.

9. The process gas chromatograph of claim 8 , and further comprising at least one chromatographic column disposed within the analyzer oven.

10. The process gas chromatograph of claim 8 , wherein the airflow component is an air distribution block coupleable to a source of air and configured to generate the airflow using a plurality of air apertures.

11. The process gas chromatograph of claim 10 , wherein each air aperture is disposed between a pair of heatsink fins.

12. The process gas chromatograph of claim 8 , wherein the electric cartridge heater is disposed within a metal bore.

13. The process gas chromatograph of claim 12 , and further comprising a thermal control component operably coupled to the heater.

14. The process gas chromatograph of claim 13 , wherein the thermal control component is a thermal cutoff switch.

15. The process gas chromatograph of claim 14 , wherein the thermal cutoff switch is thermally coupled to the heater by a heat pipe.

Assignees

• Rosemount Inc

Inventors

• Black Steven S
• Watkins Willis
• Pratt Jason P

Classifications

• H05B1/0247

  For chemical processes · CPC title

• G01N2030/025

  Gas chromatography · CPC title

• G01N2030/3007

  same temperature for whole column · CPC title

• F24H9/0063

  in air channels · CPC title

• G01N2030/3084

  ovens · CPC title