High-velocity electrically heated air impingement apparatus with heater control responsive to two temperature sensors
US6665492B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1997 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Mar 19, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/407
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A high-velocity, accurately responsive impingement heater provides heated air at a substantially constant temperature to a process location to effect control of a process. The heater includes an air line for conducting air from an inlet thereof to the process location. A heat exchanger, including a plurality of electrical heating elements, heats air conducted through the air line. A power driver is connected to the heat exchanger and applies current to the heat exchanger. A controller is connected to the driver and receives a predetermined process temperature input from the user, as required for effecting control of the process. A process temperature sensor is positioned at the process location and measures the temperature of the air provided to the process location. The process temperature sensor provides a process temperature signal to the controller which is indicative of the air temperature at the process location. An internal temperature sensor is positioned immediately downstream from the heat exchanger and measures the temperature of the air at that location in the air line. The internal temperature sensor provides an internal temperature signal to the controller which is in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.