Vineyard heater for frost protection - hot air blown along line to issue at spaced outlets

摘要

Vineyard heater for frost protection duty consists of a device for heating the air which is then blown along a hose laid on the ground so as to issue through outlets at intervals along it. The main line should comprise a flexible hose for connecting to the heater or blower, with ground hoses leading off the main hose at regular intervals. Thus the main line is without outlet holes and hand operated chokes should be placed where each hose taps off the main line. The hoses should differ in length with the outlets along these increasing in diameter towards the free hose end.