Welding helmet positive air pressuring system and method

摘要

A method and system for controlling ventilation in a welding helmet is provided. The invention may be adapted to a wide variety of system types, and may reduce or eliminate the need for a shroud or barrier around the head and neck of the welder, of the type used in PAPR systems. The airflow system includes forward and rearward air streams, directed onto the face of the welder, onto the top of the head of the welder, and toward the back of the head of the welder. The air streams help to cool the welder, provide a fresh source of air for breathing, and create a positive pressure system that reduces or excludes entrainment of contaminated external air into the forwardly directed air flow. Certain embodiments may include streams that are filtered, split or redirected via deflectors and conduits to achieve the aforementioned goals.

主权项

1. A method for controlling air flow in a welding helmet comprising:
directing a forward air stream within the helmet forwardly through a conduit extending to the face of a welder; directing a rearward air stream within the helmet rearwardly with a deflector disposed on the conduit to reduce or prevent entrainment of air from a rear region of the helmet into the forward air stream; and wherein the forward air stream is directed forwardly onto a generally top portion of the head of the welder.